WO2016184273A1 - 中继选择及发现的方法、装置及*** - Google Patents
中继选择及发现的方法、装置及*** Download PDFInfo
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- WO2016184273A1 WO2016184273A1 PCT/CN2016/078866 CN2016078866W WO2016184273A1 WO 2016184273 A1 WO2016184273 A1 WO 2016184273A1 CN 2016078866 W CN2016078866 W CN 2016078866W WO 2016184273 A1 WO2016184273 A1 WO 2016184273A1
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- terminal
- relay
- base station
- remote
- discovery
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W8/00—Network data management
- H04W8/005—Discovery of network devices, e.g. terminals
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W48/00—Access restriction; Network selection; Access point selection
- H04W48/16—Discovering, processing access restriction or access information
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W48/00—Access restriction; Network selection; Access point selection
- H04W48/20—Selecting an access point
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
- H04W88/02—Terminal devices
- H04W88/04—Terminal devices adapted for relaying to or from another terminal or user
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
Definitions
- This application relates to, but is not limited to, the field of communications.
- the cellular communication system has realized the multiplex of limited spectrum resources, so that the wireless communication technology has been vigorously developed.
- a cellular system when there is a service between two user equipments (UEs), the service data of the user equipment 1 (UE1) to the user equipment 2 (UE2) is first transmitted to the UE1 through the air interface.
- a base station also referred to as an eNB
- the base station transmits the user data to the base station of the cell where the UE2 is located, and the base station transmits the service data to the UE2 through the air interface.
- the service data transmission from UE2 to UE1 adopts a similar processing flow.
- 1 is a schematic diagram of cellular communication when a UE is located in the same base station cell in the related art. As shown in FIG. 1, when UE1 and UE2 are located in the same cell, although two UEs are covered by a cell of the same base station, one data transmission is performed. Two wireless spectrum resources will still be consumed.
- the above-described cellular communication method is obviously not the optimal communication method.
- D2D Device-to-Device
- FIG. 2 is a schematic diagram of a D2D communication system in the related art.
- service data is not forwarded by a base station, and is directly transmitted by a source user equipment to a target user equipment through an air interface, and may also be referred to as a proximity service (Proximity Service). , referred to as ProSe).
- ProSe proximity service
- This communication mode is different from the communication mode of a conventional cellular system.
- D2D not only saves wireless spectrum resources, but also reduces the data transmission pressure of the core network.
- Cellular network-based D2D communication is a new technology that directly communicates between multiple D2D-enabled terminal devices under the control of the system. It can reduce system resource consumption, increase the spectrum efficiency of cellular communication systems, and reduce terminal transmission. Power consumption, and to a large extent save network operating costs.
- D2D includes discovery and communication, where discovery includes Type 1 (Type 1) and Type 2 (Type 2) types, and communication includes mode 1 (mode 1) and mode 2 (mode 2).
- discovery includes Type 1 (Type 1) and Type 2 (Type 2) types
- communication includes mode 1 (mode 1) and mode 2 (mode 2).
- LTE Long Term Evolution
- 3GPP 3rd Generation Partnership Project
- R12 Radio Access Network Work Group 1
- the applicable scenarios of communication include network coverage, network coverage, and network half coverage scenarios. For discovery, it only applies to the inner scene.
- an intra-coverage D2D UE acts as a relay to provide services for an out-of-band D2D UE.
- FIG. 3 is a schematic diagram of a UE-to-network relay communication scenario in the related art.
- an in-band D2D UE A also referred to as a relay UE
- an out-of-band D2D UE B also referred to as The remote remote terminal (remote UE) provides relay service, and performs control and data relay between the base station and the D2D UE B.
- the D2D UE A and the base station are Uu interfaces of the LTE cellular network, which substantially assume the role of a wireless backhaul link; the D2D UE A and the D2D UE B communicate on the system uplink resources in a D2D manner. There is a side link between them (Sidelink).
- the D2D UE A acts as a relay UE, and actually achieves the function of extending the coverage of the cellular network.
- the connection communication between the network side and the external user is realized.
- the intra-coverage D2D UE acts as a relay to provide services for the in-coverage D2D UE.
- the in-band D2D UE A also referred to as a relay UE
- the in-band D2D UE C also referred to as an in-cover remote UE
- Relay forwarding is another case of UE-to-network relay.
- the problem that must be solved is how to select a suitable in-coverage D2D UE to act as a relay UE, and how to implement mutual discovery between the remote UE and the relay UE.
- This paper provides a method, device and system for relay selection and discovery to solve at least the problem of control transmission and data transmission between a base station and a remote terminal in a semi-coverage scenario.
- a method of relay selection and discovery including:
- the terminal measures the link quality between the terminal and the base station
- the terminal acts as a relay terminal to send a corresponding relay discovery signal.
- the link quality includes at least one of the following:
- the terminal receives the power RSRP according to the reference signal calculated by the pilot transmitted by the base station;
- the terminal receives the quality RSRQ according to the reference signal calculated by the pilot transmitted by the base station;
- the path loss calculated by the terminal according to the pilot transmitted by the base station is the path loss calculated by the terminal according to the pilot transmitted by the base station.
- the case where the link quality meets the first threshold value includes at least one of the following:
- the link quality of the backhaul link between the terminal and the base station is greater than the terminal of the first lower limit.
- the first upper limit value and/or the first lower limit value include at least one of the following:
- the first upper limit value and/or the first lower limit value predefined in the protocol predefined in the protocol
- the first upper limit value and/or the first lower limit value preconfigured on the network side;
- the relay discovery signal includes at least one of the following:
- the method further includes:
- the relay discovery signal is sent on a pre-configured relay discovery resource or on a relay discovery resource configured by the base station.
- the method further includes:
- a terminal that satisfies the first threshold corresponding to the link quality, and sends a request for the terminal to act as a relay base station to the base station;
- the terminal receives a relay terminal selection decision of the base station, and selects the terminal to serve as a relay terminal according to the relay terminal selection decision, wherein the information determining the relay terminal selection decision includes at least one of the following: the terminal and the The uplink quality information of the backhaul link between the base stations, the mobility information of the terminal, and the power information of the terminal.
- the request that the terminal acts as a relay terminal is carried on a physical uplink control channel PUCCH or a physical uplink traffic channel PUSCH.
- a method of relay selection and discovery including:
- the remote terminal monitors the relay discovery signal sent by the terminal, selects the relay terminal according to the relay discovery signal, and sends a corresponding request message to the relay terminal; wherein the request information is used by the relay terminal to request the base station Following the transmission.
- the remote terminal monitors the relay discovery signal sent by the terminal, and selects the relay terminal according to the relay discovery signal, including one of the following:
- the remote terminal measures the link quality between the remote terminal and the relay terminal, and selects a relay terminal that meets the second threshold according to the quality of the link;
- the remote terminal randomly selects a relay terminal in the relay terminal
- the remote terminal selects the relay terminal with the best link quality.
- the link quality includes at least one of the following:
- the remote terminal receives the reference signal calculated according to the pilot or data symbol sent by the relay terminal Power RSRP;
- the reference signal received by the remote terminal according to the pilot or data symbol transmitted by the relay terminal receives the quality RSRQ;
- the signal to interference plus noise ratio SINR calculated by the remote terminal according to the pilot or data symbol sent by the relay terminal;
- the path loss calculated by the remote terminal according to the pilot or data symbol transmitted by the relay terminal.
- the selecting the relay terminal that meets the second threshold includes:
- the relay terminal of the side link of the relay terminal is selected to be greater than the second lower limit.
- the second lower limit value includes at least one of the following:
- the request information sent by the remote terminal to the relay terminal is carried by the discovery channel
- the request message includes at least one of the following: a proximity service relay terminal identity ID, a public land mobile network identity ID, and an identity ID type.
- a method of relay selection and discovery including:
- the base station selects a relay terminal for the remote terminal according to the information of the relay terminal;
- the base station sends feedback information carrying the relay terminal information to the remote terminal.
- the method includes:
- the base station When the remote terminal is located outside the network coverage, the base station receives a relay terminal candidate set and/or a link link status of the relay terminal that is forwarded by the relay terminal using the physical uplink control channel PUSCH, and the relay terminal candidate set And/or the link status of the edge link is that the remote terminal sends to the relay terminal by using the discovery channel;
- the base station When the remote terminal is located in the network coverage, the base station receives a link terminal candidate set and/or a link link status of the remote terminal using the physical uplink control channel PUSCH.
- the feedback information includes at least one of the following:
- the remote terminal identifies the ID information, and the relay terminal is adjacent to the service identity information.
- a device for relay selection and discovery located on the terminal side, comprising:
- a measuring module configured to: measure a link quality between the terminal and the base station;
- the first sending module is configured to: when the link quality meets the first threshold, the terminal acts as a relay terminal to send a corresponding relay discovery signal.
- a device for relay selection and discovery, located on the remote terminal side, includes:
- the monitoring module is configured to: monitor a relay discovery signal sent by the terminal;
- the first selection module is configured to: select a relay terminal according to the relay discovery signal, and send a corresponding request message to the relay terminal, wherein the request information is used by the relay terminal to request a relay transmission from the base station.
- a device for relay selection and discovery located at the base station side, includes:
- a second selection module configured to: select a relay terminal for the remote terminal according to the information of the relay terminal;
- the second sending module is configured to: send feedback information carrying the relay terminal information to the remote terminal.
