WO2015157912A1 - 数据传输方法、发送端设备与接收端设备 - Google Patents

数据传输方法、发送端设备与接收端设备 Download PDF

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Publication number
WO2015157912A1
WO2015157912A1 PCT/CN2014/075400 CN2014075400W WO2015157912A1 WO 2015157912 A1 WO2015157912 A1 WO 2015157912A1 CN 2014075400 W CN2014075400 W CN 2014075400W WO 2015157912 A1 WO2015157912 A1 WO 2015157912A1
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WIPO (PCT)
Prior art keywords
mac
sending
mac sdu
pdu
end device
Prior art date
Application number
PCT/CN2014/075400
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English (en)
French (fr)
Inventor
马洁
曹振臻
Original Assignee
华为技术有限公司
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 华为技术有限公司 filed Critical 华为技术有限公司
Priority to EP14889386.0A priority Critical patent/EP3125488A4/en
Priority to CN201480000606.3A priority patent/CN105210346A/zh
Priority to JP2016562595A priority patent/JP2017515382A/ja
Priority to PCT/CN2014/075400 priority patent/WO2015157912A1/zh
Publication of WO2015157912A1 publication Critical patent/WO2015157912A1/zh
Priority to US15/293,834 priority patent/US20170034862A1/en

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Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W76/00Connection management
    • H04W76/10Connection setup
    • H04W76/14Direct-mode setup
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L69/00Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass
    • H04L69/22Parsing or analysis of headers
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L69/00Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass
    • H04L69/30Definitions, standards or architectural aspects of layered protocol stacks
    • H04L69/32Architecture of open systems interconnection [OSI] 7-layer type protocol stacks, e.g. the interfaces between the data link level and the physical level
    • H04L69/322Intralayer communication protocols among peer entities or protocol data unit [PDU] definitions
    • H04L69/324Intralayer communication protocols among peer entities or protocol data unit [PDU] definitions in the data link layer [OSI layer 2], e.g. HDLC
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W28/00Network traffic management; Network resource management
    • H04W28/02Traffic management, e.g. flow control or congestion control
    • H04W28/06Optimizing the usage of the radio link, e.g. header compression, information sizing, discarding information
    • H04W28/065Optimizing the usage of the radio link, e.g. header compression, information sizing, discarding information using assembly or disassembly of packets

Definitions

  • the embodiments of the present invention relate to a wireless communication technology, and in particular, to a data transmission method, a sender device, and a receiver device. Background technique
  • D2D Device to Device
  • the sender device when the distance between two mobile terminals is within a certain range, they can directly communicate without having to forward communication through the uplink and downlink of the base station. Specifically, similar to the process in the base station for transmitting data to the mobile terminal in the traditional communication mode, in the through communication mode, the sender device directly sends the data to be sent to the receiver device.
  • the embodiment of the invention provides a data transmission method, a sender device and a receiver device, and improves the reliability of data transmission by proposing a MAC layer structure that can simultaneously process data of multiple sender devices.
  • an embodiment of the present invention provides a data transmission method, including:
  • the sending end device sets the sending manner of the MAC SDU according to the logical channel class of the medium access control layer service data unit MAC SDU;
  • the incoming control layer protocol data unit MAC PDU is sent.
  • the sending end device sets the sending manner of the MAC SDU according to the logical channel type of the MAC SDU, including:
  • a broadcast mode indication bit is added to a header of the MAC PDU to set a transmission mode of the MAC SDU to a broadcast transmission mode.
  • the sending end device sets the sending manner of the MAC SDU according to the logical channel type of the MAC SDU, including:
  • the logical channel class of the MAC SDU is a unicast class, adding a unicast mode indication bit, an identifier of the sender device, and a unicast destination address to the packet header of the MAC PDU to send the MAC SDU
  • the mode is set to unicast transmission.
  • the sending end device sets the sending manner of the MAC SDU according to the logical channel type of the MAC SDU, including:
  • the logical channel class of the MAC SDU is a multicast class, adding a multicast mode indication bit, an identifier of the source device, and a multicast destination address in a packet header of the MAC PDU to send the MAC SDU
  • the mode is set to multicast transmission mode.
  • the method further includes: performing the radio link control layer protocol data unit RLC PDU segmentation of the originating device, where the method further includes:
  • the sending end device adds a segment bit, a sequence number bit or a concatenated bit to the packet header of the MAC PDU, where the segment bit indicates that the MAC SDU is segmented by the RLC PDU, and the sequence number is obtained.
  • the bit indicates the location of the MAC SDU in the RLC PDU, and the concatenated bit indicates whether there is still a MAC SDU after the MAC SDU.
  • the MAC PDU The header of the packet also carries a logical channel identifier.
  • an embodiment of the present invention provides a data transmission method, including:
  • the receiving end device receives the medium access control layer protocol data unit MAC PDU sent by the sending end device, where the MAC PDU is the transmitting end device according to the medium access control layer service data unit.
  • the sending mode of the logical channel class setting of the MAC SDU is sent;
  • the receiving end device sends the MAC PDU to a cache entity corresponding to the sending end device;
  • the receiving end device sends the MAC SDU included in the MAC PDU in the cache entity to a radio link control RLC layer.
  • the receiving end device receives the MAC PDU sent by the sending end device, including:
  • the receiving end device receives the MAC PDU that is sent by the sending end device by using a broadcast sending manner.
  • the receiving end device receives the MAC PDU sent by the sending end device, including:
  • the receiving end device receives the MAC PDU that is sent by the sending end device by using a unicast sending manner, where the packet header of the MAC PDU carries a unicast mode indication bit, an identifier of the sending end device, and a unicast destination address;
  • the receiving end device sends the MAC SDU corresponding to the MAC PDU in the cache entity to the RLC layer, including:
  • the receiving end device receives the MAC PDU sent by the sending end device, and includes:
  • the receiving end device receives the MAC PDU that is sent by the sending end device by using a multicast sending manner, where a packet header of the MAC PDU carries a multicast mode indication bit, an identifier of the sending end device, and a multicast destination address;
  • the receiving end device sends the MAC SDU included in the MAC PDU in the cache entity to the RLC layer, including:
  • the receiving end device determines whether the multicast destination address is consistent with the group identifier of the receiving end device, and if yes, sends the MAC SDU corresponding to the MAC PDU to the RLC layer.
  • the MAC PDU is If the originating device obtains the radio link control layer service data unit RLC PDU segmentation, the connection is The receiving device receives the MAC PDU sent by the sending device, including:
  • the receiving end device receives a MAC PDU that adds a segment bit, a sequence number bit or a concatenated bit in the packet header, where the segment bit indicates that the MAC SDU is segmented by the RLC PDU, and the sequence number bit indication a location of the MAC SDU in the RLC PDU, the cascading bit indicating whether there is still a MAC SDU after the MAC SDU;
  • the receiving end device Before the receiving end device sends the MAC SDU included in the MAC PDU in the cache entity to the RLC layer, the
  • the receiving end device sorts the MAC SDUs included in the MAC PDUs obtained by the same RLC PDU segment according to the sequence number bits, and sends the sorted MAC SDUs to the RLC layer.
  • the receiving end And sending, by the device, the MAC SDU included in the MAC PDU in the cache entity to the RLC layer, including: the receiving end device, according to the logical channel identifier carried in the packet header of the MAC PDU, the MAC included in the MAC PDU The SDU is sent to a logical channel in the RLC layer corresponding to the logical channel identifier.
  • an embodiment of the present invention provides a sending end device, including:
  • a setting module configured to set a sending manner of the MAC SDU according to a logical channel category of a medium access control layer service data unit MAC SDU;
  • a sending module configured to: according to the sending manner set by the setting module, by the MAC
  • the medium access control layer protocol data unit MAC PDU obtained by the SDU is transmitted.
  • the setting module is specifically configured to: when a logical channel class of the MAC SDU is a broadcast class, add a broadcast mode indication bit in a packet header of the MAC PDU. Thereby, the transmission mode of the MAC SDU is set to a broadcast transmission mode.
  • the setting module is specifically configured to add a unicast mode to a header of the MAC PDU if the logical channel type of the MAC SDU is a unicast category.
  • the indication bit, the identifier of the source device, and the unicast destination address thereby set the transmission mode of the MAC SDU to a unicast transmission mode.
  • the setting module is specifically used to If the logical channel class of the MAC SDU is a multicast class, adding a multicast mode indication bit, an identifier of the source device, and a multicast destination address in a packet header of the MAC PDU to send the MAC SDU The mode is set to multicast transmission mode.
  • the sending end device further includes:
  • Adding a module if the MAC SDU is obtained by segmenting a radio link control layer protocol data unit RLC PDU of the originating device, adding a segment bit, a sequence bit or a level to a header of the MAC PDU And the segment bit indicates that the MAC SDU is segmented by the RLC PDU, where the sequence number bit indicates a location of the MAC SDU in the RLC PDU, and the cascading bit indicates Whether there is still a MAC SDU after the MAC SDU.
  • the MAC PDU The header of the packet also carries a logical channel identifier.
  • an embodiment of the present invention provides a receiving end device, including:
  • a receiving module configured to receive a medium access control layer protocol data unit MAC PDU sent by the sending end device, where the MAC PDU is sent by the sending end device according to a logical channel category setting of a medium access control layer service data unit MAC SDU Way to send;
  • a sending module configured to send the MAC PDU received by the receiving module to a cache entity corresponding to the sending end device, and send the MAC SDU included in the MAC PDU in the cache entity to the wireless
  • the link controls the RLC layer.
  • the receiving module is specifically configured to receive the MAC PDU that is sent by the sending end device by using a broadcast sending manner.
  • the receiving device further includes: a determining module
  • the receiving module is configured to receive the MAC PDU that is sent by the sending end device by using a unicast sending manner, where a packet header of the MAC PDU carries a unicast mode indication bit, an identifier of the sending end device, and a unicast Destination address;
  • the determining module is configured to determine whether the unicast destination address is consistent with the identifier of the receiving end device;
  • the sending module is specifically configured to: if the determining module determines that the unicast destination address is consistent with the identifier of the receiving device, send the MAC SDU included in the MAC PDU to the RLC layer.
  • the receiving device further includes: a determining module
  • the receiving module is specifically configured to receive the MAC PDU that is sent by the sending end device by using a multicast sending manner, where a packet header of the MAC PDU carries a multicast mode indication bit, an identifier of the sending end device, and multicast Destination address;
  • the determining module is configured to determine whether the multicast destination address is consistent with the group identifier of the receiving end device
  • the sending module is configured to: if the determining module determines that the multicast destination address is consistent with the group identifier of the receiving device, send the MAC SDU included in the MAC PDU to the RLC layer.
  • the receiving device further includes: Module
  • the receiving module is specifically configured to receive a MAC PDU that adds a segment bit, a sequence number bit, or a cascading bit in the packet header, where the segment bit indicates that the MAC SDU is segmented by the RLC PDU, where The sequence number bit indicates the location of the MAC SDU in the RLC PDU, the cascading bit indicates whether there is still a MAC SDU after the MAC SDU; the ordering module is configured to use the same bit according to the sequence number bit Sorting the MAC SDUs included in each of the MAC PDUs obtained by the RLC PDU segmentation;
  • the sending module is specifically configured to send the MAC SDU sorted by the sorting module to an RLC layer.
  • the sending module Specifically, the MAC SDU included in the MAC PDU is sent to the logical channel corresponding to the logical channel identifier in the RLC layer according to the logical channel identifier carried in the packet header of the MAC PDU.
  • an embodiment of the present invention provides a sending end device, including: a processor and a storage
  • the memory stores an execution instruction, when the transmitting device operates, the processor communicates with the memory, and the processor executes the execution instruction to cause the transmitting device to perform the first Aspect, any one of the first to fifth possible implementations of the first aspect.
  • an embodiment of the present invention provides a receiving end device, including: a processor and a memory, where the memory stores an execution instruction, and when the receiving end device is in operation, the processor and the memory communicate with each other. And executing, by the processor, the execution instruction, so that the receiving end device performs any one of the first to fifth aspects of the second aspect, the second aspect, and the possible implementation manner.
  • the embodiment of the present invention provides a data transmission method, a sending end device, and a receiving end device.
  • the sending end device sets the sending manner of the MAC SDU according to the logical channel type of the MAC SDU, and sends the MAC SDU according to the sending manner, so that the receiving end
  • the device caches the MAC SDU and processes it. If multiple sender devices send MAC PDUs to the receiver device at the same time, the receiver device caches the MAC PDUs sent by different sender devices to the cache instance of each sender device pair and processes them. In this process, the receiving end device can simultaneously process the MAC SDUs sent by multiple sending end devices, thereby improving the reliability of data transmission in D2D communication.
