WO2016150107A1 - Procédé et appareil pour déterminer l'état de relais d'un système direct de dispositif - Google Patents

Procédé et appareil pour déterminer l'état de relais d'un système direct de dispositif Download PDF

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Publication number
WO2016150107A1
WO2016150107A1 PCT/CN2015/088986 CN2015088986W WO2016150107A1 WO 2016150107 A1 WO2016150107 A1 WO 2016150107A1 CN 2015088986 W CN2015088986 W CN 2015088986W WO 2016150107 A1 WO2016150107 A1 WO 2016150107A1
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WO
WIPO (PCT)
Prior art keywords
relay
remote
information
discovery
state
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PCT/CN2015/088986
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English (en)
Chinese (zh)
Inventor
陈琳
李大鹏
黄莹
罗薇
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中兴通讯股份有限公司
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Publication of WO2016150107A1 publication Critical patent/WO2016150107A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/02—Power saving arrangements
    • 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 wireless communication technology.
  • D2D technology can reduce the burden of cellular networks, reduce the battery power consumption of user equipment, increase the data rate, and improve the robustness of the network infrastructure, which satisfies the requirements of the above high data rate services and proximity services.
  • D2D technology is also called Proximity Services (ProSe), and one-side link (Sidelink, SL).
  • D2D technology can work in licensed or unlicensed bands, allowing multiple D2D-enabled user equipment (D2D User Equipment, D2D UE) to directly discover without network infrastructure or network infrastructure. And / or direct communication.
  • D2D User Equipment D2D User Equipment
  • UE1 and UE2 perform data interaction under the coverage of the cellular network, and the user plane data does not pass through the network infrastructure, as shown in scenario 1 of FIG. 1;
  • the UE 4 with poor signal quality is allowed to communicate with the network through the UE3 with network coverage nearby, which can help the operator to expand coverage, Increase capacity;
  • the D2D technology generally includes a D2D discovery technology and a D2D communication technology, where the D2D discovery technology refers to a technology for determining or determining whether a first user equipment is adjacent to a second user equipment.
  • D2D user equipment can discover each other by transmitting or receiving a discovery signal (discovery information);
  • D2D communication technology refers to a technology in which some or all communication data between D2D user equipments can directly communicate without going through a network infrastructure.
  • the UE3 can communicate with the existing LTE mode on the network side, and can also serve as a relay and coverage (out of The coverage (UE4 in the illustration) communicates using D2D mode, including D2D Discovery and/or D2D communication. If the terminal UE4 that is out of coverage or has a poor signal transmits data to the base station through the terminal UE3 in the coverage, we call UE4 a remote user (Remote UE) and UE3 as a relay user (Relay UE).
  • Remote UE remote user
  • Relay UE relay user
  • UE6 may forward data packets between UE5 and UE7, UE6 may be referred to as a relay user, and UE5 and UE7 may be referred to as remote users.
  • the related art does not provide a system perfect solution for the scenario 2 and scenario 3 relay transmission mode relay state mechanisms.
  • This paper provides a method and apparatus for determining a relay state of a device through system.
  • a method for determining a relay state of a device through system includes:
  • the relay user equipment UE acquires the relay configuration information and/or the receiving device to the device D2D information, and determines the relay state of the relay UE according to the relay configuration information and/or the D2D information.
  • the relaying UE acquires the relay configuration information, including:
  • the relay UE receives the relay configuration information sent by the base station or sent by the short-range service function, or the relay UE acquires the pre-configured relay configuration information;
  • the relay configuration information includes at least one of the following: a relay discovery resource or a resource pool letter Information, relay communication resource or resource pool information, activation indication of relay function, deactivation indication of relay function, relay power saving enable indication, relay power saving prohibition indication, relay active state timer, remote UE activity status timer.
  • the relay discovery resource or resource pool information includes: a relay discovery transmission resource or a resource pool, and a relay discovery reception resource pool; the relay communication resource or resource pool information includes: a relay communication transmission resource or Resource pool, relay communication receives resource pool.
  • the relay discovery transmission resource or the resource pool includes at least one of the following: an overlay D2D discovery transmission resource or a resource pool, and an uncovered D2D discovery transmission resource pool;
  • the relay discovery reception resource pool includes: The D2D discovery receiving resource pool and the uncovered D2D discovery receiving resource pool are included; wherein: the coverage D2D discovery receiving resource pool includes a D2D discovery sending resource pool of the relay UE serving cell, and the neighboring area of the relay UE serving cell D2D discovery sends a resource pool.
  • the relay configuration information further includes one or more of the following: a relay first state listening period, a listening frame offset, a listening subframe offset, and a monitoring duration.
  • the relaying UE determines, according to the relay configuration information, a relay state of the relaying UE, including:
  • the relay configuration information includes: a relay function activation indication, and the relay UE performs a relay function; or
  • the relay configuration information includes: a relay function deactivation indication, and the relay UE no longer performs a relay function; or
  • the relay configuration information includes: a relay power saving enable indication, where the relay UE enters a relay first state according to the relay configuration information; or
  • the relay configuration information includes: a relay power saving prohibition indication, and the relay UE enters a relay second state according to the relay configuration information.
  • the relaying UE determines, according to the relay configuration information and/or the D2D information, a relay state of the relaying UE, including:
  • the relay UE After receiving the D2D information of the discovery relay sent by the remote UE, the relay UE interacts with the remote UE, and after establishing a connection with the remote UE, enters the relay second state.
  • the relay UE after receiving the D2D information of the discovery relay sent by the remote UE, the relay UE interacts with the remote UE, and after establishing a connection with the remote UE, enters the relay second state.
