WO2018059307A1 - 通信方法、基站和终端设备 - Google Patents
通信方法、基站和终端设备 Download PDFInfo
- Publication number
- WO2018059307A1 WO2018059307A1 PCT/CN2017/102805 CN2017102805W WO2018059307A1 WO 2018059307 A1 WO2018059307 A1 WO 2018059307A1 CN 2017102805 W CN2017102805 W CN 2017102805W WO 2018059307 A1 WO2018059307 A1 WO 2018059307A1
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- WIPO (PCT)
- Prior art keywords
- base station
- transmission time
- adjustment parameter
- terminal device
- timing advance
- Prior art date
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W56/00—Synchronisation arrangements
- H04W56/004—Synchronisation arrangements compensating for timing error of reception due to propagation delay
- H04W56/0045—Synchronisation arrangements compensating for timing error of reception due to propagation delay compensating for timing error by altering transmission time
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/12—Wireless traffic scheduling
- H04W72/121—Wireless traffic scheduling for groups of terminals or users
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L7/00—Arrangements for synchronising receiver with transmitter
- H04L7/04—Speed or phase control by synchronisation signals
- H04L7/08—Speed or phase control by synchronisation signals the synchronisation signals recurring cyclically
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/26—Systems using multi-frequency codes
- H04L27/2601—Multicarrier modulation systems
- H04L27/2647—Arrangements specific to the receiver only
- H04L27/2655—Synchronisation arrangements
- H04L27/2656—Frame synchronisation, e.g. packet synchronisation, time division duplex [TDD] switching point detection or subframe synchronisation
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W56/00—Synchronisation arrangements
- H04W56/0035—Synchronisation arrangements detecting errors in frequency or phase
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/04—Wireless resource allocation
- H04W72/044—Wireless resource allocation based on the type of the allocated resource
- H04W72/0446—Resources in time domain, e.g. slots or frames
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/12—Wireless traffic scheduling
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/12—Wireless traffic scheduling
- H04W72/1263—Mapping of traffic onto schedule, e.g. scheduled allocation or multiplexing of flows
- H04W72/1268—Mapping of traffic onto schedule, e.g. scheduled allocation or multiplexing of flows of uplink data flows
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/20—Control channels or signalling for resource management
- H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal
Definitions
- the present invention relates to the field of wireless communications, and in particular, to a technique for uplink timing of a terminal device.
- the Long Term Evolution (LTE) or Long Term Evolution Advanced (LTE-A) communication system includes downlink transmission and uplink transmission, where downlink transmission refers to transmission of information by the base station to the terminal device, and uplink transmission is performed by the terminal.
- the device transmits information to the base station.
- the LTE or LTE-A communication system mainly adopts a Frequency Division Duplex (FDD) mode and a Time Division Duplex (TDD) mode.
- FDD Frequency Division Duplex
- TDD Time Division Duplex
- the entire frequency band can only be used for downlink transmission for a period of time, or the entire frequency band can only be used for uplink transmission, and for the area covered by the same frequency band, all cells in the area are in the downlink frequency band.
- the time must be the same as the downlink transmission, or must be the same uplink transmission in the uplink frequency band.
- the flexible duplex technology can separately configure the uplink transmission and downlink transmission of each cell, which can effectively improve the utilization of network transmission resources. For example, the proportion of uplink and downlink transmissions of the cell in a long period of time may be determined according to the ratio of the uplink service and the downlink service of the current cell, or the transmission in each transmission time interval (TTI) may be dynamically scheduled. .
- TTI transmission time interval
- the serving cell and the neighboring cell may perform uplink or downlink transmission simultaneously in the same frequency band, and each cell may separately perform uplink and downlink transmission configuration.
- the uneven distribution of the location of the terminal equipment and the independent transmission configuration of the serving cell and the neighboring cell enable the type of signal received by the serving cell base station to increase, such as the uplink signal of the served terminal equipment, the downlink signal of the neighboring base station, and even the neighboring area service.
- the uplink signal of the terminal device, the scheduling requirement of the serving cell base station for the uplink transmission of the terminal device is also increasing, and the existing timing alignment cannot meet the service requirement of the serving cell base station.
- the present invention provides a communication method, a base station, and a terminal device, so that the base station can instruct the terminal device to perform uplink subframe scheduling to meet various requirements of uplink timing.
- a communication method comprising:
- the first base station determines a first time adjustment parameter and a second time adjustment parameter
- the first base station sends the first time adjustment parameter and the second time adjustment parameter to the terminal device, where the first time adjustment parameter and the second time adjustment parameter are used to indicate the terminal device Transmitting a first timing advance amount and a second timing advance amount of the uplink signal to the first base station;
- the first base station sends first indication information to the terminal device, where the first indication information is used to instruct the terminal device to adopt one of the first timing advance amount and the second timing advance amount.
- a communication method comprising:
- the terminal device receives the first time adjustment parameter and the second time adjustment parameter from the first base station, where the first time adjustment parameter and the second time adjustment parameter are used to instruct the terminal device to send an uplink signal to the first base station.
- First timing advance amount and second timing advance amount are used to instruct the terminal device to send an uplink signal to the first base station.
- the terminal device receives first indication information from the first base station, where the first indication information is used to indicate one of the first timing advance amount and the second timing advance amount;
- the terminal device uses the determined timing advance to perform uplink signal transmission.
- a first base station comprising:
- a processing unit configured to determine a first time adjustment parameter and a second time adjustment parameter
- a sending unit configured to send the first time adjustment parameter and the second time adjustment parameter to the terminal device, where the first time adjustment parameter and the second time adjustment parameter are used to indicate the terminal device Transmitting, to the first base station, a first timing advance amount and a second timing advance amount of the uplink signal;
- the sending unit is further configured to send the first indication information to the terminal device, where the first indication information is used to indicate that the terminal device adopts one of the first timing advance amount and the second timing advance amount. .
- a terminal device comprising:
- a receiving unit configured to receive, by the first base station, a first time adjustment parameter and a second time adjustment parameter, where the first time adjustment parameter and the second time adjustment parameter are used to indicate that the terminal device is to the first base station Transmitting a first timing advance amount and a second timing advance amount of the uplink signal; the receiving unit is further configured to receive first indication information from the first base station, where the first indication information is used to indicate the first timing advance One of the quantity and the second timing advance;
- a processing unit configured to determine one of the first timing advance amount and the second timing advance amount according to the first indication information
- a sending unit configured to perform transmission of the uplink signal by using the determined timing advance amount.
- a method for transmitting information including:
- the first base station determines a first time adjustment parameter and a second time adjustment parameter
- the first base station sends the first time adjustment parameter and the second time adjustment parameter to the terminal device, where the first time adjustment parameter and the second time adjustment parameter are respectively used by the terminal device Determining a timing advance amount for transmitting an uplink signal to the first base station;
- the first base station sends first indication information to the terminal device, where the first indication information indicates the first One of a time adjustment parameter and the second time adjustment parameter.
- the first base station may perform timing on the uplink signal of the terminal device it serves according to multiple timings, and implement flexible and efficient uplink subframe scheduling.
- the first base station determines the first time adjustment parameter, including:
- the first base station determines the first time adjustment parameter according to an arrival time of the interference signal, where the interference signal is a downlink signal sent by the interference base station, and the interference base station and the first base station use the same frequency band.
- the first time adjustment parameter is determined by the arrival time of the interference signal, so that the first base station can perform timing advancement on the uplink signal of the terminal device according to the presence of the interference signal to meet the processing requirement for the interference signal.
- the first time adjustment parameter is used by the terminal device to adjust a start time of the first time period, so that an uplink signal sent in the first time period is at the time of arrival of the first base station,
- the interference signal is aligned on the time domain symbol at the arrival time of the first base station;
- the first time period is a duration that the terminal device sends the uplink signal to the first base station.
- the setting of the first time adjustment parameter can realize that the interference signal and the uplink signal are aligned on the time domain symbol at the arrival time of the first base station, so that the first base station deletes the interference signal, separates the useful signal, and improves the transmission efficiency.
- the first base station determines a length of the first time period
- the first base station sends second indication information to the terminal device, where the second indication information is used to indicate a subframe format, where the subframe format includes a time domain symbol number, a symbol start position, and a symbol end position. At least one
- the subframe format is such that the first time period does not overlap with a next subframe of the first subframe in which the first time period is located or the first time period and the first time segment are located.
- the portions of the next subframe of a subframe other than the cyclic prefix portion do not overlap.
- the subframe format indicated by the second indication information is a subframe format of the first time period and/or a subframe format of a next subframe of the first time period.
- the first base station determines a second time adjustment parameter, including:
- the second time adjustment parameter is configured to adjust a start time of the first time period to an arrival time of the first base station and an uplink signal reception time of the first base station corresponding to the first time period. Align on the domain symbol;
- the first time period is a duration in which the terminal device sends an uplink signal to the first base station.
- the first base station sends the first time adjustment parameter and the second time adjustment parameter to the terminal device, including:
- the first base station sends the first time adjustment parameter and the second time adjustment parameter to the terminal device in a semi-static manner.
- a method for receiving information including:
- the terminal device receives the first time adjustment parameter and the second time adjustment parameter from the first base station, where the first time adjustment parameter and the second time adjustment parameter are used by the terminal device to determine to send an uplink to the first base station, respectively. Timing of the signal;
- the terminal device receives first indication information from the first base station, where the first indication information indicates one of the first time adjustment parameter and the second time adjustment parameter;
- the terminal device determines, according to the first indication information, a sending start time of an uplink signal, and sends the uplink signal to the first base station.
- the terminal device determines, according to the first indication information, a sending start time of the uplink signal, and sends the uplink signal to the first base station, including:
- the first indication information indicates the first time adjustment parameter
- the interference signal is a downlink signal sent by the interfering base station, and the interfering base station and the first base station use the same frequency band.
- the terminal device receives second indication information from the first base station, where the second indication information is used to indicate a subframe format, where the subframe format includes a time domain symbol number, a symbol start position, and a symbol. At least one of the end positions, the subframe format is such that the uplink signal does not overlap with a next subframe of the first subframe in which the uplink signal is located, or the uplink signal and the uplink signal are located The portions of the next subframe of a subframe other than the cyclic prefix portion do not overlap.
- the subframe format indicated by the second indication information is a subframe format in which the uplink signal is located and/or a subframe format of a next subframe in a subframe in which the uplink signal is located;
- the terminal device sends, according to the subframe format, a subframe in which the uplink signal is located, or a next subframe in a subframe in which the uplink signal is located, to the first base station.
- the terminal device determines, according to the first indication information, a sending start time of the uplink signal, and sends the uplink signal to the first base station, including:
- the first indication information indicates the second time adjustment parameter
- a first base station including:
- a processing unit configured to determine a first time adjustment parameter and a second time adjustment parameter
- a sending unit configured to send the first time adjustment parameter and the second time adjustment parameter to the terminal device, and send the first indication information to the terminal device, where the first indication information indicates the first One of a time adjustment parameter and the second time adjustment parameter;
- the first time adjustment parameter and the second time adjustment parameter are respectively used by the terminal device to determine a timing of sending an uplink signal to the first base station.
- the processing unit is configured to determine the first time adjustment parameter according to an arrival time of the interference signal, where
- the interference signal is a downlink signal sent by the interference base station, and the interference base station and the first base station use the same frequency band.
- the first time adjustment parameter is used to adjust a start time of the first time period to an arrival time of the first base station corresponding to the first time period and the interference signal in the The arrival time of a base station is aligned on the time domain symbol, and the first time period is a duration in which the terminal device sends an uplink signal to the first base station.
- the processing unit is further configured to determine a length of the first time period
- the sending unit sends the second indication information to the terminal device, where the second indication information is used to indicate a subframe format, where the subframe format includes at least a time domain symbol number, a symbol start position, and a symbol end position.
- the subframe format is such that the first time period does not overlap with a next subframe of a first subframe in which the first time period is located or causes the first time period and the first time period The portion of the next subframe in which the first subframe of the first subframe is located other than the cyclic prefix portion does not overlap.
- the subframe format indicated by the second indication information is a subframe format of the first time period and/or a subframe format of a next subframe of the first time period.
- the processing unit is configured to determine the second time adjustment parameter according to a receiving time of the uplink signal
- the second time adjustment parameter is used to adjust a start time of the first time period to an arrival time of the first base station and an uplink signal reception time of the first base station corresponding to the first time period. Aligning on the time domain symbol; the first time period is a duration in which the terminal device sends an uplink signal to the first base station.
- the sending unit sends the first time adjustment parameter and the second time adjustment parameter to the terminal device in a semi-static manner.
- a fourth aspect provides a terminal device, where the terminal device includes:
- a receiving unit configured to receive a first time adjustment parameter and a second time adjustment parameter from the first base station; and receive first indication information from the first base station, where the first indication information indicates the first time adjustment parameter And one of the second time adjustment parameters;
- a processing unit configured to determine, according to the first indication information, a sending start time of the uplink signal
- a sending unit configured to send the uplink signal to the first base station according to a sending start time of the uplink signal
- the first time adjustment parameter and the second time adjustment parameter are respectively used by the terminal device to determine a timing of sending an uplink signal to the first base station.
- the first indication information indicates the first time adjustment parameter
- the processing unit is configured to determine, according to the first indication information, a sending start time of the uplink signal according to the following manner:
- the interference signal is a downlink signal sent by the interfering base station, and the interfering base station and the first base station adopt the same frequency band.
- the receiving unit is further configured to receive second indication information from the first base station, where the second indication information is used to indicate a subframe format, where the subframe format includes a time domain symbol number, and a symbol start At least one of a location and a symbol end position, the subframe format such that the uplink signal does not overlap with a next subframe of a first subframe in which the uplink signal is located or causes the uplink signal and the uplink signal The portion of the next subframe in which the first subframe of the first subframe is located other than the cyclic prefix portion does not overlap.
- the subframe format indicated by the second indication information is a subframe format in which the uplink signal is located and/or a subframe format of a next subframe in a subframe in which the uplink signal is located;
- the sending unit is configured to send an uplink signal to the first base station according to the following manner:
- the first indication information indicates the second time adjustment parameter
- the processing unit is configured to determine, according to the first indication information, a sending start time of the uplink signal according to the following manner:
- the first indication information includes a notification of whether to perform an interference deletion operation within a period of time; the notification is used to indicate one of the first time adjustment parameter and the second time adjustment parameter.
- the first time period is a first uplink subframe or an uplink symbol in the first subframe.
- the first time adjustment parameter is one or more first time adjustment parameters.
- the first time adjustment parameter is dedicated to the terminal device, or the first time adjustment parameter is shared by a terminal device in a cell under the first base station.
- the corresponding functional unit may be implemented by corresponding hardware, or may be executed by corresponding hardware.
- the foregoing sending unit may have The hardware that performs the functions of the foregoing sending unit, such as a transmitter, may also be a general processor or other hardware device capable of executing a corresponding computer program to perform the aforementioned functions; and the processing unit as described above may be a hardware having the function of executing the processing unit.
- the processor may be another hardware device capable of executing a corresponding computer program to perform the foregoing functions; for example, the foregoing receiving unit may be hardware having a function of executing the foregoing receiving unit, such as a receiver, or may be executable.
- a general processor or other hardware device that completes the aforementioned functions by the corresponding computer program.
- the embodiment of the present invention provides a method for transmitting and receiving information, and a base station and a terminal device.
- the first base station serving as the serving base station configures a plurality of time adjustment parameters for the terminal device to control the transmission timing of the uplink signal of the terminal device.
- FIG. 1 is a schematic diagram of a wireless communication system according to an embodiment of the present invention.
- FIG. 2 is a schematic diagram of a prior art timing relationship
- FIG. 3 is a schematic flowchart of a method for sending and receiving information according to an embodiment of the present invention
- FIG. 4 is a schematic diagram of a timing relationship before a subframe structure adjustment according to an embodiment of the present invention.
- FIG. 5 is a schematic diagram of a timing relationship 1 using a short frame structure according to an embodiment of the present invention.
- FIG. 6 is a schematic diagram of a timing relationship 2 using a short frame structure according to an embodiment of the present invention.
- FIG. 7 is a schematic diagram of a timing relationship in a case of a self-contained subframe according to an embodiment of the present invention.
- FIG. 8 is a schematic structural diagram of a first base station according to an embodiment of the present disclosure.
- FIG. 9 is a schematic structural diagram of a terminal device according to an embodiment of the present invention.
- FIG. 1 is a schematic diagram of an application scenario according to an embodiment of the present invention.
- the wireless communication system of the embodiment of the present invention is applied to a communication system operating in a flexible duplex mode or in a communication system of a dynamic TDD.
- the wireless communication system system of the embodiment of the present invention includes: a first base station, one or more second base stations, and a terminal device, where the terminal device is within the coverage of the first base station, and the first base station is The serving base station of the terminal device, that is, the base station to which the terminal device accesses, provides services for the terminal device through the serving cell, and the second base station is the neighboring base station of the first base station.