- a system for relay selection and discovery comprising: a terminal, a remote terminal, a relay terminal, and a base station;
- the terminal is configured to: measure a link quality between the terminal and the base station, where the terminal is within the network coverage; if the link quality meets the first threshold, the terminal acts as the relay terminal to send the corresponding Relay discovery signal;
- the remote terminal is configured to: monitor the relay discovery signal, select a relay terminal according to the relay discovery signal, and send a corresponding request message to the relay terminal, where the request information is used by the relay terminal to The base station requests a relay transmission.
- a computer readable storage medium storing computer executable instructions for performing the method of any of the above.
- the terminal is used to measure the link quality between the terminal and the base station, and the chain When the path quality meets the first threshold, the terminal acts as a relay terminal to send a corresponding relay discovery signal, which solves the problem of control transmission and data transmission between the base station and the remote terminal in the semi-coverage scenario, and implements the network side. Communicate with the connection of the external terminal.
- 1 is a schematic diagram of cellular communication when UEs are located in the same base station cell in the related art
- FIG. 2 is a schematic diagram of a D2D communication system in the related art
- FIG. 3 is a schematic diagram of a UE-to-network relay communication scenario in the related art
- FIG. 4 is a flowchart 1 of a method for relay selection and discovery according to an embodiment of the present invention.
- FIG. 5 is a second flowchart of a method for relay selection and discovery according to an embodiment of the present invention.
- FIG. 6 is a flowchart 3 of a method for relay selection and discovery according to an embodiment of the present invention.
- FIG. 7 is a structural block diagram 1 of an apparatus for relay selection and discovery according to an embodiment of the present invention.
- FIG. 8 is a structural block diagram 2 of an apparatus for relay selection and discovery according to an embodiment of the present invention.
- FIG. 9 is a structural block diagram 3 of an apparatus for relay selection and discovery according to an embodiment of the present invention.
- FIG. 10 is a first schematic diagram of a relay selection and discovery process according to an embodiment of the present invention.
- FIG. 11 is a second schematic diagram of a relay selection and discovery process according to an embodiment of the present invention.
- FIG. 12 is a third schematic diagram of a relay selection and discovery process according to an embodiment of the present invention.
- FIG. 13 is a fourth schematic diagram of a relay selection and discovery process according to an embodiment of the present invention.
- FIG. 14 is a schematic diagram 5 of a relay selection and discovery process according to an embodiment of the present invention.
- 15 is a sixth diagram of a relay selection and discovery flow in accordance with an embodiment of the present invention.
- FIG. 4 is a flowchart 1 of a method for relay selection and discovery according to an embodiment of the present invention. As shown in FIG. 4, the process includes the following steps. step:
- Step S402 the terminal measures the link quality between the terminal and the base station
- Step S404 If the link quality meets the first threshold, the terminal acts as a relay terminal to send a corresponding relay discovery signal.
- the terminal measures the link quality between the terminal and the base station. If the link quality meets the first threshold, the terminal acts as a relay terminal to send a corresponding relay discovery signal, and solves the base station in the half coverage scenario.
- the problem of control transmission and data transmission between the remote terminal and the remote terminal enables communication between the network side and the external terminal.
- the link quality may include:
- the reference signal receiving power (Reference Signal Receiving Power, referred to as RSRP) calculated by the terminal according to the pilot transmitted by the base station;
- the reference signal receiving quality (Reference Signal Receiving Quality, referred to as RSRQ) calculated by the terminal according to the pilot transmitted by the base station;
- SINR Signal to Interference plus Noise Ratio
- the path loss calculated by the terminal according to the pilot transmitted by the base station is the path loss calculated by the terminal according to the pilot transmitted by the base station.
- the case where the link quality meets the first threshold value includes at least one of the following:
- the link quality of the backhaul link between the terminal and the base station is greater than the terminal of the first lower limit.
- the first upper limit value and/or the first lower limit value include at least one of the following: The first upper limit value and/or the first lower limit value predefined in the discussion; the first upper limit value and/or the first lower limit value preconfigured on the network side; a threshold value in the current system.
- the relay discovery signal includes at least one of: identity identification information of the terminal; link information between the terminal and the base station.
- the relay discovery signal is sent on a pre-configured relay discovery resource, or is sent on a relay discovery resource configured by the base station.
- the terminal that meets the first threshold corresponding to the link quality sends a request to the base station to act as a relay base station;
- the terminal receives the relay terminal selection decision of the base station, and selects the terminal in the terminal to act as the relay terminal according to the relay terminal selection decision, wherein the information determining the relay terminal selection decision includes at least one of the following: the terminal and the base station The uplink quality information between the backhaul link, the mobility information of the terminal, and the terminal power information.
- the request of the terminal to act as a relay terminal is carried on a Physical Uplink Control CHannel (PUCCH) or a Physical Uplink Shared Channel (PUSCH).
- PUCCH Physical Uplink Control CHannel
- PUSCH Physical Uplink Shared Channel
- FIG. 5 is a second flowchart of a method for relay selection and discovery according to an embodiment of the present invention. As shown in FIG. 5, the process includes the following steps. step:
- Step S502 The remote terminal monitors the relay discovery signal sent by the terminal.
- Step S504 selecting a relay terminal according to the relay discovery signal, and transmitting a corresponding request message to the relay terminal, wherein the request information is used by the relay terminal to request a relay transmission from the base station.
- the remote terminal monitors the relay discovery signal sent by the terminal, selects the relay terminal according to the relay discovery signal, and sends a corresponding request message to the relay terminal, where the request information is used for the relay terminal.
- Requesting the relay transmission to the base station solves the problem of control transmission and data transmission between the base station and the remote terminal in the semi-coverage scenario, and realizes the connection communication between the network side and the coverage terminal.
- the remote terminal monitors the relay discovery signal sent by the terminal, and selects the relay terminal according to the relay discovery signal to include one of the following:
- the remote terminal measures the link quality between the remote terminal and the relay terminal, and selects a relay terminal that meets the second threshold according to the quality of the link;
- the remote terminal randomly selects a relay terminal in the relay terminal
- the remote terminal selects the relay terminal with the best link quality.
- the link quality includes at least one of the following:
- the remote terminal receives the power RSRP according to the reference signal calculated by the pilot or the data symbol transmitted by the relay terminal;
- the reference signal received by the remote terminal according to the pilot or data symbol transmitted by the relay terminal receives the quality RSRQ;
- the signal to interference plus noise ratio SINR calculated by the remote terminal according to the pilot or data symbol sent by the relay terminal;
- the path loss calculated by the remote terminal according to the pilot or data symbol transmitted by the relay terminal.
- the selecting the relay terminal that satisfies the second threshold includes: selecting a chain of side links of the relay terminal The relay terminal whose road quality is greater than the second lower limit value.
- the second lower limit value includes at least one of the following: a second lower limit value predefined in the protocol; the second lower limit value preconfigured on the network side; and a threshold value in the current system.
- the request information sent by the remote terminal to the relay terminal is carried by the discovery channel; wherein the request message includes at least one of the following: a proximity service relay terminal identity ID, and a public land mobile network identity identifier. ID, identity ID type.
- FIG. 6 is a flowchart 3 of a method for relay selection and discovery according to an embodiment of the present invention. As shown in FIG. 6, the process includes the following steps. step:
- Step S602 the base station selects a relay terminal for the remote terminal according to the information of the relay terminal.
- Step S604 the base station sends feedback information carrying the relay terminal information to the remote terminal.
- the base station selects a relay end for the remote terminal according to the information of the relay terminal.
- the base station sends the feedback information carrying the relay terminal information to the remote terminal, and solves the problem of control transmission and data transmission between the base station and the remote terminal in the semi-coverage scenario, and implements network side and coverage.
- the connection of the external terminal is communicated.
- the base station before the base station selects a relay terminal for the remote terminal according to the information of the relay terminal, the base station includes:
- the base station When the remote terminal is located outside the network coverage, the base station receives a relay terminal candidate set and/or a link link status of the relay terminal that is forwarded by the relay terminal using the physical uplink control channel PUSCH, and the relay terminal candidate set And/or the link status of the side link is that the remote terminal transmits to the relay terminal by using a discovery channel;
- the base station When the remote terminal is located in the network coverage, the base station receives the relay terminal candidate set and/or the side link link status of the remote terminal using the physical uplink control channel PUSCH.
- the feedback information includes at least one of the following: the remote terminal identity ID (identity) information, and the relay terminal proximity service (ProSe) identity information.
- the embodiment of the invention further provides a computer readable storage medium storing computer executable instructions for performing the above method of relay selection and discovery.
- a device for relay selection and discovery is also provided, which is used to implement the above-mentioned embodiments and optional embodiments, and has not been described again.
- the term “module” may implement a combination of software and/or hardware of a predetermined function.
- the devices described in the following embodiments may be implemented in software, hardware, or a combination of software and hardware, is also possible and contemplated.
- FIG. 7 is a structural block diagram of an apparatus for relay selection and discovery according to an embodiment of the present invention. As shown in FIG. 7, the apparatus is located on a terminal side, and the apparatus includes:
- the measuring module 72 is configured to: measure a link quality between the terminal and the base station;
- the first sending module 74 is configured to: when the link quality meets the first threshold, the terminal acts as a relay terminal to send a corresponding relay discovery signal.
