WO2016070423A1 - 无线网络覆盖增强的方法、装置和*** - Google Patents

无线网络覆盖增强的方法、装置和*** Download PDF

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Publication number
WO2016070423A1
WO2016070423A1 PCT/CN2014/090619 CN2014090619W WO2016070423A1 WO 2016070423 A1 WO2016070423 A1 WO 2016070423A1 CN 2014090619 W CN2014090619 W CN 2014090619W WO 2016070423 A1 WO2016070423 A1 WO 2016070423A1
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WO
WIPO (PCT)
Prior art keywords
terminal
signal
coverage level
network device
downlink
Prior art date
Application number
PCT/CN2014/090619
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English (en)
French (fr)
Inventor
肖洁华
龚政委
Original Assignee
华为技术有限公司
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Filing date
Publication date
Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to PCT/CN2014/090619 priority Critical patent/WO2016070423A1/zh
Priority to EP14905594.9A priority patent/EP3217714B1/en
Priority to CN201480032414.0A priority patent/CN105900478B/zh
Priority to JP2017542232A priority patent/JP6508662B2/ja
Publication of WO2016070423A1 publication Critical patent/WO2016070423A1/zh
Priority to US15/587,475 priority patent/US10524135B2/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
    • H04W16/18—Network planning tools
    • H04W16/20—Network planning tools for indoor coverage or short range network deployment
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B17/00—Monitoring; Testing
    • H04B17/30—Monitoring; Testing of propagation channels
    • H04B17/309—Measuring or estimating channel quality parameters
    • H04B17/318—Received signal strength
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0002—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the transmission rate
    • H04L1/0003—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the transmission rate by switching between different modulation schemes
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0009—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the channel coding
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/08—Arrangements for detecting or preventing errors in the information received by repeating transmission, e.g. Verdan system
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/02—Arrangements for optimising operational condition
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/02—Traffic management, e.g. flow control or congestion control
    • H04W28/04—Error control
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/02—Power saving arrangements
    • H04W52/0209—Power saving arrangements in terminal devices
    • H04W52/0225—Power saving arrangements in terminal devices using monitoring of external events, e.g. the presence of a signal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/002—Transmission of channel access control information
    • H04W74/006—Transmission of channel access control information in the downlink, i.e. towards the terminal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04H—BROADCAST COMMUNICATION
    • H04H20/00—Arrangements for broadcast or for distribution combined with broadcast
    • H04H20/16—Arrangements for broadcast or for distribution of identical information repeatedly
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0015—Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the adaptation strategy
    • H04L1/0019—Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the adaptation strategy in which mode-switching is based on a statistical approach
    • H04L1/0021—Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the adaptation strategy in which mode-switching is based on a statistical approach in which the algorithm uses adaptive thresholds
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/50—Allocation or scheduling criteria for wireless resources
    • H04W72/54—Allocation or scheduling criteria for wireless resources based on quality criteria
    • H04W72/542—Allocation or scheduling criteria for wireless resources based on quality criteria using measured or perceived quality
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

Definitions

  • the present invention relates to communication technologies, and in particular, to a method, apparatus, and system for wireless network coverage enhancement.
  • GSM Global System for Mobile communication
  • UMTS Universal Mobile Telecommunications System
  • LTE Long Term Evolution
  • MTC Machine to Machine Type Communication
  • a Hybrid Automatic Repeat Request (HARQ) or an Automatic Repeat-Request (ARQ) may be used for a short-time coverage or a wireless network with poor coverage.
  • the receiver for example, the base station
  • the receiver sends a message of the data that is not correctly received to the sender (for example, the terminal) through the negative feedback (NACK), and sends the message.
  • NACK negative feedback
  • the party will resend the data that is not correctly received (called data retransmission), and the receiver will softly combine the retransmitted data with the previously transmitted data to improve the correct reception probability of the data, and improve the network to some extent. Coverage performance.
  • the automatic retransmission mechanism adopted by the prior art for coverage enhancement is based on Media Access Control (MAC) layer and/or radio link control (Radio Link).
  • Control hereinafter referred to as the RLC layer layer transmission mechanism
  • the sender needs the receiver's acknowledgment (Acknowledge, hereinafter referred to as ACK) / NACK feedback response mechanism to cooperate.
  • the receiver needs to reply to the NACK message multiple times to trigger multiple retransmissions of the sender, so as to increase the possibility of successful reception by the receiver, the air interface interaction is frequent, and the signaling overhead is large.
  • the transmitting end cannot make timely and effective coverage enhancement adjustments according to the change of the coverage environment, and the coverage enhancement is inefficient.
  • the embodiments of the present invention provide a method, an apparatus, and a system for wireless network coverage enhancement, which are used to solve the technical problem of low coverage enhancement performance and large air interface signaling overhead in the prior art.
  • an embodiment of the present invention provides a terminal, including:
  • a receiving unit configured to receive a downlink signal sent by the network device
  • a processing unit configured to determine, according to the downlink signal, a first coverage level that the terminal is located, and determine an uplink communication parameter according to the first coverage level
  • a sending unit configured to send an uplink signal to the network device according to the uplink communication parameter.
  • the uplink communication parameter includes at least one of the following: a repetition quantity, a channel bandwidth, a transmission power, and a used by the terminal to send the uplink signal Modulation coding method.
  • the downlink signal includes: a first signal transmitted on a downlink synchronization channel SCH, a common transmission At least a second signal transmitted on the channel CCH, a third signal transmitted on the broadcast control channel BCCH, a sequence signal for repeated transmission for downlink synchronization, a reference signal for cell channel measurement, and at least a signal transmitted on the BCCH carrier A signal.
  • the processing unit is configured to: when the downlink signal is successfully decoded, determine the terminal according to the number of times the downlink signal received by the receiving unit and the first preset relationship The first coverage level, where the first preset relationship includes a mapping relationship between the number of times the downlink signal received by the terminal successfully decoding the downlink signal and the first coverage level .
  • the processing The unit is configured to perform energy accumulation on all the downlink signals received by the receiving unit at a time when the downlink signal is received, and combine the energy accumulated signal with the preset reference signal of the downlink signal.
  • Correlation is performed to obtain a correlation value of the downlink signal, and when the correlation value of the downlink signal exceeds a preset threshold, determining, according to the number of times of the downlink signal received by the receiving unit, and a second preset relationship, determining The first coverage level of the terminal, where the second preset relationship includes the number of times the downlink signal is received by the terminal when the correlation value of the downlink signal exceeds a preset threshold, and the The mapping relationship between the first coverage levels.
  • the processing unit when the downlink signal is a signal transmitted on the BCCH carrier, the processing unit is specifically used And measuring a signal receiving strength of the downlink signal received by the receiving unit in a preset time period, and determining a first signal receiving according to a signal receiving strength of the downlink signal measured in the preset time period And determining, according to the first signal receiving strength and the third preset relationship, the first coverage level at which the terminal is located; wherein the third preset relationship includes the first signal receiving strength and a mapping relationship between the first coverage levels.
  • the processing unit when the downlink signal is the reference signal used for cell channel measurement, the processing unit, Specifically, the method is used to measure a path loss between the terminal and the network device according to the downlink signal received by the receiving unit in a preset time period, and according to all paths measured within the preset time period. Determining, determining a first path loss between the terminal and the network device, and determining, according to the first path loss and a fourth preset relationship, the first coverage level of the terminal; The fourth preset relationship includes a mapping relationship between the first path loss and the first coverage level.
  • the sending unit is further configured to: The level is sent to the network device.
  • the processing unit is further configured to establish a service connection with the network device;
  • the receiving unit is further configured to receive a service signal that is repeatedly sent by the network device, where The number of repetitions of the service signal is determined by the network device according to the first coverage level at which the terminal is located;
  • the processing unit is further configured to determine a second coverage level of the terminal according to the number of times the service signal is received and the fifth preset relationship that are received when the service signal is successfully decoded, where the fifth The preset relationship includes a mapping relationship between the number of times the service signal received by the terminal successfully decoding the service signal and the second coverage level.
  • an embodiment of the present invention provides a network device, including:
  • a sending unit configured to send a downlink signal to the terminal
  • a receiving unit configured to receive an uplink signal that is sent by the terminal according to the uplink communication parameter that is determined by the terminal, where the uplink communication parameter is determined by the terminal according to the first coverage level; The terminal is determined according to the downlink signal.
  • the uplink communication parameter includes at least one of the following: a repetition quantity, a channel bandwidth, a transmission power, and a used by the terminal to send the uplink signal Modulation coding method.
  • the downlink signal includes: a second signal transmitted on the downlink synchronization channel SCH, a common transmission At least one of a third signal transmitted on the channel CCH, a fourth signal transmitted on the broadcast control channel BCCH, a sequence signal for repeated transmission for downlink synchronization, a reference signal for cell channel measurement, and a signal transmitted on the BCCH carrier Kind of signal.
  • the receiving unit is further configured to: After the terminal sends the downlink signal, the terminal receives the first coverage level sent by the terminal.
  • the network device further includes: a processing unit;
  • the processing unit is configured to establish a service connection with the terminal after the receiving unit receives the first coverage level sent by the terminal;
  • the sending unit is further configured to: repeatedly send a service signal to the terminal according to the first coverage level, so that the terminal determines, according to the repeatedly sent service signal, a second coverage level that the terminal is located;
  • the processing unit is configured to perform resource scheduling on the terminal according to the first coverage level after the receiving unit receives the first coverage level sent by the terminal.
  • the uplink communication parameter includes a repetition quantity and a channel bandwidth used by the terminal to send the uplink signal
  • the receiving unit is further configured to receive the uplink communication parameter sent by the terminal
  • the processing unit is further configured to decode the uplink signal according to the uplink communication parameter.
  • the present invention provides a method for wireless network coverage enhancement, including:
  • the terminal determines an uplink communication parameter according to the first coverage level
  • the terminal sends an uplink signal to the network device according to the uplink communication parameter.
  • the uplink communication parameter includes at least one of the following: a repetition quantity, a channel bandwidth, a transmission power, and a used by the terminal to send the uplink signal Modulation coding method.
  • the downlink signal includes: a first signal transmitted on a downlink synchronization channel SCH, a common transmission At least one of a second signal transmitted on the channel CCH, a third signal transmitted on the broadcast control channel BCCH, a sequence signal for repeated transmission for downlink synchronization, a reference signal for cell channel measurement, and a signal transmitted on the BCCH carrier Kind of signal.
  • determining, by the terminal, the first coverage level of the terminal according to the downlink signal including:
  • the terminal determines, according to the received number of the downlink signals and the first preset relationship, the first coverage level of the terminal;
  • the first preset relationship includes a mapping relationship between the number of times the downlink signal received by the terminal successfully decoding the downlink signal and the first coverage level.
  • a fourth possible implementation manner of the third aspect when the downlink signal is the sequence signal for the repeated transmission of the downlink synchronization, Determining, according to the downlink signal, the first coverage level that the terminal is located, including:
  • the terminal will perform energy accumulation on all the received downlink signals at the time of receiving the downlink signal;
  • the terminal correlates the energy accumulated signal with a preset reference signal of the downlink signal to obtain a correlation value of the downlink signal
  • the terminal determines, according to the received number of the downlink signal and the second preset relationship, the first coverage level of the terminal;
  • the second preset relationship includes a mapping relationship between the number of times the downlink signal received by the terminal and the first coverage level when the correlation value of the downlink signal exceeds a preset threshold.
  • the terminal when the downlink signal is a signal transmitted on the BCCH carrier, the terminal is configured according to the downlink signal Determining a first coverage level of the terminal, including:
  • the terminal measures a signal receiving strength of the downlink signal received within a preset time period
  • the terminal when the downlink signal is the reference signal used for cell channel measurement, the terminal is configured according to the And determining, by the downlink signal, a first coverage level of the terminal, including:
  • the terminal measures a path loss between the terminal and the network device according to the downlink signal received in a preset time period
  • the fourth preset relationship includes a mapping relationship between the first path loss and the first coverage level.
  • the method further includes:
  • the terminal sends the first coverage level to the network device.
  • the method further includes :
  • the terminal establishes a service connection with the network device
  • the terminal Determining, by the terminal, the second coverage level of the terminal according to the number of times the service signal is received and the fifth preset relationship that is received when the service signal is successfully decoded, where the fifth preset relationship includes And a mapping relationship between the number of times the service signal received by the terminal successfully decoding the service signal and the second coverage level.
  • an embodiment of the present invention provides a method for wireless network coverage enhancement, including:
  • the network device sends a downlink signal to the terminal
  • an uplink signal sent by the terminal according to an uplink communication parameter where the uplink communication parameter is determined by the terminal according to a first coverage level; and the first coverage level is determined by the terminal according to the downlink The signal is determined.
  • the uplink communication parameter includes at least one of the following: a repetition quantity, a channel bandwidth, a transmission power, and a used by the terminal to send the uplink signal Modulation coding method.
  • the downlink signal includes: a first signal transmitted on a downlink synchronization channel SCH, a common transmission At least one of a second signal transmitted on the channel CCH, a third signal transmitted on the broadcast control channel BCCH, a sequence signal for repeated transmission for downlink synchronization, a reference signal for cell channel measurement, and a signal transmitted on the BCCH carrier Kind of signal.
  • the method also includes:
  • the network device receives the first coverage level sent by the terminal.
  • the method further includes :
  • the network device establishes a service connection with the terminal, and repeatedly sends a service signal to the terminal according to the first coverage level, so that the terminal determines, according to the repeatedly sent service signal, that the terminal is located.
  • Second coverage level or,
  • the network device performs resource scheduling on the terminal according to the first coverage level.
  • the method further includes:
  • the network device receives the uplink communication parameter sent by the terminal, and decodes the uplink signal according to the uplink communication parameter.
  • the embodiment of the present invention provides a wireless network coverage enhancement system, comprising the terminal according to any one of the first aspect to the eighth possible implementation manner of the first aspect, and the second aspect to the second aspect A network device as claimed in any one of the fifth possible embodiments.
  • the embodiment of the invention provides a method, a device and a system for wireless network coverage enhancement.
  • the terminal determines a first coverage level of the terminal according to the downlink signal sent by the received network device, and determines an uplink communication parameter according to the first coverage level.
  • the uplink communication parameter is used to send an uplink signal to the network device to implement coverage enhancement of the wireless network, and the probability of successful reception of the uplink signal is improved, thereby eliminating the need for the network device to send the NACK to the terminal, thereby saving the relationship between the terminal and the network device.
  • the air interface overhead shortens the period in which the terminal performs coverage enhancement, thereby reducing the power consumption of the terminal.
  • the method provided by the embodiment of the present invention directly determines the coverage level of the terminal according to the downlink signal, and adjusts the uplink communication parameter according to the coverage level in time, thereby enabling the terminal to perform coverage enhancement adjustment in time and effectively, and improving coverage enhancement. Execution efficiency, thereby improving the performance of uplink communication.
  • Embodiment 1 is a schematic structural diagram of Embodiment 1 of a terminal provided by the present invention.
  • FIG. 2 is a schematic diagram of an existing wireless network coverage provided by the present invention.
  • Embodiment 1 of a network device according to the present invention is a schematic structural diagram of Embodiment 1 of a network device according to the present invention.
  • Embodiment 4 is a schematic structural diagram of Embodiment 2 of a network device according to the present invention.
  • FIG. 5 is a schematic structural diagram of Embodiment 2 of a terminal provided by the present invention.
  • FIG. 6 is a schematic structural diagram of Embodiment 3 of a network device according to the present invention.
  • FIG. 7 is a schematic structural diagram of Embodiment 4 of a network device according to the present invention.
  • FIG. 8 is a schematic structural diagram of an embodiment of a wireless network coverage enhancement system according to the present invention.
  • FIG. 9 is a schematic flowchart diagram of Embodiment 1 of a method for enhancing wireless network coverage provided by the present invention.
  • FIG. 10 is a schematic flowchart diagram of Embodiment 2 of a method for enhancing wireless network coverage provided by the present invention.
  • FIG. 11 is a schematic flowchart diagram of Embodiment 3 of a method for enhancing wireless network coverage provided by the present invention.
  • FIG. 12 is a schematic flowchart diagram of Embodiment 4 of a method for enhancing wireless network coverage provided by the present invention.
  • FIG. 13 is a schematic flowchart of Embodiment 5 of a method for enhancing wireless network coverage provided by the present invention.
  • FIG. 14 is a schematic flowchart diagram of Embodiment 6 of a method for enhancing wireless network coverage provided by the present invention.
  • FIG. 15 is a schematic flowchart diagram of Embodiment 7 of a method for enhancing wireless network coverage provided by the present invention.
  • the terminal involved in the embodiment of the present invention may be a wireless terminal.
  • the wireless terminal can be a device that provides voice and/or data connectivity to the user, a handheld device with wireless connectivity, or other processing device that is connected to the wireless modem.
  • the wireless terminal can communicate with one or more core networks via a radio access network (eg, RAN, Radio Access Network), which can be a mobile terminal, such as a mobile phone (or "cellular" phone) and with a mobile terminal
  • RAN Radio Access Network
  • the computers for example, can be portable, pocket-sized, handheld, computer-integrated or in-vehicle mobile devices that exchange language and/or data with the wireless access network.
  • a wireless terminal may also be called a system, a subscriber unit, a subscriber station, a mobile station, a mobile station, a remote station, an access point, or an access point.
  • Remote Terminal Access Terminal, User Terminal, User Agent, User Device, or User Equipment.
  • the network device involved in this application may be a base station and may be an access point.
  • a base station may refer to a device in an access network that communicates with a wireless terminal over one or more sectors over an air interface.
  • the base station can be used to convert the received air frame to the IP packet as a router between the wireless terminal and the rest of the access network, wherein the remainder of the access network can include an Internet Protocol (IP) network.
  • IP Internet Protocol
  • the base station can also coordinate attribute management of the air interface.
  • the base station may be a base station (BTS, Base Transceiver Station) in GSM or CDMA, or may be a base station (NodeB) in WCDMA, or may be an evolved base station in LTE (NodeB or eNB or e-NodeB, evolutional Node B), this application is not limited.
  • BTS Base Transceiver Station
  • NodeB base station
  • NodeB evolved base station in LTE
  • LTE NodeB or eNB or e-NodeB, evolutional Node B
  • FIG. 1 is a schematic structural diagram of Embodiment 1 of a terminal provided by the present invention. As shown in FIG. 1, the terminal includes a receiving unit 10, a processing unit 11, and a transmitting unit 12.
  • the receiving unit 10 is configured to receive a downlink signal sent by the network device, and the processing unit 11 is configured to determine, according to the downlink signal, a first coverage level, where the terminal is located, and determine, according to the first coverage level,
  • the uplink communication parameter is configured to send an uplink signal to the network device according to the uplink communication parameter determined by the processing unit 11.
  • the network device sends a downlink signal to the terminal, where the downlink signal may be any signal sent by the network device, such as a broadcast signal, a common control signal, a service signal, or the like.
  • the receiving unit 10 After receiving the downlink signal sent by the network device, the receiving unit 10 sends the downlink signal to the processing unit 11; the processing unit 11 determines the first coverage level of the terminal according to the downlink signal.
  • the processing unit 11 may determine the first coverage level of the terminal by measuring or decoding the downlink signal sent in a certain time period.
  • the first coverage level is used to enable the terminal to determine the current coverage performance.
  • the amount of coverage performance that needs to be improved For example, it is assumed that the coverage level of the terminal specifically includes three levels, namely coverage level 0, coverage level 1 and coverage level 2, and coverage level 0 corresponds to the coverage performance of the terminal needs to be improved by 0 dB (ie, no improvement is required), and coverage level 1 corresponds to The coverage performance of the terminal needs to be increased by 0-10dB, and the coverage level 2 needs to be increased by 10-20dB.
  • the maximum value of the coverage performance improvement is considered as the target of the coverage performance improvement, that is, when the processing unit 11 determines that the first coverage level of the terminal is the coverage level 1.
  • the uplink communication parameter is determined according to the first coverage level, and the sending unit 12 sends an uplink signal to the network device according to the uplink communication parameter determined by the processing unit 11, and the coverage performance can be improved by 10 dB.
  • the uplink communication parameter may be the number of times that the terminal repeats when sending the uplink signal to the network device, and may also be the transmit power when the terminal sends the uplink signal to the network device, and may also be the channel bandwidth used when the terminal sends the uplink signal to the network device.
  • the modulation coding mode used by the terminal to send the uplink signal to the network device may also be used.
  • the embodiment of the present invention does not limit the uplink communication parameter, as long as the parameter is related to the coverage performance.
  • the processing unit 11 may improve the coverage performance by 10 dB by using the determined uplink communication parameter.
  • a Maximum Coupling Loss (MCL) value may be used to characterize the coverage performance of the wireless network.
  • MCL0 in FIG. 2 represents the coverage performance of the existing network
  • MCL2 represents the target that the network coverage performance needs to achieve.
  • Taking 20dB as an example for the entire network, its MCL is for the worst terminal in the service area, and can also be called edge user (such as terminal D in Figure 2).
  • edge user such as terminal D in Figure 2
  • CLs of different terminals can be used. Values characterize their coverage performance. For example, in the above FIG.
  • the existing network can serve the terminal A without the coverage enhancement; when the terminal B has the MCL0 ⁇ CL ⁇ MCL1, the existing network Coverage performance can not serve terminal B without coverage enhancement; MCL1 ⁇ CL ⁇ MCL2 of terminal C, the coverage performance of the existing network cannot be served without the coverage enhancement; for the terminal with CL>MCL2, the network cannot be served. .
  • the HARQ or ARQ is based on a MAC layer and/or an RLC layer transmission mechanism, and the terminal needs an ACK/NACK of the network device.
  • the response mechanism cooperates with the execution to improve the possibility of the terminal successfully receiving.
  • the method has frequent air interface interaction, large signaling overhead, and a longer execution period of the coverage enhancement.
  • the power consumption of the terminal is large; in addition, due to factors such as resources, delay, and communication process complexity, the number of retransmissions is generally not set, so the coverage enhancement is limited; in addition, the terminal cannot follow the location.
  • the terminal determines the first coverage level according to the downlink signal sent by the network device, and determines the uplink communication parameter used when sending the uplink signal to the network device by using the first coverage level, that is, Whether the terminal repeatedly transmits the uplink signal to the network device or the number of repetitions of transmitting the uplink signal is determined by the first coverage level of the terminal, and the network device does not need to send ACK/NACK feedback to the terminal (that is, the terminal does not wait for ACK or NACK feedback), so
  • the coverage enhancement period is shorter, which reduces the power consumption of the terminal and the signaling overhead.
  • the flexible repeated transmission times improve the coverage performance of the wireless network.
  • the terminal directly determines the coverage level of the terminal according to the downlink signal. And adjusting the uplink communication parameters in time according to the coverage level, so that the terminal can perform coverage enhancement adjustment in time and effectively, thereby improving the execution efficiency of the coverage enhancement, thereby improving the performance of the uplink communication.
  • the terminal provided by the embodiment of the present invention receives the downlink signal sent by the network device by using the receiving unit, and the processing unit determines the first coverage level of the terminal according to the downlink signal, and determines an uplink communication parameter according to the first coverage level, where the sending unit is configured according to the The uplink communication parameter sends an uplink signal to the network device, thereby implementing coverage enhancement of the wireless network.
  • the terminal provided by the embodiment of the invention improves the probability of successful reception of the uplink signal, so that the network device does not need to send ACK or NACK feedback to the terminal, which saves the air interface overhead between the terminal and the network device, and shortens the period for the coverage enhancement of the terminal. Thereby reducing the power consumption of the terminal.
  • the terminal provided by the embodiment of the present invention directly determines the coverage level of the terminal according to the downlink signal, and adjusts the uplink communication parameter according to the coverage level in time, thereby enabling the terminal to perform coverage enhancement adjustment in time and effectively, and improving coverage enhancement. Execution efficiency, thereby improving the performance of uplink communication.
  • the downlink signal may include a first signal transmitted on a downlink synchronization channel (SCH), a second signal transmitted on a common transport channel (CCH), and a broadcast control channel (Broadcast). At least one of a third signal transmitted on the Control Channel (hereinafter referred to as BCCH), a sequence signal for repeated transmission for downlink synchronization, a reference signal for cell channel measurement, and a signal transmitted on the BCCH carrier.
  • BCCH Control Channel
  • the sequence signal used for the repeated transmission of the downlink synchronization may be the primary synchronization.
  • PSS Primary Synchronization Signal
  • SSS Secondary Synchronization Signal
  • CRS Cell-specific Reference Signals
  • the terminal may determine a first coverage level according to each downlink signal, and then perform corresponding analysis or calculation on the multiple first coverage levels to obtain the most accurate first coverage level of the terminal.
  • the corresponding analysis or calculation of the plurality of first coverage levels may be any calculation such as weighted average, arithmetic average, function mapping, etc., as long as an accurate first coverage level can be ensured.
  • the embodiment relates to when the downlink signal is any one of the first signal, the second signal, and the third signal.
  • the terminal performs a specific process of coverage enhancement.
  • the processing unit 11 is specifically configured to determine, according to the number of times of the downlink signal received by the receiving unit 10 and the first preset relationship, when the downlink signal is successfully decoded.
  • the first coverage level of the terminal where the first preset relationship includes the number of times the downlink signal received by the terminal successfully decoding the downlink signal and the first coverage level Mapping relations.
  • the processing unit 11 Decoding a signal, if the decoding is successful, determining that the number of repetitions of the first signal is 1; if not, then softly combining the next first signal with the first signal that failed the previous decoding, and decoding again, Such a push until the decoding of the first signal is successfully decoded, determining the number of times the first signal is received as soon as the first signal is successfully decoded.
  • the processing unit 11 matches the first preset relationship according to the determined number of repetitions of the first signal to determine the first coverage level at which the terminal is located.
  • the first preset relationship may include a plurality of preset threshold ranges, and each preset threshold range corresponds to one coverage level.
  • the first preset relationship may be in the form of a mapping table.
  • the coverage level of the terminal specifically includes three levels, namely coverage level 0, coverage level 1 and coverage level 2, and coverage level 0 corresponds to coverage performance needs to be improved by 0 dB, coverage level 1 corresponds to coverage performance.
  • the preset threshold range corresponding to the coverage level 2 may be “4 ⁇ first repetition times ⁇ 8”, as shown in Table 1:
  • First repetition count 1 0 0dB 1 ⁇ The number of first repetitions ⁇ 4 1 10dB 4 ⁇ The number of first repetitions ⁇ 8 2 20dB
  • first preset relationship in the foregoing Table 1 is only an example, and the present invention does not limit the form of the first preset relationship or the size of the preset threshold range.
  • the uplink communication parameter used when transmitting the uplink signal to the network device is determined according to the first coverage level.
  • the terminal provided by the embodiment of the present invention receives the downlink signal sent by the network device by the receiving unit, and the processing unit determines the first coverage level of the terminal according to the number of times the downlink signal received by the receiving unit and the first preset relationship are successfully decoded. And determining, according to the first coverage level, an uplink communication parameter used by the terminal to send an uplink signal to the network device, so that the sending unit sends an uplink signal to the network device according to the uplink communication parameter, so as to implement coverage enhancement of the wireless network.
