WO2013044855A1 - Procédé, dispositif et système d'établissement d'une connexion avec un terminal d2d - Google Patents

Procédé, dispositif et système d'établissement d'une connexion avec un terminal d2d Download PDF

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Publication number
WO2013044855A1
WO2013044855A1 PCT/CN2012/082341 CN2012082341W WO2013044855A1 WO 2013044855 A1 WO2013044855 A1 WO 2013044855A1 CN 2012082341 W CN2012082341 W CN 2012082341W WO 2013044855 A1 WO2013044855 A1 WO 2013044855A1
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WIPO (PCT)
Prior art keywords
base station
configuration parameter
link configuration
value
rrc connection
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PCT/CN2012/082341
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English (en)
Chinese (zh)
Inventor
常俊仁
冯淑兰
时洁
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华为技术有限公司
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Publication of WO2013044855A1 publication Critical patent/WO2013044855A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H04W76/14—Direct-mode setup
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/08—Non-scheduled access, e.g. ALOHA
    • H04W74/0833—Random access procedures, e.g. with 4-step access

Definitions

  • the present invention relates to communication technologies, and in particular, to a method, device and system for establishing a connection of a device to device (D2D) terminal.
  • D2D device to device
  • a user equipment when a user equipment (UE) is to communicate with other user equipments, it is usually required to perform centralized control by the base station.
  • an evolved base station (Evolved Node B, eNB) in the LTE network controls both sides of the call.
  • a signal connection process such as call setup between UEs.
  • the advantage of the inter-user communication link being coordinated by the base station is that the base station can centrally manage the use of radio resources in the small area, so that the radio resources can be allocated reasonably and effectively, and the wireless interference between users can be well avoided.
  • the distance between the two user equipments is relatively close, if communication is still performed through the base station, wireless resources are wasted.
  • D2D communication can save half of the wireless resources when transmitting the same amount of data.
  • D2D communication is direct communication between terminals, so information transmitted between terminals of D2D communication does not need to pass through the base station.
  • the UE in the idle mode when the UE in the idle mode receives the paging message sent by the network side, it first needs to go through a random access (RA) process to obtain the uplink synchronization time advance.
  • RA random access
  • a Timing Advance (TA) value and/or a suitable transmit power value can be used to establish a connection with the network to transmit user data.
  • FIG. 1 shows a signaling diagram of a connection establishment between a UE and an eNB in the prior art.
  • Step 11 the first UE sends a preamble (Preamble) to the eNB;
  • Step 12 The eNB returns a random access response message (RA response message) to the first UE, where the response message includes an uplink synchronization TA value and a suitable transmission power.
  • RA response message random access response message
  • Step 13 The first UE sends an RRC connection setup request message to the eNB according to the foregoing transmit power.
  • Step 16 The first UE sends an RRC connection setup complete message to the eNB.
  • the UEs have nearly the same TA and/or transmission power, so when the eNB calls the called UE's second UE to perform D2D data transmission, if the base station further follows the FIG.
  • the communication method establishes a connection with the second UE, which causes the called UE to perform an unnecessary random access procedure, thereby increasing the delay of connection establishment.
  • a method, an apparatus, and a system for establishing a connection for a D2D terminal are provided, which can solve the problem that the called user terminal performs an unnecessary random access process when performing D2D communication in a UE that is closer in the prior art.
  • the problem of increased latency is provided.
  • the embodiment of the present invention provides the following technical solutions:
  • the embodiment of the present invention provides a device-to-device D2D terminal connection establishment method, including: a first user equipment UE sends a preamble preamble to the base station; and a first UE receives the base station in response to the preamble Sending a random access response message; the first UE sends a second UE identifier to the base station, the second UE is a D2D communication target of the first UE; and the first UE receives the base station in response to the second UE identifier a D2D link configuration parameter of the first UE and an RRC connection configuration parameter; the first UE establishes a D2D connection with the second UE based on the D2D link configuration parameter of the first UE, and completes based on the RRC connection configuration parameter The RRC connection with the base station is established.
  • the embodiment of the present invention provides a device-to-device D2D terminal connection establishment method, including: the second user equipment UE receives a paging message from the base station from the base station, and acquires the second UE based on the paging message.