- FIG. 8 is a structural block diagram 2 of an apparatus for relay selection and discovery according to an embodiment of the present invention. As shown in FIG. 8, the terminal is located on the terminal side, and the device includes:
- the monitoring module 82 is configured to: monitor the relay discovery signal sent by the terminal;
- the first selection module 84 is configured to: select a relay terminal according to the relay discovery signal, and send a corresponding request message to the relay terminal, wherein the request information is used by the relay terminal to request a relay transmission from the base station.
- FIG. 9 is a structural block diagram 3 of an apparatus for relay selection and discovery according to an embodiment of the present invention. As shown in FIG. 9, the apparatus is located at a base station side, and the apparatus includes:
- the second selection module 92 is configured to: select a relay terminal for the remote terminal according to the information of the relay terminal;
- the second sending module 94 is configured to: send feedback information carrying the relay terminal information to the remote terminal.
- a system for relay selection and discovery including: a terminal, a remote terminal, a relay terminal, and a base station;
- the terminal is configured to: measure a link quality between the terminal and the base station, where the terminal is within the network coverage; if the link quality meets the first threshold, the terminal acts as the relay terminal to send the corresponding Relay discovery signal;
- the remote terminal is configured to: monitor the relay discovery signal, select a relay terminal according to the relay discovery signal, and send a corresponding request message to the relay terminal, where the request information is used by the relay terminal to The base station requests a relay transmission.
- This embodiment provides a method for selecting and discovering a relay, and the steps include:
- Step 11 The intra-coverage D2D UE periodically measures the link quality between the UE and the base station, and the D2D UE that meets the specified threshold range acts as a relay UE, and periodically transmits a relay discovery signal, which is in the foregoing embodiment.
- the function and function of the first threshold are the same;
- Step 12 The remote UE listens to the relay discovery signal sent by the surrounding relay UE, selects a relay UE serving itself, and sends a corresponding request message to the selected relay UE; or the eNB selects a relay UE for the remote UE;
- Step 13 If the remote UE selects the relay UE by itself, when the relay UE listens to the request information sent by the remote UE, it uses the PUCCH or the PUSCH to request the relay transmission to the base station. If the relay UE is selected by the eNB, the eNB transmits corresponding feedback information.
- the quality of the link between the in-coverage D2D UE and the base station includes: RSRP (Reference Signal Receiving Power) and/or RSRQ (Reference Signal Receiving Quality) calculated by the intra-D2D UE according to the pilot transmitted by the base station. Or SINR (Signal to Interference plus Noise Ratio) and/or path loss.
- RSRP Reference Signal Receiving Power
- RSRQ Reference Signal Receiving Quality
- the threshold range includes an upper limit and/or a lower limit:
- the relay UE that meets the threshold range is a relay UE whose backhaul link quality is greater than a lower limit value and less than an upper limit value;
- the relay UE that meets the threshold range is a relay UE whose backhaul has a link quality greater than a lower limit.
- step 13 the upper limit and/or the lower limit include:
- the relay discovery signal includes ID information of the relay UE, and/or link quality information between the relay UE and the eNB, and the like.
- the relay discovery signal is sent on a pre-configured relay discovery resource or on a relay discovery resource configured by the eNB.
- the D2D UE that satisfies the specified threshold range may also first send a request to the eNB that it wishes to act as a relay UE, and then the base station according to the backhaul uplink quality, and/or the mobility of the relay UE, and/or relay
- the power of the UE or the like determines which D2D UEs act as relay UEs, and the selected relay UE periodically transmits a relay discovery signal.
- the D2D UE sends a request to the eNB to play the relay UE on the PUCCH (Physical Uplink Control Channel) or the PUSCH (Physical Uplink Shared Channel).
- PUCCH Physical Uplink Control Channel
- PUSCH Physical Uplink Shared Channel
- step 12 the manner in which the remote UE selects the relay UE includes:
- the remote UE measures the link quality between the UE and the one or more relay UEs, and selects one or more relay UEs that meet the specified threshold according to the link quality of the Sidelink, where the remote UE is in the one or more
- the relay UE randomly selects one or selects the relay UE with the best link quality
- the remote UE randomly selects one of the relay UEs that can detect the relay discovery signal or selects the relay UE with the best link quality.
- the method for obtaining the link quality of the Sidelink includes: the remote UE calculates the RSRP/RSRQ and/or the SINR and/or the path loss according to the pilot or data symbols sent by the relay UE.
- the threshold includes a lower limit, and the relay UE that meets the threshold is a relay UE whose side link has a link quality greater than the threshold;
- the lower limit includes:
- step 12 the manner in which the eNB selects the relay UE includes:
- the remote UE When the remote UE is located outside the coverage, the remote UE reports the link status of the relay UE candidate set and/or the sidelink to the relay UE by using the discovery channel, and the relay UE forwards to the eNB by using the PUSCH, and finally the eNB selects the relay for its service. UE.
- the remote UE When the remote UE is located in the coverage, the remote UE directly reports the link status of the relay UE candidate set and/or the side link to the eNB by using the PUSCH, and the eNB selects the relay UE served by the eNB.
- the request information sent by the remote UE to the relay UE is carried by the discovery channel, and includes information such as a ProSe Relay UE ID, a PLMN ID, and an ID type.
- the feedback information carries the UE ID information of the relay service selected by the base station, and the ProSe Relay UE ID of the selected relay UE.
- FIG. 10 is a first schematic diagram of a relay selection and discovery process according to an embodiment of the present invention. As shown in FIG. 10, the method includes the steps of: the remote UE is located outside the coverage or within the coverage, and the relay UE that sends the relay discovery signal is determined by the UE itself. And the relay UE selects a relay selection and discovery process determined by the remote UE;
- FIG. 11 is a second schematic diagram of a relay selection and discovery process according to an embodiment of the present invention.
- a remote UE is located in an overlay, and a relay UE that transmits a relay discovery signal is determined by the UE itself, and the relay UE is selected by The relay selection and discovery process determined by the eNB;
- FIG. 12 is a schematic diagram 3 of a relay selection and discovery process according to an embodiment of the present invention.
- the remote UE is located outside the coverage, and the relay UE that sends the relay discovery signal is determined by the UE itself, and the selection of the Relay UE is determined by The relay selection and discovery process determined by the eNB;
- FIG. 13 is a schematic diagram 4 of a relay selection and discovery process according to an embodiment of the present invention.
- a remote UE is located in or out of coverage, and a relay UE that transmits a relay discovery signal is determined by an eNB, and a Relay UE Select the trunk selection and discovery process determined by the remote UE.
- FIG. 14 is a schematic diagram 5 of a relay selection and discovery process according to an embodiment of the present invention.
- a remote UE is located in an overlay, a relay UE that transmits a relay discovery signal is determined by an eNB, and a selection of a Relay UE is performed by an eNB.
- the relay selection and discovery process to determine;
- FIG. 15 is a schematic diagram 6 of a relay selection and discovery process according to an embodiment of the present invention.
- the remote UE is located outside the coverage, and the relay UE that transmits the relay discovery signal is determined by the eNB, and the selection of the Relay UE is performed by the eNB. To determine the relay selection and discovery process.
- the remote UE is located outside the coverage or within the coverage, and the relay UE selects the relay selection and discovery process determined by the remote UE:
- the intra-coverage D2D UE periodically measures the pilot transmitted by the base station to obtain a corresponding RSRP/RSRQ or SINR or path loss.
- the system defines two thresholds of RSRP/RSRQ or SINR or path loss for the backhaul link, such as N1 and N2.
- the D2D UE acts as a relay UE
- the D2D UE acts as a relay UE and The relay discovery signal is periodically transmitted, as shown in FIG.
- the measured RSRP/RSRQ or SINR or the path loss value is greater than N1 or less than N2 or RSRP/RSRQ or SINR or the path loss value is greater than N1.
- the D2D UE first sends a request to the eNB to play the relay UE by using the PUCCH or the PUSCH, and then the base station Determining which D2D UEs act as relay UEs according to the backhaul uplink quality, and/or the mobility of the relay UE, and/or the power of the relay UE, etc., and the selected relay UE periodically sends a relay discovery signal, such as Figure 13 shows.
- the relay discovery signal is sent on the pre-configured relay discovery resource or the eNB configures the relay discovery resource, including the ID information of the relay UE and/or the link quality information between the relay UE and the eNB.
- the remote UE having the communication requirement with the base station listens to the relay discovery signal sent by the surrounding relay UE, selects a relay UE serving itself, and sends a corresponding request message to the selected relay UE.
- the relay UE measures the pilot or data symbol sent by the relay UE, and obtains the corresponding RSRP/RSRQ or SINR or path loss.
- the system defines a threshold R of RSRP/RSRQ or SINR or path loss for the sidelink.
- the remote UE When the RSRP/RSRQ or SINR or path loss value measured by the remote UE is greater than M, it is a candidate relay UE, and then the remote UE is Select one relay UE among the candidate relay UEs or select the relay UE with the best sidelink link quality.
- the remote UE can detect the discovery signal sent by the relay UE, it is included in the candidate relay UE, and the remote UE selects one relay UE among the candidate relay UEs or selects the relay UE with the best sidelink link quality.
- the remote UE sends a corresponding request message to the selected relay UE through the discovery channel, including information such as a ProSe Relay UE ID, a PLMN ID, and an ID type.
- the relay UE After the relay UE listens to the request information sent by the remote UE, it uses the PUCCH or the PUSCH to request the relay transmission to the base station.