  • the terminal sends an uplink signal to the network device according to the uplink communication parameter determined by the coverage level of the terminal, thereby preventing the terminal from blindly increasing the number of retransmissions to improve the wireless network.
  • the redundancy of the repetition rate caused by the coverage performance reduces the power consumption of the terminal; and the network device does not need to send ACK or NACK feedback to the terminal, which saves the air interface overhead between the terminal and the network device.
  • the terminal provided by the embodiment of the present invention directly determines the coverage level of the terminal according to the downlink signal, and adjusts the uplink communication parameter according to the coverage level in time, thereby enabling the terminal to perform coverage enhancement adjustment in time and effectively, and improving coverage enhancement. Execution efficiency, thereby improving the performance of uplink communication.
  • the embodiment relates to that the terminal performs coverage enhancement when the downlink signal is a sequence signal for repeated transmission of downlink synchronization.
  • the specific process The above-mentioned sequence signal for repeated transmission of downlink synchronization (example Such as: PSS signal or SSS signal) itself has self-repetitive characteristics.
  • the solution of this embodiment can be applied to a scenario of a new air interface.
  • the foregoing embodiment shown in FIG. 1 On the basis of the foregoing embodiment shown in FIG.
  • the processing unit 11 is specifically configured to perform energy accumulation on all the downlink signals received by the receiving unit 10 at the time of receiving the downlink signal, and The energy-accumulated signal is correlated with the preset reference signal of the downlink signal to obtain a correlation value of the downlink signal, and when the correlation value of the downlink signal exceeds a preset threshold, according to the receiving unit 10 Determining, by the number of times of the downlink signal, and the second preset relationship, the first coverage level of the terminal, where the second preset relationship includes that the correlation value of the downlink signal exceeds a preset a mapping relationship between the number of times the downlink signal received by the terminal and the first coverage level when the threshold is used.
  • the following line signal is a PSS signal as an example (the downlink signal is an SSS signal, see the following execution process), and when the receiving unit 10 receives the PSS signal for the first time, the PSS signal is sent to the processing unit 11; 11 correlating the PSS signal with a reference signal of a preset PSS signal in the terminal (the PSS signal sent by the network device received by the terminal is a PSS signal passing through a wireless channel, and the PSS signal has actually been subjected to channel attenuation or interference, etc.
  • the PSS signal sent by the network device received by the terminal is a PSS signal passing through a wireless channel, and the PSS signal has actually been subjected to channel attenuation or interference, etc.
  • the effect is not the ideal PSS signal originally sent by the network device to the terminal, and the reference signal of the preset PSS signal of the terminal is the ideal PSS signal without passing through the wireless channel), obtaining the correlation value of the PSS signal, and determining the PSS signal. Whether the correlation value exceeds the preset threshold; when the preset threshold is exceeded, the processing unit 11 determines that the number of repetitions of the PSS signal is 1, and when the threshold is not exceeded, the processing unit 11 will receive the next PSS signal and the previous PSS signal.
  • the processing unit 11 matches the number of times the receiving unit 10 receives the PSS signal to the second preset relationship when the correlation value of the determined PSS signal is greater than the preset threshold, to determine the first coverage level at which the terminal is located.
  • the second preset relationship may include a plurality of preset threshold ranges, and each preset threshold range corresponds to one coverage level.
  • the second preset relationship may be in the form of a mapping table.
  • the coverage level of the terminal may specifically include three levels, namely coverage level 0, coverage level 1 and coverage level 2, and coverage level 0 corresponding coverage performance needs to be improved by 0 dB, coverage level 1 corresponding coverage.
  • the preset threshold range corresponding to the coverage level 1 is “1 ⁇ second repetition number ⁇ 4”
  • the coverage level 2 corresponds.
  • the preset threshold range can be “4 ⁇ second repetition times ⁇ 8”. For details, see Table 2:
  • Second preset relationship Coverage level Coverage performance improvement Second repetition count 1 0 0dB 1 ⁇ second repetition number ⁇ 4 1 10dB 4 ⁇ second repetition times ⁇ 8 2 20dB
  • the uplink communication parameter used when transmitting the uplink signal to the network device is determined according to the first coverage level.
  • the terminal receives the downlink signal sent by the network device by using the receiving unit, and the processing unit determines, according to the number of downlink signals received by the receiving unit and the second preset relationship, when the correlation value of the downlink signal exceeds the preset threshold, a first coverage level, and determining, according to the first coverage level, an uplink communication parameter used by the terminal to send an uplink signal to the network device, so that the sending unit sends an uplink signal to the network device according to the uplink communication parameter, to implement the wireless network. Coverage enhancement.
  • the terminal sends an uplink signal to the network device according to the uplink communication parameter determined by the coverage level of the terminal, thereby preventing the terminal from blindly increasing the number of retransmissions to improve the wireless network.
  • the redundancy of the repetition rate caused by the coverage performance reduces the power consumption of the terminal; and the network device does not need to send ACK or NACK feedback to the terminal, which saves the air interface overhead between the terminal and the network device.
  • the terminal provided by the embodiment of the present invention directly determines the coverage level of the terminal according to the downlink signal, and adjusts the uplink communication parameter according to the coverage level in time, thereby enabling the terminal to perform coverage enhancement adjustment in time and effectively, and improving coverage enhancement. Execution efficiency, thereby improving the performance of uplink communication.
  • the present embodiment relates to a specific process of performing coverage enhancement when a downlink signal is a signal transmitted on a BCCH carrier.
  • the processing unit 11 is specifically configured to measure signal receiving of the downlink signal received by the receiving unit 10 within a preset time period. Intensity, and determining a first signal receiving strength according to a signal receiving strength of the downlink signal measured within the preset time period, and determining the terminal according to the first signal receiving strength and a third preset relationship The first coverage level, where the third preset relationship includes a mapping relationship between the first signal reception strength and the first coverage level.
  • the network device sends the signal transmitted on the BCCH carrier to the terminal within a preset time period, that is, the signal is sent to the terminal in the BCCH.
  • the receiving unit 10 transmits the signal transmitted on the received BCCH carrier to the processing unit 11, and the processing unit 11 measures the signal reception strength of the signals transmitted on the BCCH carrier, and calculates the received strength according to the signals transmitted on the BCCH carriers.
  • the first signal reception strength is obtained.
  • the first signal receiving strength may be an average signal receiving strength of the signal transmitted on the BCCH carrier, and may also be used by the processing unit 11 for the signal receiving strength of the signal transmitted on all the BCCH carriers in the preset time period. Any of the calculated signal reception intensities.
  • the processing unit 11 matches the determined first signal reception strength with the third preset relationship to determine a first coverage level at which the terminal is located.
  • the third preset relationship may include a plurality of preset threshold ranges, and each preset threshold range corresponds to one coverage level.
  • the third preset relationship may be in the form of a mapping table.
  • the coverage level of the terminal may specifically include three levels, namely coverage level 0, coverage level 1 and coverage level 2, and the coverage level 0 corresponding coverage performance needs to be improved by 0 dB, and the coverage level 1 corresponding coverage performance needs to be improved by 10 dB, coverage level 2
  • the corresponding coverage performance needs to be increased by 20 dB
  • the preset threshold range corresponding to the coverage level 0 is A
  • the preset threshold range corresponding to the coverage level 1 is B
  • the preset threshold range corresponding to the coverage level 2 may be C.
  • the uplink communication parameter used when transmitting the uplink signal to the network device is determined according to the first coverage level.
  • the terminal receives the downlink signal sent by the network device by using the receiving unit, and the processing unit acquires the first signal receiving strength of the downlink signal by measuring the signal receiving strength of each downlink signal received within the preset time period. And determining, according to the first signal receiving strength and the third preset relationship, a first coverage level, where the terminal determines, according to the first coverage level, an uplink communication parameter used by the terminal to send an uplink signal to the network device, so that the sending The unit sends an uplink signal to the network device according to the uplink communication parameter, so as to implement coverage enhancement of the wireless network.
  • the terminal sends an uplink signal to the network device according to the uplink communication parameter determined by the coverage level of the terminal, thereby preventing the terminal from blindly increasing the number of retransmissions to improve the wireless network.
  • the redundancy of the repetition rate caused by the coverage performance reduces the power consumption of the terminal; and the network device does not need to send ACK or NACK feedback to the terminal, which saves the air interface overhead between the terminal and the network device.
  • the terminal provided by the embodiment of the present invention directly determines the coverage level of the terminal according to the downlink signal, and adjusts the uplink communication parameter according to the coverage level in time, thereby enabling the terminal to perform coverage enhancement adjustment in time and effectively, and improving coverage enhancement. Execution efficiency, thereby improving the performance of uplink communication.
  • the embodiment relates to a specific coverage enhancement of the terminal when the downlink signal is a reference signal used for cell channel measurement. process.
  • the processing unit 11 is specifically configured to measure, according to the downlink signal received by the receiving unit 10 within a preset time period, between the terminal and the network device.
  • Path loss and determining a first path loss between the terminal and the network device according to all path loss measured within the preset time period, and according to the first path loss and a fourth preset relationship Determining, by the first coverage level, where the terminal is located, where the fourth preset relationship includes a mapping relationship between the first path loss and the first coverage level.
  • the network device repeatedly sends a CRS signal to the terminal within a preset time period; the receiving unit 10 sends each received CRS signal to the processing unit 11; and the processing unit 11 according to the receiving unit 10
  • Each CRS signal received within a preset time period measures a path loss between the terminal and the network device (a path loss corresponding to one CRS signal), and calculates a first between the terminal and the network device according to the path loss calculation.
  • Path loss optionally, the first path loss may be an average path loss between the terminal and the network device, and may also be a processing unit 11 Calculating the path loss of any path loss between the terminal and the network device in the foregoing preset time period.
  • the processing unit 11 matches the determined first path loss with the fourth preset relationship to determine a first coverage level at which the terminal is located.
  • the fourth preset relationship may include a plurality of preset threshold ranges, and each preset threshold range corresponds to a different coverage level.
  • the fourth preset relationship may be in the form of a mapping table. It is assumed that the coverage level of the terminal may specifically include three levels, namely coverage level 0, coverage level 1 and coverage level 2, and the coverage level 0 corresponding coverage performance needs to be improved by 0 dB, and the coverage level 1 corresponding coverage performance needs to be improved by 10 dB, coverage level 2 The corresponding coverage of the coverage level needs to be increased by 20 dB, and the preset threshold range corresponding to the coverage level 0 is D.
  • the preset threshold range corresponding to the coverage level 1 is E
  • the preset threshold range corresponding to the coverage level 2 can be F. For details, see Table 4. Shown as follows:
  • the uplink communication parameter used when transmitting the uplink signal to the network device is determined according to the first coverage level.
  • the terminal receives the downlink signal sent by the network device by using the receiving unit, and the processing unit measures the path loss between the terminal and the network device according to each CRS signal received by the receiving unit in the preset time period, and acquires the terminal. Determining a first path loss between the network device and the first path loss according to the first path loss and the fourth preset relationship, to determine, according to the first coverage level, when the terminal sends an uplink signal to the network device.
  • the uplink communication parameter is used, so that the sending unit sends an uplink signal to the network device according to the uplink communication parameter, thereby implementing coverage enhancement of the wireless network.
  • the terminal sends an uplink signal to the network device according to the uplink communication parameter determined by the coverage level of the terminal, thereby preventing the terminal from blindly increasing the number of retransmissions to improve the wireless network.
  • the redundancy of the repetition rate caused by the coverage performance reduces the power consumption of the terminal; and the network device does not need to send ACK or NACK feedback to the terminal, which saves the air interface overhead between the terminal and the network device.
  • the terminal provided by the embodiment of the present invention is used.
  • the terminal directly determines the coverage level of the terminal according to the downlink signal, and adjusts the uplink communication parameters in time according to the coverage level, so that the terminal can perform coverage enhancement adjustment in time and effectively, thereby improving the execution efficiency of the coverage enhancement, thereby improving the performance of the uplink communication. .
  • the embodiment relates to that the terminal sends the determined first coverage level to the network device, so that the network device performs the terminal on the terminal.
  • the sending unit 12 is further configured to send the first coverage level to the network device.
  • the first coverage level is sent by the sending unit 12 to the network device.
  • the first coverage level may be directly sent to the network device in an explicit manner (directly in the manner of a message cell), and the first coverage level may be carried in a certain physical signal to be implicit.
  • the mode is sent to the network device.
  • the first coverage level is sent to the network device by using a channel request message sent on a random access channel (RACH).
  • RACH random access channel
  • the terminal may carry the first coverage level information by the number of times the uplink signal is repeatedly transmitted, or other physical layer processing (such as symbol rotation, signal cyclic shift, special sequence addition or scrambling code).
  • the network device After receiving the first coverage level, the network device performs reasonable resource scheduling on the uplink and downlink resources of the terminal.
  • the terminal provided by the embodiment of the present invention, after the processing unit determines the first coverage level of the terminal according to the downlink signal, sends the first coverage level to the network device by using the sending unit, so that the network device schedules the uplink and downlink resources of the terminal. More accurate and improved resource utilization.
  • the embodiment relates to a specific process for the terminal to update the coverage level.
  • the processing unit 11 is further configured to establish a service connection with the network device, and the receiving unit 10 is further configured to receive a service signal that is repeatedly sent by the network device, where the number of repetitions of the service signal is The network device is determined according to the first coverage level at which the terminal is located; the processing unit 11 is further configured to use the number of times the service signal is received according to the successful decoding of the service signal, and the fifth pre- Setting a relationship, determining a second coverage level at which the terminal is located; wherein the fifth preset relationship includes And a mapping relationship between the number of times the service signal received by the terminal successfully decoding the service signal and the second coverage level.
  • the terminal after the terminal determines the first coverage level that the terminal is located, the terminal performs communication with the network device.
  • the above service signal can be a downlink data signal.
  • the receiving unit 10 receives the service signal that is repeatedly sent by the network device, and the number of repetitions of the service signal is determined by the network device according to the first coverage level of the terminal reported by the sending unit 12, and is assumed to be n, that is, the first coverage of the terminal itself.
  • the level determines that the terminal needs to repeat the service signal for n times to successfully decode, so the number of times the network device sends the service signal is n.
  • the receiving unit 10 sends the received service signals to the processing unit 11.
  • the processing unit 11 decodes the service signal. When the decoding is successful, the processing unit records the number of repetitions of the service signal when the decoding succeeds, and assumes that m (m is less than n), that is, the terminal can decode the service signal only after m times.
  • the processing unit 11 matches the fifth preset relationship according to the repetition number (ie, m) of the service signal when the decoding succeeds, and determines the second coverage level of the terminal, so as to update the original first coverage level of the terminal to the second. Coverage level.
  • the terminal may send the second coverage level to the network device by using the sending unit 12, so that the network device allocates a reasonable resource to the terminal according to the second coverage level, thereby avoiding waste of resources caused by redundant transmission.
  • the terminal may further adjust, according to the second coverage level, an uplink communication parameter, such as a repetition quantity or a channel bandwidth or a transmission power or a modulation and coding mode, when the service is performed by using the network device.
  • the terminal provided by the embodiment of the present invention receives, by the receiving unit, a service signal that is repeatedly sent by the network device, where the number of repetitions of the service signal is determined by the network device according to the first coverage level of the terminal; and the processing unit is configured according to the service when successfully decoding.
  • the number of signals and the fifth preset relationship determine the second coverage level at which the terminal is located.
  • the terminal provided by the embodiment of the present invention adjusts the coverage level of the terminal in time, and adjusts the uplink communication parameter in time according to the updated coverage level, so that the terminal can perform coverage enhancement adjustment in time and effectively, and improve coverage enhancement. Execution efficiency, thereby improving the performance of uplink communication.
  • the uplink communication parameter determined by the terminal according to the first coverage level that the terminal is located may be the repetition number, channel bandwidth, and transmit power used by the terminal when transmitting the uplink signal. And at least one of modulation coding methods.
  • the processing unit 11 determines, according to the first coverage level, the channel bandwidth used by the terminal to send an uplink signal to the network device, so that the sending unit 12 can send the uplink to the network device by using the determined channel bandwidth with a preset number of repetitions.
  • the signal, the preset number of repetitions has a corresponding relationship with the determined channel bandwidth used by the terminal to transmit the uplink signal.
  • the channel bandwidth used by the transmitting unit 12 to transmit the uplink signal is narrower, the narrower the channel bandwidth, the more concentrated the energy of the uplink signal sent by the transmitting unit 12, so the preset repetition number is smaller, so the terminal
  • the uplink signal can be sent to the network device with a suitable number of repetitions, which saves the signaling overhead of the terminal.
  • the processing unit 11 may further determine, according to the determined first coverage level, a channel bandwidth and a repetition quantity used by the terminal to send an uplink signal to the network device, that is, the processing unit 11 simultaneously determines that the first coverage level is suitable according to the first coverage level.
  • the channel bandwidth and the number of repetitions used by the terminal to transmit the uplink signal, and the channel bandwidth and the number of repetitions determined herein are comprehensively considered by the processing unit 11 according to the first coverage level, the number of repetitions, and the channel bandwidth.
  • the processing unit 11 may determine a repetition number A according to the first coverage level, and may also determine a channel bandwidth B according to the first coverage level, but the processing unit 11 may be based on an actual wireless environment in the wireless network (eg, the channel speed).
  • the method terminal does not need to repeat the transmission of the uplink signal to the network device many times, which saves the signaling overhead of the terminal.
  • the terminal in the embodiment of the present invention can use multiple modulation and coding modes when communicating with the network device.
  • the processing unit 11 determines, according to the first coverage level, a modulation and coding manner used by the terminal to transmit an uplink signal to the network device. For example, when the first coverage level determined by the terminal is higher, it indicates that the current wireless channel environment of the terminal is poor, and the current coverage performance needs to be increased by a large margin, and the terminal adopts a low-order modulation mode and redundancy.
  • the higher coding mode avoids the redundant transmission caused by the inappropriate modulation and coding mode of the terminal, which saves the signaling overhead of the terminal.
  • the terminal provided in this embodiment enables the terminal to adopt an uplink communication parameter suitable for the terminal to send an uplink signal during uplink communication, which saves the signaling overhead of the terminal.
  • FIG. 3 is a schematic structural diagram of Embodiment 1 of a network device according to the present invention.
  • the network device includes: a transmitting unit 21 and a receiving unit 22.
  • the sending unit 21 is configured to send a downlink signal to the terminal
  • the receiving unit 22 is configured to receive the uplink channel determined by the terminal according to the user.
  • the sending unit 21 sends a downlink signal to the terminal, where the downlink signal may be any signal sent by the network device, such as a broadcast signal, a common control signal, a service signal, or the like.
  • the terminal determines, according to the downlink signal, the first coverage level that the terminal is located.
  • the terminal may determine the first coverage level of the terminal by measuring or decoding the repeatedly transmitted downlink signal in a certain time period.
  • the foregoing first coverage level may correspond to a value that needs to be improved in coverage performance.
  • the coverage level of the terminal may specifically include three levels, namely, coverage level 0, coverage level 1 and coverage level 2, and coverage level 0 corresponds to coverage.
  • the performance needs to be improved by 0dB (that is, no improvement is required).
  • the coverage level 1 needs to improve the coverage performance by 0-10dB
  • the coverage level 2 corresponds to the coverage performance needs to be increased by 10-20dB.
  • the terminal can The uplink communication parameter is determined according to the first coverage level, so that the receiving unit 22 can receive the uplink signal sent by the terminal according to the uplink communication parameter, so that the coverage performance can be improved by 10 dB.
  • the uplink communication parameter may be the number of times that the terminal repeats when sending the uplink signal to the network device, and may also be the power when the terminal sends the uplink signal to the network device, and may also be the signal bandwidth used when the terminal sends the uplink signal to the network device, and
  • the modulation coding mode used for the terminal to send the uplink signal to the network device, etc. does not limit the uplink communication parameter, as long as the parameter is related to the coverage performance.
  • the coverage performance can be improved by 10 dB.
  • the HARQ or ARQ is based on a MAC layer and/or an RLC layer transmission mechanism, and the terminal needs an ACK/NACK of the network device.
  • the response mechanism is implemented in order to facilitate the successful reception of the terminal.
  • the method has frequent air interface interaction, large signaling overhead, and a longer execution period of the coverage enhancement, so that the terminal consumes a large amount of power;
  • the delay and the complexity of the communication process are generally not set, so the coverage enhancement is limited.
  • the terminal cannot make timely and effective coverage enhancement adjustment with the coverage environment change, and the coverage enhancement The execution efficiency is low.
  • the terminal is determined according to the downlink signal sent by the network device.
  • the first coverage level of the body, and the uplink communication parameter used when sending the uplink signal to the network device is determined by the first coverage level, that is, whether the terminal repeatedly sends the uplink signal to the network device or the number of repetitions of sending the uplink signal is determined by the terminal.
  • the first coverage level is determined, the network device does not need to send ACK/NACK feedback to the terminal (that is, the terminal does not have to wait for ACK or NACK feedback), so the coverage enhancement period is shorter, reducing the power consumption of the terminal and signaling.
  • the terminal directly determines the coverage level of the terminal according to the downlink signal, and adjusts the uplink communication parameters according to the coverage level in time, thereby enabling the terminal to be effective in time.
  • the coverage enhancement adjustment is performed to improve the execution efficiency of the coverage enhancement, thereby improving the performance of the uplink communication.
  • the network device provided by the embodiment of the present invention sends a downlink signal to the terminal by using the sending unit, so that the terminal determines the first coverage level according to the downlink signal, and determines the uplink communication parameter according to the first coverage level, so that the receiving unit
  • the uplink signal sent by the terminal according to the determined uplink communication parameter may be received, thereby implementing coverage enhancement of the wireless network.
  • the network device provided by the embodiment of the invention improves the probability of successful reception of the uplink signal, so that the network device does not need to send ACK or NACK feedback to the terminal, which saves the air interface overhead between the terminal and the network device, and shortens the period for the coverage enhancement of the terminal. , thereby reducing the power consumption of the terminal.
  • the terminal provided by the embodiment of the present invention directly determines the coverage level of the terminal according to the downlink signal, and adjusts the uplink communication parameter according to the coverage level in time, thereby enabling the terminal to perform coverage enhancement adjustment in time and effectively, and improving coverage enhancement. Execution efficiency, thereby improving the performance of uplink communication.
  • the downlink signal includes: a first signal transmitted on the SCH channel, a second signal transmitted on the CCH channel, a third signal transmitted on the BCCH, a sequence signal for repeated transmission of downlink synchronization, and a cell channel measurement.
  • the sequence signal for the repeated transmission of the downlink synchronization may be a PSS signal, and may also be an SSS signal; the reference signal used for the cell channel measurement may be a CRS signal.
  • the uplink communication parameter may be: a repetition quantity, a channel bandwidth, a transmission power, and a modulation and coding mode used by the terminal to send the uplink signal.
  • the terminal determines, according to the first coverage level, the channel bandwidth used by the terminal to send an uplink signal to the network device, so that the terminal can The preset number of repetitions uses the determined channel band
  • the wide-band network device sends an uplink signal, and the preset number of repetitions has a corresponding relationship with the channel bandwidth used by the determined terminal to send the uplink signal.
  • the terminal can compare The appropriate number of repetitions sends an uplink signal to the network device, which saves the signaling overhead of the terminal.
  • the terminal may further determine, according to the determined first coverage level, a channel bandwidth and a repetition quantity used by the terminal to send an uplink signal to the network device, that is, the terminal determines, according to the first coverage level, that the terminal is suitable for sending the uplink signal.
  • the channel bandwidth and the number of repetitions used, the channel bandwidth and the number of repetitions determined herein are comprehensively considered by the terminal according to the first coverage level, the number of repetitions, and the channel bandwidth.
  • the terminal may determine a repetition number A according to the first coverage level, and may also determine a channel bandwidth B according to the first coverage level, but the terminal may be according to an actual wireless environment in the wireless network (eg, fast and slow fading of the channel, channel noise).
  • the determined repetition number A, the channel bandwidth B are fine-tuned, a reasonable channel bandwidth a and the repetition number b are selected, and the uplink signal is transmitted on the channel bandwidth a by the repetition number b.
  • the method terminal does not need to repeat the transmission of the uplink signal to the network device many times, which saves the signaling overhead of the terminal.
  • the terminal in the embodiment of the present invention can use multiple modulation and coding modes when communicating with the network device.
  • the terminal determines, according to the first coverage level, a modulation and coding manner used by the terminal to send an uplink signal to the network device. For example, when the first coverage level determined by the terminal is higher, it indicates that the current wireless channel environment of the terminal is poor, and the current coverage performance needs to be increased by a large margin, and the terminal adopts a low-order modulation mode and redundancy.
  • the higher coding mode avoids the redundant transmission caused by the inappropriate modulation and coding mode of the terminal, which saves the signaling overhead of the terminal.
  • the network device provided in this embodiment is configured to enable the terminal to determine a first coverage level according to the downlink signal sent by the network device, and determine, according to the first coverage level, that the terminal can adopt an uplink communication parameter that is suitable for the terminal to send an uplink signal during uplink communication. , saving the signaling overhead of the terminal.
  • FIG. 4 is a schematic structural diagram of Embodiment 2 of a network device according to the present invention.
  • the embodiment relates to a specific process in which the network device receives the first coverage level sent by the terminal, and performs resource scheduling on the terminal according to the first coverage level.
  • the network device may further include a processing unit 23.
  • the receiving unit 22 is further configured to receive the first coverage level sent by the terminal
  • the processing unit 23 is configured to receive, by the receiving unit 22, the terminal After the first coverage level is sent, resource scheduling is performed on the terminal according to the first coverage level.
  • the first coverage level is sent to the network device, and the receiving unit 22 receives the first coverage level, so that the processing unit 23 can calculate according to the first coverage level.
  • the uplink or downlink resources are used to perform reasonable resource scheduling on the terminal.
  • the network device may send a scheduling information to the terminal, where the scheduling information may include an uplink or downlink resource size, so that the terminal learns the time-frequency resource size that should be used when performing uplink communication.
  • the terminal may directly send the first coverage level to the network device in an explicit manner (directly in the manner of a message cell), and may also carry the first coverage level in a certain physical signal feature to hide The way is sent to the network device.
  • the first coverage level may be sent to the network device by using a channel request message sent by the RACH in the sending mode.
  • the terminal may carry the first coverage level information by the number of times of uplink repeated transmission, or other physical layer processing (such as symbol rotation, signal cyclic shift, special sequence addition or scrambling code).
  • the network device provided by the embodiment of the present invention receives the first coverage level sent by the terminal by the receiving unit, and the processing unit performs resource scheduling on the terminal according to the first coverage level, so that the uplink and downlink resource scheduling of the terminal by the network device is more accurate and improved. Resource utilization.
  • the present embodiment relates to a specific process in which a network device establishes a service connection with a terminal, and sends a service signal to the terminal, so that the terminal timely updates its coverage level.
  • the processing unit 23 is further configured to: after the receiving unit 22 receives the first coverage level sent by the terminal, establish a service connection with the terminal; The first coverage level repeatedly sends a service signal to the terminal, so that the terminal determines a second coverage level of the terminal according to the repeatedly sent service signal.
  • the processing unit 23 establishes a service communication with the terminal after the receiving unit 22 receives the first coverage level sent by the terminal.