  • the embodiment of the present invention provides a device-to-device D2D terminal connection establishment method, including: the second user equipment UE receives the D2D link configuration parameter and the RRC of the second UE that is forwarded by the first UE and is forwarded by the first UE. Connecting the configuration parameter; the second UE establishes a D2D connection with the first UE based on the D2D link configuration parameter of the second UE, and completes an RRC connection establishment with the base station based on the RRC connection configuration parameter.
  • the embodiment of the present invention provides a method for establishing a connection of a device to a device D2D terminal, including: receiving a preamble preamble from a first UE; and sending a random access response message to the first UE in response to the preamble; Receiving, by the first user equipment UE, the second UE identifier; The second UE identifier sends the D2D link configuration parameter of the first UE to the first UE, and the D2D link configuration parameter of the first UE is used for the D2D connection of the first UE and the second UE.
  • the embodiment of the present invention provides a first user equipment UE, including: a first sending device, configured to send a preamble preamble to a base station, and configured to send a second UE identifier to the base station, where the The second UE is a D2D communication target of the first UE, and the first receiving device is configured to receive a random access response message sent by the base station in response to the preamble, and to receive, by the base station, the returned by the base station in response to the second UE identifier.
  • a D2D link configuration parameter of the first UE and an RRC connection configuration parameter a D2D link configuration parameter of the first UE and an RRC connection configuration parameter
  • a first connection establishing means configured to establish a D2D connection with the second UE based on the D2D link configuration parameter of the first UE, and based on the The RRC connection configuration parameter completes the establishment of an RRC connection with the base station.
  • the embodiment of the present invention provides a second user equipment UE, including: a second receiving apparatus, configured to receive a paging message from a base station from a base station, and acquire a D2D of the second UE based on the paging message. a link configuration parameter, configured to establish a D2D connection with the first UE based on the D2D link configuration parameter of the second UE.
  • an embodiment of the present invention provides a second user equipment, including: a third receiving apparatus, configured to receive D2D link configuration parameters and RRC connection configuration parameters of a second UE that is forwarded by the first UE and sent by the first UE. And a third connection establishing apparatus, configured to establish a D2D connection with the first UE according to the D2D link configuration parameter of the second UE, and complete an RRC connection establishment with the base station according to the RRC connection configuration parameter.
  • the embodiment of the present invention provides a base station, including: a fourth receiving apparatus, configured to receive a preamble preamble from a first UE, and to receive a second UE identifier from a first user equipment UE;
  • the device is configured to send, according to the preamble, a random access response message to the first UE, and to send, according to the second UE identifier, a D2D link configuration parameter of the first UE to the first UE, the first UE
  • the D2D link configuration parameter is used for the D2D connection of the first UE and the second UE.
  • an embodiment of the present invention provides a communication system, including the foregoing first user equipment, second user equipment, and a base station.
  • the embodiment of the present invention only the process of random access between the calling user equipment and the base station is required, and the random access procedure is not required to be repeated between the called user equipment and the base station, thereby reducing the delay of establishing the D2D connection.
  • the embodiment of the invention can also avoid the impact of the paging process on the core network, and further reduce the D2D connection. The delay established.
  • FIG. 1 is a signaling diagram of establishing a connection between a UE and an eNB in the prior art
  • FIG. 2 is a schematic flow chart showing a method for establishing a connection of a D2D terminal according to an embodiment of the present invention
  • FIG. 3 is a schematic flowchart of a method for establishing a connection of a D2D terminal according to another embodiment of the present invention.
  • FIG. 4 is a schematic structural diagram of a first UE according to an embodiment of the present invention
  • FIG. 5 is a schematic structural diagram of a second UE according to an embodiment of the present invention
  • FIG. 7 shows a schematic structural diagram of a base station according to an embodiment of the present invention.
  • Fig. 2 is a schematic flow chart showing a method of establishing a connection of a D2D terminal according to an embodiment of the present invention.
  • the first UE of the calling user equipment needs to establish a D2D connection with the second UE of the called user equipment, and the following steps are performed:
  • Step 201 The first user equipment UE sends a preamble preamble to the base station;
  • Step 202 The base station sends a random access response RA response message to the first UE after receiving the preamble sent by the first UE, where the first UE receives the random access response message sent by the base station in response to the preamble.
  • the time advance TA value and/or the transmit power value for the first UE may be carried in the message for the first UE to access the base station for use.
