WO2014180383A1 - 一种d2d数据发送的方法和用户设备 - Google Patents

一种d2d数据发送的方法和用户设备 Download PDF

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Publication number
WO2014180383A1
WO2014180383A1 PCT/CN2014/078138 CN2014078138W WO2014180383A1 WO 2014180383 A1 WO2014180383 A1 WO 2014180383A1 CN 2014078138 W CN2014078138 W CN 2014078138W WO 2014180383 A1 WO2014180383 A1 WO 2014180383A1
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Prior art keywords
channel
control channel
data
control
information
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PCT/CN2014/078138
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English (en)
French (fr)
Inventor
杨瑾
吴栓栓
袁明
李楠
黄双红
Original Assignee
中兴通讯股份有限公司
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Publication of WO2014180383A1 publication Critical patent/WO2014180383A1/zh

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Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W4/00Services specially adapted for wireless communication networks; Facilities therefor
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00Arrangements affording multiple use of the transmission path
    • H04L5/003Arrangements for allocating sub-channels of the transmission path
    • H04L5/0053Allocation of signaling, i.e. of overhead other than pilot signals
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00Arrangements affording multiple use of the transmission path
    • H04L5/0091Signaling for the administration of the divided path
    • H04L5/0092Indication of how the channel is divided
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W48/00Access restriction; Network selection; Access point selection
    • H04W48/08Access restriction or access information delivery, e.g. discovery data delivery
    • H04W48/12Access restriction or access information delivery, e.g. discovery data delivery using downlink control channel
    • 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
    • H04L5/00Arrangements affording multiple use of the transmission path
    • H04L5/003Arrangements for allocating sub-channels of the transmission path
    • H04L5/0044Arrangements for allocating sub-channels of the transmission path allocation of payload
    • H04L5/0046Determination of how many bits are transmitted on different sub-channels

Definitions

  • the present invention relates to the field of mobile communications, and in particular, to a method and user equipment for transmitting D2D data. Background technique
  • the service data of UE1 to UE2 is first transmitted to the base station 1 where UE1 is located through an air interface (referred to as an air interface), and the base station 1 passes through the core network.
  • the service data is transmitted to the base station 2 where the UE2 is located, and the base station 2 transmits the service data to the UE2 through the air interface; the service data transmission of the UE2 to the UE1 adopts a similar processing flow.
  • UE1 and UE2 are located in the same cell, as shown in Fig. 1, although base station 1 and base station 2 are the same site, one data transmission still consumes two radio spectrum resources.
  • D2D Device to Device
  • the so-called D2D communication means that the service data is not forwarded by the base station and directly transmitted by the source user equipment to the target user equipment through the air interface.
  • This communication mode has characteristics that are significantly different from the traditional cellular system communication mode.
  • D2D transmission not only saves wireless spectrum resources, but also reduces the data transmission pressure of the core network.
  • Cellular network-based D2D communication is a new technology that directly communicates between multiple D2D-enabled terminal devices under the control of the system. It can reduce system resource consumption, increase the spectrum efficiency of cellular communication systems, and reduce terminal transmission. Work Consumption, and to a large extent save network operating costs.
  • each UE can serve as a source transmitting end to transmit D2D communication data to other surrounding UEs, including unicast messages, multicast messages, broadcast messages, and the like.
  • the physical resources for carrying various messages are uniformly scheduled by the base station.
  • the UE needs to send data, the UE needs to apply for resources to the base station, and uses the configured resources to carry the message under the scheduling indication of the base station. emission.
  • the radio resources required for D2D communication by the D2D UE are system uplink resources, including the system uplink frequency band or the system uplink subframe.
  • the resources used by the D2D UE may be similar to the processing in the cellular network, and may still be controlled by the base station, or may not be The centralized scheduling management of the base station is required. Within a certain resource range, the D2D UE obtains resources through the competition, and performs D2D communication. Since all the radio resources in the traditional cellular communication network are uniformly scheduled and controlled by the base station, the UE does not have the function and authority to compete for the resources. Therefore, there is currently no method for the UE to obtain the corresponding resource competition, which is also an urgent problem to be solved. . Summary of the invention
  • the embodiments of the present invention provide a method for transmitting D2D data and a user equipment.
  • the embodiment of the invention provides a method for transmitting D2D data, the method comprising:
  • the UE sends the contention and/or control information on the D2D control channel, and carries the D2D communication service data on the data channel corresponding to the control channel, where the control channel and the data channel are in a corresponding relationship. And the resources included in the control channel and the data channel are fixed.
  • the resources included in the control channel and the data channel are system uplink resources or dedicated frequency band resources.
  • the sending the contention flag information and/or the control information on the D2D control channel includes:
  • Selecting an idle control channel by listening to all or part of the control channel, and The contention flag information and/or control information is transmitted on the selected control channel on the next resource period.
  • the selecting by listening to all or part of the control channel, selecting an idle control channel, includes:
  • the selection is made in an idle control channel based on the control channel grouping, the service data requirements to be transmitted, the attributes and/or priorities of the UE.
  • the contention flag information when the contention flag information is sent on the D2D control channel, the contention flag information is used to indicate that the control channel and its corresponding data channel are used, that is, on the next available resource period,
  • the control channel where the contention information is located and the corresponding data channel are non-idle resources.
  • the contention period information includes a resource period count value, where the resource period count value indicates the number of accumulated resource periods that the UE has used the control channel and the corresponding data channel; or, the resource period count The value indicates the number of remaining resource periods for which the UE is allowed to use the control channel and the corresponding data channel.
  • control information when the control information is sent on the D2D control channel, the control information is a control indication for performing D2D communication service data carried by the data channel corresponding to the control channel, and the control information includes at least one of the following information. :
  • Modulation coding mode used by the data channel MCS Modulation coding mode used by the data channel MCS
  • Attribute information of service data carried on the data channel
  • the target of the service data carried on the data channel receives the ID of the UE
  • a count of retransmissions of service data carried on the data channel is a count of retransmissions of service data carried on the data channel.
  • the resource period is a minimum interval in which the resources included in the control channel and/or the data channel are repeated in the time domain.
  • the method further includes: obtaining, according to the one-to-one correspondence between the control channel and the data channel, obtaining a resource of a data channel corresponding to the control channel by using a control channel, where the corresponding relationship includes the following At least one item: a channel resource correspondence relationship and a channel ID index relationship.
  • the resources included in the control channel and the data channel are fixed, including: the number and location of the physical resource blocks PRB included in each control channel are fixed and known, and are preset by the system;
  • the number and location of PRBs contained in each data channel are fixed and known, as determined by the corresponding control channel and the corresponding relationship.
  • control channel is a physical uplink control channel (PUCCH)
  • PUCCH physical uplink control channel
  • the UE processes and carries the contention flag information and/or control information according to a PUCCH format, and uses the contention flag information and/or control information to Any one of the PUCCH format l/la/lb/2/2a/2b/3 formats the processing bearer and maps it to the selected control channel for transmission.
  • the data channel is a physical uplink shared channel (PUSCH)
  • PUSCH physical uplink shared channel
  • the embodiment of the invention further provides a user equipment, including:
  • a first sending unit configured to send the contention flag information and/or the control information on the D2D control channel
  • a second sending unit configured to carry and transmit D2D communication service data on a data channel corresponding to the control channel
  • control channel and the data channel have a one-to-one correspondence, and the resources included in the control channel and the data channel are fixed.
  • the first sending unit is configured to select one idle control channel by listening to all or part of the control channel, and send the contention information on the selected control channel in the next resource period. And / or control information.
  • the second sending unit is configured to: according to the control channel and the data signal a one-to-one correspondence between the channels, and obtaining, by the control channel, resources of the data channel corresponding to the control channel, where the correspondence includes at least one of the following: channel resource correspondence, channel
  • the embodiment of the present invention further provides a computer readable storage medium, the storage medium comprising a set of computer executable instructions, the instructions being used to perform the method for transmitting D2D data according to the embodiment of the present invention.
  • the method for transmitting D2D data and the user equipment provided by the embodiment of the present invention enable the UE of the D2D communication to obtain resources through the contention in the available resources, and the resource is used for transmitting the D2D communication data of the UE, so that the UE can be effective.
  • FIG. 1 is a schematic diagram of a conventional cellular network data communication method
  • FIG. 2 is a schematic diagram of a D2D communication method
  • FIG. 3 is a flowchart of a method for transmitting D2D data according to an embodiment of the present invention
  • FIG. 4 is a schematic diagram of a correspondence relationship between a Control Channel and a Data Channel according to an embodiment of the present invention
  • FIG. 5 is a schematic diagram of another correspondence between a Control Channel and a Data Channel according to an embodiment of the present invention.