  • FIG. 1 is a schematic diagram of a user plane protocol stack in a data transmission method according to the present invention
  • Embodiment 1 of a data transmission method according to the present invention
  • FIG. 3 is a schematic structural diagram of a MAC entity of a transmitting end device according to the present invention.
  • FIG. 4 is a flowchart of a transmission mode setting and an address adding process in a data transmission method according to the present invention
  • FIG. 5 is a flowchart of Embodiment 2 of a data transmission method according to the present invention.
  • FIG. 6 is a schematic structural diagram of a MAC entity of a receiving end device according to the present invention.
  • FIG. 7A is a schematic diagram of a packet header format of a MAC PDU sent by a broadcast method in a data transmission method according to the present invention.
  • FIG. 7B is a schematic diagram of a header format of a MAC PDU transmitted in a unicast manner in the data transmission method of the present invention.
  • 7C is a schematic diagram of a header format of a MAC PDU transmitted in a multicast manner in the data transmission method of the present invention.
  • FIG. 8 is a schematic structural diagram of a MAC-U entity in a data transmission method according to the present invention.
  • FIG. 9 is a schematic structural diagram of a MAC-GU entity in a data transmission method according to the present invention.
  • FIG. 10 is another schematic structural diagram of a MAC-U in a data transmission method according to the present invention.
  • FIG. 11 is a schematic diagram of a header format of a MAC PDU with a sequence number bit added to the data transmission method of the present invention
  • FIG. 12A is a schematic diagram of a common header and a sub-packet in a data transmission method according to the present invention
  • FIG. 12B is a schematic diagram of another common header and a sub-packet in the data transmission method according to the present invention
  • FIG. 13A is a schematic diagram of a data packet format after a MAC PDU transmitted in a broadcast manner is demultiplexed in a data transmission method according to the present invention
  • 13B is a schematic diagram of a data packet format after the MAC PDU sent by the unicast mode is demultiplexed in the data transmission method of the present invention
  • FIG. 13C is a schematic diagram of a format of a data packet after demultiplexing a MAC PDU sent by a multicast mode in the data transmission method of the present invention
  • Embodiment 1 of a transmitting end device is a schematic structural diagram of Embodiment 1 of a transmitting end device according to the present invention.
  • Embodiment 15 is a schematic structural diagram of Embodiment 2 of a transmitting end device according to the present invention.
  • Embodiment 16 is a schematic structural diagram of Embodiment 1 of a receiving end device according to the present invention.
  • Embodiment 17 is a schematic structural diagram of Embodiment 2 of a receiving end device according to the present invention.
  • Embodiment 3 of a transmitting end device is a schematic structural diagram of Embodiment 3 of a transmitting end device according to the present invention.
  • FIG. 19 is a schematic structural diagram of Embodiment 3 of a receiving end device according to the present invention.
  • the technical solutions in the embodiments of the present invention are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present invention.
  • the embodiments are a part of the embodiments of the invention, and not all of the embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.
  • the mobile terminal is a cellular through terminal capable of simultaneously performing traditional cellular communication and direct communication between terminals.
  • the cellular through terminal that transmits data is referred to as a transmitting device and will receive data.
  • a cellular straight-through terminal is called a receiving end device.
  • the user plane protocol stack of the transmitting end device and the receiving end device is as shown in FIG. 1.
  • FIG. 1 is a schematic diagram of a user plane protocol stack in the data transmission method of the present invention. As shown in Figure 1, the user plane protocol stack goes from top to bottom.
  • PDCP Packet Data Convergence Protocol
  • RLC Radio Link Control
  • MAC Medium Link Control
  • PHY Physical
  • FIG. 2 is a flowchart of Embodiment 1 of a data transmission method according to the present invention.
  • the execution body of this embodiment is a transmitting end device, and is applicable to a scenario in which multiple transmitting end devices simultaneously transmit data to one receiving end device in the through communication. Specifically, the embodiment includes the following steps:
  • the sending end device sets a sending manner of the MAC SDU according to a logical channel category of the medium access control layer service data unit MAC SDU.
  • each mobile terminal has a MAC entity, and the MAC entity of the transmitting device can implement mapping of logical channels to transport channels, and each transport channel corresponds to a different logical channel.
  • the logical channel (LCH) is obtained by dividing the data stream to distinguish the data flows of different services, including a Broadcast Control Channel (BCCH), a Physical Control Channel (PCCH), and more. Multicast Control Channel (MCCH), Multicast Traffic Channel (MTCH), Common Control Channel (CCCH), Dedicated Control Channel (DCCH), etc.; Broadcast Channel (BCH), Downlink Shared Channel (DL-SCH), Paging Channel (PCH), Uplink Shared Channel (UL-SCH), Random Access Channel (Random) Access Channe, RACH), Multicast Channel (MCH), etc.
  • BCCH Broadcast Control Channel
  • PCCH Physical Control Channel
  • MCH Multicast Control Channel
  • MCCH Multicast Traffic Channel
  • CCCH Common Control Channel
  • DCCH Dedicated Control Channel
  • BCH Broadcast Channel
  • BCH Downlink Shared Channel
  • the transmitting device can divide the LCH into different categories according to the manner in which the LCH is sent. For example, if both BCCH and PCCH are broadcasted, they are classified into broadcast categories. If MCCH and MTCH are all sent in multicast mode, they are classified into multicast categories. CCCH and DCCH are all unicast. If it is sent by mode, it will be divided into unicast categories. Then, according to the logical channel category in which the MAC SDU is located, the sending manner of the MAC SDU is set.
  • the MAC SDU is set to the multicast transmission mode; if the MAC SDU is the data of the MCCH or the MTCH, the MAC SDU is set to the multicast transmission mode; if the MAC SDU For the CCCH or DCCH data, set the MAC SDU to unicast Delivery method.
  • the sending end device sends, according to the sending mode, the medium access control layer protocol data unit MAC PDU obtained by the MAC SDU.
  • each layer receives the SDU from the upper layer and outputs the PDU to the bottom layer. Therefore, in this step, after setting the transmission mode of the MAC SDU according to the logical channel type, the transmitting device sends the MAC PDU obtained by the MAC SDU according to the sending manner, so that the receiving device caches the MAC PDU and processes the MAC PDU. . In this process, if multiple sending end devices send MAC PDUs to the receiving end device at the same time, the receiving end device caches the MAC PDUs sent by different sending end devices to the cache instance of each sending end device and processes them.
  • the transmitting device sets the sending manner of the MAC SDU according to the logical channel type of the MAC SDU, and sends the MAC SDU according to the sending manner, so that the receiving device caches the MAC SDU and processes the data.
  • the receiver device caches the MAC PDUs sent by different sender devices to the cache instance of each sender device pair and processes them.
  • the receiving end device can simultaneously process the MAC SDUs sent by multiple sending end devices, thereby improving the reliability of data transmission in D2D communication.
  • the MAC layer entity processes the data of the PHY layer and sends it to the RLC layer.
  • the RLC layer encapsulates the data packet for each service data stream and performs reliability transmission. Since the entity of the RLC layer corresponds to a logical channel, the MAC layer processes the data of the PHY layer into a transport channel to transmit data. Therefore, the MAC entity of the transmitting device needs to have the function of mapping the logical channel of the RLC layer to the transmission channel, and multiplexing the multiple logical channels into one transmission channel, thereby maximally utilizing the air interface resources.
  • FIG. 3 is a schematic structural diagram of a MAC entity of a sending end device according to the present invention.
  • the MAC entity of the sender device has a control module, and implements a logical channel priority processing function, a multiplexing function, a packet header processing, a group control, and the like through the control module. These functions will be described in detail below in conjunction with FIG. 3.
  • the uplink control channel is the sender device joining the wireless group.
  • a logical channel whose corresponding transport channel is D2D PRACH; the corresponding transport channel of the Group Announcement Channel (GACH) is D2D GACH.
  • GACH Group Announcement Channel
  • each mobile terminal belongs to a different wireless group in a public event, for example, may belong to a rescue group or a command group, or belong to a different rescue group.
  • at least one mobile terminal is a group head node, and the remaining mobile terminals are group member nodes. Please refer to the head
  • the sender device is a group head node
  • the RLC layer entity has a GACH logical channel
  • the information of the logical channel is transparently transmitted to the PHY layer at the MAC layer
  • the group head node periodically sends the "group announcement" information through the GACH.
  • the group head node can also schedule data transmissions of other group members to better utilize limited radio resources to avoid interference and collision.
  • the sender device is a group member node, it can send an initial access request to the group head node through the UCCH to become a member of the wireless group. It should be noted that since one mobile terminal can join more than two wireless groups at the same time. Therefore, in some wireless groups, the sender device can be a group head node, and in other wireless groups, the sender device can be a group member node.
  • the transmitting device sends service data such as video and picture to the receiving device, and each service has at least one data stream.
  • service data such as video and picture
  • each service has at least one data stream.
  • the video service has both data streams of voice and image, and each data stream corresponds to one logical channel. (ie an RLC instance). Therefore, when data of a plurality of logical channels needs to be transmitted, the MAC layer transmits data of a plurality of logical channels to have a multiplexing function when the radio resources are relatively abundant. Further, in order to satisfy the service quality of each service data, when multiple logical channels are multiplexed, the MAC layer prioritizes each logical channel to have a logical channel priority processing function.
  • FIG. 4 is a flowchart of a sending mode setting and an address adding process in a data transmission method according to the present invention.
  • a MAC PDU is included in one MAC SDU; or, in a MAC PDU.
  • the MAC entity receives the MAC SDU carrying the logical channel category.
  • step 202 Determine whether the logical channel category of the MAC SDU is a broadcast category, and if yes, execute step 203; otherwise, execute step 204.
  • the MAC entity can determine the logical channel type according to configuration parameters, etc., for example, 0, 1, respectively. 2 indicates that the category of the logical channel is a broadcast category, a unicast category, and a multicast category.
  • each layer receives the SDU from the upper layer and outputs the PDU to the bottom layer. Therefore, in this step, if the MAC entity determines that the logical channel type is a broadcast category, the broadcast mode indication bit is added to the packet header of the MAC PDU. Since the broadcast mode is used, it is not necessary to add the destination address. After the header processing is completed, the MAC address is processed. The MAC PDU is sent to the PHY layer.
  • the unicast destination addresses are classified into two types. The first type is: if the mobile terminal corresponding to the destination address belongs to the same radio group, the short address in the group can be used to describe the destination address; If the mobile terminal corresponding to the destination address does not belong to the same radio group, you need to add the global address, that is, the group ID and the intra-group address of the target mobile terminal.
  • each layer receives the SDU from the upper layer and outputs the PDU to the bottom layer. Therefore, the processed MAC PDU is sent to the PHY layer.
  • the category of the logical channel is not a broadcast category or a unicast category, it is a multicast category.
  • a multicast mode indication bit and a multicast destination address are added to the packet header, where the multicast destination address is generally considered to be a group identifier.
  • the processed MAC PDU is sent to the PHY layer.
  • a MAC PDU includes only one MAC SDU
  • the foregoing adding a broadcast mode indication bit, a unicast mode indication bit, a multicast mode indication bit, etc. in the header of the MAC PDU refers to the MAC PDU.
  • the above-mentioned adding a broadcast mode indication bit, a unicast mode indication bit, a multicast mode indication bit, etc. in the header of the MAC PDU refers to a sub-MAC PDU. Added in the header.
  • the packet header is processed according to the logical channel type, and the implementation group is implemented. Broadcast, unicast and broadcast functions, and the overhead of the header is minimal.
  • the sending device further needs to add a segment bit, a sequence bit, or a cascading bit in the header of the MAC PDU.
  • the segmentation bit indicates that the MAC SDU is segmented for the RLC PDU
  • the sequence number bit indicates the location of the MAC SDU in the RLC PDU
  • the concatenation bit indicates whether the packet header is followed by a packet header or a MAC SDU.
  • the logical channel identifier is also carried in the packet header of the MAC PDU.
  • the receiving device receives the PDU from the bottom layer at each receiving end, and outputs the SDU to the upper layer. Therefore, if the data packet is determined, the MAC SDU included in the MAC PDU is transmitted to the corresponding RLC entity according to the logical channel identifier.
  • FIG. 5 is a flowchart of Embodiment 2 of a data transmission method according to the present invention.
