WO2016202227A1 - 一种层2链路标识的选择、通知方法及装置 - Google Patents

一种层2链路标识的选择、通知方法及装置 Download PDF

Info

Publication number
WO2016202227A1
WO2016202227A1 PCT/CN2016/085611 CN2016085611W WO2016202227A1 WO 2016202227 A1 WO2016202227 A1 WO 2016202227A1 CN 2016085611 W CN2016085611 W CN 2016085611W WO 2016202227 A1 WO2016202227 A1 WO 2016202227A1
Authority
WO
WIPO (PCT)
Prior art keywords
layer
link identifier
communication
ues
link
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN2016/085611
Other languages
English (en)
French (fr)
Inventor
张惠英
赵亚利
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
China Academy of Telecommunications Technology CATT
Original Assignee
China Academy of Telecommunications Technology CATT
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by China Academy of Telecommunications Technology CATT filed Critical China Academy of Telecommunications Technology CATT
Publication of WO2016202227A1 publication Critical patent/WO2016202227A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Images

Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W4/00Services specially adapted for wireless communication networks; Facilities therefor

Definitions

  • the present invention relates to the field of wireless communication technologies, and in particular, to a layer 2 link identifier selection, notification method and apparatus.
  • D2D device to device discovery
  • D2D device to device communication
  • D2D discovery and D2D communication are implemented using the PC5 interface.
  • 3GPP Rel-12 has implemented one-to-many communication on the PC5 interface.
  • the main principle is that the user equipment (User Equipment, UE) in the group passes the source in the Media Access Control (MAC) subheader.
  • the address (SRC) identifies itself; after receiving the data packet, the receiving UE in the group first combines the destination address (DST) in the received MAC packet header with the physical layer channel scrambling code to determine the group identification information, and then determines Whether the identification information of the group is the same as the group identifier (ProSe Layer-2 Group ID) of the group.
  • the receiving is confirmed, otherwise it is discarded, thereby implementing one-to-many group communication of the PC5 interface.
  • the SRC ProSe UE ID
  • the SRC ProSe UE ID
  • the shortcoming of the prior art is also that there is no scheme capable of performing UE identification conflict detection.
  • the invention provides a layer 2 link identifier selection, notification method and device for ensuring the uniqueness of the layer 2 link identifier used by the UE in performing D2D communication with other UEs.
  • the embodiment of the invention provides a method for selecting a layer 2 link identifier, including:
  • the used layer 2 link identifier group Determining the used layer 2 link identifier group according to the layer 2 link identifier carried in each information, where the used layer 2 link identifier group is other UEs and UEs other than the UE performing D2D communication with other UEs The layer 2 link identifier used;
  • Link identification including:
  • the used layer 2 link identifier When the layer 2 link identifier used by the UE and other UEs established by the D2D communication belongs to the used layer 2 link identifier group, the used layer 2 link identifier is replaced with the used The layer 2 link identifies the layer 2 link identifier other than the group, and replaces the layer 2 link identifier as the layer 2 link identifier for D2D communication with the UE.
  • the broadcast carries the information of the layer 2 link identifier described above.
  • the information carrying the layer 2 link identification is one of the following information or a combination thereof:
  • a message carried on a MAC PDU of the MAC layer is a message carried on a MAC PDU of the MAC layer.
  • An embodiment of the present invention provides a method for notifying a layer 2 link identifier, including:
  • the broadcast carries the information of the layer 2 link identifier described above.
  • the information carrying the layer 2 link identification is one of the following information or a combination thereof:
  • a message carried on a MAC PDU of the MAC layer is a message carried on a MAC PDU of the MAC layer.
  • An embodiment of the present invention provides a layer 2 link identifier selection apparatus, including:
  • a receiving module configured to receive, on the UE, information that is carried by another UE and carries a layer 2 link identifier
  • a determining module configured to determine, according to a layer 2 link identifier carried in each information, the used layer 2 link identifier group, where the used layer 2 link identifier group is another UE and performs D2D communication with other UEs a layer 2 link identifier used by a UE other than the UE;
  • a selection module configured to select, according to the used layer 2 link identifier group, a layer 2 link identifier other than the used layer 2 link identifier group as a layer 2 chain for performing D2D communication between the UE and other UEs Road sign.
  • the selection module is further used to:
  • the used layer 2 link identifier When the layer 2 link identifier used by the UE and other UEs established by the D2D communication belongs to the used layer 2 link identifier group, the used layer 2 link identifier is replaced with the used The layer 2 link identifies the layer 2 link identifier other than the group, and replaces the changed layer 2 link identifier as the layer 2 link identifier of the UE line D2D communication.
  • the determining module is further configured to determine a layer 2 link identifier used by the UE for D2D communication with other UEs, and a layer 2 link identifier used by other UEs performing D2D communication with the UE. ;
  • the method further includes: a broadcast module, configured to broadcast information carrying the layer 2 link identifier.
  • the information carrying the layer 2 link identification is one of the following information or a combination thereof:
  • a message carried on a MAC PDU of the MAC layer is a message carried on a MAC PDU of the MAC layer.
  • An embodiment of the present invention provides a layer 2 link identifier notification apparatus, including:
  • a determining module configured to determine a layer 2 link identifier used by the UE to perform D2D communication with other UEs, and a layer 2 link identifier used by other UEs performing D2D communication with the UE;
  • the broadcast module is configured to broadcast information carrying the layer 2 link identifier.
  • the information carrying the layer 2 link identification is one of the following information or a combination thereof:
  • a message carried on a MAC PDU of the MAC layer is a message carried on a MAC PDU of the MAC layer.
  • An embodiment of the present invention provides a UE, including:
  • a processor for reading a program in the memory performing the following process:
  • the used layer 2 link identifier group Determining the used layer 2 link identifier group according to the layer 2 link identifier carried in each information, where the used layer 2 link identifier group is other UEs and UEs other than the UE performing D2D communication with other UEs The layer 2 link identifier used;
  • a layer 2 link identifier of the used layer 2 link identifier group as a layer 2 link identifier for performing D2D communication between the UE and other UEs;
  • the transceiver is used to send and receive data under the control of the processor, and performs the following processes:
  • Receiving information carried by other UEs carrying the layer 2 link identifier Receiving information carried by other UEs carrying the layer 2 link identifier.
  • the processor is used to:
  • the used layer 2 link identifier When the layer 2 link identifier used by the UE and other UEs established by the D2D communication belongs to the used layer 2 link identifier group, the used layer 2 link identifier is replaced with the used The layer 2 link identifies the layer 2 link identifier other than the group, and replaces the layer 2 link identifier as the layer 2 link identifier for D2D communication with the UE.
  • the processor is further configured to:
  • the transceiver is further used to:
  • the broadcast carries the information of the layer 2 link identifier described above.
  • the information carrying the layer 2 link identification is one of the following information or a combination thereof:
  • a message carried on a MAC PDU of the MAC layer is a message carried on a MAC PDU of the MAC layer.
  • This embodiment provides another UE, including:
  • a processor for reading a program in the memory performing the following process:
  • a transceiver for transmitting data under the control of a processor performing the following processes:
  • the broadcast carries the information of the layer 2 link identifier described above.
  • the information carrying the layer 2 link identification is one of the following information or a combination thereof:
  • a message carried on a MAC PDU of the MAC layer is a message carried on a MAC PDU of the MAC layer.
  • each UE broadcasts the layer 2 link identifier used by the UE to perform D2D communication with other UEs, and performs D2D communication with the UE.
  • each UE receives the information of the layer 2 link identifier broadcasted by other UEs, and selects the layer 2 chain other than the used layer 2 link identifier group according to the selection.
  • the road identifier is used as a layer 2 link identifier for D2D communication between the UE and other UEs.
  • the UE identification conflict detection scheme provides a solution for the one-to-one communication of the access layer on the basis of the existing D2D communication mechanism, and ensures the layer 2 link identifier used by the UE in performing D2D communication with other UEs. Uniqueness avoids the problem of data transmission and reception errors caused by multiple UEs using the same UE identity.
  • FIG. 1 is a schematic structural diagram of a D2D discovery/communication according to an embodiment of the present invention
  • FIG. 2 is a schematic diagram of a SL-SCH MAC subheader according to an embodiment of the present invention
  • FIG. 3 is a schematic diagram of a scenario in which a UE identity conflict occurs in a one-to-one communication of a PC5 interface according to an embodiment of the present invention
  • FIG. 4 is a schematic flowchart of an implementation method of a notification method for a layer 2 link identifier according to an embodiment of the present invention
  • FIG. 5 is a schematic flowchart of implementing a method for selecting a link identifier of a layer 2 according to an embodiment of the present invention
  • FIG. 6 is a schematic structural diagram of a MAC subheader corresponding to a MAC PDU according to an embodiment of the present invention
  • FIG. 7 is a schematic diagram of a format of a MAC PDU according to an embodiment of the present invention.
  • FIG. 8 is a schematic diagram of a communication scenario for selecting a link identifier of a layer 2 before a one-to-one communication initiation according to an embodiment of the present invention
  • FIG. 9 is a schematic diagram of a communication scenario in which a layer 2 link identifier conflict is found in a one-to-one communication process according to an embodiment of the present invention.
  • FIG. 10 is a schematic structural diagram of a device for selecting a link identifier of a layer 2 according to an embodiment of the present invention
  • FIG. 11 is a schematic structural diagram of a notification device for a layer 2 link identifier according to an embodiment of the present invention.
  • FIG. 12 is a schematic structural diagram of a UE according to an embodiment of the present invention.
  • FIG. 13 is a schematic structural diagram of a second UE according to an embodiment of the present invention.
  • GSM Global System of Mobile communication
  • CDMA Code Division Multiple Access
  • WCDMA Wideband Code Division Multiple Access
  • GPRS General Packet Radio Service
  • LTE Long Term Evolution
  • LTE-A Advanced Long Term Evolution
  • UMTS Universal Mobile Telecommunication System
  • the user equipment includes but is not limited to a mobile station (Mobile Station, MS), a mobile terminal (Mobile Terminal), a mobile phone (Mobile Telephone), a mobile phone (handset). And portable devices, etc., the user equipment can communicate with one or more core networks via a Radio Access Network (RAN), for example, the user equipment can be a mobile phone (or "cellular"
  • RAN Radio Access Network
  • the user equipment can be a mobile phone (or "cellular"
  • the telephone device, the computer with wireless communication function, etc., the user equipment can also be a mobile device that is portable, pocket-sized, handheld, built-in, or in-vehicle.
  • D2D Device-to-device
  • D2D which is a terminal-through technology, refers to a method in which neighboring terminals can transmit data through a direct link in a short range without going through a central node (ie, a base station). Forwarding, there is no need to transmit information between UEs through a traditional cellular link.
  • FIG. 1 is a schematic diagram of a D2D discovery/communication structure. As shown in the figure, in 3GPP, the D2D proximity service technology includes the following two categories:
  • the UE uses an Evolution-Universal Terrestrial Radio Access Network (E-UTRA) to confirm that another UE is in its vicinity.
  • E-UTRA Evolution-Universal Terrestrial Radio Access Network
  • the D2D UE can use the service to find nearby taxis, find friends nearby, and the like;
  • D2D communication UEs that are close to each other, by directly establishing a link between two UEs, converting a communication link originally transmitted through the network into a local direct communication link, saving a large amount of bandwidth and network efficiency; or two UEs that are close to each other can use direct link communication to obtain stable high-speed and low-cost communication services.
  • Proximity service communication is generally performed under the control or assistance of the network side, and the evolved base station (eNB) may even dynamically allocate resources for the UE performing the proximity service communication.