  • the sending unit 21 repeatedly sends a service signal to the terminal according to the first coverage level received by the receiving unit 22, where the service signal may be a downlink data signal, a downlink voice signal, a downlink video signal, etc., and the number of repetitions of the service signal is a processing unit.
  • the assumption is n, that is, the first coverage level of the terminal itself determines that the terminal needs to be under the network device.
  • the service signal is sent n times to be successfully decoded. Therefore, the processing unit 23 determines that the number of times the service signal is transmitted is n according to the first coverage level received by the receiving unit 22.
  • the terminal decodes the service signal.
  • the terminal determines the number of repetitions of the service signal when the decoding succeeds, and assumes that m (m is less than n), that is, the terminal only needs the network device to send m service signals at this time.
  • the service signal is decoded successfully. Therefore, the terminal matches the fifth preset relationship according to the repetition number (ie, m) of the service signal when the decoding succeeds, and determines the second coverage level of the terminal, so as to update the original first coverage level of the terminal to the second coverage level. .
  • the terminal may further send the second coverage level to the network device, so that the network device allocates a reasonable resource to the terminal according to the second coverage level, thereby avoiding waste of resources caused by redundant transmission.
  • the terminal may further adjust, according to the second coverage level, an uplink communication parameter, such as a repetition quantity or a channel bandwidth or a transmission power or a modulation and coding mode, when the service is performed by using the network device.
  • the network device provided by the embodiment of the present invention after the receiving unit receives the first coverage level sent by the terminal, the processing unit establishes service communication with the terminal; the sending unit repeatedly sends the service signal to the terminal according to the first coverage level, so that the terminal Determining a second coverage level at which the terminal is located according to the repeatedly transmitted service signal.
  • the network device provided by the embodiment of the present invention adjusts the coverage level of the terminal in time, and adjusts the uplink communication parameters in time according to the updated coverage level, so that the terminal can perform coverage enhancement adjustment in time and effectively, and improve coverage enhancement.
  • the execution efficiency improves the performance of the uplink communication.
  • the receiving unit 22 is further configured to: Receiving, by the terminal, the uplink communication parameter, where the processing unit 23 is further configured to decode the uplink signal according to the uplink communication parameter.
  • the network device may learn, according to the uplink communication parameter, how many times the uplink signal sent by the terminal needs to be decoded, so that the uplink signal is successfully decoded, thereby avoiding Repeated decoding of network devices saves processing overhead of network devices.
  • the network device may explicitly know which channel bandwidth or which modulation and coding mode is used to decode the uplink signal, and avoid Blind detection of network equipment (that is, when the network equipment does not know the channel bandwidth or modulation and coding mode used for decoding, it will bring all the channels used by the terminal.
  • the wide or modulation coding mode performs decoding detection, that is, the blind detection of the terminal, which saves the processing overhead of the network device and reduces the decoding complexity of the network device.
  • the network device receives the repetition number or the channel bandwidth or the modulation and coding mode used by the terminal to send the uplink signal, so that the processing unit can use the repetition number or the channel bandwidth or the modulation and coding mode adopted by the uplink signal of the terminal. Accurate decoding of the uplink signal reduces the processing overhead and complexity of the network device when decoding.
  • FIG. 5 is a schematic structural diagram of Embodiment 2 of a terminal provided by the present invention. As shown in FIG. 5, the terminal includes a receiver 30, a processor 31, and a transmitter 32.
  • the receiver 30 is configured to receive a downlink signal sent by the network device, and the processor 31 is configured to determine, according to the downlink signal, a first coverage level, where the terminal is located, and determine, according to the first coverage level,
  • the uplink communication parameter is used by the transmitter 32 to send an uplink signal to the network device according to the uplink communication parameter determined by the processor 31.
  • the network device sends a downlink signal to the terminal, where the downlink signal may be any signal sent by the network device, such as a broadcast signal, a common control signal, a service signal, or the like.
  • the receiver 30 After receiving the downlink signal sent by the network device, the receiver 30 sends the downlink signal to the processor 31.
  • the processor 31 determines the first coverage level of the terminal according to the downlink signal.
  • the processor 31 may determine, by measuring or decoding the downlink signal sent in a certain time period, the first coverage level of the terminal.
  • the first coverage level is used to enable the terminal to determine the coverage performance that needs to be improved based on the current coverage performance.
  • the coverage level of the terminal specifically includes three levels, namely coverage level 0, coverage level 1 and coverage level 2, and coverage level 0 corresponds to the coverage performance of the terminal needs to be improved by 0 dB (ie, no improvement is required), and coverage level 1 corresponds to The coverage performance of the terminal needs to be increased by 0-10dB, and the coverage level 2 needs to be increased by 10-20dB.
  • the coverage performance improvement and the complexity of the system design only the maximum value of the coverage performance improvement is considered as the target of the coverage performance improvement, that is, when the processor 31 determines that the first coverage level of the terminal is the coverage level 1.
  • the uplink communication parameter is determined according to the first coverage level, and the transmitter 32 sends an uplink signal to the network device according to the uplink communication parameter determined by the processor 31, and the coverage performance can be improved by 10 dB.
  • the uplink communication parameter may be the number of times that the terminal repeats when sending the uplink signal to the network device, and may also be the transmit power when the terminal sends the uplink signal to the network device, and may also be the terminal to the network.
  • the channel bandwidth used by the device to send the uplink signal may also be the modulation and coding mode used by the terminal to send the uplink signal to the network device.
  • the embodiment of the present invention does not limit the uplink communication parameter, as long as the parameter is related to the coverage performance. Just fine.
  • the processor 31 may improve the coverage performance by 10 dB by using the determined uplink communication parameter.
  • the HARQ or ARQ is based on a MAC layer and/or an RLC layer transmission mechanism, and the terminal needs an ACK/NACK of the network device.
  • the response mechanism is implemented in order to facilitate the successful reception of the terminal.
  • the method has frequent air interface interaction, large signaling overhead, and a longer execution period of the coverage enhancement, so that the terminal consumes a large amount of power;
  • the delay and the complexity of the communication process are generally not set, so the coverage enhancement is limited.
  • the terminal cannot make timely and effective coverage enhancement adjustment with the coverage environment change, and the coverage enhancement The execution efficiency is low.
  • the terminal determines the first coverage level according to the downlink signal sent by the network device, and determines the uplink communication parameter used when sending the uplink signal to the network device by using the first coverage level, that is, Whether the terminal repeatedly transmits the uplink signal to the network device or the number of repetitions of transmitting the uplink signal is determined by the first coverage level of the terminal, and the network device does not need to send ACK/NACK feedback to the terminal (that is, the terminal does not wait for ACK or NACK feedback), so
  • the coverage enhancement period is shorter, which reduces the power consumption of the terminal and the signaling overhead.
  • the flexible repeated transmission times improve the coverage performance of the wireless network.
  • the terminal directly determines the coverage level of the terminal according to the downlink signal. And adjusting the uplink communication parameters in time according to the coverage level, so that the terminal can perform coverage enhancement adjustment in time and effectively, thereby improving the execution efficiency of the coverage enhancement, thereby improving the performance of the uplink communication.
  • the terminal provided by the embodiment of the present invention receives the downlink signal sent by the network device by using the receiver, and the processor determines the first coverage level of the terminal according to the downlink signal, and determines an uplink communication parameter according to the first coverage level, where the transmitter is configured according to the The uplink communication parameter sends an uplink signal to the network device, thereby implementing coverage enhancement of the wireless network.
  • the terminal provided by the embodiment of the invention improves the probability of successful reception of the uplink signal, so that the network device does not need to send ACK or NACK feedback to the terminal, which saves the air interface overhead between the terminal and the network device, and shortens the period for the coverage enhancement of the terminal. Thereby reducing the power consumption of the terminal.
  • the terminal provided by the embodiment of the present invention directly determines the coverage level of the terminal according to the downlink signal, and adjusts the uplink communication parameter according to the coverage level in time, and further The terminal enables the coverage enhancement adjustment in time and effectively, improves the execution efficiency of the coverage enhancement, and improves the performance of the uplink communication.
  • the downlink signal may include a first signal transmitted on a downlink synchronization channel (SCH), a second signal transmitted on a common transport channel (CCH), and a broadcast control channel (Broadcast). At least one of a third signal transmitted on the Control Channel (hereinafter referred to as BCCH), a sequence signal for repeated transmission for downlink synchronization, a reference signal for cell channel measurement, and a signal transmitted on the BCCH carrier.
  • BCCH Control Channel
  • the sequence signal for the repeated transmission of the downlink synchronization may be a Primary Synchronization Signal (PSS) signal, or may be a Secondary Synchronization Signal (SSS) signal;
  • the reference signal of the channel measurement may be a Cell-specific Reference Signals (CRS) signal.
  • PSS Primary Synchronization Signal
  • SSS Secondary Synchronization Signal
  • CRS Cell-specific Reference Signals
  • the terminal may determine a first coverage level according to each downlink signal, and then perform corresponding analysis or calculation on the multiple first coverage levels to obtain the most accurate first coverage level of the terminal.
  • the corresponding analysis or calculation of the plurality of first coverage levels may be any calculation such as weighted average, arithmetic average, function mapping, etc., as long as an accurate first coverage level can be ensured.
  • the embodiment relates to when the downlink signal is any one of the first signal, the second signal, and the third signal.
  • the terminal performs a specific process of coverage enhancement.
  • the processor 31 is specifically configured to determine, according to the number of times of the downlink signal received by the receiver 30 and the first preset relationship, when the downlink signal is successfully decoded.
  • the first coverage level of the terminal where the first preset relationship includes the number of times the downlink signal received by the terminal successfully decoding the downlink signal and the first coverage level Mapping relations.
  • the downlink signal is the first signal transmitted on the SCH
  • the processor 31 Decoding a signal, if the decoding is successful, determining that the number of repetitions of the first signal is 1; If it is unsuccessful, the next first signal is soft-combined with the first signal that failed the previous decoding, and then decoded again, and so on, until the first signal is decoded successfully, and it is determined that the first signal is successfully decoded when the first signal is decoded. The number of times the first signal.
  • the processor 31 matches the first preset relationship according to the determined number of repetitions of the first signal to determine the first coverage level at which the terminal is located.
  • the first preset relationship may include a plurality of preset threshold ranges, and each preset threshold range corresponds to one coverage level.
  • the first preset relationship may be in the form of a mapping table. For details, refer to the example shown in Table 1 above, and details are not described herein again.
  • the terminal receives the downlink signal sent by the network device by using the receiver, and the processor determines the first coverage level of the terminal according to the number of times the downlink signal received by the receiver and the first preset relationship are successfully decoded. And determining, according to the first coverage level, an uplink communication parameter used by the terminal to send an uplink signal to the network device, so that the transmitter sends an uplink signal to the network device according to the uplink communication parameter, so as to implement coverage enhancement of the wireless network.
  • the terminal sends an uplink signal to the network device according to the uplink communication parameter determined by the coverage level of the terminal, thereby preventing the terminal from blindly increasing the number of retransmissions to improve the wireless network.
  • the redundancy of the repetition rate caused by the coverage performance reduces the power consumption of the terminal; and the network device does not need to send ACK or NACK feedback to the terminal, which saves the air interface overhead between the terminal and the network device.
  • the terminal provided by the embodiment of the present invention directly determines the coverage level of the terminal according to the downlink signal, and adjusts the uplink communication parameter according to the coverage level in time, thereby enabling the terminal to perform coverage enhancement adjustment in time and effectively, and improving coverage enhancement. Execution efficiency, thereby improving the performance of uplink communication.
  • the embodiment relates to that the terminal performs coverage enhancement when the downlink signal is a sequence signal for repeated transmission of downlink synchronization.
  • the specific process The above-described repeated transmission of a sequence signal (for example, a PSS signal or an SSS signal) for downlink synchronization itself has a self-repetitive characteristic.
  • the solution of this embodiment can be applied to a scenario of a new air interface.
  • the processor 31 is specifically configured to perform energy accumulation on all the downlink signals received by the receiver 30 at the time of receiving the downlink signal, and a signal after energy accumulation and a preset of the downlink signal
  • the reference signal is correlated to obtain a correlation value of the downlink signal, and when the correlation value of the downlink signal exceeds a preset threshold, according to the number of times of the downlink signal received by the receiver 30 and the second preset a relationship, where the first coverage level of the terminal is determined, where the second preset relationship includes the number of times the downlink signal is received by the terminal when the correlation value of the downlink signal exceeds a preset threshold A mapping relationship with the first coverage level.
  • the following line signal is a PSS signal as an example (the downlink signal is an SSS signal, see the following execution process), and when the receiver 30 receives the PSS signal for the first time, the PSS signal is sent to the processor 31; 31 correlating the PSS signal with a reference signal of a preset PSS signal in the terminal (the PSS signal sent by the network device received by the terminal is a PSS signal passing through a wireless channel, and the PSS signal is actually subjected to channel attenuation or interference, etc.
  • the downlink signal is an SSS signal, see the following execution process
  • the effect is not the ideal PSS signal originally sent by the network device to the terminal, and the reference signal of the preset PSS signal of the terminal is the ideal PSS signal without passing through the wireless channel), obtaining the correlation value of the PSS signal, and determining the PSS signal. Whether the correlation value exceeds the preset threshold; when the preset threshold is exceeded, the processor 31 determines that the number of repetitions of the PSS signal is 1, and when the threshold is not exceeded, the processor 31 will receive the next PSS signal and the previous PSS signal.
  • the processor 31 matches the number of times the receiver 30 receives the PSS signal to the second preset relationship when the correlation value of the determined PSS signal is greater than the preset threshold, to determine the first coverage level at which the terminal is located.
  • the second preset relationship may include a plurality of preset threshold ranges, and each preset threshold range corresponds to one coverage level.
  • the second preset relationship may be in the form of a mapping table. For details, refer to the example shown in Table 2 above, and details are not described herein again.
  • the terminal receives the downlink signal sent by the network device by using the receiver, and the processor determines the terminal according to the number of times the downlink signal received by the receiver and the second preset relationship when the correlation value of the downlink signal exceeds the preset threshold. a first coverage level, and determining, according to the first coverage level, an uplink communication parameter used by the terminal to send an uplink signal to the network device, thereby causing the transmitter And transmitting an uplink signal to the network device according to the uplink communication parameter, so as to implement coverage enhancement of the wireless network.
  • the terminal sends an uplink signal to the network device according to the uplink communication parameter determined by the coverage level of the terminal, thereby preventing the terminal from blindly increasing the number of retransmissions to improve the wireless network.
  • the redundancy of the repetition rate caused by the coverage performance reduces the power consumption of the terminal; and the network device does not need to send ACK or NACK feedback to the terminal, which saves the air interface overhead between the terminal and the network device.
  • the terminal provided by the embodiment of the present invention directly determines the coverage level of the terminal according to the downlink signal, and adjusts the uplink communication parameter according to the coverage level in time, thereby enabling the terminal to perform coverage enhancement adjustment in time and effectively, and improving coverage enhancement. Execution efficiency, thereby improving the performance of uplink communication.
  • the present embodiment relates to a specific process of performing coverage enhancement when a downlink signal is a signal transmitted on a BCCH carrier.
  • the processor 31 is specifically configured to measure a signal receiving strength of the downlink signal received by the receiver 30 within a preset time period, and according to the pre- Setting a signal receiving strength of the downlink signal measured in a time period, determining a first signal receiving strength, and determining, according to the first signal receiving strength and a third preset relationship, the first coverage of the terminal a level; wherein the third preset relationship includes a mapping relationship between the first signal reception strength and the first coverage level.
  • the network device sends the signal transmitted on the BCCH carrier to the terminal within a preset time period, that is, the signal is sent to the terminal in the BCCH.
  • Receiver 30 transmits the signals transmitted on the received BCCH carrier to processor 31, which measures the received signal strength of the signals transmitted on the BCCH carrier and calculates the received strength based on the signals transmitted on the BCCH carriers.
  • the first signal reception strength is obtained.
  • the first signal receiving strength may be an average signal receiving strength of the signal transmitted on the BCCH carrier, and may further perform, by the processor 31, the signal receiving strength of the signal transmitted on all the BCCH carriers in the preset time period. Any of the calculated signal reception intensities.
  • the processor 31 matches the determined first signal reception strength with the third preset relationship to determine a first coverage level at which the terminal is located.
  • the third preset relationship may include a plurality of preset threshold ranges, and each preset threshold range corresponds to one coverage level.
  • the third preset relationship may be in the form of a mapping table. For details, refer to the example shown in Table 3 above, and details are not described herein again.
  • the terminal receives the downlink signal sent by the network device by using the receiver, and the processor obtains the first signal receiving strength of the downlink signal by measuring the signal receiving strength of each downlink signal received within the preset time period. And determining, according to the first signal receiving strength and the third preset relationship, a first coverage level, where the terminal determines, according to the first coverage level, an uplink communication parameter used by the terminal to send an uplink signal to the network device, so that the sending The device sends an uplink signal to the network device according to the uplink communication parameter, so as to implement coverage enhancement of the wireless network.
  • the terminal sends an uplink signal to the network device according to the uplink communication parameter determined by the coverage level of the terminal, thereby preventing the terminal from blindly increasing the number of retransmissions to improve the wireless network.
  • the redundancy of the repetition rate caused by the coverage performance reduces the power consumption of the terminal; and the network device does not need to send ACK or NACK feedback to the terminal, which saves the air interface overhead between the terminal and the network device.
  • the terminal provided by the embodiment of the present invention directly determines the coverage level of the terminal according to the downlink signal, and adjusts the uplink communication parameter according to the coverage level in time, thereby enabling the terminal to perform coverage enhancement adjustment in time and effectively, and improving coverage enhancement. Execution efficiency, thereby improving the performance of uplink communication.
  • the embodiment relates to a specific coverage enhancement of the terminal when the downlink signal is a reference signal used for cell channel measurement. process.
  • the processor 31 is specifically configured to measure, according to the downlink signal received by the receiver 30 within a preset time period, between the terminal and the network device. Path loss, and determining a first path loss between the terminal and the network device according to all path loss measured within the preset time period, and according to the first path loss and a fourth preset relationship Determining, by the first coverage level, where the terminal is located, where the fourth preset relationship includes a mapping relationship between the first path loss and the first coverage level.
  • the network device repeatedly sends a CRS signal to the terminal within a preset time period; the receiver 30 sends each received CRS signal to the processor 31; the processor 31 according to the receiver 30.
  • Each CRS signal received within a preset time period measures a path loss between the terminal and the network device (a path loss corresponding to one CRS signal), and according to the paths The loss calculation is performed to obtain a first path loss between the terminal and the network device.
  • the first path loss may be an average path loss between the terminal and the network device, or may be the processor 31 for the preset time period. Any path loss between the terminal and the network device is calculated as any path loss.
  • the processor 31 matches the determined first path loss with the fourth preset relationship to determine a first coverage level at which the terminal is located.
  • the fourth preset relationship may include a plurality of preset threshold ranges, and each preset threshold range corresponds to a different coverage level.
  • the fourth preset relationship may be in the form of a mapping table. For details, refer to Table 4 above, and details are not described herein again.
  • the terminal receives the downlink signal sent by the network device by using the receiver, and the processor measures the path loss between the terminal and the network device according to each CRS signal received by the receiver in the preset time period, and acquires the terminal. Determining a first path loss between the network device and the first path loss according to the first path loss and the fourth preset relationship, to determine, according to the first coverage level, when the terminal sends an uplink signal to the network device.
  • the uplink communication parameter used is such that the transmitter sends an uplink signal to the network device according to the uplink communication parameter, thereby implementing coverage enhancement of the wireless network.
  • the terminal sends an uplink signal to the network device according to the uplink communication parameter determined by the coverage level of the terminal, thereby preventing the terminal from blindly increasing the number of retransmissions to improve the wireless network.
  • the redundancy of the repetition rate caused by the coverage performance reduces the power consumption of the terminal; and the network device does not need to send ACK or NACK feedback to the terminal, which saves the air interface overhead between the terminal and the network device.
  • the terminal provided by the embodiment of the present invention directly determines the coverage level of the terminal according to the downlink signal, and adjusts the uplink communication parameter according to the coverage level in time, thereby enabling the terminal to perform coverage enhancement adjustment in time and effectively, and improving coverage enhancement. Execution efficiency, thereby improving the performance of uplink communication.
  • the embodiment relates to that the terminal sends the determined first coverage level to the network device, so that the network device performs the terminal on the terminal.
  • the transmitter 32 is further configured to send the first coverage level to the network device.
  • the processor 31 determines, according to the downlink signal, the first coverage level of the terminal. Thereafter, the first coverage level is transmitted by the transmitter 32 to the network device.
  • the first coverage level may be directly sent to the network device in an explicit manner (directly in the manner of a message cell), and the first coverage level may be carried in a certain physical signal to be implicit.
  • the mode is sent to the network device.
  • the first coverage level may be sent to the network device by using a channel request message sent by the RACH in the sending mode.
  • the terminal may carry the first coverage level information by the number of times the uplink signal is repeatedly transmitted, or other physical layer processing (such as symbol rotation, signal cyclic shift, special sequence addition or scrambling code).
  • the network device After receiving the first coverage level, the network device performs reasonable resource scheduling on the uplink and downlink resources of the terminal.
  • the terminal provided by the embodiment of the present invention, after the processor determines the first coverage level of the terminal according to the downlink signal, sends the first coverage level to the network device by using the transmitter, so that the network device schedules the uplink and downlink resources of the terminal. More accurate and improved resource utilization.
  • the embodiment relates to a specific process for the terminal to update the coverage level.
  • the processor 31 is further configured to establish a service connection with the network device, and the receiver 30 is further configured to receive a service signal that is repeatedly sent by the network device, where the number of repetitions of the service signal is The network device is determined according to the first coverage level at which the terminal is located; the processor 31 is further configured to use the number of times the service signal is received according to the successful decoding of the service signal, and the fifth pre- Setting a relationship, determining a second coverage level of the terminal, where the fifth preset relationship includes the number of times the service signal is received and the second coverage when the terminal successfully decodes the service signal The mapping between levels.
  • the terminal after the terminal determines the first coverage level that the terminal is located, the terminal performs communication with the network device.
  • the above service signal can be a downlink data signal.
  • the receiver 30 receives the service signal that is repeatedly sent by the network device, and the number of repetitions of the service signal is determined by the network device according to the first coverage level of the terminal reported by the transmitter 32, and is assumed to be n, that is, the first coverage of the terminal itself.
  • the level determines that the terminal needs to repeat the service signal for n times to successfully decode, so the number of times the network device sends the service signal is n.
  • the receiver 30 sends the received service signals to the processor 31.
  • the processor 31 decodes the service signal.
  • the processor 31 matches the fifth preset relationship according to the repetition number (ie, m) of the service signal when the decoding succeeds, and determines the second coverage level of the terminal, so as to update the original first coverage level of the terminal to the second. Coverage level.
  • the terminal may send the second coverage level to the network device by using the transmitter 32, so that the network device allocates a reasonable resource to the terminal according to the second coverage level, thereby avoiding waste of resources caused by redundant transmission.
  • the terminal may further adjust, according to the second coverage level, an uplink communication parameter, such as a repetition quantity or a channel bandwidth or a transmission power or a modulation and coding mode, when the service is performed by using the network device.
  • the terminal provided by the embodiment of the present invention receives, by the receiver, a service signal that is repeatedly sent by the network device, where the number of repetitions of the service signal is determined by the network device according to the first coverage level of the terminal; and the processor performs the service according to the successful decoding.
  • the number of signals and the fifth preset relationship determine the second coverage level at which the terminal is located.
  • the terminal provided by the embodiment of the present invention adjusts the coverage level of the terminal in time, and adjusts the uplink communication parameter in time according to the updated coverage level, so that the terminal can perform coverage enhancement adjustment in time and effectively, and improve coverage enhancement. Execution efficiency, thereby improving the performance of uplink communication.
  • the uplink communication parameter determined by the terminal according to the first coverage level that the terminal is located may be the repetition number, channel bandwidth, and transmit power used by the terminal when transmitting the uplink signal. And at least one of modulation coding methods.
  • the processor 31 determines, according to the first coverage level, the channel bandwidth used by the terminal to send an uplink signal to the network device, so that the transmission is performed.
  • the device 32 may send an uplink signal to the network device by using a determined channel bandwidth with a preset number of repetitions, and the preset number of repetitions has a corresponding relationship with the determined channel bandwidth used by the terminal to send the uplink signal.
  • the channel bandwidth used by the transmitter 32 to transmit the uplink signal is narrower, the narrower the channel bandwidth, the more concentrated the energy of the uplink signal sent by the transmitter 32, so the preset repetition number is smaller, so the terminal
  • the uplink signal can be sent to the network device with a suitable number of repetitions, which saves the signaling overhead of the terminal.
  • the processor 31 may further determine, according to the determined first coverage level, a channel bandwidth and a repetition quantity used by the terminal to send an uplink signal to the network device, that is, the processor 31 simultaneously determines that the terminal layer is suitable according to the first coverage level.
  • the channel bandwidth and number of repetitions determined herein are comprehensively considered by the processor 31 based on the first coverage level, the number of repetitions, and the channel bandwidth.
  • the processor 31 may determine a repetition number A according to the first coverage level, and may also determine a channel bandwidth B according to the first coverage level, but the processor 31 may be according to an actual wireless environment in the wireless network (for example, the speed of the channel).
  • the method terminal does not need to repeat the transmission of the uplink signal to the network device many times, which saves the signaling overhead of the terminal.
  • the terminal in the embodiment of the present invention can use multiple modulation and coding modes when communicating with the network device.
  • the processor 31 determines a modulation and coding mode used by the terminal to transmit an uplink signal to the network device according to the first coverage level. For example, when the first coverage level determined by the terminal is higher, it indicates that the current wireless channel environment of the terminal is poor, and the current coverage performance needs to be increased by a large margin, and the terminal adopts a low-order modulation mode and redundancy.
  • the higher coding mode avoids the redundant transmission caused by the inappropriate modulation and coding mode of the terminal, which saves the signaling overhead of the terminal.
  • the terminal provided in this embodiment enables the terminal to adopt an uplink communication parameter suitable for the terminal to send an uplink signal during uplink communication, which saves the signaling overhead of the terminal.
  • FIG. 6 is a schematic structural diagram of Embodiment 3 of a network device according to the present invention.
  • the network device includes a transmitter 41 and a receiver 42.
  • the transmitter 41 is configured to send a downlink signal to the terminal
  • the receiver 42 is configured to receive an uplink signal sent by the terminal according to the uplink communication parameter determined by the terminal, where the uplink communication parameter is the terminal according to the Determined by the first coverage level, the first coverage level is determined by the terminal according to the downlink signal.
  • the transmitter 41 sends a downlink signal to the terminal, where the downlink signal may be any signal sent by the network device, such as a broadcast signal, a common control signal, a service signal, or the like.
  • the terminal determines, according to the downlink signal, the first coverage level that the terminal is located.
  • the terminal may determine the first coverage level of the terminal by measuring or decoding the repeatedly transmitted downlink signal in a certain time period.
  • the foregoing first coverage level may correspond to a value that needs to be improved in coverage performance.