  • the executor of this embodiment is a receiving end device, and is applicable to a scenario in which multiple transmitting end devices in a straight-through communication simultaneously send data to one receiving end device. Specifically, the embodiment includes the following steps:
  • the receiving end device receives a medium access control layer service data unit MAC PDU sent by the sending end device, where the MAC PDU is sent by the sending end device according to a sending manner set by a logical channel category of the MAC SDU.
  • MAC PDU medium access control layer service data unit
  • the physical layer of the receiving end device receives the MAC PDU sent by the transmitting end device according to the sending mode set by the logical channel class of the MAC SDU.
  • the receiving end device sends the MAC PDU to a cache entity corresponding to the sending end device.
  • the receiving device proposes a MAC-U entity for each sender device, that is, a cache entity. After receiving the MAC PDU, the receiving device sends the MAC PDU to the corresponding cache entity. If there are multiple sender devices, the MAC PDUs sent by the sender devices are sent to the corresponding cache entity.
  • the receiving end device sends the MAC SDU included in the MAC PDU in the cache entity to the radio link control RLC layer.
  • the receiving device After receiving the demultiplexing and de-packet processing of the MAC PDU in the cache entity, the receiving device sends the processed MAC SDU to the corresponding RLC entity according to the logical channel identifier.
  • the receiving end device receives the sending end device according to the After the MAC PDU sent by the sending mode of the logical channel class of the MAC PDU is set, the MAC PDU is buffered and processed. If multiple sending devices send MAC PDUs to the receiving device at the same time, the receiving device sends the MAC sent by the different sending device. The PDU is buffered and processed in the cache instance of each sender device. In this process, the receiving end device can simultaneously process MAC PDUs sent by multiple sending end devices, thereby improving the reliability of data transmission in D2D communication.
  • FIG. 6 is a schematic structural diagram of a MAC entity of a receiving end device according to the present invention.
  • the MAC entity of the receiving end device has a control module, and the cache entity MAC-U is established for each transmitting end device by the control module.
  • the PHY layer After receiving the MAC PDU sent by the transmitting device, the PHY layer sends the MAC PDU to the corresponding MAC-U via the distribution module, and the MAC-U performs header processing and the like to send to the corresponding logical channel.
  • the distribution module, the cache entity, and the like of the MAC entity of the receiving device will be described in detail with reference to FIG.
  • the distribution module will be described in detail. Specifically, the packet header of the MAC PDU received by the receiving end device carries the identifier of the sending end device, the logical channel identifier, and the transmission mode indication bit " ⁇ / ⁇ / ⁇ ", where ⁇ is the broadcast sending mode, indicating the transmitting end The device broadcast is sent to all the receiving devices of the data packet that can receive him; ⁇ is the unicast sending mode, indicating that the sending end device sends the MAC PDU to the specific receiver; M is the multicast sending mode, indicating that the sending end device will MAC The PDU is sent to multiple receivers with certain characteristics. Therefore, the distribution module can send the MAC PDUs sent by different sender devices to the corresponding MAC-U according to the information in the header of the MAC PDU. See Figures 7A-7C.
  • FIG. 7A is a schematic diagram of a packet header format of a MAC PDU sent by a broadcast method in a data transmission method according to the present invention.
  • the transmission mode indication bit "B/P/M" is B
  • the header does not contain the address information or the identifier of the receiver, and the subsequent processing can be performed as long as the data can be correctly received at the physical layer.
  • the distribution module distributes according to the identifier of the sender device carried in the packet header, that is, the packet is sent to the MAC-U entity corresponding to the identifier of the sender device.
  • FIG. 7B is a schematic diagram of a packet header format of a MAC PDU transmitted in a unicast manner in the data transmission method of the present invention.
  • the packet header needs to contain the address information or the identifier of the receiver.
  • the distribution module determines that the transmission mode indication bit is P, it will continue to read the packet header, obtain the unicast destination address, and compare the unicast destination address with its own identifier.
  • FIG. 7B shows a data unit having multiple logical channels in one data packet.
  • FIG. 7C is a schematic diagram of a header format of a MAC PDU transmitted in a multicast manner in the data transmission method of the present invention.
  • the transmission mode indication bit "B/P/M" is M
  • the packet header needs to contain the address information or the identifier of the receiver.
  • the distribution module determines that the transmission mode indication bit is M, it continues to read the packet header, obtains a multicast destination address, such as a target group ID, and associates the group identifier with the group in which it is located. The group IDs are compared.
  • the receiver device is the target receiver device, and the data packet is sent to the MAC-U entity corresponding to the identifier of the sender device. Otherwise, if they are inconsistent, they are considered to be The receiving device is not the receiver of this packet, and the distribution module discards the packet.
  • FIG. 8 is a schematic structural diagram of a MAC-U entity in a data transmission method according to the present invention.
  • the receiving end device supervises the MAC-U for each transmitting device, demultiplexes the data packet by the MAC-U, removes the packet header of the MAC layer, and obtains the RLC PDU, and then according to the logical channel identifier, Each RLC PDU is sent to the corresponding RLC entity.
  • FIG. 9 is a schematic structural diagram of a MAC-GU entity in the data transmission method of the present invention.
  • the MAC-GA instance corresponds to the GACH logical channel and is used to receive the "group announcement" information sent by the group head node.
  • the GACH channel has unique physical resources at the physical layer, such as frequency independent resources or time independent resources.
  • the receiving end node joins multiple wireless groups at the same time, because the "group announcement" information of each group can also be distinguished by physical resources, that is, the physical layer can distinguish whether a data is GACH data, and thus, the receiving end After receiving the data belonging to the GACH channel, the physical layer of the device directly sends the data into the GACH-GA entity. Then, the GACH-GA does not add any headers to the data, and directly integrates into the RLC entity in which the logical channel corresponding to the GACH is located.
  • the MAC SDU is obtained, for example, by the originating device segmenting the radio link control layer service data unit RLC PDU.
  • the packet header of the MAC PDU received by the receiving device is added.
  • Segment bit, sequence bit or concatenated bit indicates that the MAC SDU is segmented for the RLC PDU
  • the sequence number bit indicates the location of the MAC SDU in the RLC PDU
  • the concatenated bit indicates whether there is still a MAC SDU after the MAC PDU.
  • the MAC-U entity established in the receiving device sorts the MAC SDUs obtained by segmenting the same RLC PDU according to the sequence number bits, and sends the sorted MAC SDUs to the RLC layer.
  • FIG. 10 is another schematic structural diagram of the MAC-U in the data transmission method of the present invention; the packet header of the MAC is as shown in FIG. 11, and FIG. 11 is the data transmission of the present invention.
  • a schematic diagram of a header format of a MAC PDU with a sequence number bit is added.
  • S is a segmentation bit, indicating whether the current data packet is a fragmented data packet
  • E or E1 is a packet header indication bit, and the identification bit is followed by a data packet header or a data packet itself.
  • the transmitting device may send data packets of multiple logical channels at a time.
  • the identifiers of the transmitting devices in the header of the data packets are the same, and the transmission mode indication bits, logical channel identifiers, and the like are different.
  • the header is divided into two parts, and the identifier of the sender device in each packet header is referred to as a common packet header, and the portion of each packet header other than the identifier of the sender device is referred to as a sub-packet header, and multiple The sub-packets of a packet are generally different.
  • FIG. 12A and FIG. 12B FIG. 12A is a schematic diagram of a common header and a sub-packet in the data transmission method of the present invention
  • FIG. 12B is a schematic diagram of another common header and a sub-packet in the data transmission method of the present invention.
  • the header formats of the two data packets sent by the sender device are respectively as shown in FIG. 12A and FIG. 12B, and the identifiers of the sender devices of the two packet headers are the same, which is a common packet header.
  • the sub-packets are different, that is, the second byte in Fig. 12A is different from the second byte to the sixth byte in Fig. 12B.
  • the distribution module of the receiving device determines that the MAC PDU is its own data packet, it is sent to the corresponding MAC-U and demultiplexed by the MAC-U. And sending to the corresponding RLC entity according to the logical channel identifier; otherwise, if the distribution module of the receiving device determines that the MAC PDU is not its own data packet, the data packet is discarded.
  • the distribution module may first demultiplex each MAC PDU, and confirm whether it is the correct receiver according to each sub-packet of the MAC PDU. , then send each packet to the MAC-U entity; no, lj, discard the packet.
  • FIGS. 13A to 13C the data packet obtained by the distribution module for demultiplexing is as shown in FIGS. 13A to 13C.
  • Figure 13A is a data transmission of the present invention
  • FIG. 13B is a schematic diagram of a data packet format after demultiplexing a MAC PDU sent by a broadcast mode in a data transmission method according to the present invention.
  • FIG. 13B is a schematic diagram of a data packet format after demultiplexing a MAC PDU sent by a unicast mode in the data transmission method of the present invention.
  • 13C is a schematic diagram of a data packet format after demultiplexing a MAC PDU sent by a multicast mode in the data transmission method of the present invention.
  • the distribution module may only send the MAC PDU to the MAC-U according to the identifier of the sending end device, and the MAC-U demultiplexes each MAC-PDU. The MAC-U then confirms whether it is the correct recipient based on the sub-packet header, and if so, sends each packet to the MAC-U entity; otherwise, the packet is discarded.
  • FIG. 14 is a schematic structural diagram of Embodiment 1 of a transmitting end device according to the present invention.
  • the device in the embodiment of the present invention is an embodiment of the device corresponding to the embodiment of the present invention.
  • the specific implementation process is not described herein.
  • the sending device 100 provided in this embodiment specifically includes:
  • the setting module 11 is configured to set a sending manner of the MAC SDU according to a logical channel category of the medium access control layer service data unit MAC SDU;
  • the sending module 12 is configured to send, according to the sending manner set by the setting module 11, the medium access control layer protocol data unit MAC PDU obtained by the MAC SDU.
  • the sending end device sets the sending manner of the MAC SDU according to the logical channel type of the MAC SDU, and sends the MAC SDU according to the sending manner, so that the receiving end device caches the MAC SDU and processes the data if multiple sending
  • the terminal device sends the MAC PDU to the receiving device at the same time, and the receiving device caches the MAC PDU sent by the different sending device to the cache instance of each sending device pair and processes the MAC PDU.
  • the receiving end device can simultaneously process the MAC SDUs sent by multiple sending end devices, thereby improving the reliability of data transmission in D2D communication.
  • the setting module 11 is specifically configured to: if the logical channel category of the MAC SDU is a broadcast category, add a broadcast mode indication bit in a packet header of the MAC PDU to set a MAC SDU sending manner to Broadcast transmission method.
  • the setting module 11 is specifically configured to: if the logical channel type of the MAC SDU is a unicast category, add a unicast mode indication bit, an identifier of the sending end device, and The unicast destination address thus sets the MAC SDU transmission mode to the unicast transmission mode.
  • the setting module 11 is specifically configured to: if the MAC SDU is logical If the channel type is a multicast category, the multicast mode indication bit, the identifier of the sender device, and the multicast destination address are added to the header of the MAC PDU to set the transmission mode of the MAC SDU to the multicast transmission mode.
  • FIG. 15 is a schematic structural diagram of Embodiment 2 of a transmitting end device according to the present invention. As shown in FIG. 15, the transmitting device 100 of the present embodiment is further based on the structure shown in FIG. 14, and further includes:
  • the adding module 13 is configured to add a segment bit, a sequence number bit or a cascading bit in the header of the MAC PDU if the MAC SDU is obtained by segmenting the radio link control layer protocol data unit RLC PDU of the originating device, and segmenting The bit indicates that the MAC SDU is segmented for the RLC PDU, the sequence number bit indicates the location of the MAC SDU in the RLC PDU, and the cascading bit indicates whether there is still a MAC SDU after the MAC SDU.
  • FIG. 16 is a schematic structural diagram of Embodiment 1 of a receiving end device according to the present invention.
  • the receiving device provided in this embodiment is an embodiment of the device corresponding to the embodiment of FIG. 5 of the present invention, and the specific implementation process is not described herein.
  • the receiving device 200 provided in this embodiment specifically includes:
  • the receiving module 21 is configured to receive a media access control layer protocol data unit sent by the sending end device.
  • the MAC PDU is sent by the sending end device according to the sending mode set by the logical channel class of the medium access control layer service data unit MAC SDU;
  • the sending module 22 is configured to send the MAC PDU received by the receiving module 21 to the cache entity corresponding to the sending device, and then send the MAC SDU included in the MAC PDU in the buffering entity to the radio link control RLC layer.