- the base station authorizes the relay UE and the remote UE to establish a connection, thereby starting control and data transmission.
- the remote UE is located in the coverage, and the relay UE selects the relay selection and discovery process determined by the eNB:
- the intra-coverage D2D UE periodically measures the pilot transmitted by the base station to obtain a corresponding RSRP/RSRQ or SINR or path loss.
- the system defines two thresholds of RSRP/RSRQ or SINR or path loss for the backhaul link, such as N1 and N2.
- the D2D UE acts as a relay UE
- the D2D UE acts as a relay UE and Cycle
- the transmission of the relay discovery signal is shown in Figure 11.
- the measured RSRP/RSRQ or SINR or the path loss value is greater than N1 or less than N2 or RSRP/RSRQ or SINR or the path loss value is greater than N1.
- the D2D UE first sends a request to the eNB to play the relay UE by using the PUCCH or the PUSCH, and then the base station Determining which D2D UEs act as relay UEs according to the backhaul uplink quality, and/or the mobility of the relay UE, and/or the power of the relay UE, etc., and the selected relay UE periodically sends a relay discovery signal, such as Figure 14 shows.
- the relay discovery signal is sent on the pre-configured relay discovery resource or the eNB configures the relay discovery resource, including the ID information of the relay UE and/or the link quality information between the relay UE and the eNB.
- the remote UE having the communication requirement with the base station listens to the relay discovery signal sent by the surrounding relay UE, and determines the candidate relay UE.
- the system pre-configures a threshold R of RSRP/RSRQ or SINR or path loss for the sidelink.
- the relay UE is included in the candidate relay UE.
- the other is that as long as the remote UE can detect the discovery signal sent by the relay UE, it is included in the candidate relay UE.
- the remote UE directly reports the link status of the candidate relay UE and/or the side link to the eNB by using the PUSCH.
- the eNB selects the relay UE that is served by the eNB according to the reporting situation, and sends the corresponding feedback information to the remote UE by using the downlink traffic channel or the downlink control channel, where the feedback information carries the relay service UE information selected by the base station.
- the eNB authorizes the relay UE and the remote UE to establish a connection, thereby starting control and data transmission.
- the remote UE is located outside the coverage, and the relay UE selects the relay selection and discovery process determined by the eNB:
- the intra-coverage D2D UE periodically measures the pilot transmitted by the base station to obtain the corresponding RSRP/RSRQ. Or SINR or road loss.
- the system defines two thresholds of RSRP/RSRQ or SINR or path loss for the backhaul link, such as N1 and N2.
- the D2D UE acts as a relay UE
- the D2D UE acts as a relay UE and The relay discovery signal is periodically transmitted, as shown in FIG.
- the measured RSRP/RSRQ or SINR or the path loss value is greater than N1 or less than N2 or RSRP/RSRQ or SINR or the path loss value is greater than N1.
- the D2D UE first sends a request to the eNB to play the relay UE by using the PUCCH or the PUSCH, and then the base station Determining which D2D UEs act as relay UEs according to the backhaul uplink quality, and/or the mobility of the relay UE, and/or the power of the relay UE, etc., and the selected relay UE periodically sends a relay discovery signal, such as Figure 15 shows.
- the relay discovery signal is sent on the pre-configured relay discovery resource or the eNB configures the relay discovery resource, including the ID information of the relay UE and/or the link quality information between the relay UE and the eNB.
- the remote UE having the communication requirement with the base station listens to the relay discovery signal sent by the surrounding relay UE, and determines the candidate relay UE.
- the system pre-configures a threshold R of RSRP/RSRQ or SINR or path loss for the sidelink.
- the relay UE is included in the candidate relay UE.
- the other is that as long as the remote UE can detect the discovery signal sent by the relay UE, it is included in the candidate relay UE.
- the remote UE forwards the link status of the candidate relay UE and/or the sidelink to the relay UE in the candidate relay UE by using the PUSCH, and the relay UE forwards the information reported by the remote UE to the eNB by using the PUSCH.
- the eNB selects a relay UE for which the relay UE serves according to the information that is forwarded by the relay UE, and sends a corresponding feedback information to the selected relay UE by using the downlink traffic channel, where the feedback information carries the UE with the relay service selected by the base station. information.
- the eNB authorizes the relay UE and the remote UE to establish a connection, thereby starting control and data Transmission.