  • eNB evolved base station
  • D2D link refers to the link between the device and the device for direct communication
  • D2N link A link between a device and a network node for communication.
  • UEs participating in D2D discovery/communication are divided into two roles:
  • D2D transmitting UE a UE that transmits a D2D discovery/communication message
  • the D2D receives the UE: that is, the UE that receives the discovery/communication message sent by the D2D transmitting UE.
  • FIG. 2 is a schematic diagram of a short sub-shared channel (Sidelink Shared Channel, SL-SCH) MAC subheader.
  • SL-SCH Short sub-shared Channel
  • the UE passes the MAC sub-packet in the data packet on the PC5 interface.
  • the source address (Source, SRC) and destination address (Destination, DST) carried in the header are combined with the channel scrambling code of the physical layer to determine the sender and receiver of the PC5 port data.
  • the SRC is 24 bits, and the value is equal to the ProSe User ID (ProSe UE ID) allocated by the Proximity-based Services Key Management Function.
  • the Proximity-based Services may also be referred to as ProSe.
  • the DST is 16 bits, and its value is equal to the 16 bits higher than the ProSe Layer-2 Group ID assigned by the ProSe Function, and uniquely identifies a group. If the UE is off-network, the ProSe Layer-2 Group ID uses a pre-configured value.
  • the lower 8 bits of the ProSe Layer-2 Group ID are the channel scrambling codes of the physical layer of the PC5 interface.
  • the PC5 interface implements one-to-many D2D communication based on the above manner.
  • FIG 3 is a schematic diagram of a scenario in which a UE identity conflict occurs in a one-to-one communication on a PC5 interface.
  • a UE identity conflict occurs in a one-to-one communication on a PC5 interface
  • the innermost blank area is an area where UE1 can directly perform D2D communication, that is, UE1 can establish a direct PC5 port link with UE2.
  • the dot-like area of the second layer is an area that cannot directly perform D2D communication with the UE1, but the UE located in the point area can directly perform direct D2D communication with a certain UE located in the blank area, for example, the UE3 can directly communicate with the UE2.
  • the grid-like area of the third layer is all areas outside the point area, and its characteristics It is that the UE can neither communicate directly with UE1 nor perform direct D2D communication with any UE in the blank area.
  • the UE1 In the UE identity conflict detection, the UE1 cannot collide with the UE in the blank area, nor can it collide with the UE in the point area. However, the UE1 can use the same identifier as the UE located in the grid area because UE1 and The UEs in the grid-like area do not have a common direct communication object, so there is no misjudgment of data transmission and reception between each other.
  • the SRC ProSe UE ID
  • the SRC ProSe UE ID
  • the access layer is required to provide one-to-one communication, and the UE identity is used as the source and in the one-to-one communication.
  • the destination address, the UE identifier can be globally unique (requires a long number of digits) or unique within a certain range (does not need to be too long). For a unique range, the UE needs to identify the conflict. Detected, because if a collision occurs, multiple UEs will use the same UE identity to cause data transmission and reception errors.
  • the prior art does not need to perform UE identity conflict detection, there is no scheme for performing UE identity conflict detection in the prior art.
  • a solution for detecting the UE 5 interface UE identity conflict is provided, which is used to ensure the uniqueness of the layer 2 link identifier used by the UE in performing D2D communication with other UEs, thereby avoiding the use of the same for multiple UEs.
  • the problem of data transmission and reception errors caused by the UE identity The following description will be made.
  • the UE broadcasts the layer 2 link identifier used by the UE; on the other hand, it also listens to the layer 2 link identifier used by other UEs to perform collision detection, thereby ensuring The uniqueness of the layer 2 link identifier.
  • a scheme for the UE to broadcast the layer 2 link identifier used by the UE and a scheme for monitoring the layer 2 link identifier used by other UEs for collision detection are respectively provided. It is easy to understand that the two schemes can be adopted at the same time on the same UE, or one UE can adopt only one scheme. Obviously, each UE always adopts one of the schemes, and cooperates with the UE adopting another scheme to ensure the uniqueness of the layer 2 link identifier.
  • FIG. 4 is a schematic flowchart of a method for implementing a notification method of a layer 2 link identifier, as shown in the figure, including:
  • Step 401 Determine a layer 2 link identifier used by the UE to perform D2D communication with other UEs, and a layer 2 link identifier used by other UEs that perform D2D communication with the UE.
  • Step 402 Broadcast information carrying the layer 2 link identifier.
  • FIG. 5 is a schematic flowchart of a method for selecting a layer 2 link identifier, as shown in the figure, including:
  • Step 501 Receive, on the UE, information that is carried by another UE and carries a layer 2 link identifier.
  • Step 502 Determine, according to the layer 2 link identifier carried in each information, the used layer 2 link identifier group, where the used layer 2 link identifier group is other UEs and other UEs that perform D2D communication with other UEs.
  • Layer 2 link identifier used by the UE is other UEs and other UEs that perform D2D communication with other UEs.
  • Step 503 Select, according to the used layer 2 link identifier group, a layer 2 link identifier of the used layer 2 link identifier group as a layer 2 link identifier for performing D2D communication between the UE and other UEs.
  • the information carrying the layer 2 link identifier may be one of the following information or a combination thereof:
  • SL-BCH Direct Link Broadcast Channel
  • SL-DCH Direct Link Discovery Channel
  • SL-SCH Sidelink Shared Channel
  • RRC Radio Resource Control
  • Non-access stratum (NAS) messages carried on the PC5 interface transport channel;
  • MAC PDU MAC Protocol Data Unit
  • layer 2 identifies that the broadcast information can be carried in an RRC or NAS message on the SL-BCH or SL-DCH or SL-SCH or any other PC5 interface transport channel, or may be a MAC layer MAC PDU.
  • FIG. 6 is a schematic diagram of a MAC subheader structure corresponding to a MAC PDU
  • FIG. 7 is a schematic diagram of a MAC PDU format.
  • the MAC PDU is taken as an example, and the corresponding MAC subheader and MAC PDU format may be as shown in FIG. 6.
  • a new Logical Channel ID (LCID) can be introduced.
  • the main point of the PC5 interface UE identity conflict detection scheme in the embodiment of the present invention is that the UE that performs D2D transceiving on the PC5 interface sets its own layer 2 link identifier (ProSe) when used in conjunction with the technical solutions provided in FIG. Layer-2 ID) and the layer 2 link identity of the UE communicating with itself are broadcast to nearby UEs, and each UE listens for layer 2 links of nearby UEs for a period of time before starting to initiate one-to-one communication with other UEs.
  • the broadcast information is identified to avoid initiating one-to-one communication using the same UE layer 2 link identity as the received UE layer 2 link identity.
  • the UE needs to listen to UEs sent by other nearby UEs in addition to the UE layer 2 link identifier broadcast information (including its own layer 2 link identifier and the layer 2 link identifier of the UE communicating with itself).
  • the layer 2 link identifies the broadcast information.
  • the UE layer 2 link identifier information broadcasted by the UE that does not communicate with the UE is received, the UE layer 2 link identifier is detected. .
  • the UE After the collision is detected, the UE only needs to reselect a layer 2 link identifier that is different from all received layer 2 link identifiers, and notifies all UEs that are in one-to-one communication with itself. Further, the UE and its communication peer UE naturally need to update their layer 2 link identifier broadcast information.
  • the layer 2 link identifier other than the used layer 2 link identifier group is selected as the layer 2 link for the UE to perform D2D communication with other UEs.
  • Identification which can include:
  • the UE When the UE wants to establish D2D communication with other UEs, select the layer 2 link identifier of the used layer 2 link identifier group as the layer 2 link identifier of the D2D communication that the UE wants to establish with other UEs;
  • the used layer 2 link identifier is replaced with the used layer 2
  • the layer 2 link identifier outside the link identification group is used as the layer 2 link identifier for D2D communication with the UE.
  • the road sign may further include:
  • the broadcast carries the information of the layer 2 link identifier described above.
  • This embodiment is used to describe the implementation process of determining the UE layer 2 link identifier when the UE (in the example, UE1) wishes to establish D2D communication with another UE (in the example, UE5). That is:
  • the layer 2 link identifiers other than the used layer 2 link identifier group are selected as the UE and other UEs.
  • a layer 2 link identifier is selected as the D2D to be established with other UEs except the used layer 2 link identifier group.
  • the layer 2 link identifier of the communication is sufficient.
  • FIG. 8 is a schematic diagram of a communication scenario in which the link identification of the layer 2 is initiated before the one-to-one communication initiation, and the meaning of the innermost blank area, the second layer of the dot area, and the third layer of the grid-like area used in the figure. Referring to Figure 3, in the environment shown in Figure 8, assume:
  • UE5 (layer 2 link identifier is L2 ID5) is performing one-to-one communication with UE2 (layer 2 link identifier is L2 ID2) and UE7 (layer 2 link identifier is L2 ID7);
  • UE2 (layer 2 link identifier is L2 ID2) is performing one-to-one communication with UE3 (layer 2 link identifier is L2 ID3) and UE5 (layer 2 link identifier is L2 ID5);
  • UE3 (layer 2 link identifier is L2 ID3) is performing one-to-one communication with UE2 (layer 2 link identifier is L2 ID2) and UE4 (layer 2 link identifier is L2 ID4);
  • UE1, UE6 and UE8 do not communicate with other UEs.
  • the layer 2 link identifier broadcast information broadcast by UE2 is: L2 ID2, L2 ID3, L2 ID5;
  • the layer 2 link identifier broadcast information broadcast by UE3 is: L2 ID3, L2 ID2, L2 ID4;
  • the layer 2 link identifier broadcast information broadcast by UE4 is: L2 ID4, L2 ID3;
  • the layer 2 link identifier broadcast information broadcast by UE5 is: L2 ID5, L2 ID2, L2 ID7;
  • the layer 2 link identifier broadcast information broadcast by UE7 is: L2 ID7, L2 ID5.
  • UE1 wants to initiate one-to-one communication with UE5, and UE1 can receive layer 2 link identification broadcast information of UE2 and UE5, so that the layer 2 link identifier that UE1 can learn is being used: L2 ID2, L2 ID3, L2 ID5, L2 ID7, then, UE1 needs to avoid selecting these 4 layer 2 link identifiers.
  • the UE1 may mark the layer 2 identifiers that have been used as unavailable according to the received layer 2 link identifier usage broadcast by the nearby UEs, and others are available, and randomly selected from the available L2 identifiers or Select an L2 identifier according to certain rules.
  • UE1 selects L2 ID4 as its own layer 2 link identifier, and establishes one-to-one communication with UE5.
  • it may further include:
  • the broadcast carries the information of the layer 2 link identifier described above.
  • the layer 2 link identification broadcast information of each subsequent UE is updated to:
  • the layer 2 link identifier broadcast information broadcast by UE1 is: L2 ID4, L2 ID5;
  • the layer 2 link identifier broadcast information broadcast by UE2 is: L2 ID2, L2 ID3, L2 ID5;
  • the layer 2 link identifier broadcast information broadcast by UE3 is: L2 ID3, L2 ID2, L2 ID4;
  • the layer 2 link identifier broadcast information broadcast by UE4 is: L2 ID4, L2 ID3;
  • the layer 2 link identifier broadcast information broadcast by UE5 is: L2 ID5, L2 ID2, L2 ID7, L2 ID4;
  • the layer 2 link identifier broadcast information broadcast by UE7 is: L2 ID7, L2 ID5.
  • This embodiment is used to illustrate that when a certain UE (in the example, UE4) changes, for example, the layer 2 link identifier changes after the mobile, and the UE (in the example, UE1) and another UE (in the example, UE5) When there is D2D communication, when the UE (in the example, UE4) changes, the UE (in the case of UE1) layer 2 link identifier conflicts, the implementation process of the UE layer 2 link identifier is determined. That is:
  • the used layer 2 link identifier is replaced with the used layer 2
  • the layer 2 link identifier outside the link identification group is used as the layer 2 link identifier for D2D communication with the UE.
  • the UE1 changes the layer 2 link identifier that is being used, and the used layer 2 link
  • a layer 2 link identifier is selected as the layer 2 link identifier of the D2D communication established with the UE 5.
  • FIG. 9 is a schematic diagram of a communication scenario in which a layer 2 link identifier conflict is found during one-to-one communication, and the innermost blank area, the second layer of the dotted area, and the third layer of the grid-like area are used in the figure. The meaning can be referred to FIG. 3.
  • a one-to-one communication relationship is assumed to be the same as Embodiment 1.
  • UE4 moves to the point area and initiates one-to-one communication with UE2, after which the layer 2 link of each UE
  • the broadcast information is updated to:
