WO2015169050A1 - 基于竞争的资源选择方法、装置和计算机存储介质 - Google Patents

基于竞争的资源选择方法、装置和计算机存储介质 Download PDF

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Publication number
WO2015169050A1
WO2015169050A1 PCT/CN2014/088267 CN2014088267W WO2015169050A1 WO 2015169050 A1 WO2015169050 A1 WO 2015169050A1 CN 2014088267 W CN2014088267 W CN 2014088267W WO 2015169050 A1 WO2015169050 A1 WO 2015169050A1
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Prior art keywords
time domain
resource
unit
result
channel
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PCT/CN2014/088267
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English (en)
French (fr)
Inventor
王文焕
杨瑾
吴栓栓
黄双红
袁明
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中兴通讯股份有限公司
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Priority to EP14891303.1A priority Critical patent/EP3142411A4/en
Priority to US15/308,247 priority patent/US20170079069A1/en
Publication of WO2015169050A1 publication Critical patent/WO2015169050A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access, e.g. scheduled or random access
    • H04W74/08—Non-scheduled or contention based access, e.g. random access, ALOHA, CSMA [Carrier Sense Multiple Access]
    • H04W74/0808—Non-scheduled or contention based access, e.g. random access, ALOHA, CSMA [Carrier Sense Multiple Access] using carrier sensing, e.g. as in CSMA
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access, e.g. scheduled or random access
    • H04W74/08—Non-scheduled or contention based access, e.g. random access, ALOHA, CSMA [Carrier Sense Multiple Access]
    • H04W74/0808—Non-scheduled or contention based access, e.g. random access, ALOHA, CSMA [Carrier Sense Multiple Access] using carrier sensing, e.g. as in CSMA
    • H04W74/0825—Non-scheduled or contention based access, e.g. random access, ALOHA, CSMA [Carrier Sense Multiple Access] using carrier sensing, e.g. as in CSMA carrier sensing with collision detection
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H04W72/0446—Resources in time domain, e.g. slots or frames
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H04W72/0453—Resources in frequency domain, e.g. a carrier in FDMA
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access, e.g. scheduled or random access
    • H04W74/08—Non-scheduled or contention based access, e.g. random access, ALOHA, CSMA [Carrier Sense Multiple Access]
    • H04W74/0808—Non-scheduled or contention based access, e.g. random access, ALOHA, CSMA [Carrier Sense Multiple Access] using carrier sensing, e.g. as in CSMA
    • H04W74/0816—Non-scheduled or contention based access, e.g. random access, ALOHA, CSMA [Carrier Sense Multiple Access] using carrier sensing, e.g. as in CSMA carrier sensing with collision avoidance
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L2101/00—Indexing scheme associated with group H04L61/00
    • H04L2101/60—Types of network addresses
    • H04L2101/618—Details of network addresses
    • H04L2101/654—International mobile subscriber identity [IMSI] numbers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W92/00—Interfaces specially adapted for wireless communication networks
    • H04W92/16—Interfaces between hierarchically similar devices
    • H04W92/18—Interfaces between hierarchically similar devices between terminal devices

Definitions

  • the present invention relates to a resource selection technology in the communication field, and in particular, to a contention-based resource selection method, apparatus, and computer storage medium.
  • the device In the field of wireless communication, there are usually time-frequency resource occupations of different devices based on the competition mechanism.
  • the time-frequency resource occupation of such a competition mechanism inevitably leads to resource occupation conflict.
  • the device In a specific half-duplex communication device, the device will first listen to the occupation status of each channel before transmitting the data, and determine the channel and time for transmitting the data according to the interception result. The first listening to some extent alleviates the competition of resources that multiple devices use to transmit data on the same channel at the same time.
  • the competition conflict between devices is still fierce, and the collision of resources is often caused, resulting in information. Unable to send in time.
  • embodiments of the present invention are expected to provide a contention-based resource selection method, apparatus, and computer storage medium to reduce resource occupancy collision and rediscovery.
  • a first aspect of the present invention provides a contention-based resource selection method, the method comprising:
  • the first interception result includes at least channel occupation information and/or collision information in the nth time domain unit;
  • n is 0 or a positive integer.
  • the method further includes:
  • the second listening result at least includes channel occupation information and/or collision information in the n+1th time domain unit;
  • the time-frequency resource for selecting data transmission according to the first interception result is:
  • the method further includes:
  • the data includes the second listening result.
  • Receiving the first interception result in the (n+1)th time domain unit includes:
  • the time-frequency resource that is selected according to the first interception result or the first interception result and the second interception result selection data includes:
  • One channel is selected in the vacant channel for data transmission.
  • the selecting one channel in the vacant channel for data transmission includes:
  • a channel is selected from the spare channels for data transmission according to the selection sequence.
  • the terminal attribute information includes: an IMEI of the terminal and an IMSI of the terminal;
  • the communication attribute information includes: Tx-UE ID, Rx-UE ID, group ID, and terminal booting The formed sub-frame number or a randomly formed random sequence.
  • the selecting, according to the selection sequence, one channel from the vacant channel for data transmission comprises:
  • a vacant channel for data transmission is selected according to a mapping relationship between the modulo residual value and a vacant channel.
  • the time-frequency resources of the first interception result and the second interception result selection data transmission include:
  • the collision information in the first listening result or the second listening result indicates that a resource occupation collision occurs, selecting according to the backoff policy, the first interception result, and the second interception result Time-frequency resources for data transmission.
  • the time-frequency resource for selecting data transmission according to the backoff policy, the first interception result, and the second interception result includes:
  • a second aspect of the embodiments of the present invention provides a contention-based resource selection method, where the method includes:
  • a third aspect of the embodiments of the present invention provides a contention-based resource selection method, where the method includes:
  • a vacant channel is selected in accordance with the selection sequence.
  • the method comprises:
  • the acquiring the selection sequence is: forming a selection sequence according to the terminal attribute information and/or the communication attribute information.
  • the terminal attribute information includes: an IMEI of the terminal and an IMSI of the terminal;
  • the communication attribute information includes: a Tx-UE ID, an Rx-UE ID, a group ID, a subframe number formed by the terminal booting, or a randomly formed random sequence.
  • the selecting the vacant channel according to the selection sequence comprises:
  • a vacant channel for data transmission is selected according to a mapping relationship between the modulo residual value and a vacant channel.
  • a fourth aspect of the embodiments of the present invention provides a contention-based resource selection apparatus, where the apparatus include:
  • a receiving unit configured to receive a first listening result in the (n+1)th time domain unit; the first listening result includes at least channel occupying information and/or collision information in the nth time domain unit;
  • a selecting unit configured to select a time-frequency resource for data transmission according to the first intercepting result
  • n is 0 or a positive integer.
  • the device further comprises:
  • a listening unit configured to listen to obtain a second listening result;
  • the second listening result at least includes channel occupation information and/or collision information in the n+1th time domain unit;
  • the selecting unit is specifically configured to select a time-frequency resource for sending data according to the first listening result and the second listening result.
  • the device further comprises:
  • a sending unit configured to send data by using the time-frequency resource
  • the data includes the second listening result.
  • the receiving unit is configured to receive resource configuration information or control information in the (n+1)th time domain unit; and extract the first listening result from the resource configuration information or the control information.
  • the selecting unit is configured to predict, according to the first listening result or the first listening result and the second listening result, a vacant channel in a time domain unit after the (n+1)th time domain unit; Selecting one of the vacant channels is configured as data transmission.
  • the selecting unit is configured to form a selection sequence according to the terminal attribute information and/or the communication attribute information;
  • Selecting one channel from the spare channels according to the selection sequence is configured as data transmission.
  • the terminal attribute information includes: an IMEI of the terminal and an IMSI of the terminal;
  • the communication attribute information includes: a Tx-UE ID, an Rx-UE ID, a group ID, a subframe number formed by the terminal booting, or a randomly formed random sequence.
  • the selecting unit comprises:
  • a calculation module configured to perform a modulo budget to obtain a modulo residual value according to the selection sequence and the vacant channel
  • the selecting module is configured to select a vacant channel configured to be data transmission according to the mapping relationship between the modulo residual value and the vacant channel.
  • the selecting unit is configured to: when the collision information in the first listening result or the second listening result indicates that a resource occupation collision occurs, according to the backoff policy, the first listening result, and the The second listening result selects a time-frequency resource for data transmission.
  • the selecting unit is configured to determine a time domain preference level according to a frequency domain resource sequence number in which a resource occupation collision occurs; and determine a time domain resource for each data transmission according to the size of the time domain preference level time domain domain backoff window;
  • a fifth aspect of the embodiments of the present invention provides a contention-based resource selection apparatus, where the apparatus includes:
  • the first determining unit is configured to determine a time domain priority of each retransmitted data according to the frequency domain resource serial number previously occupied by the retransmission data, or determine each retransmission according to the sequence of time domain resources previously occupied by the retransmitted data Frequency domain priority of the data;
  • the second determining unit is configured to determine, according to the size of the time domain priority level time domain backoff window, the time domain resource for sending each retransmission data, or according to the frequency domain preference level and the size of the frequency domain backoff window. Determine the frequency domain resources for sending each retransmission data.
  • a sixth aspect of the embodiments of the present invention provides a contention-based resource selection apparatus, where the apparatus includes:
  • a third determining unit configured to determine a vacant channel
  • the fourth determining unit is configured to select the vacant channel according to the selection sequence.
  • the acquiring unit is configured to form a selection sequence according to the terminal attribute information and/or the communication attribute information.
  • the terminal attribute information includes: an IMEI of the terminal and an IMSI of the terminal;
  • the communication attribute information includes: a Tx-UE ID, an Rx-UE ID, a group ID, a subframe number formed by the terminal booting, or a randomly formed random sequence.
  • the fourth determining unit is configured to perform a modulo budget to obtain a modulo residual value according to the selection sequence and the vacant channel; and select a configuration according to the mapping relationship between the modulo residual value and the vacant channel.
  • a seventh aspect of the embodiments of the present invention provides a computer storage medium, where the computer storage medium stores computer executable instructions, and the computer executable instructions are used to execute the methods of the first to third aspects of the embodiments of the present invention. At least one of them.
  • the contention-based resource selection method and apparatus and the computer storage medium according to the embodiments of the present invention the terminal receives the first interception result including the occupancy status information and/or the collision information sent by the other device before transmitting the data, and the terminal will According to the first interception result, the collision status of each channel in the subsequent time is obtained, thereby reducing the probability of conflict with the transmission resource selection of other terminals, which is beneficial to timely and normal data transmission.
  • the terminal can reduce the number of self-listening time domain units by receiving the listening result sent by other terminals, thereby reducing power consumption.
  • FIG. 1 is a schematic flowchart of a contention-based resource selection method according to an embodiment of the present invention
  • FIG. 2(a) is a schematic diagram of a SA scheduling period according to an embodiment of the present invention.
  • FIG. 2(b) is a schematic diagram of a SA scheduling period according to an embodiment of the present invention.
  • FIG. 3 is a schematic diagram of time-frequency resource selection according to a method according to an embodiment of the present invention.
  • FIG. 4 is a second schematic diagram of time-frequency resource selection according to the method according to the embodiment of the present invention.
  • FIG. 5 is a third schematic diagram of time-frequency resource selection according to the method according to the embodiment of the present invention.
  • FIG. 6(a) is a third schematic diagram of time-frequency resource selection according to the method according to the embodiment of the present invention.
  • FIG. 6(b) is a fourth schematic diagram of time-frequency resource selection according to the method according to the embodiment of the present invention.