  • the coverage level of the terminal may specifically include three levels, namely, coverage level 0, coverage level 1 and coverage level 2, and coverage level 0 corresponds to coverage.
  • the performance needs to be improved by 0dB (that is, no improvement is required), and the coverage level 1 needs to improve the coverage performance by 0-10dB, and the coverage level 2 corresponds to the coverage performance needs to be improved. 10-20dB.
  • the terminal can The uplink communication parameter is determined according to the first coverage level, so that the receiver 42 can receive the uplink signal sent by the terminal according to the uplink communication parameter, so that the coverage performance can be improved by 10 dB.
  • the uplink communication parameter may be the number of times that the terminal repeats when sending the uplink signal to the network device, and may also be the power when the terminal sends the uplink signal to the network device, and may also be the signal bandwidth used when the terminal sends the uplink signal to the network device, and
  • the modulation coding mode used for the terminal to send the uplink signal to the network device, etc. does not limit the uplink communication parameter, as long as the parameter is related to the coverage performance.
  • the coverage performance can be improved by 10 dB.
  • the HARQ or ARQ is based on a MAC layer and/or an RLC layer transmission mechanism, and the terminal needs an ACK/NACK of the network device.
  • the response mechanism is implemented in order to facilitate the successful reception of the terminal.
  • the method has frequent air interface interaction, large signaling overhead, and a longer execution period of the coverage enhancement, so that the terminal consumes a large amount of power;
  • the delay and the complexity of the communication process are generally not set, so the coverage enhancement is limited.
  • the terminal cannot make timely and effective coverage enhancement adjustment with the coverage environment change, and the coverage enhancement The execution efficiency is low.
  • the terminal determines the first coverage level according to the downlink signal sent by the network device, and determines the uplink communication parameter used when sending the uplink signal to the network device by using the first coverage level, that is, Whether the terminal repeatedly transmits the uplink signal to the network device or the number of repetitions of transmitting the uplink signal is determined by the first coverage level of the terminal, and the network device does not need to send ACK/NACK feedback to the terminal (that is, the terminal does not wait for ACK or NACK feedback), so
  • the coverage enhancement period is shorter, which reduces the power consumption of the terminal and the signaling overhead.
  • the flexible repeated transmission times improve the coverage performance of the wireless network.
  • the terminal directly determines the coverage level of the terminal according to the downlink signal. And adjusting the uplink communication parameters in time according to the coverage level, so that the terminal can perform coverage enhancement adjustment in time and effectively, thereby improving the execution efficiency of the coverage enhancement, thereby improving the performance of the uplink communication.
  • the network device provided by the embodiment of the present invention sends a downlink signal to the terminal through the transmitter, so that the terminal determines, according to the downlink signal, the first coverage level that is located by the terminal, and according to the first coverage level.
  • the uplink communication parameter is determined, so that the receiver can receive the uplink signal sent by the terminal according to the determined uplink communication parameter, thereby implementing coverage enhancement of the wireless network.
  • the network device provided by the embodiment of the invention improves the probability of successful reception of the uplink signal, so that the network device does not need to send ACK or NACK feedback to the terminal, which saves the air interface overhead between the terminal and the network device, and shortens the period for the coverage enhancement of the terminal. , thereby reducing the power consumption of the terminal.
  • the terminal provided by the embodiment of the present invention directly determines the coverage level of the terminal according to the downlink signal, and adjusts the uplink communication parameter according to the coverage level in time, thereby enabling the terminal to perform coverage enhancement adjustment in time and effectively, and improving coverage enhancement. Execution efficiency, thereby improving the performance of uplink communication.
  • the downlink signal includes: a first signal transmitted on the SCH channel, a second signal transmitted on the CCH channel, a third signal transmitted on the BCCH, a sequence signal for repeated transmission of downlink synchronization, and a cell channel measurement.
  • the sequence signal for the repeated transmission of the downlink synchronization may be a PSS signal, and may also be an SSS signal; the reference signal used for the cell channel measurement may be a CRS signal.
  • the uplink communication parameter may be: a repetition quantity, a channel bandwidth, a transmission power, and a modulation and coding mode used by the terminal to send the uplink signal.
  • the terminal determines, according to the first coverage level, the channel bandwidth used by the terminal to send an uplink signal to the network device, so that the terminal can The preset number of repetitions sends an uplink signal to the network device by using the determined channel bandwidth, and the preset number of repetitions has a corresponding relationship with the channel bandwidth used by the determined terminal to send the uplink signal.
  • the terminal can compare The appropriate number of repetitions sends an uplink signal to the network device, which saves the signaling overhead of the terminal.
  • the terminal may further determine, according to the determined first coverage level, a channel bandwidth and a repetition quantity used by the terminal to send an uplink signal to the network device, that is, the terminal determines, according to the first coverage level, that the terminal is suitable for sending the uplink signal.
  • the channel bandwidth and the number of repetitions used, the channel bandwidth and the number of repetitions determined herein are comprehensively considered by the terminal according to the first coverage level, the number of repetitions, and the channel bandwidth.
  • the terminal may determine a repetition number A according to the first coverage level, and may also determine a channel bandwidth B according to the first coverage level, but the terminal may be based on the wireless network.
  • the wireless environment fine-tunes the determined number of repetitions A and channel bandwidth B, selects a reasonable channel bandwidth a and the number of repetitions b, and repeats the number of times on the channel bandwidth a.
  • b sends an upstream signal.
  • the method terminal does not need to repeat the transmission of the uplink signal to the network device many times, which saves the signaling overhead of the terminal.
  • the terminal in the embodiment of the present invention can use multiple modulation and coding modes when communicating with the network device.
  • the terminal determines, according to the first coverage level, a modulation and coding manner used by the terminal to send an uplink signal to the network device. For example, when the first coverage level determined by the terminal is higher, it indicates that the current wireless channel environment of the terminal is poor, and the current coverage performance needs to be increased by a large margin, and the terminal adopts a low-order modulation mode and redundancy.
  • the higher coding mode avoids the redundant transmission caused by the inappropriate modulation and coding mode of the terminal, which saves the signaling overhead of the terminal.
  • the network device provided in this embodiment is configured to enable the terminal to determine a first coverage level according to the downlink signal sent by the network device, and determine, according to the first coverage level, that the terminal can adopt an uplink communication parameter that is suitable for the terminal to send an uplink signal during uplink communication. , saving the signaling overhead of the terminal.
  • FIG. 7 is a schematic structural diagram of Embodiment 4 of a network device according to the present invention.
  • the embodiment relates to a specific process in which the network device receives the first coverage level sent by the terminal, and performs resource scheduling on the terminal according to the first coverage level.
  • the network device may further include a processor 43.
  • the receiver 42 is further configured to receive the first coverage level sent by the terminal, where the processor 43 is configured to: after the receiver 42 receives the first coverage level sent by the terminal, according to the The first coverage level performs resource scheduling on the terminal.
  • the first coverage level is sent to the network device, and the receiver 42 receives the first coverage level, so that the processor 43 can calculate according to the first coverage level.
  • the uplink or downlink resources are used to perform reasonable resource scheduling on the terminal.
  • the network device may send a scheduling information to the terminal, where the scheduling information may include an uplink or downlink resource size, so that the terminal learns the time-frequency resource size that should be used when performing uplink communication.
  • the terminal may directly send the first coverage level to the network device in an explicit manner (directly in the manner of a message cell), and may also carry the first coverage level in a certain physical signal feature to hide The way is sent to the network device.
  • the first coverage level may be sent to the network device by using a channel request message sent by the RACH in the sending mode.
  • the number of times the terminal can repeat transmission through the uplink, or other physical layer processing (such as symbol rotation, letter The cyclic shift, the addition of a special sequence, or a scrambling code, etc.) carry the first coverage level information.
  • the network device provided by the embodiment of the present invention receives the first coverage level sent by the terminal by using the receiver, and the processor performs resource scheduling on the terminal according to the first coverage level, so that the network device performs more accurate uplink and downlink resource scheduling on the terminal, and improves the Resource utilization.
  • the present embodiment relates to a specific process in which a network device establishes a service connection with a terminal, and sends a service signal to the terminal, so that the terminal timely updates its coverage level.
  • the processor 43 is further configured to establish a service connection with the terminal after the receiver 42 receives the first coverage level sent by the terminal, where the transmitter 41 is further configured to perform The first coverage level repeatedly sends a service signal to the terminal, so that the terminal determines a second coverage level of the terminal according to the repeatedly sent service signal.
  • the processor 43 establishes service communication with the terminal after the receiver 42 receives the first coverage level sent by the terminal.
  • the transmitter 41 repeatedly sends a service signal to the terminal according to the first coverage level received by the receiver 42.
  • the service signal may be a downlink data signal, a downlink voice signal, a downlink video signal, and the like, and the number of repetitions of the service signal is a processor.
  • the assumption is n, that is, the first coverage level of the terminal itself determines that the terminal needs the network device to send n service signals to successfully decode, so the processor 43 receives according to the receiver 42.
  • the first coverage level determined determines that the number of times the service signal is transmitted is n.
  • the terminal decodes the service signal.
  • the terminal determines the number of repetitions of the service signal when the decoding succeeds, and assumes that m (m is less than n), that is, the terminal only needs the network device to send m service signals at this time.
  • the service signal is decoded successfully. Therefore, the terminal matches the fifth preset relationship according to the repetition number (ie, m) of the service signal when the decoding succeeds, and determines the second coverage level of the terminal, so as to update the original first coverage level of the terminal to the second coverage level. .
  • the terminal may further send the second coverage level to the network device, so that the network device allocates a reasonable resource to the terminal according to the second coverage level, thereby avoiding waste of resources caused by redundant transmission.
  • the terminal may further adjust, according to the second coverage level, an uplink communication parameter, such as a repetition quantity or a channel bandwidth or a transmission power or a modulation and coding mode, when the service is performed by using the network device.
  • the network device provided by the embodiment of the present invention receives the sending by the terminal at the receiver through the processor. After the first coverage level, the service communication is established with the terminal; the transmitter repeatedly sends the service signal to the terminal according to the first coverage level, so that the terminal determines the second coverage level of the terminal according to the repeatedly sent service signal.
  • the network device provided by the embodiment of the present invention adjusts the coverage level of the terminal in time, and adjusts the uplink communication parameters in time according to the updated coverage level, so that the terminal can perform coverage enhancement adjustment in time and effectively, and improve coverage enhancement.
  • the execution efficiency improves the performance of the uplink communication.
  • the receiver 42 is further used to Receiving, by the terminal, the uplink communication parameter, where the processor 43 is further configured to decode the uplink signal according to the uplink communication parameter.
  • the network device may learn, according to the uplink communication parameter, how many times the uplink signal sent by the terminal needs to be decoded, so that the uplink signal is successfully decoded, thereby avoiding Repeated decoding of network devices saves processing overhead of network devices.
  • the network device may explicitly know which channel bandwidth or which modulation and coding mode is used to decode the uplink signal, and avoid Blind detection of network equipment (that is, when the network device does not know the channel bandwidth or modulation and coding mode used for decoding, it will decode and detect all channel bandwidths or modulation and coding modes used by the terminal, that is, blind detection of the terminal), saving the network.
  • the processing overhead of the device reduces the decoding complexity of the network device.
  • the network device receives the repetition number or the channel bandwidth or the modulation and coding mode used by the terminal to send the uplink signal, so that the processor can use the repetition number or the channel bandwidth or the modulation and coding mode adopted by the terminal uplink signal. Accurate decoding of the uplink signal reduces the processing overhead and complexity of the network device when decoding.