  • the relay UE After receiving the D2D information of the discovery relay sent by the remote UE, the relay UE sends the discovery relay response D2D information to the remote UE, and after receiving the relay connection establishment request sent by the remote UE, Sending relay connection establishment information to the remote UE, where the relay UE enters a relay second state.
  • the relay UE determines, according to the relay configuration information and the D2D information, the relay status of the relay UE, including:
  • the relay UE starts the relay active state timer when entering the relay second state, and when the relay active state timer expires, the relay UE enters the relay first state.
  • the method further includes:
  • the relay UE restarts the relay active state timer when any one of the following events occurs:
  • the relay UE determines, according to the relay configuration information and the D2D information, the relay status of the relay UE, including:
  • the relay UE sets and starts a corresponding active state timer for the remote UE
  • the relay UE When the active state timer of the remote UE expires, the relay UE releases the connection with the remote UE; or when the active state timer of the remote UE expires, the relay UE Transmitting, by the remote UE, D2D information or paging information of the remote UE, if the response information sent by the remote UE is not received within a predetermined time, the relay UE releases the remote terminal UE connection;
  • the relay UE When the relay UE receives the connection release request information sent by the remote UE that has been accessed, the active state timer corresponding to the remote UE is stopped, and the connection with the remote UE is released;
  • the relay UE enters a relay first state after releasing the connection of all the accessed remote UEs.
  • the method further includes:
  • the relaying UE restarts an active state timer corresponding to the remote UE when any one of the following events occurs:
  • the method further includes: the relay UE in the relay first state performs one of the following operations:
  • the method further includes: the relay UE in the relay second state performs one or more of the following operations:
  • the method further includes: after receiving the relay broadcast information sent by the relay UE in the relayed second state, the remote UE that has not accessed the relay UE selects a relay UE, and selects The relay UE sends a relay connection establishment request, and after receiving the relay connection establishment request, the relay UE sends the relay connection establishment information to the remote UE.
  • the method further includes: The relay UE reports the relay status of the relay UE to the base station.
  • a device pass-through system relay state determining device is located at the relay user equipment UE, and includes an information acquiring module and a state determining module, where:
  • the information acquiring module is configured to: acquire relay configuration information and/or receive device to device D2D information;
  • the state determining module is configured to: determine a relay state of the relay UE according to the relay configuration information and/or the D2D information.
  • the information acquiring module is configured to: receive the relay configuration information sent by the base station or sent by the short-range service function, or the information acquiring module acquires the relay configuration information pre-configured by the relay UE.
  • the state determining module determines, according to the relay configuration information, a relay state of the relaying UE, including:
  • the relay configuration information includes: a relay function activation indication, and the status determination module is configured to: perform a relay function; or
  • the relay configuration information includes: a relay function deactivation indication, the status determination module is configured to: no longer perform a relay function; or
  • the relay configuration information includes: a relay power saving enable indication, where the state determining module is configured to: enter a relay first state according to the relay configuration information; or
  • the relay configuration information includes: a relay power saving prohibition indication, and the state determining module is configured to: enter a relay second state according to the relay configuration information.
  • the state determining module is configured to:
  • the remote UE After receiving the D2D information of the discovery relay sent by the remote UE, interacting with the remote UE, and after the relay UE establishes a connection with the remote UE, determining that the relay UE enters the relay Two states.
  • the state determination module is configured to:
  • the terminal UE After receiving the D2D information of the discovery relay sent by the remote UE, sending the discovery relay response D2D information to the remote UE, and after receiving the relay connection establishment request sent by the remote UE, The terminal UE sends the relay connection establishment information, and determines that the relay UE enters the relay second state.
  • the state determination module is configured to:
  • the relay active state timer is started when the relay UE enters the relay second state, and when the relay active state timer expires, determining that the relay UE enters the relay first state.
  • the state determining module is further configured to: after starting the relay active state timer, determine that the relay active state timer is restarted if any one of the following events occurs:
  • the state determination module is configured to:
  • the remote UE accesses the relay UE, setting and starting a corresponding active state timer for the remote UE; when the active state timer of the remote UE expires, notifying the relay UE to release a connection with the remote UE; or when the active state timer of the remote UE expires, sending D2D information or paging information of the remote UE to the remote UE, if received within a predetermined time Notifying the relay UE to release the connection with the remote UE; and receiving the connection release request information sent by the accessed remote UE, stopping the An activity status timer corresponding to the remote UE, notifying the relay UE to release the connection with the remote UE; and determining, after the relay UE releases the connection of all the accessed remote UEs, determining the relay The UE enters the relay first state.
  • the state determining module is further configured to: after setting and starting the corresponding active state timer for the remote UE, determining, if any one of the following events occurs, restarting the activity corresponding to the remote UE Status timer:
  • the state determining module determines that the relay state of the relay UE is a relay first state
  • the device further includes a first module configured to: perform one of the following operations:
  • the state determining module determines that the relay state of the relay UE is a relay second state
  • the device further includes a second module, configured to: perform one or more of the following operations:
  • the second module is further configured to: after receiving the relay connection establishment request sent by the remote UE that has not accessed the relay UE, send the relay connection establishment information to the remote UE.
  • the device further includes a reporting module, configured to: after the state determining module determines the relay state of the relaying UE, report the relay state of the relay UE to the base station.
  • a reporting module configured to: after the state determining module determines the relay state of the relaying UE, report the relay state of the relay UE to the base station.
  • a computer readable storage medium storing computer executable instructions for performing the method of any of the above.
  • the UE with the relay capability can enter the second state of the relay when there is no remote user access, and enter the relay first after receiving the request of the remote user for the relay.
  • Status, periodic broadcast relay information in this way, the relay UE relay state is switched, and the relay UE can achieve the purpose of power saving when it is in the relay second state.