  • FIG. 7 is a schematic structural diagram of a contention-based resource selection apparatus according to an embodiment of the present invention.
  • Embodiment 1 is a diagrammatic representation of Embodiment 1:
  • this embodiment provides a contention-based resource selection method, where the method includes:
  • Step S110 Receive a first listening result in the (n+1)th time domain unit; the first listening result at least includes channel occupation information and/or collision information in the nth time domain unit;
  • Step S120 Select a time-frequency resource for transmitting data according to the first interception result
  • n is 0 or a positive integer.
  • the terminal will listen before sending the data; for example, if the data needs to be transmitted in the third time domain unit, the terminal A will listen to the second time domain unit. Occupancy information and/or collision information of each channel in the channel; thereby predicting the contention of other terminals in the third time domain unit for each channel, and terminal A will select one channel to transmit data according to the prediction result as far as possible.
  • terminal A only listens to the second time domain unit, but in the first time domain, a collision phenomenon occurs.
  • the data that needs to be sent by the two terminals that transmit the collision may need to be in the third time domain.
  • Retransmission in the unit; or terminal B has occupied channel A in the first time domain unit, and terminal B will use each channel time unit in a certain period to occupy channel A to send data until the data packet transmission is completed;
  • Listening to the second time domain unit only it is obvious that the terminal A may consider that the channel A is in the third time domain unit when the channel is free; thus, the terminal A will contend for the channel A; and the terminal A and the terminal B both contend for the channel A, thereby causing the resource occupation collision phenomenon.
  • the data that needs to be sent by terminal A and terminal B cannot be sent in time.
  • B and C are both sent in the first unit and cannot listen to each other, B and C will listen to the second unit and also know whether they collide in the first time unit or other users at the same time, so according to the back-off principle. Select Resend in the scheduling window.
  • the terminal A receives the first listening result in the first time domain unit sent by the other terminal in the second time domain unit; thus, the terminal 2 will know the first time.
  • the first listening result of the domain unit and selecting a time-frequency resource for transmitting data according to the first listening result.
  • the time domain backoff may be performed according to the backoff policy; and the third time domain unit may be predicted according to the first interception result. Which channels are highly competitive, and the less competitive channel is selected as the frequency domain resource for data transmission.
  • the first n+1 time domain unit before transmitting data further receives, by the other terminal, at least one of channel occupancy information and collision information including at least the nth time domain unit.
  • the n+1th time domain unit is preferably a time domain unit in which the terminal starts to listen; thereby enabling the terminal to acquire more channel occupation information and collision information, Obtaining more accurate prediction results, which can more rationally select the resources for transmitting data, has the advantages of reducing the collision frequency, reducing the number of data retransmissions, and improving the timeliness of data transmission.
  • the method further includes:
  • the second listening result at least includes channel occupation information and/or collision information in the n+1th time domain unit;
  • the time-frequency resource for selecting the transmission data according to the first interception result is:
  • the terminal will listen to each channel in the (n+1)th time domain unit to form a second interception result
  • step S120 the time-frequency resource of the transmitted data is determined according to the first listening result and the second listening result.
  • the first listening result and the second listening result may both include channel occupation information of the monitored time domain unit and collision information.
  • the channel occupation information and the collision information may be represented by a bit bitmap; specifically, an SA field as shown in FIG. 2; there are N channels in the SA domain; and 1 bit may be used for each channel. Whether the channel is occupied or not, N channels require N bits. Similarly, 1 bit can be selected for each channel to see if there are two states of resource occupancy collision.
  • the first listening result and the second listening result are represented by the above bitmap, which is simple and clear.
  • One SA period includes an SA domain and a service area; each SA corresponds to N channels in the frequency domain.
  • the N SA channels included in the SA domain may be continuously or discretely distributed in the time domain. In Fig.
  • the SA domains of one SA period are consecutively separated in the time domain; in Fig. 2(b), the SA domains of one SA period are discretely distributed in the time domain.
  • the SA scheduling period of the UE may be the same or different. In the scheduling period, the information content of the SA changes little, and the transmission is repeated. The SA is newly transmitted outside the scheduling period, and the number of retransmissions of the SA is smaller than the SA scheduling window. .
  • the first listening result may include only channel occupation information, may include only collision information, and may include both channel occupation information and collision information.
  • the terminal can know, according to the channel occupation information, whether each channel in the time domain unit being intercepted is occupied, thereby knowing which channels have been pre-occupied by other terminals, and predicting which channels will be next time according to a pre-stored channel occupancy policy.
  • the competition is small.
  • the terminal can know, according to the collision information, the number of occurrences of resource occupation collisions caused by different terminals in the time domain unit being intercepted by the same time-frequency resource, thereby determining whether there is a terminal that needs to resend data, and according to the data retransmission policy, It is predicted which channels will compete less.
  • the terminal is configured to select a time-frequency resource with less competition according to the prediction result to transmit data, thereby reducing the competition degree of the terminal to the same time-frequency resource, reducing retransmission and resources. Occupy collision.
  • the first listening result is at least partially different from the second listening result, and the first listening result and the time domain unit that the second listening result is monitored
  • the time domain unit may specifically be a time period of one or more subframes, one or more time slots, or one or more micro frames.
  • the method further includes: after selecting the time-frequency resource for data transmission, further comprising: transmitting data by using the time-frequency resource selected in the step S120; and the data includes the second interception result.
  • the data is resource configuration information or control information
  • the second interception result is carried in the resource configuration information or control information, so that subsequent terminals can obtain the second interception result, and select a channel or a time domain. unit.
  • the step S110 includes:
  • the contention-based resource selection method in this embodiment is applicable to the scheduling and scheduling of SA domain resources in the SA (Scheduling Assignment) domain in the communication scenario of the D2D (Device to Device).
  • the step S110 may be: the terminal that pre-selects the data for transmitting the time-frequency resource, and when receiving the channel occupancy status and/or the collision information in the time domain unit, the terminal itself also receives the first listening result sent by the other terminal;
  • the first listening result is carried in the resource configuration information or the control information; therefore, the first listening result needs to be extracted from the resource configuration information or the control information. Carrying the first listening result in the resource configuration information or the control information to send and receive together, so as to avoid additionally opening a dedicated time-frequency resource to send the first listening result, which is compatible with the prior art.
  • the implementation is relatively simple.
  • FIG. 3 is a schematic diagram of time-frequency resources of an SA domain, where Fx represents the xth channel of the frequency domain resource, and x is a label of the time domain resource, and the specific value is an integer ranging from 0 to 5; For example, the 0th channel F0 and the first channel F1, etc.; Ty represents the yth time domain unit of the time domain resource, and the y is the label of the frequency domain resource, and the specific value is an integer of 0 to 5; Time domain unit T0 and first time domain unit T1, and the like.
  • the time-frequency resources of the SA domain may be continuously distributed time-frequency resources as shown in FIG. 2, or may be time-frequency resources discretely distributed in the frequency domain and/or the time domain.
  • the terminal UE3, the terminal UE4, and the terminal UE5 that do not transmit data in the time domain unit T0 can listen to T0 to form a first listening result; the first listening result is that the terminal UE1 and the terminal UE2 respectively occupy the F0 and F2 transmissions. Data, and there is no collision at T0.
  • the terminal UE3 that is ready to transmit data may listen to T0 to form a first listening result.
  • the UE3 transmits data.
  • the UE3 broadcasts or multicasts the first listening result together; at the same time, at least the terminal UE1, the terminal UE4, and the terminal UE5, which are ready to transmit data, will listen to T1 themselves.
  • UE1, UE4, and UE5 will determine to select a channel within T2 within the time domain unit based on the first listening result and the second listening result.
  • time-frequency resource that selects the sending data according to the first listening result or the first listening result and the second listening result includes:
  • One channel is selected in the vacant channel for data transmission.
  • a vacant channel is obtained according to the first listening result and the second listening result.
  • the so-called vacant channel is obtained by decoding each channel of the SA, and obtaining the channel with the correct decoding as the channel occupation.
  • the channel for obtaining the decoding error is the channel collision or the channel quality is poor, and the channel without the information is the vacant channel.
  • the terminal preferably selects the vacant channel as the time-frequency resource for data transmission, which is beneficial to alleviating the competition between the terminals for the same time-frequency resource, avoiding excessive collision phenomena, reducing data retransmission, and improving the timeliness of data transmission.
  • the terminal UE4 and the UE5 know that the F0 is occupied by the terminal UE1 according to the first interception result, and the terminal UE4 is preferentially occupied by the same channel after occupying a channel at a certain time. It is more intense to predict that F0 may be occupied by UE1 again, and it is preferable to select channels in channels F1 to F5.
  • the F1 to the F5 are the vacant channels.
  • this embodiment makes further improvements, as follows:
  • the selecting one channel in the vacant channel for data transmission includes:
  • a channel is selected from the spare channels for data transmission according to the selection sequence.
  • Different terminal attribute information is different, and communication attribute information of different terminals is different. Therefore, in order to prevent multiple terminals from randomly selecting a vacant channel, resource occupation collision occurs.
  • terminal attribute information and communication attributes At least one of the information determines the time-frequency resource for data transmission, which again mitigates competition for the same resource between different terminals, and is advantageous for collision and rediscovery reduction.
  • the terminal attribute information includes: one of an International Mobile Equipment Identity (IMEI) of the terminal and an International Mobile Subscriber Identity (IMSI) of the terminal;
  • IMEI International Mobile Equipment Identity
  • IMSI International Mobile Subscriber Identity
  • the communication attribute information includes: a Tx-UE ID (Transmit terminal identity) sender identification number, a Rx-UE ID (receive terminal identity) receiver identification number, a group identification number, and a group ID (in D2D communication) According to the application, it can be divided into a plurality of different groups, such as a fire group, a medical group, etc., which is an information identification number sent by the application layer, or may be a predefined group ID number), and a subframe formed by the terminal booting. Number or randomly formed random sequence.
  • the method for selecting a channel from the vacant channel for data transmission according to the selection sequence may be performed by converting the selection sequence into a value representing a size, and then sorting the values according to the sorting result. To choose a free channel. Specifically, the smaller the sort result is, the smaller the sequence number of the selected spare channel is; or the smaller the sort result is, the larger the sequence number of the selected spare channel is.
  • the specific mapping between the sorting result and the vacant channel can be pre-agreed.
  • selecting, according to the selection sequence, one channel from the vacant channel for data transmission includes:
  • a vacant channel for data transmission is selected according to a mapping relationship between the modulo residual value and a vacant channel.
  • Step A Assuming that the terminal IMEI is M, the M is the selection sequence
  • Step B Perform one-dimensional sorting of P vacant channels; each vacant channel corresponds to a one-dimensional serial number;
  • Step C calculating the M and the P according to the following formula
  • Step D Select a spare channel for data transmission according to the correspondence between the index and the vacant channel.
  • how to obtain the total number of the vacant channels may be obtained by counting the vacant channels, or by reordering the vacant channels.
  • the steps A and B have no certain order, and may be executed simultaneously or sequentially.
  • the parameters corresponding to the vacant channel include channels in the frequency domain, and time domain units in the time domain.
  • the time domain unit can also be selected according to the selection sequence, thereby implementing the selection of the vacant channel, as follows:
  • Step A1 Assuming that the terminal IMEI is M, the M is the selection sequence
  • Step B1 Sort the P vacant channels, and sort them in the time domain and the frequency domain respectively; if the total number of time domains corresponding to the P channels is p1; the total number of channels in the corresponding frequency domain is S;
  • Step C1 calculating the M and the P according to the following formula
  • Step D1 According to the correspondence between the index1 and the index2 and the vacant channel, a vacant channel is selected for data transmission.