- the base station of the serving cell when the serving cell performs uplink transmission and one or more cells adjacent to the serving cell perform downlink transmission, since the transmission power of the base station is much larger than the transmission power of the terminal equipment, the base station of the serving cell will be The terminal device that receives the serving cell sends the uplink information, and also receives the downlink signal sent by the base station of the neighboring cell, so that the downlink signal causes serious interference to the uplink signal sent by the terminal device.
- the second base station is also referred to as an interference base station.
- FIG. 2 is a schematic diagram of a prior art timing relationship.
- the position indicated by the vertical solid line is the starting position (or ending position) of the downlink subframe used by the serving base station and the interfering base station to transmit the downlink signal
- the position indicated by the vertical dotted line is used by the serving base station to receive the serving cell.
- the starting position (or ending position) of the uplink subframe of the uplink signal sent by the terminal device can be seen that the timing advance of the receiving position of the uplink subframe relative to the transmitting position of the downlink subframe is N TA offset .
- the advance amount N TA offset is a statically configured parameter in the prior art, and is used by the base station (including the serving base station and the interfering base station) to determine a time position for receiving an uplink signal carried by the uplink subframe.
- the terminal device determines, according to the N TA offset and the parameter N TA dedicated to the terminal device, the starting position of the uplink subframe, where the parameter N TA is used by the serving base station to notify the terminal device by using semi-static signaling. For the terminal to adjust the position of the uplink subframe, that is, if the N TA offset is 0, the arrival time of the uplink subframe is aligned with the downlink subframe transmission time.
- the circular arc frame labeled as the uplink transmission of the terminal device in FIG. 2 indicates the time domain position of the uplink subframe used by the terminal device to transmit the uplink signal
- the circular arc frame indicated by the terminal device as the uplink reaches indicates the uplink sent by the terminal device.
- the time domain of the signal arriving at the serving base station, and the circular arc frame marked as the downlink transmission of the interfering base station indicates the time domain position of the downlink subframe used by the neighboring base station (ie, the second base station) to transmit the downlink signal, and is marked as the downlink arrival of the interfering base station.
- the circular arc rectangle indicates the time domain location of the downlink signal sent by the neighboring base station to the serving base station.
- the N TA offset is configured in the prior art, and the downlink subframes of the serving base station and the adjacent interfering base stations are transmitted in the same frequency, resulting in multiple uplink and downlink signals with deviations in timing, and the serving base station serves the same. There may be multiple timing requirements for the uplink subframe of the terminal device.
- the base station may further configure at least one time adjustment parameter for the terminal device to perform according to different timing requirements of the base station, in the information transmission and reception method provided by the embodiment of the present invention. Uplink signal transmission time adjustment.
- the terminal device may be a device that provides voice and/or data connectivity to a user, a handheld device with a wireless connection function, or other processing device connected to a 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 voice 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 base station includes, but is not limited to, a macro base station, a micro base station, a pico base station, and a pico remote radio unit (pRRU) and a radio remote unit (Remote) belonging to the same macro base station.
- Radio Head (RRH), etc. one or more of pRRUs and RRHs belonging to different macro base stations.
- the base station may be a base station in a Global System for Mobile communications (GSM) system or a Code Division Multiple Access (CDMA) system, or may be a Wideband Code Division Multiple Access (Wideband Code Division).
- GSM Global System for Mobile communications
- CDMA Code Division Multiple Access
- Wideband Code Division Wideband Code Division Multiple Access
- a base station (NodeB) in a multiple access wireless (WCDMA) system may also be an evolved base station (eNB or e-NodeB) in LTE, which is not limited in this application.
- the embodiment of the invention provides a communication method, which specifically includes:
- Step 101 The first base station determines a first time adjustment parameter and a second time adjustment parameter.
- Step 102 The first base station sends the first time adjustment parameter and the second time adjustment parameter to the terminal device, where the first time adjustment parameter and the second time adjustment parameter are used to indicate
- the terminal device sends a first timing advance amount and a second timing advance amount of the uplink signal to the first base station.
- Step 103 The first base station sends first indication information to the terminal device, where the first indication information is used to indicate that the terminal device adopts the first timing advance amount and the second timing advance amount.
- the first base station determines the second time adjustment parameter according to the random access preamble signal sent by the terminal device.
- the first base station may also be based on interference
- the first time adjustment parameter is determined by the arrival time of the signal, where the interference signal is a downlink signal sent by the interfering base station, and the interfering base station and the first base station use the same frequency band.
- the first timing advance is configured such that a symbol of the uplink signal is aligned with a symbol of the interference signal.
- the first indication information is used to indicate that the terminal device adopts the first timing advance amount for the first transmission time unit.
- the first time adjustment parameter is used to indicate an offset
- the offset is an offset of the first timing advance amount relative to the second timing advance amount
- the first base station sends second indication information to the terminal device, where the second indication information is used to indicate the number of valid symbols in the first transmission time unit or the second The number of valid symbols of the transmission time unit; the second transmission time unit being the last transmission time unit or the next transmission time unit of the first transmission time unit.
- the number of valid symbols in the first transmission time unit is greater than the number of valid symbols in the second transmission time unit, or the number of valid symbols in the first transmission time unit is smaller than the second transmission time unit. The number of valid symbols.
- the second transmission time unit is a transmission time unit that performs the uplink signal transmission by using the second timing advance quantity, or the second transmission time unit is a transmission time unit that performs downlink signal transmission; And when the first timing advance amount is greater than the second timing advance amount, the second transmission time unit is a previous transmission time unit of the first transmission time unit; and/or when the first timing When the advance amount is less than the second timing advance amount, the second transmission time unit is a next transmission time unit of the second transmission time unit.
- the first transmission time period is a time period for performing the uplink signal transmission by using the first timing advance amount for the first transmission time unit
- the second transmission time period is for the second transmission time unit
- the second transmission period is a period of time for performing downlink signal transmission, and the first transmission period and the second transmission period Do not overlap, or parts other than the cyclic prefix do not overlap.
- the first indication information includes a notification of whether to perform an interference deletion operation within a period of time.
- the first time adjustment parameter is dedicated to the terminal device, or the first time adjustment parameter is shared by a terminal device in a cell under the first base station.
- the first base station sends the first time adjustment parameter and the second time adjustment parameter to the terminal device, including:
- the first base station sends the first time adjustment parameter and the second time adjustment parameter to the terminal device in a semi-static manner.
- the embodiment of the invention further provides a communication method, which specifically includes:
- the terminal device receives the first time adjustment parameter and the second time adjustment parameter from the first base station, where the first time adjustment parameter and the second time adjustment parameter are used to instruct the terminal device to send an uplink signal to the first base station.
- First timing advance amount and second timing advance amount are used to instruct the terminal device to send an uplink signal to the first base station.
- the terminal device receives first indication information from the first base station, where the first indication information is used to indicate one of the first timing advance amount and the second timing advance amount;
- the terminal device uses the determined timing advance to perform uplink signal transmission.
- the method before the terminal device receives the first time adjustment parameter and the second time adjustment parameter from the first base station, the method further includes: the terminal device sending the random to the first base station And accessing a preamble signal, where the random access preamble is used to determine the second time adjustment parameter.
- the first timing advance is configured such that a symbol of the uplink signal is aligned with a symbol of the interference signal.
- the first indication information is used to indicate that the terminal device adopts the first timing advance amount for the first transmission time unit.
- the terminal device receives second indication information from the first base station, where the second indication information is used to indicate a valid number of symbols or a second transmission in the first transmission time unit The number of valid symbols of the time unit; the second transmission time unit being the last transmission time unit or the next transmission time unit of the first transmission time unit.
- the number of valid symbols in the first transmission time unit is greater than the number of valid symbols in the second transmission time unit, or the number of valid symbols in the first transmission time unit is smaller than the second transmission time unit. The number of valid symbols.
- the second transmission time unit is a transmission time unit that performs the uplink signal transmission by using the second timing advance quantity, or the second transmission time unit is a transmission time unit that performs downlink signal transmission; And when the first timing advance amount is greater than the second timing advance amount, the second transmission time unit is a previous transmission time unit of the first transmission time unit; and/or when the first timing When the advance amount is less than the second timing advance amount, the second transmission time unit is a next transmission time unit of the second transmission time unit.
- the first transmission time period is a time period for performing the uplink signal transmission by using the first timing advance amount for the first transmission time unit
- the second transmission time period is for the second transmission time unit
- the second transmission period is a period of time for performing downlink signal transmission, and the first transmission period and the second transmission period Do not overlap, or parts other than the cyclic prefix do not overlap.
- the first time adjustment parameter is used to indicate an offset
- the offset is an offset of the first timing advance amount relative to the second timing advance amount
- the first indication information includes a notification of whether to perform an interference deletion operation within a period of time.
- the first time adjustment parameter is dedicated to the terminal device, or the first time adjustment parameter is shared by the terminal device in the cell under the first base station.
- the terminal device receives the first time adjustment parameter and the second time adjustment parameter from the first base station, where the terminal device receives the first time adjustment parameter and the second time from the first base station in a semi-static manner. Adjustment parameter.
- FIG. 3 is a schematic flowchart diagram of a communication method according to an implementation manner of an embodiment of the present invention. The method includes the following steps:
- Step 310 The first base station determines a first time adjustment parameter and a second time adjustment parameter.
- the first base station determines the first and second time adjustment parameters according to a signal transmission delay and/or a timing requirement between the first base station and the terminal device.
- the first and second time adjustment parameters are different uplink timing advances.
- the first time adjustment parameter is a timing parameter, where the timing parameter corresponds to a time requirement, and the terminal device determines an uplink timing advance amount.
- the timing parameter may be an uplink transceiver delay, a downlink transceiver delay, or other related timing parameters.
- the first time adjustment parameter may be one or more first time adjustment parameters.
- the first base station sets index information for each of the first time adjustment parameters, where the index information uniquely corresponds to a first time adjustment parameter.
- the first base station may further set index information for the second time adjustment parameter.
- Step 320 The first base station sends the first time adjustment parameter and the second time adjustment parameter to the terminal device, where the first time adjustment parameter and the second time adjustment parameter are used respectively for the terminal
- the device determines a timing advance amount for transmitting an uplink signal to the first base station
- the terminal device determines a first timing advance amount according to the first time adjustment parameter, and determines a second timing advance amount according to the second time adjustment parameter.
- first and second timing advances may be the same or different.
- the first base station may send the first time adjustment parameter and the second time adjustment parameter to the terminal device by using high layer signaling.
- the first base station may send the first and second time adjustment parameters to the terminal device in a semi-static manner, for example, using Radio Resource Control (RRC) signaling or media connection.
- RRC Radio Resource Control
- MAC media access control
- Step 330 The first base station sends first indication information to the terminal device, where the first indication information indicates one of the first time adjustment parameter and the second time adjustment parameter.
- the terminal device determines, according to the first indication information, the sending time of the first uplink subframe according to at least one of the first time adjustment parameter and the second time adjustment parameter;
- the first indication information may include the index information, and the terminal device determines the first or second time adjustment parameter according to the index information;
- the terminal device determines, according to the first time adjustment parameter or the second time adjustment parameter, the sending time of the first uplink subframe.
- the terminal device uses the first or second time adjustment parameter as an uplink timing advance amount.
- the terminal device determines, according to the first time adjustment parameter and the second time adjustment parameter, the sending time of the first uplink subframe.
- the terminal device obtains an uplink timing advance amount according to the first and second time adjustment parameters.
- the terminal device determines, according to the preset configuration information, a sending start time of the first uplink subframe according to the first indication information.
- the preset configuration information is used to indicate a correspondence between the indication information, the time adjustment parameter, and the timing advance amount, so that the terminal device may, according to the configuration information, after receiving the first indication information, , determining the transmission start time of the uplink signal.
- the preset configuration information may be notified to the terminal device by the base station when the terminal device accesses, for example, by signaling, or pre-configured to the terminal device.
- Step 340 The terminal device sends the uplink signal to the first base station at the sending time.
- Step 350 The first base station determines a receiving time of the uplink signal, and receives an uplink signal sent by the terminal device at the receiving time.
- the embodiment of the present invention provides a method for sending and receiving information, by which the first base station can pre-configure a plurality of time adjustment parameters, and notify the terminal device to perform corresponding uplink signal timing according to different timing requirements, which is a serving cell base station.
- a flexible and efficient uplink subframe scheduling mode is provided to meet various requirements of uplink timing.
- the time window of the uplink reception of the serving base station is compared with the time window of the downlink transmission of the interfering base station, and the advance amount is N TA offset ; the time for the uplink signal to reach the serving base station and the uplink receiving window of the serving base station are satisfied.
- the time point of the uplink transmission of the terminal device needs to be advanced, and the advance amount is expressed as N TA + N TA offset . Since the serving base station and the interfering base station use the same frequency band, the time window of the downlink transmission of the interfering base station is completely aligned with the time window of the downlink transmission of the serving base station.
- the serving base station When the terminal device sends an uplink signal to the serving base station through the first frequency band, and the interfering base station sends the downlink signal by using the same first frequency band, the serving base station receives the uplink signal sent by the terminal device, and also receives the uplink signal sent by the interfering base station. Down signal. In this case, the serving base station needs to delete the part of the received signal from the neighboring base station and recover the uplink signal sent by the terminal device.
- the operation of deleting the part of the received signal from the neighboring base station by the serving base station is referred to as an interference deletion operation, and the part of the signal received by the serving base station from the neighboring base station is referred to as an interference signal.
- the portion of the signal received by the serving base station from the terminal device is referred to as a useful signal.
- the first base station determines a first time adjustment parameter according to an arrival time of the interference signal, where the interference signal is a second base station that uses the same frequency band as the first base station.
- the first base station can perform timing adjustment on the uplink signal of the terminal device according to the received interference signal.
- the first base station determines the arrival time of the interference signal, and the time difference between the time when the interference base station sends the downlink signal and the time when the first base station and the second base station send the downlink signal is N Delay .
- the first base station may also determine that the first time adjustment parameter is
- N TA-IC N Delay .
- the first time adjustment parameter is used to determine a start time of the first uplink subframe, and the first time adjustment parameter adjusts the start time of the first uplink subframe to the first uplink subframe
- the time of arrival of the first base station is aligned with the time of arrival of the interfering signal at the arrival time of the first base station. In this way, the first base station can delete the interference signal part from the interfering base station in the received signal, and recover the uplink signal sent by the terminal device.
- the first time adjustment parameter may be a terminal device-specific parameter, that is, each terminal device in the first cell under the first base station is configured with independent parameters, and at least two terminal devices receive The first time adjustment parameter may be the same, but the serving base station separately configures the first time adjustment parameter to the at least two terminal devices.
- the first parameter may also be a cell-specific parameter.
- the cell-specific parameter means that the terminal devices in the first cell under the first base station share the same first time adjustment parameter.
- the first base station determines a time advance parameter N TA in the prior art as a second time adjustment parameter.
- the first base station determines that the N TA changes, the first base station sends a new N TA to the terminal device, and the new N TA index
- the information is the same as the index information of the original N TA , and the terminal device updates the corresponding N TA value according to the index information.
- the first indication information indicates one of the first or second time adjustment parameters:
- the terminal device determines a transmission time of the first uplink subframe according to the NTA-IC ;
- the terminal device determines the first uplink subframe according to the parameter N TA-IC and the parameter N TA offset in the prior art.
- the transmission timing advance amount is (N TA-IC + N TA offset ).
- the terminal device determines the first uplink subframe according to the parameter N TA-IC and the parameters N TA offset and N TA in the prior art.
- the transmission timing advance amount is (N TA - N TA - IC + N TA offset ).
- the terminal device determines the transmission time of the uplink subframe according to the second time adjustment parameter, for example, the parameter N TA in the prior art.
- the embodiment of the present invention may further include:
- the first base station determines, according to its distance from each interfering base station, a first time adjustment parameter corresponding to each of the interfering base stations, where the first time adjustment parameter is used to use the first uplink subframe
- the start time is adjusted to be that the interference signal of the interfering base station corresponding to the first time adjustment parameter of the first uplink subframe at the time of arrival of the first base station is at the time of arrival of the first base station Align on the field symbol.
- the first base station sends the at least one first time adjustment parameter and the second time adjustment parameter to the terminal device.
- step 330 the embodiment of the present invention further includes:
- the first base station receives the interference signal, and generates first indication information, where the first indication information indicates a first time adjustment parameter corresponding to the interference base station from which the interference signal is derived.
- the serving base station configures a newly defined timing parameter, and configures a new transmission sequence for the terminal device, so that the uplink signal sent by the terminal device reaches the time when the downlink signal sent by the serving base station and the interfering base station arrives at the serving base station in the time domain. Align the symbols. In this way, the serving base station can delete the part of the received signal from the downlink signal of the interfering base station, so that when the uplink transmit power of the terminal is low, the uplink signal sent by the terminal device can be recovered, and the power consumption of the terminal device is reduced. To improve the energy efficiency of the network.