  • FIG. 6 is a schematic diagram of another correspondence relationship between a Control Channel and a Data Channel according to an embodiment of the present invention.
  • FIG. 7 is a schematic diagram of a corresponding relationship between a Control Channel and a Data Channel according to an embodiment of the present invention.
  • FIG. 8 is a flowchart of a UE competing for resources and transmitting a signal according to an embodiment of the present invention
  • FIG. 9 is a schematic diagram of resource period setting according to an embodiment of the present invention.
  • FIG. 10 is a schematic diagram of another resource cycle setting according to an embodiment of the present invention
  • FIG. 11 is a schematic diagram of a PUCCH channel structure as a Control Channel according to an embodiment of the present invention
  • FIG. 12 is a schematic diagram of system setting according to an embodiment of the present invention.
  • FIG. 13 is a schematic structural diagram of a user equipment according to an embodiment of the present invention. detailed description
  • Step 301 The UE sends the contention flag information and/or the control information on the D2D control channel.
  • Step 302 The UE carries the D2D communication service data on the data channel corresponding to the control channel.
  • control channel and the data channel are in a one-to-one correspondence, and the resources included in the control channel and the data channel are fixed; the resources included in the control channel and the data channel may be system uplink resources or dedicated frequency band resources.
  • the transmitting the contention flag information and/or the control information on the D2D control channel includes: selecting an idle control channel by listening to all or part of the control channel, and selecting the control on the next resource cycle.
  • the contention flag information and/or control information is transmitted on the channel.
  • the selecting, by listening to all or part of the control channel, an idle control channel includes:
  • the selection is made in an idle control channel based on the control channel grouping, the service data requirements to be transmitted, the attributes and/or priorities of the UE.
  • the contention flag information When the contention flag information is sent on the D2D control channel, the contention flag information is used to indicate that the control channel and its corresponding data channel are used, that is, the contention information is located on the next available resource period.
  • Control channel and corresponding data channel are non-idle resources;
  • the contention period information may include a resource period count value, where the resource period count value indicates a cumulative resource period of the control channel and the corresponding data channel used by the UE; or the resource period count value indicates The number of remaining resource periods for which the UE is allowed to use the control channel and the corresponding data channel.
  • the control information is a control indication performed on the D2D communication service data carried by the data channel corresponding to the control channel, where the control information includes at least one of the following information:
  • Modulation coding mode used by the data channel MCS Modulation coding mode used by the data channel MCS
  • the ID of the UE to which the service data is to be sent
  • Attribute information of service data carried on the data channel
  • the target of the service data carried on the data channel receives the ID of the UE
  • a count of retransmissions of service data carried on the data channel is a count of retransmissions of service data carried on the data channel.
  • the control channel may be a PUCCH
  • the UE processes and processes the contention flag information and/or control information according to a PUCCH format, and uses the contention flag information and/or control information in PUCCH format l/la/ Any of the formats lb/2/2a/2b/3 are processed and mapped and mapped to the selected control channel for transmission:
  • the data channel may be a PUSCH, and the UE processes the D2D communication service data according to the control information in the control channel, and maps the data on the corresponding data channel for transmission.
  • the D2D UE when there is no base station or other centralized control node for unified resource scheduling in the D2D communication, the D2D UE needs to obtain the resource in a competitive manner, and the competition is obtained when the competition is successful.
  • the resource carries the data to be sent, and when the competition fails, the competition process is restarted.
  • an embodiment of the present invention provides a related control for a D2D UE to reach a contention resource through a control channel and indicate that a service data is transmitted on a data channel resource that is obtained through competition.
  • Information method c Control Channel
  • the physical resources included in the Data Control are system uplink resources, including uplink frequency bands in a Frequency Division Duplexing (FDD) system, or uplink sub-messages in a Time Division Duplexing (TDD) system;
  • the physical resources included in the Control Channel and the Data Control are dedicated frequency bands for short-range communication or D2D communication.
  • each Control Channel and Data Channel are fixed, that is, the physical resource blocks (PRBs) included in each Control Channel are fixedly known.
  • PRBs physical resource blocks
  • all D2D UEs can accurately monitor all Control Channels, and can also monitor some of the Control Channels according to the configuration or the learned information, and listen to the idle Control Channels that are not carrying signals.
  • Each Data Channel corresponds to a unique Control Channel.
  • the UE competes for a certain Control Channel, the corresponding Data Channel resources are obtained correspondingly.
  • the PRBs included in each Data Channel are also fixedly known and can be obtained through the corresponding Control Channel index.
  • the correspondence between the Control Channel and the Data Channel may be determined by a channel resource correspondence relationship, where the channel resource relationship refers to a fixed relationship of physical resource locations included in each channel, and each Control Channel includes a fixed PRB, according to The location of the Control Channel determines the PRB location of the corresponding Data Channel according to the predefined-correspondence relationship.
  • the corresponding Data Channel resource can be obtained according to each Control Channel.
  • the Control Channel and the Data Channel may be determined according to the channel number or the channel ID index - the corresponding relationship, as shown in FIG. 5, the Control Channel #n corresponds to the Data Channel #n, and the UE uses the Control Channel #n, correspondingly The Data Channel #n is the data channel resource for this UE.
  • the logical channel number can be periodically changed according to a certain rule to form a flexible resource mapping relationship.
  • a certain rule As shown in FIG. 6, the resource location of the Data Channel #n corresponding to the Control Channel #n is displayed in each resource cycle. Change with certain rules, Control Channel and Data Channel implements a unique fixed-correspondence relationship with logical channel numbers. Alternatively, the Control Channel and the Data Channel may be determined according to channel resources - the corresponding relationship.
  • the Control Channel resource includes a code or sequence resource used by the channel, for example, a pilot sequence, a scrambling code, a channel resource orthogonal code, etc., so that multiple Control Channels are multiplexed the same.
  • the physical resource PRB further identifies a specific Control Channel by code or sequence resource, and further indexes the unique Data Channel, as shown in FIG. 7, Control Channel #1 (abbreviated as CCH#1 in the figure) and CCH#2.
  • CCH#3 includes the same physical resource.
  • CCH#K CCH #2 and CCH #3 are respectively multiplexed on the same physical resource by orthogonal sequence resources, so that the receiving UE can be distinguished by different sequence resources. Corresponding CCH #1, CCH #2, CCH #3, and then index to obtain the corresponding Data Channel resources.
  • the process in which the D2D UE competes for resources and performs data transmission is as shown in FIG. 8.
  • the D2D UE with D2D service data to be sent listens to all or part of the Control Channel (steps 801-802), and selects one in the idle Control Channel. While obtaining the Control Channel resource, the Data Channel resource corresponding to the channel is also obtained (step 803).
  • the UE carries the contention information and/or control information on the Control Channel and transmits it on the next resource cycle, and carries the service data on the Data Channel corresponding to the Control Channel and sends it (steps 804-805).
  • the UE may continue to use the current Control Channel and the Data Channel, and continue to carry the competition flag information and/or control information on the Control Channel and send it on the next resource cycle.
  • the service data is carried on the channel and sent; when the data transmission of the UE is completed, the UE no longer uses the Control Channel and the Data Channel, that is, the resource is released, so that the Control Channel is restored to an idle resource, and the UE can be used again for competition ( Step 806).
  • the resource period described herein refers to the minimum interval in which the resources included in the Control Channel and/or the Data Channel are repeated in the time domain, in units of subframes, and the resource period is k subframes, that is, k milliseconds (ms), k is A positive integer. Due to different functions and requirements in D2D communication, The resources are divided according to the time division multiplexing manner, and the subframe in which the Control Channel and the Data Channel are located includes all or part of the subframes in the available frequency band of the D2D. Further, according to different system configurations, the resource period is at least 1 subframe, and the value is any subframe number greater than or equal to 1. Taking Figure 9 as an example, the resource channel of the Control Channel and the Data Channel is the same, which is 8ms; or, in Figure 10, the resource period is 10ms.
  • the UE may select one of all idle Control Channels according to a certain principle and use the Control Channel to transmit the competition flag on the next resource period.
  • the method for selecting an idle control channel includes: random selection, that is, the UE randomly selects any one of the Control Channels in all idle control channels;
  • the UE selects according to the grouping of the Control Channel, and the Control Channel itself is divided into different attributes or priority groups, and the amount of resources included in the Control Channel in each group or the amount of resources included in the corresponding Data Channel is different, or The service data attributes or priorities of each group of Control Channels and their corresponding Data Channels can be different.