  • the mapping relationship between the modulo residual value and the vacant channel is known in advance. If the vacant channel is reordered, the reordered one-dimensional sequence number can be used to indicate the vacant channel. If this When the mode modulo residual value is 3, it can correspond to the vacant channel with sequence number 3 after reordering.
  • the selection of the vacant channel is determined according to the mapping relationship between the modulo residual value and the vacant channel, and the competition degree of different terminals for the same time-frequency resource is reduced again compared with one of the randomly selected vacant channels.
  • the first listening result and the second listening result select time-frequency resources for sending data, including:
  • the collision information in the first listening result or the second listening result indicates that a resource occupation collision occurs, selecting according to the backoff policy, the first interception result, and the second interception result Time-frequency resources for data transmission.
  • the backoff policy includes at least one of a time domain backoff policy and a frequency domain backoff policy; the time domain backoff policy is a time domain unit that delays data transmission if the selected frequency domain channel is unchanged; the frequency domain backoff The strategy is to select other channels to send data if the time domain unit is unchanged.
  • the backoff policy selects at least one of a time domain backoff policy and a frequency domain backoff policy according to a current resource competition situation. After the resource occupancy collision, if there are more vacant channels in the next time domain unit, the frequency domain backoff strategy may be preferred at this time; if there are fewer vacant channels in the next time domain unit, the time domain backoff strategy is preferred. In the specific implementation process, the time domain backoff strategy and the frequency domain backoff strategy may also be used in cross.
  • a method for retransmitting a time-frequency resource according to the backoff policy, the first interception result, and the second interception result is specifically provided as follows:
  • the time-frequency resource for selecting data transmission according to the backoff policy, the first interception result, and the second interception result includes:
  • the foregoing backoff strategy is particularly applicable to discovering when a resource occupation collision occurs when two or more time-frequency resources occur according to the first interception result and the second interception result.
  • the backoff strategy is generally used for the selection of time-frequency resources for data retransmission; if the data 1 sent by the terminal 1 has a resource occupation collision in the first transmission, causing the data to be failed, the data is retransmitted. At this time, the terminal 1 determines that the retransmission needs to be performed according to the collision information in the first and/or second interception result, and determines that the data is retransmitted according to the backoff policy and the interception result.
  • the terminal other than the terminal 1 predicts which time-frequency resource the terminal 1 will transmit based on the backoff policy and the first and/or second interception result, and determines the time-frequency resource for transmitting the data by itself.
  • UE4 and UE5 compete for the same channel F3, causing a resource occupation collision phenomenon; at this time, the terminals UE2 and UE3 that do not transmit data can form a first interception result; For the purpose of terminal power saving, devices interested in D2D transmission/reception will be monitored in the T3 unit, such as UE2.
  • the first interception result is also sent; the first interception result includes collision information that indicates that the resource occupation collision phenomenon is transmitted between the UE4 and the UE5.
  • the ready-to-send data UE4 and UE5 now listen to T3 to form a second listening result.
  • the UE4 learns that the data sent in the T2 is not successfully sent according to the first interception result, and needs to be reselected and sent. If the backoff policy pre-stored by the UE4 is a time domain backoff policy, and the backoff window size of the time domain backoff policy 0; UE4 will retransmit the data on the third channel F3 of the time domain unit T4.
  • the UE5 learns that the data sent in T2 is not successfully sent according to the first interception result, and needs to be heavy. If the backoff policy pre-stored by the UE5 is a time domain backoff policy, and the backoff window size of the time domain backoff policy is 1; the UE5 will retransmit the data on the third channel F3 of the time domain unit T5. .
  • UE1 and UE5 have a resource occupation collision; UE2 is intercepted at T0 to form a first interception result, and when resource configuration information or control information is sent on T1, If the first interception result is sent, the UE1 and the UE5 that have not sent the data at this time can receive the first listening result sent by the UE2, and learn that the resource occupation collision occurs in the F0 of the T0, and the data is not successfully sent; The data previously prepared by UE5 through time-frequency resources T0 and F0 needs to be retransmitted.
  • UE1 and UE5 both adopt a time backoff strategy; according to the first interception result and the time backoff policy, UE1 will retransmit the data on F0 of T2; UE5 will use F1 according to the first interception result and time backoff policy at T3. Resend the data.
  • the resource occupation collision of UE1 and UE5 occurs on the time-frequency resources T0, F0; the time domain unit T0 that the terminal UE2 that does not transmit data at this time forms the first listening result.
  • the UE2 will also synchronously transmit the first interception result when the T1 sends the resource configuration information or the control information; the UE1, the UE3, the UE4, and the UE5 that do not transmit the data receive the information sent by the UE2, and also listen to T1.
  • the terminal UE1 finds that the data sent by the time-frequency resource T0, F0 is not successfully transmitted due to the resource occupation collision, and needs to be retransmitted; the UE1 preferentially retransmits the data and selects the time-frequency resource T2.
  • F0 sends resend data.
  • the terminal UE5 finds that the data sent by the time-frequency resource T0, F0 is not successfully transmitted according to the first interception result, and the UE5 preferentially retransmits the data transmission, and according to the first interception result, in order to avoid the collision of the resource occupation with the UE1 again, the time is adopted.
  • the domain backoff strategy and the frequency domain backoff strategy are combined to select the time-frequency resources T3 and F4 to send retransmission data.
  • the resource occupancy collision between the terminal UE1 and the terminal UE5 is transmitted on the time-frequency resources T0 and F2; the transmitting terminal UE2 and the terminal UE3 transmit the resources on the time-frequency resources T1 and F0.
  • the time-frequency resource that is selected according to the backoff policy, the first interception result, and the second interception result is: a frequency domain resource number according to a resource occupation collision, Determining a time domain preference level; and determining a time domain resource for transmitting each retransmission data according to the size of the time domain preference level and the time domain backoff window; and if the frequency domain resource number is smaller, the time domain priority is higher;
  • the time domain priority of UE2 and UE3 will be higher than that of UE1 and UE5.
  • the UE2 and UE3 will be preferentially allocated to UE2 and UE3 even if the resource occupancy collision of UE2 and UE3 occurs first.
  • the specific distribution is shown in Figure 6(a).
  • T2 it is assumed that only one channel in T2 is a vacant channel, and then UE1, UE2, UE3, and UE5 are allocated time-frequency resources. Since the time domain priorities of UE2 and UE3 are high, the vacant channel is preferentially allocated to UE2 and UE3 at this time. If the time domain backoff window of UE2 is 0 at this time, the time domain backoff window of UE3 is 1. Then the vacant channel in T2 is allocated to UE2.
  • the resource occupying collision between the terminal UE1 and the terminal UE5 is transmitted on the time-frequency resources T0 and F2; and the transmitting terminal UE2 and the terminal UE3 transmit the resource occupation collision on the time-frequency resources T1 and F0;
  • the time-frequency resource that is selected according to the backoff policy, the first interception result, and the second interception result is: determining a frequency domain preference level according to a sequence of time domain resources in which the transmission resource occupies a collision Determining, according to the frequency domain preference level and the size of the frequency domain backoff window, the frequency domain resource for transmitting each retransmission data; and the higher the time corresponding to the time domain unit, the greater the frequency domain priority, UE2
  • the frequency domain priority of the UE3 and the UE3 will be lower than the frequency domain priority of the UE1 and the UE5.
  • the frequency domain resources are insufficient, the UE1 and the UE5 are preferentially allocated to the UE1 and the UE5, and are prefer
  • the terminal that is listening may not receive the first listening result, the terminal may still According to the backoff principle and the vacant channel selection method according to the embodiment, the time-frequency resource for transmitting data is selected.
  • the data transmission includes data retransmission, new transmission, and retransmission.
  • the present embodiment provides a contention-based resource selection method.
  • the terminal not only listens to the channel occupancy information and/or collision information of the time domain unit but also receives the interception result sent by other terminals, thereby obtaining More channel occupancy information and/or collision information can accurately predict which channel time space information, thereby reducing the occurrence of resource occupation collision phenomenon; on the other hand, by receiving the interception result sent by other terminals, the terminal itself can be reduced. Listens to the number of time domain units, which reduces power consumption.
  • Embodiment 2 is a diagrammatic representation of Embodiment 1:
  • This embodiment provides a contention-based resource selection method, where the method includes:
  • the method described in this embodiment may be applicable to data retransmission, and specifically includes: when the sending terminal knows the previous sending data through the listening result of the terminal or the listening result of other terminals, the data retransmission occurs when the resource occupation collision occurs. Time-frequency resource selection; at the same time, the terminal can also use the terminal to obtain the interception result and automatically retransmit the data.
  • the data when the data is retransmitted, the data is not transmitted according to the random selection time-frequency resource, but the priority of the time domain or the frequency domain is determined first, and the time-frequency resource is determined according to the determined preference level. Random selection can obviously reduce the competition probability of different terminals occupying the same resource.
  • Embodiment 3 is a diagrammatic representation of Embodiment 3
  • This embodiment provides a contention-based resource selection method, where the method includes:
  • Step 1 Determine the vacant channel
  • Step 2 Obtain a selection sequence
  • Step 3 Select a vacant channel according to the selection sequence.
  • Determining the vacant channel in the step 1 may be determined according to the interception result; the interception result may be received by the terminal itself, or may be received from another terminal; or may include receiving from other terminals at the same time. Listening on your own.
  • a method for randomly selecting a channel to transmit data after determining a vacant channel in the existing method is selected, and selecting a first selection sequence, determining a vacant channel for transmitting data according to the selection sequence, and obtaining different terminals
  • Different selection sequences different terminals will occupy different spare information, thus reducing the terminal's fierce competition for the same time-frequency resources, thereby reducing collisions and rediscovery.
  • the obtaining the selection sequence is: forming a selection sequence according to the terminal attribute information and/or the communication attribute information.
  • the terminal attribute information includes: an IMEI of the terminal and an IMSI of the terminal;
  • the communication attribute information includes: a Tx-UE ID, an Rx-UE ID, a group ID, a subframe number formed by the terminal booting, or a randomly formed random sequence. .
  • selecting a spare channel includes:
  • a vacant channel for data transmission is selected according to a mapping relationship between the modulo residual value and a vacant channel.
  • the method provides a method for selecting a vacant channel to transmit data from a plurality of vacant channels, and changing different terminals that are randomly selected from a plurality of vacant channels in the past.
  • Embodiment 4 is a diagrammatic representation of Embodiment 4:
  • the embodiment provides a contention-based resource selection device, where the device includes:
  • the receiving unit 110 is configured to receive the first listening result in the (n+1)th time domain unit; the first listening result at least includes channel occupation information and/or collision information in the nth time domain unit;
  • the selecting unit 120 is configured to select a time-frequency resource for data transmission according to the first interception result
  • n is 0 or a positive integer.
  • the specific structure of the receiving unit 110 may be a receiving interface, such as a receiving antenna or a receiving antenna array.
  • the specific structure of the selecting unit 120 may be a processor and a storage medium; the storage medium stores executable instructions; and the processor executing the executable instructions may select sending data according to the first listening result.
  • Time-frequency resources The storage medium is preferably a non-transitory storage medium such as a ROM.
  • the processor can be a processing component such as a central processing unit, a microprocessor, a digital signal processor, or a programmable logic array.
  • the apparatus further includes:
  • a listening unit configured to listen to obtain a second listening result;
  • the second listening result at least includes channel occupation information and/or collision information in the n+1th time domain unit and resource allocation and control information of the service data ;
  • the selecting unit 120 is configured to select a time-frequency resource for transmitting data according to the first listening result and the second listening result.