  • FIG. 1 Schematic diagram of device direct/system discovery/communication
  • FIG. 2 is a schematic diagram of a method for determining a relay state of a device through-system according to Embodiment 1 of the present invention
  • FIG. 3 is a schematic diagram of a device for determining a relay state of a device through-system according to Embodiment 2 of the present invention.
  • FIG. 4 is a schematic diagram of a relay state transition of a device through-system according to an embodiment of the present invention.
  • FIG. 7 is a flowchart of an application example 3 relaying UE entering a relay active state from a relay inactive state;
  • FIG. 8 is a flowchart of an application example 4 relaying UE entering a relay active state from a relay inactive state;
  • FIG. 10 is a flowchart of an application example 6 relaying a UE from a relay active state to a relay inactive state;
  • 11 is a flow chart of an application example 7 relaying a UE from a relay active state to a relay inactive state.
  • This embodiment describes a method for determining a relay state of a device through-through system, as shown in FIG. 2, including:
  • Step 10 The relay UE acquires the relay configuration information and/or the receiving device to the device D2D information;
  • the relay UE receives the base station transmission or the ProSe function entity
  • the relay configuration information sent, or the relay UE acquires the pre-configured relay configuration information
  • the relay configuration information includes at least one of the following: a relay discovery resource or resource pool information, a relay communication resource or resource pool information, an activation indication of a relay function, a deactivation indication of a relay function, and a relay power saving Enable indication, relay power saving prohibition indication, relay active status timer, remote UE active status timer.
  • the relay discovery resource or resource pool information includes: a relay discovery transmission resource or a resource pool, and a relay discovery reception resource pool; the relay communication resource or resource pool information includes: a relay communication transmission resource or a resource pool The relay communication receives the resource pool.
  • the relay discovery transmission resource or resource pool includes at least one of the following: an overlay D2D discovery transmission resource or a resource pool, and an overlayless D2D discovery transmission resource pool;
  • the relay discovery reception resource pool includes: coverage D2D discovery reception a resource pool, and a non-overlay D2D discovery receiving resource pool; wherein: the D2D discovery receiving resource pool covering the D2D discovery receiving resource pool includes a D2D discovery sending resource pool of the relay UE serving cell, and the D2D discovery sending resource corresponding to the neighboring area of the relay UE serving cell Pool.
  • the relay configuration information further includes one or more of the following: a relay first state listening period, a listening frame offset, a listening subframe offset, and a monitoring duration.
  • Step 20 Determine a relay state of the relay UE according to the relay configuration information and/or the D2D information.
  • the relay UE reports to the base station that the UE is performing the relay function and/or the relay UE. Following the state.
  • the application determines the relay status of the relay UE according to the relay configuration information, including the following situations:
  • the relay UE performs a relay function
  • the relay UE does not perform a relay function
  • the relaying UE performing the relay function enters the relay first state according to the relay configuration information;
  • the relay UE performing the relay function enters the relay second state according to the relay configuration information.
  • the relay function activation and deactivation indication in the relay configuration information can be indicated by display or implicitly. If the RRC field in the RRC message or the MAC CE is used to explicitly indicate or the UE obtains the relay configuration information, that is, the implicit indication activates the relay function, if the reconfiguration information received by the UE does not include the relay configuration information. , implicitly indicates to deactivate the relay function.
  • the application is an application for the relay UE to enter the relay second state from the relay first state according to the relay configuration information and/or the D2D information, including one of the following situations:
  • the relay UE directly enters the relay second state after receiving the D2D information of the discovery relay sent by the remote UE;
  • the relay UE after receiving the D2D information of the discovery relay sent by the remote UE, the relay UE interacts with the remote UE, and after establishing a connection with the remote UE, enters the relay second state.
  • the relay UE After receiving the D2D information of the discovery relay sent by the remote UE, the relay UE sends the discovery relay response D2D information to the remote UE, and receives the relay connection established by the remote UE. After the request, the relay connection establishment information is sent to the remote UE, and the relay UE enters the relay second state.
  • the application is an application for the relay UE to enter the relay first state from the relay second state according to the relay configuration information and the D2D information, including one of the following situations:
  • the relay UE starts the relay active state timer when entering the relay second state, and when the relay active state timer expires, the relay UE enters the relay first state.
  • the relay UE restarts the relay active state timer: receiving any accessed access a D2D communication information sent by the remote UE to the relay UE; receiving D2D discovery information sent by any remote UE that has been accessed; and the relay UE is directed to any remote UE that has been accessed Send D2D communication information.
  • the relay UE when the remote UE accesses, the relay UE sets and starts a corresponding active state timer for the remote UE; when the active state timer of the remote UE expires, the relay The UE releases the connection with the remote UE; the relay UE may also send the D2D information or the paging information of the remote UE to the remote UE when the active state timer of the remote UE expires, if Receiving the response information sent by the remote UE in the predetermined time, the relay UE releases the connection with the remote UE; and when the relay UE receives the connection release request sent by the accessed remote UE And stopping the active state timer corresponding to the remote UE, releasing the connection with the remote UE; and the relaying UE enters the relay first state after releasing the connection of all the accessed remote UEs .
  • the relay UE restarts the active state timing corresponding to the remote UE.
  • receiving D2D communication information sent by the remote UE to the relay UE receiving D2D discovery information sent by the remote UE; and sending, by the relay UE, D2D communication information to the remote UE.
  • the relay UE in the first state of the relay performs one of the following operations:
  • the remote UE After receiving the D2D information of the discovery relay sent by the remote UE, sending the discovery relay response D2D information to the remote UE; after receiving the relay connection establishment request sent by the remote UE, The remote UE sends relay connection establishment information.