- the method according to the above embodiment can be implemented by means of software plus a necessary general hardware platform, and of course, by hardware, but in many cases, the former is A better implementation.
- the technical solution of the present invention in essence or the contribution to the related art can be embodied in the form of a software product stored in a storage medium (such as ROM/RAM, disk, CD-ROM).
- the method includes a plurality of instructions for causing a terminal device (which may be a mobile phone, a computer, a server, or a network device, etc.) to perform the method of the embodiment of the present invention.
- Embodiments of the present invention also provide a storage medium.
- the foregoing storage medium may be configured to store program code for performing the following steps of the implementation method:
- the foregoing storage medium may include, but not limited to, a USB flash drive, a Read-Only Memory (ROM), a Random Access Memory (RAM), a mobile hard disk, and a magnetic memory.
- ROM Read-Only Memory
- RAM Random Access Memory
- a plurality of media such as a disc or an optical disc that can store the program code of the method of the above embodiment.
- the processor executes the foregoing embodiment method according to the stored program code in the storage medium.
- modules or steps of the present invention can be implemented by a general-purpose computing device, which can be concentrated on a single computing device or distributed over a network of multiple computing devices. Alternatively, they may be implemented by program code executable by a computing device such that they may be stored in a storage device by a computing device and, in some cases, may be executed in a different order than herein.
- the steps shown or described are either made separately into a plurality of integrated circuit modules, or a plurality of modules or steps are fabricated as a single integrated circuit module. Thus, the invention is not limited to any specific combination of hardware and software.
- the embodiment of the invention solves the problem of control transmission and data transmission between the base station and the remote terminal in the semi-coverage scenario, and realizes the connection communication between the network side and the coverage terminal.
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Abstract
本文公布一种中继选择及发现的方法、装置及***,其中,该方法采用终端测量该终端和基站之间的链路质量,该链路质量满足第一预设阈值门限的情况下,该终端充当中继终端发送对应的中继发现信号。
Description
本申请涉及但不限于通信领域。
蜂窝通信***由于实现了对有限频谱资源的复用,从而使得无线通信技术得到了蓬勃发展。在蜂窝***中,当两个用户设备(User Equipment,简称为UE)之间有业务需要传输时,用户设备1(UE1)到用户设备2(UE2)的业务数据,会首先通过空口传输给UE1所在小区的基站(Base Station,或者称为eNB),该基站通过核心网将该用户数据传输给UE2所在小区的基站,该基站再将上述业务数据通过空口传输给UE2。UE2到UE1的业务数据传输采用类似的处理流程。图1是相关技术中UE位于同一基站小区时的蜂窝通信示意图,如图1所示,当UE1和UE2位于同一个蜂窝小区时,虽然两个UE由同一个基站的小区覆盖,但是一次数据传输仍然会消耗两份无线频谱资源。
如果用户设备1和用户设备2位于同一小区并且相距较近,那么上述的蜂窝通信方法显然不是最优的通信方式。随着移动通信业务的多样化,例如,社交网络、电子支付等在无线通信***中的应用越来越广泛,使得近距离用户之间的业务传输需求日益增长。因此,设备到设备(Device-to-Device,简称为D2D)的通信模式日益受到广泛关注。
图2是相关技术中一种D2D通信***示意图,如图2所示,业务数据不经过基站进行转发,直接由源用户设备通过空口传输给目标用户设备,也可称之为邻近服务(Proximity Service,简称ProSe)。这种通信模式区别于传统蜂窝***的通信模式。对于近距离通信的用户来说,D2D不但节省了无线频谱资源,而且降低了核心网的数据传输压力。基于蜂窝网的D2D通信是一种在***的控制下,在多个支持D2D功能的终端设备之间直接进行通信的新型技术,它能够减少***资源占用,增加蜂窝通信***频谱效率,降低终端发射功耗,并在很大程度上节省网络运营成本。
D2D的技术类型包括发现(discovery)和通信(communication),其中discovery包括类型1(Type 1)和类型2(Type 2)两种类型,通信包括模式1(mode 1)和模式2(mode 2)两种类型。在第三代合作伙伴计划(3rd Generation Partnership Project,简称为3GPP)无线接入网络第一工作组(Radio Access Network Work Group 1,简称为RAN1)讨论的长期演进(Long Term Evolution,简称为LTE)版本12(Release 12,简称为R12)阶段,通信的适用场景包括网络覆盖内、网络覆盖外、以及网络半覆盖场景。而对于发现,只适用于覆盖内场景。
在相关技术中,提出在半覆盖场景和覆盖外场景应用类型1发现(Type 1discovery)的需求,其中一个典型的应用就是充当中继终端(UE-to-network Relay)。
充当中继终端(UE-to-network Relay)的一种情况是在半覆盖场景下,覆盖内D2D UE充当中继(relay)为覆盖外D2D UE提供服务。
图3是相关技术中UE-to-network Relay通信场景的示意图,如图3所示,覆盖内D2D UE A(又称为中继终端(relay UE))为覆盖外D2D UE B(又称为覆盖外远端终端(remote UE))提供中继服务,在基站与D2D UE B之间进行控制及数据的中继转发。其中,D2D UE A与基站之间是LTE蜂窝网络的Uu接口,它实质上承担了无线回程链路(backhaul)的作用;D2D UE A与D2D UE B以D2D方式在***上行资源上进行通信,它们之间为边链路(Sidelink)。此时,D2D UE A作为relay UE,实际上达到了扩展蜂窝网络覆盖范围的作用,通过D2D UE A与D2D UE B之间的Sidelink传输,实现了网络侧与覆盖外用户的连接沟通。
UE-to-network Relay的另一种情况是覆盖内D2D UE充当中继(relay)为覆盖内D2D UE提供服务。如图3所示,覆盖内D2D UE A(又称为relay UE)为覆盖内D2D UE C(又称为覆盖内remote UE)提供中继服务,在基站与D2D UE C之间进行控制及数据的中继转发。
为了实现上述功能,必须要解决的问题是如何选择合适的覆盖内D2D UE充当relay UE,以及如何实现remote UE和relay UE之间的相互发现。
针对相关技术中,半覆盖场景下基站和远端终端之间的控制传输和数据
传输的问题,目前尚未提出有效的解决方案。
发明内容
以下是对本文详细描述的主题的概述。本概述并非是为了限制权利要求的保护范围。
本文提供了一种中继选择及发现的方法、装置及***,以至少解决了半覆盖场景下基站和远端终端之间的控制传输和数据传输的问题。
一种中继选择及发现的方法,包括:
终端测量该终端和基站之间的链路质量;
该链路质量满足第一阈值的情况下,该终端充当中继终端发送对应的中继发现信号。
可选地,该链路质量包括以下至少之一:
该终端根据该基站发送的导频计算的参考信号接收功率RSRP;
该终端根据该基站发送的导频计算的参考信号接收质量RSRQ;
该终端根据该基站发送的导频计算的信号与干扰加噪声比SINR;
该终端根据该基站发送的导频计算的路损。
可选地,在该第一阈值包括一个第一上限值和/或一个第一下限值的情况下,该链路质量满足第一阈值的情况包括以下至少之一:
所述终端和所述基站之间回程链路的链路质量大于该第一下限值且小于该第一上限值的终端;
所述终端和所述基站之间回程链路的链路质量大于该第一下限值的终端。
可选地,该第一上限值和/或第一下限值包括以下至少之一:
协议中预定义的该第一上限值和/或该第一下限值;
网络侧预配置的该第一上限值和/或该第一下限值;
当前***中的门限值。
可选地,该中继发现信号包括以下至少之一:
该终端的身份识别信息;
该终端和该基站之间的链路信息。
可选地,该方法还包括:
该中继发现信号在预配置的中继发现资源上发送,或者,在该基站配置的中继发现资源上发送。
可选地,该方法还包括:
满足该链路质量对应的该第一阈值的终端,向基站发送该终端充当中继基站的请求;