- the first indication information in step 330 may further indicate that an interference deletion operation is required in the first subframe or in a period of time.
- the first base station dynamically sends indication information to the terminal device, to indicate whether an interference deletion operation is performed in the first subframe.
- the first subframe may be a specific subframe.
- the indication information may be a field in a physical downlink control channel (PDCCH) for scheduling the first subframe.
- PDCCH physical downlink control channel
- the terminal device determines the start time of the first subframe according to the first time adjustment parameter in step 330.
- the terminal device determines the start time of the first subframe according to the second time adjustment parameter, for example, the parameter N TA in the prior art.
- the indication information may be 1 bit, for example, as shown in Table 1:
- the first time adjustment parameter is one or more
- the first base station dynamically sends indication information to the terminal device, to indicate whether interference deletion is performed in the first subframe.
- the indication information when the indication information indicates that an interference deletion operation is performed in the first subframe, the indication information simultaneously indicates one of the first time adjustment parameters that determine an uplink transmission timing.
- the indication information includes index information, where the index information is used to indicate one of the first time adjustment parameters N TA-IC .
- the index information is preset by the first base station according to the neighboring interfering base station, and the setting rule of the index information may be determined by the first base station, and the first time adjustment parameter corresponding to the different interfering base station is distinguished, and the specific setting rule is specified. There is no limit here.
- the indication information may be 2 bits, for example, when the first base station has the first interfering base station, the second interfering base station, and the third interfering base station, as shown in Table 2.
- the number of adjacent interfering base stations of the first base station may be multiple.
- the integer is used as the interfering base station in the interference deletion scenario.
- the selection mode may be determined by the base station according to actual communication requirements, and is not specifically limited herein.
- the first indication information may be selectively set to be included in the first subframe or the interference deletion operation needs to be performed within a period of time, and the first indication information may only indicate one The first time adjustment parameter or the second time adjustment parameter, the terminal device performs uplink transmission timing according to the first or second time adjustment parameter.
- the first base station sends the first indication information to the terminal device in a semi-static manner to indicate that the interference deletion operation is performed within a period of time.
- the terminal device determines the transmission time of the uplink subframe according to the first time adjustment parameter indicated by the indication information in the time indicated by the indication information.
- the uplink subframe that performs interference cancellation will overlap with the subsequent subframe, which affects the normal transmission of the subsequent subframe.
- the first uplink subframe that is, the subframe that is marked as the uplink of the terminal device
- the right border of the circular rectangle that is marked as the uplink of the terminal device will cross.
- the circular arc frame labeled as the downlink of the serving base station To the right of the vertical dotted line on the right side, to partially overlap with the circular arc frame labeled as the downlink of the serving base station. In this case, the downlink transmission of the serving base station is affected.
- the short subframe format designed by the embodiment of the present invention can avoid overlapping of the uplink subframe and the subsequent downlink subframe.
- Figure 5 shows a short frame for the first uplink subframe
- Figure 6 uses a short frame for the next subframe of the first uplink subframe, as indicated by the circular rectangle of the uplink received by the serving base station
- Figure 7 A short frame is used for both the first uplink subframe and the first subframe of the first uplink subframe.
- the embodiment of the present invention may further include:
- the first base station determines a subframe format in which the terminal device performs uplink transmission, where the subframe format is a subframe format that is less than or equal to 1 ms, and the subframe format is such that the first uplink subframe is Not overlapping with the next subframe of the first uplink subframe or the first subframe of the first uplink subframe and the next subframe of the first uplink subframe except the cyclic prefix (CP) portion Some do not overlap; and
- CP cyclic prefix
- Step 330a2 the first base station notifies the terminal device of the subframe format
- the base station may not notify the terminal device of the subframe format.
- the subframe format is notified to the terminal device, so that the symbol of the interference deletion subframe (ie, the first uplink subframe) does not affect the normal transmission of the next subframe of the first uplink subframe. receive.
- the first base station and the terminal device pre-define a new subframe format adopted by the uplink transmission, where the new subframe format may be one or more, and the new subframe format includes
- the format of the interference deletion subframe may also include a format for the non-interference deletion subframe.
- the subframe format includes the number of symbols included in the subframe, At least one of a sequence number of a start symbol in a subframe and a sequence number of an end symbol in the subframe.
- the existing LTE or LTE-A system may include 14 symbols in one subframe, and the newly defined subframe format in the embodiment of the present invention may be 10 symbols, that is, only 10 of the existing 14 symbols.
- the transmission signal is transmitted, for example, the signal is transmitted on the 10 symbols whose serial number is 3, and the end symbol is 12, and the remaining 4 symbols (ie, symbols 0-2 and 13) are not used for transmitting signals.
- the subframe format may be a subframe format for the first uplink subframe, or may be a subframe format for a next subframe of the first uplink subframe, or may be for the first uplink. a subframe and a subframe format of a next subframe of the first uplink subframe.
- the first base station dynamically notifies the terminal device of the first uplink subframe and/or the subframe format adopted by the next subframe of the first uplink subframe,
- the subframe format can be notified by separate signaling.
- the first base station may further notify the subframe format together with the indication information in step 330 above. That is, the indication information in step 330 simultaneously indicates the subframe format determined by the first base station.
- the base station may use 2 bits to notify whether the first uplink subframe performs interference cancellation and a subframe format of the first uplink subframe and/or the next subframe of the first uplink subframe, For example, when the two bits are 00, it indicates that the first subframe does not perform interference cancellation, and the subframe format is format 0.
- Interference deletion Subframe format 00 The first subframe does not interfere with deletion. Format 0 01 First subframe for interference removal Format 0 10 First subframe for interference removal Format 1 11 First subframe for interference removal Format 2
- the first base station semi-statically configures the format of the uplink subframe in the terminal device for a period of time, or configures the uplink subframe used by the terminal device to perform interference cancellation in a period of time.
- Subframe format For example, the first base station indicates the format of the uplink subframe in a period of time by using high layer signaling such as MAC layer signaling or radio resource control (RRC) signaling.
- RRC radio resource control
- the terminal device determines the transmission time of the uplink subframe according to the first time adjustment parameter within a time indicated by the indication information.
- step 330 may be performed together with step 320, that is, the first base station sends the first time adjustment parameter and the second time adjustment parameter to the terminal device. At the same time, the first indication information is also sent to the terminal device.
- FIG. 5 shows a timing relationship 1 according to an embodiment of the present invention.
- the time domain position illustrated in the figure can be referred to the description above, and will not be described again here.
- the parameter N TA-IC in FIG. 5 is the first time adjustment parameter in the embodiment of the present invention, and the parameter N TA-IC is obtained by the first base station according to the downlink signal sent by the interfering base station to the first base station.
- the time and the time at which the terminal device sends an uplink signal to the first base station are determined.
- the first base station sends the parameter N TA-IC to the terminal device, and the terminal device determines, according to the parameter N TA-IC, a starting position of the uplink signal sent by the terminal device.
- the time domain starting position of the uplink subframe in which the terminal device sends the uplink signal is adjusted, and the arrival time of the uplink signal reaches the first base station (that is, the uplink)
- the arrival time corresponding to the subframe is symbolically aligned with the time domain position of the downlink signal of the interfering base station reaching the first base station.
- the start position of the arrival time of the uplink signal to the first base station and the start time position of the downlink signal of the interfering base station arrive at the first base station are exactly aligned.
- the embodiment of the present invention is not limited thereto, and the initial position alignment is only a special case.
- the start time of the uplink signal arriving at the first base station and the time domain position of the downlink signal of the interfering base station reaching the first base station are symbolically aligned, and the starting positions of the two may not be aligned.
- the first base station only needs to perform interference cancellation on the part of the uplink signal superimposed with the interference signal.
- the length of the uplink subframe in which the terminal device sends the uplink signal is also shortened, so that the time domain end position of the uplink signal reaching the first base station ends when the first base station receives the uplink subframe time domain.
- the subframe format is a subframe format for the first uplink subframe.
- FIG. 6 is a schematic diagram showing a timing relationship 2 according to an embodiment of the present invention. Different from FIG. 5, in FIG. 6, the short frame is used for the next subframe of the first uplink subframe, as indicated by the circular rectangle of the uplink received by the serving base station.
- the subframe format is a subframe format for the next subframe of the first uplink subframe.
- FIG. 7 is a schematic diagram of a timing relationship 3 according to an embodiment of the present invention.
- short frames are used for the first uplink subframe and the next subframe of the first uplink subframe.
- the subframe format is a subframe format for the next subframe of the first uplink subframe.
- the first uplink subframe and the next subframe of the first uplink subframe may be in the same subframe format.
- the first uplink subframe and the next subframe of the first uplink subframe may also be used.
- Different sub-frame formats are used for the first uplink subframe and the next subframe of the first uplink subframe.
- the embodiment of the present invention can also be applied to a scenario in which a self-contained subframe is used for transmission.
- the base station including the serving base station and the interfering base station
- the base station performs downlink transmission first, as shown in FIG. 7 as an arc rectangle sent by the base station, and then receives again in the time interval.
- the uplink signal sent by the terminal device is marked as an arc rectangle of the terminal device reaching up as shown in FIG. It can be seen that the serving base station receives the uplink signal and also receives a part of the downlink signal sent by the interfering base station, as shown in the portion between the two vertical dashed lines in FIG.
- the embodiment of the present invention can adjust the starting position of the uplink signal sent by the terminal device by using the value of the parameter N TA-IC of the device, so that the time when the uplink signal of the terminal device reaches the serving base station and the downlink signal sent by the interfering base station arrive at the serving base station.
- the time is aligned on the time domain symbols, so that the serving cell base station can perform interference cancellation on the downlink signal of the interfering base station.
- each terminal device has only one parameter for determining the time point of the uplink signal transmission, and the uplink signal sent by the terminal device cannot be aligned with the downlink signal sent by the neighboring base station at the serving base station.
- the first time adjustment parameter is set, so that the uplink signal sent by the terminal device and the downlink signal sent by the neighboring base station are aligned on the time domain symbol at the serving cell base station, thereby implementing interference deletion.
- FIG. 8 is a schematic diagram showing a possible structure of a first base station involved in the first embodiment of the present invention.
- the first base station includes a processing unit 801, a sending unit 802, and a receiving unit 803, and may further include a storage unit (not shown) according to actual needs.
- the processing unit 801 is configured to determine a first time adjustment parameter and a second time adjustment parameter
- the sending unit 802 is configured to send the first time adjustment parameter and the second time adjustment parameter to the terminal device;
- the sending unit 802 is further configured to send, to the terminal device, first indication information, where the first indication information indicates one of the first time adjustment parameter and the second time adjustment parameter;
- the receiving unit 803 is configured to receive an uplink signal sent by the terminal device.
- the first base station is a serving base station of the terminal device; the first time adjustment parameter and the second time adjustment parameter are respectively used by the terminal device to determine a timing of sending an uplink signal to the first base station.
- the processing unit 801 is further configured to determine the first time adjustment parameter according to an arrival time of the interference signal, where the interference signal is a slave base station received by the receiving unit 803. Sending a downlink signal, where the interfering base station and the first base station use the same frequency band;
- the first time adjustment parameter is used to adjust a start time of the first time period to an arrival time of the first base station corresponding to the first time period and the first time of the interference signal.
- the time of arrival of the base station is aligned on the time domain symbol; wherein the first time period is a duration in which the terminal device sends an uplink signal to the first base station.
- the processing unit 801 is further configured to determine a length of the first time period, and then, according to the length, the sending unit 802 sends second indication information, the second indication information, to the terminal device.
- the subframe format includes at least one of a time domain symbol number, a symbol start position, and a symbol end position, the subframe format causing the first time period and the first time The next subframe of the first subframe in which the segment is located does not overlap or the first time segment does not overlap with the portion of the next subframe of the first subframe in which the first time segment is located except the cyclic prefix portion. .
- the subframe format indicated by the second indication information is a subframe format of the first time period and/or a subframe format of a next subframe of the first time period.
- the processing unit 801 is configured to determine, according to a receiving time of the uplink signal, the second time adjustment parameter
- the second time adjustment parameter is used to adjust a start time of the first time period to an uplink signal of the first base station and an uplink signal of the first base station corresponding to the first time period.
- the receiving time is aligned on the time domain symbol; wherein the first time period is a duration in which the terminal device sends an uplink signal to the first base station.
- the first indication information includes a notification of whether to perform an interference deletion operation within a period of time; the notification is used to instruct the terminal device to adjust the parameter according to the first time and the second time adjustment One of the parameters determines the start time of the first time period.
- the first time adjustment parameter is one or more time adjustment parameters.
- the processing unit 801 determines at least one interfering base station, where each interfering base station corresponds to a first time adjustment parameter
- the processing unit 801 determines, according to its distance from each interfering base station, a first time adjustment parameter corresponding to each of the interfering base stations, where the first time adjustment parameter is used to use the first uplink subframe.
- the start time is adjusted to be the time of arrival of the first base station and the first time corresponding to the first uplink subframe.
- the interference signals of the interfering base stations corresponding to the parameters are aligned on the time domain symbols at the arrival time of the first base station.
- the sending unit 802 is configured to send the at least one first time adjustment parameter and the second time adjustment parameter to the terminal device.
- the sending unit 802 sends the first time adjustment parameter and the second time adjustment parameter in a semi-static manner.
- each unit of the foregoing first base station performs the information interaction, the execution process, and the like of the method of the embodiment of the present invention.
- the embodiment of the first base station is based on the same concept as the foregoing method embodiment, and the technical effects thereof are the same as those of the method embodiment of the present invention.
- the description in the method embodiment of the present invention and details are not described herein again. .
- FIG. 9 is a schematic diagram showing a possible structure of a terminal device involved in the first embodiment of the present invention.
- the terminal device includes a receiving unit 901, a processing unit 902, and a sending unit 903, and may further include a storage unit (not shown) according to actual needs.
- the receiving unit 901 is configured to receive, by the first base station, a first time adjustment parameter and a second time adjustment parameter;
- the receiving unit 901 is further configured to receive first indication information from the first base station, where the first indication information indicates one of the first time adjustment parameter and the second time adjustment parameter;
- the processing unit 902 determines, according to the first indication information, a sending start time of the uplink signal
- the sending unit 903 is configured to send the uplink signal to the first base station.
- the first base station is a serving base station of the terminal device, and the first time adjustment parameter and the second time adjustment parameter are respectively used by the terminal device to determine a timing of sending an uplink signal to the first base station. .
- the processing unit 902 determines, according to the first indication information, a sending start time of the uplink signal:
- the first indication information indicates the first time adjustment parameter
- the processing unit 902 determines a transmission start time of the uplink signal according to the first time adjustment parameter, so that the uplink signal is in the first
- the arrival time of a base station is aligned with the time of arrival of the interference signal at the first base station in a time domain symbol
- the interference signal is a downlink signal transmitted by the interference base station, and the interference base station and the first base station use the same frequency band.
- the receiving unit 901 receives the second indication information from the first base station, where the second indication information is used to indicate a subframe format, where the subframe format includes a time domain symbol number, a symbol start position, and At least one of the symbol end positions, the subframe format is such that the uplink signal does not overlap with the next subframe of the first subframe in which the uplink signal is located or the uplink signal and the uplink signal are located The portions of the next subframe of the first subframe other than the cyclic prefix portion do not overlap.
- the subframe format indicated by the second indication information is a subframe format in which the uplink signal is located and/or a subframe format of a next subframe in a subframe in which the uplink signal is located.
- the sending unit 903 is configured to send, according to the subframe format, a first subframe where the uplink signal is located, or a next subframe of the subframe where the uplink signal is located, to the first base station.
- the first indication information indicates the second time adjustment parameter
- the processing unit 902 determines a sending start time of the uplink signal according to the second time adjustment parameter, so that the uplink signal is in the The arrival time of the first base station is aligned with the uplink signal reception time of the first base station on the time domain symbol.
- the first indication information includes a notification of whether to perform an interference deletion operation within a period of time; the processor 902 determines the first time adjustment parameter and the second time adjustment according to the notification. One of the parameters.
- the first time adjustment parameter is one or more first time adjustment parameters.
- the receiving unit 901 receives one or more first time adjustment parameters, and a second time adjustment parameter, and receives the first indication information:
- the processing unit 902 determines an uplink signal transmission start time according to the first time adjustment parameter, where the first time adjustment parameter is used to The start time of the first uplink subframe is adjusted to be that the interference signal of the interfering base station corresponding to the first time adjustment parameter of the uplink signal at the arrival time of the first base station arrives at the first base station Time is aligned on the time domain symbol.
- the embodiment of the invention further provides a first base station, including:
- a processing unit configured to determine a first time adjustment parameter and a second time adjustment parameter
- a sending unit configured to send the first time adjustment parameter and the second time adjustment parameter to the terminal device, where the first time adjustment parameter and the second time adjustment parameter are used to indicate the terminal device Transmitting, to the first base station, a first timing advance amount and a second timing advance amount of the uplink signal;
- the sending unit is further configured to send the first indication information to the terminal device, where the first indication information is used to indicate that the terminal device adopts one of the first timing advance amount and the second timing advance amount. .