  • the receiving end device provided by the embodiment of the present invention, after receiving the MAC PDU sent by the sending end device according to the sending mode set by the logical channel class of the MAC PDU, buffers the MAC PDU and processes the same, if multiple sending end devices simultaneously transmit to the receiving end
  • the device sends a MAC PDU, and the receiving device caches the MAC PDU sent by the different sending device to the cache instance of each sending device and processes it.
  • the receiving end device can simultaneously process MAC PDUs sent by multiple sending end devices, thereby improving the reliability of data transmission in D2D communication.
  • the receiving module 21 is specifically configured to receive a MAC PDU that is sent by the sending end device by using a broadcast sending manner.
  • FIG. 17 is a schematic structural diagram of Embodiment 2 of a receiving end device according to the present invention.
  • the receiving device 200 of the present embodiment is further based on the structure shown in FIG. 16, and further includes:
  • the receiving module 21 is configured to receive a MAC PDU sent by the sending end device by using a unicast sending manner, where the packet header of the MAC PDU carries a unicast mode indication bit, an identifier of the sending end device, and a unicast destination address. And determining, by the sending module 22, the sending module 22, where the determining module 23 determines that the unicast destination address is consistent with the identifier of the receiving device, and then the MAC SDU included in the MAC PDU. Send to the RLC layer.
  • the receiving module 21 is specifically configured to receive a MAC PDU sent by the sending end device by using a multicast sending manner, where the packet header of the MAC PDU carries a multicast mode indication bit and an identifier of the sending end device. And the multicast destination address; the determining module 23 is configured to determine whether the multicast destination address is consistent with the group identifier of the receiving device; the sending module 22 is specifically configured to determine, by the determining module 23, the multicast destination address and the group of the receiving device If the identifiers are consistent, the MAC SDU corresponding to the MAC PDU is sent to the RLC layer.
  • the receiving device further includes: a sorting module 24, and the receiving module 21 is configured to receive a segment bit, a sequence bit, or a cascading bit in the packet header.
  • MAC PDU the segmentation bit indicates that the MAC SDU is obtained by segmenting the RLC PDU
  • the sequence number bit indicates the location of the MAC SDU in the RLC PDU
  • the cascading bit indicates whether there is still a MAC SDU after the MAC SDU
  • the ordering module 24 is used to The MAC SDUs included in the MAC PDUs segmented by the same RLC PDU are sorted according to the sequence number bits.
  • the sending module 22 is specifically configured to send the MAC SDUs sorted by the sorting module 24 to the RLC layer.
  • the sending module 22 is configured to send, according to the logical channel identifier carried in the packet header of the MAC PDU, the MAC SDU included in the MAC PDU to the logic corresponding to the logical channel identifier in the RLC layer. In the channel.
  • FIG. 18 is a schematic structural diagram of Embodiment 3 of a transmitting end device according to the present invention.
  • the transmitting device 300 provided by this embodiment includes: a processor 31 and a memory 32.
  • the transmitting device 300 may further include a transmitter 33 and a receiver 34.
  • Transmitter 33 and receiver 34 can be coupled to processor 31.
  • the transmitter 33 is configured to transmit data or information
  • the receiver 34 is configured to receive data or information
  • the memory 32 stores execution instructions.
  • the processor 31 communicates with the memory 32, and the processor 31 calls
  • the execution instructions in the memory 32 are used to execute the method embodiment shown in FIG. 2, and the implementation principle and technical effects are similar, and details are not described herein again.
  • FIG. 19 is a schematic structural diagram of Embodiment 3 of a receiving end device according to the present invention.
  • the receiving end device 400 provided in this embodiment includes: a processor 41 and a memory 42.
  • Receiving device The 400 can also include a transmitter 43, a receiver 44. Transmitter 43 and receiver 44 can be coupled to processor 41.
  • the transmitter 43 is configured to transmit data or information
  • the receiver 44 is configured to receive data or information
  • the memory 42 stores execution instructions.
  • the processor 41 communicates with the memory 42 and the processor 41 calls
  • the execution instructions in the memory 42 are used to execute the method embodiment shown in FIG. 5, and the implementation principle and technical effects are similar, and details are not described herein again.

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Abstract

本发明实施例提供一种数据传输方法、发送端设备与接收端设备,该方法包括:发送端设备根据媒质接入控制层业务数据单元MAC SDU的逻辑信道类别,设置MAC SDU的发送方式;发送端设备根据发送方式,对由MAC SDU得到的媒质接入控制层协议数据单元MAC PDU进行发送。若多个发送端设备同时向接收端设备发送MAC PDU,则接收端设备将不同发送端设备发送的MAC PDU缓存至各发送端设备对的缓存实例中并处理。该过程中,接收端设备可同时处理多个发送端设备发送的MAC SDU,提高D2D通信中数据传输的可靠性。

Description

数据传输方法、 发送端设备与接收端设备
技术领域
本发明实施例涉及无线通信技术, 尤其涉及一种数据传输方法、 发送端 设备与接收端设备。 背景技术
目前, 蜂窝移动通信系统中, 两个移动终端之间的通信大多采用传统通 信方式。 该方式中, 需要通信的两个终端通过基站的转发而通信。 当发生火 灾等公共安全事件后, 救援小组和指挥组会在一定的区域内进行通信, 不同 组的移动终端之间需要传输大量的视频流等, 为避免造成基站的拥塞而导致 救援失败, 引入通信终端直通 (Device to Device, D2D) 技术。
D2D技术中, 当两个移动终端的距离在一定范围时,它们可以直接通信, 而不必通过基站的上下行链路转发通信。 具体的, 类似于传统通信方式中基 站向移动终端发送数据的过程, 直通通信方式中, 发送方设备将待发送数据 直接发送给接收方设备。
但是, 直通方式中, 可能存在多个发送方同时向一个接收方发送数据的 场景, 例如, 救援小组中的各成员同时向指挥组中的一个成员同时发送数据。 此时, 由于移动终端的媒质接入控制 (Radio Link Control, MAC) 层只能处 理来自一个发送端设备的数据, 导致数据传输失败。 发明内容