该终端接收基站的中继终端选择决定,根据该中继终端选择决定,选择该终端充当中继终端,其中,确定该中继终端选择决定的信息包括以下至少之一:所述终端和所述基站之间的回程链路的上行链路质量信息,该终端的移动性信息,该终端的功率信息。
可选地,该终端充当中继终端的请求承载在物理上行控制信道PUCCH或物理上行业务信道PUSCH上。
一种中继选择及发现的方法,包括:
远端终端监听终端发送的中继发现信号,根据该中继发现信号选择中继终端,并向该中继终端发送相应的请求消息;其中,该请求信息用于该中继终端向基站请求中继传输。
可选地,该远端终端监听终端发送的中继发现信号,根据该中继发现信号选择中继终端,包括以下之一:
该远端终端测量该远端终端和该中继终端之间的链路质量,并根据该链路质量选出满足第二阈值的中继终端;
该远端终端在该中继终端中随机选择中继终端;
该远端终端选择该链路质量最好的中继终端。
可选地,该链路质量包括以下至少之一:
该远端终端根据该中继终端发送的导频或数据符号计算的参考信号接收
功率RSRP;
该远端终端根据该中继终端发送的导频或数据符号计算的参考信号接收质量RSRQ;
该远端终端根据该中继终端发送的导频或数据符号计算的信号与干扰加噪声比SINR;
该远端终端根据该中继终端发送的导频或数据符号计算的路损。
可选地,在该第二阈值包括一个第二下限值的情况下,该选出满足第二阈值的中继终端包括:
选择该中继终端的边链路的链路质量大于该第二下限值的中继终端。
可选地,该第二下限值包括以下至少之一:
协议中预定义的该第二下限值;
网络侧预配置的该第二下限值;
当前***中的门限值。
可选地,该远端终端向中继终端发送的该请求信息通过发现信道承载;
其中,该请求消息包括以下至少之一:邻近服务中继终端身份标识ID,公共陆地移动网络身份标识ID,身份标识ID类型。
一种中继选择及发现的方法,包括:
基站根据中继终端的信息为远端终端选择一个中继终端;
该基站将携带有该中继终端信息的反馈信息发送给该远端终端。
可选地,该基站根据中继终端的信息为远端终端选择一个中继终端之前,包括:
当该远端终端位于网络覆盖外时,该基站接收该中继终端利用物理上行链路控制信道PUSCH转发的中继终端候选集合和/或边链路的链路状况,该中继终端候选集合和/或边链路的链路状况是该远端终端利用发现信道发送给该中继终端的;
当该远端终端位于网络覆盖内时,该基站接收该远端终端利用物理上行链路控制信道PUSCH发送的中继终端候选集合和/或边链路的链路状况。
可选地,该反馈信息包括以下至少之一:
该远端终端身份标识ID信息,该中继终端邻近服务身份标识信息。
一种中继选择及发现的装置,位于终端侧,包括:
测量模块,设置为:测量该终端和基站之间的链路质量;
第一发送模块,设置为:在该链路质量满足第一阈值的情况下,该终端充当中继终端发送对应的中继发现信号。
一种中继选择及发现的装置,位于远端终端侧,包括:
监视模块,设置为:监听终端发送的中继发现信号;
第一选择模块,设置为:根据该中继发现信号选择中继终端,并向该中继终端发送相应的请求消息,其中,该请求信息用于该中继终端向基站请求中继传输。
一种中继选择及发现的装置,位于基站侧,包括:
第二选择模块,设置为:根据中继终端的信息为远端终端选择一个中继终端;
第二发送模块,设置为:将携带有该中继终端信息的反馈信息发送给该远端终端。
一种中继选择及发现的***,包括:终端,远端终端,中继终端,基站;
所述终端设置为:测量该终端和基站之间的链路质量,其中,该终端在网络覆盖内;在该链路质量满足第一阈值的情况下,该终端充当该中继终端发送对应的中继发现信号;
该远端终端设置为:监听该中继发现信号,根据该中继发现信号选择中继终端,并向该中继终端发送相应的请求消息,其中,该请求信息用于该中继终端向该基站请求中继传输。
一种计算机可读存储介质,存储有计算机可执行指令,所述计算机可执行指令用于执行上述任一项的方法。
通过本发明实施例,采用终端测量该终端和基站之间的链路质量,该链
路质量满足第一阈值的情况下,该终端充当中继终端发送对应的中继发现信号,解决了半覆盖场景下基站和远端终端之间的控制传输和数据传输的问题,实现了网络侧与覆盖外终端的连接沟通。
在阅读并理解了附图和详细描述后,可以明白其他方面。
附图概述
图1是相关技术中UEs位于同一基站小区时的蜂窝通信示意图;
图2是相关技术中一种D2D通信***示意图;
图3是相关技术中UE-to-network Relay通信场景的示意图;
图4是根据本发明实施例的一种中继选择及发现的方法的流程图一;
图5是根据本发明实施例的一种中继选择及发现的方法的流程图二;
图6是根据本发明实施例的一种中继选择及发现的方法的流程图三;
图7是根据本发明实施例的一种中继选择及发现的装置的结构框图一;
图8是根据本发明实施例的一种中继选择及发现的装置的结构框图二;
图9是根据本发明实施例的一种中继选择及发现的装置的结构框图三;
图10是根据本发明实施例的中继选择和发现流程的示意图一;
图11是根据本发明实施例的中继选择和发现流程的示意图二;
图12是根据本发明实施例的中继选择和发现流程的示意图三;
图13是根据本发明实施例的中继选择和发现流程的示意图四;
图14是根据本发明实施例的中继选择和发现流程的示意图五;
图15是根据本发明实施例的中继选择和发现流程的示意图六。
下文中将参考附图并结合实施例说明本发明的实施方式。需要说明的是,在不冲突的情况下,本申请中的实施例及实施例中的特征可以相互组合。
需要说明的是,本文的说明书和权利要求书及上述附图中的术语“第一”、“第二”等是用于区别类似的对象,而不必用于描述特定的顺序或先后次序。
在本实施例中提供了一种中继选择及发现的方法,图4是根据本发明实施例的一种中继选择及发现的方法的流程图一,如图4所示,该流程包括如下步骤:
步骤S402,终端测量该终端和基站之间的链路质量;
步骤S404,该链路质量满足第一阈值的情况下,该终端充当中继终端发送对应的中继发现信号。
通过上述步骤,终端测量该终端和基站之间的链路质量,该链路质量满足第一阈值的情况下,该终端充当中继终端发送对应的中继发现信号,解决了半覆盖场景下基站和远端终端之间的控制传输和数据传输的问题,实现了网络侧与覆盖外终端的连接沟通。
在本实施例中,该链路质量可以包括:
该终端根据该基站发送的导频计算的参考信号接收功率(Reference Signal Receiving Power,简称为RSRP);
该终端根据该基站发送的导频计算的参考信号接收质量(Reference Signal Receiving Quality,简称为RSRQ);
该终端根据该基站发送的导频计算的信号与干扰加噪声比(Signal to Interference plus Noise Ratio,简称为SINR);
该终端根据该基站发送的导频计算的路损。
在本实施例中,在该第一阈值范围包括一个第一上限值和/或一个第一下限值的情况下,该链路质量满足第一阈值的情况包括以下至少之一:
该终端和基站之间的回程链路的链路质量大于该第一下限值且小于该第一上限值的终端;
该终端和基站之间的回程链路的链路质量大于该第一下限值的终端。
在本实施例中,该第一上限值和/或第一下限值包括以下至少之一:协
议中预定义的该第一上限值和/或该第一下限值;网络侧预配置的该第一上限值和/或该第一下限值;当前***中的门限值。
在本实施例中,该中继发现信号包括以下至少之一:该终端的身份识别信息;该终端和该基站之间的链路信息。
在本实施例中,该中继发现信号在预配置的中继发现资源上发送,或者,在该基站配置的中继发现资源上发送。
在本实施例中,满足该链路质量对应的该第一阈值的终端,向基站发送该终端充当中继基站的请求;
该终端接收基站的中继终端选择决定,根据该中继终端选择决定,选择该终端中的终端充当中继终端,其中,确定该中继终端选择决定的信息包括以下至少之一:终端和基站之间的回程链路的上行链路质量信息,该终端的移动性信息,该终端功率信息。
在本实施例中,该终端充当中继终端的请求承载在物理上行控制信道(Physical Uplink Control CHannel,简称为PUCCH)或物理上行业务信道(Physical Uplink Shared Channel,简称为PUSCH)上。
在本实施例中提供了一种中继选择及发现的方法,图5是根据本发明实施例的一种中继选择及发现的方法的流程图二,如图5所示,该流程包括如下步骤:
步骤S502,远端终端监听终端发送的中继发现信号;
步骤S504,根据该中继发现信号选择中继终端,并向该中继终端发送相应的请求消息,其中,该请求信息用于该中继终端向基站请求中继传输。
通过上述步骤,远端终端监听终端发送的中继发现信号,根据该中继发现信号选择中继终端,并向该中继终端发送相应的请求消息,其中,该请求信息用于该中继终端向基站请求中继传输,解决了半覆盖场景下基站和远端终端之间的控制传输和数据传输的问题,实现了网络侧与覆盖外终端的连接沟通。
在本实施例中,该远端终端监听终端发送的中继发现信号,根据该中继发现信号选择中继终端包括以下之一:
该远端终端测量该远端终端和该中继终端之间的链路质量,并根据该链路质量选出满足第二阈值的中继终端;
该远端终端在该中继终端中随机选择中继终端;
该远端终端选择该链路质量最好的中继终端。
在本实施例中,该链路质量包括以下至少之一:
该远端终端根据该中继终端发送的导频或数据符号计算的参考信号接收功率RSRP;
该远端终端根据该中继终端发送的导频或数据符号计算的参考信号接收质量RSRQ;
该远端终端根据该中继终端发送的导频或数据符号计算的信号与干扰加噪声比SINR;
该远端终端根据该中继终端发送的导频或数据符号计算的路损。
在本实施例中,在该第二阈值范围包括一个第二下限值的情况下,该选出满足第二阈值的中继终端包括:选择该中继终端的边链路(sidelink)的链路质量大于该第二下限值的中继终端。
在本实施例中,该第二下限值包括以下至少之一:协议中预定义的该第二下限值;网络侧预配置的该第二下限值;当前***中的门限值。
在本实施例中,该远端终端向中继终端发送的该请求信息通过发现信道承载;其中,该请求消息包括以下至少之一:邻近服务中继终端身份标识ID,公共陆地移动网络身份标识ID,身份标识ID类型。
在本实施例中提供了一种中继选择及发现的方法,图6是根据本发明实施例的一种中继选择及发现的方法的流程图三,如图6所示,该流程包括如下步骤:
步骤S602,基站根据中继终端的信息为远端终端选择一个中继终端;
步骤S604,该基站将携带有该中继终端信息的反馈信息发送给该远端终端。
通过上述步骤,基站根据中继终端的信息为远端终端选择一个中继终
端,该基站将携带有该中继终端信息的反馈信息发送给该远端终端,解决了半覆盖场景下基站和远端终端之间的控制传输和数据传输的问题,实现了网络侧与覆盖外终端的连接沟通。
在本实施例中,该基站根据中继终端的信息为远端终端选择一个中继终端之前包括:
当该远端终端位于网络覆盖外时,该基站接收该中继终端利用物理上行链路控制信道PUSCH转发的中继终端候选集合和/或边链路的链路状况,该中继终端候选集合和/或边链路(sidelink)的链路状况是该远端终端利用发现信道发送给该中继终端的;
当该远端终端位于网络覆盖内时,该基站接收该远端终端利用物理上行链路控制信道PUSCH发送的中继终端候选集合和/或边链路(sidelink)的链路状况。
在本实施例中,该反馈信息包括以下至少之一:该远端终端身份标识ID(identity)信息,该中继终端邻近服务(ProSe)身份标识信息。
本发明实施例还提供一种计算机可读存储介质,存储有计算机可执行指令,所述计算机可执行指令用于执行上述中继选择及发现的方法。
在本实施例中还提供了一种中继选择及发现的装置,该装置用于实现上述实施例及可选实施方式,已经进行过说明的不再赘述。如以下所使用的,术语“模块”可以实现预定功能的软件和/或硬件的组合。尽管以下实施例所描述的装置可以以软件来实现,但是硬件,或者软件和硬件的组合的实现也是可能并被构想的。