  • Step 203 The first UE sends a second UE identifier to the base station, where the second UE is a D2D communication target of the first UE, that is, the first UE establishes D2D communication with the second UE.
  • Second UE The knowledge may for example be a Temporary Mobile Subscriber Identity (S-TMSI) of the second UE or other identity.
  • S-TMSI Temporary Mobile Subscriber Identity
  • the first UE may acquire the identifier of the second UE by detecting the second UE, and may also use the user number of the second UE.
  • the first UE may send an RRC connection setup request message to the base station, where the RRC connection setup request message carries the second UE identifier.
  • Step 204 The base station sends the D2D link configuration parameter and the RRC connection configuration parameter of the first UE to the first UE in response to the second UE identifier, where the first UE receives the base station and returns according to the second UE identifier.
  • the D2D link configuration parameter of the first UE and the RRC connection configuration parameter wherein the D2D link configuration parameter is used for a D2D connection between the first UE and the second UE.
  • the D2D link configuration parameters and the RRC connection configuration parameters include a Packet Data Convergence Protocol (PDCP) layer, a Radio Link Control (RLC) layer, a Medium Access Control (MAC) layer, and a physical (PHY) layer. Static or semi-static parameter configuration.
  • PDCP Packet Data Convergence Protocol
  • RLC Radio Link Control
  • MAC Medium Access Control
  • PHY physical
  • the eNB may send an RRC connection setup message to the first UE, where the RRC connection setup message carries the D2D link configuration parameter of the first UE that is returned by the base station in response to the second UE identifier. It is also possible that the base station sends the D2D link configuration parameter of the first UE and the scheduling of the RRC connection configuration parameter to the first UE by using a D2D-Cell Radio Network Temporary Identity (D2D-C-RNTI) scrambled physical downlink control channel (PDCCH).
  • D2D-C-RNTI D2D-Cell Radio Network Temporary Identity
  • the information so that the first UE uses the D2D-C-RNTI to descramble the physical downlink control channel PDCCH, acquires the D2D link configuration parameter of the first UE and the scheduling information of the RRC connection configuration parameter, and further acquires the information according to the scheduling information.
  • the D2D link configuration parameter and the RRC connection configuration parameter of the first UE are described. It should be noted that, in the case that the scheduling information is transmitted by using the D2D-C-RNTI, the first UE needs to first acquire the D2D-C-RNTI allocated by the base station.
  • the first UE may obtain the D2D-C-RNTI by using the RA response message or the contention resolution message sent by the base station, where the D2D-C-RNTI is carried in the RA response message or the contention resolution message, or the first UE is also The D2D-C-RNTI allocation message directly sent by the base station may be received.
  • Step 205 The base station sends a paging message to the second UE, where the paging message is used to indicate the D2D link configuration parameter and the RRC connection configuration parameter of the second UE, and the paging message may further carry the time for the second UE. Advancing the TA value and/or the transmit power value, or may instruct the first UE and the second UE to share the timing advance TA value and/or the transmit power value such that the second UE will share the TA value with the first UE and/or The transmit power value is used as the TA value and/or the transmit power value of the second UE to access the second UE to the base station.
  • the paging message further includes an S-TMSI of the second UE and a Cell-Radio Network Temporary Identity (C-RNTI) allocated for the second UE. Therefore, the second UE receives the paging message from the base station from the base station, and acquires the D2D link configuration parameter and the RRC connection configuration parameter of the second UE, where the D2D link configuration parameter is used for the first A D2D connection between the UE and the first UE.
  • the D2D link configuration parameter and the RRC connection configuration parameter of the second UE may be carried in the paging message sent by the base station to the second UE, and it is also possible that the second UE receives the paging message from the base station and determines that the D2D is allowed to be performed.
  • the paging response message is sent to confirm that the D2D communication can be performed, after which the base station sends the D2D link configuration parameter and the RRC connection configuration parameter of the second UE to the second UE by using another message. It is also possible that the base station sends the D2D link configuration parameter of the second UE and the scheduling information of the RRC connection configuration parameter to the second UE by using the D2D-C-RNTI scrambled physical downlink control channel (PDCCH), so that the second UE utilizes
  • the D2D-C-RNTI descrambled physical downlink control channel PDCCH acquires the D2D link configuration parameter of the second UE and the scheduling information of the RRC connection configuration parameter, and further acquires the D2D chain of the second UE according to the scheduling information.