  • the UE can select a Control Channel to use in the applicable group according to its own requirements.
  • the UE selects an applicable Control Channel according to the D2D service data requirement to be sent, where the data requirement includes a service type (such as VoIP, video, file, etc.), a service priority requirement (such as a priority level corresponding to the data), and the like;
  • a service type such as VoIP, video, file, etc.
  • a service priority requirement such as a priority level corresponding to the data
  • the UE selects a corresponding Control Channel according to its own attribute and/or priority selection. For example, if the UE is a normal D2D UE or a high-level D2D UE, a different Control Channel may be selected accordingly.
  • the UE sends the contention flag information and/or the control information on the selected Control Channel, where the contention flag information is used to indicate that the Control Channel has been used, and the other UEs that monitor the Control Channel receive the signal on the Control Channel. And after detecting the contention information, it is known that the Control Channel resource has been used, not an idle channel resource. You cannot compete to use this channel resource and its corresponding Data Channel resource.
  • the competition flag information may include lbit or n bit (n is a positive integer greater than 1) information.
  • the competition flag information is a competition flag, such as: When the l bit information value is 1, it indicates that the Control Channel resource is used. When the information value is 0, it indicates that the Control Channel resource is idle.
  • the contention information is embodied as whether the signal is transmitted on the corresponding Control Channel.
  • the channel resource is used. Signal transmission is performed, that is, the contention flag is 1.
  • PUCCH format 1 can be used as the Control Channel transmission mode at this time.
  • the n bit information may indicate the usage count value of the control channel resource by the UE, which is represented by the counting of the resource period, and the counting value may include the following two usage modes:
  • the n bit information indicates the accumulated value of the resource period that the UE has used for the Control Channel, that is, the number of times the UE has used the Control Channel and performs signal transmission on the corresponding Data Channel;
  • the n bit information indicates that the UE can or needs to continue to use the remaining resource cycle counts of the Control Channel and the Data Channel, that is, the number of times the UE will continue to use the channel resource and perform signal transmission on its Data Channel.
  • the UE when the UE competes for obtaining and using a certain Control Channel and its corresponding Data Channel resource, the UE transmits signals on the Control Channel and the Data Channel in each resource cycle, and then each signal is transmitted along with the UE.
  • the resource cycle count represented by the n bit of the contention flag information is incremented by one; in the second mode, the UE performs signal transmission on the Control Channel and the Data Channel on each resource cycle, and the UE transmits signals according to the UE.
  • the resource cycle count represented by the n bit of the contention flag information is decremented by one.
  • the UE sends the contention information and/or the control information on the selected Control Channel, where the control information is used to indicate related control information of the bearer service data information on the Data Channel corresponding to the Control Channel, and may include the following One or more of the control information:
  • the Data Channel bears the MCS (Modulation and Coding Scheme) indication, that is, the MCS level used by the UE to carry the data processing on the Data Channel, and the value is 0-15;
  • MCS Modulation and Coding Scheme
  • Redundant version (RV) information encoding the data, indicating a coded redundant bit related indication carried in the transmitted signal, having a value of 0-3;
  • the ID information of the UE that is, the ID information of the UE that uses the channel resource to perform signal transmission, for example, UE-RNTI and the like, which can uniquely identify the identity of the UE;
  • Attribute information of the service data sent by the UE such as service type (broadcast, multicast, unicast, etc.), service priority, group to which the service belongs, and other related indication information about the service data;
  • the target of the service data carried by the UE on the Data Channel receives the UE ID, that is, the ID information of the one or more UEs that the service data allows to be received, and the specific ID information may be a unique identifier of the UE, such as the R TK D2D ID of the UE.
  • the retransmission count of the service data when the UE retransmits the transmitted data as needed, indicating that the signal transmitted by the current Data Channel is the initial transmission or retransmission of the data, and is represented by a count, for example, a retransmission count value. 0, it is expressed as the initial transmission, and correspondingly, when the count value is k, it is expressed as the kth retransmission.
  • the UE controls the service data bearer in the corresponding Data Channel by carrying control information in the Control Channel, which is beneficial for other UEs to receive data in the Data Channel more efficiently.
  • the system pre-defines the number of Control Channel resources available in D2D communication, as well as the specific resources contained in each Control Channel.
  • Each Control Channel contains a certain number of PRBs.
  • Multiple Control Channels can further perform resource multiplexing by means of code division (different sequences).
  • the Control Channel may use an LTE PUCCH channel structure, as shown in FIG. 11, corresponding to a pair of PRBs in each subframe, and each of the slots #() and slot#1 respectively include a PRB for carrying the competition. Sign information and / or control information.
  • the UE may use the PUCCH format l/la/lb/2/2a/2b/3 format to compete for the flag information and/or control. The information is processed and carried on the corresponding Control Channel channel resource and transmitted.
  • the system pre-defines the number of Data Channel resources available in D2D communication, as well as the specific resources contained in each Data Channel.
  • Each Data Channel includes a certain number of PRBs.
  • the Data Channel can use the LTE PUSCH channel structure to process and carry D2D service data in a PUSCH channel on a predefined one or more PRBs.
  • the D2D service data includes broadcast message data, multicast message data, and unicast message data.
  • the PUCCH channel is used as the Control Channel
  • the PUSCH channel is used as the Data Channel.
  • a total of 20 Control Channels and corresponding 20 Data Channels are set.
  • 5 subframes are set as available data for D2D communication.
  • Frame, and the resource period is 2ms.
  • the UE listens to all or part of the Control Channel on the sublrame #0 of Frame #n, learns the currently idle Control Channel, and randomly selects Channel #5 for resource competition, on the next resource cycle, that is, On subframe #2, a 1-bit contention flag information is transmitted on Control Channel #5, indicating that the channel resource is used for competition, and the service data is carried on the corresponding Data Channel #5 for transmission.
  • On subframe #2 no other UE chooses to use this resource, and the UE competes successfully.
  • the service data of the UE is not sent on the Data Channel #5 of the subframe #2, it will continue to use the Control Channel #5 to transmit the contention flag information on the next resource cycle, that is, the subframe #4, and mark that the channel is used. , And continue to bear the remaining service data on Data Channel #5, and so on, until the UE sends all the service data.
  • Embodiment 2
  • the PUCCH channel is used as the Control Channel
  • the PUSCH channel is used as the Data Channel.
  • a total of 20 Control Channels and corresponding 20 Data Channels are set.
  • 5 subframes are set as data sub-frames for D2D communication, and the resource period is 2 ms.
  • UE A listens to all or part of the Control Channel on subframe #0 of Frame #n, learns the currently idle Control Channel and randomly selects Channel #5 for resource competition.
  • the system is predefined, with the PUCCH channel as the Control Channel, the UE needs to carry the l bit competition flag information in the Control Channel, and the 5 bit MCS control information, and the UE uses PUCCH format 3 to process the above 6 bit information, and the mapping is in the office. Send on the selected Control Channel.
  • Embodiment 4
  • the system is predefined, with the PUCCH channel as the Control Channel and the UE in the Control The Channel indicates whether the competition flag information is transmitted or not, and does not include control information. Then, the UE uses the PUCCH format 1 to process the contention information of the contention flag in the manner of the PUCCH format 1 and maps the information on the selected Control Channel to transmit the data corresponding to the D2D data transmission.
  • a UE as shown in FIG. 13, includes:
  • the first sending unit 10 is configured to send the contention flag information and/or the control information on the D2D control channel;
  • the second sending unit 20 is configured to carry and transmit D2D communication service data on a data channel corresponding to the control channel;
  • control channel and the data channel have a one-to-one correspondence, and the resources included in the control channel and the data channel are fixed.
  • the resources included in the control channel and the data channel are system uplink resources or dedicated frequency band resources.
  • the first sending unit 10 is configured to select an idle control channel by listening to all or part of the control channel, and send the contention information and the selected control channel on the selected control channel in a next resource cycle. / or control information.
  • the selecting, by listening to all or part of the control channel, an idle control channel includes:
  • the selection is made in an idle control channel based on the control channel grouping, the service data requirements to be transmitted, the attributes and/or priorities of the UE.
  • the contention flag information when the contention flag information is sent on the D2D control channel, the contention flag information is used to indicate that the control channel and its corresponding data channel are used, that is, on the next available resource period, the contention flag The control channel where the information is located and the corresponding data channel are non-idle resources.