图7是根据本发明实施例的一种中继选择及发现的装置的结构框图一,如图7所示,该装置位于终端侧,该装置包括:
测量模块72,设置为:测量该终端和基站之间的链路质量;
第一发送模块74,设置为:在该链路质量满足第一阈值的情况下,该终端充当中继终端发送对应的中继发现信号。
图8是根据本发明实施例的一种中继选择及发现的装置的结构框图二,
如图8所示,该终端位于终端侧,该装置包括:
监视模块82,设置为:监听终端发送的中继发现信号;
第一选择模块84,设置为:根据该中继发现信号选择中继终端,并向该中继终端发送相应的请求消息,其中,该请求信息用于该中继终端向基站请求中继传输。
图9是根据本发明实施例的一种中继选择及发现的装置的结构框图三,如图9所示,该装置位于基站侧,该装置包括:
第二选择模块92,设置为:根据中继终端的信息为远端终端选择一个中继终端;
第二发送模块94,设置为:将携带有该中继终端信息的反馈信息发送给该远端终端。
在本发明实施例中,还提供了一种中继选择及发现的***,包括:终端,远端终端,中继终端,基站;
所述终端设置为:测量该终端和基站之间的链路质量,其中,该终端在网络覆盖内;在该链路质量满足第一阈值的情况下,该终端充当该中继终端发送对应的中继发现信号;
该远端终端设置为:监听该中继发现信号,根据该中继发现信号选择中继终端,并向该中继终端发送相应的请求消息,其中,该请求信息用于该中继终端向该基站请求中继传输。
实施例1:
本实施例提供了一种中继的选择及发现方法,其步骤包括:
步骤11:覆盖内D2D UE周期性测量它和基站之间的链路质量,满足规定门限范围内的D2D UE充当relay UE,并周期性的发送中继发现信号,该规定门限和上述实施例中第一阈值的功能和作用相同;
步骤12:remote UE监听周围的relay UE发送的中继发现信号,选择一个为自己服务的relay UE,并向该选中的relay UE发送相应的请求消息;或eNB为remote UE选择一个relay UE;
步骤13:如果remote UE自己选择relay UE,那么当relay UE监听到remote UE发送的请求信息后,就利用PUCCH或PUSCH向基站请求中继传输。如果由eNB选择relay UE,那么eNB发送相应的反馈信息。
在步骤11中,该覆盖内D2D UE和基站之间的链路质量包括:覆盖内D2D UE根据基站发送的导频计算的RSRP(Reference Signal Receiving Power)和/RSRQ(Reference Signal Receiving Quality)和/或SINR(Signal to Interference plus Noise Ratio)和/或路损。
在步骤11中,该门限范围包括一个上限值和/或一个下限值:
满足门限范围的relay UE为backhaul的链路质量大于下限值小于上限值的relay UE;
或者满足门限范围的relay UE为backhaul的链路质量大于下限值的relay UE。
在步骤13中,该上限值和/或下限值,包括:
在协议中事先约定,或者预配置,或者沿用当前***中的门限值。
在步骤11中,该中继发现信号包括relay UE的ID信息、和/或relay UE和eNB之间的链路质量信息等。
在步骤11中,该中继发现信号在预配置的中继发现资源上发送或者在eNB配置的中继发现资源上发送。
在步骤11中,该满足规定门限范围内的D2D UE还可以先向eNB发送自己希望充当relay UE的请求,然后基站根据backhaul上行链路质量,和/或relay UE的移动性,和/或relay UE的功率等来决定由哪些D2D UE充当relay UE,进而被选中的relay UE周期性的发送中继发现信号。
该D2D UE向eNB发送自己希望充当relay UE的请求承载在PUCCH(Physical Uplink Control Channel)或PUSCH(Physical Uplink Shared Channel)上。
在步骤12中,remote UE选择relay UE的方式包括:
Remote UE测量它和一或多个relay UE之间的链路质量,并根据Sidelink的链路质量选出满足规定门限的一或多个relay UE,remote UE在该一或多个
relay UE中随机选择一个或者选择链路质量最好的relay UE;
或者remote UE在能检测出中继发现信号的relay UE中随机选择一个或者选择链路质量最好的relay UE。
该Sidelink的链路质量的获得方式包括:remote UE根据relay UE发送的导频或数据符号计算RSRP/RSRQ和/或SINR和/或路损。
该门限包括一个下限值,满足门限的relay UE为sidelink的链路质量大于这个门限的relay UE;
该下限值,包括:
在协议中事先约定,或者由网络测预配置,或者沿用当前***中的门限值。
在步骤12中,eNB选择relay UE的方式包括:
当remote UE位于覆盖外时,该remote UE利用discovery信道将relay UE候选集合和/或sidelink的链路状况上报给relay UE,relay UE利用PUSCH转发给eNB,最终由eNB来选择为其服务的relay UE。
当remote UE位于覆盖内时,该remote UE利用PUSCH直接将relay UE候选集合和/或sidelink的链路状况上报给eNB,由eNB来选择为其服务的relay UE。
在步骤12中,该remote UE向relay UE发送的请求信息通过discovery信道承载,其中包括ProSe Relay UE ID,PLMN ID,ID类型等信息。
在步骤13中,该反馈信息携带有基站选择的relay服务的UE ID信息,以及选中的relay UE的ProSe Relay UE ID等。
图10是根据本发明实施例的中继选择和发现流程的示意图一,如图10所示,包括步骤:remote UE位于覆盖外或覆盖内,发送中继发现信号的relay UE由UE自己决定,且Relay UE的选择由remote UE来决定的中继选择和发现流程;
图11是根据本发明实施例的中继选择和发现流程的示意图二,如图11所示,remote UE位于覆盖内,发送中继发现信号的relay UE由UE自己决定,且relay UE的选择由eNB来决定的中继选择和发现流程;
图12是根据本发明实施例的中继选择和发现流程的示意图三,如图12所示,remote UE位于覆盖外,发送中继发现信号的relay UE由UE自己决定,且Relay UE的选择由eNB来决定的中继选择和发现流程;
图13是根据本发明实施例的中继选择和发现流程的示意图四,如图13所示,remote UE位于覆盖内或覆盖外,发送中继发现信号的relay UE由eNB决定,且Relay UE的选择由remote UE来决定的中继选择和发现流程。
图14是根据本发明实施例的中继选择和发现流程的示意图五,如图14所示,remote UE位于覆盖内,发送中继发现信号的relay UE由eNB决定,且Relay UE的选择由eNB来决定的中继选择和发现流程;
图15是根据本发明实施例的中继选择和发现流程的示意图六,如图15所示,remote UE位于覆盖外,发送中继发现信号的relay UE由eNB决定,且Relay UE的选择由eNB来决定的中继选择和发现流程。
实施例2:
remote UE位于覆盖外或覆盖内,relay UE的选择由remote UE来决定的中继选择和发现流程:
覆盖内D2D UE周期性测量基站发送的导频,获得相应的RSRP/RSRQ或SINR或路损。***为backhaul link定义了两个RSRP/RSRQ或SINR或路损的门限值,例如N1和N2,当该D2D UE测量得到的RSRP/RSRQ或SINR或路损值大于N1小于N2时(即位于小区边缘的D2D UE充当relay UE)或者当该D2D UE测量得到的RSRP/RSRQ或SINR或路损值大于N1时(即位于小区中心的D2D UE充当relay UE),该D2D UE就充当relay UE并周期性的发送中继发现信号,如图10所示。
或者测量得到的RSRP/RSRQ或SINR或路损值大于N1小于N2或RSRP/RSRQ或SINR或路损值大于N1的D2D UE利用PUCCH或PUSCH首先向eNB发送自己希望充当relay UE的请求,然后基站根据backhaul上行链路质量,和/或relay UE的移动性,和/或relay UE的功率等来决定由哪些D2D UE充当relay UE,进而被选中的relay UE周期性的发送中继发现信号,如图13所示。
其中,该中继发现信号在预配置的中继发现资源上发送或者由eNB配置中继发现资源,包括relay UE的ID信息和/或relay UE和eNB之间的链路质量信息等。
有和基站通信需求的remote UE监听周围relay UE发送的中继发现信号,并选择一个为自己服务的relay UE,并向选中的relay UE发送相应的请求消息。其中,relay UE的选择方式有两种,一种是remote UE测量relay UE发送的导频或数据符号,获得相应的RSRP/RSRQ或SINR或路损。***为sidelink定义了一个RSRP/RSRQ或SINR或路损的门限值M,当该remote UE测量得到的RSRP/RSRQ或SINR或路损值大于M时,就为候选relay UE,进而remote UE在候选relay UE中选择一个relay UE或选择sidelink链路质量最好的relay UE。另一种是只要remote UE能检测出relay UE发送的discovery signal,就将其纳入候选relay UE,进而remote UE在候选relay UE中选择一个relay UE或选择sidelink链路质量最好的relay UE。
remote UE向选中的relay UE发送相应的请求消息通过discovery信道承载,其中包括ProSe Relay UE ID,PLMN ID,ID类型等信息。
当relay UE监听到remote UE发送的请求信息后,就利用PUCCH或PUSCH向基站请求中继传输。
基站授权relay UE和remote UE进行连接建立,进而开始控制和数据的传输。
实施例3:
remote UE位于覆盖内,且Relay UE的选择由eNB来决定的中继选择和发现流程:
覆盖内D2D UE周期性测量基站发送的导频,获得相应的RSRP/RSRQ或SINR或路损。***为backhaul link定义了两个RSRP/RSRQ或SINR或路损的门限值,例如N1和N2,当该D2D UE测量得到的RSRP/RSRQ或SINR或路损值大于N1小于N2时(即位于小区边缘的D2D UE充当relay UE)或者当该D2D UE测量得到的RSRP/RSRQ或SINR或路损值大于N1时(即位于小区中心的D2D UE充当relay UE),该D2D UE就充当relay UE并周期
性的发送中继发现信号,如图11所示。
或者测量得到的RSRP/RSRQ或SINR或路损值大于N1小于N2或RSRP/RSRQ或SINR或路损值大于N1的D2D UE利用PUCCH或PUSCH首先向eNB发送自己希望充当relay UE的请求,然后基站根据backhaul上行链路质量,和/或relay UE的移动性,和/或relay UE的功率等来决定由哪些D2D UE充当relay UE,进而被选中的relay UE周期性的发送中继发现信号,如图14所示。
其中,该中继发现信号在预配置的中继发现资源上发送或者由eNB配置中继发现资源,包括relay UE的ID信息和/或relay UE和eNB之间的链路质量信息等。