  • the second UE can also utilize the D2D-C-RNTI to obtain the timing advance TA value and/or the transmit power value. It should be noted that, in the case that the scheduling information is transmitted by using the D2D-C-RNTI, the second UE needs to first acquire the D2D-C-RNTI allocated by the base station. For this purpose, the second UE receives the D2D-C-RNTI allocation message sent by the base station, and the D2D-C-RNTI allocation message may be carried in the paging message sent by the base station to the second UE, or may be sent by using a separate message. .
  • the base station may further include an uplink grant UL grant for the second UE according to the C-RNTI of the second UE, where the UL grant may be included in the paging message sent by the base station.
  • the sending to the second UE may also be sent by the base station to the second UE as a separate message.
  • Step 206 The first UE establishes a D2D connection with the second UE, and completes an RRC connection establishment with the base station according to the respective RRC connection configuration parameters. Since the first UE obtains its D2D link configuration parameters through step 204, and the second UE obtains its D2D link configuration parameters through step 205, the first UE and the second UE can establish a D2D connection with each other. After the connection is established, the first UE and the second UE may respectively send an RRC Connection Setup Complete message and a D2D Connection Configuration Complete message to the base station.
  • the TA value and/or the transmit power value of the second UE may be a TA value and/or a transmit power value shared with the first UE.
  • One way is that before step 201, the first UE detects the second Obtaining, by the UE, a path loss or a distance between the first UE and the second UE, and acquiring a second UE identifier, where the first UE determines, according to the path loss or the distance, that the second UE can share the TA value with the first UE and/or Transmit power value.
  • the first UE may send, by using the RRC connection setup request message, indication information indicating that the first UE and the second UE share the timing advance TA value and/or the transmit power value, and the second UE identifier is sent to the base station, so that the base station The shared TA value and/or transmit power value can be sent to the second UE.
  • the first UE detects the second UE to obtain a path loss or distance between the first UE and the second UE, and further acquires the second UE identifier.
  • the first UE reports the path loss or distance and the second UE identity to the base station, so that the base station determines whether the second UE can share the TA value and/or the transmit power value with the first UE.
  • the base station determines that the second UE can share the TA value and/or the transmit power value with the first UE, the base station transmits the shared TA value and/or the transmit power value to the second UE.
  • the scheduling information is acquired, and the first UE and the second UE are received according to the scheduling information.
  • the method for monitoring and transmitting the PDCCH using the D2D-C-RNTI is specific as follows:
  • the first UE and the second UE are both monitored by the D2D-C-RNTI, and the base station sends the PDCCH by using the D2D-C-RNTI, and the following new information is added to the PDCCH:
  • 01 indicates that the primary UE of the Ud link receives, and the secondary UE transmits
  • the PDCCH scheduling information of the D2D UE that the base station uses the D2D-C-RNTI scrambling transmission includes the following information:
  • Transceiver status indication information of each UE in a currently scheduled time unit
  • the receiving and receiving status indication information of each UE may be indicated by bits of different locations, and the location information in the indication information corresponding to each UE may be pre-configured by high layer signaling.
  • the respective D2Ds are sent by the base station to the first UE and the second UE, respectively.
  • Link configuration parameters It can be seen that, in the process of establishing D2D communication between the first UE and the second UE, only a random access procedure between the first UE and the base station is required, and the second UE and the base station do not need to repeatedly perform random access, thereby reducing the D2D connection. Established delay.
  • the base station since the S-TMSI is unique within the TA range and is unique within the base station range, the base station does not need to notify the mobility management entity (MME) to perform its execution for the second UE in the process of paging the second UE.
  • MME mobility management entity
  • the paging of the two UEs avoids the impact of the paging process on the core network, thereby further reducing the delay of the D2D connection establishment.
  • the present invention does not limit whether the base station performs paging through the MME.
  • the first UE or the second UE may detect the path loss or distance between the first UE and the second UE periodically or event-triggered, after the first UE and the second UE establish a connection with the network, and subsequently
  • the base station can separately maintain the TA update of the first UE and the second UE, that is, separately send the TA command command to the first UE and the second UE. It is also possible to use a TA command command to update according to the distance information reported by the UE timing report or event triggering. If a TA command is used, the first UE and the second UE uniformly use the point-to-point cell wireless network temporary identifier (D2D). -C-RNTI ) Obtain the scheduling information of the TA command, and then update according to the acquired TA command.