- the processing unit is configured to determine the first time adjustment parameter according to an arrival time of the interference signal, where the interference signal is a downlink signal sent by the interfering base station, and the interference base station and the The first base station uses the same frequency band.
- the first base station determines a second time adjustment parameter, including:
- the first base station determines the second time adjustment parameter according to the random access preamble signal sent by the terminal device.
- the first timing advance is configured such that a symbol of the uplink signal is aligned with a symbol of the interference signal.
- the first indication information is used to indicate that the terminal device adopts the first timing advance amount for the first transmission time unit.
- the sending unit is further configured to send, to the terminal device, second indication information, where the second indication information is used to indicate a quantity of valid symbols in the first transmission time unit or The number of valid symbols of the second transmission time unit; the second transmission time unit being the last transmission time unit or the next transmission time unit of the first transmission time unit.
- the number of valid symbols in the first transmission time unit is greater than the number of valid symbols in the second transmission time unit, or the number of valid symbols in the first transmission time unit is less than The number of valid symbols for the second transmission time unit.
- the second transmission time unit is performed by using the second timing advance amount
- the transmission time unit of the uplink signal transmission, or the second transmission time unit is a transmission time unit for performing downlink signal transmission;
- the second transmission time unit is a previous transmission time unit of the first transmission time unit.
- the second transmission time unit is a next transmission time unit of the second transmission time unit.
- the first transmission time period is a time period in which the uplink signal transmission is performed by using the first timing advance amount for the first transmission time unit
- the second transmission time period is The second transmission time unit uses the second timing advance amount to perform the time period of the uplink signal transmission, or the second transmission time period is a time period for performing downlink signal transmission;
- the first transmission time period does not overlap with the second transmission time period, or portions other than the cyclic prefix do not overlap.
- the first time adjustment parameter is used to indicate an offset
- the offset is an offset of the first timing advance amount relative to the second timing advance amount
- the first indication information includes a notification of whether to perform an interference deletion operation within a period of time.
- the first time adjustment parameter is dedicated to the terminal device, or the first time adjustment parameter is shared by a terminal device in a cell under the first base station.
- the sending the first time adjustment parameter and the second time adjustment parameter to the terminal device includes:
- the first time adjustment parameter and the second time adjustment parameter are sent to the terminal device in a semi-static manner.
- the embodiment of the invention further provides a terminal device, including:
- a receiving unit configured to receive, by the first base station, a first time adjustment parameter and a second time adjustment parameter, where the first time adjustment parameter and the second time adjustment parameter are used to indicate that the terminal device is to the first base station Transmitting a first timing advance amount and a second timing advance amount of the uplink signal; the receiving unit is further configured to receive first indication information from the first base station, where the first indication information is used to indicate the first timing advance One of the quantity and the second timing advance;
- a processing unit configured to determine one of the first timing advance amount and the second timing advance amount according to the first indication information
- a sending unit configured to perform transmission of the uplink signal by using the determined timing advance amount.
- the sending unit is further configured to send a random access preamble signal to the first base station, where the random access preamble signal is used to determine the second time adjustment parameter.
- the first timing advance is configured such that a symbol of the uplink signal is aligned with a symbol of the interference signal.
- the first indication information is used to indicate that the terminal device is for the first transmission
- the time unit adopts the first timing advance amount.
- the receiving unit is further configured to receive second indication information from the first base station, where the second indication information is used to indicate a valid number of symbols in the first transmission time unit or The number of valid symbols of the second transmission time unit; the second transmission time unit being the last transmission time unit or the next transmission time unit of the first transmission time unit.
- the number of valid symbols in the first transmission time unit is greater than the number of valid symbols in the second transmission time unit, or the number of valid symbols in the first transmission time unit is less than The number of valid symbols for the second transmission time unit.
- the second transmission time unit is a transmission time unit that performs the uplink signal transmission by using the second timing advance amount, or the second transmission time unit is configured to perform downlink signal transmission.
- the second transmission time unit is a previous transmission time unit of the first transmission time unit.
- the second transmission time unit is a next transmission time unit of the second transmission time unit.
- the first transmission time period is a time period in which the uplink signal transmission is performed by using the first timing advance amount for the first transmission time unit
- the second transmission time period is The second transmission time unit uses the second timing advance amount to perform the time period of the uplink signal transmission, or the second transmission time period is a time period for performing downlink signal transmission;
- the first transmission time period does not overlap with the second transmission time period, or portions other than the cyclic prefix do not overlap.
- the first time adjustment parameter is used to indicate an offset
- the offset is an offset of the first timing advance amount relative to the second timing advance amount
- the first indication information includes a notification of whether to perform an interference deletion operation within a period of time.
- the first time adjustment parameter is dedicated to the terminal device, or the first time adjustment parameter is shared by a terminal device in a cell under the first base station.
- the receiving, by the first base station, the first time adjustment parameter and the second time adjustment parameter including: receiving the first time adjustment parameter and the second time from the first base station in a semi-static manner Adjustment parameters.
- each unit of the foregoing terminal device performs the information interaction, the execution process, and the like of the method in the embodiment of the present invention.
- the embodiment of the first base station is based on the same concept as the foregoing method embodiment, and the technical effects thereof are the same as those of the method embodiment of the present invention.
- the description in the method embodiment of the present invention and details are not described herein again. .
- each functional unit is only an example.
- the foregoing functions may be considered according to requirements, such as configuration requirements of corresponding hardware or convenience of implementation of software.
- the allocation is done by different functional units, that is, the internal structure of the user equipment and the base station are divided into different Functional unit to perform all or part of the functions described above.