本发明实施例提供一种数据传输方法、 发送端设备与接收端设备, 通过 提出一种可同时处理多个发送端设备的数据的 MAC层结构, 提高数据传输 的可靠性。
第一个方面, 本发明实施例提供一种数据传输方法, 包括:
发送端设备根据媒质接入控制层业务数据单元 MAC SDU的逻辑信道类 另 lj, 设置所述 MAC SDU的发送方式;
所述发送端设备根据所述发送方式, 对由所述 MAC SDU得到的媒质接 入控制层协议数据单元 MAC PDU进行发送。
在第一个方面的第一种可能的实现方式中,所述发送端设备根据 MAC SDU的逻辑信道类别, 设置所述 MAC SDU的发送方式, 包括:
若所述 MAC SDU的逻辑信道类别为广播类别, 则在所述 MAC PDU的 包头中添加广播模式指示比特从而将所述 MAC SDU的发送方式设置为广播 发送方式。
在第一个方面的第二种可能的实现方式中, 所述发送端设备根据 MAC SDU的逻辑信道类别, 设置所述 MAC SDU的发送方式, 包括:
若所述 MAC SDU的逻辑信道类别为单播类别, 则在所述 MAC PDU 的包头中添加单播模式指示比特、 所述发送端设备的标识以及单播目的地址 从而将所述 MAC SDU的发送方式设置为单播发送方式。
在第一个方面的第三种可能的实现方式中, 所述发送端设备根据 MAC SDU的逻辑信道类别, 设置所述 MAC SDU的发送方式, 包括:
若所述 MAC SDU的逻辑信道类别为多播类别, 则在所述 MAC PDU 的包头中添加多播模式指示比特、 所述发送端设备的标识以及多播目的地址 从而将所述 MAC SDU的发送方式设置为多播发送方式。
结合第一个方面、 第一个方面的第一种、 第二种或第三种可能的实现方 式, 在第一个方面的第四种可能的实现方式中, 若所述 MAC SDU为对所述 发端设备的无线链路控制层协议数据单元 RLC PDU分段得到的,则所述方法 还包括:
所述发送端设备在所述 MAC PDU的包头中添加分段比特、序号比特或 级联比特, 所述分段比特指示所述 MAC SDU为对所述 RLC PDU进行分段 得到的, 所述序号比特指示所述 MAC SDU在所述 RLC PDU中的位置, 所述级联比特指示所述 MAC SDU后是否还存在 MAC SDU。
结合第一个方面、 第一个方面的第一种、 第二种、 第三种或第四种可能 的实现方式, 在第一个方面的第五种可能的实现方式中, 所述 MAC PDU的 包头中还携带逻辑信道标识。
第二个方面, 本发明实施例提供一种数据传输方法, 包括:
接收端设备接收发送端设备发送的媒质接入控制层协议数据单元 MAC PDU, 所述 MAC PDU为所述发送端设备根据媒质接入控制层业务数据单元 MAC SDU的逻辑信道类别设置的发送方式进行发送的;
所述接收端设备将所述 MAC PDU发送至与所述发送端设备对应的缓存 实体中;
所述接收端设备将所述缓存实体中的所述 MAC PDU包含的 MAC SDU 发送至无线链路控制 RLC层。
在第二个方面的第一种可能的实现方式中, 所述接收端设备接收发送端 设备发送的 MAC PDU, 包括:
所述接收端设备接收所述发送端设备通过广播发送方式发送的所述 MAC PDU。
在第二个方面的第二种可能的实现方式中, 所述接收端设备接收发送端 设备发送的 MAC PDU, 包括:
所述接收端设备接收所述发送端设备通过单播发送方式发送的所述 MAC PDU, 所述 MAC PDU的包头中携带单播模式指示比特、所述发送端设 备的标识以及单播目的地址;
所述接收端设备将所述缓存实体中的所述 MAC PDU对应的 MAC SDU 发送至 RLC层, 包括:
所述接收端设备判断所述单播目的地址与所述接收端设备的标识是否一 致, 若一致, 则将所述 MAC PDU包含的 MAC SDU发送至所述 RLC层。
在第二个方面的第三种可能的实现方式中, 所述接收端设备接收发送端 设备发送的 MAC PDU, 包括:
所述接收端设备接收所述发送端设备通过多播发送方式发送的所述 MAC PDU, 所述 MAC PDU的包头中携带多播模式指示比特、所述发送端设 备的标识以及多播目的地址;
所述接收端设备将所述缓存实体中的所述 MAC PDU包含的 MAC SDU 发送至 RLC层, 包括:
所述接收端设备判断所述多播目的地址与所述接收端设备的组标识是否 一致, 若一致, 则将所述 MAC PDU对应的 MAC SDU发送至所述 RLC层。
结合第二个方面、 第二个方面的第一种、 第二种或第三种可能的实现方 式, 在第二个方面的第四种可能的实现方式中, 若所述 MAC PDU为所述发 端设备的对于无线链路控制层业务数据单元 RLC PDU分段得到的,则所述接 收端设备接收发送端设备发送的 MAC PDU, 包括:
所述接收端设备接收包头中添加分段比特、序号比特或级联比特的 MAC PDU,所述分段比特指示所述 MAC SDU为对所述 RLC PDU进行分段得到 的, 所述序号比特指示所述 MAC SDU在所述 RLC PDU中的位置, 所述 级联比特指示所述 MAC SDU后是否还存在 MAC SDU;
所述接收端设备将所述缓存实体中的所述 MAC PDU包含的 MAC SDU 发送至 RLC层之前, 包括:
所述接收端设备根据所述序号比特,对由同一个 RLC PDU分段得到的各 所述 MAC PDU包含的 MAC SDU进行排序, 将排序后的所述 MAC SDU发 送至 RLC层。
结合第二个方面、 第二个方面的第一种、 第二种、 第三种或第四种可能 的实现方式, 在第二个方面的第五种可能的实现方式中, 所述接收端设备将 所述缓存实体中的所述 MAC PDU包含的 MAC SDU发送至 RLC层, 包括: 所述接收端设备根据所述 MAC PDU的包头中携带的逻辑信道标识,将 所述 MAC PDU包含的 MAC SDU发送至所述 RLC层中与所述逻辑信道标识 对应的逻辑信道中。
第三个方面, 本发明实施例提供一种发送端设备, 包括:
设置模块, 用于根据媒质接入控制层业务数据单元 MAC SDU的逻辑信 道类别, 设置所述 MAC SDU的发送方式;
发送模块, 用于根据所述设置模块设置的所述发送方式, 对由所述 MAC
SDU得到的媒质接入控制层协议数据单元 MAC PDU进行发送。
在第三个方面的第一种可能的实现方式中, 所述设置模块, 具体用于 若所述 MAC SDU的逻辑信道类别为广播类别, 则在所述 MAC PDU的包头 中添加广播模式指示比特从而将所述 MAC SDU的发送方式设置为广播发送 方式。
在第三个方面的第二种可能的实现方式中, 所述设置模块, 具体用于 若所述 MAC SDU的逻辑信道类别为单播类别, 则在所述 MAC PDU的包 头中添加单播模式指示比特、 所述发送端设备的标识以及单播目的地址从而 将所述 MAC SDU的发送方式设置为单播发送方式。
在第三个方面的第三种可能的实现方式中, 所述设置模块, 具体用于 若所述 MAC SDU的逻辑信道类别为多播类别, 则在所述 MAC PDU的包 头中添加多播模式指示比特、 所述发送端设备的标识以及多播目的地址从而 将所述 MAC SDU的发送方式设置为多播发送方式。
结合第三个方面、第三方面的第一种、第二种或第三种可能的实现方式, 在第三个方面的第四种可能的实现方式中, 该发送端设备还包括:
添加模块, 用于若所述 MAC SDU为对所述发端设备的无线链路控制层 协议数据单元 RLC PDU分段得到的, 则在所述 MAC PDU的包头中添加分 段比特、 序号比特或级联比特, 所述分段比特指示所述 MAC SDU为对所述 RLC PDU进行分段得到的,所述序号比特指示所述 MAC SDU在所述 RLC PDU 中的位置, 所述级联比特指示所述 MAC SDU 后是否还存在 MAC SDU。
结合第三个方面、 第三个方面的第一种、 第二种、 第三种或第四种可能 的实现方式, 在第三个方面的第五种可能的实现方式中, 所述 MAC PDU的 包头中还携带逻辑信道标识。
第四个方面, 本发明实施例提供一种接收端设备, 包括:
接收模块, 用于接收发送端设备发送的媒质接入控制层协议数据单元 MAC PDU,所述 MAC PDU为所述发送端设备根据媒质接入控制层业务数据 单元 MAC SDU的逻辑信道类别设置的发送方式进行发送的;
发送模块, 用于将所述接收模块接收到的所述 MAC PDU发送至与所述 发送端设备对应的缓存实体中, 再将所述缓存实体中的所述 MAC PDU包含 的 MAC SDU发送至无线链路控制 RLC层。
在第四个方面的第一种可能的实现方式中, 所述接收模块, 具体用于接 收所述发送端设备通过广播发送方式发送的所述 MAC PDU。
在第四个方面的第二种可能的实现方式中, 该接收端设备还包括: 判断 模块;
所述接收模块, 具体用于接收所述发送端设备通过单播发送方式发送的 所述 MAC PDU, 所述 MAC PDU的包头中携带单播模式指示比特、 所述发 送端设备的标识以及单播目的地址;
所述判断模块, 用于判断所述单播目的地址与所述接收端设备的标识是 否一致; 所述发送模块, 具体用于若所述判断模块判断出所述单播目的地址与所 述接收端设备的标识一致, 则将所述 MAC PDU包含的 MAC SDU发送至所 述 RLC层。
在第四个方面的第三种可能的实现方式中, 该接收端设备还包括: 判断 模块;
所述接收模块, 具体用于接收所述发送端设备通过多播发送方式发送的 所述 MAC PDU, 所述 MAC PDU的包头中携带多播模式指示比特、 所述发 送端设备的标识以及多播目的地址;
所述判断模块, 用于判断所述多播目的地址与所述接收端设备的组标识 是否一致;
所述发送模块, 具体用于若所述判断模块判断出所述多播目的地址与所 述接收端设备的组标识一致, 则将所述 MAC PDU包含的 MAC SDU发送至 所述 RLC层。
结合第四个方面、 第四个方面的第一种、 第二种或第三种可能的实现方 式, 在第四个方面的第四种可能的实现方式中, 该接收端设备还包括: 排序 模块;
所述接收模块, 具体用于接收包头中添加分段比特、 序号比特或级联比 特的 MAC PDU, 所述分段比特指示所述 MAC SDU为对所述 RLC PDU进 行分段得到的, 所述序号比特指示所述 MAC SDU在所述 RLC PDU中的 位置, 所述级联比特指示所述 MAC SDU后是否还是存在 MAC SDU; 所述排序模块, 用于根据所述序号比特, 对由同一个 RLC PDU分段得 到的各所述 MAC PDU包含的 MAC SDU进行排序;
所述发送模块, 具体用于将所述排序模块排序后的所述 MAC SDU发送 至 RLC层。
结合第四个方面、 第四个方面的第一种、 第二种、 第三种或第四种可能 的实现方式, 在第四个方面的第五种可能的实现方式中, 所述发送模块, 具 体用于根据所述 MAC PDU的包头中携带的逻辑信道标识,将所述 MAC PDU 包含的 MAC SDU发送至所述 RLC层中与所述逻辑信道标识对应的逻辑信道 中。
第五个方面, 本发明实施例提供一种发送端设备, 包括: 处理器和存储 器, 所述存储器存储执行指令, 当所述发送端设备运行时, 所述处理器与所 述存储器之间通信, 所述处理器执行所述执行指令使得所述发送端设备执行 如上第一个方面、 第一个方面的第一种至第五种中任一种可能的实现方式。
第六个方面, 本发明实施例提供一种接收端设备, 包括: 处理器和存储 器, 所述存储器存储执行指令, 当所述接收端设备运行时, 所述处理器与所 述存储器之间通信, 所述处理器执行所述执行指令使得所述接收端设备执行 如上第二个方面、 第二个方面的第一种至第五种中任一种可能的实现方式。
本发明实施例提供一种数据传输方法、 发送端设备与接收端设备, 发送 端设备根据 MAC SDU的逻辑信道类别设置该 MAC SDU的发送方式, 根 据发送方式对该 MAC SDU进行发送, 使得接收端设备缓存该 MAC SDU 并处理, 若多个发送端设备同时向接收端设备发送 MAC PDU, 则接收端 设备将不同发送端设备发送的 MAC PDU缓存至各发送端设备对的缓存实 例中并处理。 该过程中, 接收端设备可同时处理多个发送端设备发送的 MAC SDU, 提高 D2D通信中数据传输的可靠性。 附图说明
图 1为本发明数据传输方法中用户面协议栈的示意图;
图 2为本发明数据传输方法实施例一的流程图;
图 3为本发明发送端设备的 MAC实体的结构示意图;
图 4为本发明数据传输方法中发送方式设置及地址添加过程的流程图; 图 5为本发明数据传输方法实施例二的流程图;
图 6为本发明接收端设备的 MAC实体的结构示意图;
图 7A为本发明数据传输方法中广播方式发送的 MAC PDU的包头格式 示意图;
图 7B为本发明数据传输方法中单播方式发送的 MAC PDU的包头格式示 意图;
图 7C为本发明数据传输方法中多播方式发送的 MAC PDU的包头格式示 意图;
图 8为本发明数据传输方法中 MAC-U实体的结构示意图;
图 9为本发明数据传输方法中 MAC-GU实体的结构示意图; 图 10为本发明数据传输方法中 MAC-U的另一个结构示意图;
图 11为本发明数据传输方法中增加了序号比特的 MAC PDU的包头格式 示意图;
图 12A为本发明数据传输方法中一个公共包头与子包头的格式示意图; 图 12B 为本发明数据传输方法中另一个公共包头与子包头的格式示意 图;
图 13A为本发明数据传输方法中对广播方式发送的 MAC PDU进行解复 用后的数据包格式示意图;
图 13B为本发明数据传输方法中对单播方式发送的 MAC PDU进行解复 用后的数据包格式示意图;