  • the contention period information includes a resource period count value, where the resource period count value indicates the number of accumulated resource periods in which the UE has used the control channel and the corresponding data channel; or the resource period count value indicates the The UE is allowed to use the number of remaining resource periods of the control channel and the corresponding data channel.
  • the control information is a control indication performed on the D2D communication service data carried by the data channel corresponding to the control channel, where the control information includes at least one of the following information:
  • the MCS used by the data channel is the MCS used by the data channel
  • Attribute information of service data carried on the data channel
  • the target of the service data carried on the data channel receives the ID of the UE
  • a count of retransmissions of service data carried on the data channel is a count of retransmissions of service data carried on the data channel.
  • the resource period is a minimum interval in which the resources included in the control channel and/or the data channel are repeated in the time domain.
  • the second sending unit 20 is configured to obtain, according to a one-to-one correspondence between the control channel and the data channel, and obtain a resource of a data channel corresponding to the control channel by using a control channel, where the corresponding relationship includes At least one of the following: channel resource correspondence, channel ID index relationship.
  • the resources included in the control channel and the data channel are fixed, including:
  • the number and location of PRBs contained in each control channel are fixed and known, and are preset by the system;
  • the number and location of PRBs contained in each data channel are fixed and known, as determined by the corresponding control channel and the corresponding relationship.
  • the control channel may be a PUCCH
  • the first sending unit 10 is configured to process the contention flag information and/or control information according to a PUCCH format, and use the contention flag
  • the information and/or control information is processed and carried in any of PUCCH format l/la/lb/2/2a/2b/3 and mapped to the selected control channel for transmission.
  • the data channel may be a PUSCH
  • the second sending unit 20 is configured to process the D2D communication service data according to the control information in the control channel, and map the data to be transmitted on the corresponding data channel.
  • first sending unit 10 and the second sending unit 20 may be digital signals of a CPU (Central Processing Unit), a microprocessor (MPU, Micro Processing Unit) of the UE according to the embodiment of the present invention.
  • a DSP Digital Signal Processor
  • FPGA Field Programmable Gate Array
  • an embodiment of the present invention further provides a computer readable storage medium, where the storage medium includes a set of computer executable instructions, and the instructions are used to perform the method for transmitting D2D data according to the embodiment of the present invention.
  • embodiments of the present invention can be provided as a method, system, or computer program product. Accordingly, the present invention can take the form of a hardware embodiment, a software embodiment, or a combination of software and hardware aspects. 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 and optical storage, etc.) including computer usable program code.
  • 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 a block or blocks of a flow or a flow and/or a block diagram of a flowchart.

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Abstract

本发明公开了一种D2D数据发送的方法和用户设备,方法包括:UE在D2D控制信道上发送竞争标志信息和/或控制信息,并在所述控制信道对应的数据信道上承载发送D2D通信业务数据,其中,所述控制信道与数据信道为一一对应关系,且所述控制信道和数据信道所包含的资源固定。用户设备包括:第一发送单元,配置为在D2D控制信道上发送竞争标志信息和/或控制信息;第二发送单元,配置为在所述控制信道对应的数据信道上承载发送D2D通信业务数据;其中,所述控制信道与数据信道为一一对应关系,且所述控制信道和数据信道所包含的资源固定。

Description

一种 D2D数据发送的方法和用户设备 技术领域
本发明涉及移动通信领域, 尤其涉及一种 D2D数据发送的方法和用户 设备。 背景技术
在蜂窝系统中, 当两个用户设备(UE )之间有业务需要传输时, UE1 到 UE2的业务数据, 会首先通过空中接口 (简称空口 )传输给 UE1所在的 基站 1 , 基站 1通过核心网将该业务数据传输给 UE2所在的基站 2, 基站 2 再将所述业务数据通过空口传输给 UE2; UE2到 UE1的业务数据传输采用 类似的处理流程。 当 UE1和 UE2位于同一个蜂窝小区时, 如图 1所示, 虽 然基站 1和基站 2是同一个站点, 然而一次数据传输仍然会消耗两份无线 频谱资源。