- the corresponding functional units in this embodiment may be implemented by corresponding hardware, or may be executed by corresponding hardware.
- the foregoing sending unit may have the function of executing the foregoing sending unit.
- Hardware such as a transmitter, may also be a general processor or other hardware device capable of executing a corresponding computer program to perform the aforementioned functions; and the processing unit as described above may be hardware having a function of executing a processing unit, such as a processor. It may also be another hardware device capable of executing a corresponding computer program to perform the aforementioned functions; for example, the foregoing receiving unit may be hardware having a function of executing the foregoing receiving unit, such as a receiver, or may be capable of executing a corresponding computer program to complete A general processor or other hardware device of the foregoing functions (the various described embodiments of the present specification may apply the above described principles).
- the program may be stored in a computer readable storage medium, and the storage medium may include: Read Only Memory (ROM), Random Access Memory (RAM), disk or optical disk.
- ROM Read Only Memory
- RAM Random Access Memory
- B corresponding to A means that B is associated with A, and B can be determined from A.
- determining B from A does not mean that B is only determined based on A, and that B can also be determined based on A and/or other information.
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Abstract
本发明涉及无线通信领域,尤其涉及一种用于终端设备上行定时的信息发送和接收方法、基站以及终端设备。在一种信息发送方法中,第一基站确定第一时间调整参数和第二时间调整参数;所述第一基站将所述第一时间调整参数和所述第二时间调整参数发送给终端设备,其中,所述第一时间调整参数和所述第二时间调整参数分别用于所述终端设备确定向所述第一基站发送上行信号的定时提前量;以及所述第一基站向所述终端设备发送第一指示信息,所述第一指示信息指示所述第一时间调整参数和所述第二时间调整参数中的一个。通过本申请提供的方案,基站为终端设备提供了多个时间调整参数用于进行上行信号定时,为基站提供了灵活、高效的上行子帧调度,以满足上行定时的多种需要。
Description
本申请要求于2016年9月30日提交中国专利局、申请号为201610878498.0、发明名称为“通信方法、基站和终端设备”的中国专利申请的优先权,其全部内容通过引用结合在本申请中。
本发明涉及无线通信领域,尤其涉及一种用于终端设备上行定时的技术.
长期演进(Long Term Evolution,LTE)或长期演进高级(Long Term Evolution Advanced,LTE-A)通信***包含下行传输和上行传输,其中下行传输是指由基站向终端设备传输信息,上行传输是由终端设备向基站传输信息。LTE或LTE-A通信***主要采用频分双工(Frequency Division Duplex,FDD)模式和时分双工(Time Division Duplex,TDD)模式。对于工作在TDD模式下的无线通信***,在一段时间内,整个频段仅可用于下行传输,或整个频段仅可用于上行传输,并且对于同一频段覆盖的区域,该区域内的所有小区在下行频段的时间内必须同为下行传输,或在上行频段的时间内必须同为上行传输。
由于***中的终端设备在位置上分布不均匀,终端设备所应用的通信业务也大相庭径,并且处于同一频段覆盖下的小区在同一时刻的下行业务量和上行业务量差异较大,因此,处于同一频段覆盖下的所有小区采用相同的上行传输配置和下行传输配置,无法高效的满足每个小区的业务需求。灵活双工技术能够对每个小区的上行传输和下行传输进行单独配置,能够有效提升网络传输资源的利用率。例如,可以根据当前小区上行业务和下行业务的比例来确定该小区在一段较长时间内上行传输和下行传输的配比,或者动态调度每个传输时间间隔(Transmission Time Interval,TTI)内的传输。
随着灵活双工的广泛应用,在同一个TTI内,同一个频段内,服务小区和相邻小区可能同时进行上行或下行传输,也可能每个小区单独进行上下行传输配置。终端设备位置的分布不均以及服务小区和相邻小区的独立传输配置,使得服务小区基站接收到的信号种类增加,例如所服务终端设备的上行信号,邻区基站的下行信号,甚至邻区服务终端设备的上行信号,服务小区基站对终端设备上行传输的调度需求也越来越多,现有的上述时序对齐已经不能满足服务小区基站的业务需要。
因此,需要提供一种新的上行子帧调度方法,为服务小区基站提供灵活、高效的上行子帧调度,以满足上行定时的多种需要。
发明内容
本发明提供了一种通信方法、基站以及终端设备,使得基站可以指示终端设备进行上行子帧调度,满足上行定时的多种需要。
一种通信方法,包括:
第一基站确定第一时间调整参数和第二时间调整参数;
所述第一基站将所述第一时间调整参数和所述第二时间调整参数发送给终端设备,其中,所述第一时间调整参数和所述第二时间调整参数用于指示所述终端设备向所述第一基站发送上行信号的第一定时提前量和第二定时提前量;以及
所述第一基站向所述终端设备发送第一指示信息,所述第一指示信息用于指示所述终端设备采用所述第一定时提前量和所述第二定时提前量中的一个。
一种通信方法,包括:
终端设备从第一基站接收第一时间调整参数和第二时间调整参数,所述第一时间调整参数和所述第二时间调整参数用于指示所述终端设备向所述第一基站发送上行信号的第一定时提前量和第二定时提前量;
所述终端设备从所述第一基站接收第一指示信息,所述第一指示信息用于指示所述第一定时提前量和所述第二定时提前量中的一个;
所述终端设备根据所述第一指示信息确定所述第一定时提前量和所述第二定时提前量中的一个;
所述终端设备使用所述确定的定时提前量进行上行信号的传输。
一种第一基站,包括:
处理单元,用于确定第一时间调整参数和第二时间调整参数;
发送单元,用于将所述第一时间调整参数和所述第二时间调整参数发送给终端设备,其中,所述第一时间调整参数和所述第二时间调整参数用于指示所述终端设备向所述第一基站发送上行信号的第一定时提前量和第二定时提前量;
所述发送单元还用于向所述终端设备发送第一指示信息,所述第一指示信息用于指示所述终端设备采用所述第一定时提前量和所述第二定时提前量中的一个。
一种终端设备,包括:
接收单元,用于从第一基站接收第一时间调整参数和第二时间调整参数,所述第一时间调整参数和所述第二时间调整参数用于指示所述终端设备向所述第一基站发送上行信号的第一定时提前量和第二定时提前量;所述接收单元还用于从所述第一基站接收第一指示信息,所述第一指示信息用于指示所述第一定时提前量和所述第二定时提前量中的一个;
处理单元,用于根据所述第一指示信息确定所述第一定时提前量和所述第二定时提前量中的一个;以及
发送单元,用于使用所述确定的定时提前量进行上行信号的传输。
第一方面,提供了一种信息发送方法,包括:
第一基站确定第一时间调整参数和第二时间调整参数;
所述第一基站将所述第一时间调整参数和所述第二时间调整参数发送给终端设备,其中,所述第一时间调整参数和所述第二时间调整参数分别用于所述终端设备确定向所述第一基站发送上行信号的定时提前量;以及
所述第一基站向所述终端设备发送第一指示信息,所述第一指示信息指示所述第一
时间调整参数和所述第二时间调整参数中的一个。
通过上述方法,所述第一基站可以根据多种定时需要对其所服务的终端设备的上行信号进行定时,实现了灵活、高效的上行子帧调度。
可选的,所述第一基站确定第一时间调整参数,包括:
所述第一基站根据干扰信号的到达时间确定所述第一时间调整参数,其中,所述干扰信号为干扰基站发送的下行信号,所述干扰基站与所述第一基站采用相同频段。
通过干扰信号的到达时间确定所述第一时间调整参数,可以实现第一基站基于干扰信号的存在,对终端设备的上行信号进行定时提前,以满足对干扰信号的处理需求。
进一步可选的,所述第一时间调整参数用于所述终端设备调整第一时间段的起始时间,使得第一时间段上发送的上行信号在所述第一基站的到达时间与所述干扰信号在所述第一基站的到达时间在时域符号上对齐;
其中,所述第一时间段为所述终端设备向所述第一基站发送所述上行信号的持续时间。
该第一时间调整参数的设置可以实现干扰信号和上行信号在第一基站的到达时间在时域符号上对齐,便于第一基站将干扰信号删除,分离有用信号,提高了传输效率。
可选的,所述第一基站确定所述第一时间段的长度;以及
所述第一基站向所述终端设备发送第二指示信息,所述第二指示信息用于指示子帧格式,所述子帧格式包括时域符号数,符号起始位置以及符号结束位置中的至少一种;
所述子帧格式使得所述第一时间段与所述第一时间段所在的第一子帧的下一子帧不重叠或者使得所述第一时间段与所述第一时间段所在的第一子帧的下一子帧除循环前缀部分之外的部分不重叠。
进一步可选的,所述第二指示信息所指示的子帧格式为所述第一时间段的子帧格式和/或所述第一时间段的下一子帧的子帧格式。
可选的,所述第一基站确定第二时间调整参数,包括:
所述第一基站根据上行信号的接收时间确定所述第二时间调整参数;
所述第二时间调整参数用于将第一时间段的起始时间调整为所述第一时间段对应的在所述第一基站的到达时间与所述第一基站的上行信号接收时间在时域符号上对齐;
其中,所述第一时间段为所述终端设备向所述第一基站发送上行信号的持续时间。
可选的,所述第一基站将所述第一时间调整参数和所述第二时间调整参数发送给终端设备,包括:
所述第一基站采用半静态的方式将所述第一时间调整参数和所述第二时间调整参数发送给所述终端设备。
第二方面,提供了一种信息接收方法,包括:
终端设备从第一基站接收第一时间调整参数和第二时间调整参数,所述第一时间调整参数和所述第二时间调整参数分别用于所述终端设备确定向所述第一基站发送上行
信号的定时;
所述终端设备从所述第一基站接收第一指示信息,所述第一指示信息指示所述第一时间调整参数和所述第二时间调整参数中的一个;
所述终端设备根据所述第一指示信息,确定上行信号的发送起始时间,向所述第一基站发送所述上行信号。
可选的,所述终端设备根据所述第一指示信息,确定上行信号的发送起始时间,向所述第一基站发送所述上行信号,包括:
所述第一指示信息指示所述第一时间调整参数;
所述终端设备根据所述第一时间调整参数确定所述上行信号的发送起始时间,使得所述上行信号在所述第一基站的到达时间与干扰信号的在所述第一基站的到达时间在时域符号上对齐,所述干扰信号为干扰基站发送的下行信号,所述干扰基站与所述第一基站采用相同频段。
可选的,所述终端设备从所述第一基站接收第二指示信息,所述第二指示信息用于指示子帧格式,所述子帧格式包括时域符号数,符号起始位置以及符号结束位置中的至少一种,所述子帧格式使得所述上行信号与所述上行信号所在的第一子帧的下一子帧不重叠或者使得所述上行信号与所述上行信号所在的第一子帧的下一子帧除循环前缀部分之外的部分不重叠。
进一步可选的,所述第二指示信息所指示的子帧格式为所述上行信号所在的子帧格式和/或所述上行信号所在子帧的下一子帧的子帧格式;
则所述终端设备向所述第一基站发送所述上行信号,还包括:
所述终端设备根据所述子帧格式,向所述第一基站发送所述上行信号所在子帧,或者所述上行信号所在子帧的下一子帧。
可选的,所述终端设备根据所述第一指示信息,确定上行信号的发送起始时间,向所述第一基站发送所述上行信号,包括:
所述第一指示信息指示所述第二时间调整参数;
所述终端设备根据所述第二时间调整参数确定所述上行信号的发送起始时间,使得所述上行信号在所述第一基站的到达时间与所述第一基站的上行信号接收时间在时域符号上对齐。
第三方面,提供了一种第一基站,包括:
处理单元,用于确定第一时间调整参数和第二时间调整参数;
发送单元,用于将所述第一时间调整参数和所述第二时间调整参数发送给终端设备,以及,向所述终端设备发送第一指示信息,所述第一指示信息指示所述第一时间调整参数和所述第二时间调整参数中的一个;
其中,所述第一时间调整参数和所述第二时间调整参数分别用于所述终端设备确定向所述第一基站发送上行信号的定时。
可选的,所述处理单元用于根据干扰信号的到达时间确定所述第一时间调整参数,
其中,所述干扰信号为干扰基站发送的下行信号,所述干扰基站与所述第一基站采用相同频段。
进一步可选的,所述第一时间调整参数用于将第一时间段的起始时间调整为第一时间段对应的在所述第一基站的到达时间与所述干扰信号的在所述第一基站的到达时间在时域符号上对齐,所述第一时间段为所述终端设备向所述第一基站发送上行信号的持续时间。
可选的,所述处理单元还用于确定所述第一时间段的长度;以及
所述发送单元向所述终端设备发送第二指示信息,所述第二指示信息用于指示子帧格式,所述子帧格式包括时域符号数,符号起始位置以及符号结束位置中的至少一种,所述子帧格式使得所述第一时间段与所述第一时间段所在的第一子帧的下一子帧不重叠或者使得所述第一时间段与所述第一时间段所在的第一子帧的下一子帧除循环前缀部分之外的部分不重叠。
进一步可选的,所述第二指示信息所指示的子帧格式为所述第一时间段的子帧格式和/或所述第一时间段的下一子帧的子帧格式。
可选的,所述处理单元用于根据上行信号的接收时间确定所述第二时间调整参数;
其中,所述第二时间调整参数用于将第一时间段的起始时间调整为所述第一时间段对应的在所述第一基站的到达时间与所述第一基站的上行信号接收时间在时域符号上对齐;所述第一时间段为所述终端设备向所述第一基站发送上行信号的持续时间。
可选的,所述发送单元采用半静态的方式将所述第一时间调整参数和所述第二时间调整参数发送给所述终端设备。
第四方面,提供了一种终端设备,所述终端设备包括:
接收单元,用于从第一基站接收第一时间调整参数和第二时间调整参数;以及,从所述第一基站接收第一指示信息,所述第一指示信息指示所述第一时间调整参数和所述第二时间调整参数中的一个;
处理单元,用于根据所述第一指示信息,确定上行信号的发送起始时间;
发送单元,用于根据所述上行信号的发送起始时间,向所述第一基站发送所述上行信号;
所述第一时间调整参数和所述第二时间调整参数分别用于所述终端设备确定向所述第一基站发送上行信号的定时。
可选的,所述第一指示信息指示所述第一时间调整参数;
所述处理单元用于按照如下方式根据所述第一指示信息确定上行信号的发送起始时间:
根据所述第一时间调整参数确定所述上行信号的发送起始时间,使得所述上行信号在所述第一基站的到达时间与干扰信号的在所述第一基站的到达时间在时域符号上对齐,所述干扰信号为干扰基站发送的下行信号,所述干扰基站与所述第一基站采用相同频段。
可选的,所述接收单元还用于从所述第一基站接收第二指示信息,所述第二指示信息用于指示子帧格式,所述子帧格式包括时域符号数,符号起始位置以及符号结束位置中的至少一种,所述子帧格式使得所述上行信号与所述上行信号所在的第一子帧的下一子帧不重叠或者使得所述上行信号与所述上行信号所在的第一子帧的下一子帧除循环前缀部分之外的部分不重叠。
进一步可选的,所述第二指示信息所指示的子帧格式为所述上行信号所在的子帧格式和/或所述上行信号所在子帧的下一子帧的子帧格式;
所述发送单元用于按照如下方式向所述第一基站发送上行信号:
根据所述子帧格式,向第一基站发送所述上行信号,或者所述上行信号所在子帧的下一子帧。
可选的,所述第一指示信息指示所述第二时间调整参数;
所述处理单元用于按照如下方式根据所述第一指示信息确定上行信号的发送起始时间:
根据所述第二时间调整参数确定所述上行信号的发送起始时间,使得所述上行信号在所述第一基站的到达时间与所述第一基站的上行信号接收时间在时域符号上对齐。
针对上述各个方面,本发明实施例中还可以包括如下可选实施例。
可选的,所述第一指示信息包含一段时间内是否执行干扰删除操作的通知;所述通知用于指示所述第一时间调整参数和第二时间调整参数中一个。
可选的,所述第一时间段为第一上行子帧或者为第一子帧内的上行符号。
可选的,所述第一时间调整参数为一个或多个第一时间调整参数。
可选的,所述第一时间调整参数为专用于所述终端设备的,或者所述第一时间调整参数为所述第一基站下的小区内的终端设备共享的。
可选的,本发明以上基站和终端设备的实施例中,相应的功能单元可以是由相应的硬件实现,也可以由相应的硬件执行相应的软件完成,例如,前述的发送单元,可以是具有执行前述发送单元功能的硬件,例如发射器,也可以是能够执行相应计算机程序从而完成前述功能的一般处理器或者其他硬件设备;再如前述的处理单元,可以是具有执行处理单元的功能的硬件,例如处理器,也可以是能够执行相应计算机程序从而完成前述功能的其他硬件设备;又如,前述的接收单元,可以是具有执行前述接收单元功能的硬件,例如接收器,也可以是能够执行相应计算机程序从而完成前述功能的一般处理器或者其他硬件设备。
本发明实施例提供了一种信息发送、接收方法,以及基站和终端设备,作为服务基站的第一基站通过为终端设备配置多个时间调整参数,以控制终端设备的上行信号的发送定时,实现了灵活、高效的上行子帧调度。
图1为本发明实施例的无线通信***示意图;
图2为现有技术时序关系示意图;
图3为本发明实施例信息发送和接收方法的流程示意图;
图4为本发明实施例中子帧结构调整前的时序关系示意图;
图5为本发明实施例中采用短帧结构的时序关系一的示意图;
图6为本发明实施例中采用短帧结构的时序关系二的示意图;
图7为本发明实施例在自包含子帧情况下的时序关系示意图;