有和基站通信需求的remote UE监听周围relay UE发送的中继发现信号,并确定候选relay UE。其中,候选relay UE的确定方式有两种,一种是remote UE测量relay UE发送的导频或数据符号,获得相应的RSRP/RSRQ或SINR或路损。***为sidelink预配置了一个RSRP/RSRQ或SINR或路损的门限值M,当该remote UE测量得到的RSRP/RSRQ或SINR或路损值大于M时,就将该relay UE纳入候选relay UE。另一种是只要remote UE能检测出来relay UE发送的discovery signal,就将其纳入候选relay UE。
该remote UE利用PUSCH直接将候选relay UE和/或sidelink的链路状况上报给eNB。
eNB根据上报情况来选择为其服务的relay UE,并利用下行业务信道或下行控制信道向remote UE发送相应的反馈信息,其中,该反馈信息中携带有基站选择的relay服务UE信息。
eNB授权该relay UE和remote UE进行连接建立,进而开始控制和数据的传输。
实施例4:
remote UE位于覆盖外,且Relay UE的选择由eNB来决定的中继选择和发现流程:
覆盖内D2D UE周期性测量基站发送的导频,获得相应的RSRP/RSRQ
或SINR或路损。***为backhaul link定义了两个RSRP/RSRQ或SINR或路损的门限值,例如N1和N2,当该D2D UE测量得到的RSRP/RSRQ或SINR或路损值大于N1小于N2时(即位于小区边缘的D2D UE充当relay UE)或者当该D2D UE测量得到的RSRP/RSRQ或SINR或路损值大于N1时(即位于小区中心的D2D UE充当relay UE),该D2D UE就充当relay UE并周期性的发送中继发现信号,如图12所示。
或者测量得到的RSRP/RSRQ或SINR或路损值大于N1小于N2或RSRP/RSRQ或SINR或路损值大于N1的D2D UE利用PUCCH或PUSCH首先向eNB发送自己希望充当relay UE的请求,然后基站根据backhaul上行链路质量,和/或relay UE的移动性,和/或relay UE的功率等来决定由哪些D2D UE充当relay UE,进而被选中的relay UE周期性的发送中继发现信号,如图15所示。
其中,该中继发现信号在预配置的中继发现资源上发送或者由eNB配置中继发现资源,包括relay UE的ID信息和/或relay UE和eNB之间的链路质量信息等。
有和基站通信需求的remote UE监听周围relay UE发送的中继发现信号,并确定候选relay UE。其中,候选relay UE的确定方式有两种,一种是remote UE测量relay UE发送的导频或数据符号,获得相应的RSRP/RSRQ或SINR或路损。***为sidelink预配置了一个RSRP/RSRQ或SINR或路损的门限值M,当该remote UE测量得到的RSRP/RSRQ或SINR或路损值大于M时,就将该relay UE纳入候选relay UE。另一种是只要remote UE能检测出来relay UE发送的discovery signal,就将其纳入候选relay UE。
该remote UE利用PUSCH将候选relay UE和/或sidelink的链路状况上报给候选relay UE中的relay UE,relay UE利用PUSCH将remote UE上报的信息转发给eNB。
eNB根据relay UE的转发的信息选择一个relay UE为其服务的relay UE,并利用下行业务信道向选中的relay UE发送相应的反馈信息,其中,该反馈信息中携带有基站选择的relay服务的UE信息。
eNB授权该relay UE和remote UE进行连接建立,进而开始控制和数据
的传输。
通过以上的实施方式的描述,本领域的技术人员可以清楚地了解到根据上述实施例的方法可借助软件加必需的通用硬件平台的方式来实现,当然也可以通过硬件,但很多情况下前者是更佳的实施方式。基于这样的理解,本发明的技术方案本质上或者说对相关技术做出贡献的部分可以以软件产品的形式体现出来,该计算机软件产品存储在一个存储介质(如ROM/RAM、磁碟、光盘)中,包括多个指令用以使得一台终端设备(可以是手机,计算机,服务器,或者网络设备等)执行本发明实施例该的方法。
本发明的实施例还提供了一种存储介质。可选地,在本实施例中,上述存储介质可以被设置为存储用于执行以下上述实施方法步骤的程序代码:
可选地,在本实施例中,上述存储介质可以包括但不限于:U盘、只读存储器(ROM,Read-Only Memory)、随机存取存储器(RAM,Random Access Memory)、移动硬盘、磁碟或者光盘等多种可以存储上述实施例方法的程序代码的介质。
可选地,在本实施例中,处理器根据存储介质中已存储的程序代码执行上述实施例方法。
显然,本领域的技术人员应该明白,上述的本发明的模块或步骤可以用通用的计算装置来实现,它们可以集中在单个的计算装置上,或者分布在多个计算装置所组成的网络上,可选地,它们可以用计算装置可执行的程序代码来实现,从而,可以将它们存储在存储装置中由计算装置来执行,并且在某些情况下,可以以不同于此处的顺序执行所示出或描述的步骤,或者将它们分别制作成多个集成电路模块,或者将它们中的多个模块或步骤制作成单个集成电路模块来实现。这样,本发明不限制于任何特定的硬件和软件结合。
以上该仅为本发明的实施例而已,并不用于限制本发明,对于本领域的技术人员来说,本发明可以有多种更改和变化。凡在本发明的精神和原则之内,所作的任何修改、等同替换、改进等,均应包含在本发明的保护范围之内。
本发明实施例解决了半覆盖场景下基站和远端终端之间的控制传输和数据传输的问题,实现了网络侧与覆盖外终端的连接沟通。
Claims (21)
- 一种中继选择及发现的方法,包括:终端测量所述终端和基站之间的链路质量;所述链路质量满足第一阈值的情况下,所述终端充当中继终端发送对应的中继发现信号。
- 根据权利要求1所述的方法,其中,所述链路质量包括以下至少之一:所述终端根据所述基站发送的导频计算的参考信号接收功率RSRP;所述终端根据所述基站发送的导频计算的参考信号接收质量RSRQ;所述终端根据所述基站发送的导频计算的信号与干扰加噪声比SINR;所述终端根据所述基站发送的导频计算的路损。
- 根据权利要求1所述的方法,其中,在所述第一阈值包括一个第一上限值和/或一个第一下限值的情况下,所述链路质量满足所述第一阈值的情况包括以下至少之一:所述终端和所述基站之间的回程链路的链路质量大于所述第一下限值且小于所述第一上限值的终端;所述终端和所述基站之间的回程链路的链路质量大于所述第一下限值的终端。
- 根据权利要求3所述的方法,其中,所述第一上限值和/或第一下限值包括以下至少之一:协议中预定义的所述第一上限值和/或所述第一下限值;网络侧预配置的所述第一上限值和/或所述第一下限值;当前***中的门限值。
- 根据权利要求1所述的方法,其中,所述中继发现信号包括以下至少之一:所述终端的身份识别信息;所述终端和所述基站之间的链路信息。
- 根据权利要求1所述的方法,所述方法还包括:所述中继发现信号在预配置的中继发现资源上发送,或者,在所述基站配置的中继发现资源上发送。
- 根据权利要求1所述的方法,所述方法还包括:满足所述链路质量对应的所述第一阈值的终端,向基站发送所述终端充当中继基站的请求;所述终端接收基站的中继终端选择决定,根据所述中继终端选择决定,选择所述终端充当中继终端,其中,确定所述中继终端选择决定的信息包括以下至少之一:所述终端和所述基站之间的回程链路的上行链路质量信息,所述终端的移动性信息,所述终端的功率信息。
- 根据权利要求7所述的方法,其中,所述终端充当中继终端的请求承载在物理上行控制信道PUCCH或物理上行业务信道PUSCH上。
- 一种中继选择及发现的方法,包括:远端终端监听终端发送的中继发现信号,根据所述中继发现信号选择中继终端,并向所述中继终端发送相应的请求消息;其中,所述请求信息用于所述中继终端向基站请求中继传输。
- 根据权利要求9所述的方法,其中,所述远端终端监听终端发送的中继发现信号,根据所述中继发现信号选择中继终端包括以下之一:所述远端终端测量所述远端终端和所述中继终端之间的链路质量,并根据所述链路质量选出满足第二阈值的中继终端;所述远端终端在所述中继终端中随机选择中继终端;所述远端终端选择所述链路质量最好的中继终端。
- 根据权利要求10所述的方法,其中,所述链路质量包括以下至少之一:所述远端终端根据所述中继终端发送的导频或数据符号计算的参考信号 接收功率RSRP;所述远端终端根据所述中继终端发送的导频或数据符号计算的参考信号接收质量RSRQ;所述远端终端根据所述中继终端发送的导频或数据符号计算的信号与干扰加噪声比SINR;所述远端终端根据所述中继终端发送的导频或数据符号计算的路损。
- 根据权利要求10所述的方法,其中,在所述第二阈值包括一个第二下限值的情况下,所述选出满足所述第二阈值的中继终端包括:选择所述中继终端的边链路的链路质量大于所述第二下限值的中继终端。
- 根据权利要求12所述的方法,其中,所述第二下限值包括以下至少之一:协议中预定义的所述第二下限值;网络侧预配置的所述第二下限值;当前***中的门限值。
- 根据权利要求9所述的方法,其中:所述远端终端向中继终端发送的所述请求信息通过发现信道承载;其中,所述请求消息包括以下至少之一:邻近服务中继终端身份标识ID,公共陆地移动网络身份标识ID,身份标识ID类型。
- 一种中继选择及发现的方法,包括:基站根据中继终端的信息为远端终端选择一个中继终端;所述基站将携带有所述中继终端信息的反馈信息发送给所述远端终端。
- 根据权利要求15所述的方法,其中,所述基站根据中继终端的信息为远端终端选择一个中继终端之前,还包括:当所述远端终端位于网络覆盖外时,所述基站接收所述中继终端利用物理上行链路控制信道PUSCH转发的中继终端候选集合和/或边链路的链路状况,所述中继终端候选集合和/或边链路的链路状况是所述远端终端利用发 现信道发送给所述中继终端的;当所述远端终端位于网络覆盖内时,所述基站接收所述远端终端利用物理上行链路控制信道PUSCH发送的中继终端候选集合和/或边链路的链路状况。
- 根据权利要求15所述的方法,其中,所述反馈信息包括以下至少之一:所述远端终端身份标识ID信息,所述中继终端邻近服务身份标识信息。
- 一种中继选择及发现的装置,位于终端侧,包括:测量模块,设置为:测量所述终端和基站之间的链路质量;第一发送模块,设置为:在所述链路质量满足第一阈值的情况下,所述终端充当中继终端发送对应的中继发现信号。
- 一种中继选择及发现的装置,位于远端终端侧,包括:监视模块,设置为:监听终端发送的中继发现信号;第一选择模块,设置为:根据所述中继发现信号选择中继终端,并向所述中继终端发送相应的请求消息,其中,所述请求信息用于所述中继终端向基站请求中继传输。
- 一种中继选择及发现的装置,位于基站侧,包括:第二选择模块,设置为:根据中继终端的信息为远端终端选择一个中继终端;第二发送模块,设置为:将携带有所述中继终端信息的反馈信息发送给所述远端终端。
- 一种中继选择及发现的***,包括:终端,远端终端,中继终端,基站;所述终端设置为:测量所述终端和基站之间的链路质量,其中,所述终端在网络覆盖内;在所述链路质量满足第一阈值的情况下,所述终端充当所述中继终端发送对应的中继发现信号;所述远端终端设置为:监听所述中继发现信号,根据所述中继发现信号选择中继终端,并向所述中继终端发送相应的请求消息,其中,所述请求信息用于所述中继终端向所述基站请求中继传输。
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