  • D2D point-to-point cell wireless network temporary identifier
  • FIG. 3 is a schematic flow chart showing a method of establishing a connection of a D2D terminal according to another embodiment of the present invention.
  • the first UE of the calling user equipment establishes a D2D connection with the second UE of the called user equipment, and performs the following steps:
  • Step 301 The first user equipment UE sends a preamble preamble to the base station;
  • Step 302 The base station sends a random access response RA response message to the first UE after receiving the preamble sent by the first UE, where the first UE receives the random access response message sent by the base station in response to the preamble.
  • the time advance TA value and/or the transmit power value for the first UE may be carried in the message for the first UE to access the base station for use.
  • Step 303 The first UE sends a second UE identifier to the base station, where the second UE is a D2D communication target of the first UE, that is, the first UE needs to establish D2D communication with the second UE.
  • the second UE identity may be, for example, a Temporary Mobile Subscriber Identity (S-TMSI) of the second UE or other identity.
  • the first UE may send an RRC connection setup request message to the base station, where the RRC connection setup request message carries the second UE identifier.
  • the above steps 301-303 correspond to steps 201-203 in FIG. Step 304:
  • the base station sends the D2D link configuration parameter and the RRC connection configuration parameter of the first UE and the second UE to the first UE, and also the TA value and/or the second UE of the second UE, in response to the second UE identifier.
  • the power value information is sent to the first UE. It is also possible that the first UE and the second UE share the TA value and/or the transmit power value, and the base station transmits, to the first UE, indication information that the second UE shares the TA value and/or the transmit power value with the first UE.
  • the eNB may send an RRC connection setup message to the first UE, where the RRC connection setup message carries the D2D link configuration parameters and the RRC connection configuration parameters of the first UE and the second UE, and the TA value of the second UE. And/or transmit power value information or indication information that the second UE shares the TA value and/or the transmit power value with the first UE. It is also possible that the base station transmits the scheduling information of the foregoing information to the first UE by using the D2D-C-RNTI scrambling physical downlink control channel (PDCCH), so that the first UE uses the D2D-C-RNTI to descramble the physical downlink control channel PDCCH.
  • PDCCH physical downlink control channel
  • Scheduling information and further obtaining the above information according to the scheduling information.
  • the first UE needs to first acquire the D2D-C-RNTI allocated by the base station.
  • the configuration information of the first UE and the second UE can be configured using Delta to save message resources.
  • the meaning of the Delta configuration is that the same configuration information appears only once, so that message resources can be saved.
  • Step 305 The first UE sends the D2D link configuration parameter and the RRC connection configuration parameter of the second UE, and the TA value and/or the transmit power value information of the second UE to the second UE, or sends the second UE to the second UE.
  • the second UE correspondingly receives the D2D link configuration parameter and the RRC connection configuration parameter of the second UE and the TA value and/or the transmission power value sent by the first UE.
  • the first UE sends a D2D cell radio network temporary identifier D2D-C-RNTI to the second UE, where the D2D-C-RNTI is used by the second UE to acquire the second UE from the physical downlink control channel PDCCH.
  • the information is such that the second UE can use the D2D-C-RNTI to descramble the physical downlink control channel PDCCH to acquire the scheduling information sent by the base station, and further acquire the foregoing information of the second UE according to the scheduling information.
  • Step 306 The first UE establishes a D2D connection with the second UE, and completes an RRC connection establishment with the base station based on the RRC connection configuration parameter of the first UE, and the second UE establishes a D2D connection with the first UE, and is based on The RRC connection configuration parameter of the second UE completes the RRC connection establishment with the base station. Since the first UE obtains its D2D link configuration parameters through step 304, and the second UE obtains its D2D link configuration parameters through step 305, the first UE and the second UE can establish a D2D connection with each other.
  • the Uu RRC connection ie, the RRC connection between the second UE and the base station
  • the Ud D2D link ie, between the first UE and the second UE
  • the first UE may send the RRC connection setup complete message and the D2D configuration complete message to the base station by the first UE.
  • the TA value and/or the transmit power value of the second UE may be a TA value and/or a transmit power value shared with the first UE.
  • the TA value update process in this embodiment is the same as the embodiment shown in FIG. 2 and will not be described again.