由此可见, 如果 UE1和 UE2位于同一小区并且相距较近, 那么上述的 蜂窝通信方法显然不是最优的通信方式。 而实际上, 随着移动通信业务的 多样化, 例如, 社交网络、 电子支付等在无线通信系统中的应用越来越广 泛,使得近距离用户之间的业务传输需求日益增长。因此,设备到设备( D2D, Device to Device ) 的通信模式日益受到广泛关注。 所谓 D2D通信, 如图 2 所示, 是指业务数据不经过基站进行转发, 直接由源用户设备通过空口传 输给目标用户设备, 这种通信模式具有明显区别于传统蜂窝系统通信模式 的特征。对于近距离通信的用户来说, D2D传输不但节省了无线频谱资源 , 而且降低了核心网的数据传输压力。 基于蜂窝网的 D2D通信是一种在系统 的控制下,在多个支持 D2D功能的终端设备之间直接进行通信的新型技术, 它能够减少系统资源占用, 增加蜂窝通信系统频谱效率, 降低终端发射功 耗, 并在很大程度上节省网络运营成本。
在引入 D2D功能的无线通信网络中,每个 UE都可以作为信源发送端, 向周围的其他 UE发送 D2D通信数据, 包括单播消息、 组播消息、 广播消 息等。 在传统的蜂窝通信网络中, 用于承载各种消息的物理资源由基站统 一调度配置, UE需要发送数据时需向基站申请资源, 并在基站的调度指示 下使用所配置的资源进行消息的承载发射。 而 D2D UE进行 D2D通信所需 要的无线资源为系统上行资源, 包括系统上行频段或系统上行子帧, D2D UE所使用的资源可以类似于蜂窝网中的处理, 依旧由基站控制调度, 也可 以不需要基站的集中调度管理, 在一定的资源范围内, 由 D2D UE通过竟 争的方式获得资源, 进行 D2D通信。 由于在传统蜂窝通信网络中所有无线 资源由基站统一调度控制, UE不具备竟争使用资源的功能和权限, 因此目 前没有为 UE提供相应的资源竟争获得的方法,这也是目前亟待解决的问题。 发明内容
为解决现有存在的技术问题, 本发明实施例提供一种 D2D数据发送的 方法和用户设备。
本发明实施例提供了一种 D2D数据发送的方法, 该方法包括:
UE在 D2D控制信道上发送竟争标志信息和 /或控制信息, 并在所述控 制信道对应的数据信道上承载发送 D2D通信业务数据, 其中, 所述控制信 道与数据信道为——对应关系 , 且所述控制信道和数据信道所包含的资源 固定。
上述方案中 , 所述控制信道和数据信道所包含的资源为系统上行资源 或专用频段资源。
上述方案中,所述在 D2D控制信道上发送竟争标志信息和 /或控制信息, 包括:
通过监听全部或部分控制信道, 在其中选择一个空闲的控制信道, 并 在下一个资源周期上在所选的控制信道上发送所述竟争标志信息和 /或控制 信息。
上述方案中, 所述通过监听全部或部分控制信道, 在其中选择一个空 闲的控制信道, 包括:
在空闲的控制信道中进行随机选择; 或者
根据控制信道分组、 待发送的业务数据需求、 所述 UE的属性和 /或优 先级, 在空闲的控制信道中进行选择。
上述方案中, 在 D2D控制信道上发送竟争标志信息时, 所述竟争标志 信息用于表示所述控制信道及其对应的数据信道被使用 , 即在下一个可用 的资源周期上, 所述竟争标志信息所在的控制信道及对应的数据信道为非 空闲资源。
上述方案中, 所述竟争标志信息中包括资源周期计数值, 所述资源周 期计数值表示所述 UE 已经使用所述控制信道及相应数据信道的累计资源 周期数; 或者, 所述资源周期计数值表示所述 UE被允许使用所述控制信道 及相应数据信道的剩余资源周期数。
上述方案中, 在 D2D控制信道上发送控制信息时, 所述控制信息是对 所述控制信道对应的数据信道所承载 D2D通信业务数据进行的控制指示, 所述控制信息包括以下信息的至少之一:
所述数据信道所使用的调制编码方式 MCS;
待发送业务数据的所述 UE的标识 ID;
所述数据信道上承载的业务数据的属性信息;
所述数据信道上承载的业务数据的目标接收 UE的 ID;
所述数据信道上承载的业务数据的编码冗余版本;
所述数据信道上承载的业务数据重传的计数。
上述方案中, 所述资源周期为所述控制信道和 /或数据信道所包含的资 源在时域上重复的最小间隔。 上述方案中, 该方法还包括: 才艮据所述控制信道与数据信道的一一对 应关系, 并通过控制信道获得与所述控制信道对应的数据信道的资源 , 所 述——对应关系包括以下至少一项:信道资源对应关系、信道 ID索引关系。
上述方案中, 所述控制信道和数据信道所包含的资源固定, 包括: 每个控制信道所包含的物理资源块 PRB的数量和位置是固定和已知的, 且由系统预设;
每个数据信道所包含的 PRB的数量和位置是固定和已知的, 由对应的 控制信道及所述——对应关系确定。
上述方案中, 所述控制信道为物理上行控制信道(PUCCH ), 所述 UE 按照 PUCCH格式处理承载所述竟争标志信息和 /或控制信息, 将所述竟争 标志信息和 /或控制信息以 PUCCH format l/la/lb/2/2a/2b/3中的任意一种格 式进行处理承载, 并映射到所选的控制信道上进行发送。
上述方案中, 所述数据信道为物理上行共享信道(PUSCH ), 所述 UE 按照所述控制信道中的控制信息对 D2D通信业务数据进行处理, 并映射在 相应的数据信道上进行发送。
本发明实施例还提供了一种用户设备, 包括:
第一发送单元,配置为在 D2D控制信道上发送竟争标志信息和 /或控制 信息;
第二发送单元, 配置为在所述控制信道对应的数据信道上承载发送 D2D通信业务数据;
其中, 所述控制信道与数据信道为一一对应关系, 且所述控制信道和 数据信道所包含的资源固定。
上述方案中, 所述第一发送单元配置为, 通过监听全部或部分控制信 道, 在其中选择一个空闲的控制信道, 并在下一个资源周期上在所选的控 制信道上发送所述竟争标志信息和 /或控制信息。
上述方案中, 所述第二发送单元配置为, 根据所述控制信道与数据信 道的一一对应关系 , 并通过控制信道获得与所述控制信道对应的数据信道 的资源, 所述——对应关系包括以下至少一项: 信道资源对应关系、 信道
ID索引关系。
本发明实施例还提供了一种计算机可读存储介质 , 所述存储介质包括 一组计算机可执行指令, 所述指令用于执行本发明实施例所述的 D2D数据 发送的方法。
本发明实施例所提供的一种 D2D 数据发送的方法和用户设备, 使得 D2D通信的 UE在可用的资源内通过竟争获得资源 ,该资源用于 UE的 D2D 通信数据发送,使 UE能够有效的进行资源的竟争并获得可用资源, 降低资 源竟争的冲突率, 达到高效利用资源、 提高网络灵活性的作用。 附图说明
图 1为传统蜂窝网络数据通信方式的示意图;
图 2为 D2D通信方式的示意图;
图 3为本发明实施例的一种 D2D数据发送的方法流程图;
图 4为本发明实施例中 Control Channel与 Data Channel的一种对应关 系示意图;
图 5为本发明实施例中 Control Channel与 Data Channel的另一种对应 关系示意图;
图 6为本发明实施例中 Control Channel与 Data Channel的再一种对应 关系示意图;
图 7为本发明实施例中 Control Channel与 Data Channel的还一种对应 关系示意图;
图 8为本发明实施例的 UE竟争资源并发射信号的流程图;
图 9为本发明实施例的一种资源周期设置的示意图;
图 10为本发明实施例的另一种资源周期设置的示意图; 图 1 1为本发明实施例的以 PUCCH信道结构作为 Control Channel的示 意图;
图 12为本发明一实施例的系统设置示意图;
图 13为本发明实施例的一种用户设备的结构示意图。 具体实施方式
下面结合附图和具体实施例对本发明的技术方案进一步详细阐述。
本发明实施例提供的一种 D2D数据发送的方法, 如图 3所示, 主要包 括:
步骤 301 , UE在 D2D控制信道上发送竟争标志信息和 /或控制信息; 步骤 302, 所述 UE在所述控制信道对应的数据信道上承栽发送 D2D 通信业务数据。
其中, 所述控制信道与数据信道为一一对应关系, 且所述控制信道和 数据信道所包含的资源固定; 所述控制信道和数据信道所包含的资源可以 为系统上行资源或专用频段资源。
其中,所述在 D2D控制信道上发送竟争标志信息和 /或控制信息,包括: 通过监听全部或部分控制信道, 在其中选择一个空闲的控制信道, 并在下 一个资源周期上在所选的控制信道上发送所述竟争标志信息和 /或控制信息。
其中, 所述通过监听全部或部分控制信道, 在其中选择一个空闲的控 制信道, 包括:
在空闲的控制信道中进行随机选择; 或者
根据控制信道分组、 待发送的业务数据需求、 所述 UE的属性和 /或优 先级, 在空闲的控制信道中进行选择。
在 D2D控制信道上发送竟争标志信息时, 所述竟争标志信息用于表示 所述控制信道及其对应的数据信道被使用 , 即在下一个可用的资源周期上, 所述竟争标志信息所在的控制信道及对应的数据信道为非空闲资源; 所述竟争标志信息中可以包括资源周期计数值, 所述资源周期计数值 表示所述 UE已经使用所述控制信道及相应数据信道的累计资源周期数;或 者,所述资源周期计数值表示所述 UE被允许使用所述控制信道及相应数据 信道的剩余资源周期数。
其中, 在 D2D控制信道上发送控制信息时, 所述控制信息是对所述控 制信道对应的数据信道所承栽 D2D通信业务数据进行的控制指示, 所述控 制信息包括以下信息的至少之一:
所述数据信道所使用的调制编码方式 MCS;
待发送业务数据的 UE的标识 ID;
所述数据信道上承载的业务数据的属性信息;
所述数据信道上承载的业务数据的目标接收 UE的 ID;
所述数据信道上承载的业务数据的编码冗余版本;
所述数据信道上承载的业务数据重传的计数。
其中 , 所述控制信道可以为 PUCCH, 所述 UE按照 PUCCH格式处理 承栽所述竟争标志信息和 /或控制信息, 将所述竟争标志信息和 /或控制信息 以 PUCCH format l/la/lb/2/2a/2b/3中的任意一种格式进行处理承载, 并映 射到所选的控制信道上进行发送:
所述数据信道可以为 PUSCH, 所述 UE按照所述控制信道中的控制信 息对 D2D通信业务数据进行处理, 并映射在相应的数据信道上进行发送。
下面详细说明, 本发明实施例中, 当 D2D通信中没有基站或其他集中 控制节点进行统一的资源调度时, D2D UE需要以竟争的方式进行资源获得, 当竟争成功时使用竟争获得的资源进行数据的承载发送, 当竟争失败时, 则重新开始竟争过程。
为了达到有效的资源竟争, 本发明实施例提出了一种 D2D UE通过控 制信道( Control Channel )达到竟争资源并指示在竟争获得的数据信道( Data Channel )资源上发射业务数据的相关控制信息的方法 c.这里 Control Channel 和 Data Control所包含的物理资源为系统上行资源 , 包括频分双工 ( FDD, Frequency Division Duplexing ) 系统中的上行频段, 或者时分双工 ( TDD, Time Division Duplexing )系统中的上行子中贞;或者, Control Channel和 Data Control所包含的物理资源为近距离通信或 D2D通信的专用频段。
为了实现有序的竟争及信号发射,每个 Control Channel和 Data Channel 所包含的资源是固定的, 即每个 Control Channel 所包含的物理资源块 ( PRB , Physical Resource Block )是固定已知的 , 这样所有 D2D UE能够 准确监听所有的 Control Channel ,也可以根据配置或已获知的信息监听其中 部分 Control Channel , 并通过监听获知未承载信号的空闲 Control Channel. 每个 Data Channel对应于唯一的 Control Channel , 当 UE 竟争使用某个 Control Channel时, 即相应获得此——对应的 Data Channel的资源, 每个 Data Channel 所包含的 PRB 也是固定已知的, 可以通过相应的 Control Channel索引获得。
例如, Control Channel与 Data Channel的——对应关系可以通过信道资 源对应关系确定, 这里信道资源关系是指具体每个信道所包含的物理资源 位置的固定关系, 每个 Control Channel 包含固定的 PRB , 根据 Control Channel的位置, 按照预定义的——对应关系 , 确定相应的 Data Channel所 包含的 PRB位置, 如图 4中所示, 根据每个 Control Channel可以获得对应 的 Data Channel资源。
或者, Control Channel与 Data Channel可以按照信道号或信道 ID索引 确定——对应的关系,如图 5所示 , Control Channel #n即对应着 Data Channel #n, 则 UE使用 Control Channel #n时, 相应的 Data Channel #n即为此 UE 的数据信道资源。
优选的, 这种逻辑信道编号可以以一定的规则周期性变化, 形成灵活 的资源映射关系, 如图 6所示, 在每个资源周期上, Control Channel #n对 应的 Data Channel #n的资源位置以一定的规则变化, Control Channel与 Data Channel 以逻辑信道编号实现唯一的固定——对应关系。 或者, Control Channel与 Data Channel可以按照信道资源确定——对应的关系。
或者, Control Channel资源除了包括信道所在的物理资源 PRB以外, 还包括信道对应使用的码或序列资源, 例如, 导频序列、 扰码、 信道资源 正交码等, 使多个 Control Channel复用相同的物理资源 PRB, 进一步通过 码或序列资源标识具体的 Control Channel , 并进一步索引唯一的 Data Channel ,如图 7所示, Control Channel # 1 (图中简记为 CCH# 1 )与 CCH#2、 CCH#3包含相同的物理资源, 进一步的, CCH#K CCH #2、 CCH #3分别 由正交的序列资源复用在相同的物理资源上,从而能够使接收 UE通过不同 的序列资源区分出相应的 CCH#1、 CCH#2、 CCH#3 , 进而索引获得相应的 Data Channel资源。
D2D UE竟争资源并进行数据发送的流程如图 8所示, 有 D2D业务数 据待发送的 D2D UE监听全部或部分 Control Channel (步骤 801 -802 ), 在 空闲的 Control Channel中选择一个,则在获得 Control Channel资源的同时, 也获得了与此信道相对应的 Data Channel资源 (步驟 803 )。 UE在下一个资 源周期上在 Control Channel上承载竟争标志信息和 /或控制信息并发送, 在 此 Control Channel 对应的 Data Channel 上承栽业务数据并发送 (步骤 804-805 )。 当 UE的 D2D业务数据未发送完成时, UE可以持续使用当前的 Control Channel 和 Data Channel , 在下一个资源周期上, 继续在 Control Channel上承栽竟争标志信息和 /或控制信息并发送,在 Data Channel上承载 业务数据并发送; 当 UE 的数据发送完成时, 则 UE 不再使用此 Control Channel和 Data Channel , 即释放此资源, 从而此 Control Channel恢复为空 闲资源, 可供 UE再次竟争使用 (步驟 806 )。
这里所述的资源周期是指 Control Channel和 /或 Data Channel所包含的 资源在时域上重复的最小间隔, 以子帧为单位, 资源周期为 k 子帧, 即 k 毫秒(ms ), k为正整数。 由于 D2D通信中, 根据不同的功能及需求, 可以 按照时分复用的方式划分资源 , 则 Control Channel和 Data Channel所在的 子帧包括 D2D可用频段内的全部或部分子帧。 进一步的, 根据不同的系统 配置, 资源周期最小为 1个子帧, 取值为大于等于 1的任意子帧数。 以图 9 为例, Control Channel与 Data Channel的资源周期相同, 为 8ms; 或者以图 10为例, 资源周期为 10ms。
当 UE通过监听全部或部分 Control Channel,获知当前资源周期内空闲 的 Control Channel 信息时, UE 可依照一定的原则在所有空闲 Control Channel中选择一个并在下一个资源周期上使用此 Control Channel发射竟争 标志信息和 /或控制信息。 这里选择一个空闲 Control Channel的方式包括: 随机选择, 即 UE在所有的空闲 Control Channel中随机选择任意一个 Control Channel使用;
或者, UE根据 Control Channel的分组进行选择, 此时 Control Channel 本身划分为不同属性或优先级分组 , 每组中的 Control Channel所包含的资 源量、 或者其对应 Data Channel 所包含的资源量不同, 或者每组 Control Channel及其对应的 Data Channel所能承栽的业务数据属性或优先级不同等, UE可按照自身需求在适用的分组中选择一个 Control Channel使用;
或者,UE根据待发送的 D2D业务数据需求选择适用的 Control Channel , 这里数据需求包括业务类型(如 VoIP、视频、文件等)、业务优先级要求(如 数据所对应的优先等级)等;
或者, UE根据本身的属性和 /或优先级选择选择相应的 Control Channel , 如 UE为普通 D2D UE、 或高级别 D2D UE等, 可相应选择不同的 Control Channel。
UE在所选择的 Control Channel上发送竟争标志信息和 /或控制信息, 其中, 竟争标志信息用于表示此 Control Channel 已被使用, 则其他监听 Control Channel的 UE接收到此 Control Channel上的信号,并检测到此竟争 标志信息后, 获知此 Control Channel资源已被使用, 不是空闲信道资源 , 不能竟争使用此信道资源及其对应的 Data Channel资源。
优选的 , 竟争标志信息可以包括 lbit或 n bit ( n为大于 1的正整数 )信 息, 当竟争标志信息仅包括 lbit信息时, 即此竟争标志信息为一个竟争标 志位, 如: 当 l bit信息值为 1时, 表示此 Control Channel资源被使用, 信 息值为 0时,表示此 Control Channel资源空闲。优选的, 当 Control Channel 仅承载竟争标志信息, 不包括控制信息时, 竟争标志信息即体现为在相应 的 Control Channel上是否发射信号,当 UE需要标记使用此 Control Channel 时, 在此信道资源上进行信号发射, 即表示竟争标志位为 1 , 当 UE释放此 信道资源不再使用时, 则不在此信道资源上发射信号, 此信道即为空闲状 态, 相当于竟争标志位为 0。 优选的, 此时可以采用 PUCCH format 1作为 Control Channel发送方式。
当竟争标志信息包括 n bit信息时, n bit信息可以表示 UE对此 Control Channel资源的使用计数值, 体现为对资源周期的计数, 此计数值可以包括 以下两种使用方式:
方式一, n bit信息表示 UE对于此 Control Channel已经使用的资源周 期累计数值, 即表示 UE 已经使用此 Control Channel , 并在相应的 Data Channel上进行信号发射的次数;