  • the layer 2 link identifier broadcast information broadcast by UE1 is: L2 ID4, L2 ID5;
  • the layer 2 link identifier broadcast information broadcast by UE2 is: L2 ID2, L2 ID3, L2 ID5, L2 ID4;
  • the layer 2 link identifier broadcast information broadcast by UE3 is: L2 ID3, L2 ID2, L2 ID4;
  • the layer 2 link identifier broadcast information broadcast by UE4 is: L2 ID4, L2 ID3, L2 ID2;
  • the layer 2 link identifier broadcast information broadcast by UE5 is: L2 ID5, L2 ID2, L2 ID7, L2 ID4;
  • the layer 2 link identifier broadcast information broadcast by UE7 is: L2 ID7, L2 ID5;
  • the layer 2 link identifier broadcast information sent by the UE (UE5) that has a one-to-one communication relationship with itself includes the layer 2 link identifier used by itself.
  • the layer 2 link identification broadcast information transmitted by the UE (UE2) that does not have a one-to-one communication relationship with itself also includes the layer 2 link identifier (L2 ID4) used by itself, and thus the layer 2 chain is determined to be generated. If the path identifier conflicts, UE1 reselects a layer 2 link identifier (L2 ID1), and notifies the new layer 2 link identifier to the UE (UE5) having a one-to-one communication relationship with itself.
  • the UE that is performing D2D communication determines whether the layer 2 link identifier collision occurs by detecting the layer 2 link identifier broadcasted by other UEs, and discovers the layer 2 link identifier used by itself and the layer 2 chain used by other UEs.
  • the layer 2 link identifier used is replaced with the layer 2 link identifier of the used layer 2 link identifier group, and is used as the layer 2 link identifier of the UE for D2D communication.
  • the new layer 2 link identifier is notified to the UE with which D2D communication is performed, and the layer 2 link identifier broadcast information of the UE is updated.
  • it may further include:
  • the broadcast carries the information of the layer 2 link identifier described above.
  • the layer 2 link identification broadcast information of each subsequent UE is updated to:
  • the layer 2 link identifier broadcast information broadcast by UE1 is: L2 ID1, L2 ID5;
  • the layer 2 link identifier broadcast information broadcast by UE2 is: L2 ID2, L2 ID3, L2 ID5, L2 ID4;
  • the layer 2 link identifier broadcast information broadcast by UE3 is: L2 ID3, L2 ID2, L2 ID4;
  • the layer 2 link identifier broadcast information broadcast by UE4 is: L2 ID4, L2 ID3, L2 ID2;
  • the layer 2 link identifier broadcast information broadcast by UE5 is: L2 ID5, L2 ID2, L2 ID7, L2 ID1;
  • the layer 2 link identifier broadcast information broadcast by UE7 is: L2 ID7, L2 ID5.
  • the embodiment of the present invention further provides a layer 2 link identifier selection device, and a layer 2 link identifier notification device.
  • a layer 2 link identifier selection device and a layer 2 link identifier notification device.
  • the principle of solving the problem by these devices and a layer 2 link identifier The selection method and the notification method of a layer 2 link identifier are similar. Therefore, the implementation of these devices can be referred to the implementation of the method, and the repeated description is not repeated.
  • FIG. 10 is a schematic structural diagram of a device for selecting a link identifier of a layer 2, as shown in the figure, which may include:
  • the receiving module 1001 is configured to receive, on the UE, information that is carried by another UE and carries a layer 2 link identifier.
  • the determining module 1002 is configured to determine, according to the layer 2 link identifier carried in each information, the used layer 2 link identifier group, where the used layer 2 link identifier group is another UE and performs D2D communication with other UEs. Layer 2 link identifier used by UEs other than the UE;
  • the selecting module 1003 is configured to select, according to the used layer 2 link identifier group, a layer 2 link identifier other than the used layer 2 link identifier group as a layer 2 for performing D2D communication between the UE and other UEs.
  • Link ID is configured to select, according to the used layer 2 link identifier group, a layer 2 link identifier other than the used layer 2 link identifier group as a layer 2 for performing D2D communication between the UE and other UEs.
  • the selection module can be further used to:
  • the used layer 2 link identifier When the layer 2 link identifier used by the UE and other UEs established by the D2D communication belongs to the used layer 2 link identifier group, the used layer 2 link identifier is replaced with the used The layer 2 link identifies the layer 2 link identifier other than the group, and replaces the layer 2 link identifier as the layer 2 link identifier for D2D communication with the UE.
  • the determining module may be further configured to determine a layer 2 link identifier used by the UE to perform D2D communication with other UEs, and a layer 2 link identifier used by other UEs performing D2D communication with the UE;
  • the selection device may further include:
  • the broadcast module 1004 is configured to broadcast information carrying the layer 2 link identifier.
  • the information carrying the layer 2 link identifier may be one of the following information or a combination thereof:
  • a message carried on a MAC PDU of the MAC layer is a message carried on a MAC PDU of the MAC layer.
  • FIG. 11 is a schematic structural diagram of a notification device of a layer 2 link identifier, as shown in the figure, which may include:
  • a determining module 1101 configured to determine a layer 2 link identifier used by the UE to perform D2D communication with other UEs, and a layer 2 link identifier used by other UEs performing D2D communication with the UE;
  • the broadcast module 1102 is configured to broadcast information carrying the layer 2 link identifier.
  • the information carrying the layer 2 link identifier may be one of the following information or a combination thereof:
  • a message carried on a MAC PDU of the MAC layer is a message carried on a MAC PDU of the MAC layer.
  • FIG. 12 is a schematic structural diagram of a UE. As shown in the figure, the UE includes:
  • the processor 1200 is configured to read a program in the memory 1220 and perform the following process:
  • the used layer 2 link identifier group Determining the used layer 2 link identifier group according to the layer 2 link identifier carried in each information, where the used layer 2 link identifier group is other UEs and UEs other than the UE performing D2D communication with other UEs The layer 2 link identifier used;
  • a layer 2 link identifier of the used layer 2 link identifier group as a layer 2 link identifier for performing D2D communication between the UE and other UEs.
  • the transceiver 1210 is configured to send and receive data under the control of the processor 1200, and performs the following processes:
  • Receiving information carried by other UEs carrying the layer 2 link identifier Receiving information carried by other UEs carrying the layer 2 link identifier.
  • the processor 1200 is configured to:
  • the used layer 2 link identifier When the layer 2 link identifier used by the UE and other UEs established by the D2D communication belongs to the used layer 2 link identifier group, the used layer 2 link identifier is replaced with the used The layer 2 link identifies the layer 2 link identifier other than the group, and replaces the layer 2 link identifier as the layer 2 link identifier for D2D communication with the UE.
  • processor 1200 can further be used to:
  • the transceiver 1210 can further be used to:
  • the broadcast carries the information of the layer 2 link identifier described above.
  • the information carrying the layer 2 link identifier is one of the following information or a combination thereof:
  • a message carried on a MAC PDU of the MAC layer is a message carried on a MAC PDU of the MAC layer.
  • the bus architecture can include any number of interconnected buses and bridges, specifically linked by one or more processors represented by processor 1200 and various circuits of memory represented by memory 1220.
  • the bus architecture can also link various other circuits such as peripherals, voltage regulators, and power management circuits, which are well known in the art and, therefore, will not be further described herein.
  • the bus interface provides an interface.
  • Transceiver 1210 may be a plurality of components, including a transmitter and a receiver, providing means for communicating with various other devices on a transmission medium.
  • the user interface 1230 may also be an interface capable of externally connecting the required devices, including but not limited to a keypad, a display, a speaker, a microphone, a joystick, and the like.
  • the processor 1200 is responsible for managing the bus architecture and general processing, and the memory 1220 can store data used by the processor 1200 in performing operations.
  • FIG. 13 is a schematic diagram of a structure of a UE. As shown in the figure, the UE includes:
  • the processor 1300 is configured to read a program in the memory 1320 and perform the following process:
  • the transceiver 1310 is configured to send data under the control of the processor 1300, and performs the following process:
  • the broadcast carries the information of the layer 2 link identifier described above.
  • the information carrying the layer 2 link identifier is one of the following information or a combination thereof:
  • a message carried on a MAC PDU of the MAC layer is a message carried on a MAC PDU of the MAC layer.
  • the bus architecture may include any number of interconnected buses and bridges, specifically linked by one or more processors represented by processor 1300 and various circuits of memory represented by memory 1320.
  • the bus architecture can also link various other circuits such as peripherals, voltage regulators, and power management circuits, which are well known in the art and, therefore, will not be further described herein.
  • the bus interface provides an interface.
  • Transceiver 1310 can be a plurality of components, including a transmitter and a receiver, providing means for communicating with various other devices on a transmission medium.
  • the user interface 1330 may also be an interface capable of externally connecting the required devices, including but not limited to a keypad, a display, a speaker, a microphone, a joystick, and the like.
  • the processor 1300 is responsible for managing the bus architecture and general processing, and the memory 1320 can store data used by the processor 1300 in performing operations.
  • the UE performing D2D transmission and reception on the PC5 interface broadcasts its own layer 2 link identifier and the layer 2 link identifier of the UE communicating with itself to the nearby UE. And each UE realizes the collision avoidance and resolution of the layer 2 link identifier by layer 2 link identifier collision detection in the layer 2 link identifier monitoring and communication process before the communication is initiated.
  • the following programs are included:
  • the UE performing one-to-one communication broadcasts the layer 2 link identity of itself and the UE communicating with itself.
  • the UE Before initiating one-to-one communication with other UEs, the UE first reads the layer 2 link identifier broadcast information of the nearby UE, and selects the layer 2 link identifier different from the received layer 2 link identifier.
  • the UE continues to listen to the layer 2 link identifier broadcast information of the surrounding UEs during the communication process, and when the UE layer 2 link identifier information broadcasted by the UE that does not communicate with the UE is included in the UE layer 2 link identifier, A UE layer 2 link identity conflict is detected.
  • the UE After determining that the layer 2 link identifier conflict occurs, the UE selects a new layer 2 link identifier different from all received layer 2 link identifiers, and notifies the new layer 2 link identifier to the UE that communicates with itself.
  • the UE that changes the layer 2 link identifier and the UE that communicates with it update layer 2 link identification broadcast information.
  • the UE may maintain a database of the layer 2 link identifier occupation status, update the database according to the received layer 2 link identifier broadcasted by the nearby UE, and mark the received layer 2 link identifier as unavailable, when the UE needs to generate the layer 2 When the link is identified, it can be generated from the available layer 2 link identifier.
  • the layer 2 link identifier broadcast information sent by the UE may be an RRC or NAS message carried on the SL-BCH or SL-DCH or SL-SCH or any other PC5 interface transport channel, or may be a MAC layer MAC PDU.
  • the embodiment of the invention provides a conflict avoidance and collision solution for the PC5 interface UE identifier, thereby providing a solution for the one-to-one communication of the access layer based on the existing D2D communication mechanism.
  • embodiments of the present invention can be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment, or a combination of software and hardware. Moreover, the invention can take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) including computer usable program code.
  • computer-usable storage media including but not limited to disk storage, CD-ROM, optical storage, etc.
  • the computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture comprising the instruction device.
  • the apparatus implements the functions specified in one or more blocks of a flow or a flow and/or block diagram of the flowchart.
  • These computer program instructions can also be loaded onto a computer or other programmable data processing device such that a series of operational steps are performed on a computer or other programmable device to produce computer-implemented processing for execution on a computer or other programmable device.
  • the instructions provide steps for implementing the functions specified in one or more of the flow or in a block or blocks of a flow diagram.