  • the first UE if the first UE has established a connection with the base station before initiating the D2D communication request with the second UE, that is, the first UE is currently in the connected state, then only the first UE needs to send the second UE to the base station.
  • a D2D communication request message of the UE where the request message includes: an identifier of the second UE, such as an S-TMSI or a user number, a TA value and/or a transmit power value shared by the first UE and the second UE, or a first UE and The indication value of the TA value and/or the transmission power value shared by the second UE, or the request message includes: an identifier of the second UE, such as an S-TMSI or a user number, between the first UE and the second UE Path loss or distance.
  • an identifier of the second UE such as an S-TMSI or a user number
  • the base station may omit the step of paging the second UE, and the base station only needs to send the D2D to the second UE.
  • a connection establishment request is made to inquire whether the second UE allows D2D communication with the first UE. Or the base station may determine whether to allow the first UE to perform D2D communication with the second UE, and if so, notify the second UE to establish D2D communication with the first UE.
  • the present invention also provides embodiments of corresponding user equipment, base stations, and communication systems.
  • a first user equipment UE is provided.
  • Figure 4 shows the root A schematic structural diagram of a first UE according to an embodiment of the present invention.
  • the first UE 40 includes: a first sending device 401, configured to send a preamble preamble to the base station, and configured to send a second UE identifier to the base station, where the second UE is a D2D communication target of the first UE;
  • the first receiving device 402 is configured to receive a random access response message sent by the base station in response to the preamble, and to receive a D2D link configuration parameter of the first UE returned by the base station in response to the second UE identifier, and RRC connection configuration parameter; and first connection establishing means 403, configured to establish a D2D connection with the second UE based on the D2D link configuration parameter of the first UE, and complete RRC with the base station based on the RRC connection configuration parameter The connection is established.
  • the first user equipment further includes: a first sharing determining means 404, configured to detect a second UE to acquire a path loss or a distance between the first UE and the second UE, and according to the path loss or distance Determining whether the second UE can share the TA value and/or the transmit power value with the first UE; or the first sending device 401 is configured to report to the base station whether it is determined whether the second UE can share the TA value with the first UE and/or Or the path loss or distance of the transmit power value.
  • a first sharing determining means 404 configured to detect a second UE to acquire a path loss or a distance between the first UE and the second UE, and according to the path loss or distance Determining whether the second UE can share the TA value and/or the transmit power value with the first UE; or the first sending device 401 is configured to report to the base station whether it is determined whether the second UE can share the TA value with the first UE and/or Or the path loss or distance of the transmit power
  • the first receiving device 402 is further configured to receive an RRC connection setup message from a base station, where the RRC connection setup message carries the first UE returned by the base station in response to the second UE identifier. D2D link configuration parameters.
  • the RRC connection setup message further carries: a D2D link configuration parameter of the second UE, and a TA value and/or a transmit power value information of the second UE;
  • the first sending device 401 is further configured to: Transmitting, to the second UE, a D2D link configuration parameter of the second UE, and a TA value and/or transmit power value information of the second UE.
  • the RRC connection setup message further includes: a D2D link configuration parameter of the second UE, and indication information that the second UE shares the TA value and/or the transmit power value with the first UE;
  • the sending device 401 is further configured to send, to the second UE, a D2D link configuration parameter of the second UE, and a shared TA value and/or a transmit power value.
  • the first user equipment further includes: a first temporary identifier obtaining means 405, configured to acquire a D2D cell radio network temporary identifier D2D-C-RNTI allocated by the base station, where the D2D-C-RNTI is used for the first UE And acquiring, by the second UE, the scheduling information of the first UE and the second UE from the physical downlink control channel PDCCH; and the first receiving device 402 is configured to acquire, by using the D2D-C-RNTI, the physical downlink control channel PDCCH, the base station to send The scheduling information of the D2D link configuration parameter of the first UE, and further acquiring the first UE according to the scheduling information D2D link configuration parameters.
  • a first temporary identifier obtaining means 405 configured to acquire a D2D cell radio network temporary identifier D2D-C-RNTI allocated by the base station, where the D2D-C-RNTI is used for the first UE
  • the first receiving device 402 is configured to acquire, by using the D2D
  • a second user equipment UE is provided.
  • Fig. 5 shows a schematic structural diagram of a second UE according to an embodiment of the present invention.