方式二, n bit信息表示 UE能够或者需要继续使用此 Control Channel 及 Data Channel的剩余资源周期计数, 即表示 UE将继续使用此信道资源, 并在其 Data Channel上进行信号发射的次数。
在方式一中, UE竟争获得并使用某 Control Channel及其对应的 Data Channel资源时,在每个资源周期上在 Control Channel和 Data Channel上进 行信号发射, 则随着 UE进行信号发射的每个资源周期, 竟争标志信息的 n bit 所表示的资源周期计数加一; 在方式二中, UE 在每个资源周期上在 Control Channel和 Data Channel上进行信号发射,则随着 UE进行信号发射 的每个资源周期, 竟争标志信息的 n bit所表示的资源周期计数减一。 此外, UE在所选择的 Control Channel上发送竟争标志信息和 /或控制 信息, 其中, 控制信息用于对此 Control Channel对应的 Data Channel上承 载业务数据信息的相关控制信息进行指示, 可以包括以下控制信息中的一 项或多项:
Data Channel 承栽业务数据的调制编码方式 ( MCS , Modulation and Coding Scheme )指示, 即 UE将数据处理承载在 Data Channel上所使用的 MCS等级, 取值 0- 15;
对数据进行编码的冗余版本 ( RV )信息, 指示在所发射的信号中所携 带的编码后的冗余 bit相关指示, 取值 0-3;
UE ID信息, 即使用此信道资源进行信号发射的 UE的 ID信息, 例如 UE-RNTI等能够唯一标志此 UE身份的标识信息;
UE发送的业务数据的属性信息, 如业务类型(广播、组播、单播等)、 业务优先级、 业务所属群组等关于业务数据的相关指示信息;
UE在 Data Channel上承栽的业务数据的目标接收 UE ID, 即此业务数 据允许被接收的一个或多个 UE的 ID信息, 具体的 ID信息可以是 UE的 R TK D2D ID等可唯一标志 UE的身份标识信息,或者目标接收用户组 ID, 即 Group ID;
此业务数据重传的计数, 当 UE对所发送的数据按需进行重传时,表示 当前 Data Channel所发射的信号为此数据的初次发射或重传, 通过计数表 示, 例如重传计数值为 0时, 表示为初次传输, 相应的, 计数值为 k时, 表示为第 k次重传。
UE通过在 Control Channel中携带控制信息,对相应 Data Channel中的 业务数据承载进行控制指示, 有利于其他 UE更有效的接收此 Data Channel 中的数据。
由系统预定义 D2D通信中可用的 Control Channel资源数量 , 以及每个 Control Channel所含的具体资源。每个 Control Channel包含一定数量的 PRB, 多个 Control Channel之间还可以进一步以码分 (不同序列 )等方式进行资 源复用。 例如, Control Channel可以使用 LTE PUCCH信道结构, 如图 1 1 所示, 在每个子帧中对应于一对 PRB, 分别在 slot#()和 slot#l上各包含一 个 PRB, 用于承载竟争标志信息和 /或控制信息。 进一步的, 根据系统定义 或者 Control Channel 中所需携带的信息量, UE可以使用 PUCCH format l/la/lb/2/2a/2b/3 中的任意一种格式对竟争标志信息和 /或控制信息进行处 理并承载在相应的 Control Channel信道资源上 , 并进行发送。
由系统预定义 D2D通信中可用的 Data Channel 资源数量, 以及每个 Data Channel所含的具体资源。每个 Data Channel包含一定数量的 PRB,例 如, Data Channel可以使用 LTE PUSCH 信道结构, 在预定义的一个或多个 PRB上, 以 PUSCH信道的方式处理承载 D2D业务数据, 并进行发送。 这 里 D2D业务数据包括广播消息数据、 组播消息数据、 单播消息数据。
下面列举一些实施例进一步详细阐述。
实施例一
根据系统预定义, 以 PUCCH信道作为 Control Channel , 以 PUSCH信 道作为 Data Channel , 共设置 20个 Control Channel及相应的 20个 Data Channel. 在每个无线帧中, 设置 5个子帧作为 D2D通信可用数据子帧, 且 资源周期为 2ms。
如图 12所示, UE在 Frame #n的 sublrame #0上监听全部或部分 Control Channel , 获知了当前空闲的 Control Channel并在其中随机选择 Channel #5 进行资源竟争,在下一个资源周期上,即 subframe #2上,在 Control Channel #5上发射 1 bit竟争标志信息, 表示竟争使用此信道资源, 并在相应的 Data Channel #5上承载业务数据进行发射。 在 subframe #2上, 没有其他 UE选 择竟争使用此资源, 则 UE竟争成功。 当 UE的业务数据在 subframe #2的 Data Channel #5上未发送完成时 ,将继续在下一个资源周期 ,即 subframe #4 上, 继续使用 Control Channel #5发射竟争标志信息, 标记此信道被使用, 并在 Data Channel #5上继续承载发射剩余的业务数据,依次类推, 直至 UE 将所有业务数据发送完成。 实施例二
根据系统预定义, 以 PUCCH信道作为 Control Channel , 以 PUSCH信 道作为 Data Channel, 共设置 20个 Control Channel及相应的 20个 Data Channel。 在每个无线帧中, 设置 5个子帧作为 D2D通信可用数据子帧, 且 资源周期为 2ms。UE A在 Frame #n的 subframe #0上监听全部或部分 Control Channel , 获知了当前空闲的 Control Channel并在其中随机选择 Channel #5 进行资源竟争,在下一个资源周期上,即 subframe #2上,在 Control Channel #5上发射 1 bit竟争标志信息, 表示竟争使用此信道资源, 并在相应的 Data Channel #5上承载业务数据进行发送, 同时 UE B也监听到并选择了当前空 闲的 Control Channel #5 , 并在下一个资源周期上竟争使用此资源。 则在 subframe #2上, UE A和 UE B同时竟争使用了 Control Channel #5及其对应 的 Data Channel #5,此时出现了资源竟争冲突, UE A和 UE B在 Data Channel #5所发射的数据可能无法被其他 UE有效接收。在此情形下, UE A和 UE B 可以各自重新进行资源竟争。 实施例三
系统预定义, 以 PUCCH信道作为 Control Channel , UE需要在 Control Channel中承栽 l bit竟争标志信息, 以及 5bit的 MCS控制信息, UE使用 PUCCH format 3处理上述共计 6bit信息, 并承栽映射在所选择的 Control Channel上进行发送。 实施例四
系统预定义, 以 PUCCH信道作为 Control Channel , UE 在 Control Channel以是否发射信号来表示竟争标志信息, 不包含控制信息。 则 UE使 用 PUCCH format 1 , 将竟争标志位有效信息 T 按照 PUCCH format 1方 式进行处理, 映射在所选择的 Control Channel上进行发送„ 对应上述 D2D数据发送的方法, 本发明实施例还提供了一种 UE, 如 图 13所示, 包括:
第一发送单元 10, 配置为在 D2D控制信道上发送竟争标志信息和 /或 控制信息;
第二发送单元 20, 配置为在所述控制信道对应的数据信道上承载发送 D2D通信业务数据;
其中, 所述控制信道与数据信道为一一对应关系, 且所述控制信道和 数据信道所包含的资源固定。
其中, 所述控制信道和数据信道所包含的资源为系统上行资源或专用 频段资源。
其中, 所述第一发送单元 10配置为, 通过监听全部或部分控制信道, 在其中选择一个空闲的控制信道, 并在下一个资源周期上在所选的控制信 道上发送所述竟争标志信息和 /或控制信息。
其中, 所述通过监听全部或部分控制信道, 在其中选择一个空闲的控 制信道, 包括:
在空闲的控制信道中进行随机选择; 或者
根据控制信道分组、 待发送的业务数据需求、 所述 UE的属性和 /或优 先级, 在空闲的控制信道中进行选择。
其中, 在 D2D控制信道上发送竟争标志信息时, 所述竟争标志信息用 于表示所述控制信道及其对应的数据信道被使用 , 即在下一个可用的资源 周期上, 所述竟争标志信息所在的控制信道及对应的数据信道为非空闲资 所述竟争标志信息中包括资源周期计数值, 所述资源周期计数值表示 所述 UE已经使用所述控制信道及相应数据信道的累计资源周期数; 或者, 所述资源周期计数值表示所述 UE被允许使用所述控制信道及相应数据信 道的剩余资源周期数。
其中, 在 D2D控制信道上发送控制信息时, 所述控制信息是对所述控 制信道对应的数据信道所承栽 D2D通信业务数据进行的控制指示, 所述控 制信息包括以下信息的至少之一:
所述数据信道所使用的 MCS;
待发送业务数据的 UE的 ID;
所述数据信道上承载的业务数据的属性信息;
所述数据信道上承载的业务数据的目标接收 UE的 ID;
所述数据信道上承载的业务数据的编码冗余版本;
所述数据信道上承载的业务数据重传的计数。
其中, 所述资源周期为所述控制信道和 /或数据信道所包含的资源在时 域上重复的最小间隔。
其中, 所述第二发送单元 20配置为, 根据所述控制信道与数据信道的 一一对应关系, 并通过控制信道获得与所述控制信道对应的数据信道的资 源, 所述——对应关系包括以下至少一项: 信道资源对应关系、 信道 ID索 引关系。