  • the listening unit D2D, transmits/receives the device of interest, and will listen to the SA domain channel in the listening unit.
  • Each channel will be intercepted in the listening time domain unit, and it is judged based on the information obtained from the no channel whether the channel is occupied and whether the channel has transmitted a resource occupation collision. How to judge Whether the collision occurs can be judged by decoding the resource configuration information obtained during the interception process. If the decoding error occurs, the resource occupation collision may occur; and the decoding result of the resource configuration information determines whether the channel is occupied by the north.
  • the specific structure of the listening unit may include a receiving interface and a structure such as a decoder connected to the receiving interface.
  • a sending unit configured to send data by using the time-frequency resource
  • the data includes the second listening result.
  • the specific structure of the transmitting unit may include a communication interface such as a transmitting antenna.
  • the second listening result is preferably carried in the resource configuration information or the control information, so that the time-frequency resource that specifically transmits the second listening result can be not allocated again, thereby achieving simplicity.
  • the receiving unit is further configured to receive resource configuration information or control information in the (n+1)th time domain unit, and extract the first information from the resource configuration information or the control information. Listen for the result.
  • the device in this embodiment receives the first interception result while receiving the resource configuration information or the control information, and receives the resource configuration information or the control information and the first interception result respectively with respect to the terminal, thereby reducing power consumption. And easy to implement.
  • the selecting unit 120 is configured to predict a time domain after the (n+1)th time domain unit according to the first listening result or the first listening result and the second listening result. a vacant channel within the unit; one of the vacant channels is selected for data transmission.
  • the selecting unit 120 is configured to form a selection sequence according to the terminal attribute information and/or the communication attribute information; and select one channel from the spare channels for data transmission according to the selection sequence.
  • the terminal attribute information includes: an IMEI of the terminal and an IMSI of the terminal; the communication attribute information includes: a Tx-UE ID, an Rx-UE ID, a group ID, a subframe number formed by the terminal booting, or a randomly formed random sequence. .
  • the selecting unit 120 includes:
  • a calculation module configured to perform a modulo budget to obtain a modulo residual value according to the selection sequence and the vacant channel
  • the selection module is configured to select a vacant channel for data transmission according to the mapping relationship between the modulo residual value and the vacant channel, and the retransmission device further performs retransmission or new resource selection according to the backoff principle.
  • the specific structure of the calculation module may include an electronic component such as a calculator or a processor having a computing function.
  • the selection module can be a processor with a selection function.
  • the selecting unit 120 is configured to: when the collision information in the first listening result or the second listening result indicates that a resource occupation collision occurs, according to the backoff policy, the first The listening result and the second listening result select time-frequency resources for data transmission.
  • the selection unit 120 specifically selects a time-frequency resource for transmitting data according to the backoff policy, the first interception result, and the second interception result, and includes at least the following two manners.
  • the selecting unit is configured to determine a time domain preference level according to a frequency domain resource sequence number in which a resource occupation collision occurs; and determine a time domain resource for each data transmission according to the size of the time domain preference level and the time domain backoff window;
  • the resource occupation is larger than the time domain retreat window, and the occupied resources are segmented according to the time domain window size according to the time domain priority principle.
  • the selecting unit is configured to determine a frequency domain preference level according to a sequence of time domain resources in which the transmission resource occupies a collision; and determine a frequency domain resource for each data transmission according to the frequency domain preference level and the frequency domain backoff window size.
  • the first mode and the second mode may also be combined at the same time; the specific ones are the cross-use mode one and the second mode.
  • the apparatus described in this embodiment provides hardware for the method described in Embodiment 1.
  • the support can be used to implement any technical solution in the first embodiment, and the same has the advantages of reducing the probability of occurrence of resource occupation collision and retransmission, and reducing the delay of data transmission.
  • the device described in this embodiment may be a terminal that can be used for D2D communication, such as a smart phone and a tablet computer.
  • Embodiment 5 is a diagrammatic representation of Embodiment 5:
  • the embodiment provides a contention-based resource selection device, and the device includes:
  • the first determining unit is configured to determine a time domain priority of each retransmission data according to the frequency domain resource serial number previously occupied by the retransmission data
  • the second determining unit is configured to: according to the time domain priority level time domain backoff window The size of the time domain resource for transmitting each retransmission data is determined; or the frequency domain resource for transmitting each retransmission data is determined according to the frequency domain preference level and the size of the frequency domain backoff window;