  • the relay UE in the relay second state performs one or more of the following operations:
  • the remote UE that has not accessed the relay UE receives the relay UE that is in the second state of the relay. After the relay broadcast information is sent, a relay UE is selected, and a relay connection establishment request is sent to the selected relay UE, and after receiving the relay connection establishment request, the relay UE sends the relay connection establishment request to the remote UE. Relay connection establishment information.
  • This embodiment describes a device through-system relay state determining device, which is located in the relay user equipment UE, as shown in FIG. 3, and includes an information acquiring module 31 and a state determining module 32, where:
  • the information obtaining module 31 is configured to: acquire relay configuration information and/or receive device to device D2D information;
  • the information acquiring module 31 receives the relay configuration information sent by the base station or the ProSe function, or the information acquiring module 31 acquires the relay configuration information pre-configured by the relay UE.
  • the state determining module 32 is configured to determine a relay state of the relay UE according to the relay configuration information and/or the D2D information.
  • the status determining module 32 determines the relay status of the relay UE according to the relay configuration information, including the following situations:
  • the relay UE performs a relay function
  • the relay UE does not perform a relay function
  • the relaying UE performing the relay function enters the relay first state according to the relay configuration information;
  • the relay UE performing the relay function enters the relay second state according to the relay configuration information.
  • the relay function activation and deactivation indication in the relay configuration information can be indicated by display or implicitly. If the RRC field in the RRC message or the MAC CE is used to explicitly indicate or the UE obtains the relay configuration information, that is, the implicit indication activates the relay function, if the reconfiguration information received by the UE does not include the relay configuration information. , implicitly indicates to deactivate the relay function.
  • the status determining module 32 determines, according to the D2D information, that the relay UE enters the relay second state from the relay first state:
  • the state determining module 32 determines that the relay UE enters the relay second state after receiving the D2D information of the discovery relay sent by the remote UE.
  • the state determining module 32 interacts with the remote UE, and after the relay UE establishes a connection with the remote UE, determines The relay UE enters a relay second state.
  • the state determining module 32 After receiving the D2D information of the discovery relay sent by the remote UE, the state determining module 32 sends the discovery relay response D2D information to the remote UE, and receives the relay connection sent by the remote UE. After the request is established, the relay connection establishment information is sent to the remote UE, and the relay UE is determined to enter the relay second state.
  • the status determining module 32 determines, according to the relay configuration information and the D2D information, that the relay UE enters the relay first state from the relay second state:
  • the state determining module 32 starts the relay active state timer when the relay UE enters the relay second state, and determines the relay UE when the relay active state timer expires. Enter the first state of the relay.
  • the state determining module 32 is further configured to: after starting the relay active state timer, determine to restart the relay active state timing if any one of the following events occurs Receive: receiving D2D communication information sent by any remote UE that has been accessed to the relay UE; receiving D2D discovery information sent by any remote UE that has been accessed; the relay UE is connected Any one of the incoming remote UEs transmits D2D communication information.
  • the state determining module 32 sets and starts a corresponding active state timer for the remote UE when the remote UE accesses the relay UE; when the active state timer of the remote UE exceeds Notifying the relay UE to release the connection with the remote UE; the relay UE may also send the D2D information of the remote UE to the remote UE when the active state timer of the remote UE expires Is the paging information, if the response information sent by the remote UE is not received within the predetermined time, the relay UE releases the connection with the remote UE; when the state determining module 32 receives the accessed Stopping the connection release request information sent by the remote UE, stopping the active state timer corresponding to the remote UE, notifying the relay UE to release the connection with the remote UE; releasing all connected in the relay UE After the connection of the incoming remote UE, the state determining module 32 determines that the relay UE enters the relay first state.
  • the state determining module 32 is further configured to: after setting and starting the corresponding active state timer for the remote UE, determining, if any one of the following events occurs, restarting the corresponding remote UE Active state timer: receiving D2D communication information sent by the remote UE to the relay UE; receiving D2D discovery information sent by the remote UE; and sending, by the relay UE, D2D communication information to the remote UE .
  • the state determining module 32 determines that the relay state of the relay UE is a relay first state
  • the apparatus further includes a first module, configured to: perform one of the following operations:
  • the first module After the first module receives the D2D information of the discovery relay sent by the remote UE, the first module sends the discovery relay response D2D information to the remote UE; the first module receives the sent by the remote UE. After the relay connection establishment request, the relay connection establishment information is sent to the remote UE.
  • the state determining module 32 determines that the relay state of the relay UE is a relay second state
  • the device further includes a second module, configured to: perform one or more of the following operations Kind:
  • the second module is further configured to: after receiving the relay connection establishment request sent by the remote UE that has not accessed the relay UE, send the relay connection establishment information to the remote UE.
  • the apparatus further includes a reporting module, configured to report the relay status of the relay UE to the base station after the status determining module 32 determines the relay status of the relay UE.
  • the relay first state is referred to as a relay inactive state
  • the relay second state is referred to as a relay active state.
  • the relay-capable UE can enter the inactive state when there is no remote user access. After receiving the D2D information of the discovery relay sent by the remote user, the UE enters the relay active state and periodically broadcasts the relay information. Thereby, the purpose of relaying the UE power saving can be achieved.
  • the relay UE can be in two states: a relay active state and a relay inactive state. As shown in FIG. 4, when there is no remote UE around, the relay UE enters a relay inactive state. In the relay inactive state, the relay UE wakes up only periodically and monitors whether the relay finds the received resource.
  • the D2D information of the discovery relay sent by the remote UE (for example, looking for a relay request message), if any, the relay UE sends the discovery relay response D2D information to the remote UE.