图 13C为本发明数据传输方法中对多播方式发送的 MAC PDU进行解复 用后的数据包格式示意图;
图 14为本发明发送端设备实施例一的结构示意图;
图 15为本发明发送端设备实施例二的结构示意图;
图 16为本发明接收端设备实施例一的结构示意图;
图 17为本发明接收端设备实施例二的结构示意图;
图 18为本发明发送端设备实施例三的结构示意图;
图 19为本发明接收端设备实施例三的结构示意图。 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做出创造性劳动前提 下所获得的所有其他实施例, 都属于本发明保护的范围。
本发明实施例中, 移动终端为能够同时进行传统的蜂窝通信与终端间直 通通信的蜂窝直通终端, 以下为描述清楚起见, 将发送数据的蜂窝直通终端 称之为发送端设备, 将接收数据的蜂窝直通终端称之为接收端设备。 D2D通 信过程中, 发送端设备与接收端设备的用户面协议栈如图 1所示, 图 1为本发 明数据传输方法中用户面协议栈的示意图。如图 1所示, 用户面协议栈从上往 下依次为分组数据汇聚协议 (Packet Data Convergence Protocol, PDCP) 层、 无线链路控制 (Radio Link Control, RLC) 层、 媒质接入控制 (Radio Link Control, MAC)层、 物理(Physical , PHY)层。 下面, 根据该用户面协议, 对本发明数据传输方法做详细说明。
图 2为本发明数据传输方法实施例一的流程图。本实施例的执行主体为发 送端设备, 适用于直通通信中多个发送端设备同时向一个接收端设备发送数 据的场景。 具体的, 本实施例包括如下歩骤:
101、发送端设备根据媒质接入控制层业务数据单元 MAC SDU的逻辑信 道类别, 设置 MAC SDU的发送方式。
一般来说, 每个移动终端具有一个 MAC实体, 发送端设备的 MAC实体 可实现逻辑信道到传输信道的映射, 映射后各传输信道分别对应不同的逻辑 信道。 其中, 逻辑信道(Logical Channel, LCH)是为了区分不同业务的数据 流而对数据流划分得到的, 包括广播控制信道 (Broadcast Control Channel, BCCH) 、 物理控制信道(Physical Control Channel, PCCH) 、 多播控制信道 ( Multicast Control Channel , MCCH ) 、 多播业务信道 ( Multicast Traffic Channel, MTCH) 、 公共控制信道(Common Control Channel, CCCH) 、 专 用控制信道(Dedicated Control Channel, DCCH)等; 传输信道包括广播信道 (Broadcast Channel , BCH)、 下行共享信道 ( Downlink Shared Channel , DL-SCH)、寻呼信道(Paging Channel, PCH)、上行共享信道( Uplink Shared Channel, UL-SCH) 、 随机接入信道 (Random Access Channe, RACH) 、 多 播信道(Multicast Channel, MCH)等。映射后, PCCH与 PCH对应, MCCT、 MTCH与 MCH对应。
本歩骤中, 发送端设备事先可根据 LCH的发送方式, 将 LCH划分为不 同的类别。 例如, BCCH、 PCCH都是以广播方式发送的, 则将其划分为广播 类别; MCCH、MTCH都是以多播方式发送的,则将其划分为多播类别; CCCH、 DCCH都是以单播方式发送的,则将其划分为单播类别。然后,根据 MAC SDU 所在的逻辑信道类别, 设置该 MAC SDU的发送方式。 例如, 若 MAC SDU 为 BCCH或 PCCH的数据,则将该 MAC SDU设置为多播发送方式;若 MAC SDU为 MCCH或 MTCH的数据, 则将该 MAC SDU设置为多播发送方式; 若该 MAC SDU为 CCCH或 DCCH的数据,则将该 MAC SDU设置为单播发 送方式。
102、 发送端设备根据发送方式, 对由 MAC SDU得到的媒质接入控制层 协议数据单元 MAC PDU进行发送。
由于在发送端, 每一层从高层接收 SDU, 并向底层输出 PDU。 因此, 本 歩骤中, 在对 MAC SDU按照逻辑信道类别进行发送方式的设置后, 发送端设 备根据发送方式, 对由 MAC SDU得到的 MAC PDU进行发送, 使得接收端设 备缓存该 MAC PDU并处理。该过程中, 若多个发送端设备同时向接收端设备 发送 MAC PDU, 则接收端设备将不同发送端设备发送的 MAC PDU缓存至各 发送端设备对于的缓存实例中并处理。
本发明实施例提供的数据传输方法,发送端设备根据 MAC SDU的逻辑信 道类别设置该 MAC SDU的发送方式,根据发送方式对该 MAC SDU进行发送, 使得接收端设备缓存该 MAC SDU并处理,若多个发送端设备同时向接收端设 备发送 MAC PDU, 则接收端设备将不同发送端设备发送的 MAC PDU缓存至 各发送端设备对的缓存实例中并处理。 该过程中, 接收端设备可同时处理多 个发送端设备发送的 MAC SDU, 提高 D2D通信中数据传输的可靠性。
D2D通信中, MAC层实体把 PHY层的数据经过处理后发送给 RLC层, 由 RLC层针对每个业务数据流封装数据包并进行可靠性传输。 由于 RLC层 的实体对应逻辑信道, MAC层将 PHY层的数据处理成传输信道来传输数据。 因此, 发送端设备的 MAC实体需要具有把 RLC层的逻辑信道映射到传输信 道的功能、 将多个逻辑信道复用成一个传输信道的功能, 从而最大限度的利 用空口资源。 具体的, 可参见图 3, 图 3为本发明发送端设备的 MAC实体的 结构示意图。
如图 3所示, 发送端设备的 MAC实体具有控制模块, 通过控制模块实 现逻辑信道优先处理功能、 复用功能、 包头处理、 加组控制等。 下面, 结合 图 3对该些功能进行详细阐述。
如图 3所示, LCH1、 LCH2、 LCH3的 MAC SDU经过逻辑信道优先处 理、 复用及包头处理后, 映射到 D2D SCH; 上行控制信道 (Uplink Control Channel, UCCH) 是发送端设备加入无线组的一个逻辑信道, 其对应的传输 信道为 D2D PRACH; 组公告信道 (Group Announcement channel, GACH) 对应的传输信道为 D2D GACH。 一般来说, 公共事件中各移动终端归属于不同的无线组, 例如, 可属于 救援组或指挥组, 或属于不同的救援组等。 属于同一个无线组的多个移动终 端中, 至少一个移动终端为组头节点, 剩余移动终端为组员节点。 请参照头
3, 若发送端设备为组头节点, 则其 RLC层实体具有一个 GACH逻辑信道, 该逻辑信道的信息在 MAC层透传给 PHY层,组头节点通过 GACH周期性的 发送"组宣告"信息, 使得其覆盖范围内的其他节点得知该组头节点的存在以 加入该组。 另外, 组头节点还可以调度其他组员节点的数据发送来更好的利 用有限的无线资源, 从而避免干扰和碰撞。 若发送端设备为组员节点, 则其 可通过 UCCH发送初始接入请求给组头节点, 以便自己成为一个无线组的组 员。 需要说明的是, 由于一个移动终端可同时加入两个以上的无线组。 因此, 在某些无线组中, 发送端设备可为组头节点, 同时, 在其他无线组中, 发送 端设备可为组员节点。
D2D通信中, 发送端设备向接收端设备发送视频、 图片等业务数据, 每 种业务至少有一个数据流, 例如视频业务同时具有语音和图像两种数据流, 每个数据流都会对应一个逻辑信道(即一个 RLC实例) 。 因此, 当多个逻辑 信道的数据都需要发送时, MAC层会在无线资源比较充裕的情况下, 以此传 输多个逻辑信道的数据从而具有复用功能。 进一歩的, 为了满足每个业务数 据的服务质量, 在多个逻辑信道复用的时候, MAC层对各逻辑信道进行优先 级排序, 从而具有逻辑信道优先处理功能。
多个逻辑信道的数据包在经过优先级处理、 复用之后, 然后进入包头处 理阶段, 随着 MAC SDU—起进入包头处理的还有各个逻辑信道的逻辑信道 类别, 若逻辑信道类别是单播类别和多播类别, 还有单播目的地址和多播目 的地址。 具体的, 可参见图 4, 图 4为本发明数据传输方法中发送方式设置 及地址添加过程的流程图, 本实施例中适用于一个 MAC PDU中只包含一个 MAC SDU; 或者, 一个 MAC PDU中包含多个 MAC SDU, 但各 MAC SDU 的逻辑信道类型一致且目的地址一致的场景, 其包括如下歩骤:
201、 MAC实体收到携带逻辑信道类别的 MAC SDU。
202、 判断 MAC SDU的逻辑信道类别是否为广播类别, 若是, 则执行歩 骤 203; 否则, 执行歩骤 204。
MAC实体可根据配置参数等来判断逻辑信道类别, 例如, 分别用 0、 1、 2表示逻辑信道的类别为广播类别、 单播类别和多播类别。
203、在 MAC PDU的包头中添加广播模式指示比特从而将 MAC SDU的 发送方式设置为广播发送方式。
由于在发送端, 每一层从高层接收 SDU, 并向底层输出 PDU。 因此, 本歩骤中, 若 MAC实体判断出逻辑信道类别为广播类别, 则在 MAC PDU 的包头中添加广播模式指示比特, 由于是广播模式, 因此不必添加目的地址, 包头处理完毕后, 将该 MAC PDU发送给 PHY层。
204、 判断 MAC SDU的逻辑信道类别是否为单播类别, 若是, 则执行歩 骤 205; 否则, 执行歩骤 206。
205、 在 MAC PDU的包头中添加单播模式指示比特、 发送端设备的标 识以及单播目的地址从而将 MAC SDU的发送方式设置为单播发送方式。
若 MAC实体判断出逻辑信道类别为单播类别, 则在包头中添加单播模 式指示比特, 并添加单播目的地址。 具体的, 单播目的地址分为两类, 第一 类为: 若目的地址对应的移动终端与发送端设备属于同一个无线组, 则可使 用组内的短地址来描述目的地址; 第二类为: 若目的地址对应的移动终端与 发送端设备不属于同一个无线组, 则需要添加全局地址, 即目标移动终端的 组标识和组内地址。包头处理完毕后,由于在发送端,每一层从高层接收 SDU, 并向底层输出 PDU。 因此, 将该处理后的 MAC PDU发送给 PHY层。
206、 在 MAC PDU的包头中添加多播模式指示比特、 发送端设备的标 识以及多播目的地址从而将 MAC SDU的发送方式设置为多播发送方式。
若逻辑信道的类别不是广播类别与单播类别, 则为多播类别, 此时, 在 包头中添加多播模式指示比特及多播目的地址, 其中, 多播目的地址通常认 为是组标识。 包头处理完毕后, 将该处理后的 MAC PDU发送给 PHY层。
需要说明的是, 当一个 MAC PDU中只包含一个 MAC SDU时, 上述的 在 MAC PDU的包头中添加广播模式指示比特、 单播模式指示比特、 多播模 式指示比特等, 是指在 MAC PDU的包头中添加; 而当一个 MAC PDU中包 含多个 MAC SDU, 上述的在 MAC PDU的包头中添加广播模式指示比特、 单播模式指示比特、 多播模式指示比特等, 是指在 MAC PDU的子包头中添 加。
上述图 4包头处理阶段中, 根据逻辑信道类别对包头进行处理, 实现组 播、 单播与广播的功能, 且包头的开销最小。
可选的, 上述实施例一中, 若 RLC层的 RLC PDU比较大, 需要分成多 个 MAC PDU传输时, 发送端设备还需要在 MAC PDU的包头中添加分段比 特、 序号比特或级联比特, 其中, 分段比特指示 MAC SDU为对 RLC PDU 进行分段得到的, 序号比特指示 MAC SDU在 RLC PDU中的位置, 级联 比特指示包头后是包头还是 MAC SDU。 如此一来, 接收端设备接收到该 MAC PDU后,若确定出自己的数据包,则根据 SN将属于同一个 RLC PDU 的 MAC PDU组合, 还原出 RLC PDU。
可选的, 上述实施例一中, MAC PDU的包头中还携带逻辑信道标识。 如此一来, 接收端设备接收到该 MAC PDU后, 由于在接收端, 每一层从底 层接收 PDU, 并向高层输出 SDU。 因此, 若确定出自己的数据包, 则根据 逻辑信道标识将该 MAC PDU包含的 MAC SDU传输至相应的 RLC实体。
图 5为本发明数据传输方法实施例二的流程图。 本实施例的执行主体 为接收端设备, 适用于直通通信中多个发送端设备同时向一个接收端设备 发送数据的场景。 具体的, 本实施例包括如下歩骤:
301、 接收端设备接收发送端设备发送的媒质接入控制层业务数据单元 MAC PDU, MAC PDU为发送端设备根据 MAC SDU的逻辑信道类别设置的 发送方式进行发送的。
接收端设备的物理层接收发送端设备根据 MAC SDU的逻辑信道类别设 置的发送方式发送的 MAC PDU。
302、 接收端设备将 MAC PDU发送至与发送端设备对应的缓存实体中。 接收端设备为每一个发送端设备建议一个 MAC-U实体, 即缓存实体, 在接收到 MAC PDU后,接收端设备将该 MAC PDU送入相应的缓存实体中。 若发送端设备为多个, 则将各发送端设备发送的 MAC PDU送入相应的缓存 实体中。
303、接收端设备将缓存实体中 MAC PDU包含的 MAC SDU发送至无线 链路控制 RLC层。
接收端设备对缓存实体中的 MAC PDU进行解复用、 去包头等处理后, 根据逻辑信道标识, 将处理后的 MAC SDU送入到对应的 RLC实体中。