  • FIG. 8 is a schematic structural diagram of an embodiment of a wireless network coverage enhancement system according to the present invention. As shown in FIG. 8 , the system includes the terminal 51 shown in the foregoing embodiment and the network device 52 shown in the foregoing embodiment. The implementation principle and technical effects are similar, and details are not described herein again.
  • FIG. 9 is a schematic flowchart diagram of Embodiment 1 of a method for enhancing wireless network coverage provided by the present invention. As shown in FIG. 9, the method includes:
  • S101 The terminal receives the downlink signal sent by the network device.
  • the terminal determines, according to the downlink signal, a first coverage level that the terminal is located.
  • S103 The terminal determines an uplink communication parameter according to the first coverage level.
  • S104 The terminal sends an uplink signal to the network device according to the uplink communication parameter.
  • the uplink communication parameter includes at least one of the following: a repetition quantity, a channel bandwidth, a transmission power, and a modulation and coding mode used for transmitting the uplink signal.
  • the downlink signal includes: a first signal transmitted on a downlink synchronization channel SCH, a second signal transmitted on a common transmission channel CCH, a third signal transmitted on a broadcast control channel BCCH, and a sequence signal for repeated transmission of downlink synchronization. At least one of a reference signal measured on a cell channel and a signal transmitted on a BCCH carrier.
  • the foregoing S102 may be specifically: when the downlink signal is successfully decoded, Determining, by the terminal, the first coverage level that the terminal is located according to the received number of the downlink signals and the first preset relationship; where the first preset relationship includes the terminal successfully decoding the terminal a mapping relationship between the number of times the downlink signal received in the downlink signal and the first coverage level.
  • the foregoing S102 may be specifically: the terminal will receive all the downlinks received at the time of receiving the downlink signal.
  • the signal is subjected to energy accumulation; the terminal correlates the energy-accumulated signal with the preset reference signal of the downlink signal to obtain a correlation value of the downlink signal; when the correlation value of the downlink signal exceeds a preset threshold, Determining, by the terminal, the first coverage level that the terminal is located according to the received number of the downlink signals and the second preset relationship, where the second preset relationship includes that the correlation value of the downlink signal exceeds a mapping relationship between the number of times the downlink signal received by the terminal and the first coverage level when the threshold is preset.
  • the foregoing S102 may be: the terminal measures a signal receiving strength of the downlink signal received in a preset time period; Determining a signal receiving strength of the downlink signal measured in a preset time period, determining a first signal receiving strength; determining, by the terminal, the first location of the terminal according to the first signal receiving strength and a third preset relationship a coverage level; wherein the third preset relationship includes a mapping relationship between the first signal reception strength and the first coverage level.
  • the foregoing S102 may be: the terminal measures the terminal and the location according to the downlink signal received in a preset time period. Determining a path loss between the network devices; determining, by the terminal, the first path loss of the terminal and the network device according to all the path loss measured in the preset time period; the terminal according to the first path loss and the fourth And determining, by the preset relationship, the first coverage level, where the terminal is located, where the fourth preset relationship includes a mapping relationship between the first path loss and the first coverage level.
  • FIG. 10 is a schematic flowchart diagram of Embodiment 2 of a method for enhancing wireless network coverage provided by the present invention.
  • This embodiment relates to a process in which a network device performs resource scheduling on a terminal according to a first coverage level sent by the terminal.
  • the method further includes:
  • S201 The terminal sends the first coverage level to the network device.
  • FIG. 11 is a schematic flowchart diagram of Embodiment 3 of a method for enhancing wireless network coverage provided by the present invention.
  • the embodiment relates to a specific process of updating the coverage level of the terminal according to the service signal sent by the network device when the terminal communicates with the network device.
  • the method may further include:
  • S301 The terminal establishes a service connection with the network device.
  • S302 The terminal receives a service signal that is repeatedly sent by the network device, where the service letter is The number of repetitions of the number is determined by the network device according to the first coverage level at which the terminal is located.
  • the terminal determines a second coverage level of the terminal according to the number of times the service signal is received and the fifth preset relationship that is received when the service signal is successfully decoded, where the fifth preset relationship includes And a mapping relationship between the number of times the service signal received by the terminal successfully decoding the service signal and the second coverage level.
  • FIG. 12 is a schematic flowchart diagram of Embodiment 4 of a method for enhancing wireless network coverage provided by the present invention. As shown in FIG. 12, the method includes:
  • the network device sends a downlink signal to the terminal.
  • the network device receives an uplink signal sent by the terminal according to the uplink communication parameter, where the uplink communication parameter is determined by the terminal according to the first coverage level, and the first coverage level is determined by the terminal according to the downlink The signal is determined.
  • the uplink communication parameter includes at least one of the following: a repetition quantity, a channel bandwidth, a transmission power, and a modulation and coding mode used for transmitting the uplink signal.
  • the downlink signal includes: a first signal transmitted on a downlink synchronization channel SCH, a second signal transmitted on a common transmission channel CCH, a third signal transmitted on a broadcast control channel BCCH, and a sequence signal for repeated transmission of downlink synchronization. At least one of a reference signal measured on a cell channel and a signal transmitted on a BCCH carrier.
  • FIG. 13 is a schematic flowchart diagram of Embodiment 5 of a method for enhancing wireless network coverage provided by the present invention.
  • This embodiment relates to a process in which a network device performs resource scheduling on a terminal according to a first coverage level sent by the terminal.
  • the method further includes:
  • S501 The network device receives the first coverage level sent by the terminal, where the first coverage level is determined by the terminal according to the downlink signal.
  • FIG. 14 is a schematic flowchart diagram of Embodiment 6 of a method for enhancing wireless network coverage provided by the present invention.
  • the embodiment relates to a specific process in which a network device establishes a service connection with a terminal, and repeatedly sends a service signal to the terminal, so that the terminal timely updates the coverage level according to the sent service signal.
  • the method further includes:
  • the network device establishes a service connection with the terminal, and repeatedly sends a service signal to the terminal according to the first coverage level, so that the terminal determines, according to the repeatedly sent service signal, that the terminal is located.
  • the second coverage level or, the network device performs resource scheduling on the terminal according to the first coverage level.
  • FIG. 15 is a schematic flowchart diagram of Embodiment 7 of a method for enhancing wireless network coverage provided by the present invention.
  • This embodiment relates to a process in which a network device decodes an uplink signal according to an uplink communication parameter sent by a terminal. After the above S401, as shown in FIG. 15, the above method further includes:
  • the network device receives the uplink communication parameter sent by the terminal, and decodes the uplink signal according to the uplink communication parameter, where the uplink communication parameter is determined by the terminal according to the first coverage level.
  • the foregoing program may be stored in a computer readable storage medium, and the program is executed when executed.
  • the foregoing steps include the steps of the foregoing method embodiments; and the foregoing storage medium includes: a medium that can store program codes, such as a ROM, a RAM, a magnetic disk, or an optical disk.

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Abstract

本发明提供一种无线网络覆盖增强的方法、装置和***。该方法包括：终端接收网络设备发送的下行信号；所述终端根据所述下行信号，确定所述终端所处的第一覆盖等级；所述终端根据所述第一覆盖等级，确定上行通信参数；所述终端根据所述上行通信参数，向所述网络设备发送上行信号。本发明实施例的方法，提升了上行信号成功接收的概率，从而无需网络设备向终端发送NACK的次数，节省了终端与网络设备之间的空口开销，缩短了终端进行覆盖增强的周期，从而减小终端的耗电。此外，采用本发明实施例提供的方法，能够及时有效地调整上行通信参数，使得终端能够及时有效地进行覆盖增强调整，提高了覆盖增强的执行效率，从而提升上行通信的性能。

Description

无线网络覆盖增强的方法、装置和*** 技术领域
本发明涉及通信技术，尤其涉及一种无线网络覆盖增强的方法、装置和***。
背景技术
现有的无线通信网络，例如全球移动通信***(Global System for Mobile communication，以下简称GSM)、通用移动通信***(Universal Mobile Telecommunications System，以下简称UMTS)、长期演进***(Long Term Evolution，以下简称LTE)，主要针对的是人与人(Human to Human，以下简称H2H)之间的通信，其主要考虑的无线环境是室外或一般的室内场景。目前，第三代合作伙伴计划(3rd Generation Partnership Project，以下简称3GPP)标准上已经开始考虑通过无线网络支持机器与机器(Machine to Machine，以下简称M2M)之间的通信，即机器类型通信(Machine Type Communication，以下简称MTC)。由于部分M2M应用的终端设备会位于地下室、隧道、山谷、森林等无人区域，这些地方的信号覆盖比较差。要想使位于这些覆盖差区域的设备可以正常与网络设备进行通信，需要提升无线网络对位于这些区域内的终端的覆盖性能。
现有技术中，对于短时覆盖或覆盖性能较差的无线网络可以采用混合自动重传请求(Hybrid Automatic Repeat Request，以下简称HARQ)或自动重传请求(Automatic Repeat-Request，以下简称ARQ)的机制。具体的：当数据首次传送时，如果接收方(例如基站)没有正确接收，则接收方通过否认反馈(Nacknowledge，以下简称NACK)将没有正确接收的数据的消息通知发送方(例如终端)，发送方会将该没有正确接收的数据进行重新发送(称为数据的重传)，接收方通过重传的数据和之前发送的数据进行软合并来提高数据的正确接收概率,一定程度上改善了网络的覆盖性能。
但是，现有技术进行覆盖增强所采用的自动重传机制是基于媒体访问控制(Media Access Control，以下简称MAC)层和/或无线链路控制(Radio Link  Control，以下简称RLC)层的发送机制，发送方需要接收方的确认(Acknowledge，以下简称ACK)/NACK反馈的应答机制配合执行。对于信号覆盖较弱的地方，接收方需要多次回复NACK消息来触发发送方的多次重传，以增加接收方成功接收的可能性，空***互频繁，信令开销大。此外，发送端不能随着所处的覆盖环境变化做出及时有效地覆盖增强调整，覆盖增强的执行效率低。
发明内容
本发明实施例提供一种无线网络覆盖增强的方法、装置和***，用以解决现有技术中覆盖增强执行效率低且空口信令开销大的技术问题。
第一方面，本发明实施例提供一种终端，包括：
接收单元，用于接收网络设备发送的下行信号；
处理单元，用于根据所述下行信号，确定所述终端所处的第一覆盖等级，并根据所述第一覆盖等级，确定上行通信参数；
发送单元，用于根据所述上行通信参数，向所述网络设备发送上行信号。
结合第一方面，在第一方面的第一种可能的实施方式中，所述上行通信参数包括以下至少一种：所述终端发送所述上行信号所采用的重复次数、信道带宽、发射功率和调制编码方式。
结合第一方面或第一方面的第一种可能的实施方式，在第一方面的第二种可能的实施方式中，所述下行信号包括：下行同步信道SCH上传输的第一信号、公共传输信道CCH上传输的第二信号、广播控制信道BCCH上传输的第三信号、、用于下行同步的重复发送的序列信号、用于小区信道测量的参考信号、BCCH载波上传输的信号中的至少一种信号。
结合第一方面的第二种可能的实施方式，在第一方面的第三种可能的实施方式中，当所述下行信号为所述第一信号、所述第二信号、所述第三信号中的任一种时，所述处理单元，具体用于当成功解码所述下行信号时，根据所述接收单元接收到的所述下行信号的次数和第一预设关系，确定所述终端所处的所述第一覆盖等级；其中，所述第一预设关系包括所述终端成功解码所述下行信号时接收到的所述下行信号的次数与所述第一覆盖等级之间的映射关系。
结合第一方面的第二种可能的实施方式，在第一方面的第四种可能的实施方式中，当所述下行信号为所述用于下行同步的重复发送的序列信号时，所述处理单元，具体用于将在接收到所述下行信号的时刻对所述接收单元接收到的所有所述下行信号进行能量累积，并将能量累积后的信号与预设的所述下行信号的参考信号进行相关得到所述下行信号的相关值，并在所述下行信号的所述相关值超过预设门限时，根据所述接收单元接收到的所述下行信号的次数和第二预设关系，确定所述终端所处的所述第一覆盖等级；其中，所述第二预设关系包括所述下行信号的相关值超过预设门限时所述终端接收到的所述下行信号的次数与所述第一覆盖等级之间的映射关系。
结合第一方面的第二种可能的实施方式，在第一方面的第五种可能的实施方式中，当所述下行信号为所述BCCH载波上传输的信号时，所述处理单元，具体用于测量所述接收单元在预设时间段内接收到的所述下行信号的信号接收强度，并根据在所述预设时间段内测量的所述下行信号的信号接收强度，确定第一信号接收强度，并根据所述第一信号接收强度以及第三预设关系，确定所述终端所处的所述第一覆盖等级；其中，所述第三预设关系包括所述第一信号接收强度与所述第一覆盖等级之间的映射关系。
结合第一方面的第二种可能的实施方式，在第一方面的第六种可能的实施方式中，当所述下行信号为所述用于小区信道测量的参考信号时，所述处理单元，具体用于根据所述接收单元在预设时间段内接收到的所述下行信号，测量所述终端与所述网络设备之间的路径损耗，并根据所述预设时间段内测量的所有路径损耗，确定所述终端与所述网络设备之间的第一路径损耗，并根据所述第一路径损耗和第四预设关系，确定所述终端所处的所述第一覆盖等级；其中，所述第四预设关系包括所述第一路径损耗与所述第一覆盖等级之间的映射关系。
结合第一方面至第一方面的第六种可能的实施方式中的任一项，在第一方面的第七种可能的实施方式中，所述发送单元，还用于将所述第一覆盖等级发送给所述网络设备。
结合第一方面的第七种可能的实施方式，在第一方面的第八种可能的实施方式中，所述处理单元，还用于与所述网络设备建立业务连接；
所述接收单元，还用于接收所述网络设备重复发送的业务信号；其中， 所述业务信号的重复次数为所述网络设备根据所述终端所处的所述第一覆盖等级确定的；
所述处理单元，还用于根据成功解码所述业务信号时接收到的所述业务信号的次数和第五预设关系，确定所述终端所处的第二覆盖等级；其中，所述第五预设关系包括所述终端成功解码所述业务信号时接收到的所述业务信号的次数和所述第二覆盖等级之间的映射关系。
第二方面，本发明实施例提供一种网络设备，包括：
发送单元，用于向终端送下行信号；
接收单元，用于接收所述终端根据自身所确定的上行通信参数发送的上行信号；其中，所述上行通信参数为所述终端根据所述第一覆盖等级确定的；所述第一覆盖等级为所述终端根据所述下行信号确定的。
结合第二方面，在第二方面的第一种可能的实施方式中，所述上行通信参数包括以下至少一种：所述终端发送所述上行信号所采用的重复次数、信道带宽、发射功率和调制编码方式。
结合第二方面或第二方面的第一种可能的实施方式，在第二方面的第二种可能的实施方式中，所述下行信号包括：下行同步信道SCH上传输的第二信号、公共传输信道CCH上传输的第三信号、广播控制信道BCCH上传输的第四信号、用于下行同步的重复发送的序列信号、用于小区信道测量的参考信号、BCCH载波上传输的信号中的至少一种信号。
结合第二方面至第二方面的第二种可能的实施方式中的任一项，在第二方面的第三种可能的实施方式中，所述接收单元，还用于在所述发送单元向所述终端发送下行信号之后，接收所述终端发送的所述第一覆盖等级。
结合第二方面的第三种可能的实施方式，在第二方面的第四种可能的实施方式中，所述网络设备，还包括：处理单元；
所述处理单元，用于在所述接收单元接收所述终端发送的所述第一覆盖等级之后，与所述终端建立业务连接；
则所述发送单元，还用于根据所述第一覆盖等级向所述终端重复发送业务信号，以使所述终端根据所述重复发送的业务信号确定所述终端所处的第二覆盖等级；
或者，
所述处理单元，用于在所述接收单元接收所述终端发送的所述第一覆盖等级之后，根据所述第一覆盖等级对所述终端进行资源调度。
结合第二方面的第二种可能的实施方式，在第二方面的第五种可能的实施方式中，当所述上行通信参数包括所述终端发送所述上行信号所采用的重复次数、信道带宽或调制编码方式时，所述接收单元，还用于接收所述终端发送的所述上行通信参数；所述处理单元，还用于根据所述上行通信参数解码所述上行信号。
第三方面，本发明提供一种无线网络覆盖增强的方法，包括：
终端接收网络设备发送的下行信号；
所述终端根据所述下行信号，确定所述终端所处的第一覆盖等级；
所述终端根据所述第一覆盖等级，确定上行通信参数；
所述终端根据所述上行通信参数，向所述网络设备发送上行信号。
结合第三方面，在第三方面的第一种可能的实施方式中，所述上行通信参数包括以下至少一种：所述终端发送所述上行信号所采用的重复次数、信道带宽、发射功率和调制编码方式。
结合第三方面或第三方面的第一种可能的实施方式，在第三方面的第二种可能的实施方式中，所述下行信号包括：下行同步信道SCH上传输的第一信号、公共传输信道CCH上传输的第二信号、广播控制信道BCCH上传输的第三信号、用于下行同步的重复发送的序列信号、用于小区信道测量的参考信号、BCCH载波上传输的信号中的至少一种信号。
结合第三方面的第二种可能的实施方式，在第三方面的第三可能的实施方式中，当所述下行信号为所述第一信号、所述第二信号、所述第三信号中的任一种时，所述终端根据所述下行信号，确定所述终端所处的第一覆盖等级，包括：
当成功解码所述下行信号时,所述终端根据接收到的所述下行信号的次数和第一预设关系，确定所述终端所处的所述第一覆盖等级；
其中，所述第一预设关系包括所述终端成功解码所述下行信号时接收到的所述下行信号的次数与所述第一覆盖等级之间的映射关系。
结合第三方面的第二种可能的实施方式，在第三方面的第四可能的实施方式中，当所述下行信号为所述用于下行同步的重复发送的序列信号时，所 述终端根据所述下行信号，确定所述终端所处的第一覆盖等级，包括：
所述终端将在接收到所述下行信号的时刻对所接收到的所有所述下行信号进行能量累积；
所述终端将能量累积后的信号与预设的所述下行信号的参考信号进行相关得到所述下行信号的相关值；
当所述下行信号的所述相关值超过预设门限时，所述终端根据接收到的所述下行信号的次数和第二预设关系，确定所述终端所处的所述第一覆盖等级；
其中，所述第二预设关系包括所述下行信号的相关值超过预设门限时所述终端接收到的所述下行信号的次数与所述第一覆盖等级之间的映射关系。
结合第三方面的第二种可能的实施方式，在第三方面的第五可能的实施方式中，当所述下行信号为所述BCCH载波上传输的信号时，所述终端根据所述下行信号，确定所述终端所处的第一覆盖等级，包括：
所述终端测量在预设时间段内接收到的所述下行信号的信号接收强度；
所述终端根据所述预设时间段内测量的所述下行信号的信号接收强度，确定第一信号接收强度；
所述终端根据所述第一信号接收强度以及第三预设关系，确定所述终端所处的所述第一覆盖等级；其中，所述第三预设关系包括所述第一信号接收强度与所述第一覆盖等级之间的映射关系。
结合第三方面的第二种可能的实施方式，在第三方面的第六可能的实施方式中，当所述下行信号为所述用于小区信道测量的参考信号时，所述终端根据所述下行信号，确定所述终端所处的第一覆盖等级，包括：
所述终端根据预设时间段内接收到的所述下行信号，测量所述终端与所述网络设备之间的路径损耗；
所述终端根据所述预设时间段内测量的所有路径损耗，确定所述终端与所述网络设备的第一路径损耗；
所述终端根据所述第一路径损耗和第四预设关系，确定所述终端所处的所述第一覆盖等级；
其中，所述第四预设关系包括所述第一路径损耗与所述第一覆盖等级之间的映射关系。
结合第三方面至第三方面的第六种可能的实施方式中的任一项，在第三方面的第七种可能的实施方式中，所述方法还包括：
所述终端将所述第一覆盖等级发送给所述网络设备。
结合第三方面的第七种可能的实施方式，在第三方面的第八种可能的实施方式中，所述终端将所述第一覆盖等级发送给所述网络设备之后，所述方法还包括：
所述终端与所述网络设备建立业务连接；
所述终端接收所述网络设备重复发送的业务信号；其中，所述业务信号的重复次数为所述网络设备根据所述终端所处的所述第一覆盖等级确定的；
所述终端根据成功解码所述业务信号时接收到的所述业务信号的次数和第五预设关系，确定所述终端所处的第二覆盖等级；其中，所述第五预设关系包括所述终端成功解码所述业务信号时接收到的所述业务信号的次数和所述第二覆盖等级之间的映射关系。
第四方面，本发明实施例提供一种无线网络覆盖增强的方法，包括：
网络设备向终端发送下行信号；
所述网络设备接收所述终端根据上行通信参数发送的上行信号；其中，所述上行通信参数为所述终端根据第一覆盖等级确定的；所述第一覆盖等级为所述终端根据所述下行信号确定的。
结合第四方面，在第四方面的第一种可能的实施方式中，所述上行通信参数包括以下至少一种：所述终端发送所述上行信号所采用的重复次数、信道带宽、发射功率和调制编码方式。
结合第四方面或第四方面的第一种可能的实施方式，在第四方面的第二种可能的实施方式中，所述下行信号包括：下行同步信道SCH上传输的第一信号、公共传输信道CCH上传输的第二信号、广播控制信道BCCH上传输的第三信号、用于下行同步的重复发送的序列信号、用于小区信道测量的参考信号、BCCH载波上传输的信号中的至少一种信号。
结合第四方面至第四方面的第二种可能的实施方式中的任一项，在第四方面的第三种可能的实施方式中，所述网络设备向终端发送下行信号之后，所述方法还包括：
所述网络设备接收所述终端发送的所述第一覆盖等级。
结合第四方面的第三种可能的实施方式，在第四方面的第四种可能的实施方式中，所述网络设备接收所述终端发送的所述第一覆盖等级之后，所述方法还包括：
所述网络设备与所述终端建立业务连接，并根据所述第一覆盖等级向所述终端重复发送业务信号，以使所述终端根据所述重复发送的业务信号确定所述终端所处的第二覆盖等级；或者，
所述网络设备根据所述第一覆盖等级对所述终端进行资源调度。
结合第四方面的第二种可能的实施方式，在第四方面的第五种可能的实施方式中，当所述上行通信参数包括发送所述上行信号所采用的重复次数、信道带宽或调制编码方式时，所述方法还包括：
所述网络设备接收所述终端发送的所述上行通信参数，并根据所述上行通信参数解码所述上行信号。
第五方面，本发明实施例提供一种无线网络覆盖增强***，包括第一方面至第一方面的第八种可能的实施方式中的任一项所述的终端和第二方面至第二方面的第五种可能的实施方式中任一项所述的网络设备。