Landscapes

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

Abstract

公开了一种层2链路标识的选择、通知方法及装置,包括:通知方案中,确定用户设备与其他各个用户设备进行设备到设备通信所使用的层2链路标识;并广播携带有层2链路标识的信息。选择方案中,在用户设备上接收其他用户设备广播的携带有层2链路标识的信息;根据各信息中携带的层2链路标识确定已用层2链路标识组;根据已用层2链路标识组,选择已用层2链路标识组以外的层2链路标识作为用户设备与其他各个用户设备进行设备到设备通信的层2链路标识。采用本发明,保证了用户设备与其他用户设备进行设备到设备通信时所使用的层2链路标识的唯一性,避免了多个用户设备使用相同的用户设备标识造成的数据收发错误的问题。

Description

一种层2链路标识的选择、通知方法及装置
本申请要求在2015年06月19日提交中国专利局、申请号为201510346634.7、发明名称为“一种层2链路标识的选择、通知方法及装置”的中国专利申请的优先权,其全部内容通过引用结合在本申请中。
技术领域
本发明涉及无线通信技术领域,特别涉及一种层2链路标识的选择、通知方法及装置。
背景技术
移动通信系统未来发展中,为了更好的满足用户需求,引入了D2D发现(Device to Device Discovery)机制和D2D通信(Device to Device Communication)机制。
D2D发现和D2D通信利用PC5接口实现。目前3GPP Rel-12已经实现了PC5接口的一对多通信,其主要原理是组内发送用户设备(User Equipment,UE)通过数据包媒体接入控制(Media Access Control,MAC)子头中的源地址(SRC)标识自己;组内接收UE在接收到数据包后,首先将接收到的数据包MAC子头中的目的地址(DST)与物理层信道扰码相结合确定组标识信息,然后判断该组标识信息是否与自己所在的组标识(ProSe Layer-2Group ID)相同,如果相同,则确认接收,否则丢弃,从而实现PC5接口的一对多组通信。在一对多通信中,用于标识UE的SRC(ProSe UE ID)是由ProSe Key Management Function分配的,且能够确保在一个组内是唯一的,因此UE不需要进行UE标识冲突检测。
现有技术的不足也在于:没有能够进行UE标识冲突检测的方案。
发明内容
本发明提供了一种层2链路标识的选择、通知方法及装置,用以保证UE与其他UE进行D2D通信时所使用的层2链路标识的唯一性。
本发明实施例提供了一种层2链路标识的选择方法,包括:
在UE上接收其他UE广播的携带有层2链路标识的信息;
根据各信息中携带的层2链路标识确定所述已用层2链路标识组,所述已用层2链路标识组是其他UE及与其他UE进行D2D通信的所述UE以外的UE所使用的层2链路标识;
根据所述已用层2链路标识组,选择所述已用层2链路标识组以外的层2链路标识作 为所述UE与其他各个UE进行D2D通信的层2链路标识。
在一个实施例中,根据所述已用层2链路标识组,选择所述已用层2链路标识组以外的层2链路标识作为所述UE与其他各个UE进行D2D通信的层2链路标识,包括:
在确定所述UE与其他各个UE已建立的D2D通信所使用的层2链路标识后,和/或,在确定所述UE欲与其他各个UE建立D2D通信后,按如下方式之一或者其组合执行;
在所述UE欲与其他各个UE建立D2D通信时,选择所述已用层2链路标识组以外的层2链路标识作为所述UE欲与其他各个UE建立的D2D通信的层2链路标识;
在所述UE与其他各个UE已建立的D2D通信所使用的层2链路标识属于所述已用层2链路标识组时,将该所使用的层2链路标识更换为所述已用层2链路标识组以外的层2链路标识,并将更换后的层2链路标识作为与所述UE进行D2D通信的层2链路标识。
在一个实施例中,进一步包括:
确定所述UE与其他各个UE进行D2D通信所使用的层2链路标识,以及与所述UE进行D2D通信的其他UE所使用的层2链路标识;
广播携带有上述层2链路标识的信息。
在一个实施例中,携带有层2链路标识的信息是以下信息之一或者其组合:
承载在SL-BCH上的广播信息;
承载在SL-DCH上的广播信息;
承载在SL-SCH上的广播信息;
承载在PC5接口传输信道上的RRC消息;
承载在PC5接口传输信道上的NAS消息;
承载在MAC层的MAC PDU上的消息。
本发明实施例提供了一种层2链路标识的通知方法,包括:
确定UE与其他各个UE进行D2D通信所使用的层2链路标识,以及与所述UE进行D2D通信的其他UE所使用的层2链路标识;
广播携带有上述层2链路标识的信息。
在一个实施例中,携带有层2链路标识的信息是以下信息之一或者其组合:
承载在SL-BCH上的广播信息;
承载在SL-DCH上的广播信息;
承载在SL-SCH上的广播信息;
承载在PC5接口传输信道上的RRC消息;
承载在PC5接口传输信道上的NAS消息;
承载在MAC层的MAC PDU上的消息。
本发明实施例提供了一种层2链路标识的选择装置,包括:
接收模块,用于在UE上接收其他UE广播的携带有层2链路标识的信息;
确定模块,用于根据各信息中携带的层2链路标识确定所述已用层2链路标识组,所述已用层2链路标识组是其他UE及与其他UE进行D2D通信的所述UE以外的UE所使用的层2链路标识;
选择模块,用于根据所述已用层2链路标识组,选择所述已用层2链路标识组以外的层2链路标识作为所述UE与其他各个UE进行D2D通信的层2链路标识。
在一个实施例中,选择模块进一步用于:
在确定所述UE与其他各个UE已建立的D2D通信所使用的层2链路标识后,和/或,在确定所述UE欲与其他各个UE建立D2D通信后,按如下方式之一或者其组合执行;
在所述UE欲与其他各个UE建立D2D通信时,选择所述已用层2链路标识组以外的层2链路标识作为所述UE欲与其他各个UE建立的D2D通信的层2链路标识;
在所述UE与其他各个UE已建立的D2D通信所使用的层2链路标识属于所述已用层2链路标识组时,将该所使用的层2链路标识更换为所述已用层2链路标识组以外的层2链路标识,并将更换后的层2链路标识作为与所述UE行D2D通信的层2链路标识。
在一个实施例中,确定模块进一步用于确定所述UE与其他各个UE进行D2D通信所使用的层2链路标识,以及与所述UE进行D2D通信的其他UE所使用的层2链路标识;
进一步包括:广播模块,用于广播携带有上述层2链路标识的信息。
在一个实施例中,携带有层2链路标识的信息是以下信息之一或者其组合:
承载在SL-BCH上的广播信息;
承载在SL-DCH上的广播信息;
承载在SL-SCH上的广播信息;
承载在PC5接口传输信道上的RRC消息;
承载在PC5接口传输信道上的NAS消息;
承载在MAC层的MAC PDU上的消息。
本发明实施例提供了一种层2链路标识的通知装置,包括:
确定模块,用于确定UE与其他各个UE进行D2D通信所使用的层2链路标识,以及与所述UE进行D2D通信的其他UE所使用的层2链路标识;
广播模块,用于广播携带有上述层2链路标识的信息。
在一个实施例中,携带有层2链路标识的信息是以下信息之一或者其组合:
承载在SL-BCH上的广播信息;
承载在SL-DCH上的广播信息;
承载在SL-SCH上的广播信息;
承载在PC5接口传输信道上的RRC消息;
承载在PC5接口传输信道上的NAS消息;
承载在MAC层的MAC PDU上的消息。
本发明实施例提供了一种UE,包括:
处理器,用于读取存储器中的程序,执行下列过程:
根据各信息中携带的层2链路标识确定所述已用层2链路标识组,所述已用层2链路标识组是其他UE及与其他UE进行D2D通信的所述UE以外的UE所使用的层2链路标识;
根据所述已用层2链路标识组,选择所述已用层2链路标识组以外的层2链路标识作为所述UE与其他各个UE进行D2D通信的层2链路标识;
收发机,用于在处理器的控制下收发数据,执行下列过程:
接收其他UE广播的携带有层2链路标识的信息。
在一个实施例中,根据所述已用层2链路标识组,选择所述已用层2链路标识组以外的层2链路标识作为所述UE与其他各个UE进行D2D通信的层2链路标识时,处理器用于:
在确定所述UE与其他各个UE已建立的D2D通信所使用的层2链路标识后,和/或,在确定所述UE欲与其他各个UE建立D2D通信后,按如下方式之一或者其组合执行;
在所述UE欲与其他各个UE建立D2D通信时,选择所述已用层2链路标识组以外的层2链路标识作为所述UE欲与其他各个UE建立的D2D通信的层2链路标识;
在所述UE与其他各个UE已建立的D2D通信所使用的层2链路标识属于所述已用层2链路标识组时,将该所使用的层2链路标识更换为所述已用层2链路标识组以外的层2链路标识,并将更换后的层2链路标识作为与所述UE进行D2D通信的层2链路标识。
在一个实施例中,处理器进一步用于:
确定所述UE与其他各个UE进行D2D通信所使用的层2链路标识,以及与所述UE进行D2D通信的其他UE所使用的层2链路标识;
收发机进一步用于:
广播携带有上述层2链路标识的信息。
在一个实施例中,携带有层2链路标识的信息是以下信息之一或者其组合:
承载在SL-BCH上的广播信息;
承载在SL-DCH上的广播信息;
承载在SL-SCH上的广播信息;
承载在PC5接口传输信道上的RRC消息;
承载在PC5接口传输信道上的NAS消息;
承载在MAC层的MAC PDU上的消息。
本实施例提供另一种UE,包括:
处理器,用于读取存储器中的程序,执行下列过程:
确定所述UE与其他各个UE进行D2D通信所使用的层2链路标识,以及与所述UE进行D2D通信的其他UE所使用的层2链路标识;
收发机,用于在处理器的控制下发送数据,执行下列过程:
广播携带有上述层2链路标识的信息。
在一个实施例中,携带有层2链路标识的信息是以下信息之一或者其组合:
承载在SL-BCH上的广播信息;
承载在SL-DCH上的广播信息;
承载在SL-SCH上的广播信息;
承载在PC5接口传输信道上的RRC消息;
承载在PC5接口传输信道上的NAS消息;
承载在MAC层的MAC PDU上的消息。
本发明有益效果如下:
本发明实施例提供的技术方案中,在层2链路标识的通知方案中,每个UE会广播UE与其他各个UE进行D2D通信所使用的层2链路标识,以及与该UE进行D2D通信的其他UE所使用的层2链路标识。
而在层2链路标识的选择方案中,每个UE会接收其他UE广播的携带有层2链路标识的信息;并据此选择所述已用层2链路标识组以外的层2链路标识作为UE与其他各个UE进行D2D通信的层2链路标识。
由于UE总能通过广播获知以及告知其他可以与之进行D2D通信的UE所使用的层2链路标识,并据此选择使用不冲突的、唯一的层2链路标识,从而给出了PC5接口UE标识冲突检测的方案,在现有D2D通信机制的基础上,为接入层的一对一通信提供了解决方案,保证了UE与其他UE进行D2D通信时所使用的层2链路标识的唯一性,避免了多个UE使用相同的UE标识造成的数据收发错误的问题。
附图说明
此处所说明的附图用来提供对本发明的进一步理解,构成本发明的一部分,本发明的示意性实施例及其说明用于解释本发明,并不构成对本发明的不当限定。在附图中:
图1为本发明实施例中D2D发现/通信结构示意图;
图2为本发明实施例中SL-SCH MAC subheader示意图;
图3为本发明实施例中为PC5接口一对一通信中发生UE标识冲突的场景示意图;
图4为本发明实施例中层2链路标识的通知方法实施流程示意图;
图5为本发明实施例中层2链路标识的选择方法实施流程示意图;
图6为本发明实施例中MAC PDU对应的MAC subheader结构示意图;
图7为本发明实施例中MAC PDU格式示意图;
图8为本发明实施例中一对一通信发起前层2链路标识选择的通信场景示意图;
图9为本发明实施例中一对一通信过程中发现层2链路标识冲突的通信场景示意图;
图10为本发明实施例中层2链路标识的选择装置结构示意图;
图11为本发明实施例中层2链路标识的通知装置结构示意图;
图12为本发明实施例中UE一结构示意图;
图13为本发明实施例中UE二结构示意图。
具体实施方式
为使本发明实施例的目的、技术方案和优点更加清楚,下面将结合本发明实施例中的附图,对本发明实施例中的技术方案进行清楚、完整地描述,显然,所描述的实施例是本发明一部分实施例,而不是全部的实施例。基于本发明中的实施例,本领域普通技术人员在没有作出创造性劳动前提下所获得的所有其他实施例,都属于本发明保护的范围。
应理解,本发明的技术方案可以应用于各种通信系统,例如:全球移动通讯(Global System of Mobile communication,GSM)系统、码分多址(Code Division Multiple Access,CDMA)系统、宽带码分多址(Wideband Code Division Multiple Access,WCDMA)系统、通用分组无线业务(General Packet Radio Service,GPRS)、长期演进(Long Term Evolution,LTE)系统、先进的长期演进(Advanced long term evolution,LTE-A)系统、通用移动通信系统(Universal Mobile Telecommunication System,UMTS)等。
还应理解,在本发明实施例中,用户设备(User Equipment,UE)包括但不限于移动台(Mobile Station,MS)、移动终端(Mobile Terminal)、移动电话(Mobile Telephone)、手机(handset)及便携设备(portable equipment)等,该用户设备可以经无线接入网(Radio Access Network,RAN)与一个或多个核心网进行通信,例如,用户设备可以是移动电话(或称为“蜂窝”电话)、具有无线通信功能的计算机等,用户设备还可以是便携式、袖珍式、手持式、计算机内置的或者车载的移动装置。