其中, 所述控制信道和数据信道所包含的资源固定, 包括:
每个控制信道所包含的 PRB的数量和位置是固定和已知的, 且由系统 预设;
每个数据信道所包含的 PRB的数量和位置是固定和已知的, 由对应的 控制信道及所述——对应关系确定。
所述控制信道可以为 PUCCH, 所述第一发送单元 10 配置为, 按照 PUCCH格式处理承栽所述竟争标志信息和 /或控制信息,将所述竟争标志信 息和 /或控制信息以 PUCCH format l/la/lb/2/2a/2b/3中的任意一种格式进行 处理承载, 并映射到所选的控制信道上进行发送。
所述数据信道可以为 PUSCH, 所述第二发送单元 20配置为, 按照所 述控制信道中的控制信息对 D2D通信业务数据进行处理, 并映射在相应的 数据信道上进行发送。
需要说明的是, 上述第一发送单元 10和第二发送单元 20可以由本发 明实施例所述 UE的中央处理器( CPU, Central Processing Unit )、微处理器 ( MPU, Micro Processing Unit ), 数字信号处理器 (DSP, Digital Signal Processor )或现场可编程门阵列 ( FPGA, Field Programmable Gate Array ), 并结合所述 UE的通信功能芯片来实现。
另外, 本发明实施例还提供了一种计算机可读存储介质, 所述存储介 质包括一组计算机可执行指令, 所述指令用于执行本发明实施例所述的 D2D数据发送的方法。
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, 本发明可采用硬件实施例、 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 存储器和光学存储器等)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栽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。
以上所述, 仅为本发明的较佳实施例而已, 并非用于限定本发明的保 护范围。

Claims

权利要求书
1、 一种设备到设备 D2D数据发送的方法, 该方法包括:
用户设备 UE在 D2D控制信道上发送竟争标志信息和 /或控制信息, 并在所述控制信道对应的数据信道上承载发送 D2D通信业务数据,其中, 所述控制信道与数据信道为——对应关系, 且所述控制信道和数据信道 所包含的资源固定。
2、根据权利要求 1所述 D2D数据发送的方法, 其中, 所述控制信道 和数据信道所包含的资源为系统上行资源或专用频段资源。
3、 根据权利要求 1或 2所述 D2D数据发送的方法, 其中, 所述在 D2D控制信道上发送竟争标志信息和 /或控制信息, 包括:
通过监听全部或部分控制信道, 在其中选择一个空闲的控制信道, 并在下一个资源周期上在所选的控制信道上发送所述竟争标志信息和 /或 控制信息。
4、根据权利要求 3所述 D2D数据发送的方法, 其中, 所述通过监听 全部或部分控制信道, 在其中选择一个空闲的控制信道, 包括:
在空闲的控制信道中进行随机选择; 或者
根据控制信道分组、 待发送的业务数据需求、 所述 UE的属性和 /或 优先级, 在空闲的控制信道中进行选择。
5、 根据权利要求 1或 2所述 D2D数据发送的方法, 其中, 在 D2D 控制信道上发送竟争标志信息时, 所述竟争标志信息用于表示所述控制 信道及其对应的数据信道被使用, 即在下一个可用的资源周期上, 所述 竟争标志信息所在的控制信道及对应的数据信道为非空闲资源。
6、根据权利要求 5所述 D2D数据发送的方法, 其中, 所述竟争标志 信息中包括资源周期计数值,所述资源周期计数值表示所述 UE已经使用 所述控制信道及相应数据信道的累计资源周期数; 或者, 所述资源周期 计数值表示所述 UE被允许使用所述控制信道及相应数据信道的剩余资 源周期数。
7、 根据权利要求 1或 2所述 D2D数据发送的方法, 其中, 在 D2D 控制信道上发送控制信息时, 所述控制信息是对所述控制信道对应的数 据信道所承载 D2D通信业务数据进行的控制指示, 所述控制信息包括以 下信息的至少之一:
所述数据信道所使用的调制编码方式 MCS;
待发送业务数据的所述 UE的标识 ID;
所述数据信道上承载的业务数据的属性信息;
所述数据信道上承栽的业务数据的目标接收 UE的 ID;
所述数据信道上承栽的业务数据的编码冗余版本:
所述数据信道上承载的业务数据重传的计数。
8、根据权利要求 3所述 D2D数据发送的方法, 其中, 所述资源周期 为所述控制信道和 /或数据信道所包含的资源在时域上重复的最小间隔。
9、根据权利要求 1或 2所述 D2D数据发送的方法, 其中, 该方法还 包括: 根据所述控制信道与数据信道的——对应关系, 并通过控制信道 获得与所述控制信道对应的数据信道的资源, 所述——对应关系包括以 下至少一项: 信道资源对应关系、 信道 ID索引关系。
10、 根据权利要求 1或 2所述 D2D数据发送的方法, 其中, 所述控 制信道和数据信道所包含的资源固定, 包括:
每个控制信道所包含的物理资源块 PRB的数量和位置是固定和已知 的, 且由系统预设;
每个数据信道所包含的 PRB的数量和位置是固定和已知的, 由对应 的控制信道及所述——对应关系确定。
11、根据权利要求 10所述 D2D数据发送的方法, 其中, 所述控制信 道为物理上行控制信道 PUCCH, 所述 UE按照 PUCCH格式处理承载所 述竟争标志信息和 /或控制信息, 将所述竟争标志信息和 /或控制信息以
PUCCH format l/la/lb/2/2a/2b/3中的任意一种格式进行处理承栽,并映射 到所选的控制信道上进行发送。
12、根据权利要求 10所述 D2D数据发送的方法, 其中, 所述数据信 道为物理上行共享信道 PUSCH, 所述 UE按照所述控制信道中的控制信 息对 D2D通信业务数据进行处理,并映射在相应的数据信道上进行发送。
13、 一种用户设备, 包括:
第一发送单元,配置为在 D2D控制信道上发送竟争标志信息和 /或控 制信息;
第二发送单元, 配置为在所述控制信道对应的数据信道上承载发送 D2D通信业务数据;
其中, 所述控制信道与数据信道为一一对应关系, 且所述控制信道 和数据信道所包含的资源固定。
14、 根据权利要求 13所述用户设备, 其中, 所述控制信道和数据信 道所包含的资源为系统上行资源或专用频段资源。
15、 根据权利要求 13或 14所述用户设备, 其中, 所述第一发送单 元配置为, 通过监听全部或部分控制信道, 在其中选择一个空闲的控制 信道, 并在下一个资源周期上在所选的控制信道上发送所述竟争标志信 息和 /或控制信息。
16、 根据权利要求 15所述用户设备, 其中, 所述通过监听全部或部 分控制信道, 在其中选择一个空闲的控制信道, 包括:
在空闲的控制信道中进行随机选择; 或者
根据控制信道分组、 待发送的业务数据需求、 所述 UE的属性和 /或 优先级, 在空闲的控制信道中进行选择。
17、 根据权利要求 13或 14所述用户设备, 其中, 在 D2D控制信道 上发送竟争标志信息时, 所述竟争标志信息用于表示所述控制信道及其 对应的数据信道被使用, 即在下一个可用的资源周期上, 所述竟争标志 信息所在的控制信道及对应的数据信道为非空闲资源。
18、 根据权利要求 17所述用户设备, 其中, 所述竟争标志信息中包 括资源周期计数值,所述资源周期计数值表示所述 UE已经使用所述控制 信道及相应数据信道的累计资源周期数; 或者, 所述资源周期计数值表 示所述 UE被允许使用所述控制信道及相应数据信道的剩余资源周期数。
19、 根据权利要求 13或 14所述用户设备, 其中, 在 D2D控制信道 上发送控制信息时, 所述控制信息是对所述控制信道对应的数据信道所 承载 D2D通信业务数据进行的控制指示, 所述控制信息包括以下信息的 至少之一:
所述数据信道所使用的调制编码方式 MCS;
待发送业务数据的所述 UE的标识 ID;
所述数据信道上承载的业务数据的属性信息;
所述数据信道上承载的业务数据的目标接收 UE的 ID;
所述数据信道上承载的业务数据的编码冗余版本;
所述数据信道上承载的业务数据重传的计数。
20、 根据权利要求 15所述用户设备, 其中, 所述资源周期为所述控 制信道和 /或数据信道所包含的资源在时域上重复的最小间隔。
21、 根据权利要求 13或 14所述用户设备, 其中, 所述第二发送单 元配置为, 根据所述控制信道与数据信道的——对应关系, 并通过控制 信道获得与所述控制信道对应的数据信道的资源 , 所述——对应关系包 括以下至少一项: 信道资源对应关系、 信道 ID索引关系。
22、 根据权利要求 13或 14所述用户设备, 其中, 所述控制信道和 数据信道所包含的资源固定, 包括:
每个控制信道所包含的物理资源块 PRB的数量和位置是固定和已知 的, 且由系统预设; 每个数据信道所包含的 PRB的数量和位置是固定和已知的, 由对应 的控制信道及所述——对应关系确定。
23、 根据权利要求 22所述用户设备, 其中, 所述控制信道为物理上 行控制信道 PUCCH, 所述第一发送单元配置为, 按照 PUCCH格式处理 承栽所述竟争标志信息和 /或控制信息, 将所述竟争标志信息和 /或控制信 息以 PUCCH format l/la/lb/2/2a/2b/3中的任意一种格式进行处理承载, 并映射到所选的控制信道上进行发送。
24、 根据权利要求 22所述用户设备, 其中, 所述数据信道为物理上 行共享信道 PUSCH, 所述第二发送单元配置为, 按照所述控制信道中的 控制信息对 D2D通信业务数据进行处理, 并映射在相应的数据信道上进 行发送。
25、 一种计算机可读存储介质, 所述存储介质包括一组计算机可执 行指令,所述指令用于执行权利要求 1-12任一项所述的 D2D数据发送的 方法。
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