本发明实施例提供一种无线网络覆盖增强的方法、装置和***，终端根据接收到的网络设备发送的下行信号确定终端所处的第一覆盖等级，并根据该第一覆盖等级确定上行通信参数，采用该上行通信参数向网络设备发送上行信号，以实现无线网络的覆盖增强，提升了上行信号成功接收的概率，从而无需网络设备向终端发送NACK的次数，节省了终端与网络设备之间的空口开销，缩短了终端进行覆盖增强的周期，从而减小终端的耗电。此外，采用本发明实施例提供的方法，直接根据下行信号确定终端的覆盖等级，并根据覆盖等级及时有效地调整上行通信参数，进而使得终端能够及时有效地进行覆盖增强调整，提高了覆盖增强的执行效率，从而提升上行通信的性能。
附图说明
为了更清楚地说明本发明实施例或现有技术中的技术方案，下面将对实施例或现有技术描述中所需要使用的附图进行简单地介绍，显而易见地，下面描述中的附图是本发明的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附 图。
图1为本发明提供的终端实施例一的结构示意图；
图2为本发明提供的现有无线网络覆盖的示意图；
图3为本发明提供的网络设备实施例一的结构示意图；
图4为本发明提供的网络设备实施例二的结构示意图；
图5为本发明提供的终端实施例二的结构示意图；
图6为本发明提供的网络设备实施例三的结构示意图；
图7为本发明提供的网络设备实施例四的结构示意图；
图8为本发明提供的无线网络覆盖增强***实施例的结构示意图；
图9为本发明提供的无线网络覆盖增强的方法实施例一的流程示意图；
图10为本发明提供的无线网络覆盖增强的方法实施例二的流程示意图；
图11为本发明提供的无线网络覆盖增强的方法实施例三的流程示意图；
图12为本发明提供的无线网络覆盖增强的方法实施例四的流程示意图；
图13为本发明提供的无线网络覆盖增强的方法实施例五的流程示意图；
图14为本发明提供的无线网络覆盖增强的方法实施例六的流程示意图；
图15为本发明提供的无线网络覆盖增强的方法实施例七的流程示意图。
具体实施方式
为使本发明实施例的目的、技术方案和优点更加清楚，下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例是本发明一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有作出创造性劳动前提下所获得的所有其他实施例，都属于本发明保护的范围。
本发明实施例涉及的终端，即用户设备，可以是无线终端。无线终端可以是指向用户提供语音和/或数据连通性的设备，具有无线连接功能的手持式设备、或连接到无线调制解调器的其他处理设备。无线终端可以经无线接入网(例如，RAN，Radio Access Network)与一个或多个核心网进行通信，无线终端可以是移动终端，如移动电话(或称为“蜂窝”电话)和具有移动终端的计算机，例如，可以是便携式、袖珍式、手持式、计算机内置的或者车载的移动装置，它们与无线接入网交换语言和/或数据。 例如，个人通信业务(PCS，Personal Communication Service)电话、无绳电话、会话发起协议(SIP)话机、无线本地环路(WLL，Wireless Local Loop)站、个人数字助理(PDA，Personal Digital Assistant)等设备。无线终端也可以称为***、订户单元(Subscriber Unit)、订户站(Subscriber Station)，移动站(Mobile Station)、移动台(Mobile)、远程站(Remote Station)、接入点(Access Point)、远程终端(Remote Terminal)、接入终端(Access Terminal)、用户终端(User Terminal)、用户代理(User Agent)、用户设备(User Device)、或用户装备(User Equipment)。
本申请中涉及的网络设备，可以为基站，可以为接入点。基站可以是指接入网中在空中接口上通过一个或多个扇区与无线终端通信的设备。基站可用于将收到的空中帧与IP分组进行相互转换，作为无线终端与接入网的其余部分之间的路由器，其中接入网的其余部分可包括网际协议(IP)网络。基站还可协调对空中接口的属性管理。例如，基站可以是GSM或CDMA中的基站(BTS，Base Transceiver Station)，也可以是WCDMA中的基站(NodeB)，还可以是LTE中的演进型基站(NodeB或eNB或e-NodeB，evolutional Node B)，本申请并不限定。
图1为本发明提供的终端实施例一的结构示意图。如图1所示，该终端包括：接收单元10、处理单元11和发送单元12。
其中，接收单元10，用于接收网络设备发送的下行信号；处理单元11，用于根据所述下行信号，确定所述终端所处的第一覆盖等级，并根据所述第一覆盖等级，确定上行通信参数；所述发送单元12，用于根据所述处理单元11确定的上行通信参数，向网络设备发送上行信号。
具体的，网络设备向终端发送下行信号，该下行信号可以为网络设备下发的任意信号，例如广播信号、公共控制信号、业务信号等。接收单元10在接收到网络设备发送的下行信号之后，将该下行信号送给处理单元11；处理单元11根据该下行信号，确定终端所处的第一覆盖等级。可选的，处理单元11可以通过对某一时间段内的发送的下行信号进行测量或解码，确定终端所处的第一覆盖等级。
需要说明的是，第一覆盖等级用于使终端确定在当前的覆盖性能基础上 需要提升的覆盖性能大小。例如：假设终端的覆盖等级具体包括3个等级，分别是覆盖等级0、覆盖等级1和覆盖等级2，且覆盖等级0对应终端的覆盖性能需要提升0dB(即不需要提升)，覆盖等级1对应终端的覆盖性能需要提升0-10dB，覆盖等级2对应覆盖性能需要提升10-20dB。考虑到覆盖性能提升和***设计的复杂度，这里仅考虑将覆盖性能需要提升的最大值作为其覆盖性能提升的目标，即当处理单元11判断终端所处的第一覆盖等级为覆盖等级1时，根据该第一覆盖等级，确定上行通信参数，发送单元12根据处理单元11所确定的上行通信参数向网络设备发送上行信号，其覆盖性能可以提升10dB。该上行通信参数可以为终端向网络设备发送上行信号时重复的次数，还可以为终端向网络设备发送上行信号时的发射功率，还可以为终端向网络设备发送上行信号时所采用的信道带宽，还可以为终端向网络设备发送上行信号时所采用的调制编码方式等，本发明实施例对上行通信参数并不做限制，只要该参数与覆盖性能相关即可。可选的，按照上述所举的例子，当处理单元11确定终端所处的第一覆盖等级为覆盖等级1时，处理单元11可以通过所确定的上行通信参数将覆盖性能提高10dB。
可选的，可以采用最大连接损耗(Maximum Coupling Loss，以下简称MCL)值来表征无线网络的覆盖性能。参见图2，图2中MCL0表示现有网络的覆盖性能，MCL2表示网络覆盖性能需要达到的目标。以提升20dB为例，对于整个网络而言，其MCL是针对服务区域内最差的终端，也可称为边缘用户(如图2中终端D)。但对服务区域内非边缘用户而言，由于其连接损耗(Coupling Loss，以下简称CL)的值是各不相同的(如图2中终端A，B和C)，因此可以用不同终端的CL值表征其覆盖性能。例如，上述图2中，终端A的CL<MCL0时，其覆盖性能较好，因此，现有网络不做覆盖增强也可以服务终端A；终端B的MCL0<CL<MCL1时，现有网络的覆盖性能如果不做覆盖增强就无法服务终端B；终端C的MCL1<CL<MCL2，现有网络的覆盖性能如果不做覆盖增强就无法服务该终端C；对于CL>MCL2的终端，网络无法服务。
现有技术中，为了增强无线网络的覆盖性能，往往是通过HARQ或ARQ重传机制进行的，而HARQ或ARQ是基于MAC层和/或RLC层的发送机制，终端需要网络设备的ACK/NACK的应答机制来配合执行，以提成终端成功接收的可能性，该方法空***互频繁，信令开销大，并且覆盖增强的执行周期较长， 使得终端的耗电量大；另外，由于受到资源、时延和通信流程复杂度等因素的考虑重传次数一般设置不大，因此其覆盖增强的幅度有限；此外，终端不能随着所处的覆盖环境变化做出及时有效地覆盖增强调整，覆盖增强的执行效率低。但是，在本申请中，终端是根据网络设备下发的下行信号来确定自身所处的第一覆盖等级，并通过第一覆盖等级确定向网络设备发送上行信号时所采用的上行通信参数，即终端是否向网络设备重复发送上行信号或者发送上行信号的重复次数是由终端的第一覆盖等级确定的，网络设备无需向终端发送ACK/NACK反馈(即终端不用等待ACK或NACK反馈)，因此其覆盖增强的执行周期较短，减小了终端的耗电以及信令的开销；并且，灵活的重复发送次数对于无线网络的覆盖性能提升较大；此外，终端直接根据下行信号确定终端的覆盖等级，并根据覆盖等级及时有效地调整上行通信参数，进而使得终端能够及时有效地进行覆盖增强调整，提高了覆盖增强的执行效率，从而提升上行通信的性能。
本发明实施例提供的终端，通过接收单元接收网络设备发送的下行信号，处理单元根据该下行信号确定终端所处的第一覆盖等级，并根据该第一覆盖等级确定上行通信参数，发送单元根据该上行通信参数向网络设备发送上行信号，从而实现了无线网络的覆盖增强。本发明实施例提供的终端，提升了上行信号成功接收的概率，从而无需网络设备向终端发送ACK或NACK反馈，节省了终端与网络设备之间的空口开销，缩短了终端进行覆盖增强的周期，从而减小终端的耗电。此外，采用本发明实施例提供的终端，直接根据下行信号确定终端的覆盖等级，并根据覆盖等级及时有效地调整上行通信参数，进而使得终端能够及时有效地进行覆盖增强调整，提高了覆盖增强的执行效率，从而提升上行通信的性能。
进一步地，上述下行信号可以包括下行同步信道(Synchronization Channel，以下简称SCH)上传输的第一信号、公共传输信道(Common transport Channel，以下简称CCH)上传输的第二信号、广播控制信道(Broadcast Control Channel，以下简称BCCH)上传输的第三信号、用于下行同步的重复发送的序列信号、用于小区信道测量的参考信号、BCCH载波上传输的信号中的至少一种信号。
可选的，上述用于下行同步的重复发送的序列信号可以为主同步 (Primary Synchronization Signal，以下简称PSS)信号，也可以为辅同步(Secondary Synchronization Signal，以下简称SSS)信号；上述用于小区信道测量的参考信号可以为小区专属参考(Cell-specific Reference Signals，以下简称CRS)信号。
可选的，当上述下行信号包括第一信号、第二信号、第三信号、用于下行同步的重复发送的序列信号、用于小区信道测量的参考信号、BCCH载波上传输的信号中的多种信号时，终端可以根据每一个下行信号确定出一个第一覆盖等级，然后对多个第一覆盖等级进项相应的分析或计算，获得终端所处的最准确的第一覆盖等级。需要说明的是，这里对多个第一覆盖等级进项相应的分析或计算，可以为加权平均、算数平均、函数映射等任意的计算，只要能够确保得到精确的第一覆盖等级即可。
在上述图1所示实施例的基础上，作为本实施例第一种可能的实施方式，本实施例涉及的是当下行信号为上述第一信号、第二信号、第三信号中的任一种信号时，终端进行覆盖增强的具体过程。在上述实施例的基础上，上述处理单元11，具体用于当成功解码所述下行信号时，根据所述接收单元10接收到的所述下行信号的次数和第一预设关系，确定所述终端所处的所述第一覆盖等级；其中，所述第一预设关系包括所述终端成功解码所述下行信号时接收到的所述下行信号的次数与所述第一覆盖等级之间的映射关系。
具体的，假设上述下行信号为在SCH上传输的第一信号，则在上述接收单元10第一次接收到该第一信号时，将第一信号送给处理单元11；处理单元11对该第一信号进行解码，若解码成功，则确定该第一信号的重复次数为1；若不成功，则将下一个第一信号与前一次解码失败的第一信号进行软合并，再次进行解码，以此类推，直至成功解码第一信号解码为止，确定截至第一信号解码成功时接收到第一信号的次数。
处理单元11根据上述所确定的第一信号的重复次数，与第一预设关系进行匹配，以确定终端所处的第一覆盖等级。该第一预设关系可以包括多个预设阈值范围，且每个预设阈值范围对应一个覆盖等级。可选的，该第一预设关系可以为映射表的形式。此处举一个简单的例子：假设终端的覆盖等级具体包括3个等级，分别是覆盖等级0、覆盖等级1和覆盖等级2，且覆盖等级0对应覆盖性能需要提升0dB，覆盖等级1对应覆盖性能需要提升10dB，覆 盖等级2对应覆盖性能需要提升20dB，且覆盖等级0对应的预设阈值范围为“第一重复次数＝1”，覆盖等级1对应的预设阈值范围为“1＜第一重复次数≤4”，覆盖等级2对应的预设阈值范围可以为“4＜第一重复次数≤8”，具体可以参见表1所示：
表1
第一预设关系 覆盖等级 覆盖性能提升大小
第一重复次数＝1 0 0dB
1＜第一重复次数≤4 1 10dB
4＜第一重复次数≤8 2 20dB
需要说明的是，上述表1中的第一预设关系只是一种举例，本发明并不限制第一预设关系的形式或者预设阈值范围的大小。
当处理单元11确定终端所处的第一覆盖等级后，根据该第一覆盖等级确定向网络设备发送上行信号时所采用的上行通信参数。
本发明实施例提供的终端，通过接收单元接收网络设备发送的下行信号，处理单元根据成功解码时接收单元接收到的下行信号的次数和第一预设关系确定终端所处的第一覆盖等级，并根据该第一覆盖等级确定终端向网络设备发送上行信号时所采用的上行通信参数，从而使得发送单元根据该上行通信参数向网络设备发送上行信号，实现无线网络的覆盖增强。本发明实施例提供的终端，对无线网络进行覆盖增强时，通过根据终端所处的覆盖等级确定的上行通信参数向网络设备发送上行信号，避免了终端盲目通过提高重发次数来提升无线网络的覆盖性能造成的重复次数冗余，减小了终端的耗电；并且无需网络设备向终端发送ACK或NACK反馈，节省了终端与网络设备之间的空口开销。此外，采用本发明实施例提供的终端，直接根据下行信号确定终端的覆盖等级，并根据覆盖等级及时有效地调整上行通信参数，进而使得终端能够及时有效地进行覆盖增强调整，提高了覆盖增强的执行效率，从而提升上行通信的性能。
在上述图1所示实施例的基础上，作为本实施例第二种可能的实施方式，本实施例涉及的是当下行信号为用于下行同步的重复发送的序列信号时，终端进行覆盖增强的具体过程。上述用于下行同步的重复发送的序列信号(例 如：PSS信号或SSS信号)本身具有自重复的特性。本实施例的方案可以适用于新的空中接口的场景。在上述图1所示实施例的基础上，上述处理单元11，具体用于将在接收到所述下行信号的时刻对所述接收单元10接收到的所有所述下行信号进行能量累积，并将能量累积后的信号与预设的所述下行信号的参考信号进行相关得到所述下行信号的相关值，并在所述下行信号的所述相关值超过预设门限时，根据所述接收单元10接收到的所述下行信号的次数和第二预设关系，确定所述终端所处的所述第一覆盖等级；其中，所述第二预设关系包括所述下行信号的相关值超过预设门限时所述终端接收到的所述下行信号的次数与所述第一覆盖等级之间的映射关系。
具体的，以下行信号为PSS信号为例(下行信号为SSS信号可以参见下面的执行过程)，在上述接收单元10第一次接收到PSS信号时，将PSS信号送给处理单元11；处理单元11将该PSS信号与终端内部预设的PSS信号的参考信号进行相关(终端接收到的网络设备发送的PSS信号为经过无线信道的PSS信号，该PSS信号实际上已经受到信道衰减或干扰等因素影响，并不是网络设备最初发给终端的理想的PSS信号，而终端内部预设的PSS信号的参考信号为未经过无线信道的理想PSS信号)，获得PSS信号的相关值，并判断该PSS信号的相关值是否超过预设门限；当超过预设门限时，处理单元11确定PSS信号的重复次数为1，当没有超过门限，则处理单元11将接收到的下一个PSS信号和之前的PSS信号进行能量累积，并计算累积后的PSS信号的相关值(即将累积后的PCC信号与终端内部预设的PSS信号的参考信号进行相关)，判断该相关值是否超过预设门限，以此类推，直至处理单元11判断PSS信号的相关值超过预设门限时，确定截至PSS信号的相关值大于预设门限时的接收到PSS信号的次数。
处理单元11将上述确定的PSS信号的相关值大于预设门限时接收单元10接收到PSS信号的次数与第二预设关系进行匹配，以确定终端所处的第一覆盖等级。该第二预设关系可以包括多个预设阈值范围，且每个预设阈值范围对应一个覆盖等级。可选的，该第二预设关系可以为映射表的形式。此处举一个简单的例子：假设终端的覆盖等级具体可以包括3个等级，分别是覆盖等级0、覆盖等级1和覆盖等级2，且覆盖等级0对应覆盖性能需要提升0dB，覆盖等级1对应覆盖性能需要提升10dB，覆盖等级2对应覆盖性能需 要提升20dB，且覆盖等级0对应的预设阈值范围为“第二重复次数＝1”，覆盖等级1对应的预设阈值范围为“1＜第二重复次数≤4”，覆盖等级2对应的预设阈值范围可以为“4＜第二重复次数≤8”，具体可以参见表2所示：
表2
第二预设关系 覆盖等级 覆盖性能提升大小
第二重复次数＝1 0 0dB
1＜第二重复次数≤4 1 10dB
4＜第二重复次数≤8 2 20dB
需要说明的是，上述表2中的第二预设关系只是一种举例，本发明并不限制第二预设关系的形式或者预设阈值范围的大小。
当处理单元11确定终端所处的第一覆盖等级后，根据该第一覆盖等级确定向网络设备发送上行信号时所采用的上行通信参数。
本发明实施例提供的终端，通过接收单元接收网络设备发送的下行信号，处理单元根据下行信号的相关值超过预设门限时接收单元接收到的下行信号的次数和第二预设关系确定终端所处的第一覆盖等级，并根据该第一覆盖等级确定终端向网络设备发送上行信号时所采用的上行通信参数，从而使得发送单元根据该上行通信参数向网络设备发送上行信号，实现无线网络的覆盖增强。本发明实施例提供的终端，对无线网络进行覆盖增强时，通过根据终端所处的覆盖等级确定的上行通信参数向网络设备发送上行信号，避免了终端盲目通过提高重发次数来提升无线网络的覆盖性能造成的重复次数冗余，减小了终端的耗电；并且无需网络设备向终端发送ACK或NACK反馈，节省了终端与网络设备之间的空口开销。此外，采用本发明实施例提供的终端，直接根据下行信号确定终端的覆盖等级，并根据覆盖等级及时有效地调整上行通信参数，进而使得终端能够及时有效地进行覆盖增强调整，提高了覆盖增强的执行效率，从而提升上行通信的性能。
在上述图1所示实施例的基础上，作为本实施例第三种可能的实施方式，本实施例涉及的是当下行信号为BCCH载波上传输的信号时，终端进行覆盖增强的具体过程。在上述图1所示实施例的基础上，上述处理单元11，具体用于测量所述接收单元10在预设时间段内接收到的所述下行信号的信号接收 强度，并根据在所述预设时间段内测量的所述下行信号的信号接收强度，确定第一信号接收强度，并根据所述第一信号接收强度以及第三预设关系，确定所述终端所处的所述第一覆盖等级；其中，所述第三预设关系包括所述第一信号接收强度与所述第一覆盖等级之间的映射关系。
具体的，网络设备在预设时间段内向终端发送在BCCH载波上传输的信号，即该信号是承载在BCCH中发送给终端的。接收单元10将接收到的BCCH载波上传输的信号传送给处理单元11，处理单元11测量这些在BCCH载波上传输的信号的信号接收强度，并根据这些BCCH载波上传输的信号的信号接收强度计算得到第一信号接收强度。可选的，该第一信号接收强度可以为BCCH载波上传输的信号的平均信号接收强度，还可以为处理单元11对上述预设时间段内的所有BCCH载波上传输的信号的信号接收强度进行任一种计算得到的信号接收强度。
处理单元11将上述所确定的第一信号接收强度与第三预设关系进行匹配，以确定终端所处的第一覆盖等级。该第三预设关系可以包括多个预设阈值范围，且每个预设阈值范围对应一个覆盖等级。可选的，该第三预设关系可以为映射表的形式。假设终端的覆盖等级具体可以包括3个等级，分别是覆盖等级0、覆盖等级1和覆盖等级2，且覆盖等级0对应覆盖性能需要提升0dB，覆盖等级1对应覆盖性能需要提升10dB，覆盖等级2对应覆盖性能需要提升20dB，且覆盖等级0对应的预设阈值范围为A，覆盖等级1对应的预设阈值范围为B，覆盖等级2对应的预设阈值范围可以为C，具体可以参见表3所示：
表3
第三预设关系 覆盖等级 覆盖性能提升大小
A 0 0dB
B 1 10dB
C 2 20dB
需要说明的是，上述表3中的第三预设关系只是一种举例，本发明并不限制第三预设关系的形式或者预设阈值范围的大小。
当处理单元11确定终端所处的第一覆盖等级后，根据该第一覆盖等级确定向网络设备发送上行信号时所采用的上行通信参数。
本发明实施例提供的终端，通过接收单元接收网络设备发送的下行信号，处理单元通过测量在预设时间段内接收到的每个下行信号的信号接收强度获取这些下行信号的第一信号接收强度，并根据该第一信号接收强度和第三预设关系确定终端所处的第一覆盖等级，从而根据该第一覆盖等级确定终端向网络设备发送上行信号时所采用的上行通信参数，使得发送单元根据该上行通信参数向网络设备发送上行信号，实现无线网络的覆盖增强。本发明实施例提供的终端，对无线网络进行覆盖增强时，通过根据终端所处的覆盖等级确定的上行通信参数向网络设备发送上行信号，避免了终端盲目通过提高重发次数来提升无线网络的覆盖性能造成的重复次数冗余，减小了终端的耗电；并且无需网络设备向终端发送ACK或NACK反馈，节省了终端与网络设备之间的空口开销。此外，采用本发明实施例提供的终端，直接根据下行信号确定终端的覆盖等级，并根据覆盖等级及时有效地调整上行通信参数，进而使得终端能够及时有效地进行覆盖增强调整，提高了覆盖增强的执行效率，从而提升上行通信的性能。
在上述图1所示实施例的基础上，作为本实施例第四种可能的实施方式，本实施例涉及的是当下行信号为用于小区信道测量的参考信号时，终端进行覆盖增强的具体过程。在上述图1所示实施例的基础上，上述处理单元11具体用于根据所述接收单元10在预设时间段内接收到的所述下行信号，测量所述终端与所述网络设备之间的路径损耗，并根据所述预设时间段内测量的所有路径损耗，确定所述终端与所述网络设备之间的第一路径损耗，并根据所述第一路径损耗和第四预设关系，确定所述终端所处的所述第一覆盖等级；其中，所述第四预设关系包括所述第一路径损耗与所述第一覆盖等级之间的映射关系。
具体的，以上述CRS信号为例，网络设备在预设时间段内，重复向终端发送CRS信号；接收单元10将接收到的每个CRS信号均送给处理单元11；处理单元11根据接收单元10在预设时间段内接收到的每个CRS信号测量终端与网络设备之间的路径损耗(一个CRS信号对应一个路径损耗)，并根据这些路径损耗计算得到终端与网络设备之间的第一路径损耗，可选的，该第一路径损耗可以为终端与网络设备之间的平均路径损耗，还可以为处理单元 11对上述预设时间段内终端与网络设备之间所有的路径损耗进行任一种计算得到的路径损耗。
处理单元11将上述所确定的第一路径损耗与第四预设关系进行匹配，以确定终端所处的第一覆盖等级。该第四预设关系可以包括多个预设阈值范围，且每个预设阈值范围对应不同的覆盖等级。可选的，该第四预设关系可以为映射表的形式。假设终端的覆盖等级具体可以包括3个等级，分别是覆盖等级0、覆盖等级1和覆盖等级2，且覆盖等级0对应覆盖性能需要提升0dB，覆盖等级1对应覆盖性能需要提升10dB，覆盖等级2对应覆盖性能需要提升20dB，且覆盖等级0对应的预设阈值范围为D，覆盖等级1对应的预设阈值范围为E，覆盖等级2对应的预设阈值范围可以为F，具体可以参见表4所示：
表4
第三预设关系 覆盖等级 覆盖性能提升大小
D 0 0dB
E 1 10dB
F 2 20dB
需要说明的是，上述表4中的第四预设关系只是一种举例，本发明并不限制第四预设关系的形式或者预设阈值范围的大小。
当处理单元11确定终端所处的第一覆盖等级后，根据该第一覆盖等级确定向网络设备发送上行信号时所采用的上行通信参数。
本发明实施例提供的终端，通过接收单元接收网络设备发送的下行信号，处理单元根据接收单元在预设时间段内接收到的每个CRS信号测量终端与网络设备之间的路径损耗，获取终端与网络设备之间的第一路径损耗，并根据该第一路径损耗和第四预设关系确定终端所处的第一覆盖等级，以根据该第一覆盖等级确定终端向网络设备发送上行信号时所采用的上行通信参数，使得发送单元根据该上行通信参数向网络设备发送上行信号，从而实现无线网络的覆盖增强。本发明实施例提供的终端，对无线网络进行覆盖增强时，通过根据终端所处的覆盖等级确定的上行通信参数向网络设备发送上行信号，避免了终端盲目通过提高重发次数来提升无线网络的覆盖性能造成的重复次数冗余，减小了终端的耗电；并且无需网络设备向终端发送ACK或NACK反馈，节省了终端与网络设备之间的空口开销。此外，采用本发明实施例提供的终 端，直接根据下行信号确定终端的覆盖等级，并根据覆盖等级及时有效地调整上行通信参数，进而使得终端能够及时有效地进行覆盖增强调整，提高了覆盖增强的执行效率，从而提升上行通信的性能。
在上述任一实施例的基础上，作为本发明实施例第五种可能的实施方式，本实施例涉及的是终端将所确定的第一覆盖等级发送给网络设备，以使网络设备对终端进行合理的资源调度的具体过程。上述发送单元12，还用于将所述第一覆盖等级发送给所述网络设备。
具体的，在上述处理单元11根据下行信号确定出终端所处的第一覆盖等级之后，通过发送单元12将该第一覆盖等级发送给网络设备。可选的，可以是直接将第一覆盖等级以显式的方式(直接以消息信元的方式)发送给网络设备，还可以将第一覆盖等级携带在某种物理信号中，以隐式的方式发送给网络设备。可选的，显示发送方式中可以通过随机接入信道(Random Access Channel，以下简称RACH)上发送的信道请求消息将该第一覆盖等级发送给网络设备。隐式的发送方式中，终端可以通过上行信号重复发送的次数，或者其他物理层处理(如符号旋转、信号循环移位、特殊序列的加入或扰码等方式)携带第一覆盖等级信息。
网络设备在接收到第一覆盖等级之后，对该终端的上下行资源进行合理的资源调度。
本发明实施例提供的终端，在处理单元根据下行信号确定出终端所处的第一覆盖等级之后，通过发送单元将该第一覆盖等级发送给网络设备，使得网络设备对终端的上下行资源调度更准确，提高了资源利用率。
在上述任一实施例的基础上，作为本发明实施例第六种可能的实施方式，本实施例涉及的是终端更新覆盖等级的具体过程。进一步地，上述处理单元11，还用于与所述网络设备建立业务连接；所述接收单元10，还用于接收所述网络设备重复发送的业务信号；其中，所述业务信号的重复次数为所述网络设备根据所述终端所处的所述第一覆盖等级确定的；所述处理单元11，还用于根据成功解码所述业务信号时接收到的所述业务信号的次数和第五预设关系，确定所述终端所处的第二覆盖等级；其中，所述第五预设关系包括所 述终端成功解码所述业务信号时接收到的所述业务信号的次数和所述第二覆盖等级之间的映射关系。
具体的，上述任一实施例中，终端确定自己所处的第一覆盖等级之后，才与网络设备进行业务信道的通信。上述业务信号可以为下行数据信号。
接收单元10接收网络设备重复发送的业务信号，该业务信号的重复次数为网络设备根据上述发送单元12上报的终端所处的第一覆盖等级确定的，假设为n，即终端本身的第一覆盖等级决定了终端需要业务信号重复n次才可以解码成功，因此网络设备发送业务信号的次数为n。接收单元10将接收到的业务信号均会送给处理单元11。处理单元11对业务信号进行解码，当解码成功时，处理单元记录截至解码成功时业务信号的重复次数，假设为m(m小于n)，即终端此时仅需要m次就可以将业务信号解码成功。因此，处理单元11根据解码成功时业务信号的重复次数(即m)与第五预设关系进行匹配，确定终端所处的第二覆盖等级，以将终端原来的第一覆盖等级更新为第二覆盖等级。可选的，终端还可以通过发送单元12将该第二覆盖等级发送给网络设备，使得网络设备根据该第二覆盖等级为终端分配合理的资源，避免冗余发送造成的资源浪费。可选的，终端还可以根据第二覆盖等级及时调整与网络设备进行业务通信时所采用的重复次数或信道带宽或发射功率或调制编码方式等上行通信参数。
本发明实施例提供的终端，通过接收单元接收网络设备重复发送的业务信号，该业务信号的重复次数为网络设备根据终端所处的第一覆盖等级确定的；处理单元根据成功解码时所述业务信号的次数和第五预设关系确定终端所处的第二覆盖等级。本发明实施例提供的终端，通过及时更新终端所处的覆盖等级，并根据更新后的覆盖等级及时有效地调整上行通信参数，进而使得终端能够及时有效地进行覆盖增强调整，提高了覆盖增强的执行效率，从而提升上行通信的性能。
可选地，在上述任一实施例的基础上，上述终端根据自己所处的第一覆盖等级确定的上行通信参数可以为终端发送所述上行信号时所采用的重复次数、信道带宽、发射功率和调制编码方式中的至少一种。
需要说明的是，因为终端与网络设备进行通信可以采用多种信道带宽， 因此，这里处理单元11根据上述第一覆盖等级确定的是终端向网络设备发送上行信号时所采用的信道带宽，使得发送单元12可以以预设的重复次数采用确定的信道带宽向网络设备发送上行信号，该预设的重复次数与确定的终端发送上行信号所采用的信道带宽存在对应关系。例如，当发送单元12发送上行信号所采用的信道带宽越窄时，由于信道带宽越窄，发送单元12所发送的上行信号的能量越集中，因此该预设的重复次数就越小，故终端能够以一个较合适的重复次数向网络设备发送上行信号，节省了终端的信令开销。
另一方面，处理单元11还可以根据上述所确定的第一覆盖等级确定终端向网络设备发送上行信号时所采用的信道带宽和重复次数，即处理单元11根据第一覆盖等级同时确定出适于终端发送上行信号采用的信道带宽和重复次数，这里所确定的信道带宽和重复次数是处理单元11根据第一覆盖等级、重复次数以及信道带宽综合考虑的。例如：处理单元11可以根据第一覆盖等级确定一个重复次数A，也可以根据该第一覆盖等级确定一信道带宽B，但是处理单元11可以根据无线网络中实际的无线环境(例如：信道的快慢衰落、信道噪声等)对所确定的重复次数A、信道带宽B加以微调，选择一个合理的信道带宽a和重复次数b，在信道带宽a上以重复次数b发送上行信号。该方法终端也无需重复很多次向网络设备发送上行信号，节省了终端的信令开销。
另一方面，本发明实施例中的终端与网络设备进行通信时可以采用多种调制编码方式。处理单元11根据上述第一覆盖等级确定终端向网络设备发送上行信号时所采用的调制编码方式。例如，终端确定的第一覆盖等级越高时，即说明终端当前所处的无线信道环境较差，需要将当前的覆盖性能提升较大的幅度，则终端采用低阶的调制方式以及冗余度较高的编码方式，避免终端采用不合适的调制编码方式造成的冗余发送，节省了终端的信令开销。
本实施例提供的终端，使得终端在上行通信时可以采用适于终端发送上行信号的上行通信参数，节省了终端的信令开销。
图3为本发明提供的网络设备实施例一的结构示意图。如图3所示，该网络设备包括：发送单元21和接收单元22。其中，发送单元21，用于向终端发送下行信号；接收单元22，用于接收所述终端根据自身所确定的上行通 信参数发送的上行信号；其中，所述上行通信参数为所述终端根据所述第一覆盖等级确定的，所述第一覆盖等级为所述终端根据所述下行信号确定的。
具体的，发送单元21向终端发送下行信号，该下行信号可以为网络设备下发的任意信号，例如广播信号、公共控制信号、业务信号等。终端在接收到网络设备发送的下行信号之后，根据该下行信号判断终端所处的第一覆盖等级。可选的，终端可以通过对某一时间段内的重复发送的下行信号的测量或解码确定终端所处的第一覆盖等级。
上述第一覆盖等级可以与覆盖性能需要提升的值相对应，例如：假设终端的覆盖等级具体可以包括3个等级，分别是覆盖等级0、覆盖等级1和覆盖等级2，且覆盖等级0对应覆盖性能需要提升0dB(即不需要提升)，覆盖等级1对应覆盖性能需要提升0-10dB，覆盖等级2对应覆盖性能需要提升10-20dB。考虑到覆盖性能提升和***设计的复杂度，这里仅考虑将覆盖性能需要提升的最大值作为其覆盖性能提升的目标，即当终端判断自己所处的第一覆盖等级为覆盖等级1时，可以根据该第一覆盖等级确定上行通信参数进行配置，使得接收单元22可以接收到终端根据该上行通信参数发送的上行信号，从而使得覆盖性能可以提升10dB。该上行通信参数可以为终端向网络设备发送上行信号时重复的次数，还可以为终端向网络设备发送上行信号时的功率，还可以为终端向网络设备发送上行信号时所采用的信号带宽，还可以为终端向网络设备发送上行信号时所采用的调制编码方式等，本发明实施例对上行通信参数并不做限制，只要该参数与覆盖性能相关即可。可选的，按照上述所举的例子，当终端判断自身所处的第一覆盖等级为覆盖等级1时，可以将覆盖性能提高10dB。
现有技术中，为了增强无线网络的覆盖性能，往往是通过HARQ或ARQ重传机制进行的，而HARQ或ARQ是基于MAC层和/或RLC层的发送机制，终端需要网络设备的ACK/NACK的应答机制来配合执行，以提成终端成功接收的可能性，该方法空***互频繁，信令开销大，并且覆盖增强的执行周期较长，使得终端的耗电量大；另外，由于受到资源、时延和通信流程复杂度等因素的考虑重传次数一般设置不大，因此其覆盖增强的幅度有限；此外，终端不能随着所处的覆盖环境变化做出及时有效地覆盖增强调整，覆盖增强的执行效率低。但是，在本申请中，终端是根据网络设备下发的下行信号来确定自 身所处的第一覆盖等级，并通过第一覆盖等级确定向网络设备发送上行信号时所采用的上行通信参数，即终端是否向网络设备重复发送上行信号或者发送上行信号的重复次数是由终端的第一覆盖等级确定的，网络设备无需向终端发送ACK/NACK反馈(即终端不用等待ACK或NACK反馈)，因此其覆盖增强的执行周期较短，减小了终端的耗电以及信令的开销；并且，灵活的重复发送次数对于无线网络的覆盖性能提升较大；此外，终端直接根据下行信号确定终端的覆盖等级，并根据覆盖等级及时有效地调整上行通信参数，进而使得终端能够及时有效地进行覆盖增强调整，提高了覆盖增强的执行效率，从而提升上行通信的性能。
本发明实施例提供的网络设备，通过发送单元向终端发送下行信号，使得终端根据该下行信号判断自身所处的第一覆盖等级，并根据该第一覆盖等级确定上行通信参数，从而使得接收单元可以接收到终端根据所确定的上行通信参数发送的上行信号，进而实现无线网络的覆盖增强。本发明实施例提供的网络设备，提升了上行信号成功接收的概率，从而无需网络设备向终端发送ACK或NACK反馈，节省了终端与网络设备之间的空口开销，缩短了终端进行覆盖增强的周期，从而减小了终端的耗电。此外，采用本发明实施例提供的终端，直接根据下行信号确定终端的覆盖等级，并根据覆盖等级及时有效地调整上行通信参数，进而使得终端能够及时有效地进行覆盖增强调整，提高了覆盖增强的执行效率，从而提升上行通信的性能。
进一步地，上述下行信号包括：SCH信道上传输的第一信号、CCH信道上传输的第二信号、BCCH上传输的第三信号、用于下行同步的重复发送的序列信号、用于小区信道测量的参考信号、BCCH载波上传输的信号中的其中一种信号。
可选的，上述用于下行同步的重复发送的序列信号可以为PSS信号，还可以为SSS信号；上述用于小区信道测量的参考信号可以为CRS信号。
进一步地，上述上行通信参数可以为：所述终端发送所述上行信号所采用的重复次数、信道带宽、发射功率和调制编码方式。
需要说明的是，因为终端与网络设备进行通信可以采用多种信道带宽，因此，这里终端根据上述第一覆盖等级确定的是终端向网络设备发送上行信号时所采用的信道带宽，使得终端可以以预设的重复次数采用确定的信道带 宽向网络设备发送上行信号，该预设的重复次数与确定的终端发送上行信号所采用的信道带宽存在对应关系。例如，当终端发送上行信号所采用的信道带宽越窄时，由于信道带宽越窄，终端所发送的上行信号的能量越集中，因此该预设的重复次数就越小，故终端能够以一个较合适的重复次数向网络设备发送上行信号，节省了终端的信令开销。
另一方面，终端还可以根据上述所确定的第一覆盖等级确定终端向网络设备发送上行信号时所采用的信道带宽和重复次数，即终端根据第一覆盖等级同时确定出适于终端发送上行信号采用的信道带宽和重复次数，这里所确定的信道带宽和重复次数是终端根据第一覆盖等级、重复次数以及信道带宽综合考虑的。例如：终端可以根据第一覆盖等级确定一个重复次数A，也可以根据该第一覆盖等级确定一信道带宽B，但是终端可以根据无线网络中实际的无线环境(例如：信道的快慢衰落、信道噪声等)对所确定的重复次数A、信道带宽B加以微调，选择一个合理的信道带宽a和重复次数b，在信道带宽a上以重复次数b发送上行信号。该方法终端也无需重复很多次向网络设备发送上行信号，节省了终端的信令开销。
另一方面，本发明实施例中的终端与网络设备进行通信时可以采用多种调制编码方式。终端根据上述第一覆盖等级确定终端向网络设备发送上行信号时所采用的调制编码方式。例如，终端确定的第一覆盖等级越高时，即说明终端当前所处的无线信道环境较差，需要将当前的覆盖性能提升较大的幅度，则终端采用低阶的调制方式以及冗余度较高的编码方式，避免终端采用不合适的调制编码方式造成的冗余发送，节省了终端的信令开销。
本实施例提供的网络设备，使得终端可以根据网络设备下发的下行信号确定第一覆盖等级，并根据该第一覆盖等级确定在上行通信时终端可以采用适于终端发送上行信号的上行通信参数，节省了终端的信令开销。
图4为本发明提供的网络设备实施例二的结构示意图。在上述实施例的基础上，本实施例涉及的是网络设备接收终端发送的第一覆盖等级，并根据该第一覆盖等级对终端进行资源调度的具体过程。进一步地，上述网络设备还可以包括处理单元23。上述接收单元22，还用于接收所述终端发送的所述第一覆盖等级；上述处理单元23，用于在所述接收单元22接收所述终端发 送的所述第一覆盖等级之后，根据所述第一覆盖等级对所述终端进行资源调度.