图8为本发明实施例中第一基站的一种可能的结构示意图;
图9为本发明实施例中终端设备的一种可能的结构示意图。
图1所示为本发明实施例的一个应用场景示意图。本发明实施例的无线通信***,应用于工作在灵活双工模式的通信***中,或者工作在动态TDD的通信***中。本发明实施例的无线通信******包括:第一基站、一个或多个第二基站以及终端设备,其中,所述终端设备处于所述第一基站的覆盖范围内,所述第一基站为所述终端设备的服务基站,即终端设备接入的基站,并通过服务小区为所述终端设备提供服务,第二基站为所述第一基站的相邻基站。在同一个TTI内,当服务小区进行上行传输,而该服务小区邻近的一个或多个小区进行下行传输时,由于基站的发射功率远大于终端设备的发射功率,这将导致服务小区的基站在接收该服务小区的终端设备发送上行信息的同时,也接收到邻近小区的基站发送的下行信号,从而该下行信号对终端设备发送的上行信号造成严重的干扰。第二基站又称为干扰基站。
图2为现有技术时序关系示意图。图2中,竖直实线所示位置为服务基站和干扰基站用于发送下行信号的下行子帧的起始位置(或结束位置),竖直虚线所示位置为服务基站用于接收服务小区内的终端设备发送的上行信号的上行子帧的起始位置(或结束位置),可以看到,上行子帧的接收位置相对于下行子帧的发送位置的定时提前量为NTA offset。该提前量NTA offset在现有技术中为静态配置的参数,用于基站(包括服务基站和干扰基站)确定用于接收上行子帧承载的上行信号的时间位置。现有技术中,终端设备根据NTA offset以及专用于该终端设备的参数NTA确定发送上行子帧的起始位置,其中,参数NTA为服务基站采用半静态信令通知给所述终端设备的,用于所述终端调整上行子帧的位置,即在NTA
offset为0的情况下,使得所述上行子帧的到达时间与下行子帧发送时间对齐。图2中标注为终端设备上行发送的圆弧矩形框表示所述终端设备用于发送上行信号的上行子帧的时域位置,标注为终端设备上行到达的圆弧矩形框表示终端设备发送的上行信号到达服务基站的时域位置,标注为干扰基站下行发送的圆弧矩形框表示相邻基站(即第二基站)用于发送下行信号的下行子帧的时域位置,标注为干扰基站下行到达的圆弧矩形框表示相邻基站发送的下行信号到达服务基站的时域位置。
由图2可知,现有技术中配置了NTA offset,且服务基站和相邻的干扰基站的下行子帧同
频传输,导致存在时序存在偏差的多种上下行信号,服务基站对于其所服务的终端设备的上行子帧可能存在多种定时需求。
本发明实施例提供的信息发送和接收方法,除配置现有技术中用于上行定时的时间调整参数之外,基站还可以配置至少一个时间调整参数,以供终端设备根据基站的不同定时需求进行上行信号发送时间调整。
本发明实施例涉及的终端设备,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音和/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)、或用户设备(User Equipment)。
本发明实施例所涉及的基站,包括但不限于宏基站、微型基站、微微基站,归属于同一个宏基站的微型射频拉远单元(pico Remote Radio Unit,简称pRRU)与射频拉远单元(Remote Radio Head,简称RRH)等、归属于不同宏基站的pRRU与RRH等中的一个或多个。另外,基站可以是全球移动通信(Global System for Mobile communications,简称GSM)***或码分多址(Code Division Multiple Access,简称CDMA)***中的基站,也可以是宽带码分多址(Wideband Code Division Multiple Access Wireless,简称WCDMA)***中的基站(NodeB),还可以是LTE中的演进型基站(evolutional Node B,简称eNB或e-NodeB),本申请并不限定。
下面将结合附图对本发明实施例中的技术方案进行描述。需要说明的是,在不冲突的情况下,本发明实施例之间以及实施例中的特征可以相互结合。
本发明实施例提供一种通信方法,具体包括:
步骤101,第一基站确定第一时间调整参数和第二时间调整参数;
步骤102:所述第一基站将所述第一时间调整参数和所述第二时间调整参数发送给终端设备,其中,所述第一时间调整参数和所述第二时间调整参数用于指示所述终端设备向所述第一基站发送上行信号的第一定时提前量和第二定时提前量。
步骤103:所述第一基站向所述终端设备发送第一指示信息,所述第一指示信息用于指示所述终端设备采用所述第一定时提前量和所述第二定时提前量中的一个。
在上述方法中,作为一个可选的实现方式,所述第一基站根据所述终端设备发送的随机接入前导信号确定所述第二时间调整参数。可选的,所述第一基站还可以根据干扰
信号的到达时间确定所述第一时间调整参数,其中,所述干扰信号为干扰基站发送的下行信号,所述干扰基站与所述第一基站采用相同频段。优选的,所述第一定时提前量被配置为使得所述上行信号的符号与所述干扰信号的符号对齐。
作为另一个可选的实现方式,所述第一指示信息用于指示所述终端设备针对第一传输时间单元采用所述第一定时提前量。
可选的,所述第一时间调整参数用于指示偏移量,所述偏移量所述第一定时提前量相对于所述第二定时提前量的偏移量。
另外,作为一个可选的实现方式,所述第一基站向所述终端设备发送第二指示信息,所述第二指示信息用于指示所述第一传输时间单元内的有效符号数量或第二传输时间单元的有效符号数量;所述第二传输时间单元为所述第一传输时间单元的上一个传输时间单元或下一个传输时间单元。
可选的,所述第一传输时间单元内的有效符号数量大于所述第二传输时间单元的有效符号数量,或者所述第一传输时间单元内的有效符号数量小于所述第二传输时间单元的有效符号数量。
可选的,所述第二传输时间单元为采用所述第二定时提前量进行所述上行信号传输的传输时间单元,或者所述第二传输时间单元为进行下行信号传输的传输时间单元;其中,当所述第一定时提前量大于所述第二定时提前量时,所述第二传输时间单元为所述第一传输时间单元的上一个传输时间单元;和/或当所述第一定时提前量小于所述第二定时提前量时,所述第二传输时间单元为所述第二传输时间单元的下一个传输时间单元。
可选的,第一传输时间段为针对所述第一传输时间单元采用所述第一定时提前量进行所述上行信号传输的时间段,第二传输时间段为针对所述第二传输时间单元采用所述第二定时提前量进行所述上行信号传输的时间段,或所述第二传输时间段为进行下行信号传输的时间段;所述第一传输时间段与所述第二传输时间段不重叠,或者除循环前缀之外的部分不重叠。
可选的,所述第一指示信息包含一段时间内是否执行干扰删除操作的通知。
可选的,所述第一时间调整参数为专用于所述终端设备的,或者所述第一时间调整参数为所述第一基站下的小区内的终端设备共享的。
可选的,所述第一基站将所述第一时间调整参数和所述第二时间调整参数发送给终端设备,包括:
所述第一基站采用半静态的方式将所述第一时间调整参数和所述第二时间调整参数发送给所述终端设备。
本发明实施例还提供一种通信方法,具体包括:
终端设备从第一基站接收第一时间调整参数和第二时间调整参数,所述第一时间调整参数和所述第二时间调整参数用于指示所述终端设备向所述第一基站发送上行信号的第一定时提前量和第二定时提前量;
所述终端设备从所述第一基站接收第一指示信息,所述第一指示信息用于指示所述第一定时提前量和所述第二定时提前量中的一个;
所述终端设备根据所述第一指示信息确定所述第一定时提前量和所述第二定时提前量中的一个;
所述终端设备使用所述确定的定时提前量进行上行信号的传输。
在一个可选的实现方式中,在所述终端设备从第一基站接收第一时间调整参数和第二时间调整参数之前,所述方法还包括:所述终端设备向所述第一基站发送随机接入前导信号,所述随机接入前导信号用于确定所述第二时间调整参数。
可选的,所述第一定时提前量被配置为使得所述上行信号的符号与所述干扰信号的符号对齐。
可选的,所述第一指示信息用于指示所述终端设备针对第一传输时间单元采用所述第一定时提前量。
上述实现方式中,可选的,所述终端设备从所述第一基站接收第二指示信息,所述第二指示信息用于指示所述第一传输时间单元内的有效符号数量或第二传输时间单元的有效符号数量;所述第二传输时间单元为所述第一传输时间单元的上一个传输时间单元或下一个传输时间单元。
可选的,所述第一传输时间单元内的有效符号数量大于所述第二传输时间单元的有效符号数量,或者所述第一传输时间单元内的有效符号数量小于所述第二传输时间单元的有效符号数量。
可选的,所述第二传输时间单元为采用所述第二定时提前量进行所述上行信号传输的传输时间单元,或者所述第二传输时间单元为进行下行信号传输的传输时间单元;其中,当所述第一定时提前量大于所述第二定时提前量时,所述第二传输时间单元为所述第一传输时间单元的上一个传输时间单元;和/或当所述第一定时提前量小于所述第二定时提前量时,所述第二传输时间单元为所述第二传输时间单元的下一个传输时间单元。
可选的,第一传输时间段为针对所述第一传输时间单元采用所述第一定时提前量进行所述上行信号传输的时间段,第二传输时间段为针对所述第二传输时间单元采用所述第二定时提前量进行所述上行信号传输的时间段,或所述第二传输时间段为进行下行信号传输的时间段;所述第一传输时间段与所述第二传输时间段不重叠,或者除循环前缀之外的部分不重叠。
可选的,所述第一时间调整参数用于指示偏移量,所述偏移量所述第一定时提前量相对于所述第二定时提前量的偏移量。
可选的,所述第一指示信息包含一段时间内是否执行干扰删除操作的通知。
可选的,述第一时间调整参数为专用于所述终端设备的,或者所述第一时间调整参数为所述第一基站下的小区内的终端设备共享的。
可选的,所述终端设备从第一基站接收第一时间调整参数和第二时间调整参数,包括:所述终端设备通过半静态的方式从第一基站接收第一时间调整参数和第二时间调整
参数。
为了进一步详细说明上述实施例的通信方法,下面结合图3详细举例说明。图3所示为本发明实施例的一个实现方式提供的通信方法的流程示意图,本方法包括如下步骤:
步骤310,第一基站确定第一时间调整参数和第二时间调整参数;
具体的,第一基站根据其与一终端设备之间的信号传输时延和/或定时需求,确定第一和第二时间调整参数。
可选的,所述第一和第二时间调整参数为不同的上行定时提前量。
可选的,所述第一时间调整参数为定时参数,所述定时参数对应于一定时需求,用于所述终端设备确定一上行定时提前量。
例如,所述定时参数可以为上行收发时延、下行收发时延、或者其他有关定时的参数等。
可选的,所述第一时间调整参数可以为一个或多个第一时间调整参数。
具体的,第一基站为每个所述第一时间调整参数设置索引信息,所述索引信息唯一对应于一个第一时间调整参数。
另外,所述第一基站还可以为所述第二时间调整参数设置索引信息。
步骤320,所述第一基站将所述第一时间调整参数和所述第二时间调整参数发送给终端设备,所述第一时间调整参数和所述第二时间调整参数分别用于所述终端设备确定向所述第一基站发送上行信号的定时提前量;
可选的,所述终端设备根据第一时间调整参数确定第一定时提前量,根据第二时间调整参数确定第二定时提前量。
进一步可选的,所述第一和第二定时提前量可以相同或不同。
可选的,所述第一基站可以通过高层信令将所述第一时间调整参数和第二时间调整参数发送给所述终端设备。
进一步地,所述第一基站可以采用半静态的方式将所述第一和第二时间调整参数发送给所述终端设备,例如,采用无线资源控制(Radio Resource Control,RRC)信令或者媒体接入控制(media access control,MAC)层信令的方式。
步骤330,所述第一基站向所述终端设备发送第一指示信息,所述第一指示信息指示所述第一时间调整参数和所述第二时间调整参数中的一个;
基于所述第一指示信息,所述终端设备根据所述第一时间调整参数和第二时间调整参数中的至少一个确定第一上行子帧的所述发送时间;
具体的,所述第一指示信息可以包含所述索引信息,所述终端设备根据所述索引信息确定所述第一或第二时间调整参数;
可选的,所述终端设备根据所述第一时间调整参数或第二时间调整参数确定第一上行子帧的所述发送时间。
例如,所述终端设备将所述第一或第二时间调整参数作为上行定时提前量。
可选的,所述终端设备根据所述第一时间调整参数和第二时间调整参数确定第一上行子帧的所述发送时间。
例如,所述终端设备根据所述第一和第二时间调整参数得到上行定时提前量。
需要说明的是,在步骤330中,所述终端设备根据预设的配置信息,基于所述第一指示信息,确定第一上行子帧的发送起始时间。所述预设的配置信息用于指示所述指示信息、时间调整参数和定时提前量之间的对应关系,使得所述终端设备可以根据所述配置信息,在接收到所述第一指示信息之后,确定上行信号的发送起始时间。
其中,所述预设的配置信息可以,由所述基站在终端设备接入时通知给所述终端设备,例如以信令的方式通知,或者预先配置给所述终端设备。
步骤340,所述终端设备在所述发送时间向所述第一基站发送所述上行信号;
步骤350,所述第一基站确定所述上行信号的接收时间,并在所述接收时间接收所述终端设备发送的上行信号。
本发明实施例提供了一种信息发送和接收方法,通过该方法,第一基站可以预先配置多个时间调整参数,根据不同的定时需求,通知终端设备进行相应的上行信号定时,为服务小区基站提供了灵活、高效的上行子帧调度方式,以满足上行定时的多种需要。
进一步,如图2所示,服务基站上行接收的时间窗口相比于干扰基站下行发送的时间窗口,提前量为NTA offset;为满足上行信号到达服务基站的时间与服务基站上行接收窗口的时间完全对齐,终端设备上行发送的时间点需要提前,该提前量表示为NTA+NTA offset。由于在服务基站与干扰基站采用相同频段的情况下,干扰基站下行传输的时间窗口与服务基站下行传输的时间窗口是完全对齐的。当终端设备通过第一频段向服务基站发送上行信号并且干扰基站采用相同的第一频段发送下行信号时,服务基站在接收到所述终端设备发送的上行信号的同时,也会接收到干扰基站发送的下行信号。这种情况下,服务基站需要将接收信号中来自相邻基站的部分删除,恢复出终端设备发送的上行信号。本发明该可选的实施例中将服务基站从接收信号中来自相邻基站的部分删除的操作称为干扰删除操作,将服务基站接收到的信号中来自相邻基站的部分称为干扰信号,将服务基站接收到的信号中来自终端设备的部分称为有用信号。
一可选的实施例中,步骤310中,所述第一基站根据干扰信号的到达时间确定第一时间调整参数,其中,所述干扰信号为与所述第一基站采用相同频段的第二基站(干扰基站)发送的下行信号。
通过该可选的实施例,第一基站可以根据接收到的干扰信号对终端设备的上行信号进行定时调整。
其中,第一基站通过测量干扰信号的到达时间确定,干扰基站发送下行信号的时间到达第一基站与所述第二基站发送下行信号的时间之差为NDelay。
可选的,第一基站根据现有技术中的定时提前量参数NTA和NDelay确定第一时间调整参数为NTA-IC=NTA-NDelay。
可选的,第一基站也可以确定第一时间调整参数为
NTA-IC=NDelay。
所述第一时间调整参数用于确定第一上行子帧的起始时间,所述第一时间调整参数将所述第一上行子帧的所述起始时间调整为所述第一上行子帧在所述第一基站的到达时间与所述干扰信号在所述第一基站的到达时间在时域符号上对齐。这样,第一基站可以将接收信号中来自干扰基站的干扰信号部分删除,恢复出终端设备发送的上行信号。
可选的,所述第一时间调整参数可以是终端设备专用参数,即处于所述第一基站下的第一小区内的每个终端设备,分别配置独立的参数,至少两个终端设备接收到的第一时间调整参数可以是相同的,但是所述服务基站是将所述第一时间调整参数分别配置给所述至少两个终端设备的。
可选的,所述第一参数也可以小区专用的参数。小区专用的参数是指,处于所述第一基站下的第一小区内的终端设备共享同一个第一时间调整参数。
可选的,所述第一基站确定现有技术中的时间提前参数NTA作为第二时间调整参数。
其中,当所述参数NTA发生改变时,例如,所述第一基站判断NTA发生改变,则所述第一基站发送新的NTA到所述终端设备,所述新的NTA的索引信息与原NTA的索引信息相同,所述终端设备根据所述索引信息更新对应的NTA值。
可选的,步骤330中,所述第一指示信息指示第一或第二时间调整参数中的一个:
例如,若所述第一指示信息指示第一时间调整参数,则所述终端设备根据NTA-IC确定第一上行子帧的发送时间;
当第一基站确定的第一时间调整参数为NTA-IC=NTA-NDelay时,所述终端设备根据参数NTA-IC和现有技术中的参数NTA offset确定第一上行子帧的所述发送定时提前量为(NTA-IC+NTA
offset)。
当第一基站确定的第一时间调整参数为NTA-IC=NDelay时,所述终端设备根据参数NTA-IC以及现有技术中的参数NTA offset和NTA确定第一上行子帧的所述发送定时提前量为(NTA-NTA-IC+NTA offset)。
又如,若所述第一指示信息指示第二时间调整参数,则终端设备根据第二时间调整参数,例如,现有技术中的参数NTA,确定上行子帧的发送时间。
进一步可选的,步骤310之前,本发明实施例还可以包括:
所述第一基站确定至少一个干扰基站,每个干扰基站对应一个第一时间调整参数;
具体的,所述第一基站根据其与每个干扰基站的距离确定与所述每个干扰基站对应的第一时间调整参数,所述第一时间调整参数用于将所述第一上行子帧的所述起始时间调整为所述第一上行子帧在所述第一基站的到达时间与所述第一时间调整参数对应的干扰基站的干扰信号在所述第一基站的到达时间在时域符号上对齐。
进一步,步骤320中,所述第一基站将所述至少一个第一时间调整参数和所述第二时间调整参数发送给终端设备。
进一步,步骤330之前,本发明实施例还包括:
所述第一基站接收干扰信号,生成第一指示信息,所述第一指示信息指示所述干扰信号所来自的干扰基站对应的第一时间调整参数。
本发明该实施例中,服务基站配置新定义的时序参数,为终端设备配置新的发送时序,从而终端设备发送的上行信号到达服务基站与干扰基站发送的下行信号到达服务基站的时间在时域符号上对齐。这样,服务基站即能够将接收信号中来自干扰基站的下行信号的部分删除,从而在终端上行发射功率较低的情况下,也可以恢复出终端设备发送的上行信号,降低了终端设备的功率开销,提升网络的能效。
进一步可选的,步骤330中的第一指示信息还可以指示在第一子帧内或在一段时间内需要进行干扰删除操作。
一种可能的实现方式,所述第一基站动态的向所述终端设备发送指示信息,用于指示第一子帧内是否进行干扰删除操作。其中,第一子帧可以为特定的子帧。例如,该指示信息可以是用于调度所述第一子帧的物理下行控制信道(physical downlink control channel,PDCCH)中的字段。当然也可以是用于调度其他子帧的PDCCH中的字段。当所述指示信息指示第一子帧内进行干扰删除操作,则所述终端设备在步骤330中按照所述第一时间调整参数确定所述第一子帧的起始时间。当所述指示信息指示第一子帧内不进行干扰删除操作,所述终端设备则按照第二时间调整参数,例如现有技术中的参数NTA,确定所述第一子帧的起始时间。
其中,所述指示信息可以为1比特,例如,如表1所示设置:
表1
信令取值 | 意义 |
0 | 第一子帧不进行干扰删除 |
1 | 第一子帧进行干扰删除 |
另一种可能的实现方式中,所述第一时间调整参数为一个或多个,所述第一基站动态的向所述终端设备发送指示信息,用于指示第一子帧内是否进行干扰删除操作,当所述指示信息指示第一子帧内进行干扰删除操作时,则所述指示信息同时指示确定上行发送定时的一个所述第一时间调整参数。