  • the first determining unit is configured to determine a frequency domain priority of each retransmitted data according to a sequence of time domain resources previously occupied by the retransmitted data;
  • the second determining unit is configured to determine, according to the frequency domain preference level and the size of the frequency domain backoff window, the frequency domain resource for sending each retransmission data.
  • the specific structure of the first determining unit and the second determining unit may be a processor and a storage medium; the storage medium stores executable instructions; and the processor executes the executable instructions to complete a corresponding function.
  • the storage medium is preferably a non-transitory storage medium such as a ROM.
  • the processor can be a processing component such as a central processing unit, a microprocessor, a digital signal processor, or a programmable logic array.
  • the first determining unit and the second determining unit may respectively correspond to different processors, or may be integrated corresponding to the same processor, and implement time-division multiplexing or different thread implementations to implement the first determining unit and corresponding to the same processor respectively.
  • the function of the second determining unit may be a processor and a storage medium; the storage medium stores executable instructions; and the processor executes the executable instructions to complete a corresponding function.
  • the storage medium is preferably a non-transitory storage medium such as a ROM.
  • the processor can be
  • the present embodiment provides hardware support for the method described in the second embodiment, and can be used to implement any technical solution in the second embodiment.
  • the specific device in this embodiment may be capable of Terminals for D2D communication, such as smartphones and tablets.
  • the embodiment provides a contention-based resource selection device, and the device includes:
  • a third determining unit configured to determine a vacant channel
  • the fourth determining unit is configured to select the vacant channel according to the selection sequence.
  • the specific structure of the third determining unit, the obtaining unit, and the fourth determining unit may be a processor and a storage medium; the storage medium stores executable instructions; and the processor executes the executable instructions to complete the corresponding The function.
  • the storage medium is preferably a non-transitory storage medium such as a ROM.
  • the processor can be a processing component such as a central processing unit, a microprocessor, a digital signal processor, or a programmable logic array.
  • the third determining unit, the obtaining unit, and the second determining unit may respectively correspond to different processors, or may be integrated corresponding to the same processor, and implement time-division multiplexing or different thread implementations respectively when corresponding to the same processor. Determining the function of the unit and the second determining unit.
  • the obtaining unit is configured to form a selection sequence based on the terminal attribute information and/or the communication attribute information.
  • the terminal attribute information includes: an IMEI of the terminal and an IMSI of the terminal;
  • the communication attribute information includes: a Tx-UE ID, an Rx-UE ID, a group ID, a subframe number formed by the terminal booting, or a randomly formed random sequence. .
  • the fourth determining unit is configured to perform a modulo budget to obtain a modulo residual value according to the selection sequence and the vacant channel, and select a data according to a mapping relationship between the modulo residual value and a vacant channel.
  • the vacant channel sent.
  • the present embodiment provides hardware support for the method described in the third embodiment, and can be used to implement any technical solution in the third embodiment.
  • the specific device in this embodiment may be a terminal that can be used for D2D communication. Specific, such as smartphones and tablets.
  • the embodiment of the invention further describes a computer storage medium, which is stored in the computer storage medium
  • the computer executable instructions are stored for at least one of the methods of the embodiments of the present invention; the method of FIG.
  • the computer storage medium may include a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk, and the like, which can store program code; preferably non-transitory storage. medium.
  • ROM read-only memory
  • RAM random access memory
  • magnetic disk or an optical disk and the like, which can store program code; preferably non-transitory storage. medium.
  • the processor described in the embodiment of the present invention may be an application processor (AP), a central processing unit (CPU), a digital signal processor (DSP), or a programmable gate.
  • AP application processor
  • CPU central processing unit
  • DSP digital signal processor
  • programmable gate Electronic components with data processing functions such as an FPGA (Field Programmable Gate Array).

Abstract

本发明公开了一种基于竟争的资源选择方法及装置，所述方法包括：在第n+1时域单元内接收第一侦听结果；所述第一侦听结果至少包括第n时域单元内的信道占用信息和/或碰撞信息；依据所述第一侦听结果选择数据发送的时频资源；其中，所述n为0或正整数。本发明还同时公开了一种计算机存储介质。

Description

基于竞争的资源选择方法、装置和计算机存储介质 技术领域
本发明涉及通信领域资源选择技术，尤其涉及一种基于竞争的资源选择方法、装置和计算机存储介质。
背景技术
在无线通信领域，通常存在着不同的设备基于竞争机制的时频资源占用，这种竞争机制的时频资源占用不可避免的将导致资源占用冲突。具体的如半双工的通信设备中，设备在发送数据前将会先对各信道的占用状况进行侦听，根据侦听结果确定发送数据的信道和时间。先侦听在一定程度上缓解了多个设备同一时间占用同一信道发送数据的资源竞争矛盾，但是在使用过程中发现，设备之间的竞争冲突依然很激烈，时常出现资源占用碰撞现象，导致信息无法及时正常发送。
发明内容
有鉴于此，本发明实施例期待提供一种基于竞争的资源选择方法、装置和计算机存储介质，以减少资源占用碰撞及重发现象。
为达到上述目的，本发明实施例的技术方案是这样实现的：
本发明第一方面提供一种基于竞争的资源选择方法，所述方法包括：
在第n+1时域单元内接收第一侦听结果；所述第一侦听结果至少包括第n时域单元内的信道占用信息和/或碰撞信息；
依据所述第一侦听结果选择数据发送的时频资源；
其中，所述n为0或正整数。
优选地，所述方法还包括：
侦听获得第二侦听结果；所述第二侦听结果至少包括第n+1时域单元内的信道占用信息和/或碰撞信息；
所述依据所述第一侦听结果选择数据发送的时频资源为：
依据所述第一侦听结果及所述第二侦听结果选择发送数据的时频资源。
优选地，所述方法还包括：
利用所述时频资源发送数据；
其中，所述数据包括所述第二侦听结果。
优选地，
在所述第n+1时域单元内接收第一侦听结果包括：
在所述第n+1时域单元内接收资源配置信息和控制信息；
从所述资源配置信息和所述控制信息中提取所述第一侦听结果。
优选地，
所述依据所述第一侦听结果或所述第一侦听结果及所述第二侦听结果选择数据发送的时频资源包括：