下面结合附图对本发明的具体实施方式进行说明。
设备到设备(Device-to-Device,D2D),即终端直通技术,是指邻近的终端可以在近距离范围内通过直连链路进行数据传输的方式,不需要通过中心节点(即基站)进行转发,也不需要通过传统的蜂窝链路进行UE间的信息传输。
图1为D2D发现/通信结构示意图,如图所示,3GPP中,D2D接近服务技术包括以下两大类:
D2D发现:UE使用演进的全球地面无线接入网(Evolution-Universal Terrestrial Radio Access Network,E-UTRA)来确认另外一个UE在其附近。例如,D2D UE可以使用该服务来寻找附近的出租车、寻找在其附近的朋友等;
D2D通信:相互接近的UE,通过在两个UE之间直接建立链路,将原本通过网络传输的通信链路转化为本地的直接通信链路,节省了大量的带宽和网络效率;或者两个相互接近的UE,可以利用直接链路通信来获得稳定高速低廉的通信服务。接近服务通信一般是在网络侧控制或者辅助下进行的,演进基站(eNB)甚至可能会为进行接近服务通信的UE动态的分配资源。
为了便于描述,在本发明实施例中定义两种链路类型为:
D2D链路:指设备和设备之间直接进行通信的链路;
D2N链路:设备和网络节点之间进行通信的链路。
此外,参与D2D发现/通信的UE分为两种角色:
D2D发送UE:即发送D2D发现/通信消息的UE;
D2D接收UE:即接收D2D发送UE发送的发现/通信消息的UE。
图2为直通链路共享信道(Sidelink Shared Channel,SL-SCH)MAC子头(subheader)示意图,如图所示,在PC5接口通信的寻址过程中,UE在PC5接口通过数据包中MAC子头中携带的源地址(Source,SRC)和目的地址(Destination,DST)结合物理层的信道扰码确定PC5口数据的发送方和接收方。
其中SRC为24bits,其值等于邻近业务密钥管理功能(Proximity-based Services Key Management Function)分配的ProSe用户设备标识(ProSe UE ID),其中,Proximity-based Services又可简称ProSe。在一个组内唯一标识一个UE。DST为16bits,其值等于ProSe Function分配的ProSe层2组标识(ProSe Layer-2Group ID)高16位,唯一标识一个组,如果UE脱网,则ProSe Layer-2Group ID使用预配置值。ProSe Layer-2Group ID的低8位即作为PC5接口的物理层的信道扰码。
PC5接口基于以上方式实现一对多的D2D通信。
图3为PC5接口一对一通信中发生UE标识冲突的场景示意图,如图所示,在PC5接口一对一通信中发生UE标识冲突的场景中,从UE1的角度出发,说明UE标识冲突可能发生的场景。最内层的空白区域为UE1可以直接进行D2D通信的区域,也就是说UE1可以与UE2建立直接的PC5口链路。第二层的点状区域为不能与UE1直接进行D2D通信的区域,但位于点状区域的UE可以直接与位于空白区域的某个UE进行直接的D2D通信,例如UE3可以与UE2直接通信。第三层的网格状区域为点状区域外的所有区域,其特点 是其中的UE既不能与UE1直接通信,也不能与空白区域的任何UE进行直接的D2D通信。
在UE标识冲突检测中,UE1不能与位于空白区域的UE发生标识碰撞,也不能与点状区域的UE发生标识碰撞,但UE1可以与位于网格状区域的UE使用相同的标识,因为UE1与网格状区域的UE没有共同的直接通信对象,因此互相之间不会造成数据收发的误判。
也即,在一对多通信中,用于标识UE的SRC(ProSe UE ID)是由ProSe Key Management Function分配的,且能够确保在一个组内是唯一的,因此UE不需要进行UE标识冲突检测。
但发明人注意到:
随着中继(Relay)、关键任务的推动对话(Mission Critical Push To Talk,MCPTT)等功能的引入,要求接入层能提供一对一的通信,一对一通信中使用UE标识作为源和目的地址,UE标识可以是全球唯一(需要较长的位数)或在一定范围内唯一(不需要太长的位数)2种方式,针对在一定范围唯一的方式,UE就需要进行标识冲突检测了,因为如果出现冲突,会导致多个UE使用相同的UE标识造成数据收发错误。但由于现有技术并不需要进行UE标识冲突检测,所以现有技术中也就不存在进行UE标识冲突检测的方案。
基于此,本发明实施例中将给出PC5接口UE标识冲突检测的方案,用以保证UE与其他UE进行D2D通信时所使用的层2链路标识的唯一性,从而避免多个UE使用相同的UE标识造成的数据收发错误的问题。下面进行说明。
本发明实施例提供的技术方案中,一方面,UE会广播自身使用的层2链路标识;另一方面,也会监听其他UE所使用的层2链路标识,以进行冲突检测,从而保证层2链路标识的唯一性。相应的,下面实施例中将分别提供UE广播自身使用的层2链路标识的方案,以及监听其他UE所使用的层2链路标识进行冲突检测的方案。容易理解,在同一UE上可以同时是采用这两个方案,也可以一个UE仅采用其中一个方案。显然,每一个UE总是在采用其中一个方案时,与采用另一个方案的UE相配合以保证层2链路标识的唯一性。
图4为层2链路标识的通知方法实施流程示意图,如图所示,包括:
步骤401、确定UE与其他各个UE进行D2D通信所使用的层2链路标识,以及与该UE进行D2D通信的其他UE所使用的层2链路标识;
步骤402、广播携带有上述层2链路标识的信息。
图5为层2链路标识的选择方法实施流程示意图,如图所示,包括:
步骤501、在UE上接收其他UE广播的携带有层2链路标识的信息;
步骤502、根据各信息中携带的层2链路标识确定所述已用层2链路标识组,所述已用层2链路标识组是其他UE及与其他UE进行D2D通信的该UE以外的UE所使用的层2链路标识;
步骤503、根据所述已用层2链路标识组,选择所述已用层2链路标识组以外的层2链路标识作为UE与其他各个UE进行D2D通信的层2链路标识。
实施中,在步骤402与步骤501中,携带有层2链路标识的信息可以是以下信息之一或者其组合:
承载在直通链路广播信道(Sidelink Broadcast Channel,SL-BCH)上的广播信息;
承载在直通链路专用传输信道(Sidelink Discovery Channel,SL-DCH)上的广播信息;
承载在直通链路共享信道(Sidelink Shared Channel,SL-SCH)上的广播信息;
承载在PC5接口传输信道上的无线资源控制(Radio Resource Control,RRC)消息;
承载在PC5接口传输信道上的非接入层(Non Access Stratum,NAS)消息;
承载在MAC层的MAC协议数据单元(Protocol Data Unit,MAC PDU)上的消息。
具体的,层2标识广播信息可以承载在SL-BCH或SL-DCH或SL-SCH或其他任何PC5接口传输信道上的RRC或NAS消息,也可以是一个MAC层的MAC PDU。
图6为MAC PDU对应的MAC subheader结构示意图,图7为MAC PDU格式示意图,以MAC PDU为例,其对应的MAC子头和MAC PDU格式可以是如图6所示。为了和其他MAC PDU区分,可以引入新的逻辑信道标识(Logical Channel ID,LCID)。
在图4与图5提供的技术方案配合使用时,本发明实施例给出的PC5接口UE标识冲突检测方案的要点在于,在PC5接口进行D2D收发的UE将自己的层2链路标识(ProSe Layer-2ID)以及与自己进行通信的UE的层2链路标识广播给附近的UE,而每个UE在开始启动与其他UE的一对一通信前,监听一段时间附近UE的层2链路标识广播信息,避免使用与接收到的任何UE层2链路标识相同的UE层2链路标识发起一对一通信。
在通信过程中,UE除了发送UE层2链路标识广播信息(包括自己的层2链路标识以及与自己进行通信的UE的层2链路标识)外,还需要监听附近其他UE发送的UE层2链路标识广播信息,当接收到没有与自己通信的UE广播的UE层2链路标识信息中包含自己使用的UE层2链路标识时,则认为检测到UE层2链路标识冲突。检测到冲突后,UE只需重新选择一个与所有接收到的层2链路标识都不相同的层2链路标识,并通知所有正与自己进行一对一通信的UE即可。进一步的,该UE和其通信对端UE自然需要更新其层2链路标识广播信息。
实施中,步骤503的根据所述已用层2链路标识组,选择所述已用层2链路标识组以外的层2链路标识作为UE与其他各个UE进行D2D通信的层2链路标识,可以包括:
在确定UE与其他各个UE已建立的D2D通信所使用的层2链路标识后,和/或,在确定UE欲与其他各个UE建立D2D通信后,按如下方式之一或者其组合执行;
在UE欲与其他各个UE建立D2D通信时,选择所述已用层2链路标识组以外的层2链路标识作为UE欲与其他各个UE建立的D2D通信的层2链路标识;
在UE与其他各个UE已建立的D2D通信所使用的层2链路标识属于所述已用层2链路标识组时,将该所使用的层2链路标识更换为所述已用层2链路标识组以外的层2链路标识,并将其作为与该UE进行D2D通信的层2链路标识。
实施中,在选择所述已用层2链路标识组以外的层2链路标识作为UE与其他各个UE进行D2D通信的层2链路标识后,为了使其他UE获悉UE使用的层2链路标识的情况,还可以进一步包括:
确定UE与其他各个UE进行D2D通信所使用的层2链路标识,以及与该UE进行D2D通信的其他UE所使用的层2链路标识;
广播携带有上述层2链路标识的信息。
下面以具体实例来进行说明。
实施例1
本实施例用以说明当UE(例中为UE1)希望与另一个UE(例中为UE5)建立D2D通信时,确定该UE层2链路标识的实施过程。也即:
在确定UE欲与其他各个UE建立D2D通信后,在UE欲与其他各个UE建立D2D通信时,选择所述已用层2链路标识组以外的层2链路标识作为UE欲与其他各个UE建立的D2D通信的层2链路标识。
具体的,在一对一通信发起前,在层2链路标识选择时,是在所述已用层2链路标识组以外,选择一个层2链路标识来作为欲与其他UE建立的D2D通信的层2链路标识即可。
图8为一对一通信发起前层2链路标识选择的通信场景示意图,图中所使用的最内层的空白区域、第二层的点状区域、第三层的网格状区域的含义可以参考图3,在图8所示的环境下,假设:
UE5(层2链路标识为L2 ID5)正在与UE2(层2链路标识为L2 ID2)和UE7(层2链路标识为L2 ID7)进行一对一通信;
UE2(层2链路标识为L2 ID2)正在与UE3(层2链路标识为L2 ID3)和UE5(层2链路标识为L2 ID5)进行一对一通信;
UE3(层2链路标识为L2 ID3)正在与UE2(层2链路标识为L2 ID2)和UE4(层2链路标识为L2 ID4)进行一对一通信;
UE1,UE6和UE8没有与其他UE进行通信。
UE2广播的层2链路标识广播信息为:L2 ID2,L2 ID3,L2 ID5;
UE3广播的层2链路标识广播信息为:L2 ID3,L2 ID2,L2 ID4;
UE4广播的层2链路标识广播信息为:L2 ID4,L2 ID3;
UE5广播的层2链路标识广播信息为:L2 ID5,L2 ID2,L2 ID7;
UE7广播的层2链路标识广播信息为:L2 ID7,L2 ID5。
例中,UE1希望发起与UE5的一对一通信,UE1可以接收到UE2和UE5的层2链路标识广播信息,因此UE1可以获知的正在被使用的层2链路标识为:L2 ID2,L2 ID3,L2 ID5,L2 ID7,则,UE1需要避免选择这4个层2链路标识。
具体的,UE1可以将根据接收到的附近UE广播的层2链路标识使用情况,将这些已经被使用的层2标识标记为不可用,其他为可用,并从可用的L2标识中随机选择或者按照一定规则选择一个L2标识。本实施例中UE1选择了L2 ID4作为自己的层2链路标识,并与UE5建立一对一通信。
例中,还可以进一步包括:
确定UE与其他各个UE进行D2D通信所使用的层2链路标识,以及与该UE进行D2D通信的其他UE所使用的层2链路标识;
广播携带有上述层2链路标识的信息。
也即,之后的各UE的层2链路标识广播信息更新为:
UE1广播的层2链路标识广播信息为:L2 ID4,L2 ID5;
UE2广播的层2链路标识广播信息为:L2 ID2,L2 ID3,L2 ID5;
UE3广播的层2链路标识广播信息为:L2 ID3,L2 ID2,L2 ID4;
UE4广播的层2链路标识广播信息为:L2 ID4,L2 ID3;
UE5广播的层2链路标识广播信息为:L2 ID5,L2 ID2,L2 ID7,L2 ID4;
UE7广播的层2链路标识广播信息为:L2 ID7,L2 ID5。
实施例2
本实施例用以说明当某一UE(例中为UE4)发生变化,例如移动后导致层2链路标识发生变化,UE(例中为UE1)与另一个UE(例中为UE5)之间存在D2D通信时,当该UE(例中为UE4)的变动导致UE(例中为UE1)层2链路标识发生冲突后,确定该UE层2链路标识的实施过程。也即:
在UE与其他各个UE已建立的D2D通信所使用的层2链路标识属于所述已用层2链路标识组时,将该所使用的层2链路标识更换为所述已用层2链路标识组以外的层2链路标识,并将其作为与该UE进行D2D通信的层2链路标识。
具体的,在一对一通信过程中,发现层2链路标识冲突后,在层2链路标识选择时,是UE1变更正在使用的层2链路标识,在所述已用层2链路标识组以外,选择一个层2链路标识来作为与UE5建立的D2D通信的层2链路标识即可。