具体的,所述指示信息包含索引信息,所述索引信息用于指示一个所述第一时间调整参数NTA-IC。所述索引信息是第一基站根据相邻的干扰基站预先设置的,所述索引信息的设置规则可以由第一基站确定,对对应于不同干扰基站的第一时间调整参数进行区分,具体设置规则此处不做限定。
其中,所述指示信息可以为2比特,例如,当第一基站存在第一干扰基站、第二干扰基站以及第三干扰基站时,如表2所示的设置。
表2
需要说明的是,第一基站的相邻干扰基站的数目可以有多个。干扰删除操作场景中,第一基站可以配置的干扰基站最大数目为N(N为正整数),则所述第一基站可以选择相邻干扰基站中的M个(M<=N,M为正整数)作为干扰删除场景中的干扰基站,选择方式可以由基站根据实际通信需要确定,这里不做具体限定。
需要说明的是,根据信令设计的需要,可以选择性的设置第一指示信息是否包括在第一子帧内或在一段时间内需要进行干扰删除操作,所述第一指示信息可以仅仅指示一个所述第一时间调整参数或第二时间调整参数,则所述终端设备根据所述第一或第二时间调整参数进行上行发送定时。
再一种可能的实现方式,所述第一基站半静态的向所述终端设备发送所述第一指示信息,用于指示一段时间内进行干扰删除操作。终端设备在接收到该指示信息后,所述指示信息指示的时间内,根据所述指示信息所指示的所述第一时间调整参数来确定所述上行子帧的发送时间。
进一步地,如果仅调整用户终端上行发送的时间而不对子帧格式进行改进,则进行干扰删除的上行子帧将会与后一下行子帧出现交叠,影响后一子帧的正常发送。如图4所示,当第一上行子帧(即标注为终端设备上行到达的子帧)仍然为1ms的上行子帧时,该标注为终端设备上行到达的圆弧矩形框的右边界将跨越到右侧竖直虚线的右侧,从而与标注为服务基站下行发送的圆弧矩形框产生部分重叠。在这种情况下,会影响服务基站下行发送。为了克服这一问题,本发明实施例设计了的短子帧格式,如图5、图6以及上文图7所示,可以避免进行干扰删除的上行子帧与后一下行子帧出现交叠,其中图5对第一上行子帧采用了短帧,图6对第一上行子帧的下一子帧采用了短帧,如标注为服务基站上行接收的圆弧矩形框所示,图7对第一上行子帧和该第一上行子帧下一子帧都采用了短帧。
因此,可选的,步骤340之前,本发明实施例还可以包括:
步骤330a1,所述第一基站确定终端设备进行上行传输的子帧格式,其中,所述子帧格式为小于或等于1ms的子帧格式,且所述子帧格式使得所述第一上行子帧与所述第一上行子帧的下一子帧不重叠或者使得所述第一上行子帧与所述第一上行子帧的下一子帧除循环前缀(cyclic prefix,CP)部分之外的部分不重叠;以及
步骤330a2,所述第一基站将所述子帧格式通知给所述终端设备;
需要说明的是,所述子帧格为等于1ms的子帧格式时,所述基站可以不将所述子帧格式通知所述终端设备。
本发明实施例通过将子帧格式通知给所述终端设备,使得进行干扰删除子帧(即第一上行子帧)的符号不影响所述第一上行子帧的下一子帧的正常发送与接收。
具体的,所述第一基站和所述终端设备中预先定义上行传输所采用新的子帧格式,所述新的子帧格式可以是一种或多种,所述新的子帧格式包括用于干扰删除子帧的格式,也可以包括用于非干扰删除子帧的格式。所述子帧格式包括子帧所包含的符号数,
子帧内起始符号的序号以及子帧内结束符号的序号中的至少一种。例如,现有LTE或LTE-A***中一个子帧内可以包含14个符号,本发明实施例中新定义的子帧格式可以是10个符号,即仅在现有14个符号中的10个中进行传输信号,如在起始符号的序号为3,结束符号的序号为12的10个符号上传输信号,其余4个符号(即符号0-2以及符号13)上不用于传输信号。
所述子帧格式可以是针对所述第一上行子帧的子帧格式,也可以是针对所述第一上行子帧的下一子帧的子帧格式,还可以是针对所述第一上行子帧以及所述第一上行子帧的下一子帧的子帧格式。
这样,步骤330a2的一种可能的实现方式中,第一基站动态的通知终端设备第一上行子帧和/或所述第一上行子帧的下一子帧所采用的子帧格式,所述子帧格式可以通过单独的信令进行通知。所述第一基站还可以将所述子帧格式与上述步骤330中的指示信息一并通知。也即,步骤330中的指示信息同时指示所述第一基站确定的子帧格式。
例如表3所示,基站可以采用2比特通知所述第一上行子帧是否进行干扰删除和该第一上行子帧和/或所述第一上行子帧的下一子帧的子帧格式,例如,当该2两比特为00时,表示该第一子帧不进行干扰删除,且子帧格式为格式0。
表3
信令取值 | 干扰删除 | 子帧格式 |
00 | 第一子帧不进行干扰删除 | 格式0 |
01 | 第一子帧进行干扰删除 | 格式0 |
10 | 第一子帧进行干扰删除 | 格式1 |
11 | 第一子帧进行干扰删除 | 格式2 |
步骤330a2的另一种可能的实现方式中,第一基站半静态的配置终端设备在一段时间内的上行子帧的格式,或者配置终端设备在一段时间内进行干扰删除的上行子帧所采用的子帧格式。例如,第一基站通过高层信令如MAC层信令或者无线资源控制(radio resource control,RRC)信令指示在一段时间内的上行子帧的格式。终端设备在接收到该指示信息后,所述指示信息指示的时间内,按照根据所述第一时间调整参数来确定所述上行子帧的发送时间。
需要说明的是,以上实施例涉及的所有可能的方案中,步骤330可以和步骤320一起执行,即所述第一基站将所述第一时间调整参数和第二时间调整参数发送给终端设备的同时,还向终端设备发送所述第一指示信息。
下面通过结合具体的时序关系图说明本发明实施例中的实现方式。
如图5所示为本发明实施例时序关系一。图中所示意的时域位置可以参照上文中的描述,此处不再赘述。图5中的参数NTA-IC即本发明实施例中的所述第一时间调整参数,该参数NTA-IC由所述第一基站根据干扰基站发送的下行信号到达所述第一基站的时间以及所述终端设备发送上行信号到达所述第一基站的时间来确定。所述第一基站将该参数NTA-IC发送给所述终端设备,所述终端设备根据该参数NTA-IC确定所述终端设备发送上行信号的起始位置。与图2所示的现有技术相比,本发明实施例中终端设备发送上行信号的上行子帧的时域起始位置经过调整后,该上行信号到达第一基站的到达时间(即该上行子帧
对应的到达时间)与干扰基站的下行信号到达第一基站的时域位置在符号上是对齐的。需要说明的是,本发明实施例所示的时序关系示意图中,该上行信号到达第一基站的到达时间的起始位置与干扰基站的下行信号到达第一基站的时域起始位置恰好是对齐的,但本发明实施例并不限于此,二者起始位置对齐只是一种特例。只要所述上行信号到达第一基站的到达时间与干扰基站的下行信号到达第一基站的时域位置在符号上是对齐的即可,二者起始位置可以不是对齐的,这种情况下,第一基站只需要对上行信号中与干扰信号叠加的部分进行干扰删除即可。
同时,该时序关系一中,终端设备发送上行信号的上行子帧的长度也进行了缩短,使得该上行信号到达第一基站的时域结束位置在所述第一基站接收上行子帧时域结束位置之前,即图4中标注为终端设备上行到达的圆弧形矩形框的右边界处于右边竖直虚线的左侧。这种情况下,所述子帧格式为针对所述第一上行子帧的子帧格式。
图6所示为本发明实施例时序关系二的示意图。与图5不同的是,图6中对第一上行子帧的下一子帧采用了短帧,如标注为服务基站上行接收的圆弧矩形框所示。这种情况下,所述子帧格式为针对所述第一上行子帧的下一子帧的子帧格式。
图7所示为本发明实施例时序关系三的示意图。与图5不同的是,图7中对所述第一上行子帧以及第一上行子帧的下一子帧都采用了短帧。这种情况下,所述子帧格式为针对所述第一上行子帧的下一子帧的子帧格式。其中,所述第一上行子帧以及第一上行子帧的下一子帧可以采用相同的子帧格式,当然所述第一上行子帧以及第一上行子帧的下一子帧也可以采用不同的子帧格式。
另一方面,本发明实施例还可以应用于采用自包含子帧进行传输的场景。如图7所示,在1ms的时间间隔内,基站(包括服务基站和干扰基站)先进行下行发送,如图7中标注为基站下行发送的圆弧矩形框,之后在该时间间隔内再接收终端设备发送的上行信号,如图7中标注是终端设备上行到达的圆弧矩形框。可以看到,服务基站接收上行信号的同时也会接收到一部分干扰基站发送的下行信号,如图7中的两条竖直虚线之间的部分。因此,本发明实施例可以通过设备上述参数NTA-IC的取值,调整终端设备发送上行信号的起始位置,使得终端设备上行信号到达服务基站的时间与干扰基站发送的下行信号到达服务基站的时间在时域符号上对齐,从而使得服务小区基站可以对干扰基站下行信号进行干扰删除。
在现有技术的技术方案中,每个终端设备仅有一个确定上行信号发送时间点的参数,无法实现终端设备发送的上行信号与相邻基站发送的下行信号在服务基站处对齐。而本发明实施例通过设置第一时间调整参数,使得终端设备发送的上行信号与相邻基站发送的下行信号在服务小区基站处在时域符号上对齐,从而实现干扰删除。
图8示出了本发明第一实施例中所涉及的第一基站的一种可能的结构示意图。
所述第一基站包括处理单元801、发送单元802以及接收单元803,根据实际需要还可以包括存储单元(图中并未示出)。
所述处理单元801,用于确定第一时间调整参数和第二时间调整参数;
所述发送单元802,用于将所述第一时间调整参数和所述第二时间调整参数发送给终端设备;
所述发送单元802,还用于向所述终端设备发送第一指示信息,所述第一指示信息指示所述第一时间调整参数和所述第二时间调整参数中的一个;
所述接收单元803,用于接收从所述终端设备发送的上行信号。
其中,第一基站为所述终端设备的服务基站;所述第一时间调整参数和所述第二时间调整参数分别用于所述终端设备确定向所述第一基站发送上行信号的定时。
在一可选的实施例中,所述处理单元801还用于根据干扰信号的到达时间确定所述第一时间调整参数,其中,所述干扰信号为所述接收单元803接收的、从干扰基站发送的下行信号,所述干扰基站与所述第一基站采用相同频段;
可选的,所述第一时间调整参数用于将第一时间段的起始时间调整为第一时间段对应的在所述第一基站的到达时间与所述干扰信号的在所述第一基站的到达时间在时域符号上对齐;其中,所述第一时间段为所述终端设备向所述第一基站发送上行信号的持续时间。
可选的,所述处理单元801还用于确定所述第一时间段的长度,然后根据所述长度,所述发送单元802向所述终端设备发送第二指示信息,所述第二指示信息用于指示子帧格式,所述子帧格式包括时域符号数,符号起始位置以及符号结束位置中的至少一种,所述子帧格式使得所述第一时间段与所述第一时间段所在的第一子帧的下一子帧不重叠或者使得所述第一时间段与所述第一时间段所在的第一子帧的下一子帧除循环前缀部分之外的部分不重叠。
进一步可选的,所述第二指示信息所指示的子帧格式为所述第一时间段的子帧格式和/或所述第一时间段的下一子帧的子帧格式。
又一可选的实施例中,所述处理单元801用于确定根据上行信号的接收时间确定所述第二时间调整参数;
可选的,所述第二时间调整参数用于将第一时间段的起始时间调整为所述第一时间段对应的在所述第一基站的到达时间与所述第一基站的上行信号接收时间在时域符号上对齐;其中,所述第一时间段为所述终端设备向所述第一基站发送上行信号的持续时间。
再一可选的实施例中,所述第一指示信息包含一段时间内是否执行干扰删除操作的通知;所述通知用于指示所述终端设备根据所述第一时间调整参数和第二时间调整参数中一个确定所述第一时间段的起始时间。
再一可选的实施例中,所述第一时间调整参数为一个或多个时间调整参数。
可选的,所述处理单元801确定至少一个干扰基站,每个干扰基站对应一个第一时间调整参数;
具体的,所述处理单元801根据其与每个干扰基站的距离确定与所述每个干扰基站对应的第一时间调整参数,所述第一时间调整参数用于将所述第一上行子帧的所述起始时间调整为所述第一上行子帧对应的在所述第一基站的到达时间与所述第一时间调整
参数对应的干扰基站的干扰信号在所述第一基站的到达时间在时域符号上对齐。
具体的,所述发送单元802用于将所述至少一个第一时间调整参数和所述第二时间调整参数发送给终端设备。例如,所述发送单元802采用半静态的方式发送所述第一时间调整参数和所述第二时间调整参数。
需要说明的是,上述第一基站的各单元执行了本发明一实施例的方法的信息交互、执行过程等内容,具体可参见方法实施例中的描述。而且,该第一基站的实施例与上述方法实施例基于同一构思,其带来的技术效果与本发明方法实施例相同,具体内容可参见本发明方法实施例中的叙述,此处不再赘述。
图9示出了本发明第一实施例中所涉及的终端设备的一种可能的结构示意图。
所述终端设备包括接收单元901、处理单元902以及发送单元903,根据根据实际需要还可以包括存储单元(图中并未示出)。
所述接收单元901,用于从第一基站接收第一时间调整参数和第二时间调整参数;
所述接收单元901,还用于从所述第一基站接收第一指示信息,所述第一指示信息指示所述第一时间调整参数和所述第二时间调整参数中的一个;
所述处理单元902,根据所述第一指示信息,确定上行信号的发送起始时间;
所述发送单元903,用于向所述第一基站发送所述上行信号。
其中,所述第一基站为所述终端设备的服务基站,所述第一时间调整参数和所述第二时间调整参数分别用于所述终端设备确定向所述第一基站发送上行信号的定时。
在一可选的实施例中,处理单元902根据所述第一指示信息,确定上行信号的发送起始时间:
例如,所述第一指示信息指示所述第一时间调整参数,所述处理单元902根据所述第一时间调整参数确定所述上行信号的发送起始时间,使得所述上行信号在所述第一基站的到达时间与干扰信号的在所述第一基站的到达时间在时域符号上对齐,所述干扰信号为干扰基站发送的下行信号,所述干扰基站与所述第一基站采用相同频段;
可选的,所述接收单元901从所述第一基站接收第二指示信息,所述第二指示信息用于指示子帧格式,所述子帧格式包括时域符号数,符号起始位置以及符号结束位置中的至少一种,所述子帧格式使得所述上行信号与所述上行信号所在的第一子帧的下一子帧不重叠或者使得所述上行信号与所述上行信号所在的第一子帧的下一子帧除循环前缀部分之外的部分不重叠。
其中,所述第二指示信息所指示的子帧格式为所述上行信号所在的子帧格式和/或所述上行信号所在子帧的下一子帧的子帧格式。则所述发送单元903用于根据所述子帧格式,向所述第一基站发送所述上行信号所在的第一子帧,或者所述所述上行信号所在子帧的下一子帧。
又如,所述第一指示信息指示所述第二时间调整参数,所述处理单元902根据所述第二时间调整参数确定所述上行信号的发送起始时间,使得所述上行信号在所述第一基站的到达时间与所述第一基站的上行信号接收时间在时域符号上对齐。
又一可选的实施例中,所述第一指示信息包含一段时间内是否执行干扰删除操作的通知;所述处理器902根据所述通知,确定所述第一时间调整参数和第二时间调整参数中的一个。
再一可选的实施例中,所述第一时间调整参数为一个或多个第一时间调整参数。
具体的,所述接收单元901接收一个或多个第一时间调整参数,以及第二时间调整参数,并接收所述第一指示信息:
当所述第一指示信息指示一个所述第一时间调整参数时,所述处理单元902根据所述第一时间调整参数确定上行信号发送起始时间,所述第一时间调整参数用于将所述第一上行子帧的所述起始时间调整为所述上行信号在所述第一基站的到达时间与所述第一时间调整参数对应的干扰基站的干扰信号在所述第一基站的到达时间在时域符号上对齐。
本发明实施例还提供一种第一基站,包括:
处理单元,用于确定第一时间调整参数和第二时间调整参数;
发送单元,用于将所述第一时间调整参数和所述第二时间调整参数发送给终端设备,其中,所述第一时间调整参数和所述第二时间调整参数用于指示所述终端设备向所述第一基站发送上行信号的第一定时提前量和第二定时提前量;
所述发送单元还用于向所述终端设备发送第一指示信息,所述第一指示信息用于指示所述终端设备采用所述第一定时提前量和所述第二定时提前量中的一个。
在一个可选的实现方式中,所述处理单元用于根据干扰信号的到达时间确定所述第一时间调整参数,其中,所述干扰信号为干扰基站发送的下行信号,所述干扰基站与所述第一基站采用相同频段。
在一个可选的实现方式中,所述第一基站确定第二时间调整参数,包括:
所述第一基站根据所述终端设备发送的随机接入前导信号确定所述第二时间调整参数。
在一个可选的实现方式中,所述第一定时提前量被配置为使得所述上行信号的符号与所述干扰信号的符号对齐。
在一个可选的实现方式中,所述第一指示信息用于指示所述终端设备针对第一传输时间单元采用所述第一定时提前量。
在一个可选的实现方式中,所述发送单元还用于向所述终端设备发送第二指示信息,所述第二指示信息用于指示所述第一传输时间单元内的有效符号数量或第二传输时间单元的有效符号数量;所述第二传输时间单元为所述第一传输时间单元的上一个传输时间单元或下一个传输时间单元。
在一个可选的实现方式中,所述第一传输时间单元内的有效符号数量大于所述第二传输时间单元的有效符号数量,或者所述第一传输时间单元内的有效符号数量小于所述第二传输时间单元的有效符号数量。
在一个可选的实现方式中,所述第二传输时间单元为采用所述第二定时提前量进行
所述上行信号传输的传输时间单元,或者所述第二传输时间单元为进行下行信号传输的传输时间单元;其中,
当所述第一定时提前量大于所述第二定时提前量时,所述第二传输时间单元为所述第一传输时间单元的上一个传输时间单元;和/或
当所述第一定时提前量小于所述第二定时提前量时,所述第二传输时间单元为所述第二传输时间单元的下一个传输时间单元。
在一个可选的实现方式中,第一传输时间段为针对所述第一传输时间单元采用所述第一定时提前量进行所述上行信号传输的时间段,第二传输时间段为针对所述第二传输时间单元采用所述第二定时提前量进行所述上行信号传输的时间段,或所述第二传输时间段为进行下行信号传输的时间段;
所述第一传输时间段与所述第二传输时间段不重叠,或者除循环前缀之外的部分不重叠。
在一个可选的实现方式中,所述第一时间调整参数用于指示偏移量,所述偏移量所述第一定时提前量相对于所述第二定时提前量的偏移量。
在一个可选的实现方式中,所述第一指示信息包含一段时间内是否执行干扰删除操作的通知。
在一个可选的实现方式中,所述第一时间调整参数为专用于所述终端设备的,或者所述第一时间调整参数为所述第一基站下的小区内的终端设备共享的。
在一个可选的实现方式中,所述将所述第一时间调整参数和所述第二时间调整参数发送给终端设备,包括:
所述采用半静态的方式将所述第一时间调整参数和所述第二时间调整参数发送给所述终端设备。
本发明实施例还提供一种终端设备,包括:
接收单元,用于从第一基站接收第一时间调整参数和第二时间调整参数,所述第一时间调整参数和所述第二时间调整参数用于指示所述终端设备向所述第一基站发送上行信号的第一定时提前量和第二定时提前量;所述接收单元还用于从所述第一基站接收第一指示信息,所述第一指示信息用于指示所述第一定时提前量和所述第二定时提前量中的一个;
处理单元,用于根据所述第一指示信息确定所述第一定时提前量和所述第二定时提前量中的一个;以及
发送单元,用于使用所述确定的定时提前量进行上行信号的传输。
在一个可选的实现方式中,所述发送单元还用于向所述第一基站发送随机接入前导信号,所述随机接入前导信号用于确定所述第二时间调整参数。
在一个可选的实现方式中,所述第一定时提前量被配置为使得所述上行信号的符号与所述干扰信号的符号对齐。
在一个可选的实现方式中,所述第一指示信息用于指示所述终端设备针对第一传输
时间单元采用所述第一定时提前量。
在一个可选的实现方式中,所述接收单元还用于从所述第一基站接收第二指示信息,所述第二指示信息用于指示所述第一传输时间单元内的有效符号数量或第二传输时间单元的有效符号数量;所述第二传输时间单元为所述第一传输时间单元的上一个传输时间单元或下一个传输时间单元。