  • the relay UE waits for the connection establishment request sent by the remote UE, if the message is received, the relay UE sends a connection establishment message to the remote end. The UE, thereby establishing a connection with the remote UE.
  • the relay UE enters the relay active state.
  • the relay UE may also enter the relay active state immediately after receiving the D2D information that the remote UE sends the discovery relay.
  • the relay UE can periodically broadcast the relay information while forwarding the data packet of the remote UE, and wait for more remote UEs to access the message after hearing the message.
  • the relay UE may maintain a relay active state timer, when the relay UE forwards the data packet for the remote UE or receives the access request sent by the remote UE or the remote UE that has accessed the relay UE.
  • the timer is restarted. If the timer expires, the relay UE considers that the accessed remote UE is in an inactive state. Therefore, the relay UE may initiate release of the connection with the remote UE, and enter the medium. Following the inactive state.
  • the relay UE may also set an active state timer for each accessed remote UE, each time receiving a data packet or a discovery message from the remote UE, or sending a data packet to the remote UE.
  • the active state timer corresponding to the remote UE is restarted.
  • the relay UE releases the context of the locally saved remote UE.
  • the relaying UE may also send the D2D information or the paging information of the remote UE to the remote UE when the active state timer of the remote UE expires, if the remote UE does not receive the received message within the predetermined time. In response to the message, the relay UE releases the connection with the remote UE.
  • the relay UE may also receive the connection release information sent by the remote UE. After receiving the message, the relay UE resets the active state timer corresponding to the remote UE, and releases the context of the remote UE.
  • the relay UE may go to a low-priority remote UE that can be preempted by the resource. Proactively requesting a message to release the connection.
  • the relay UE releases the PC5 connection of all the remote UEs, the relay UE returns to the relay inactive state, and does not periodically send the relay message and listen to the relay data receiving resource. At this time, only the periodic monitoring is performed. Whether there is D2D information of the discovery relay sent by the remote UE.
  • the relay power saving method and related signaling procedures are given below through application examples.
  • UE1 is in network coverage and UE2 is in network coverage.
  • This example describes a base station (eNB) configuring a relay node to make The process of saving electricity.
  • the UE1 in the network coverage is interested in becoming a relay node, and provides a relay service for the UE without coverage.
  • UE1 is interested in becoming a UE-to-network relay. As shown in Figure 5, the following steps are included:
  • Step 501 The UE1 may send the D2D relay information to the base station, where the indication of the interest of the relay and the current location information of the UE are included.
  • Step 502 The base station receives the D2D relay information sent by the UE1 and selects the UE1 as the relay node, and the base station sends the relay configuration information to the UE1.
  • the UE-to-network relay (UE to network relay) configuration is established. information;
  • the relay configuration information may include one or more of the following information: a relay discovery resource or resource pool information, a relay communication resource or resource pool information, an activation indication of a relay function, and a deactivation indication of the relay function, Following the power saving enable indication, the relay power saving prohibition indication, the relay active state timer, the remote UE active state timer, and the like.
  • the relay configuration information includes at least an activation indication of the relay function and a relay power saving enable indication.
  • the relay communication resource or resource pool information is used to relay communication between the UE and the remote UE, including relay communication transmission resource or resource pool information, and relay communication reception resource pool information.
  • the relay discovery resource or resource pool information is used to relay the UE to discover the remote UE, including the relay discovery transmission resource or resource pool information, and the relay discovery reception resource pool information.
  • the relay discovery transmission resource or the resource pool information includes the coverage D2D discovery transmission resource or the resource pool information, and/or the uncovered D2D discovery transmission resource pool information, and the relay discovery reception resource pool information includes the coverage D2D discovery reception resource. Pool information and uncovered D2D discovery receive resource pool information.
  • the D2D discovery receiving resource pool information includes a D2D discovery transmission resource of a relay UE service or a camping cell, and a D2D discovery transmission resource corresponding to a neighboring cell of the relay UE service or the camping cell.
  • the UE 1 may also receive the relay resource pool configuration information from the base station broadcast message.
  • the UE1 may also receive relay configuration information received from the ProSe function (a short-range service function, a network element entity for D2D configuration, authorization authentication, located in the core network) or UE1 pre-configured relay configuration information.
  • ProSe function a short-range service function, a network element entity for D2D configuration, authorization authentication, located in the core network
  • Step 503 After receiving the relay configuration information of the activated relay function, the UE1 starts the relay function, and if the configuration information indicates that the relay power saving is enabled, the UE1 enters the relay inactive state.
  • UE1 and UE2 are within D2D communication range of each other, UE2 and UE3 are within D2D communication range of each other, and UE1 and UE3 are not within D2D communication range of each other.
  • This example describes the flow of a base station configuring a relay node to enable power saving. Assume that the base station configures UE2 to be a UE-to-UE relay. As shown in FIG. 6, the method includes the following steps:
  • Step 601 The base station sends the relay configuration information to the UE2.
  • the UE-to-UE relay (UE to UE relay) configuration information is configured.
  • the relay configuration information may include one or more of the following information: a relay discovery resource or resource pool information, a relay communication resource or resource pool information, an activation indication of a relay function, and a deactivation indication of the relay function, Following the power saving enable indication, the relay power saving prohibition indication, the relay active state timer, the remote UE active state timer, and the like.
  • the relay configuration information includes at least an activation indication of the relay function and a relay power saving prohibition indication.
  • the relay communication resource or resource pool information is used to relay communication between the UE and the remote UE, including relay communication transmission resource or resource pool information, and relay communication reception resource pool information.
  • the relay discovery resource or resource pool information is used to relay the discovery of the UE and the remote UE, including the relay discovery transmission resource or resource pool, and the relay discovery reception resource pool information.