图9为一对一通信过程中发现层2链路标识冲突的通信场景示意图,图中所使用的最内层的空白区域、第二层的点状区域、第三层的网格状区域的含义可以参考图3,在图9所示的环境下,假设一对一通信关系同实施例1。
又假设:UE4移动到点状区域并发起与UE2的一对一通信,之后各UE的层2链路标 识广播信息更新为:
UE1广播的层2链路标识广播信息为:L2 ID4,L2 ID5;
UE2广播的层2链路标识广播信息为:L2 ID2,L2 ID3,L2 ID5,L2 ID4;
UE3广播的层2链路标识广播信息为:L2 ID3,L2 ID2,L2 ID4;
UE4广播的层2链路标识广播信息为:L2 ID4,L2 ID3,L2 ID2;
UE5广播的层2链路标识广播信息为:L2 ID5,L2 ID2,L2 ID7,L2 ID4;
UE7广播的层2链路标识广播信息为:L2 ID7,L2 ID5;
例中,UE1接收UE2和UE5的层2链路标识广播信息后,除了与自己有一对一通信关系的UE(UE5)发送的层2链路标识广播信息中包含自己使用的层2链路标识(L2 ID4)外,与自己没有一对一通信关系的UE(UE2)发送的层2链路标识广播信息中也包含自己使用的层2链路标识(L2 ID4),因而判断发生层2链路标识冲突,则,UE1重新选择一个层2链路标识(L2 ID1),将新的层2链路标识通知给与自己有一对一通信关系的UE(UE5)。
也即,正在进行D2D通信的UE通过检测其他UE广播的层2链路标识,判断是否发生层2链路标识碰撞,当发现自己使用的层2链路标识与其他UE所使用的层2链路标识一样时,将该所使用的层2链路标识更换为所述已用层2链路标识组以外的层2链路标识,将其作为该UE进行D2D通信的层2链路标识,并将新的层2链路标识通知给与其进行D2D通信的UE,更新UE的层2链路标识广播信息。
例中,还可以进一步包括:
确定UE与其他各个UE进行D2D通信所使用的层2链路标识,以及与该UE进行D2D通信的其他UE所使用的层2链路标识;
广播携带有上述层2链路标识的信息。
也即,之后的各UE的层2链路标识广播信息更新为:
UE1广播的层2链路标识广播信息为:L2 ID1,L2 ID5;
UE2广播的层2链路标识广播信息为:L2 ID2,L2 ID3,L2 ID5,L2 ID4;
UE3广播的层2链路标识广播信息为:L2 ID3,L2 ID2,L2 ID4;
UE4广播的层2链路标识广播信息为:L2 ID4,L2 ID3,L2 ID2;
UE5广播的层2链路标识广播信息为:L2 ID5,L2 ID2,L2 ID7,L2 ID1;
UE7广播的层2链路标识广播信息为:L2 ID7,L2 ID5。
基于同一发明构思,本发明实施例中还提供了一种层2链路标识的选择装置、一种层2链路标识的通知装置,由于这些装置解决问题的原理与一种层2链路标识的选择方法、一种层2链路标识的通知方法相似,因此这些装置的实施可以参见方法的实施,重复之处不再赘述。
图10为层2链路标识的选择装置结构示意图,如图所示,可以包括:
接收模块1001,用于在UE上接收其他UE广播的携带有层2链路标识的信息;
确定模块1002,用于根据各信息中携带的层2链路标识确定所述已用层2链路标识组,所述已用层2链路标识组是其他UE及与其他UE进行D2D通信的该UE以外的UE所使用的层2链路标识;
选择模块1003,用于根据所述已用层2链路标识组,选择所述已用层2链路标识组以外的层2链路标识作为所述UE与其他各个UE进行D2D通信的层2链路标识。
实施中,选择模块还可以进一步用于:
在确定所述UE与其他各个UE已建立的D2D通信所使用的层2链路标识后,和/或,在确定所述UE欲与其他各个UE建立D2D通信后,按如下方式之一或者其组合执行;
在所述UE欲与其他各个UE建立D2D通信时,选择所述已用层2链路标识组以外的层2链路标识作为所述UE欲与其他各个UE建立的D2D通信的层2链路标识;
在所述UE与其他各个UE已建立的D2D通信所使用的层2链路标识属于所述已用层2链路标识组时,将该所使用的层2链路标识更换为所述已用层2链路标识组以外的层2链路标识,并将更换后的层2链路标识作为与所述UE进行D2D通信的层2链路标识。
实施中,确定模块还可以进一步用于确定所述UE与其他各个UE进行D2D通信所使用的层2链路标识,以及与该UE进行D2D通信的其他UE所使用的层2链路标识;
则选择装置中还可以进一步包括:
广播模块1004,用于广播携带有上述层2链路标识的信息。
实施中,携带有层2链路标识的信息可以是以下信息之一或者其组合:
承载在SL-BCH上的广播信息;
承载在SL-DCH上的广播信息;
承载在SL-SCH上的广播信息;
承载在PC5接口传输信道上的RRC消息;
承载在PC5接口传输信道上的NAS消息;
承载在MAC层的MAC PDU上的消息。
图11为层2链路标识的通知装置结构示意图,如图所示,可以包括:
确定模块1101,用于确定UE与其他各个UE进行D2D通信所使用的层2链路标识,以及与所述UE进行D2D通信的其他UE所使用的层2链路标识;
广播模块1102,用于广播携带有上述层2链路标识的信息。
实施中,携带有层2链路标识的信息可以是以下信息之一或者其组合:
承载在SL-BCH上的广播信息;
承载在SL-DCH上的广播信息;
承载在SL-SCH上的广播信息;
承载在PC5接口传输信道上的RRC消息;
承载在PC5接口传输信道上的NAS消息;
承载在MAC层的MAC PDU上的消息。
为了描述的方便,以上所述装置的各部分以功能分为各种模块或单元分别描述。当然,在实施本发明时可以把各模块或单元的功能在同一个或多个软件或硬件中实现。
在实施本发明实施例提供的技术方案时,可以按如下方式实施。
图12为UE一结构示意图,如图所示,UE包括:
处理器1200,用于读取存储器1220中的程序,执行下列过程:
根据各信息中携带的层2链路标识确定所述已用层2链路标识组,所述已用层2链路标识组是其他UE及与其他UE进行D2D通信的所述UE以外的UE所使用的层2链路标识;
根据所述已用层2链路标识组,选择所述已用层2链路标识组以外的层2链路标识作为所述UE与其他各个UE进行D2D通信的层2链路标识。
收发机1210,用于在处理器1200的控制下收发数据,执行下列过程:
接收其他UE广播的携带有层2链路标识的信息。
实施中,根据所述已用层2链路标识组,选择所述已用层2链路标识组以外的层2链路标识作为所述UE与其他各个UE进行D2D通信的层2链路标识时,处理器1200用于:
在确定所述UE与其他各个UE已建立的D2D通信所使用的层2链路标识后,和/或,在确定所述UE欲与其他各个UE建立D2D通信后,按如下方式之一或者其组合执行;
在所述UE欲与其他各个UE建立D2D通信时,选择所述已用层2链路标识组以外的层2链路标识作为所述UE欲与其他各个UE建立的D2D通信的层2链路标识;
在所述UE与其他各个UE已建立的D2D通信所使用的层2链路标识属于所述已用层2链路标识组时,将该所使用的层2链路标识更换为所述已用层2链路标识组以外的层2链路标识,并将更换后的层2链路标识作为与所述UE进行D2D通信的层2链路标识。
实施中,处理器1200还可以进一步用于:
确定所述UE与其他各个UE进行D2D通信所使用的层2链路标识,以及与所述UE进行D2D通信的其他UE所使用的层2链路标识;
收发机1210还可以进一步用于:
广播携带有上述层2链路标识的信息。
实施中,携带有层2链路标识的信息是以下信息之一或者其组合:
承载在SL-BCH上的广播信息;
承载在SL-DCH上的广播信息;
承载在SL-SCH上的广播信息;
承载在PC5接口传输信道上的RRC消息;
承载在PC5接口传输信道上的NAS消息;
承载在MAC层的MAC PDU上的消息。
其中,在图12中,总线架构可以包括任意数量的互联的总线和桥,具体由处理器1200代表的一个或多个处理器和存储器1220代表的存储器的各种电路链接在一起。总线架构还可以将诸如外围设备、稳压器和功率管理电路等之类的各种其他电路链接在一起,这些都是本领域所公知的,因此,本文不再对其进行进一步描述。总线接口提供接口。收发机1210可以是多个元件,即包括发送机和接收机,提供用于在传输介质上与各种其他装置通信的单元。针对不同的用户设备,用户接口1230还可以是能够外接内接需要设备的接口,连接的设备包括但不限于小键盘、显示器、扬声器、麦克风、操纵杆等。
处理器1200负责管理总线架构和通常的处理,存储器1220可以存储处理器1200在执行操作时所使用的数据。
图13为UE二结构示意图,如图所示,UE包括:
处理器1300,用于读取存储器1320中的程序,执行下列过程:
确定所述UE与其他各个UE进行D2D通信所使用的层2链路标识,以及与所述UE进行D2D通信的其他UE所使用的层2链路标识;
收发机1310,用于在处理器1300的控制下发送数据,执行下列过程:
广播携带有上述层2链路标识的信息。
实施中,携带有层2链路标识的信息是以下信息之一或者其组合:
承载在SL-BCH上的广播信息;
承载在SL-DCH上的广播信息;
承载在SL-SCH上的广播信息;
承载在PC5接口传输信道上的RRC消息;
承载在PC5接口传输信道上的NAS消息;
承载在MAC层的MAC PDU上的消息。
其中,在图13中,总线架构可以包括任意数量的互联的总线和桥,具体由处理器1300代表的一个或多个处理器和存储器1320代表的存储器的各种电路链接在一起。总线架构还可以将诸如外围设备、稳压器和功率管理电路等之类的各种其他电路链接在一起,这些都是本领域所公知的,因此,本文不再对其进行进一步描述。总线接口提供接口。收发机1310可以是多个元件,即包括发送机和接收机,提供用于在传输介质上与各种其他装置通信的单元。针对不同的用户设备,用户接口1330还可以是能够外接内接需要设备的接口,连接的设备包括但不限于小键盘、显示器、扬声器、麦克风、操纵杆等。
处理器1300负责管理总线架构和通常的处理,存储器1320可以存储处理器1300在执行操作时所使用的数据。
综上所述,在本发明实施例提供的技术方案中,在PC5接口进行D2D收发的UE将自己的层2链路标识以及与自己进行通信的UE的层2链路标识广播给附近的UE,而每个UE通过发起通信前的层2链路标识监听及通信过程中的层2链路标识碰撞检测实现层2链路标识的冲突避免和解决。具体包括如下方案:
进行一对一通信的UE广播自己和与自己进行通信的UE的层2链路标识。
UE在发起与其他UE的一对一通信前,先读取附近UE的层2链路标识广播信息,选择与接收到的层2链路标识不同的层2链路标识。
UE在通信过程中继续监听周围UE的层2链路标识广播信息,当接收到非与自己通信的UE广播的UE层2链路标识信息中包含自己使用的UE层2链路标识,则认为检测到UE层2链路标识冲突。
UE判断发生层2链路标识冲突后,选择一个新的与所有接收到的层2链路标识不同的层2链路标识,并将新层2链路标识通知给与自己进行通信的UE。
变更层2链路标识的UE及与之进行通信的UE更新层2链路标识广播信息。
UE可以维护层2链路标识占用情况的数据库,根据接收到的附近UE广播的层2链路标识更新该数据库,将接收到的层2链路标识标为不可用,当UE需要生成层2链路标识时,可以从可用的层2链路标识中生成。
UE发送的层2链路标识广播信息可以是承载在SL-BCH或SL-DCH或SL-SCH或其他任何PC5接口传输信道上的RRC或NAS消息,也可以是一个MAC层的MAC PDU。
本发明实施例提供了一种PC5接口UE标识的冲突避免和碰撞解决方案,从而在现有D2D通信机制的基础上,为接入层的一对一通信提供了解决方案。
本领域内的技术人员应明白,本发明的实施例可提供为方法、系统、或计算机程序产品。因此,本发明可采用完全硬件实施例、完全软件实施例、或结合软件和硬件方面的实施例的形式。而且,本发明可采用在一个或多个其中包含有计算机可用程序代码的计算机可用存储介质(包括但不限于磁盘存储器、CD-ROM、光学存储器等)上实施的计算机程序产品的形式。
本发明是参照根据本发明实施例的方法、设备(系统)、和计算机程序产品的流程图和/或方框图来描述的。应理解可由计算机程序指令实现流程图和/或方框图中的每一流程和/或方框、以及流程图和/或方框图中的流程和/或方框的结合。可提供这些计算机程序指令到通用计算机、专用计算机、嵌入式处理机或其他可编程数据处理设备的处理器以产生一个机器,使得通过计算机或其他可编程数据处理设备的处理器执行的指令产生用于实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能的 装置。
这些计算机程序指令也可存储在能引导计算机或其他可编程数据处理设备以特定方式工作的计算机可读存储器中,使得存储在该计算机可读存储器中的指令产生包括指令装置的制造品,该指令装置实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能。
这些计算机程序指令也可装载到计算机或其他可编程数据处理设备上,使得在计算机或其他可编程设备上执行一系列操作步骤以产生计算机实现的处理,从而在计算机或其他可编程设备上执行的指令提供用于实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能的步骤。
尽管已描述了本发明的优选实施例,但本领域内的技术人员一旦得知了基本创造性概念,则可对这些实施例作出另外的变更和修改。所以,所附权利要求意欲解释为包括优选实施例以及落入本发明范围的所有变更和修改。
显然,本领域的技术人员可以对本发明实施例进行各种改动和变型而不脱离本发明实施例的精神和范围。这样,倘若本发明实施例的这些修改和变型属于本发明权利要求及其等同技术的范围之内,则本发明也意图包含这些改动和变型在内。