  • the second user equipment UE 50 includes: a second receiving device 502, configured to receive a paging message from the base station from the base station, and acquire a D2D link configuration parameter of the second UE based on the paging message;
  • the device 503 is configured to establish a D2D connection with the first UE based on the D2D link configuration parameter of the second UE.
  • the second user equipment further includes: a second temporary identifier obtaining means 505, configured to acquire a D2D cell radio network temporary identifier D2D-C-RNTI carried by the paging message, where the D2D-C-RNTI is used for Acquiring, by the UE and the second UE, the scheduling information of the first UE and the second UE from the physical downlink control channel PDCCH; and the second receiving apparatus 502 is configured to use the D2D-C-RNTI to descramble the physical downlink control channel PDCCH
  • a second user equipment UE is provided.
  • Fig. 6 shows a schematic structural diagram of a second UE according to an embodiment of the present invention.
  • the second user equipment UE 60 includes: a third receiving device 602, configured to receive D2D link configuration parameters and RRC connection configuration parameters of the second UE that are forwarded by the first UE from the base station; And establishing a D2D connection with the first UE based on the D2D link configuration parameter of the second UE, and completing an RRC connection establishment with the base station according to the RRC connection configuration parameter.
  • the third receiving device 602 is further configured to acquire a timing advance TA value and/or a transmit power value of the second UE from the first UE.
  • the second user equipment UE further includes: a third temporary identifier obtaining means 605, configured to receive a D2D cell radio network temporary identifier D2D-C-RNTI from the first UE, where the D2D-C-RNTI is used for The UE and the second UE acquire scheduling information of the first UE and the second UE from the physical downlink control channel PDCCH.
  • a third temporary identifier obtaining means 605 configured to receive a D2D cell radio network temporary identifier D2D-C-RNTI from the first UE, where the D2D-C-RNTI is used for The UE and the second UE acquire scheduling information of the first UE and the second UE from the physical downlink control channel PDCCH.
  • FIG. 7 shows a schematic structural diagram of a base station according to an embodiment of the present invention.
  • the base station 70 includes: a fourth receiving device 702, configured to receive a preamble preamble from the first UE, and to receive a second UE identifier from the first user equipment UE, where the fourth sending device 701 is configured to respond to the The preamble sends a random access response message to the first UE, and a D2D used to send the first UE to the first UE based on the second UE identifier.
  • a link configuration parameter, the D2D link configuration parameter of the first UE is used for a D2D connection between the first UE and the second UE.
  • the fourth sending device 701 further sends a paging message to the second UE, where the paging message is used to indicate a D2D link configuration parameter of the second UE.
  • the base station 70 further includes a scrambling device 703, configured to send the first UE and the second UE to the first UE and the second UE by using a D2D cell radio network temporary identifier D2D-C-RNTI scrambled physical downlink control channel PDCCH. Scheduling information of the D2D link configuration parameters of the UE.
  • an embodiment of the present invention further provides a communication system, including the foregoing first user equipment, second user equipment, and a base station.
  • the first UE is equivalent to the first UE in the corresponding method embodiment
  • the second UE is equivalent to the second UE in the corresponding method embodiment
  • the technical implementation details and corresponding methods in each module The embodiment is the same, and the description is no longer expanded.
  • the division of the device module in the embodiment of the present invention is a functional division, and the actual specific structure may be the splitting or merging of the above functional modules.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

La présente invention concerne un procédé, un dispositif et un système pour établir une connexion avec un terminal D2D (dispositif à dispositif), le procédé consistant en ce qui suit : un premier équipement utilisateur (UE) transmet un préambule à un eNB ; le premier UE reçoit un message de réponse d'accès aléatoire transmis par l'eNB en réponse au préambule ; le premier UE transmet un identificateur de second UE à l'eNB, le second UE étant la cible de communication D2D du premier UE ; le premier UE reçoit le paramètre de configuration de liaison D2D et le paramètre de configuration de connexion RRC du premier UE retournés par l'eNB en réponse à l'identificateur du second UE ; le premier UE établit une connexion D2D avec le second UE sur la base du paramètre de configuration de liaison D2D du premier UE, et établit une connexion RRC avec l'eNB sur la base du paramètre de configuration de connexion RRC.
PCT/CN2012/082341 2011-09-28 2012-09-28 Procédé, dispositif et système d'établissement d'une connexion avec un terminal d2d WO2013044855A1 (fr)

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