  • the relay discovery transmission resource or resource pool information includes coverage D2D discovery transmission resource or resource pool information, and/or no coverage D2D discovery transmission resource pool information
  • the relay discovery reception resource pool information includes coverage D2D discovery reception resource pool information. And no coverage D2D discovery receiving resource pool information.
  • the D2D discovery receiving resource pool including the D2D discovery receiving resource pool information includes a D2D discovery sending resource pool of the relay UE serving cell (or the camping cell) and a D2D discovery sending resource pool corresponding to the neighboring area of the relay UE serving cell.
  • the UE 2 may also receive relay resource pool configuration information from the base station broadcast message.
  • UE2 may also receive relay configuration information received from the ProSe function or UE2 pre-configured relay configuration information.
  • Step 602 After receiving the relay configuration information, the UE2 enters a relay active state if the configuration information indicates that the relay function is activated and the relay power saving is prohibited.
  • UE1 is in network coverage and UE2 is in network coverage.
  • This example describes the flow of a relay UE entering a relay active state from a relay inactive state.
  • UE1 in network coverage is interested in becoming a relay node, providing relay services for uncovered UEs. Assuming that the base station selects UE1 as a relay node, as shown in FIG. 7, the following steps are included:
  • Step 701 The base station sends the device direct relay configuration information to the UE1. After the UE1 receives the relay configuration information, if the configuration information indicates that the relay function is activated and the relay power saving is enabled, the UE1 performs the relay function and enters the relay non- Active status;
  • Step 702 The relay UE1 monitors the remote UE to send the D2D information of the discovery relay on the relay discovery receiving resource pool.
  • the relay UE1 detects the D2D discovery information sent by the remote UE on the receiving resource pool according to the relay inactive state listening period, the monitoring frame and/or the subframe offset, the monitoring duration, and the like. On the subframe corresponding to the non-relay discovery receiving resource pool, UE1 does not need to listen to the corresponding subframe.
  • Step 703 The remote UE2 sends the D2D information of the discovery relay.
  • the remote UE2 in the uncovered state wants to find the relay UE to connect to the network transmission information, and the UE2 first listens to the relay discovery reception resource pool, and determines whether there is D2D relay broadcast information sent by the relay UE in the vicinity. If the relay broadcast information sent by the relay UE can be received, the remote UE2 selects one relay UE and sends a relay connection establishment request to the selected relay UE. It is assumed that the UE2 does not receive the relay broadcast information sent by the relay UE at this time, and the remote UE2 sends the D2D information of the discovery relay.
  • the D2D information of the discovery relay sent by the remote UE2 may include part or all of the following: a discovery relay indication, an identifier of the remote UE, a type of the remote UE, a relay type sought by the remote UE, and a remote UE.
  • Step 704 the relay UE1 receives the D2D information that the remote UE2 sends the discovery relay, and roots According to the content of the message, it is determined that the UE2 is looking for a relay UE, and the UE1 enters a relay active state;
  • Step 705 The relay UE1 uses the relay to discover the transmission resource or randomly sends the resource from the relay discovery transmission resource pool to send the relay response D2D information to the remote UE2.
  • the relay response D2D information may include part or all of the following content: a relay identifier, a relay type, a relay service cell identifier, a relay available time period, a relay belonging group identifier, a relay mobile status indication, a relay PLMN information, Relay prohibition status indication, etc.
  • step 706 the UE2 receives the relay response D2D information sent by the relay UE1, and the UE2 sends a relay connection establishment request to the relay UE1, and the relay UE1 receives the relay connection establishment request sent by the remote UE2, and the relay UE1 sends the relay connection request.
  • the remote UE2 sends the relay connection establishment information, and the UE2 accesses the relay UE1.
  • the UE2 If the UE2 receives the relay response D2D information sent by the multiple relay UEs at the same time, the UE2 selects one relay UE and sends a relay connection establishment request to the selected relay UE.
  • the relay UE1 can receive the D2D communication information sent by the UE2 on the relay communication receiving resource pool, and use the relay communication to send the resource or randomly send the resource pool from the relay communication to send the resource to the remote UE2. D2D communication information.
  • the relay UE1 may also receive D2D discovery information sent by the accessed UE, connection establishment request information sent by other remote UEs that have not been accessed, and D2D information of the discovery relay UE.
  • the D2D discovery information that is sent by the remote UE that has accessed the relay UE1 includes some or all of the following information: the remote UE identifier, the type of the remote UE, and the far-end UE. Communication group identification, etc.
  • the content of the D2D information for the remote UE that is looking for the relay UE to transmit the discovery relay is as described in step 703.
  • the UE1 in the relay active state may use the relay to discover the transmission resource or periodically send the relay broadcast information from the relay discovery transmission resource pool to randomly select the resource.
  • the relay broadcast information may include a relay identifier, a relay type, a relay service cell identifier, a relay available period, a relay belonging group identifier, a relay mobile status indication, a relay PLMN information, a relay prohibition status indication, and the like.
  • UE1 is in network coverage Cover status, while UE2 is in no network coverage.
  • This example describes another flow in which a relay UE enters a relay active state from a relay inactive state.
  • UE1 in network coverage is interested in becoming a relay node, providing relay services for uncovered UEs. As shown in Figure 8, the following steps are included:
  • Step 801 The base station selects the UE1 as the relay node, and the base station sends the device direct relay configuration information to the UE1. After the UE1 receives the relay configuration information, if the configuration information indicates that the relay power saving is enabled, the UE1 enters the relay inactive. status;
  • Step 802 The relay UE1 receives, on the relay discovery and receiving resource pool, the D2D information that the remote UE sends the discovery relay.