Claims (18)

  1. 一种层2链路标识的选择方法,其特征在于,包括:
    在用户设备UE上接收其他UE广播的携带有层2链路标识的信息;
    根据各信息中携带的层2链路标识确定已用层2链路标识组,所述已用层2链路标识组是其他UE及与其他UE进行设备到设备D2D通信的所述UE以外的UE所使用的层2链路标识;
    根据所述已用层2链路标识组,选择所述已用层2链路标识组以外的层2链路标识作为所述UE与其他各个UE进行D2D通信的层2链路标识。
  2. 根据权利要求1所述的方法,其特征在于,根据所述已用层2链路标识组,选择所述已用层2链路标识组以外的层2链路标识作为所述UE与其他各个UE进行D2D通信的层2链路标识,包括:
    在确定所述UE与其他各个UE已建立的D2D通信所使用的层2链路标识后,和/或,在确定所述UE欲与其他各个UE建立D2D通信后,按如下方式之一或者其组合执行;
    在所述UE欲与其他各个UE建立D2D通信时,选择所述已用层2链路标识组以外的层2链路标识作为所述UE欲与其他各个UE建立的D2D通信的层2链路标识;
    在所述UE与其他各个UE已建立的D2D通信所使用的层2链路标识属于所述已用层2链路标识组时,将该所使用的层2链路标识更换为所述已用层2链路标识组以外的层2链路标识,并将更换后的层2链路标识作为与所述UE进行D2D通信的层2链路标识。
  3. 根据权利要求1或2所述的方法,其特征在于,进一步包括:
    确定所述UE与其他各个UE进行D2D通信所使用的层2链路标识,以及与所述UE进行D2D通信的其他UE所使用的层2链路标识;
    广播携带有上述层2链路标识的信息。
  4. 根据权利要求3所述的方法,其特征在于,携带有层2链路标识的信息是以下信息之一或者其组合:
    承载在直通链路广播信道SL-BCH上的广播信息;
    承载在直通链路专用传输信道SL-DCH上的广播信息;
    承载在直通链路共享信道SL-SCH上的广播信息;
    承载在PC5接口传输信道上的无线资源控制RRC消息;
    承载在PC5接口传输信道上的非接入层NAS消息;
    承载在媒体接入控制MAC层的MAC协议数据单元PDU上的消息。
  5. 一种层2链路标识的通知方法,其特征在于,包括:
    确定UE与其他各个UE进行D2D通信所使用的层2链路标识,以及与所述UE进行D2D通信的其他UE所使用的层2链路标识;
    广播携带有上述层2链路标识的信息。
  6. 根据权利要求5所述的方法,其特征在于,携带有层2链路标识的信息是以下信息之一或者其组合:
    承载在SL-BCH上的广播信息;
    承载在SL-DCH上的广播信息;
    承载在SL-SCH上的广播信息;
    承载在PC5接口传输信道上的RRC消息;
    承载在PC5接口传输信道上的NAS消息;
    承载在MAC层的MAC PDU上的消息。
  7. 一种层2链路标识的选择装置,其特征在于,包括:
    接收模块,用于在UE上接收其他UE广播的携带有层2链路标识的信息;
    确定模块,用于根据各信息中携带的层2链路标识确定所述已用层2链路标识组,所述已用层2链路标识组是其他UE及与其他UE进行D2D通信的所述UE以外的UE所使用的层2链路标识;
    选择模块,用于根据所述已用层2链路标识组,选择所述已用层2链路标识组以外的层2链路标识作为所述UE与其他各个UE进行D2D通信的层2链路标识。
  8. 根据权利要求7所述的装置,其特征在于,选择模块进一步用于:
    在确定所述UE与其他各个UE已建立的D2D通信所使用的层2链路标识后,和/或,在确定所述UE欲与其他各个UE建立D2D通信后,按如下方式之一或者其组合执行;
    在所述UE欲与其他各个UE建立D2D通信时,选择所述已用层2链路标识组以外的层2链路标识作为所述UE欲与其他各个UE建立的D2D通信的层2链路标识;
    在所述UE与其他各个UE已建立的D2D通信所使用的层2链路标识属于所述已用层2链路标识组时,将该所使用的层2链路标识更换为所述已用层2链路标识组以外的层2链路标识,并将更换后的层2链路标识作为与所述UE进行D2D通信的层2链路标识。
  9. 根据权利要求7或8所述的装置,其特征在于,
    确定模块进一步用于确定所述UE与其他各个UE进行D2D通信所使用的层2链路标识,以及与所述UE进行D2D通信的其他UE所使用的层2链路标识;
    进一步包括:广播模块,用于广播携带有上述层2链路标识的信息。
  10. 根据权利要求9所述的装置,其特征在于,携带有层2链路标识的信息是以下信息之一或者其组合:
    承载在SL-BCH上的广播信息;
    承载在SL-DCH上的广播信息;
    承载在SL-SCH上的广播信息;
    承载在PC5接口传输信道上的RRC消息;
    承载在PC5接口传输信道上的NAS消息;
    承载在MAC层的MAC PDU上的消息。
  11. 一种层2链路标识的通知装置,其特征在于,包括:
    确定模块,用于确定UE与其他各个UE进行D2D通信所使用的层2链路标识,以及与所述UE进行D2D通信的其他UE所使用的层2链路标识;
    广播模块,用于广播携带有上述层2链路标识的信息。
  12. 根据权利要求11所述的装置,其特征在于,携带有层2链路标识的信息是以下信息之一或者其组合:
    承载在SL-BCH上的广播信息;
    承载在SL-DCH上的广播信息;
    承载在SL-SCH上的广播信息;
    承载在PC5接口传输信道上的RRC消息;
    承载在PC5接口传输信道上的NAS消息;
    承载在MAC层的MAC PDU上的消息。
  13. 一种用户设备UE,其特征在于,包括:
    处理器,用于读取存储器中的程序,执行下列过程:
    根据各信息中携带的层2链路标识确定已用层2链路标识组,所述已用层2链路标识组是其他UE及与其他UE进行D2D通信的所述UE以外的UE所使用的层2链路标识;
    根据所述已用层2链路标识组,选择所述已用层2链路标识组以外的层2链路标识作为所述UE与其他各个UE进行D2D通信的层2链路标识;
    收发机,用于在处理器的控制下收发数据,执行下列过程:
    接收其他UE广播的携带有层2链路标识的信息。
  14. 根据权利要求13所述的UE,其特征在于,根据所述已用层2链路标识组,选择所述已用层2链路标识组以外的层2链路标识作为所述UE与其他各个UE进行D2D通信的层2链路标识时,处理器用于:
    在确定所述UE与其他各个UE已建立的D2D通信所使用的层2链路标识后,和/或,在确定所述UE欲与其他各个UE建立D2D通信后,按如下方式之一或者其组合执行;
    在所述UE欲与其他各个UE建立D2D通信时,选择所述已用层2链路标识组以外的层2链路标识作为所述UE欲与其他各个UE建立的D2D通信的层2链路标识;
    在所述UE与其他各个UE已建立的D2D通信所使用的层2链路标识属于所述已用层2链路标识组时,将该所使用的层2链路标识更换为所述已用层2链路标识组以外的层2链路标识,并将更换后的层2链路标识作为与所述UE进行D2D通信的层2链路标识。
  15. 根据权利要求13或14所述的UE,其特征在于,处理器进一步用于:
    确定所述UE与其他各个UE进行D2D通信所使用的层2链路标识,以及与所述UE进行D2D通信的其他UE所使用的层2链路标识;
    收发机进一步用于:
    广播携带有上述层2链路标识的信息。
  16. 根据权利要求15所述的UE,其特征在于,携带有层2链路标识的信息是以下信息之一或者其组合:
    承载在SL-BCH上的广播信息;
    承载在SL-DCH上的广播信息;
    承载在SL-SCH上的广播信息;
    承载在PC5接口传输信道上的RRC消息;
    承载在PC5接口传输信道上的NAS消息;
    承载在MAC层的MAC PDU上的消息。
  17. 一种用户设备UE,其特征在于,包括:
    处理器,用于读取存储器中的程序,执行下列过程:
    确定所述UE与其他各个UE进行D2D通信所使用的层2链路标识,以及与所述UE进行D2D通信的其他UE所使用的层2链路标识;
    收发机,用于在处理器的控制下发送数据,执行下列过程:
    广播携带有上述层2链路标识的信息。
  18. 根据权利要求17所述的UE,其特征在于,携带有层2链路标识的信息是以下信息之一或者其组合:
    承载在SL-BCH上的广播信息;
    承载在SL-DCH上的广播信息;
    承载在SL-SCH上的广播信息;
    承载在PC5接口传输信道上的RRC消息;
    承载在PC5接口传输信道上的NAS消息;
    承载在MAC层的MAC PDU上的消息。
PCT/CN2016/085611 2015-06-19 2016-06-13 一种层2链路标识的选择、通知方法及装置 Ceased WO2016202227A1 (zh)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201510346634.7 2015-06-19
CN201510346634.7A CN106331978B (zh) 2015-06-19 2015-06-19 一种层2链路标识的选择、通知方法及装置