依据所述第一侦听结果或第一侦听结果及所述第二侦听结果，预测所述第n+1时域单元以后的时域单元内的空余信道；
在所述空余信道中选择一个信道用于数据发送。
优选地，
所述在所述空余信道中选择一个信道用于数据发送包括：
依据终端属性信息和/或通信属性信息形成选择序列；
依据所述选择序列从所述空余信道中选择一个信道用于数据发送。
优选地，
所述终端属性信息包括：终端的IMEI及终端的IMSI；
所述通信属性信息包括：Tx-UE ID、Rx-UE ID、group ID、终端开机 形成的子帧号或随机形成的随机序列。
优选地，所述依据所述选择序列从所述空余信道中选择一个信道用于数据发送包括：
依据所述选择序列和所述空余信道，进行取模预算获得取模余值；
根据所述取模余值与空余信道的映射关系选择用于数据发送的空余信道。
优选地，
所述第一侦听结果及所述第二侦听结果选择数据发送的时频资源包括：
当所述第一侦听结果或所述第二侦听结果中的碰撞信息表明发生资源占用碰撞时，则根据所述退避策略、所述第一侦听结果及所述第二侦听结果选择数据发送的时频资源。
优选地，
所述依据所述退避策略、所述第一侦听结果及所述第二侦听结果选择数据发送的时频资源包括：
根据发生资源占用碰撞的频域资源序号，确定时域优选级；
依据所述时域优选级及时域退避窗口的大小，确定各数据发送的时域资源；
和/或
依据发送资源占用碰撞的时域资源的先后，确定频域优选级；
依据所述频域优选级及频域退避窗口的大小，确定各数据发送的频域资源。
本发明实施例第二方面提供一种基于竞争的资源选择方法，所述方法包括：
依据重发数据前一次占用的频域资源序号，确定各重发数据的时域优 先级；
依据所述时域优先级级时域退避窗口的大小，确定发送各重发数据发送的时域资源；
或
依据重发数据前一次占用的时域资源的先后，确定各重发数据的频域优先级；
依据所述频域优选级及频域退避窗口的大小，确定发送各重发数据的频域资源。
本发明实施例第三方面提供一种基于竞争的资源选择方法，所述方法包括：
确定空余信道；
获取选择序列；
依据所述选择序列，选择空余信道。
优选地，所述方法包括：
所述获取选择序列为：依据终端属性信息和/或通信属性信息形成选择序列。
优选地，
所述终端属性信息包括：终端的IMEI及终端的IMSI；
所述通信属性信息包括：Tx-UE ID、Rx-UE ID、group ID、终端开机形成的子帧号或随机形成的随机序列。
优选地，所述依据所述选择序列，选择空余信道包括：
依据所述选择序列和所述空余信道，进行取模预算获得取模余值；
根据所述取模余值与空余信道的映射关系选择用于数据发送的空余信道。
本发明实施例第四方面提供一种基于竞争的资源选择装置，所述装置 包括：
接收单元，配置为在第n+1时域单元内接收第一侦听结果；所述第一侦听结果至少包括第n时域单元内的信道占用信息和/或碰撞信息；
选择单元，配置为依据所述第一侦听结果选择数据发送的时频资源；
其中，所述n为0或正整数。
优选地，所述装置还包括：
侦听单元，配置为侦听获得第二侦听结果；所述第二侦听结果至少包括第n+1时域单元内的信道占用信息和/或碰撞信息；
所述选择单元，具体配置为依据所述第一侦听结果及所述第二侦听结果选择发送数据的时频资源。
优选地，所述装置还包括：
发送单元，配置为利用所述时频资源发送数据；
其中，所述数据包括所述第二侦听结果。
优选地，
所述接收单元，配置为在所述第n+1时域单元内接收资源配置信息或控制信息；从所述资源配置信息或所述控制信息中提取所述第一侦听结果。
优选地，
所述选择单元，配置为依据所述第一侦听结果或第一侦听结果及所述第二侦听结果，预测所述第n+1时域单元以后的时域单元内的空余信道；在所述空余信道中选择一个信道配置为数据发送。
优选地，
所述选择单元，配置为依据终端属性信息和/或通信属性信息形成选择序列；
依据所述选择序列从所述空余信道中选择一个信道配置为数据发送。
优选地，
所述终端属性信息包括：终端的IMEI及终端的IMSI；
所述通信属性信息包括：Tx-UE ID、Rx-UE ID、group ID、终端开机形成的子帧号或随机形成的随机序列。
优选地，所述选择单元包括：
计算模块，配置为依据所述选择序列和所述空余信道，进行取模预算获得取模余值
选择模块，配置为根据所述取模余值与空余信道的映射关系选择配置为数据发送的空余信道。
优选地，
所述选择单元，配置为当所述第一侦听结果或所述第二侦听结果中的碰撞信息表明发生资源占用碰撞时，则根据所述退避策略、所述第一侦听结果及所述第二侦听结果选择数据发送的时频资源。
优选地，
所述选择单元，配置为根据发生资源占用碰撞的频域资源序号，确定时域优选级；及依据所述时域优选级及时域退避窗口的大小，确定各数据发送的时域资源；
和/或
依据发送资源占用碰撞的时域资源的先后，确定频域优选级；
依据所述频域优选级及频域退避窗口的大小，确定各数据发送的频域资源。
本发明实施例第五方面提供一种基于竞争的资源选择装置，所述装置包括：
第一确定单元，配置为依据重发数据前一次占用的频域资源序号，确定各重发数据的时域优先级；或依据重发数据前一次占用的时域资源的先后，确定各重发数据的频域优先级；
第二确定单元，配置为依据所述时域优先级级时域退避窗口的大小，确定发送各重发数据发送的时域资源；或依据所述频域优选级及频域退避窗口的大小，确定发送各重发数据的频域资源。
本发明实施例第六方面提供一种基于竞争的资源选择装置，所述装置包括：
第三确定单元，配置为确定空余信道；
获取单元，配置为获取选择序列；
第四确定单元，配置为依据所述选择序列，选择空余信道。
优选地，
所述获取单元，配置为依据终端属性信息和/或通信属性信息形成选择序列。
优选地，
所述终端属性信息包括：终端的IMEI及终端的IMSI；
所述通信属性信息包括：Tx-UE ID、Rx-UE ID、group ID、终端开机形成的子帧号或随机形成的随机序列。
优选地，所述第四确定单元，配置为依据所述选择序列和所述空余信道，进行取模预算获得取模余值；及根据所述取模余值与空余信道的映射关系选择配置为数据发送的空余信道。
本发明实施例第七方面提供一种计算机存储介质，所述计算机存储介质中存储有计算机可执行指令，所述计算机可执行指令用于执行本发明实施例第一方面至第三方面所述方法的至少其中之一。本发明实施例所述的基于竞争的资源选择方法、装置和计算机存储介质，终端在发送数据之前接收其他设备发送的包括占用状况信息和/或碰撞信息的第一侦听结果，一方面终端将根据第一侦听结果获得后续时间内各信道的碰撞状况，从而能降低与其他终端的发送资源选择冲突的几率，有利于数据的及时和正常发 送；另一方面终端由于接收其他终端发送的侦听结果，可以适当的减少自行侦听时域单元个数，从而能降低功耗。
附图说明
图1为本发明实施例所述的基于竞争的资源选择方法的流程示意图；
图2(a)本发明实施例所述的为SA调度周期的示意图之一；
图2(b)本发明实施例所述的为SA调度周期的示意图之一；
图3为基于本发明实施例所述方法的时频资源选择示意图之一；
图4为基于本发明实施例所述方法的时频资源选择示意图之二；
图5为基于本发明实施例所述方法的时频资源选择示意图之三；
图6(a)为基于本发明实施例所述方法的时频资源选择示意图之三；
图6(b)为基于本发明实施例所述方法的时频资源选择示意图之四；
图7为本发明实施例所述的基于竞争的资源选择装置的结构示意图。
具体实施方式
以下结合附图对本发明的优选实施例进行详细说明，应当理解，以下所说明的优选实施例仅用于说明和解释本发明，并不用于限定本发明。
实施例一：
如图1所示，本实施例提供一种基于竞争的资源选择方法，所述方法包括：
步骤S110：在第n+1时域单元内接收第一侦听结果；所述第一侦听结果至少包括第n时域单元内的信道占用信息和/或碰撞信息；
步骤S120：依据所述第一侦听结果选择发送数据的时频资源；
其中，所述n为0或正整数。
通常在先侦听后发送的半双工通信过程中，终端在发送数据前会进行侦听；譬如需要在第3时域单元内发送数据，终端A将侦听第2时域单元 内的各信道的占用信息和/或碰撞信息；从而预测出第3时域单元内其他终端对各信道的竞争状况，终端A将根据预测结果尽可能的避开竞争选择一个信道来发送数据。
但是在上述场景中，终端A仅对侦听第2时域单元进行了侦听，然而在第1时域单元发生了碰撞现象，发送碰撞的两终端需要发送的数据可能需要在第3时域单元内重发；或者终端B已经在第1时域单元占用了信道A，终端B将在一定周期内的每个1个时域单元均占用信道A发送数据直到数据包发送完成；则此时仅侦听第二时域单元，显然终端A可能认为信道A在第3时域单元时空余信道；从而终端A将竞争信道A；导致终端A及终端B都竞争信道A从而发生资源占用碰撞现象，导致终端A及终端B需要发送的数据都不能及时的发送。
如果B,C都在在第一单元发送，彼此不能互听，B,C将在第二单元选择听也可以获知其在第一时间单元是否碰撞或同一时刻有其它用户发送，从而根据退避原则在调度窗内选择重发。
利用本实施例所述基于竞争的资源选择方法，则终端A将在第2时域单元内接收其他终端发送的第1时域单元内的第一侦听结果；从而终端2将获知第1时域单元的第一侦听结果，并根据第一侦听结果选择发送数据的时频资源。当根据第一侦听结果发现第3时域单元的各信道都可能出现很强的竞争时，可以根据退避策略进行时域退避；还可以根据第一侦听结果预测出第3时域单元内哪些信道的竞争激烈，选择竞争较小的信道作为数据发送的频域资源。
综合上述本实施例所述的方法，在发送数据之前的第n+1时域单元内还接收其他终端发送的至少包括第n时域单元的信道占用信息及碰撞信息至少其中之一的第一侦听结果；所述第n+1时域单元优选为终端开始侦听的时域单元；从而使得终端可以获取更多的信道占用信息及碰撞信息，从 而获得更加准确的预测结果，从而能更加合理的选择发送数据的资源，具有减少了碰撞频率，减少了数据重发次数及提高了数据发送的及时性等优点。
在一些实施例中，所述方法还包括：
侦听获得第二侦听结果；所述第二侦听结果至少包括第n+1时域单元内的信道占用信息和/或碰撞信息；
所述依据所述第一侦听结果选择发送数据的时频资源为：
依据所述第一侦听结果及所述第二侦听结果选择发送数据的时频资源。
终端将在第n+1时域单元对各信道进行侦听，形成第二侦听结果；
从而在步骤S120中，将同时根据第一侦听结果和第二侦听结果来确定发送数据的时频资源。
所述第一侦听结果和所述第二侦听结果均可包括所侦听时域单元的信道占用信息以及碰撞信息。所述信道占用信息及所述碰撞信息均可以用比特位图来表示；具体的如图2中所示的SA域；所述SA域内共有N个信道；则针对每一个信道可用1比特表示该信道是否被占用的两种状态，则N个信道需要N个比特。同样的针对每一个信道可选用1个比特来是否出现资源占用碰撞的两种状态。采用上述比特位图的表示第一侦听结果和第二侦听结果，表示简便且清楚明了。一个SA周期包括SA域以及业务区域；每一个SA在频域对应了N个信道。SA域包括的N个SA信道在时域可以为连续或离散分布。在图2(a)中，一个SA周期的SA域在时域上是连续分别的；在图2(b)中，一个SA周期的SA域在时域上是离散分布的。其中UE的SA调度周期起点可以相同，也可以不同，在调度周期内有于SA信息内容变化不大，进行重复发送，在调度周期外可以作为SA新传，SA的重传次数小于SA调度窗口。
在具体的实现过程中，所述第一侦听结果可以仅包括信道占用信息，可仅包括碰撞信息，也可以既包括信道占用信息又包括碰撞信息。
终端根据所述信道占用信息可知道被侦听的时域单元内各信道是否被占用，从而知道哪些信道已经被其他终端预先占用，并根据预先存储的信道占用策略，预测下一时刻哪些信道将竞争较小。
终端根据所述碰撞信息可知道被侦听的时域单元内不同终端竞争同一时频资源导致资源占用碰撞的发生个数，从而确定出是否有终端需要重发数据，并根据数据重发策略，预测出哪些信道将竞争较小。
故根据第一侦听结果和第二侦听结果，有利于终端根据预测结果选择出竞争小的时频资源来发送数据，从而减少终端对同一时频资源的竞争激烈程度，减少重发以及资源占用碰撞现象。
在具体的实现过程中，优选为所述第一侦听结果与所述第二侦听结果至少部分不同，所述第一侦听结果和所述第二侦听结果所侦听的时域单元都可不止一个，可为2个或3个等，具体的个数决定于终端的侦听窗口大小；且进一步的所述第一侦听结果所对应的时域单元至少有一个位于所述第二侦听结果所对应的时域单元之前。所述时域单元具体可为一个或多个子帧、一个或多个时隙、或一个或多个微帧等时间段。
所述方法还包括在选择数据发送的时频资源后，还包括利用所述步骤S120中所选择的时频资源发送数据；且所述数据中包括所述第二侦听结果。通常所述数据为资源配置信息或控制信息，将所述第二侦听结果携带在所述资源配置信息或控制信息发送，方便后续其他终端获取所述第二侦听结果，选择信道或时域单元。
在某些实施例中，所述步骤S110包括：
在所述第n+1时域单元内接收资源配置信息或控制信息；
从所述资源配置信息或所述控制信息中提取所述第一侦听结果。
本实施例所述的基于竞争的资源选择方法，适用于D2D(Device to Device)的通信场景中，SA(Scheduling Assignment)域内对SA域资源的选择调度。
故所述步骤S110可为，预选择时频资源的发送数据的终端，自己本身在侦听时域单元内信道占用状况和/或碰撞信息时，还接收其他终端发送的第一侦听结果；在本实施例中所述第一侦听结果是携带在资源配置信息或控制信息一起发送的；故需要从资源配置信息或控制信息提取第一侦听结果。将所数第一侦听结果携带在所述资源配置信息或控制信息中一起发送和接收，这样避免了另外开辟专用的时频资源来发送第一侦听结果，与现有技术兼容性大，实现较为简便。
如图3所示为一个SA域的时频资源的示意图，Fx表示的为频域资源的第x个信道，所述x为时域资源的标号，具体取值为0至5的整数；具体如第0信道F0及第1信道F1等；Ty表示的为时域资源的第y个时域单元，所述y为频域资源的标号，具体取值0至5的整数；具体如第0个时域单元T0及第1时域单元T1等。在具体的实现过程中SA域的时频资源可以如图2所示的连续分布的时频资源，还可以是在频域和/或时域上离散分布的时频资源。
在时域单元T0内不发送数据的终端UE3、终端UE4及终端UE5可侦听T0，形成第一侦听结果；所述第一侦听结果为终端UE1及终端UE2分别占用了F0及F2发送数据，且在T0没有发生碰撞现象。
为了节省各终端的功耗，也可以仅使预备发送数据的终端UE3侦听T0，形成第一侦听结果。
在时域单元T1内，UE3发送数据，此时UE3将第一侦听结果一起广播或组播发送；于此同时至少预备发送数据的终端UE1、终端UE4及终端UE5自身将侦听T1，形成第二侦听结果；并接收UE3发送的第一侦听结果； 从而UE1、UE4及UE5将根据第一侦听结果和第二侦听结果确定选择时域单元内T2内的信道。
此外，所述依据所述第一侦听结果或所述第一侦听结果及所述第二侦听结果选择发送数据的时频资源包括：
依据所述第一侦听结果或第一侦听结果及所述第二侦听结果，预测所述第n+1时域单元以后的时域单元内的空余信道；