  • the relay UE1 may further detect, according to the relay configuration information, the relay inactive state monitoring period, the monitoring frame/subframe offset, the monitoring duration, and the like, and the remote monitoring UE sends the discovery relay D2D on the receiving resource pool. information.
  • Step 803 The remote UE2 sends the D2D information of the discovery relay.
  • the UE2 in the no-coverage state wants to find the relay UE to connect to the network transmission information, and the UE2 first listens to the relay discovery reception resource pool, and determines whether there is D2D relay broadcast information sent by the relay UE in the vicinity. If the D2D relay broadcast information sent by the relay UE can be received, the remote UE2 selects one relay UE and sends a relay connection establishment request to the selected relay UE. It is assumed that the UE2 does not receive the D2D relay broadcast information sent by the relay UE at this time, and the remote UE2 sends the D2D information of the discovery relay.
  • the D2D information of the discovery relay sent by the remote UE2 includes part or all of the following content: the identifier of the remote UE, the type of the remote UE, the type of the relay sought by the remote UE, and the communication of the remote UE.
  • Step 804 The relay UE1 receives the D2D information that the remote UE2 sends the discovery relay, and determines that the UE2 is looking for the relay UE according to the content of the message, and the relay UE1 uses the relay to discover the transmission resource or randomly selects the transmission resource pool from the relay.
  • the resource sends the relay response D2D information to the remote UE2;
  • the relay response D2D information may include part or all of the following content: a relay identifier, a relay type, a relay service cell identifier, a relay available time period, a relay belonging group identifier, and a relay mobile status finger. Display, relay PLMN information, relay prohibition status indication, and the like.
  • Step 805 The UE2 receives the relay response D2D information sent by the relay UE1, and sends a relay connection establishment request to the relay UE1.
  • the UE2 If the UE2 receives the relay response D2D information sent by the multiple relay UEs at the same time, the UE2 selects one relay UE and sends a relay connection establishment request to the selected relay UE.
  • Step 806 the relay UE1 receives the relay connection establishment request sent by the remote UE2, and the relay UE1 sends the relay connection establishment information to the remote UE2.
  • Step 807 the UE2 accesses the relay UE1, and the relay UE1 enters a relay active state.
  • step 808 the relay UE1 and the remote UE2 can forward data to each other.
  • the relay UE1 may subsequently receive the D2D communication information sent by the UE2 on the relay communication receiving resource pool, use the relay communication to send the resource, or send the D2D communication information to the remote UE2 from the relay communication transmission resource pool randomly selected resource.
  • the relay UE1 may also receive D2D discovery information sent by the accessed UE, connection establishment request information sent by other remote UEs that have not been accessed, and D2D information of the discovery relay.
  • the UE1 in the relay active state may periodically transmit the D2D relay broadcast information by using the relay discovery transmission resource or randomly selecting the resource from the relay discovery transmission resource pool.
  • the D2D relay broadcast information may include part or all of the following contents: a relay identifier, a relay type, a relay service cell identifier, a relay available time period, a relay belonging group identifier, a relay mobile status indication, and a relay PLMN information. Relay prohibition status indication, etc.
  • the UE1 in the relay active state may periodically send the D2D relay broadcast information by using the relay discovery transmission resource or randomly selecting the resource from the relay discovery transmission resource pool.
  • the D2D relay broadcast information may include a relay identifier, a relay type, a relay service cell identifier, a relay available time period, The group ID of the relay belongs to the relay, the relay status indication, the relay PLMN information, the relay prohibit status indication, and the like.
  • the UE2 in the uncovered state wants to find the relay UE to connect to the network transmission information, and then the UE2 first monitors the relay discovery reception resource pool, and determines whether there is a D2D relay broadcast information sent by the relay UE in the vicinity, and the UE2 receives the message at this time.
  • the relay UE1 transmits the D2D relay broadcast information, and the remote UE2 sends a relay connection establishment request to the relay UE1.
  • the relay UE1 receives the relay connection establishment request sent by the remote UE2, and the relay UE1 sends the relay connection establishment information to the remote UE2 to establish a connection with the UE2.
  • Step 902 When the UE2 accesses, the UE1 starts an active state timer corresponding to the remote UE2.
  • Step 903 The relay UE1 determines whether any one of the following events occurs, if yes, step 904 is performed, otherwise step 907 is performed: receiving D2D communication information sent by the remote UE2 on the relay communication receiving resource pool; using relay communication The D2D communication information is sent to the remote UE2 by sending resources or randomly selecting resources from the relay communication resource pool; and the D2D discovery information sent by the remote UE2 is received.
  • Step 904 it is determined whether the received message is the connection release request information sent by the remote UE2, if yes, step 906 is performed, otherwise step 905 is performed;
  • Step 905 the relay UE1 restarts the active state timer of the remote UE2, and returns to step 903;
  • the relay UE1 receives the D2D communication information sent by the remote UE2, or the relay UE1 sends the D2D communication information to the remote UE2, or the relay UE1 receives the D2D discovery information sent by the remote UE2, and triggers the relay UE1 to restart.
  • Remote UE2 active state timer Remote UE2 active state timer.
  • Step 906 if the UE1 receives the connection release request information sent by the UE2, the UE1 sends the connection release information to the UE2, and step 8 is performed;
  • Step 907 it is determined whether the remote UE2 active state timer expires, and if so, step 908 is performed, otherwise returns to step 903;
  • step 908 the UE1 releases the connection with the remote UE2 and the context of the saved UE2.
  • the relay UE1 may send the D2D information or the paging information of the remote UE2 to the remote UE2 when the active state timer of the remote UE2 times out, if the response sent by the remote UE2 is not received within the predetermined time. Information, the relay UE1 releases the connection with the remote UE2.