具体的，上述终端确定出自身所处的第一覆盖等级之后，将该第一覆盖等级发送给网络设备，接收单元22接收该第一覆盖等级，使得处理单元23可以根据该第一覆盖等级计算出上行或下行资源，对终端进行合理的资源调度。可选的，网络设备可以向终端发送一调度信息，该调度信息中可以包括上行或下行资源大小，使得终端获知进行上行通信时应该采用的时频资源大小。可选的，终端可以是直接将第一覆盖等级以显式的方式(直接以消息信元的方式)发送给网络设备，还可以将第一覆盖等级携带在某种物理信号特征中，以隐式的方式发送给网络设备。可选的，显示发送方式中可以通过RACH上发送的信道请求消息将该第一覆盖等级发送给网络设备。隐式的发送方式中，终端可以通过上行重复发送的次数，或者其他物理层处理(如符号旋转、信号循环移位、特殊序列的加入或扰码等方式)携带第一覆盖等级信息。
本发明实施例提供的网络设备，通过接收单元接收终端发送的第一覆盖等级，处理单元根据该第一覆盖等级对终端进行资源调度，使得网络设备对终端的上下行资源调度更准确，提高了资源利用率。
继续参照图4，在上述实施例的基础上，本实施例涉及的是网络设备与终端建立业务连接，通过向终端发送业务信号，使得终端及时更新自身的覆盖等级的具体过程。进一步地，上述处理单元23，还用于在所述接收单元22接收所述终端发送的所述第一覆盖等级之后，与所述终端建立业务连接；则上述发送单元21，还用于根据所述第一覆盖等级向所述终端重复发送业务信号，以使所述终端根据所述重复发送的业务信号确定所述终端所处的第二覆盖等级。
具体的，上述任一实施例中，处理单元23在接收单元22接收到终端发送的第一覆盖等级之后，才与终端建立业务通信。
发送单元21根据接收单元22接收到的第一覆盖等级向终端重复发送业务信号，该业务信号可以为下行数据信号、下行语音信号、下行视频信号等等，并且该业务信号的重复次数为处理单元23根据终端上报的第一覆盖等级确定的，假设为n，即终端本身的第一覆盖等级决定了终端需要网络设备下 发n次业务信号才可以解码成功，因此处理单元23根据接收单元22接收到的第一覆盖等级确定发送业务信号的次数为n。终端对业务信号进行解码，当解码成功时，终端确定截至解码成功时业务信号的重复次数，假设为m(m小于n)，即终端此时仅需要网络设备下发m次业务信号就可以将业务信号解码成功。因此，终端根据解码成功时业务信号的重复次数(即m)与第五预设关系进行匹配，确定终端所处的第二覆盖等级，以将终端原来的第一覆盖等级更新为第二覆盖等级。可选的，终端还可以将该第二覆盖等级发送给网络设备，使得网络设备根据该第二覆盖等级为终端分配合理的资源，避免冗余发送造成的资源浪费。可选的，终端还可以根据第二覆盖等级及时调整与网络设备进行业务通信时所采用的重复次数或信道带宽或发射功率或调制编码方式等上行通信参数。
本发明实施例提供的网络设备，通过处理单元在接收单元接收到终端发送的第一覆盖等级之后，与终端建立业务通信；发送单元根据该第一覆盖等级向终端重复发送业务信号，以使终端根据该重复发送的业务信号确定终端所处的第二覆盖等级。本发明实施例提供的网络设备，通过及时更新终端所处的覆盖等级，并根据更新后的覆盖等级及时有效地调整上行通信参数，进而使得终端能够及时有效地进行覆盖增强调整，提高了覆盖增强的执行效率，从而提升上行通信的性能。
进一步地，在上述图4所示实施例的基础上，当所述上行通信参数包括终端发送所述上行信号所采用的重复次数、信道带宽或调制编码方式时，上述接收单元22，还用于接收所述终端发送的所述上行通信参数；上述处理单元23，还用于根据所述上行通信参数解码所述上行信号。
可选的，当上述上行通信参数为终端发送上行信号所采用的重复次数时，网络设备可以根据该上行通信参数获知需要将终端发送的上行信号解码多少次才可以将上行信号解码成功，避免了网络设备的重复解码，节省了网络设备的处理开销。
可选的，当上述上行通信参数为终端发送上行信号所采用的信道带宽或调制编码方式时，网络设备可以明确知道采用哪一种信道带宽或哪一种调制编码方式对上行信号进行解码，避免了网络设备盲目检测(即网络设备在不知道解码所用的信道带宽或调制编码方式时，会将终端所采用的所有信道带 宽或调制编码方式进行解码检测，即终端的盲目检测)，节省了网络设备的处理开销，降低了网络设备的解码复杂度。
本发明实施例提供的网络设备，通过接收单元接收终端发送上行信号所采用的重复次数或信道带宽或调制编码方式，使得处理单元可以根据终端上行信号所采用的重复次数或信道带宽或调制编码方式对上行信号进行准确解码，降低了网络设备解码时的处理开销和复杂度。
图5为本发明提供的终端实施例二的结构示意图。如图5所示，该终端包括：接收器30、处理器31和发送器32。
其中，接收器30，用于接收网络设备发送的下行信号；处理器31，用于根据所述下行信号，确定所述终端所处的第一覆盖等级，并根据所述第一覆盖等级，确定上行通信参数；所述发送器32，用于根据所述处理器31确定的上行通信参数，向网络设备发送上行信号。
具体的，网络设备向终端发送下行信号，该下行信号可以为网络设备下发的任意信号，例如广播信号、公共控制信号、业务信号等。接收器30在接收到网络设备发送的下行信号之后，将该下行信号送给处理器31；处理器31根据该下行信号，确定终端所处的第一覆盖等级。可选的，处理器31可以通过对某一时间段内的发送的下行信号进行测量或解码，确定终端所处的第一覆盖等级。
需要说明的是，第一覆盖等级用于使终端确定在当前的覆盖性能基础上需要提升的覆盖性能大小。例如：假设终端的覆盖等级具体包括3个等级，分别是覆盖等级0、覆盖等级1和覆盖等级2，且覆盖等级0对应终端的覆盖性能需要提升0dB(即不需要提升)，覆盖等级1对应终端的覆盖性能需要提升0-10dB，覆盖等级2对应覆盖性能需要提升10-20dB。考虑到覆盖性能提升和***设计的复杂度，这里仅考虑将覆盖性能需要提升的最大值作为其覆盖性能提升的目标，即当处理器31判断终端所处的第一覆盖等级为覆盖等级1时，根据该第一覆盖等级，确定上行通信参数，发送器32根据处理器31所确定的上行通信参数向网络设备发送上行信号，其覆盖性能可以提升10dB。该上行通信参数可以为终端向网络设备发送上行信号时重复的次数，还可以为终端向网络设备发送上行信号时的发射功率，还可以为终端向网络 设备发送上行信号时所采用的信道带宽，还可以为终端向网络设备发送上行信号时所采用的调制编码方式等，本发明实施例对上行通信参数并不做限制，只要该参数与覆盖性能相关即可。可选的，按照上述所举的例子，当处理器31确定终端所处的第一覆盖等级为覆盖等级1时，处理器31可以通过所确定的上行通信参数将覆盖性能提高10dB。
现有技术中，为了增强无线网络的覆盖性能，往往是通过HARQ或ARQ重传机制进行的，而HARQ或ARQ是基于MAC层和/或RLC层的发送机制，终端需要网络设备的ACK/NACK的应答机制来配合执行，以提成终端成功接收的可能性，该方法空***互频繁，信令开销大，并且覆盖增强的执行周期较长，使得终端的耗电量大；另外，由于受到资源、时延和通信流程复杂度等因素的考虑重传次数一般设置不大，因此其覆盖增强的幅度有限；此外，终端不能随着所处的覆盖环境变化做出及时有效地覆盖增强调整，覆盖增强的执行效率低。但是，在本申请中，终端是根据网络设备下发的下行信号来确定自身所处的第一覆盖等级，并通过第一覆盖等级确定向网络设备发送上行信号时所采用的上行通信参数，即终端是否向网络设备重复发送上行信号或者发送上行信号的重复次数是由终端的第一覆盖等级确定的，网络设备无需向终端发送ACK/NACK反馈(即终端不用等待ACK或NACK反馈)，因此其覆盖增强的执行周期较短，减小了终端的耗电以及信令的开销；并且，灵活的重复发送次数对于无线网络的覆盖性能提升较大；此外，终端直接根据下行信号确定终端的覆盖等级，并根据覆盖等级及时有效地调整上行通信参数，进而使得终端能够及时有效地进行覆盖增强调整，提高了覆盖增强的执行效率，从而提升上行通信的性能。
本发明实施例提供的终端，通过接收器接收网络设备发送的下行信号，处理器根据该下行信号确定终端所处的第一覆盖等级，并根据该第一覆盖等级确定上行通信参数，发送器根据该上行通信参数向网络设备发送上行信号，从而实现了无线网络的覆盖增强。本发明实施例提供的终端，提升了上行信号成功接收的概率，从而无需网络设备向终端发送ACK或NACK反馈，节省了终端与网络设备之间的空口开销，缩短了终端进行覆盖增强的周期，从而减小了终端的耗电。此外，采用本发明实施例提供的终端，直接根据下行信号确定终端的覆盖等级，并根据覆盖等级及时有效地调整上行通信参数，进而 使得终端能够及时有效地进行覆盖增强调整，提高了覆盖增强的执行效率，从而提升上行通信的性能。
进一步地，上述下行信号可以包括下行同步信道(Synchronization Channel，以下简称SCH)上传输的第一信号、公共传输信道(Common transport Channel，以下简称CCH)上传输的第二信号、广播控制信道(Broadcast Control Channel，以下简称BCCH)上传输的第三信号、用于下行同步的重复发送的序列信号、用于小区信道测量的参考信号、BCCH载波上传输的信号中的至少一种信号。
可选的，上述用于下行同步的重复发送的序列信号可以为主同步(Primary Synchronization Signal，以下简称PSS)信号，也可以为辅同步(Secondary Synchronization Signal，以下简称SSS)信号；上述用于小区信道测量的参考信号可以为小区专属参考(Cell-specific Reference Signals，以下简称CRS)信号。
可选的，当上述下行信号包括第一信号、第二信号、第三信号、用于下行同步的重复发送的序列信号、用于小区信道测量的参考信号、BCCH载波上传输的信号中的多种信号时，终端可以根据每一个下行信号确定出一个第一覆盖等级，然后对多个第一覆盖等级进项相应的分析或计算，获得终端所处的最准确的第一覆盖等级。需要说明的是，这里对多个第一覆盖等级进项相应的分析或计算，可以为加权平均、算数平均、函数映射等任意的计算，只要能够确保得到精确的第一覆盖等级即可。
在上述图5所示实施例的基础上，作为本实施例第一种可能的实施方式，本实施例涉及的是当下行信号为上述第一信号、第二信号、第三信号中的任一种信号时，终端进行覆盖增强的具体过程。在上述实施例的基础上，上述处理器31，具体用于当成功解码所述下行信号时，根据所述接收器30接收到的所述下行信号的次数和第一预设关系，确定所述终端所处的所述第一覆盖等级；其中，所述第一预设关系包括所述终端成功解码所述下行信号时接收到的所述下行信号的次数与所述第一覆盖等级之间的映射关系。
具体的，假设上述下行信号为在SCH上传输的第一信号，则在上述接收器30第一次接收到该第一信号时，将第一信号送给处理器31；处理器31对该第一信号进行解码，若解码成功，则确定该第一信号的重复次数为1；若 不成功，则将下一个第一信号与前一次解码失败的第一信号进行软合并，再次进行解码，以此类推，直至成功解码第一信号解码为止，确定截至第一信号解码成功时接收到第一信号的次数。
处理器31根据上述所确定的第一信号的重复次数，与第一预设关系进行匹配，以确定终端所处的第一覆盖等级。该第一预设关系可以包括多个预设阈值范围，且每个预设阈值范围对应一个覆盖等级。可选的，该第一预设关系可以为映射表的形式，具体可以参见上述表1所示的例子，在此不再赘述。当处理器31确定终端所处的第一覆盖等级后，根据该第一覆盖等级确定向网络设备发送上行信号时所采用的上行通信参数。
本发明实施例提供的终端，通过接收器接收网络设备发送的下行信号，处理器根据成功解码时接收器接收到的下行信号的次数和第一预设关系确定终端所处的第一覆盖等级，并根据该第一覆盖等级确定终端向网络设备发送上行信号时所采用的上行通信参数，从而使得发送器根据该上行通信参数向网络设备发送上行信号，实现无线网络的覆盖增强。本发明实施例提供的终端，对无线网络进行覆盖增强时，通过根据终端所处的覆盖等级确定的上行通信参数向网络设备发送上行信号，避免了终端盲目通过提高重发次数来提升无线网络的覆盖性能造成的重复次数冗余，减小了终端的耗电；并且无需网络设备向终端发送ACK或NACK反馈，节省了终端与网络设备之间的空口开销。此外，采用本发明实施例提供的终端，直接根据下行信号确定终端的覆盖等级，并根据覆盖等级及时有效地调整上行通信参数，进而使得终端能够及时有效地进行覆盖增强调整，提高了覆盖增强的执行效率，从而提升上行通信的性能。
在上述图5所示实施例的基础上，作为本实施例第二种可能的实施方式，本实施例涉及的是当下行信号为用于下行同步的重复发送的序列信号时，终端进行覆盖增强的具体过程。上述用于下行同步的重复发送的序列信号(例如：PSS信号或SSS信号)本身具有自重复的特性。本实施例的方案可以适用于新的空中接口的场景。在上述图1所示实施例的基础上，上述处理器31，具体用于将在接收到所述下行信号的时刻对所述接收器30接收到的所有所述下行信号进行能量累积，并将能量累积后的信号与预设的所述下行信号的 参考信号进行相关得到所述下行信号的相关值，并在所述下行信号的所述相关值超过预设门限时，根据所述接收器30接收到的所述下行信号的次数和第二预设关系，确定所述终端所处的所述第一覆盖等级；其中，所述第二预设关系包括所述下行信号的相关值超过预设门限时所述终端接收到的所述下行信号的次数与所述第一覆盖等级之间的映射关系。
具体的，以下行信号为PSS信号为例(下行信号为SSS信号可以参见下面的执行过程)，在上述接收器30第一次接收到PSS信号时，将PSS信号送给处理器31；处理器31将该PSS信号与终端内部预设的PSS信号的参考信号进行相关(终端接收到的网络设备发送的PSS信号为经过无线信道的PSS信号，该PSS信号实际上已经受到信道衰减或干扰等因素影响，并不是网络设备最初发给终端的理想的PSS信号，而终端内部预设的PSS信号的参考信号为未经过无线信道的理想PSS信号)，获得PSS信号的相关值，并判断该PSS信号的相关值是否超过预设门限；当超过预设门限时，处理器31确定PSS信号的重复次数为1，当没有超过门限，则处理器31将接收到的下一个PSS信号和之前的PSS信号进行能量累积，并计算累积后的PSS信号的相关值(即将累积后的PCC信号与终端内部预设的PSS信号的参考信号进行相关)，判断该相关值是否超过预设门限，以此类推，直至处理器31判断PSS信号的相关值超过预设门限时，确定截至PSS信号的相关值大于预设门限时的接收到PSS信号的次数。
处理器31将上述确定的PSS信号的相关值大于预设门限时接收器30接收到PSS信号的次数与第二预设关系进行匹配，以确定终端所处的第一覆盖等级。该第二预设关系可以包括多个预设阈值范围，且每个预设阈值范围对应一个覆盖等级。可选的，该第二预设关系可以为映射表的形式，具体可以参见上述表2所示的例子，在此不再赘述。当处理器31确定终端所处的第一覆盖等级后，根据该第一覆盖等级确定向网络设备发送上行信号时所采用的上行通信参数。
本发明实施例提供的终端，通过接收器接收网络设备发送的下行信号，处理器根据下行信号的相关值超过预设门限时接收器接收到的下行信号的次数和第二预设关系确定终端所处的第一覆盖等级，并根据该第一覆盖等级确定终端向网络设备发送上行信号时所采用的上行通信参数，从而使得发送器 根据该上行通信参数向网络设备发送上行信号，实现无线网络的覆盖增强。本发明实施例提供的终端，对无线网络进行覆盖增强时，通过根据终端所处的覆盖等级确定的上行通信参数向网络设备发送上行信号，避免了终端盲目通过提高重发次数来提升无线网络的覆盖性能造成的重复次数冗余，减小了终端的耗电；并且无需网络设备向终端发送ACK或NACK反馈，节省了终端与网络设备之间的空口开销。此外，采用本发明实施例提供的终端，直接根据下行信号确定终端的覆盖等级，并根据覆盖等级及时有效地调整上行通信参数，进而使得终端能够及时有效地进行覆盖增强调整，提高了覆盖增强的执行效率，从而提升上行通信的性能。
在上述图5所示实施例的基础上，作为本实施例第三种可能的实施方式，本实施例涉及的是当下行信号为BCCH载波上传输的信号时，终端进行覆盖增强的具体过程。在上述图1所示实施例的基础上，上述处理器31，具体用于测量所述接收器30在预设时间段内接收到的所述下行信号的信号接收强度，并根据在所述预设时间段内测量的所述下行信号的信号接收强度，确定第一信号接收强度，并根据所述第一信号接收强度以及第三预设关系，确定所述终端所处的所述第一覆盖等级；其中，所述第三预设关系包括所述第一信号接收强度与所述第一覆盖等级之间的映射关系。
具体的，网络设备在预设时间段内向终端发送在BCCH载波上传输的信号，即该信号是承载在BCCH中发送给终端的。接收器30将接收到的BCCH载波上传输的信号传送给处理器31，处理器31测量这些在BCCH载波上传输的信号的信号接收强度，并根据这些BCCH载波上传输的信号的信号接收强度计算得到第一信号接收强度。可选的，该第一信号接收强度可以为BCCH载波上传输的信号的平均信号接收强度，还可以为处理器31对上述预设时间段内的所有BCCH载波上传输的信号的信号接收强度进行任一种计算得到的信号接收强度。
处理器31将上述所确定的第一信号接收强度与第三预设关系进行匹配，以确定终端所处的第一覆盖等级。该第三预设关系可以包括多个预设阈值范围，且每个预设阈值范围对应一个覆盖等级。可选的，该第三预设关系可以为映射表的形式，具体可以参见上述表3所示的例子，在此不再赘述。当处 理器31确定终端所处的第一覆盖等级后，根据该第一覆盖等级确定向网络设备发送上行信号时所采用的上行通信参数。
本发明实施例提供的终端，通过接收器接收网络设备发送的下行信号，处理器通过测量在预设时间段内接收到的每个下行信号的信号接收强度获取这些下行信号的第一信号接收强度，并根据该第一信号接收强度和第三预设关系确定终端所处的第一覆盖等级，从而根据该第一覆盖等级确定终端向网络设备发送上行信号时所采用的上行通信参数，使得发送器根据该上行通信参数向网络设备发送上行信号，实现无线网络的覆盖增强。本发明实施例提供的终端，对无线网络进行覆盖增强时，通过根据终端所处的覆盖等级确定的上行通信参数向网络设备发送上行信号，避免了终端盲目通过提高重发次数来提升无线网络的覆盖性能造成的重复次数冗余，减小了终端的耗电；并且无需网络设备向终端发送ACK或NACK反馈，节省了终端与网络设备之间的空口开销。此外，采用本发明实施例提供的终端，直接根据下行信号确定终端的覆盖等级，并根据覆盖等级及时有效地调整上行通信参数，进而使得终端能够及时有效地进行覆盖增强调整，提高了覆盖增强的执行效率，从而提升上行通信的性能。
在上述图5所示实施例的基础上，作为本实施例第四种可能的实施方式，本实施例涉及的是当下行信号为用于小区信道测量的参考信号时，终端进行覆盖增强的具体过程。在上述图1所示实施例的基础上，上述处理器31具体用于根据所述接收器30在预设时间段内接收到的所述下行信号，测量所述终端与所述网络设备之间的路径损耗，并根据所述预设时间段内测量的所有路径损耗，确定所述终端与所述网络设备之间的第一路径损耗，并根据所述第一路径损耗和第四预设关系，确定所述终端所处的所述第一覆盖等级；其中，所述第四预设关系包括所述第一路径损耗与所述第一覆盖等级之间的映射关系。
具体的，以上述CRS信号为例，网络设备在预设时间段内，重复向终端发送CRS信号；接收器30将接收到的每个CRS信号均送给处理器31；处理器31根据接收器30在预设时间段内接收到的每个CRS信号测量终端与网络设备之间的路径损耗(一个CRS信号对应一个路径损耗)，并根据这些路径 损耗计算得到终端与网络设备之间的第一路径损耗，可选的，该第一路径损耗可以为终端与网络设备之间的平均路径损耗，还可以为处理器31对上述预设时间段内终端与网络设备之间所有的路径损耗进行任一种计算得到的路径损耗。
处理器31将上述所确定的第一路径损耗与第四预设关系进行匹配，以确定终端所处的第一覆盖等级。该第四预设关系可以包括多个预设阈值范围，且每个预设阈值范围对应不同的覆盖等级。可选的，该第四预设关系可以为映射表的形式，具体可以参见上述表4所示，在此不再赘述。当处理器31确定终端所处的第一覆盖等级后，根据该第一覆盖等级确定向网络设备发送上行信号时所采用的上行通信参数。
本发明实施例提供的终端，通过接收器接收网络设备发送的下行信号，处理器根据接收器在预设时间段内接收到的每个CRS信号测量终端与网络设备之间的路径损耗，获取终端与网络设备之间的第一路径损耗，并根据该第一路径损耗和第四预设关系确定终端所处的第一覆盖等级，以根据该第一覆盖等级确定终端向网络设备发送上行信号时所采用的上行通信参数，使得发送器根据该上行通信参数向网络设备发送上行信号，从而实现无线网络的覆盖增强。本发明实施例提供的终端，对无线网络进行覆盖增强时，通过根据终端所处的覆盖等级确定的上行通信参数向网络设备发送上行信号，避免了终端盲目通过提高重发次数来提升无线网络的覆盖性能造成的重复次数冗余，减小了终端的耗电；并且无需网络设备向终端发送ACK或NACK反馈，节省了终端与网络设备之间的空口开销。此外，采用本发明实施例提供的终端，直接根据下行信号确定终端的覆盖等级，并根据覆盖等级及时有效地调整上行通信参数，进而使得终端能够及时有效地进行覆盖增强调整，提高了覆盖增强的执行效率，从而提升上行通信的性能。
在上述任一实施例的基础上，作为本发明实施例第五种可能的实施方式，本实施例涉及的是终端将所确定的第一覆盖等级发送给网络设备，以使网络设备对终端进行合理的资源调度的具体过程。上述发送器32，还用于将所述第一覆盖等级发送给所述网络设备。
具体的，在上述处理器31根据下行信号确定出终端所处的第一覆盖等级 之后，通过发送器32将该第一覆盖等级发送给网络设备。可选的，可以是直接将第一覆盖等级以显式的方式(直接以消息信元的方式)发送给网络设备，还可以将第一覆盖等级携带在某种物理信号中，以隐式的方式发送给网络设备。可选的，显示发送方式中可以通过RACH上发送的信道请求消息将该第一覆盖等级发送给网络设备。隐式的发送方式中，终端可以通过上行信号重复发送的次数，或者其他物理层处理(如符号旋转、信号循环移位、特殊序列的加入或扰码等方式)携带第一覆盖等级信息。
网络设备在接收到第一覆盖等级之后，对该终端的上下行资源进行合理的资源调度。
本发明实施例提供的终端，在处理器根据下行信号确定出终端所处的第一覆盖等级之后，通过发送器将该第一覆盖等级发送给网络设备，使得网络设备对终端的上下行资源调度更准确，提高了资源利用率。
在上述任一实施例的基础上，作为本发明实施例第六种可能的实施方式，本实施例涉及的是终端更新覆盖等级的具体过程。进一步地，上述处理器31，还用于与所述网络设备建立业务连接；所述接收器30，还用于接收所述网络设备重复发送的业务信号；其中，所述业务信号的重复次数为所述网络设备根据所述终端所处的所述第一覆盖等级确定的；所述处理器31，还用于根据成功解码所述业务信号时接收到的所述业务信号的次数和第五预设关系，确定所述终端所处的第二覆盖等级；其中，所述第五预设关系包括所述终端成功解码所述业务信号时接收到的所述业务信号的次数和所述第二覆盖等级之间的映射关系。
具体的，上述任一实施例中，终端确定自己所处的第一覆盖等级之后，才与网络设备进行业务信道的通信。上述业务信号可以为下行数据信号。
接收器30接收网络设备重复发送的业务信号，该业务信号的重复次数为网络设备根据上述发送器32上报的终端所处的第一覆盖等级确定的，假设为n，即终端本身的第一覆盖等级决定了终端需要业务信号重复n次才可以解码成功，因此网络设备发送业务信号的次数为n。接收器30将接收到的业务信号均会送给处理器31。处理器31对业务信号进行解码，当解码成功时，处理器记录截至解码成功时业务信号的重复次数，假设为m(m小于n)，即终 端此时仅需要m次就可以将业务信号解码成功。因此，处理器31根据解码成功时业务信号的重复次数(即m)与第五预设关系进行匹配，确定终端所处的第二覆盖等级，以将终端原来的第一覆盖等级更新为第二覆盖等级。可选的，终端还可以通过发送器32将该第二覆盖等级发送给网络设备，使得网络设备根据该第二覆盖等级为终端分配合理的资源，避免冗余发送造成的资源浪费。可选的，终端还可以根据第二覆盖等级及时调整与网络设备进行业务通信时所采用的重复次数或信道带宽或发射功率或调制编码方式等上行通信参数。
本发明实施例提供的终端，通过接收器接收网络设备重复发送的业务信号，该业务信号的重复次数为网络设备根据终端所处的第一覆盖等级确定的；处理器根据成功解码时所述业务信号的次数和第五预设关系确定终端所处的第二覆盖等级。本发明实施例提供的终端，通过及时更新终端所处的覆盖等级，并根据更新后的覆盖等级及时有效地调整上行通信参数，进而使得终端能够及时有效地进行覆盖增强调整，提高了覆盖增强的执行效率，从而提升上行通信的性能。
可选地，在上述任一实施例的基础上，上述终端根据自己所处的第一覆盖等级确定的上行通信参数可以为终端发送所述上行信号时所采用的重复次数、信道带宽、发射功率和调制编码方式中的至少一种。
需要说明的是，因为终端与网络设备进行通信可以采用多种信道带宽，因此，这里处理器31根据上述第一覆盖等级确定的是终端向网络设备发送上行信号时所采用的信道带宽，使得发送器32可以以预设的重复次数采用确定的信道带宽向网络设备发送上行信号，该预设的重复次数与确定的终端发送上行信号所采用的信道带宽存在对应关系。例如，当发送器32发送上行信号所采用的信道带宽越窄时，由于信道带宽越窄，发送器32所发送的上行信号的能量越集中，因此该预设的重复次数就越小，故终端能够以一个较合适的重复次数向网络设备发送上行信号，节省了终端的信令开销。
另一方面，处理器31还可以根据上述所确定的第一覆盖等级确定终端向网络设备发送上行信号时所采用的信道带宽和重复次数，即处理器31根据第一覆盖等级同时确定出适于终端发送上行信号采用的信道带宽和重复次数， 这里所确定的信道带宽和重复次数是处理器31根据第一覆盖等级、重复次数以及信道带宽综合考虑的。例如：处理器31可以根据第一覆盖等级确定一个重复次数A，也可以根据该第一覆盖等级确定一信道带宽B，但是处理器31可以根据无线网络中实际的无线环境(例如：信道的快慢衰落、信道噪声等)对所确定的重复次数A、信道带宽B加以微调，选择一个合理的信道带宽a和重复次数b，在信道带宽a上以重复次数b发送上行信号。该方法终端也无需重复很多次向网络设备发送上行信号，节省了终端的信令开销。
另一方面，本发明实施例中的终端与网络设备进行通信时可以采用多种调制编码方式。处理器31根据上述第一覆盖等级确定终端向网络设备发送上行信号时所采用的调制编码方式。例如，终端确定的第一覆盖等级越高时，即说明终端当前所处的无线信道环境较差，需要将当前的覆盖性能提升较大的幅度，则终端采用低阶的调制方式以及冗余度较高的编码方式，避免终端采用不合适的调制编码方式造成的冗余发送，节省了终端的信令开销。
本实施例提供的终端，使得终端在上行通信时可以采用适于终端发送上行信号的上行通信参数，节省了终端的信令开销。
图6为本发明提供的网络设备实施例三的结构示意图。如图6所示，该网络设备包括：发送器41和接收器42。其中，发送器41，用于向终端发送下行信号；接收器42，用于接收所述终端根据自身所确定的上行通信参数发送的上行信号；其中，所述上行通信参数为所述终端根据所述第一覆盖等级确定的，所述第一覆盖等级为所述终端根据所述下行信号确定的。
具体的，发送器41向终端发送下行信号，该下行信号可以为网络设备下发的任意信号，例如广播信号、公共控制信号、业务信号等。终端在接收到网络设备发送的下行信号之后，根据该下行信号判断终端所处的第一覆盖等级。可选的，终端可以通过对某一时间段内的重复发送的下行信号的测量或解码确定终端所处的第一覆盖等级。
上述第一覆盖等级可以与覆盖性能需要提升的值相对应，例如：假设终端的覆盖等级具体可以包括3个等级，分别是覆盖等级0、覆盖等级1和覆盖等级2，且覆盖等级0对应覆盖性能需要提升0dB(即不需要提升)，覆盖等级1对应覆盖性能需要提升0-10dB，覆盖等级2对应覆盖性能需要提升 10-20dB。考虑到覆盖性能提升和***设计的复杂度，这里仅考虑将覆盖性能需要提升的最大值作为其覆盖性能提升的目标，即当终端判断自己所处的第一覆盖等级为覆盖等级1时，可以根据该第一覆盖等级确定上行通信参数进行配置，使得接收器42可以接收到终端根据该上行通信参数发送的上行信号，从而使得覆盖性能可以提升10dB。该上行通信参数可以为终端向网络设备发送上行信号时重复的次数，还可以为终端向网络设备发送上行信号时的功率，还可以为终端向网络设备发送上行信号时所采用的信号带宽，还可以为终端向网络设备发送上行信号时所采用的调制编码方式等，本发明实施例对上行通信参数并不做限制，只要该参数与覆盖性能相关即可。可选的，按照上述所举的例子，当终端判断自身所处的第一覆盖等级为覆盖等级1时，可以将覆盖性能提高10dB。
现有技术中，为了增强无线网络的覆盖性能，往往是通过HARQ或ARQ重传机制进行的，而HARQ或ARQ是基于MAC层和/或RLC层的发送机制，终端需要网络设备的ACK/NACK的应答机制来配合执行，以提成终端成功接收的可能性，该方法空***互频繁，信令开销大，并且覆盖增强的执行周期较长，使得终端的耗电量大；另外，由于受到资源、时延和通信流程复杂度等因素的考虑重传次数一般设置不大，因此其覆盖增强的幅度有限；此外，终端不能随着所处的覆盖环境变化做出及时有效地覆盖增强调整，覆盖增强的执行效率低。但是，在本申请中，终端是根据网络设备下发的下行信号来确定自身所处的第一覆盖等级，并通过第一覆盖等级确定向网络设备发送上行信号时所采用的上行通信参数，即终端是否向网络设备重复发送上行信号或者发送上行信号的重复次数是由终端的第一覆盖等级确定的，网络设备无需向终端发送ACK/NACK反馈(即终端不用等待ACK或NACK反馈)，因此其覆盖增强的执行周期较短，减小了终端的耗电以及信令的开销；并且，灵活的重复发送次数对于无线网络的覆盖性能提升较大；此外，终端直接根据下行信号确定终端的覆盖等级，并根据覆盖等级及时有效地调整上行通信参数，进而使得终端能够及时有效地进行覆盖增强调整，提高了覆盖增强的执行效率，从而提升上行通信的性能。
本发明实施例提供的网络设备，通过发送器向终端发送下行信号，使得终端根据该下行信号判断自身所处的第一覆盖等级，并根据该第一覆盖等级 确定上行通信参数，从而使得接收器可以接收到终端根据所确定的上行通信参数发送的上行信号，进而实现无线网络的覆盖增强。本发明实施例提供的网络设备，提升了上行信号成功接收的概率，从而无需网络设备向终端发送ACK或NACK反馈，节省了终端与网络设备之间的空口开销，缩短了终端进行覆盖增强的周期，从而减小了终端的耗电。此外，采用本发明实施例提供的终端，直接根据下行信号确定终端的覆盖等级，并根据覆盖等级及时有效地调整上行通信参数，进而使得终端能够及时有效地进行覆盖增强调整，提高了覆盖增强的执行效率，从而提升上行通信的性能。
进一步地，上述下行信号包括：SCH信道上传输的第一信号、CCH信道上传输的第二信号、BCCH上传输的第三信号、用于下行同步的重复发送的序列信号、用于小区信道测量的参考信号、BCCH载波上传输的信号中的其中一种信号。
可选的，上述用于下行同步的重复发送的序列信号可以为PSS信号，还可以为SSS信号；上述用于小区信道测量的参考信号可以为CRS信号。
进一步地，上述上行通信参数可以为：所述终端发送所述上行信号所采用的重复次数、信道带宽、发射功率和调制编码方式。
需要说明的是，因为终端与网络设备进行通信可以采用多种信道带宽，因此，这里终端根据上述第一覆盖等级确定的是终端向网络设备发送上行信号时所采用的信道带宽，使得终端可以以预设的重复次数采用确定的信道带宽向网络设备发送上行信号，该预设的重复次数与确定的终端发送上行信号所采用的信道带宽存在对应关系。例如，当终端发送上行信号所采用的信道带宽越窄时，由于信道带宽越窄，终端所发送的上行信号的能量越集中，因此该预设的重复次数就越小，故终端能够以一个较合适的重复次数向网络设备发送上行信号，节省了终端的信令开销。
另一方面，终端还可以根据上述所确定的第一覆盖等级确定终端向网络设备发送上行信号时所采用的信道带宽和重复次数，即终端根据第一覆盖等级同时确定出适于终端发送上行信号采用的信道带宽和重复次数，这里所确定的信道带宽和重复次数是终端根据第一覆盖等级、重复次数以及信道带宽综合考虑的。例如：终端可以根据第一覆盖等级确定一个重复次数A，也可以根据该第一覆盖等级确定一信道带宽B，但是终端可以根据无线网络中实 际的无线环境(例如：信道的快慢衰落、信道噪声等)对所确定的重复次数A、信道带宽B加以微调，选择一个合理的信道带宽a和重复次数b，在信道带宽a上以重复次数b发送上行信号。该方法终端也无需重复很多次向网络设备发送上行信号，节省了终端的信令开销。
另一方面，本发明实施例中的终端与网络设备进行通信时可以采用多种调制编码方式。终端根据上述第一覆盖等级确定终端向网络设备发送上行信号时所采用的调制编码方式。例如，终端确定的第一覆盖等级越高时，即说明终端当前所处的无线信道环境较差，需要将当前的覆盖性能提升较大的幅度，则终端采用低阶的调制方式以及冗余度较高的编码方式，避免终端采用不合适的调制编码方式造成的冗余发送，节省了终端的信令开销。
本实施例提供的网络设备，使得终端可以根据网络设备下发的下行信号确定第一覆盖等级，并根据该第一覆盖等级确定在上行通信时终端可以采用适于终端发送上行信号的上行通信参数，节省了终端的信令开销。
图7为本发明提供的网络设备实施例四的结构示意图。在上述实施例的基础上，本实施例涉及的是网络设备接收终端发送的第一覆盖等级，并根据该第一覆盖等级对终端进行资源调度的具体过程。进一步地，上述网络设备还可以包括处理器43。上述接收器42，还用于接收所述终端发送的所述第一覆盖等级；上述处理器43，用于在所述接收器42接收所述终端发送的所述第一覆盖等级之后，根据所述第一覆盖等级对所述终端进行资源调度.