在所述空余信道中选择一个信道用于数据发送。
根据第一侦听结果及第二侦听结果可以预测在下一时域单元或指定的时域单元内哪些信道竞争将较小；这些竞争较小的信道即为所述空余信道。在具体的实现过程中，根据第一侦听结果和第二侦听结果，获得空余信道。所谓空余信道即通过对SA每个信道进行解码，获得解码正确的信道为信道占用，获得解码错误的信道为信道碰撞或信道质量较差，没有获得信息的信道为空余信道。终端优选选择空余信道作为数据发送的时频资源，有利于缓解终端之间对同一时频资源的竞争，避免过多的碰撞现象，减少数据重发，提升数据发送的及时性。
具体如图3中，终端UE4和UE5根据第一侦听结果知道F0之前被终端UE1占用过，根据终端在某一时刻占用一信道后将该时刻以后的时间内优先占用同一信道，故终端UE4和UE5预测出F0可能被UE1再次占用竞争较为激烈，将优选选择信道F1至F5中的信道。所述F1至所述F5即为所述空余信道。
当所述空余信道有多个时，终端将如何选择空余信道，以避免随机选择与其他终端再次发送碰撞现象，本实施例做出了进一步的改进，具体如下：
所述在所述空余信道中选择一个信道用于数据发送包括：
依据终端属性信息和/或通信属性信息形成选择序列；
依据所述选择序列从所述空余信道中选择一个信道用于数据发送。
不同的终端属性信息不同，不同终端进行通信的通信属性信息也不同，故为了避免多个终端都采用随机选择空余信道的方式，导致资源占用碰撞，在本实施例中根据终端属性信息和通信属性信息中的至少一个来确定数据发送的时频资源，再次缓解了不同终端之间对同一资源的竞争，有利于碰撞及重发现象的减少。
具体地，所述终端属性信息包括：终端的国际移动电话设备识别码(International Mobile Equipment Identity，IMEI)及终端的国际移动用户识别码(International Mobile Subscriber Identity，IMSI)的其中之一；
所述通信属性信息包括：Tx-UE ID(Transmit terminal identity)发送端身份识别号、Rx-UE ID(receive terminal identity)接收端身份识别号、群组身份识别号；group ID(在D2D通信中，根据应用不同可以分为多个不同的群组，如消防组，医疗组，等，是应用层下发的信息识别号，也可能是预定义的组ID号)、终端开机形成的子帧号或随机形成的随机序列。
所述依据所述选择序列从所述空余信道中选择一个信道用于数据发送的方法有多种，具体如可以将所述选择序列转换为表征大小的数值，再对数值进行排序，根据排序结果来选择空余信道。具体的如排序结果越小则选择的空余信道的序号也越小；或排序结果越小则选择的空余信道的序号越大。具体的如何进行排序结果与空余信道之间的映射可以是事先约定的。
以下提供一种优选方式，具体为所述依据所述选择序列从所述空余信道中选择一个信道用于数据发送包括：
依据所述选择序列和所述空余信道，进行取模预算获得取模余值；
根据所述取模余值与空余信道的映射关系选择用于数据发送的空余信道。
以下提供一个空余信道选择的具体示例：
步骤A：假设终端IMEI为M，将所述M为所述选择序列；
步骤B：将P个空余信道进行一维排序；每一个空余信道对应一个一维序号；
步骤C：根据以下公式对所述M与所述P进行运算；
1)求整数商：c＝M/P
2)求余数：index＝M-c*P
步骤D：根据所述index与空余信道的对应关系，选取一个空余信道用于数据发送。
在具体的实现过程中，如何获知所述空余信道总数，可以通过对所空余信道进行计数获取，还可以通过将所述空余信道重新排序获取。
所述步骤A和步骤B没有一定的先后顺序，可以同时执行也可以先后执行。
在具体的实现过程中，空余信道所对应的参数包括频域的信道，还包括时域的时域单元。针对同一信道，同样可以依据所述选择序列选择其时域单元，从而实现空余信道的选择，具体如下：
步骤A1：假设终端IMEI为M，将所述M为所述选择序列；
步骤B1：将P个空余信道进行排序，分别在时域和频域进行排序；若P个信道对应的时域总数p1；对应的频域内信道总数为S；
步骤C1：根据以下公式对所述M与所述P进行运算；
1)求整数商：c＝M/p1；d＝M/S；
2)求余数：index1＝M-c*p1；index2＝M-d*S
步骤D1：根据所述index1及所述index2与空余信道的对应关系，选取一个空余信道用于数据发送。
所述取模余值与空余信道的映射关系是预先知道的，如空余信道进行了重新排序，则其重新排序后的一维序号可用于指示所述空余信道。若此 时取模余值为3则可对应为重新排序后序号为3的空余信道。采用根据取模余值与空余信道的映射关系确定选择空余信道，相对于随机选择空余信道中的一个，再次降低了不同终端对同一时频资源的竞争激烈程度。
具体的如何选择空余信道以及如何根据选择序列选择空余信道的方式还有很多，在此就不再一一赘述了。
在本实施例中，所述第一侦听结果及所述第二侦听结果选择发送数据的时频资源包括：
当所述第一侦听结果或所述第二侦听结果中的碰撞信息表明发生资源占用碰撞时，则根据所述退避策略、所述第一侦听结果及所述第二侦听结果选择数据发送的时频资源。
所述退避策略包括时域退避策略和频域退避策略中的至少一个；所述时域退避策略为选择的频域信道不变的情况下，延迟数据发送的时域单元；所述频域退避策略为在时域单元不变的情况下，选择其他信道发送数据。
在本实施例中所述退避策略根据当前资源竞争状况，选择时域退避策略及频域退避策略的至少其中之一。当资源占用碰撞后，若下一个时域单元内空余信道较多，此时可优选频域退避策略；若下一个时域单元内空余信道较少，优选时域退避策略。在具体的实现过程中，还可以时域退避策略和频域退避策略交叉使用。
以下提供一种具体根据所述退避策略、所述第一侦听结果及所述第二侦听结果选择时频资源进行重发的方法，具体如下：
所述依据所述退避策略、所述第一侦听结果及所述第二侦听结果选择数据发送的时频资源包括：
根据发生资源占用碰撞的频域资源序号，确定时域优选级；
依据所述时域优选级及时域退避窗口的大小，确定各重发数据的发送的时域资源；
和/或
依据发送资源占用碰撞的时域资源的先后，确定频域优选级；
依据所述频域优选级及频域退避窗口的大小，确定各重发数据的发送的频域资源。
上述退避策略尤其适用于根据第一侦听结果及第二侦听结果发现发生两个或两个以上的时频资源的资源占用碰撞时。
在具体的实现过程中，退避策略通常用于数据重发的时频资源的选择；若终端1发送的数据1在第一次发送发生了资源占用碰撞，导致发送数据失败，得重发数据，此时终端1将根据第一和/或第二侦听结果中的碰撞信息确定需要重发，将依据退避策略及侦听结果确定数据重发。
而终端1以外的其他终端，将依据退避策略及第一和/或第二侦听结果，预测出终端1将在哪个时频资源发送数据，来确定自己发送数据的时频资源。
如图3所示，在第2时域单元T2内，UE4和UE5竞争同一信道F3导致资源占用碰撞现象；此时不发送数据的终端UE2和UE3侦听可形成第一侦听结果；出于终端功耗节省的目的，对D2D发送/接收感兴趣的设备将在T3单元监听，如UE2
故在第3时域单元UE2发送数据时，还将发送所述第一侦听结果；所述第一侦听结果中包括表征所述UE4和UE5之间发送了资源占用碰撞现象的碰撞信息。预备发送数据UE4和UE5此时侦听T3，形成第二侦听结果。
UE4将根据第一侦听结果获知在T2内发送的数据未发送成功，需要重选发送，若此时UE4预先存储的退避策略为时域退避策略；且所述时域退避策略的退避窗口大小为0；则UE4将会在时域单元T4的第3信道F3上重发数据。
UE5将根据第一侦听结果获知在T2内发送的数据未发送成功，需要重 选发送，若此时UE5预先存储的退避策略为时域退避策略；且所述时域退避策略的退避窗口大小为1；则UE5将会在时域单元T5的第3信道F3上重发数据。
如图4所示，在时域单元T0上，UE1和UE5发生资源占用碰撞；UE2在T0进行了侦听形成了第一侦听结果，在T1上发送资源配置信息或控制信息时，一并发送所述第一侦听结果，则此时未发送数据的UE1和UE5可以通过接收UE2发送的第一侦听结果获知在T0的F0发生了资源占用碰撞，数据未发送成功；此时UE1和UE5之前预备通过时频资源T0和F0发送的数据需要重发。
此时，UE1和UE5都采用时间退避策略；依据第一侦听结果及时间退避策略，UE1将在T2的F0上重发数据；UE5将依据第一侦听结果及时间退避策略在T3的F0上重发数据。
如图5所示，在时频资源T0，F0上发生了UE1和UE5的资源占用碰撞；此时不发送数据的终端UE2侦听的时域单元T0，形成了第一侦听结果。UE2在T1发送资源配置信息或控制信息时还将同步发送第一侦听结果；不发送数据的UE1、UE3、UE4及UE5接收所述UE2发送的信息，同时还侦听T1。终端UE1通过接收的第一侦听结果发现其在时频资源T0，F0上发送的数据因资源占用碰撞未发送成功，需要重发；则此时UE1优先重发数据，选择时频资源T2，F0发送重发数据。
终端UE5依据第一侦听结果发现在时频资源T0，F0发送的数据未发送成功，则UE5优先重发数据的发送，根据第一侦听结果为了避免再次与UE1发送资源占用碰撞，采用时域退避策略和频域退避策略相结合的方式，选择时频资源T3，F4发送重发数据。
如图6(a)所示，在时频资源T0，F2上发送终端UE1与终端UE5的资源占用碰撞；在时频资源T1，F0上发送终端UE2和终端UE3发送资源 占用碰撞；若此时，所述依据所述退避策略、所述第一侦听结果及所述第二侦听结果选择数据发送的时频资源为：根据发生资源占用碰撞的频域资源序号，确定时域优选级；及依据所述时域优选级及时域退避窗口的大小，确定各重发数据的发送的时域资源；且若频域资源序号越小，则时域优先级越高；则UE2和UE3的时域优先级将高于UE1和UE5的时域优先级，在时域资源不够的时候，即便UE2和UE3的资源占用碰撞先发生也将优先分配给UE2和UE3。具体的分布如图6(a)中所示。假设在T2内仅有一个信道为空余信道、则待分配时频资源的UE1、UE2、UE3及UE5；由于UE2和UE3的时域优先级高，则此时该空余信道优先分配给UE2和UE3，若此时UE2的时域退避窗口为0；UE3的时域退避窗口为1。则T2中的空余信道分配给UE2。
如图6(a)所示，在时频资源T0，F2上发送终端UE1与终端UE5的资源占用碰撞；在时频资源T1，F0上发送终端UE2和终端UE3发送资源占用碰撞；若此时，所述依据所述退避策略、所述第一侦听结果及所述第二侦听结果选择数据发送的时频资源为：依据发送资源占用碰撞的时域资源的先后，确定频域优选级；依据所述频域优选级及频域退避窗口的大小，确定各重发数据的发送的频域资源；且时域单元所对应的时间越靠前则频域优先级则越大，则UE2和UE3的频域优先级将低于UE1和UE5的频域优先级，在频域资源不够的时候，优先分配给UE1和UE5；如图6(b)中优先分配给UE1。
在具体的实现过程中，可能会出现在一个时域单元内没有终端设备发送资源配置信息和控制信息，则此时在进行侦听的终端可能接收不到第一侦听结果，则终端依然可以根据本实施例所述的退避原则以及空余信道选择方法，来选择发送数据的时频资源。在本发明实施例中，所述数据发送包括数据重发、新发以及再发。
综合上述，本实施例提供了一种基于竞争的资源选择方法，一方面终端不仅自行侦听时域单元的信道占用信息和/或碰撞信息，还接收其他终端发送的侦听结果，从而可以获得更多的信道占用信息和/或碰撞信息，从而能准确的预测出哪些信道时空余信息，从而减少资源占用碰撞现象的发生；另一方面通过接收其他终端发送的侦听结果，可以减少终端本身侦听时域单元数，从而能降低功耗。
实施例二：
本实施例提供一种基于竞争的资源选择方法，所述方法包括：
依据重发数据前一次占用的频域资源序号，确定各重发数据的时域优先级；
依据所述时域优先级级时域退避窗口的大小，确定发送各重发数据发送的时域资源；
或
依据重发数据前一次占用的时域资源的先后，确定各重发数据的频域优先级；依据所述频域优选级及频域退避窗口的大小，确定发送各重发数据的频域资源。
本实施例所述的方法，可以适用于数据的重发，具体包括发送终端通过本身的侦听结果或其他终端的侦听结果知道前一发送数据时，发生资源占用碰撞时的数据重发的时频资源选择；同时也可以利用终端没有获得侦听结果，自动数据重发。在本实施例中数据重发时，不再是根据随机的选择时频资源来发送数据，而是先确定时域或频域的优先级，依据确定的优选级来确定时频资源，相较于随机选择，显然能降低不同终端对同一资源占用的竞争几率。
在本实施例具体如何退避可以参见实施例一中相应的部分。
实施例三：
本实施例提供一种基于竞争的资源选择方法，所述方法包括：
步骤一：确定空余信道；
步骤二：获取选择序列；
步骤三：依据所述选择序列，选择空余信道。
所述步骤一中确定空余信道，可以依据侦听结果来确定；所述侦听结果可以是终端自行侦听的，也可是从其他终端处接收的；还可以是同时包括从其他终端处接收及自行侦听的。
在本实施例中改变了现有方法中在确定了空余信道后，随机选择一个信道来发送数据的方法，选择首先获取选择序列，依据选择序列来确定发送数据的空余信道，不同的终端的获得的选择序列不同，则不同的终端将占用不同的空余信息，这样就降低了终端对同一时频资源的竞争激烈程度，从而能减少碰撞以及重发现象。
在一些实施例中，所述获取选择序列为：依据终端属性信息和/或通信属性信息形成选择序列。其中，所述终端属性信息包括：终端的IMEI及终端的IMSI；所述通信属性信息包括：Tx-UE ID、Rx-UE ID、group ID、终端开机形成的子帧号或随机形成的随机序列。
具体的如何依据选择序列来确定发送数据的空余资源，有很多种方法，以下提供一种优选方法：具体如下：
所述依据所述选择序列，选择空余信道包括：
依据所述选择序列和所述空余信道，进行取模预算获得取模余值；
根据所述取模余值与空余信道的映射关系选择用于数据发送的空余信道。
具体如何取模可参见实施例一中对应的部分。
综合上述，本方法提供了一种如何从多个空余信道中选择一个空余信道发送数据，改变了过去从多个空余信道中随机选择一个导致的不同终端 对同一空余信道竞争发生碰撞几率高的现象。
实施例四：
如图7所示，本实施例提供一种基于竞争的资源选择装置，所述装置包括：
接收单元110，配置为在第n+1时域单元内接收第一侦听结果；所述第一侦听结果至少包括第n时域单元内的信道占用信息和/或碰撞信息；
选择单元120，配置为依据所述第一侦听结果选择数据发送的时频资源；
其中，所述n为0或正整数。
所述接收单元110的具体结构可为接收接口，如接收天线或接收天线阵列等。
所述选择单元120的具体结构可为处理器及存储介质；所述存储介质上存储有可执行指令；所述处理器执行所述可执行指令可依据所述第一侦听结果选择出发送数据的时频资源。所述存储介质优选为非瞬间存储介质，如ROM。所述处理器可为中央处理器、微处理器、数字信号处理器或可编程逻辑阵列等具有处理功能的电子元器件。
在一些实施例中，所述装置还包括：
侦听单元，配置为侦听获得第二侦听结果；所述第二侦听结果至少包括第n+1时域单元内的信道占用信息和/或碰撞信息及业务数据的资源分配及控制信息；