  • UE1, UE2, and UE3 with D2D functions, respectively.
  • UE1 is in a network coverage state, and UE2 and UE3 are in no network coverage.
  • This example describes a procedure for relaying a UE from a relay active state to a relay inactive state.
  • the relay UE1 sets an active state timer for each remote UE, as shown in FIG. 10, including the following steps:
  • Step 1001 The base station selects UE1 as a relay node, enables relay power saving, and relays UE1 to enter a relay active state.
  • Step 1002 At this time, UE2 and UE3 in the uncovered state have accessed the relay UE1, and when the UE2 and the UE3 access, the relay UE1 starts an active state timer corresponding to the UE2 and the UE3, respectively.
  • the relay UE1 may use the method in the example 5 (steps 903-907 in the example 5) to determine whether it is necessary to release the connection with the UE2, and determine whether the connection with the UE3 needs to be released. If yes, go to step 1004, otherwise return This step;
  • step 1004 the relay UE1 successively releases the connection with the UE2 and the UE3, and the UE1 enters the relay inactive state.
  • UE1, UE2, and UE3 use UE1, UE2, and UE3 with D2D functions, respectively.
  • UE1 is in a network coverage state, while UE2 and UE3 are in no network coverage.
  • This example describes the flow of relaying a UE from a relay active state to a relay inactive state.
  • the relay UE1 maintains its own relay active state timer, as shown in FIG. 11, including the following steps:
  • Step 1101 the base station selects the UE1 as the relay node, and sends the relay configuration information thereto. After the UE1 receives the relay configuration information, if the configuration information indicates that the relay function is activated and the relay power saving is enabled, the UE1 enters the relay non- Active status;
  • Step 1102 The relay UE1 monitors the D2D discovery information sent by the remote UE on the relay discovery receiving resource pool, and the relay UE1 receives the D2D discovery information sent by the remote UE2, and determines that the UE2 is looking for the relay UE according to the message content. UE1 enters the relay active state and starts the relay activity. Dynamic state timer
  • the relay UE1 establishes a connection with the remote UE2 and the UE3 and forwards data for the same.
  • the relay UE1 determines whether any of the following events occur. If yes, step 1104 is performed; otherwise, step 1105 is performed: the relay UE1 is in the middle.
  • the D2D communication information sent by the UE2 or the UE3 is received on the communication receiving resource pool; the relay UE1 transmits the resource by using the relay communication or randomly transmits the resource pool from the relay communication to send the D2D communication information to the remote UE2 or the UE3; the relay UE1 receives D2D discovery information sent to UE2 or UE3;
  • Step 1104 the relay UE1 restarts the relay active state timer, and returns to step 1103;
  • Step 1105 the relay UE1 determines whether the relay active state timer maintained by it is timed out, if yes, step 1106 is performed, otherwise returns to step 1103;
  • step 1106 the relay UE1 enters the relay inactive state again, and only listens to the D2D discovery information of the looking relay UE sent by the remote UE on the relay discovery receiving resource pool.
  • UE1 is in network coverage and UE2 is in network coverage.
  • UE1 in network coverage is interested in becoming a relay node, providing relay services for uncovered UEs.
  • the UE1 activates the relay function according to the pre-configured relay configuration information, and enables the power saving.
  • the UE1 enters the relay inactive state, and starts to receive the discovery relay D2D information sent by the remote UE on the relay discovery receiving resource pool.
  • UE1 may send a relay status indication to the serving base station of UE1 after entering the relay inactive state, wherein the relay status indication may further indicate a relay inactive status.
  • the relay UE1 receives the discovery relay D2D information sent by the remote UE2, and judges that the UE2 is looking for the relay UE according to the message content, the UE1 enters the relay active state. Similarly, after entering the relay active state, the UE1 may enter the relay active state.
  • a relay status indication is sent to the serving base station of UE1, wherein the relay status indication may further indicate a relay active status.
  • the UE1 may also send a relay status indication to the serving base station of the UE1, wherein the relay status indicates that the UE1 is no longer acting as a relay node.
  • all or part of the steps of the above embodiments may also be implemented by using an integrated circuit. These steps may be separately fabricated into individual integrated circuit modules, or multiple modules or steps may be fabricated into a single integrated circuit module. achieve.
  • the devices/function modules/functional units in the above embodiments may be implemented by a general-purpose computing device, which may be centralized on a single computing device or distributed over a network of multiple computing devices.
  • the device/function module/functional unit in the above embodiment When the device/function module/functional unit in the above embodiment is implemented in the form of a software function module and sold or used as a stand-alone product, it can be stored in a computer readable storage medium.
  • the above mentioned computer readable storage medium may be a read only memory, a magnetic disk or an optical disk or the like.
  • the UE with the relay capability can enter the second state of the relay when there is no remote user access, and enter the relay first after receiving the request of the remote user for the relay.
  • Status, periodic broadcast relay information in this way, the relay UE relay state is switched, and the relay UE can achieve the purpose of power saving when it is in the relay second state.

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Abstract

La présente invention concerne un procédé et un appareil pour déterminer un état de relais d'un système direct de dispositif. Le procédé comprend les étapes suivantes : un équipement d'utilisateur de relais (UE) acquiert des informations de configuration de relais et/ou reçoit des informations de dispositif à dispositif (D2D) ; et déterminer un état de relais de l'UE de relais en fonction des informations de configuration de relais et/ou des informations de D2D. L'appareil se trouve dans un équipement d'utilisateur de relais (UE) et comprend un module d'acquisition d'informations et un module de détermination d'état.
PCT/CN2015/088986 2015-03-25 2015-09-06 Procédé et appareil pour déterminer l'état de relais d'un système direct de dispositif WO2016150107A1 (fr)

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