本发明实施例提供的数据传输方法, 接收端设备接收到发送端设备根据 MAC PDU 的逻辑信道类别设置的发送方式发送的 MAC PDU后, 缓存该 MAC PDU并处理, 若多个发送端设备同时向接收端设备发送 MAC PDU, 则接收端设备将不同发送端设备发送的 MAC PDU缓存至各发送端设备对 于的缓存实例中并处理。 该过程中, 接收端设备可同时处理多个发送端设 备发送的 MAC PDU, 提高 D2D通信中数据传输的可靠性。
图 6为本发明接收端设备的 MAC实体的结构示意图。 如图 6所示, 接 收端设备的 MAC实体具有控制模块, 通过控制模块为每个发送端设备建立 缓存实体 MAC-U。数据传输过程中, PHY层在接收到发送端设备发送的 MAC PDU后,经由分发模块发送至相应的 MAC-U, 由 MAC-U进行包头处理等发 送至对应的逻辑信道。 下面, 结合图 6对接收端设备的 MAC实体的分发模 块、 缓存实体等进行详细阐述。
首先, 对分发模块做详细说明。 具体的, 由于接收端设备接收到的 MAC PDU的包头中都携带发送端设备的标识、 逻辑信道标识及传输模式指示比特 "Β/Ρ/Μ'Ό 其中, Β为广播发送方式, 表示发送端设备广播发送给所有能够接 收到他的数据包接收端设备; Ρ 为单播发送方式, 表示发送端设备将 MAC PDU发送给特定的接收者; M为多播发送方式,表示发送端设备将 MAC PDU 发送给具有一定特征的多个接收者。 因此, 分发模块可根据 MAC PDU的包 头中的信息, 将不同发送端设备发送的 MAC PDU发送至对应的 MAC-U中 的功能。 具体的, 可参见图 7A〜图 7C。
图 7A为本发明数据传输方法中广播方式发送的 MAC PDU的包头格式 示意图。 如图 7A所示, 传输模式指示比特" B/P/M"为 B时, 包头不含接收者 的地址信息或标识, 只要能够在物理层正确接收到数据后就可进行后续的处 理。 此时, 分发模块根据包头中携带的发送端设备的标识, 进行分发, 即将 数据包送入与发送端设备的标识对应的 MAC-U实体中。
图 7B为本发明数据传输方法中单播方式发送的 MAC PDU的包头格式示 意图。 如图 7B所示, 传输模式指示比特" B/P/M"为 P时, 包头需要包含接收 者的地址信息或者标识。 此时, 分发模块确定出传输模式指示比特为 P后, 会继续对包头进行读取, 获取到单播目的地址, 并将单播目的地址与自身的 标识进行比较。 若两个标识一致, 则认为自己所在的接收端设备即为目标接 收端设备, 将数据包送入与发送端设备的标识对应的 MAC-U实体中; 否则, 若不一致, 则认为自己所在的接收端设备不是这个数据包的接收者, 分发模 块将该数据包丢弃。需要说明的是, 图 7B所示为一个数据包中具有多个逻辑 信道的数据单元。
图 7C为本发明数据传输方法中多播方式发送的 MAC PDU的包头格式示 意图。如图 7C所示, 传输模式指示比特" B/P/M"为 M时, 包头需要包含接收 者的地址信息或者标识。 此时, 分发模块确定出传输模式指示比特为 M后, 会继续对包头进行读取,获取到多播目的地址,例如目的组标识(target group ID) , 并将该组标识与自身所在的组的组标识进行比较。 若两个组标识一致, 则认为自己所在的接收端设备即为目标接收端设备, 将数据包送入与发送端 设备的标识对应的 MAC-U实体中; 否则, 若不一致, 则认为自己所在的接 收端设备不是这个数据包的接收者, 分发模块将该数据包丢弃。
其次, 对缓存实例, 即 MAC-U做详细说明。 具体的, 可参见图 8, 图 8 为本发明数据传输方法中 MAC-U实体的结构示意图。 如图 8所示, 接收端 设备对每个发送端设备监理 MAC-U, 由该 MAC-U对数据包进行解复用、 去 除 MAC层的包头等得到 RLC PDU,然后根据逻辑信道标识,将每个 RLC PDU 发送至对应的 RLC实体中。
另外, 由于接收端设备同样也可以加入多个无线组。 当接收端设备作为 组员节点时, MAC实体还建立一个 MAC-GA实例, 具体的, 可参见图 9, 图 9为本发明数据传输方法中 MAC-GU实体的结构示意图。 该 MAC-GA实 例与 GACH逻辑信道对应, 用于接收组头节点发送的"组宣告"信息。 GACH 信道在物理层具有独特的物理资源, 该独特的物理资源例如为频率上独立的 资源或时间上独立的资源。 即使接收端节点同时加入了多个无线组, 则因为 每个组的"组宣告 "信息也能够通过物理资源进行区分, 即物理层能够区分一 个数据是否是 GACH的数据, 如此一来, 接收端设备的物理层在接收到属于 GACH 信道的数据后, 直接将该数据送入 GACH-GA 实体中。 然后, 由 GACH-GA不对该数据进行任何包头添加等, 直接融入 GACH对应的逻辑信 道所在的 RLC实体中。
在本发明数据传输方法实施例三中, MAC SDU例如为发端设备对无线 链路控制层业务数据单元 RLC PDU进行分段得到的,此时,接收端设备接收 到的 MAC PDU的包头中添加了分段比特、 序号比特或级联比特。 其中, 分 段比特指示 MAC SDU为对 RLC PDU进行分段得到的,序号比特指示 MAC SDU在 RLC PDU中的位置,级联比特指示 MAC PDU后是否还存在 MAC SDU。接收端设备中建立的 MAC-U实体根据序号比特,对由同一个 RLC PDU 分段得到的各 MAC SDU进行排序, 将排序后的 MAC SDU发送至 RLC层。 该过程中, MAC-U的结构示意图如图 10所示, 图 10为本发明数据传输方法 中 MAC-U的另一个结构示意图; MAC的包头如图 11所示, 图 11为本发明 数据传输方法中增加了序号比特的 MAC PDU的包头格式示意图。如图 11所 示, S为分段比特, 表示本次的数据包是否为分段数据包, E或 E1为包头指 示比特, 标识本比特后面是数据包头还是数据包本身。
D2D通信过程中, 发送端设备可能会一次发送多个逻辑信道的数据包, 此时, 该些数据包的包头中发送端设备的标识相同, 而传输模式指示比特、 逻辑信道标识等不同。 为描述清楚起见, 将包头分为两部分, 将各包头中的 发送端设备的标识称之为公共包头, 将各包头中除发送端设备的标识之外的 部分称之为子包头, 多个数据包的子包头一般不同。 具体的, 可参见图 12A 与图 12B , 图 12A为本发明数据传输方法中一个公共包头与子包头的格式示 意图, 图 12B为本发明数据传输方法中另一个公共包头与子包头的格式示意 图。
请同时参照图 12A与图 12B , 假设发送端设备发送的两个数据包的包头 格式分别如图 12A与图 12B所示, 则该两个包头的发送端设备的标识相同, 为公共包头, 而子包头分别不同, 即图 12A中的第二个字节与图 12B中的第 二个字节到第六个字节不同。
上述图 6所示架构中, 对于接收到的 MAC PDU, 若接收端设备的分发 模块判断出该 MAC PDU 为自己的数据包, 则发送至对应的 MAC-U, 由 MAC-U进行解复用并根据逻辑信道标识发送至对应的 RLC实体; 否则, 若 接收端设备的分发模块判断出该 MAC PDU不是自己的数据包, 则将数据包 进行丢弃。 然而, 本发明并不以此为限制, 在其他可行的实施方式中, 也可 以分发模块先对各 MAC PDU进行解复用, 根据 MAC PDU的每个子包头确 认自己是否为正确的接收者, 若是, 则将各数据包发送至 MAC-U实体; 否 贝 lj, 将数据包丢弃。 此时, MAC-U实体中的解复用功能取消。 该过程中, 分 发模块进行解复用得到的数据包如图 13A~13C所示。图 13A为本发明数据传 输方法中对广播方式发送的 MAC PDU进行解复用后的数据包格式示意图, 图 13B为本发明数据传输方法中对单播方式发送的 MAC PDU进行解复用后 的数据包格式示意图, 图 13C 为本发明数据传输方法中对多播方式发送的 MAC PDU进行解复用后的数据包格式示意图。
另外, 在其他可能的实施方式中, 还可以是分发模块仅根据发送端设备 的标识将 MAC PDU发送至 MAC-U中, 由 MAC-U对各 MAC-PDU进行解 复用。 然后, MAC-U根据子包头对确认自己是否为正确的接收者, 若是, 则 将各数据包发送至 MAC-U实体; 否则, 将数据包丢弃。
图 14为本发明发送端设备实施例一的结构示意图。本实施例提供的发送 端设备是与本发明图 2实施例对应的装置实施例, 具体实现过程在此不再赘 述。 具体的, 本实施例提供的发送端设备 100具体包括:
设置模块 11, 用于根据媒质接入控制层业务数据单元 MAC SDU的逻 辑信道类别, 设置 MAC SDU的发送方式;
发送模块 12, 用于根据设置模块 11设置的发送方式, 对由 MAC SDU 得到的媒质接入控制层协议数据单元 MAC PDU进行发送。
本发明实施例提供的发送端设备,根据 MAC SDU的逻辑信道类别设置 该 MAC SDU的发送方式, 根据发送方式对该 MAC SDU进行发送, 使得 接收端设备缓存该 MAC SDU并处理, 若多个发送端设备同时向接收端设 备发送 MAC PDU, 则接收端设备将不同发送端设备发送的 MAC PDU缓 存至各发送端设备对的缓存实例中并处理。 该过程中, 接收端设备可同时 处理多个发送端设备发送的 MAC SDU,提高 D2D通信中数据传输的可靠 性。
可选的, 本发明一实施例中, 设置模块 11, 具体用于若 MAC SDU的逻 辑信道类别为广播类别, 则在 MAC PDU的包头中添加广播模式指示比特从 而将 MAC SDU的发送方式设置为广播发送方式。
可选的, 本发明一实施例中, 设置模块 11, 具体用于若 MAC SDU的逻 辑信道类别为单播类别, 则在 MAC PDU的包头中添加单播模式指示比特、 发送端设备的标识以及单播目的地址从而将 MAC SDU的发送方式设置为单 播发送方式。
可选的, 本发明一实施例中, 设置模块 11, 具体用于若 MAC SDU的逻 辑信道类别为多播类别, 则在 MAC PDU的包头中添加多播模式指示比特、 发送端设备的标识以及多播目的地址从而将 MAC SDU的发送方式设置为多 播发送方式。
图 15为本发明发送端设备实施例二的结构示意图。 如图 15所示, 本实 施例的发送端设备 100在图 14所示结构的基础上, 进一歩的, 还包括:
添加模块 13, 用于若 MAC SDU为对发端设备的无线链路控制层协议数 据单元 RLC PDU分段得到的, 则在 MAC PDU的包头中添加分段比特、 序 号比特或级联比特, 分段比特指示 MAC SDU为对 RLC PDU进行分段得到 的, 序号比特指示 MAC SDU在 RLC PDU中的位置, 级联比特指示 MAC SDU后是否还存在 MAC SDU。
可选的, 本发明一实施例中, MAC PDU的包头中还携带逻辑信道标识。 图 16为本发明接收端设备实施例一的结构示意图。本实施例提供的接收 端设备是与本发明图 5实施例对应的装置实施例, 具体实现过程在此不再赘 述。 具体的, 本实施例提供的接收端设备 200具体包括:
接收模块 21, 用于接收发送端设备发送的媒质接入控制层协议数据单元
MAC PDU, MAC PDU为发送端设备根据媒质接入控制层业务数据单元 MAC SDU的逻辑信道类别设置的发送方式进行发送的;
发送模块 22, 用于将接收模块 21接收到的 MAC PDU发送至与发送端 设备对应的缓存实体中, 再将缓存实体中的 MAC PDU包含的 MAC SDU发 送至无线链路控制 RLC层。
本发明实施例提供的接收端设备, 在接收到发送端设备根据 MAC PDU 的逻辑信道类别设置的发送方式发送的 MAC PDU后, 缓存该 MAC PDU并 处理, 若多个发送端设备同时向接收端设备发送 MAC PDU, 则接收端设 备将不同发送端设备发送的 MAC PDU缓存至各发送端设备对于的缓存实 例中并处理。 该过程中, 接收端设备可同时处理多个发送端设备发送的 MAC PDU, 提高 D2D通信中数据传输的可靠性。
可选的, 在本发明一实施例中, 接收模块 21, 具体用于接收发送端设备 通过广播发送方式发送的 MAC PDU。
图 17为本发明接收端设备实施例二的结构示意图。 如图 17所示, 本实 施例的接收端设备 200在图 16所示结构的基础上, 进一歩的, 还包括: 判断 模块 23; 接收模块 21, 具体用于接收发送端设备通过单播发送方式发送的 MAC PDU, MAC PDU的包头中携带单播模式指示比特、 发送端设备的标识 以及单播目的地址; 判断模块 23, 用于判断单播目的地址与接收端设备的标 识是否一致; 发送模块 22, 具体用于若判断模块 23判断出单播目的地址与 接收端设备的标识一致, 则将 MAC PDU包含的 MAC SDU发送至 RLC层。
可选的, 在本发明一实施例中, 接收模块 21, 具体用于接收发送端设备 通过多播发送方式发送的 MAC PDU, MAC PDU的包头中携带多播模式指示 比特、 发送端设备的标识以及多播目的地址; 判断模块 23, 用于判断多播目 的地址与接收端设备的组标识是否一致; 发送模块 22, 具体用于若判断模块 23判断出多播目的地址与接收端设备的组标识一致, 则将 MAC PDU对应的 MAC SDU发送至 RLC层。
在请参照图 17, 可选的, 在本发明一实施例中, 接收端设备还包括: 排 序模块 24; 接收模块 21, 具体用于接收包头中添加分段比特、 序号比特或级 联比特的 MAC PDU, 分段比特指示 MAC SDU为对 RLC PDU进行分段得 到的,序号比特指示 MAC SDU在 RLC PDU中的位置,级联比特指示 MAC SDU后是否还存在 MAC SDU; 排序模块 24, 用于根据序号比特, 对由同 一个 RLC PDU分段得到的各 MAC PDU包含的 MAC SDU进行排序; 发送 模块 22, 具体用于将排序模块 24排序后的 MAC SDU发送至 RLC层。