Publications (1)

Publication Number Publication Date
WO2016202227A1 true WO2016202227A1 (zh) 2016-12-22

Family

ID=57544891

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2016/085611 Ceased WO2016202227A1 (zh) 2015-06-19 2016-06-13 一种层2链路标识的选择、通知方法及装置

Country Status (2)

Country Link
CN (1) CN106331978B (zh)
WO (1) WO2016202227A1 (zh)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111132073A (zh) * 2018-11-13 2020-05-08 维沃移动通信有限公司 多播通信链路层标识符更新方法、装置及终端设备
CN114640723A (zh) * 2020-11-30 2022-06-17 上海朗帛通信技术有限公司 一种被用于无线通信的方法和设备

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018176227A1 (zh) * 2017-03-28 2018-10-04 华为技术有限公司 数据处理方法和装置
CN109548076B (zh) 2017-08-02 2020-12-08 华为技术有限公司 数据重复传输方法和设备
EP3782383A4 (en) 2018-05-11 2021-03-10 Samsung Electronics Co., Ltd. METHOD AND SYSTEM FOR HANDLING DYNAMIC GROUP FORMATION IN A V2X SYSTEM
JP6749462B2 (ja) * 2018-11-09 2020-09-02 華碩電腦股▲ふん▼有限公司 無線通信システムにおいてサイドリンク通信のための接続を改善する方法および装置
CN111867146B (zh) * 2019-04-30 2022-07-22 大唐移动通信设备有限公司 一种标识信息发送、接收方法、设备及装置
CN114208227B (zh) * 2019-10-31 2024-08-30 Oppo广东移动通信有限公司 无线通信的方法和终端设备
KR102345732B1 (ko) * 2020-03-18 2021-12-31 아서스테크 컴퓨터 인코포레이션 무선 통신 시스템에서 사이드링크 식별자 변경을 위한 방법 및 장치
US11611853B2 (en) * 2020-03-31 2023-03-21 Qualcomm Incorporated Sidelink group management for transmit power controlled group communications
CN113825108B (zh) * 2020-06-18 2022-11-22 华硕电脑股份有限公司 无线通信系统中用户设备传送直接通信请求消息的方法和设备
CN113825204A (zh) * 2020-06-18 2021-12-21 华硕电脑股份有限公司 无线通信系统中执行pc5单播链路建立过程的方法和设备
EP4221438A4 (en) * 2020-10-23 2023-11-29 Huawei Technologies Co., Ltd. COMMUNICATION METHOD AND DEVICE

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008147161A1 (en) * 2007-06-01 2008-12-04 Samsung Electronics Co., Ltd. Apparatus and method for allocating connection identifier in communication system
CN101690044A (zh) * 2007-07-10 2010-03-31 高通股份有限公司 生成并维护用于无线网络的正交连接标识(cid)的装置和方法
CN103298134A (zh) * 2012-02-22 2013-09-11 华为技术有限公司 多终端竞争冲突解决方法,终端和基站
CN103329610A (zh) * 2010-12-10 2013-09-25 高通股份有限公司 用于无线对等通信网络中的资源冲突检测的方法和装置

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104113831A (zh) * 2014-07-26 2014-10-22 华为技术有限公司 近距离业务通讯的计费方法、系统及相关设备

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008147161A1 (en) * 2007-06-01 2008-12-04 Samsung Electronics Co., Ltd. Apparatus and method for allocating connection identifier in communication system
CN101690044A (zh) * 2007-07-10 2010-03-31 高通股份有限公司 生成并维护用于无线网络的正交连接标识(cid)的装置和方法
CN103329610A (zh) * 2010-12-10 2013-09-25 高通股份有限公司 用于无线对等通信网络中的资源冲突检测的方法和装置
CN103298134A (zh) * 2012-02-22 2013-09-11 华为技术有限公司 多终端竞争冲突解决方法,终端和基站

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111132073A (zh) * 2018-11-13 2020-05-08 维沃移动通信有限公司 多播通信链路层标识符更新方法、装置及终端设备
CN111132073B (zh) * 2018-11-13 2024-03-01 维沃移动通信有限公司 多播通信链路层标识符更新方法、装置及终端设备
CN114640723A (zh) * 2020-11-30 2022-06-17 上海朗帛通信技术有限公司 一种被用于无线通信的方法和设备
CN114640723B (zh) * 2020-11-30 2024-06-11 上海朗帛通信技术有限公司 一种被用于无线通信的方法和设备

Also Published As

Publication number Publication date
CN106331978B (zh) 2019-09-17
CN106331978A (zh) 2017-01-11

Similar Documents

Publication Publication Date Title
WO2016202227A1 (zh) 一种层2链路标识的选择、通知方法及装置
EP3146776B1 (en) Devices and methods for d2d transmission
CN105992364B (zh) 资源处理方法及装置
EP3014908B1 (en) Communications in an ad-hoc multicast network
CN109716700B (zh) 一种指示方法及相关设备
CN104285457B (zh) 网络协助的设备至设备(d2d)通信的信标管理
CN108307528B (zh) 一种信息传输方法、装置及系统
CN105578382B (zh) 资源的获取、配置方法及装置,资源池的配置方法及装置
WO2018201687A1 (zh) 一种信令传输方法及设备、计算机可读存储介质
WO2016161867A1 (zh) 终端直通中继节点的确定、使用方法及装置
WO2014161383A1 (zh) 接收设备发现信息、发送设备发现信息的方法和用户设备
CN104811892A (zh) 一种资源分配方法、装置及系统
WO2017028610A1 (zh) 设备到设备标识冲突的解决方法、设备到设备用户设备
CN107005851A (zh) 一种设备到设备d2d通信方法、装置及系统
WO2015139391A1 (zh) 蜂窝通信和d2d通信共存的方法、系统、装置、存储介质
WO2016161623A1 (zh) 发现信号的传输方法、装置以及通信系统
WO2017024909A1 (zh) 一种进行数据传输的方法和设备
WO2016173310A1 (zh) 资源的配置方法及装置
CN105704641B (zh) 设备到设备d2d数据传输方法、装置及d2d ue
WO2016141636A1 (zh) 一种实现d2d通信的方法、系统及设备
CN106612554B (zh) 分配时域资源的方法、基站和用户设备
WO2015055142A1 (zh) 发现信号的发送和接收方法、以及发送和接收装置
JP7820552B2 (ja) 通信方法及び装置、並びに記憶媒体
WO2022061776A1 (zh) 确定资源集合的方法和终端设备
CN106454693A (zh) D2d ue控制方法、装置、基站及d2d ue

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 16810968

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 16810968

Country of ref document: EP

Kind code of ref document: A1