具体的，上述终端确定出自身所处的第一覆盖等级之后，将该第一覆盖等级发送给网络设备，接收器42接收该第一覆盖等级，使得处理器43可以根据该第一覆盖等级计算出上行或下行资源，对终端进行合理的资源调度。可选的，网络设备可以向终端发送一调度信息，该调度信息中可以包括上行或下行资源大小，使得终端获知进行上行通信时应该采用的时频资源大小。可选的，终端可以是直接将第一覆盖等级以显式的方式(直接以消息信元的方式)发送给网络设备，还可以将第一覆盖等级携带在某种物理信号特征中，以隐式的方式发送给网络设备。可选的，显示发送方式中可以通过RACH上发送的信道请求消息将该第一覆盖等级发送给网络设备。隐式的发送方式中，终端可以通过上行重复发送的次数，或者其他物理层处理(如符号旋转、信 号循环移位、特殊序列的加入或扰码等方式)携带第一覆盖等级信息。
本发明实施例提供的网络设备，通过接收器接收终端发送的第一覆盖等级，处理器根据该第一覆盖等级对终端进行资源调度，使得网络设备对终端的上下行资源调度更准确，提高了资源利用率。
继续参照图7，在上述实施例的基础上，本实施例涉及的是网络设备与终端建立业务连接，通过向终端发送业务信号，使得终端及时更新自身的覆盖等级的具体过程。进一步地，上述处理器43，还用于在所述接收器42接收所述终端发送的所述第一覆盖等级之后，与所述终端建立业务连接；则上述发送器41，还用于根据所述第一覆盖等级向所述终端重复发送业务信号，以使所述终端根据所述重复发送的业务信号确定所述终端所处的第二覆盖等级。
具体的，上述任一实施例中，处理器43在接收器42接收到终端发送的第一覆盖等级之后，才与终端建立业务通信。
发送器41根据接收器42接收到的第一覆盖等级向终端重复发送业务信号，该业务信号可以为下行数据信号、下行语音信号、下行视频信号等等，并且该业务信号的重复次数为处理器43根据终端上报的第一覆盖等级确定的，假设为n，即终端本身的第一覆盖等级决定了终端需要网络设备下发n次业务信号才可以解码成功，因此处理器43根据接收器42接收到的第一覆盖等级确定发送业务信号的次数为n。终端对业务信号进行解码，当解码成功时，终端确定截至解码成功时业务信号的重复次数，假设为m(m小于n)，即终端此时仅需要网络设备下发m次业务信号就可以将业务信号解码成功。因此，终端根据解码成功时业务信号的重复次数(即m)与第五预设关系进行匹配，确定终端所处的第二覆盖等级，以将终端原来的第一覆盖等级更新为第二覆盖等级。可选的，终端还可以将该第二覆盖等级发送给网络设备，使得网络设备根据该第二覆盖等级为终端分配合理的资源，避免冗余发送造成的资源浪费。可选的，终端还可以根据第二覆盖等级及时调整与网络设备进行业务通信时所采用的重复次数或信道带宽或发射功率或调制编码方式等上行通信参数。
本发明实施例提供的网络设备，通过处理器在接收器接收到终端发送的 第一覆盖等级之后，与终端建立业务通信；发送器根据该第一覆盖等级向终端重复发送业务信号，以使终端根据该重复发送的业务信号确定终端所处的第二覆盖等级。本发明实施例提供的网络设备，通过及时更新终端所处的覆盖等级，并根据更新后的覆盖等级及时有效地调整上行通信参数，进而使得终端能够及时有效地进行覆盖增强调整，提高了覆盖增强的执行效率，从而提升上行通信的性能。
进一步地，在上述图7所示实施例的基础上，当所述上行通信参数包括终端发送所述上行信号所采用的重复次数、信道带宽或调制编码方式时，上述接收器42，还用于接收所述终端发送的所述上行通信参数；上述处理器43，还用于根据所述上行通信参数解码所述上行信号。
可选的，当上述上行通信参数为终端发送上行信号所采用的重复次数时，网络设备可以根据该上行通信参数获知需要将终端发送的上行信号解码多少次才可以将上行信号解码成功，避免了网络设备的重复解码，节省了网络设备的处理开销。
可选的，当上述上行通信参数为终端发送上行信号所采用的信道带宽或调制编码方式时，网络设备可以明确知道采用哪一种信道带宽或哪一种调制编码方式对上行信号进行解码，避免了网络设备盲目检测(即网络设备在不知道解码所用的信道带宽或调制编码方式时，会将终端所采用的所有信道带宽或调制编码方式进行解码检测，即终端的盲目检测)，节省了网络设备的处理开销，降低了网络设备的解码复杂度。
本发明实施例提供的网络设备，通过接收器接收终端发送上行信号所采用的重复次数或信道带宽或调制编码方式，使得处理器可以根据终端上行信号所采用的重复次数或信道带宽或调制编码方式对上行信号进行准确解码，降低了网络设备解码时的处理开销和复杂度。
图8为本发明提供的无线网络覆盖增强***实施例的结构示意图。如图8所示，该***包括上述实施例所示的终端51和上述实施例中所示的网络设备52，其实现原理和技术效果类似，在此不再赘述。
图9为本发明提供的无线网络覆盖增强的方法实施例一的流程示意图。如图9所示，该方法包括：
S101：终端接收网络设备发送的下行信号。
S102：终端根据所述下行信号，确定所述终端所处的第一覆盖等级。
S103：终端根据所述第一覆盖等级，确定上行通信参数。
S104：终端根据所述上行通信参数，向所述网络设备发送上行信号。
本发明实施例提供的无线网络覆盖增强的方法，可以参照上述终端实施例的执行过程，其实现原理和技术效果类似，在此不再赘述。
进一步地，上述上行通信参数包括以下至少一种：发送所述上行信号所采用的重复次数、信道带宽、发射功率和调制编码方式。
上述下行信号包括：下行同步信道SCH上传输的第一信号、公共传输信道CCH上传输的第二信号、广播控制信道BCCH上传输的第三信号、用于下行同步的重复发送的序列信号、用于小区信道测量的参考信号、BCCH载波上传输的信号中的至少一种信号。
可选的，当所述下行信号为所述第一信号、所述第二信号、所述第三信号中的任一种时，则上述S102具体可以为：当成功解码所述下行信号时,所述终端根据接收到的所述下行信号的次数和第一预设关系，确定所述终端所处的所述第一覆盖等级；其中，所述第一预设关系包括所述终端成功解码所述下行信号时接收到的所述下行信号的次数与所述第一覆盖等级之间的映射关系。
本发明实施例提供的无线网络覆盖增强的方法，可以参照上述终端实施例的执行过程，其实现原理和技术效果类似，在此不再赘述。
可选的，当所述下行信号为所述用于下行同步的重复发送的序列信号时，上述S102具体可以为：终端将在接收到所述下行信号的时刻对所接收到的所有所述下行信号进行能量累积；终端将能量累积后的信号与预设的所述下行信号的参考信号进行相关得到所述下行信号的相关值；当所述下行信号的所述相关值超过预设门限时，终端根据接收到的所述下行信号的次数和第二预设关系，确定所述终端所处的所述第一覆盖等级；其中，所述第二预设关系包括所述下行信号的相关值超过预设门限时所述终端接收到的所述下行信号的次数与所述第一覆盖等级之间的映射关系。
本发明实施例提供的无线网络覆盖增强的方法，可以参照上述终端实施例的执行过程，其实现原理和技术效果类似，在此不再赘述。
可选的，当所述下行信号为所述BCCH载波上传输的信号时，则上述S102具体可以为：终端测量在预设时间段内接收到的所述下行信号的信号接收强度；终端根据所述预设时间段内测量的所述下行信号的信号接收强度，确定第一信号接收强度；终端根据所述第一信号接收强度以及第三预设关系，确定所述终端所处的所述第一覆盖等级；其中，所述第三预设关系包括所述第一信号接收强度与所述第一覆盖等级之间的映射关系。
本发明实施例提供的无线网络覆盖增强的方法，可以参照上述终端实施例的执行过程，其实现原理和技术效果类似，在此不再赘述。
可选的，当所述下行信号为所述用于小区信道测量的参考信号时，则上述S102具体可以为：终端根据预设时间段内接收到的所述下行信号，测量所述终端与所述网络设备之间的路径损耗；终端根据所述预设时间段内测量的所有路径损耗，确定所述终端与所述网络设备的第一路径损耗；终端根据所述第一路径损耗和第四预设关系，确定所述终端所处的所述第一覆盖等级；其中，所述第四预设关系包括所述第一路径损耗与所述第一覆盖等级之间的映射关系。
本发明实施例提供的无线网络覆盖增强的方法，可以参照上述终端实施例的执行过程，其实现原理和技术效果类似，在此不再赘述。
图10为本发明提供的无线网络覆盖增强的方法实施例二的流程示意图。本实施例涉及的是网络设备根据终端发送的第一覆盖等级对终端进行资源调度的过程。在上述实施例的基础上，进一步地，在上述S102之后，上述方法还包括：
S201：终端将所述第一覆盖等级发送给所述网络设备。
本发明实施例提供的无线网络覆盖增强的方法，可以参照上述终端实施例的执行过程，其实现原理和技术效果类似，在此不再赘述。
图11为本发明提供的无线网络覆盖增强的方法实施例三的流程示意图。本实施例涉及的是终端与网络设备进行业务通信时，根据网络设备下发的业务信号更新自身所处的覆盖等级的具体过程。如图11所示，在上述S201之后，该方法还可以包括：
S301：终端与所述网络设备建立业务连接。
S302：终端接收所述网络设备重复发送的业务信号；其中，所述业务信 号的重复次数为所述网络设备根据所述终端所处的所述第一覆盖等级确定的。
S303：终端根据成功解码所述业务信号时接收到的所述业务信号的次数和第五预设关系，确定所述终端所处的第二覆盖等级；其中，所述第五预设关系包括所述终端成功解码所述业务信号时接收到的所述业务信号的次数和所述第二覆盖等级之间的映射关系。
本发明实施例提供的无线网络覆盖增强的方法，可以参照上述终端实施例的执行过程，其实现原理和技术效果类似，在此不再赘述。
图12为本发明提供的无线网络覆盖增强的方法实施例四的流程示意图。如图12所示，该方法包括：
S401：网络设备向终端发送下行信号。
S402：网络设备接收所述终端根据上行通信参数发送的上行信号；其中，所述上行通信参数为所述终端根据第一覆盖等级确定的；所述第一覆盖等级为所述终端根据所述下行信号确定的。
本发明实施例提供的无线网络覆盖增强的方法，可以参照上述网络设备实施例的执行过程，其实现原理和技术效果类似，在此不再赘述。
进一步地，上述上行通信参数包括以下至少一种：发送所述上行信号所采用的重复次数、信道带宽、发射功率和调制编码方式。
上述下行信号包括：下行同步信道SCH上传输的第一信号、公共传输信道CCH上传输的第二信号、广播控制信道BCCH上传输的第三信号、用于下行同步的重复发送的序列信号、用于小区信道测量的参考信号、BCCH载波上传输的信号中的至少一种信号。
图13为本发明提供的无线网络覆盖增强的方法实施例五的流程示意图。本实施例涉及的是网络设备根据终端发送的第一覆盖等级对终端进行资源调度的过程。在上述实施例的基础上，进一步地，在上述S401之后，如图13所示，上述方法还包括：
S501：网络设备接收所述终端发送的所述第一覆盖等级；其中，所述第一覆盖等级为所述终端根据所述下行信号确定的。
本发明实施例提供的无线网络覆盖增强的方法，可以参照上述网络设备 实施例的执行过程，其实现原理和技术效果类似，在此不再赘述。
图14为本发明提供的无线网络覆盖增强的方法实施例六的流程示意图。本实施例涉及的是网络设备与终端建立业务连接，向终端重复发送业务信号，使得终端根据所发送的业务信号及时更新自身所处的覆盖等级的具体过程。在上述图13实施例的基础上，进一步地，如图14所示，在S501之后，上述方法还包括：
S601：网络设备与所述终端建立业务连接，并根据所述第一覆盖等级向所述终端重复发送业务信号，以使所述终端根据所述重复发送的业务信号确定所述终端所处的第二覆盖等级；或者，网络设备根据所述第一覆盖等级对所述终端进行资源调度。
本发明实施例提供的无线网络覆盖增强的方法，可以参照上述网络设备实施例的执行过程，其实现原理和技术效果类似，在此不再赘述。
图15为本发明提供的无线网络覆盖增强的方法实施例七的流程示意图。本实施例涉及的是网络设备根据终端发送的上行通信参数对上行信号进行解码的过程。在上述S401之后，如图15所示，上述方法还包括：
S701：网络设备接收所述终端发送的所述上行通信参数，并根据所述上行通信参数解码所述上行信号；其中，所述上行通信参数为所述终端根据第一覆盖等级确定的。
本发明实施例提供的无线网络覆盖增强的方法，可以参照上述网络设备实施例的执行过程，其实现原理和技术效果类似，在此不再赘述。
本领域普通技术人员可以理解：实现上述方法实施例的全部或部分步骤可以通过程序指令相关的硬件来完成，前述的程序可以存储于一计算机可读取存储介质中，该程序在执行时，执行包括上述方法实施例的步骤；而前述的存储介质包括：ROM、RAM、磁碟或者光盘等各种可以存储程序代码的介质。
最后应说明的是：以上各实施例仅用以说明本发明的技术方案，而非对其限制；尽管参照前述各实施例对本发明进行了详细的说明，本领域的普通技术人员应当理解：其依然可以对前述各实施例所记载的技术方案进行修改，或者对其中部分或者全部技术特征进行等同替换；而这些修改或者替换，并不使相应技术方案的本质脱离本发明各实施例技术方案的范围。

Claims (31)

  1. 一种终端，其特征在于，包括：
    接收单元，用于接收网络设备发送的下行信号；
    处理单元，用于根据所述下行信号，确定所述终端所处的第一覆盖等级，并根据所述第一覆盖等级，确定上行通信参数；
    发送单元，用于根据所述上行通信参数，向所述网络设备发送上行信号。
  2. 根据权利要求1所述的终端，其特征在于，所述上行通信参数包括以下至少一种：所述终端发送所述上行信号所采用的重复次数、信道带宽、发射功率和调制编码方式。
  3. 根据权利要求1或2所述的终端，其特征在于，所述下行信号包括：下行同步信道SCH上传输的第一信号、公共传输信道CCH上传输的第二信号、广播控制信道BCCH上传输的第三信号、、用于下行同步的重复发送的序列信号、用于小区信道测量的参考信号、BCCH载波上传输的信号中的至少一种信号。
  4. 根据权利要求3所述的终端，其特征在于，当所述下行信号为所述第一信号、所述第二信号、所述第三信号中的任一种时，所述处理单元，具体用于当成功解码所述下行信号时，根据所述接收单元接收到的所述下行信号的次数和第一预设关系，确定所述终端所处的所述第一覆盖等级；其中，所述第一预设关系包括所述终端成功解码所述下行信号时接收到的所述下行信号的次数与所述第一覆盖等级之间的映射关系。
  5. 根据权利要求3所述的终端，其特征在于，当所述下行信号为所述用于下行同步的重复发送的序列信号时，所述处理单元，具体用于将在接收到所述下行信号的时刻对所述接收单元接收到的所有所述下行信号进行能量累积，并将能量累积后的信号与预设的所述下行信号的参考信号进行相关得到所述下行信号的相关值，并在所述下行信号的所述相关值超过预设门限时，根据所述接收单元接收到的所述下行信号的次数和第二预设关系，确定所述终端所处的所述第一覆盖等级；其中，所述第二预设关系包括所述下行信号的相关值超过预设门限时所述终端接收到的所述下行信号的次数与所述第一覆盖等级之间的映射关系。
  6. 根据权利要求3所述的终端，其特征在于，当所述下行信号为所述 BCCH载波上传输的信号时，所述处理单元，具体用于测量所述接收单元在预设时间段内接收到的所述下行信号的信号接收强度，并根据在所述预设时间段内测量的所述下行信号的信号接收强度，确定第一信号接收强度，并根据所述第一信号接收强度以及第三预设关系，确定所述终端所处的所述第一覆盖等级；其中，所述第三预设关系包括所述第一信号接收强度与所述第一覆盖等级之间的映射关系。
  7. 根据权利要求3所述的终端，其特征在于，当所述下行信号为所述用于小区信道测量的参考信号时，所述处理单元，具体用于根据所述接收单元在预设时间段内接收到的所述下行信号，测量所述终端与所述网络设备之间的路径损耗，并根据所述预设时间段内测量的所有路径损耗，确定所述终端与所述网络设备之间的第一路径损耗，并根据所述第一路径损耗和第四预设关系，确定所述终端所处的所述第一覆盖等级；其中，所述第四预设关系包括所述第一路径损耗与所述第一覆盖等级之间的映射关系。
  8. 根据权利要求1-7任一项所述的终端，其特征在于，所述发送单元，还用于将所述第一覆盖等级发送给所述网络设备。
  9. 根据权利要求8所述的终端，其特征在于，所述处理单元，还用于与所述网络设备建立业务连接；
    所述接收单元，还用于接收所述网络设备重复发送的业务信号；其中，所述业务信号的重复次数为所述网络设备根据所述终端所处的所述第一覆盖等级确定的；
    所述处理单元，还用于根据成功解码所述业务信号时接收到的所述业务信号的次数和第五预设关系，确定所述终端所处的第二覆盖等级；其中，所述第五预设关系包括所述终端成功解码所述业务信号时接收到的所述业务信号的次数和所述第二覆盖等级之间的映射关系。
  10. 一种网络设备，其特征在于，包括：
    发送单元，用于向终端送下行信号；
    接收单元，用于接收所述终端根据自身所确定的上行通信参数发送的上行信号；其中，所述上行通信参数为所述终端根据所述第一覆盖等级确定的；所述第一覆盖等级为所述终端根据所述下行信号确定的。
  11. 根据权利要求10所述的网络设备，其特征在于，所述上行通信参数 包括以下至少一种：所述终端发送所述上行信号所采用的重复次数、信道带宽、发射功率和调制编码方式。
  12. 根据权利要求10或11所述的网络设备，其特征在于，所述下行信号包括：下行同步信道SCH上传输的第二信号、公共传输信道CCH上传输的第三信号、广播控制信道BCCH上传输的第四信号、用于下行同步的重复发送的序列信号、用于小区信道测量的参考信号、BCCH载波上传输的信号中的至少一种信号。
  13. 根据权利要求10至12任一项所述的网络设备，其特征在于，所述接收单元，还用于在所述发送单元向所述终端发送下行信号之后，接收所述终端发送的所述第一覆盖等级。
  14. 根据权利要求13所述的网络设备，其特征在于，所述网络设备，还包括：处理单元；
    所述处理单元，用于在所述接收单元接收所述终端发送的所述第一覆盖等级之后，与所述终端建立业务连接；
    则所述发送单元，还用于根据所述第一覆盖等级向所述终端重复发送业务信号，以使所述终端根据所述重复发送的业务信号确定所述终端所处的第二覆盖等级；
    或者，
    所述处理单元，用于在所述接收单元接收所述终端发送的所述第一覆盖等级之后，根据所述第一覆盖等级对所述终端进行资源调度。
  15. 根据权利要求12所述的网络设备，其特征在于，当所述上行通信参数包括所述终端发送所述上行信号所采用的重复次数、信道带宽或调制编码方式时，所述接收单元，还用于接收所述终端发送的所述上行通信参数；所述处理单元，还用于根据所述上行通信参数解码所述上行信号。
  16. 一种无线网络覆盖增强的方法，其特征在于，包括：
    终端接收网络设备发送的下行信号；
    所述终端根据所述下行信号，确定所述终端所处的第一覆盖等级；
    所述终端根据所述第一覆盖等级，确定上行通信参数；
    所述终端根据所述上行通信参数，向所述网络设备发送上行信号。
  17. 根据权利要求16所述的方法，其特征在于，所述上行通信参数包括 以下至少一种：所述终端发送所述上行信号所采用的重复次数、信道带宽、发射功率和调制编码方式。
  18. 根据权利要求16或17所述的方法，其特征在于，所述下行信号包括：下行同步信道SCH上传输的第一信号、公共传输信道CCH上传输的第二信号、广播控制信道BCCH上传输的第三信号、用于下行同步的重复发送的序列信号、用于小区信道测量的参考信号、BCCH载波上传输的信号中的至少一种信号。
  19. 根据权利要求18所述的方法，其特征在于，当所述下行信号为所述第一信号、所述第二信号、所述第三信号中的任一种时，所述终端根据所述下行信号，确定所述终端所处的第一覆盖等级，包括：
    当成功解码所述下行信号时,所述终端根据接收到的所述下行信号的次数和第一预设关系，确定所述终端所处的所述第一覆盖等级；
    其中，所述第一预设关系包括所述终端成功解码所述下行信号时接收到的所述下行信号的次数与所述第一覆盖等级之间的映射关系。
  20. 根据权利要求18所述的方法，其特征在于，当所述下行信号为所述用于下行同步的重复发送的序列信号时，所述终端根据所述下行信号，确定所述终端所处的第一覆盖等级，包括：
    所述终端将在接收到所述下行信号的时刻对所接收到的所有所述下行信号进行能量累积；
    所述终端将能量累积后的信号与预设的所述下行信号的参考信号进行相关得到所述下行信号的相关值；
    当所述下行信号的所述相关值超过预设门限时，所述终端根据接收到的所述下行信号的次数和第二预设关系，确定所述终端所处的所述第一覆盖等级；
    其中，所述第二预设关系包括所述下行信号的相关值超过预设门限时所述终端接收到的所述下行信号的次数与所述第一覆盖等级之间的映射关系。
  21. 根据权利要求18所述的方法，其特征在于，当所述下行信号为所述BCCH载波上传输的信号时，所述终端根据所述下行信号，确定所述终端所处的第一覆盖等级，包括：
    所述终端测量在预设时间段内接收到的所述下行信号的信号接收强度；
    所述终端根据所述预设时间段内测量的所述下行信号的信号接收强度，确定第一信号接收强度；
    所述终端根据所述第一信号接收强度以及第三预设关系，确定所述终端所处的所述第一覆盖等级；其中，所述第三预设关系包括所述第一信号接收强度与所述第一覆盖等级之间的映射关系。
  22. 根据权利要求18所述的方法，其特征在于，当所述下行信号为所述用于小区信道测量的参考信号时，所述终端根据所述下行信号，确定所述终端所处的第一覆盖等级，包括：
    所述终端根据预设时间段内接收到的所述下行信号，测量所述终端与所述网络设备之间的路径损耗；
    所述终端根据所述预设时间段内测量的所有路径损耗，确定所述终端与所述网络设备的第一路径损耗；
    所述终端根据所述第一路径损耗和第四预设关系，确定所述终端所处的所述第一覆盖等级；
    其中，所述第四预设关系包括所述第一路径损耗与所述第一覆盖等级之间的映射关系。
  23. 根据权利要求16-22任一项所述的方法，其特征在于，所述方法还包括：
    所述终端将所述第一覆盖等级发送给所述网络设备。
  24. 根据权利要求23所述的方法，其特征在于，所述终端将所述第一覆盖等级发送给所述网络设备之后，所述方法还包括：
    所述终端与所述网络设备建立业务连接；
    所述终端接收所述网络设备重复发送的业务信号；其中，所述业务信号的重复次数为所述网络设备根据所述终端所处的所述第一覆盖等级确定的；
    所述终端根据成功解码所述业务信号时接收到的所述业务信号的次数和第五预设关系，确定所述终端所处的第二覆盖等级；其中，所述第五预设关系包括所述终端成功解码所述业务信号时接收到的所述业务信号的次数和所述第二覆盖等级之间的映射关系。
  25. 一种无线网络覆盖增强的方法，其特征在于，包括：
    网络设备向终端发送下行信号；
    所述网络设备接收所述终端根据上行通信参数发送的上行信号；其中，所述上行通信参数为所述终端根据第一覆盖等级确定的；所述第一覆盖等级为所述终端根据所述下行信号确定的。
  26. 根据权利要求25所述的方法，其特征在于，所述上行通信参数包括以下至少一种：所述终端发送所述上行信号所采用的重复次数、信道带宽、发射功率和调制编码方式。
  27. 根据权利要求25或26所述的方法，其特征在于，所述下行信号包括：下行同步信道SCH上传输的第一信号、公共传输信道CCH上传输的第二信号、广播控制信道BCCH上传输的第三信号、用于下行同步的重复发送的序列信号、用于小区信道测量的参考信号、BCCH载波上传输的信号中的至少一种信号。
  28. 根据权利要求25至27任一项所述的方法，其特征在于，所述网络设备向终端发送下行信号之后，所述方法还包括：
    所述网络设备接收所述终端发送的所述第一覆盖等级。
  29. 根据权利要求28所述的方法，其特征在于，所述网络设备接收所述终端发送的所述第一覆盖等级之后，所述方法还包括：
    所述网络设备与所述终端建立业务连接，并根据所述第一覆盖等级向所述终端重复发送业务信号，以使所述终端根据所述重复发送的业务信号确定所述终端所处的第二覆盖等级；或者，
    所述网络设备根据所述第一覆盖等级对所述终端进行资源调度。
  30. 根据权利要求27所述的方法，其特征在于，当所述上行通信参数包括发送所述上行信号所采用的重复次数、信道带宽或调制编码方式时，所述方法还包括：
    所述网络设备接收所述终端发送的所述上行通信参数，并根据所述上行通信参数解码所述上行信号。
  31. 一种无线网络覆盖增强***，其特征在于，包括权利要求1至9任一项所述的终端和权利要求10至15任一项所述的网络设备。
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US20170245158A1 (en) 2017-08-24
JP6508662B2 (ja) 2019-05-08
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JP2017537572A (ja) 2017-12-14
CN105900478A (zh) 2016-08-24

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