可选的, 在本发明一实施例中, 发送模块 22, 具体用于根据 MAC PDU 的包头中携带的逻辑信道标识, 将 MAC PDU包含的 MAC SDU发送至 RLC 层中与逻辑信道标识对应的逻辑信道中。
图 18为本发明发送端设备实施例三的结构示意图。 如图 18所示, 本实 施例提供的发送端设备 300, 包括: 处理器 31和存储器 32。 发送端设备 300还可以包括发射器 33、接收器 34。发射器 33和接收器 34可以和处理 器 31相连。 其中, 发射器 33用于发送数据或信息, 接收器 34用于接收 数据或信息, 存储器 32存储执行指令, 当发送端设备 300运行时, 处理 器 31与存储器 32之间通信, 处理器 31调用存储器 32中的执行指令, 用 于执行图 2所示方法实施例, 其实现原理和技术效果类似, 此处不再赘述。
图 19为本发明接收端设备实施例三的结构示意图。 如图 19所示, 本实 施例提供的接收端设备 400, 包括: 处理器 41和存储器 42。 接收端设备 400还可以包括发射器 43、接收器 44。发射器 43和接收器 44可以和处理 器 41相连。 其中, 发射器 43用于发送数据或信息, 接收器 44用于接收 数据或信息, 存储器 42存储执行指令, 当接收端设备 400运行时, 处理 器 41与存储器 42之间通信, 处理器 41调用存储器 42中的执行指令, 用 于执行图 5所示方法实施例, 其实现原理和技术效果类似, 此处不再赘述。
本领域普通技术人员可以理解: 实现上述方法实施例的全部或部分歩骤 可以通过程序指令相关的硬件来完成, 前述的程序可以存储于一计算机可读 取存储介质中, 该程序在执行时, 执行包括上述方法实施例的歩骤; 而前述 的存储介质包括: ROM、 RAM,磁碟或者光盘等各种可以存储程序代码的介 质。
最后应说明的是: 以上各实施例仅用以说明本发明的技术方案, 而非对 其限制; 尽管参照前述各实施例对本发明进行了详细的说明, 本领域的普通 技术人员应当理解:其依然可以对前述各实施例所记载的技术方案进行修改, 或者对其中部分或者全部技术特征进行等同替换; 而这些修改或者替换, 并 不使相应技术方案的本质脱离本发明各实施例技术方案的范围。

Claims

权 利 要 求 书
1、 一种数据传输方法, 其特征在于, 包括:
发送端设备根据媒质接入控制层业务数据单元 MAC SDU的逻辑信道类 另 lj, 设置所述 MAC SDU的发送方式;
所述发送端设备根据所述发送方式, 对由所述 MAC SDU得到的媒质接 入控制层协议数据单元 MAC PDU进行发送。
2、 根据权利要求 1 所述的方法, 其特征在于, 所述发送端设备根据 MAC SDU的逻辑信道类别, 设置所述 MAC SDU的发送方式, 包括:
若所述 MAC SDU的逻辑信道类别为广播类别, 则在所述 MAC PDU的 包头中添加广播模式指示比特从而将所述 MAC SDU的发送方式设置为广播 发送方式。
3、 根据权利要求 1所述的方法, 其特征在于, 所述发送端设备根据 MAC SDU的逻辑信道类别, 设置所述 MAC SDU的发送方式, 包括:
若所述 MAC SDU的逻辑信道类别为单播类别, 则在所述 MAC PDU 的包头中添加单播模式指示比特、 所述发送端设备的标识以及单播目的地址 从而将所述 MAC SDU的发送方式设置为单播发送方式。
4、 根据权利要求 1所述的方法, 其特征在于, 所述发送端设备根据 MAC SDU的逻辑信道类别, 设置所述 MAC SDU的发送方式, 包括:
若所述 MAC SDU的逻辑信道类别为多播类别, 则在所述 MAC PDU 的包头中添加多播模式指示比特、 所述发送端设备的标识以及多播目的地址 从而将所述 MAC SDU的发送方式设置为多播发送方式。
5、根据权利要求 1~4任一项所述的方法,其特征在于,若所述 MAC SDU 为对所述发端设备的无线链路控制层协议数据单元 RLC PDU分段得到的,则 所述方法还包括:
所述发送端设备在所述 MAC PDU的包头中添加分段比特、序号比特或 级联比特, 所述分段比特指示所述 MAC SDU为对所述 RLC PDU进行分段 得到的, 所述序号比特指示所述 MAC SDU在所述 RLC PDU中的位置, 所述级联比特指示所述 MAC SDU后是否还存在 MAC SDU。
6、根据权利要求 1~5任一项所述的方法,其特征在于,所述 MAC PDU 的包头中还携带逻辑信道标识。
7、 一种数据传输方法, 其特征在于, 包括:
接收端设备接收发送端设备发送的媒质接入控制层协议数据单元 MAC PDU, 所述 MAC PDU为所述发送端设备根据媒质接入控制层业务数据单元 MAC SDU的逻辑信道类别设置的发送方式进行发送的;
所述接收端设备将所述 MAC PDU发送至与所述发送端设备对应的缓存 实体中;
所述接收端设备将所述缓存实体中所述 MAC PDU包含的 MAC SDU发 送至无线链路控制 RLC层。
8、 根据权利要求 7所述的方法, 其特征在于, 所述接收端设备接收发送 端设备发送的 MAC PDU, 包括:
所述接收端设备接收所述发送端设备通过广播发送方式发送的所述 MAC PDU。
9、 根据权利要求 7所述的方法, 其特征在于, 所述接收端设备接收发送 端设备发送的 MAC PDU, 包括:
所述接收端设备接收所述发送端设备通过单播发送方式发送的所述
MAC PDU, 所述 MAC PDU的包头中携带单播模式指示比特、所述发送端设 备的标识以及单播目的地址;
所述接收端设备将所述缓存实体中的所述 MAC PDU包含的 MAC SDU 发送至 RLC层, 包括:
所述接收端设备判断所述单播目的地址与所述接收端设备的标识是否一 致, 若一致, 则将所述 MAC PDU对应的 MAC SDU发送至所述 RLC层。
10、 根据权利要求 7所述的方法, 其特征在于, 所述接收端设备接收发 送端设备发送的 MAC PDU, 包括:
所述接收端设备接收所述发送端设备通过多播发送方式发送的所述 MAC PDU, 所述 MAC PDU的包头中携带多播模式指示比特、所述发送端设 备的标识以及多播目的地址;
所述接收端设备将所述缓存实体中的所述 MAC PDU包含的 MAC SDU 发送至 RLC层, 包括:
所述接收端设备判断所述多播目的地址与所述接收端设备的组标识是否 一致, 若一致, 则将所述 MAC PDU对应的 MAC SDU发送至所述 RLC层。
11、 根据权利要求 7~10任一项所述的方法, 其特征在于, 若所述 MAC PDU为所述发端设备的对于无线链路控制层业务数据单元 RLC PDU分段得 到的, 则所述接收端设备接收发送端设备发送的 MAC PDU, 包括:
所述接收端设备接收包头中添加分段比特、序号比特或级联比特的 MAC PDU,所述分段比特指示所述 MAC SDU为对所述 RLC PDU进行分段得到 的, 所述序号比特指示所述 MAC SDU在所述 RLC PDU中的位置, 所述 级联比特指示所述 MAC SDU后是否还存在 MAC SDU;
所述接收端设备将所述缓存实体中的所述 MAC PDU包含的 MAC SDU 发送至 RLC层之前, 包括:
所述接收端设备根据所述序号比特,对由同一个 RLC PDU分段得到的各 所述 MAC PDU包含的 MAC SDU进行排序, 将排序后的所述 MAC SDU发 送至 RLC层。
12、 根据权利要求 7~11任一项所述的方法, 其特征在于, 所述接收端设 备将所述缓存实体中的所述 MAC PDU包含的 MAC SDU发送至 RLC层,包 括:
所述接收端设备根据所述 MAC PDU的包头中携带的逻辑信道标识,将 所述 MAC PDU包含的 MAC SDU发送至所述 RLC层中与所述逻辑信道标识 对应的逻辑信道中。
13、 一种发送端设备, 其特征在于, 包括:
设置模块, 用于根据媒质接入控制层业务数据单元 MAC SDU的逻辑信 道类别, 设置所述 MAC SDU的发送方式;
发送模块, 用于根据所述设置模块设置的所述发送方式, 对由所述 MAC SDU得到的媒质接入控制层协议数据单元 MAC PDU进行发送。
14、 根据权利要求 13所述的发送端设备, 其特征在于,
所述设置模块,具体用于若所述 MAC SDU的逻辑信道类别为广播类别, 则在所述 MAC PDU的包头中添加广播模式指示比特从而将所述 MAC SDU 的发送方式设置为广播发送方式。
15、 根据权利要求 13所述的发送端设备, 其特征在于,
所述设置模块, 具体用于若所述 MAC SDU的逻辑信道类别为单播类 别, 则在所述 MAC PDU的包头中添加单播模式指示比特、所述发送端设备 的标识以及单播目的地址从而将所述 MAC SDU的发送方式设置为单播发送 方式。
16、 根据权利要求 13所述的发送端设备, 其特征在于,
所述设置模块, 具体用于若所述 MAC SDU的逻辑信道类别为多播类 别, 则在所述 MAC PDU的包头中添加多播模式指示比特、所述发送端设备 的标识以及多播目的地址从而将所述 MAC SDU的发送方式设置为多播发送 方式。
17、 根据权利要求 13~16任一项所述的发送端设备, 其特征在于, 还包 括:
添加模块, 用于若所述 MAC SDU为对所述发端设备的无线链路控制层 协议数据单元 RLC PDU分段得到的, 则在所述 MAC PDU的包头中添加分 段比特、 序号比特或级联比特, 所述分段比特指示所述 MAC SDU为对所述 RLC PDU进行分段得到的,所述序号比特指示所述 MAC SDU在所述 RLC PDU 中的位置, 所述级联比特指示所述 MAC SDU 后是否还存在 MAC SDU。
18、 根据权利要求 13~17任一项所述的发送端设备, 其特征在于, 所述 MAC PDU的包头中还携带逻辑信道标识。
19、 一种接收端设备, 其特征在于, 包括:
接收模块, 用于接收发送端设备发送的媒质接入控制层协议数据单元 MAC PDU,所述 MAC PDU为所述发送端设备根据媒质接入控制层业务数据 单元 MAC SDU的逻辑信道类别设置的发送方式进行发送的;
发送模块, 用于将所述接收模块接收到的所述 MAC PDU发送至与所述 发送端设备对应的缓存实体中, 再将所述缓存实体中的所述 MAC PDU包含 的 MAC SDU发送至无线链路控制 RLC层。
20、 根据权利要求 19所述的接收端设备, 其特征在于,
所述接收模块, 具体用于接收所述发送端设备通过广播发送方式发送的 所述 MAC PDU。
21、 根据权利要求 19所述的接收端设备, 其特征在于, 还包括: 判断模 块;
所述接收模块, 具体用于接收所述发送端设备通过单播发送方式发送的 所述 MAC PDU, 所述 MAC PDU的包头中携带单播模式指示比特、 所述发 送端设备的标识以及单播目的地址;
所述判断模块, 用于判断所述单播目的地址与所述接收端设备的标识是 否一致;
所述发送模块, 具体用于若所述判断模块判断出所述单播目的地址与所 述接收端设备的标识一致, 则将所述 MAC PDU包含的 MAC SDU发送至所 述 RLC层。
22、 根据权利要求 19所述的接收端设备, 其特征在于, 还包括: 判断模 块;
所述接收模块, 具体用于接收所述发送端设备通过多播发送方式发送的 所述 MAC PDU, 所述 MAC PDU的包头中携带多播模式指示比特、 所述发 送端设备的标识以及多播目的地址;
所述判断模块, 用于判断所述多播目的地址与所述接收端设备的组标识 是否一致;
所述发送模块, 具体用于若所述判断模块判断出所述多播目的地址与所 述接收端设备的组标识一致, 则将所述 MAC PDU包含的 MAC SDU发送至 所述 RLC层。
23、 根据权利要求 19~22任一项所述的接收端设备, 其特征在于, 还包 括: 排序模块;
所述接收模块, 具体用于接收包头中添加分段比特、 序号比特或级联比 特的 MAC PDU, 所述分段比特指示所述 MAC SDU为对所述 RLC PDU进 行分段得到的, 所述序号比特指示所述 MAC SDU在所述 RLC PDU中的 位置, 所述级联比特指示所述 MAC SDU后是否还存在 MAC SDU;
所述排序模块, 用于根据所述序号比特, 对由同一个 RLC PDU分段得 到的各所述 MAC PDU包含的 MAC SDU进行排序;
所述发送模块, 具体用于将所述排序模块排序后的所述 MAC SDU发送 至 RLC层。
24、 根据权利要求 19~23任一项所述的接收端设备, 其特征在于, 所述发送模块, 具体用于根据所述 MAC PDU的包头中携带的逻辑信道 标识,将所述 MAC PDU包含的 MAC SDU发送至所述 RLC层中与所述逻辑 信道标识对应的逻辑信道中。
25、 一种发送端设备, 其特征在于, 包括: 处理器和存储器, 所述存储 器存储执行指令, 当所述发送端设备运行时, 所述处理器与所述存储器之间 通信,所述处理器执行所述执行指令使得所述发送端设备执行如权利要求 1~6 任一项所述的方法。
26、 一种接收端设备, 其特征在于, 包括: 处理器和存储器, 所述存储 器存储执行指令, 当所述接收端设备运行时, 所述处理器与所述存储器之间 通信, 所述处理器执行所述执行指令使得所述接收端设备执行如权利要求 7~12任一项所述的方法。
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US20170034862A1 (en) 2017-02-02

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