在一个可选的实现方式中,所述第一传输时间单元内的有效符号数量大于所述第二传输时间单元的有效符号数量,或者所述第一传输时间单元内的有效符号数量小于所述第二传输时间单元的有效符号数量。
在一个可选的实现方式中,所述第二传输时间单元为采用所述第二定时提前量进行所述上行信号传输的传输时间单元,或者所述第二传输时间单元为进行下行信号传输的传输时间单元;其中,
当所述第一定时提前量大于所述第二定时提前量时,所述第二传输时间单元为所述第一传输时间单元的上一个传输时间单元;和/或
当所述第一定时提前量小于所述第二定时提前量时,所述第二传输时间单元为所述第二传输时间单元的下一个传输时间单元。
在一个可选的实现方式中,第一传输时间段为针对所述第一传输时间单元采用所述第一定时提前量进行所述上行信号传输的时间段,第二传输时间段为针对所述第二传输时间单元采用所述第二定时提前量进行所述上行信号传输的时间段,或所述第二传输时间段为进行下行信号传输的时间段;
所述第一传输时间段与所述第二传输时间段不重叠,或者除循环前缀之外的部分不重叠。
在一个可选的实现方式中,所述第一时间调整参数用于指示偏移量,所述偏移量所述第一定时提前量相对于所述第二定时提前量的偏移量。
在一个可选的实现方式中,所述第一指示信息包含一段时间内是否执行干扰删除操作的通知。
在一个可选的实现方式中,所述第一时间调整参数为专用于所述终端设备的,或者所述第一时间调整参数为所述第一基站下的小区内的终端设备共享的。
在一个可选的实现方式中,所述备从第一基站接收第一时间调整参数和第二时间调整参数,包括:通过半静态的方式从第一基站接收第一时间调整参数和第二时间调整参数。
需要说明的是,上述终端设备的各单元执行了本发明实施例的方法的信息交互、执行过程等内容,具体可参见方法实施例中的描述。而且,该第一基站的实施例与上述方法实施例基于同一构思,其带来的技术效果与本发明方法实施例相同,具体内容可参见本发明方法实施例中的叙述,此处不再赘述。
需要说明的是,以上基站和用户设备的实施例中,各功能单元的划分仅是举例说明,实际应用中可以根据需要,例如相应硬件的配置要求或者软件的实现的便利考虑,而将上述功能分配由不同的功能单元完成,即将所述用户设备和基站的内部结构划分成不同
的功能单元,以完成以上描述的全部或者部分功能。而且,实际应用中,本实施例中的相应的功能单元可以是由相应的硬件实现,也可以由相应的硬件执行相应的软件完成,例如,前述的发送单元,可以是具有执行前述发送单元功能的硬件,例如发射器,也可以是能够执行相应计算机程序从而完成前述功能的一般处理器或者其他硬件设备;再如前述的处理单元,可以是具有执行处理单元的功能的硬件,例如处理器,也可以是能够执行相应计算机程序从而完成前述功能的其他硬件设备;又如,前述的接收单元,可以是具有执行前述接收单元功能的硬件,例如接收器,也可以是能够执行相应计算机程序从而完成前述功能的一般处理器或者其他硬件设备(本说明书提供的各个实施例都可应用上述描述原则)。
本领域普通技术人员可以理解上述实施例的各种方法中的全部或部分步骤是可以通过程序来指令相关的硬件来完成,该程序可以存储于一计算机可读存储介质中,存储介质可以包括:只读存储器(ROM,Read Only Memory)、随机存取存储器(RAM,Random Access Memory)、磁盘或光盘等。
应理解,说明书通篇中提到的“一个实施例”,“一实施例”,或“本发明实施例”意味着与实施例有关的特定特征、结构或特性包括在本发明的至少一个实施例中。因此,在整个说明书各处出现的“在一个实施例中”,“在一实施例中”,或“本发明实施例中”未必一定指相同的实施例。此外,这些特定的特征、结构或特性可以任意适合的方式结合在一个或多个实施例中。
在本发明的各种实施例中,应理解,上述各过程的序号的大小并不意味着执行顺序的先后,各过程的执行顺序应以其功能和内在逻辑确定,而不应对本发明实施例的实施过程构成任何限定。
在本申请所提供的实施例中,应理解,“与A相应的B”表示B与A相关联,根据A可以确定B。但还应理解,根据A确定B并不意味着仅仅根据A确定B,还可以根据A和/或其它信息确定B。
以上对本发明实施例提供的方法和用户设备和基站进行了详细介绍,本文中应用了具体个例对本发明的原理及实施方式进行了阐述,以上实施例的说明只是用于帮助理解本发明的方法及其核心思想;同时,对于本领域的一般技术人员,依据本发明的思想,在具体实施方式及应用范围上均会有改变之处,综上所述,本说明书内容不应理解为对本发明的限制。
Claims (53)
- 一种通信方法,其特征在于,所述方法包括:第一基站确定第一时间调整参数和第二时间调整参数;所述第一基站将所述第一时间调整参数和所述第二时间调整参数发送给终端设备,其中,所述第一时间调整参数和所述第二时间调整参数用于指示所述终端设备向所述第一基站发送上行信号的第一定时提前量和第二定时提前量;以及所述第一基站向所述终端设备发送第一指示信息,所述第一指示信息用于指示所述终端设备采用所述第一定时提前量和所述第二定时提前量中的一个。
- 根据权利要求1所述的方法,其特征在于,所述第一基站确定第一时间调整参数,包括:所述第一基站根据干扰信号的到达时间确定所述第一时间调整参数,其中,所述干扰信号为第二基站发送的下行信号,所述第二基站与所述第一基站采用相同频段。
- 根据权利要求1或2所述的方法,其特征在于,所述第一基站确定第二时间调整参数,包括:所述第一基站根据所述终端设备发送的随机接入前导信号确定所述第二时间调整参数。
- 根据权利要求2或3所述的方法,其特征在于:所述第一定时提前量被配置为使得所述上行信号的符号与所述干扰信号的符号对齐。
- 根据权利要求1至4中任意一项所述的方法,其特征在于:所述第一指示信息用于指示所述终端设备针对第一传输时间单元采用所述第一定时提前量。
- 如权利要求5所述的方法,其特征在于,还包括:所述第一基站向所述终端设备发送第二指示信息,所述第二指示信息用于指示所述第一传输时间单元内的有效符号数量或第二传输时间单元的有效符号数量;所述第二传输时间单元为所述第一传输时间单元的上一个传输时间单元或下一个传输时间单元。
- 如权利要求6所述的方法,其特征在于,其中,所述第一传输时间单元内的有效符号数量大于所述第二传输时间单元的有效符号数量,或者所述第一传输时间单元内的有效符号数量小于所述第二传输时间单元的有效符号数量。
- 如权利要求6或7所述的方法,其特征在于,其中,所述第二传输时间单元为采用所述第二定时提前量进行所述上行信号传输的传输时间单元,或者所述第二传输时间单元为进行下行信号传输的传输时间单元;其中,当所述第一定时提前量大于所述第二定时提前量时,所述第二传输时间单元为所述第一传输时间单元的上一个传输时间单元;和/或当所述第一定时提前量小于所述第二定时提前量时,所述第二传输时间单元为所述第二传输时间单元的下一个传输时间单元。
- 如权利要求6至8中任意一项所述的方法,其特征在于,其中,第一传输时间段为针对所述第一传输时间单元采用所述第一定时提前量进行所述上行信号传输的时间 段,第二传输时间段为针对所述第二传输时间单元采用所述第二定时提前量进行所述上行信号传输的时间段,或所述第二传输时间段为进行下行信号传输的时间段;所述第一传输时间段与所述第二传输时间段不重叠,或者除循环前缀之外的部分不重叠。
- 如权利要求1至9中任意一项所述的方法,其特征在于,其中,所述第一时间调整参数用于指示偏移量,所述偏移量为所述第一定时提前量相对于所述第二定时提前量的偏移量。
- 如权利要求1-10任一项所述的方法,其特征在于:所述第一指示信息包含一段时间内是否执行干扰删除操作的通知。
- 如权利要求1-11任一项所述的方法,其特征在于,所述第一时间调整参数为专用于所述终端设备的,或者所述第一时间调整参数为所述第一基站下的小区内的终端设备共享的。
- 如权利要求1-12任一项所述的方法,其特征在于,所述第一基站将所述第一时间调整参数和所述第二时间调整参数发送给终端设备,包括:所述第一基站采用半静态的方式将所述第一时间调整参数和所述第二时间调整参数发送给所述终端设备。
- 一种通信方法,其特征在于,所述方法包括:终端设备从第一基站接收第一时间调整参数和第二时间调整参数,所述第一时间调整参数和所述第二时间调整参数用于指示所述终端设备向所述第一基站发送上行信号的第一定时提前量和第二定时提前量;所述终端设备从所述第一基站接收第一指示信息,所述第一指示信息用于指示所述第一定时提前量和所述第二定时提前量中的一个;所述终端设备根据所述第一指示信息确定所述第一定时提前量和所述第二定时提前量中的一个;所述终端设备使用所述确定的定时提前量进行上行信号的传输。
- 根据权利要求14所述的方法,其特征在于,在所述终端设备从第一基站接收第一时间调整参数和第二时间调整参数之前,所述方法还包括:所述终端设备向所述第一基站发送随机接入前导信号,所述随机接入前导信号用于确定所述第二时间调整参数。
- 根据权利要求14或15所述的方法,其特征在于,所述第一定时提前量被配置为使得所述上行信号的符号与干扰信号的符号对齐,所述干扰信号为第二基站发送的下行信号,所述第二基站与所述第一基站采用相同频段。
- 根据权利要求14至16中任意一项所述的方法,其特征在于:所述第一指示信息用于指示所述终端设备针对第一传输时间单元采用所述第一定时提前量。
- 如权利要求17所述的方法,其特征在于,还包括:所述终端设备从所述第一基站接收第二指示信息,所述第二指示信息用于指示所述第一传输时间单元内的有效符号数量或第二传输时间单元的有效符号数量;所述第二传输时间单元为所述第一传输时间单元的上一个传输时间单元或下一个传输时间单元。
- 如权利要求18所述的方法,其特征在于,其中,所述第一传输时间单元内的有效符号数量大于所述第二传输时间单元的有效符号数量,或者所述第一传输时间单元内的有效符号数量小于所述第二传输时间单元的有效符号数量。
- 如权利要求18或19所述的方法,其特征在于,其中,所述第二传输时间单元为采用所述第二定时提前量进行所述上行信号传输的传输时间单元,或者所述第二传输时间单元为进行下行信号传输的传输时间单元;其中,当所述第一定时提前量大于所述第二定时提前量时,所述第二传输时间单元为所述第一传输时间单元的上一个传输时间单元;和/或当所述第一定时提前量小于所述第二定时提前量时,所述第二传输时间单元为所述第二传输时间单元的下一个传输时间单元。
- 如权利要求18至20中任意一项所述的方法,其特征在于,其中,第一传输时间段为针对所述第一传输时间单元采用所述第一定时提前量进行所述上行信号传输的时间段,第二传输时间段为针对所述第二传输时间单元采用所述第二定时提前量进行所述上行信号传输的时间段,或所述第二传输时间段为进行下行信号传输的时间段;所述第一传输时间段与所述第二传输时间段不重叠,或者除循环前缀之外的部分不重叠。
- 如权利要求14至21中任意一项所述的方法,其特征在于,其中,所述第一时间调整参数用于指示偏移量,所述偏移量为所述第一定时提前量相对于所述第二定时提前量的偏移量。
- 如权利要求14至22中任一所述的方法,其特征在于:所述第一指示信息包含一段时间内是否执行干扰删除操作的通知。
- 如权利要求14-23任一项所述的方法,其特征在于,所述第一时间调整参数为专用于所述终端设备的,或者所述第一时间调整参数为所述第一基站下的小区内的终端设备共享的。
- 如权利要求14-24任一项所述的方法,其特征在于,所述终端设备从第一基站接收第一时间调整参数和第二时间调整参数,包括:所述终端设备通过半静态的方式从第一基站接收第一时间调整参数和第二时间调整参数。
- 一种第一基站,其特征在于,包括:处理单元,用于确定第一时间调整参数和第二时间调整参数;发送单元,用于将所述第一时间调整参数和所述第二时间调整参数发送给终端设备,其中,所述第一时间调整参数和所述第二时间调整参数用于指示所述终端设备向所述第一基站发送上行信号的第一定时提前量和第二定时提前量;所述发送单元还用于向所述终端设备发送第一指示信息,所述第一指示信息用于指示所述终端设备采用所述第一定时提前量和所述第二定时提前量中的一个。
- 根据权利要求26所述的第一基站,其特征在于:所述处理单元用于根据干扰信号的到达时间确定所述第一时间调整参数,其中,所述干扰信号为第二基站发送的下行信号,所述第二基站与所述第一基站采用相同频段。
- 根据权利要求27所述的第一基站,其特征在于:所述第一基站确定第二时间调整参数,包括:所述第一基站根据所述终端设备发送的随机接入前导信号确定所述第二时间调整参数。
- 根据权利要求27或28所述的第一基站,其特征在于:所述第一定时提前量被配置为使得所述上行信号的符号与所述干扰信号的符号对齐。
- 根据权利要求27至29中任意一项所述的第一基站,其特征在于:所述第一指示信息用于指示所述终端设备针对第一传输时间单元采用所述第一定时提前量。
- 根据权利要求30所述的第一基站,其特征在于:所述发送单元还用于向所述终端设备发送第二指示信息,所述第二指示信息用于指示所述第一传输时间单元内的有效符号数量或第二传输时间单元的有效符号数量;所述第二传输时间单元为所述第一传输时间单元的上一个传输时间单元或下一个传输时间单元。
- 如权利要求31所述的第一基站,其特征在于,其中,所述第一传输时间单元内的有效符号数量大于所述第二传输时间单元的有效符号数量,或者所述第一传输时间单元内的有效符号数量小于所述第二传输时间单元的有效符号数量。
- 如权利要求31或32所述的第一基站,其特征在于,其中,所述第二传输时间单元为采用所述第二定时提前量进行所述上行信号传输的传输时间单元,或者所述第二传输时间单元为进行下行信号传输的传输时间单元;其中,当所述第一定时提前量大于所述第二定时提前量时,所述第二传输时间单元为所述第一传输时间单元的上一个传输时间单元;和/或当所述第一定时提前量小于所述第二定时提前量时,所述第二传输时间单元为所述第二传输时间单元的下一个传输时间单元。
- 如权利要求31至33中任意一项所述的第一基站,其特征在于,其中,第一传输时间段为针对所述第一传输时间单元采用所述第一定时提前量进行所述上行信号传输的时间段,第二传输时间段为针对所述第二传输时间单元采用所述第二定时提前量进行所述上行信号传输的时间段,或所述第二传输时间段为进行下行信号传输的时间段;所述第一传输时间段与所述第二传输时间段不重叠,或者除循环前缀之外的部分不重叠。
- 如权利要求26至34中任意一项所述的第一基站,其特征在于,其中,所述第一时间调整参数用于指示偏移量,所述偏移量所述第一定时提前量相对于所述第二定时提前量的偏移量。
- 如权利要求26-35任一项所述的第一基站,其特征在于:所述第一指示信息包含一段时间内是否执行干扰删除操作的通知。
- 如权利要求26-36任一项所述的第一基站,其特征在于,所述第一时间调整参数为专用于所述终端设备的,或者所述第一时间调整参数为所述第一基站下的小区内的终端设备共享的。
- 如权利要求26-37任一项所述的第一基站,其特征在于,所述将所述第一时间调整参数和所述第二时间调整参数发送给终端设备,包括:所述采用半静态的方式将所述第一时间调整参数和所述第二时间调整参数发送给所述终端设备。
- 一种终端设备,其特征在于,包括:接收单元,用于从第一基站接收第一时间调整参数和第二时间调整参数,所述第一时间调整参数和所述第二时间调整参数用于指示所述终端设备向所述第一基站发送上行信号的第一定时提前量和第二定时提前量;所述接收单元还用于从所述第一基站接收第一指示信息,所述第一指示信息用于指示所述第一定时提前量和所述第二定时提前量中的一个;处理单元,用于根据所述第一指示信息确定所述第一定时提前量和所述第二定时提前量中的一个;以及发送单元,用于使用所述确定的定时提前量进行上行信号的传输。
- 根据权利要求39所述的终端设备,其特征在于:所述发送单元还用于向所述第一基站发送随机接入前导信号,所述随机接入前导信号用于确定所述第二时间调整参数。
- 根据权利要求39或40所述的终端设备,其特征在于:所述第一定时提前量被配置为使得所述上行信号的符号与干扰信号的符号对齐,所述干扰信号为第二基站发送的下行信号,所述第二基站与所述第一基站采用相同频段。
- 根据权利要求39或41所述的终端设备,其特征在于:所述第一指示信息用于指示所述终端设备针对第一传输时间单元采用所述第一定时提前量。
- 根据权利要求42所述的终端设备,其特征在于:所述接收单元还用于从所述第一基站接收第二指示信息,所述第二指示信息用于指示所述第一传输时间单元内的有效符号数量或第二传输时间单元的有效符号数量;所述第二传输时间单元为所述第一传输时间单元的上一个传输时间单元或下一个传输时间单元。
- 根据权利要求43所述的终端设备,其特征在于:其中,所述第一传输时间单元内的有效符号数量大于所述第二传输时间单元的有效符号数量,或者所述第一传输时间单元内的有效符号数量小于所述第二传输时间单元的有效符号数量。
- 根据权利要求43或44所述的终端设备,其特征在于:其中,所述第二传输时间单元为采用所述第二定时提前量进行所述上行信号传输的传输时间单元,或者所述第二传输时间单元为进行下行信号传输的传输时间单元;其中,当所述第一定时提前量大于所述第二定时提前量时,所述第二传输时间单元为所述第一传输时间单元的上一个传输时间单元;和/或当所述第一定时提前量小于所述第二定时提前量时,所述第二传输时间单元为所述第二传输时间单元的下一个传输时间单元。
- 根据权利要求43至45中任一所述的终端设备,其特征在于:其中,第一传输时间段为针对所述第一传输时间单元采用所述第一定时提前量进行所述上行信号传输的时间段,第二传输时间段为针对所述第二传输时间单元采用所述第二定时提前量进行所述上行信号传输的时间段,或所述第二传输时间段为进行下行信号传输的时间段;所述第一传输时间段与所述第二传输时间段不重叠,或者除循环前缀之外的部分不重叠。
- 根据权利要求39至46中任一所述的终端设备,其特征在于:其中,所述第一时间调整参数用于指示偏移量,所述偏移量所述第一定时提前量相对于所述第二定时提前量的偏移量。
- 根据权利要求39至47中任一所述的终端设备,其特征在于:其中,所述第一指示信息包含一段时间内是否执行干扰删除操作的通知。
- 根据权利要求39至48中任一所述的终端设备,其特征在于:所述第一时间调整参数为专用于所述终端设备的,或者所述第一时间调整参数为所述第一基站下的小区内的终端设备共享的。
- 根据权利要求39至49中任一所述的终端设备,其特征在于:所述备从第一基站接收第一时间调整参数和第二时间调整参数,包括:通过半静态的方式从第一基站接收第一时间调整参数和第二时间调整参数。
- 一种计算机可读存储介质,其上存储有计算机程序或指令,当所述计算机程序或指令由处理器执行时,实现权利要求1-25任一项所述的方法。
- 一种装置,其包含处理器和存储器,所述存储器上存储有计算机程序或指令,其特征在于:所述处理器执行所述计算机程序时,实现如权利要求1-25任一项所述的方法。
- 一种计算机程序,当其被处理器执行时,实现如权利要求1-25任一项所述的方法。
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US20190222411A1 (en) | 2019-07-18 |
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CN107889261B (zh) | 2021-05-18 |
EP3512288A1 (en) | 2019-07-17 |
US10938546B2 (en) | 2021-03-02 |
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