所述选择单元120，配置为依据所述第一侦听结果及所述第二侦听结果选择发送数据的时频资源。
所述侦听单元，D2D发送/接收感兴趣的设备，将在侦听单元监听SA域信道。
在侦听时域单元内将侦听每一信道，根据从没有信道获得的信息判断出该信道是否被占用以及该信道是否发送了资源占用碰撞。具体如何判断 是否发生碰撞可通过解码侦听过程中所获得的资源配置信息来判断，若解码错误即可能发生了资源占用碰撞；通过资源配置信息的解码结果来判断该信道是否北占用。所述侦听单元的具体结构可包括接收接口以及与所述接收接口相连的解码器等结构。
在某些实施例中所述装置还包括：
发送单元，配置为利用所述时频资源发送数据；
其中，所述数据包括所述第二侦听结果。
所述发送单元的具体结构可包括发送天线等通信接口。所述第二侦听结果优选为携带在资源配置信息或控制信息中发送，这样能不再次分配专门发送第二侦听结果的时频资源，从而实现简便。
在本实施例中，所述接收单元，还配置为在所述第n+1时域单元内接收资源配置信息或控制信息；从所述资源配置信息或所述控制信息中提取所述第一侦听结果。
本实施例所述的装置在接收资源配置信息或控制信息的同时，接收了所述第一侦听结果，相对于终端分别接收资源配置信息或控制信息与第一侦听结果，降低了功耗，且实现简便。
在一些例子中，所述选择单元120，配置为依据所述第一侦听结果或第一侦听结果及所述第二侦听结果，预测所述第n+1时域单元以后的时域单元内的空余信道；在所述空余信道中选择一个信道用于数据发送。
所述选择单元120，配置为依据终端属性信息和/或通信属性信息形成选择序列；及依据所述选择序列从所述空余信道中选择一个信道用于数据发送。
其中，所述终端属性信息包括：终端的IMEI及终端的IMSI；所述通信属性信息包括：Tx-UE ID、Rx-UE ID、group ID、终端开机形成的子帧号或随机形成的随机序列。
此外，所述选择单元120包括：
计算模块，配置为依据所述选择序列和所述空余信道，进行取模预算获得取模余值；
选择模块，配置为根据所述取模余值与空余信道的映射关系选择用于数据发送的空余信道，重发设备还将根据退避原则进行重发或新发资源选择。
所述计算模块的具体结构可包括计算器或具有计算功能的处理器等电子元器件。所述选择模块可为具有选择功能的处理器。
具体地，所述选择单元120，具体配置为当所述第一侦听结果或所述第二侦听结果中的碰撞信息表明发生资源占用碰撞时，则根据所述退避策略、所述第一侦听结果及所述第二侦听结果选择数据发送的时频资源。
所述选择单元120具体如何根据退避策略、第一侦听结果及第二侦听结果选择发送数据的时频资源，至少包括以下两种方式。
方式一：
所述选择单元，配置为根据发生资源占用碰撞的频域资源序号，确定时域优选级；及依据所述时域优选级及时域退避窗口的大小，确定各数据发送的时域资源；如获知资源占用大于时域退避窗口，将占有资源按时域窗大小分段后，依照时域优先原则。
方式二：
所述选择单元，配置为依据发送资源占用碰撞的时域资源的先后，确定频域优选级；及依据所述频域优选级及频域退避窗口的大小，确定各数据发送的频域资源。
在具体的实现过程中，还可以同时结合使用所述方式一及方式二；具体的如交叉使用方式一及方式二。
综合上述，本实施例所述的装置为实施例一中所述的方法提供了硬件 支撑，可用于实现实施例一中任意的技术方案，同样的具有能减少资源占用碰撞及重发发生的几率；减少数据发送时延等优点。具体的本实施例所述的装置可以为能用于D2D通信的终端，具体的如智能手机以及平板电脑等。
实施例五：
本实施例提供一种基于竞争的资源选择装置，所述装置包括：
第一确定单元，配置为依据重发数据前一次占用的频域资源序号，确定各重发数据的时域优先级；第二确定单元，配置为依据所述时域优先级级时域退避窗口的大小，确定发送各重发数据发送的时域资源；或依据所述频域优选级及频域退避窗口的大小，确定发送各重发数据的频域资源；
或者
第一确定单元，配置为依据重发数据前一次占用的时域资源的先后，确定各重发数据的频域优先级；
第二确定单元，配置为依据所述频域优选级及频域退避窗口的大小，确定发送各重发数据的频域资源。
所述第一确定单元及所述第二确定单元的具体结构可为处理器及存储介质；所述存储介质上存储有可执行指令；所述处理器执行所述可执行指令完成对应的功能。所述存储介质优选为非瞬间存储介质，如ROM。所述处理器可为中央处理器、微处理器、数字信号处理器或可编程逻辑阵列等具有处理功能的电子元器件。所述第一确定单元和第二确定单元可分别对应不同的处理器，亦可以集成对应于同一处理器，当对应于同一处理器时采用时分复用或不同线程实现分别实现第一确定单元和第二确定单元的功能。
综合上述，本实施例为实施例二中所述的方法提供了硬件支撑，可用于实现实施例二中任意的技术方案，具体的本实施例所述的装置可以为能 用于D2D通信的终端，具体的如智能手机以及平板电脑等。
实施例六：
本实施例提供一种基于竞争的资源选择装置，所述装置包括：
第三确定单元，配置为确定空余信道；
获取单元，配置为获取选择序列；
第四确定单元，配置为依据所述选择序列，选择空余信道。
所述第三确定单元、获取单元及所述第四确定单元的具体结构可为处理器及存储介质；所述存储介质上存储有可执行指令；所述处理器执行所述可执行指令完成对应的功能。所述存储介质优选为非瞬间存储介质，如ROM。所述处理器可为中央处理器、微处理器、数字信号处理器或可编程逻辑阵列等具有处理功能的电子元器件。所述第三确定单元、获取单元和第二确定单元可分别对应不同的处理器，亦可以集成对应于同一处理器，当对应于同一处理器时采用时分复用或不同线程实现分别实现第一确定单元和第二确定单元的功能。
在一些例子中，所述获取单元，配置为依据终端属性信息和/或通信属性信息形成选择序列。其中，所述终端属性信息包括：终端的IMEI及终端的IMSI；所述通信属性信息包括：Tx-UE ID、Rx-UE ID、group ID、终端开机形成的子帧号或随机形成的随机序列。
此外，所述第四确定单元，配置为依据所述选择序列和所述空余信道，进行取模预算获得取模余值；及根据所述取模余值与空余信道的映射关系选择用于数据发送的空余信道。
综合上述，本实施例为实施例三中所述的方法提供了硬件支撑，可用于实现实施例三中任意的技术方案，具体的本实施例所述的装置可以为能用于D2D通信的终端，具体的如智能手机以及平板电脑等。
本发明实施例还记载一种计算机存储介质，所述计算机存储介质中存 储有计算机可执行指令，所述计算机可执行指令用于本发明实施例所述方法的至少其中之一；如图1所示的方法。
所述计算机存储介质可包括只读存储器(ROM，Read-Only Memory)、随机存取存储器(RAM，Random Access Memory)、磁碟或者光盘等各种可以存储程序代码的介质；优选为非瞬间存储介质。
本发明实施例中所述的处理器，可为应用处理器AP(AP，Application Processor)、中央处理器(CPU，Central Processing Unit)、数字信号处理器(DSP，Digital Signal Processor)或可编程门阵列(FPGA，Field Programmable Gate Array)等具有数据处理功能的电子元器件。
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。凡按照本发明原理所作的修改，都应当理解为落入本发明的保护范围。

Claims (31)

  1. 一种基于竞争的资源选择方法，所述方法包括：
    在第n+1时域单元内接收第一侦听结果；所述第一侦听结果至少包括第n时域单元内的信道占用信息和/或碰撞信息；
    依据所述第一侦听结果选择数据发送的时频资源；
    其中，所述n为0或正整数。
  2. 根据权利要求1所述的方法，其中，所述方法还包括：
    侦听获得第二侦听结果；所述第二侦听结果至少包括第n+1时域单元内的信道占用信息和/或碰撞信息；
    所述依据所述第一侦听结果选择数据发送的时频资源为：
    依据所述第一侦听结果及所述第二侦听结果选择发送数据的时频资源。
  3. 根据权利要求2所述的方法，其中，所述方法还包括：
    利用所述时频资源发送数据；
    其中，所述数据包括所述第二侦听结果。
  4. 根据权利要求1、2或3所述的方法，其中，
    在所述第n+1时域单元内接收第一侦听结果包括：
    在所述第n+1时域单元内接收资源配置信息和控制信息；
    从所述资源配置信息和所述控制信息中提取所述第一侦听结果。
  5. 根据权利要求2或3所述的方法，其中，
    所述依据所述第一侦听结果或所述第一侦听结果及所述第二侦听结果选择数据发送的时频资源包括：
    依据所述第一侦听结果或第一侦听结果及所述第二侦听结果，预测所述第n+1时域单元以后的时域单元内的空余信道；
    在所述空余信道中选择一个信道用于数据发送。
  6. 根据权利要求5所述的方法，其中，
    所述在所述空余信道中选择一个信道用于数据发送包括：
    依据终端属性信息和/或通信属性信息形成选择序列；
    依据所述选择序列从所述空余信道中选择一个信道用于数据发送。
  7. 根据权利要求6所述的方法，其中，
    所述终端属性信息包括：终端的IMEI及终端的IMSI；
    所述通信属性信息包括：Tx-UE ID、Rx-UE ID、group ID、终端开机形成的子帧号或随机形成的随机序列。
  8. 根据权利要求6所述的方法，其中，所述依据所述选择序列从所述空余信道中选择一个信道用于数据发送包括：
    依据所述选择序列和所述空余信道，进行取模预算获得取模余值；
    根据所述取模余值与空余信道的映射关系选择用于数据发送的空余信道。
  9. 根据权利要1、2或3所述的方法，其中，
    所述第一侦听结果及所述第二侦听结果选择数据发送的时频资源包括：
    当所述第一侦听结果或所述第二侦听结果中的碰撞信息表明发生资源占用碰撞时，则根据所述退避策略、所述第一侦听结果及所述第二侦听结果选择数据发送的时频资源。
  10. 根据权利要求9所述的方法，其中，
    所述依据所述退避策略、所述第一侦听结果及所述第二侦听结果选择数据发送的时频资源包括：
    根据发生资源占用碰撞的频域资源序号，确定时域优选级；
    依据所述时域优选级及时域退避窗口的大小，确定各数据发送的时域 资源；
    和/或
    依据发送资源占用碰撞的时域资源的先后，确定频域优选级；
    依据所述频域优选级及频域退避窗口的大小，确定各数据发送的频域资源。
  11. 一种基于竞争的资源选择方法，所述方法包括：
    依据重发数据前一次占用的频域资源序号，确定各重发数据的时域优先级；
    依据所述时域优先级级时域退避窗口的大小，确定发送各重发数据发送的时域资源；
    或
    依据重发数据前一次占用的时域资源的先后，确定各重发数据的频域优先级；
    依据所述频域优选级及频域退避窗口的大小，确定发送各重发数据的频域资源。
  12. 一种基于竞争的资源选择方法，所述方法包括：
    确定空余信道；
    获取选择序列；
    依据所述选择序列，选择空余信道。
  13. 根据权利要求12所述的方法，其中，所述方法包括：
    所述获取选择序列为：依据终端属性信息和/或通信属性信息形成选择序列。
  14. 根据权利要求13所述的方法，其中，
    所述终端属性信息包括：终端的IMEI及终端的IMSI；
    所述通信属性信息包括：Tx-UE ID、Rx-UE ID、group ID、终端开机 形成的子帧号或随机形成的随机序列。
  15. 根据权利要求12、13或14所述的方法，其中，所述依据所述选择序列，选择空余信道包括：
    依据所述选择序列和所述空余信道，进行取模预算获得取模余值；
    根据所述取模余值与空余信道的映射关系选择用于数据发送的空余信道。
  16. 一种基于竞争的资源选择装置，所述装置包括：
    接收单元，配置为在第n+1时域单元内接收第一侦听结果；所述第一侦听结果至少包括第n时域单元内的信道占用信息和/或碰撞信息；
    选择单元，配置为依据所述第一侦听结果选择数据发送的时频资源；
    其中，所述n为0或正整数。
  17. 根据权利要求16所述的装置，其中，所述装置还包括：
    侦听单元，配置为侦听获得第二侦听结果；所述第二侦听结果至少包括第n+1时域单元内的信道占用信息和/或碰撞信息；
    所述选择单元，配置为依据所述第一侦听结果及所述第二侦听结果选择发送数据的时频资源。
  18. 根据权利要求17所述的装置，其中，所述装置还包括：
    发送单元，配置为利用所述时频资源发送数据；
    其中，所述数据包括所述第二侦听结果。
  19. 根据权利要求16、17或18所述的装置，其中，
    所述接收单元，配置为在所述第n+1时域单元内接收资源配置信息或控制信息；从所述资源配置信息或所述控制信息中提取所述第一侦听结果。
  20. 根据权利要求17或18所述的装置，其中，
    所述选择单元，配置为依据所述第一侦听结果或第一侦听结果及所述第二侦听结果，预测所述第n+1时域单元以后的时域单元内的空余信道； 在所述空余信道中选择一个信道配置为数据发送。
  21. 根据权利要求20所述的装置，其中，
    所述选择单元，配置为依据终端属性信息和/或通信属性信息形成选择序列；及依据所述选择序列从所述空余信道中选择一个信道配置为数据发送。
  22. 根据权利要求21所述的装置，其中，
    所述终端属性信息包括：终端的IMEI及终端的IMSI；
    所述通信属性信息包括：Tx-UE ID、Rx-UE ID、group ID、终端开机形成的子帧号或随机形成的随机序列。
  23. 根据权利要求21所述的装置，其中，所述选择单元包括：
    计算模块，配置为依据所述选择序列和所述空余信道，进行取模预算获得取模余值
    选择模块，配置为根据所述取模余值与空余信道的映射关系选择配置为数据发送的空余信道。
  24. 根据权利要16、17或18所述的装置，其中，
    所述选择单元，具体配置为当所述第一侦听结果或所述第二侦听结果中的碰撞信息表明发生资源占用碰撞时，则根据所述退避策略、所述第一侦听结果及所述第二侦听结果选择数据发送的时频资源。
  25. 根据权利要求24所述的装置，其中，
    所述选择单元，配置为根据发生资源占用碰撞的频域资源序号，确定时域优选级；及依据所述时域优选级及时域退避窗口的大小，确定各数据发送的时域资源；
    和/或
    依据发送资源占用碰撞的时域资源的先后，确定频域优选级；
    依据所述频域优选级及频域退避窗口的大小，确定各数据发送的频域 资源。
  26. 一种基于竞争的资源选择装置，所述装置包括：
    第一确定单元，配置为依据重发数据前一次占用的频域资源序号，确定各重发数据的时域优先级；或依据重发数据前一次占用的时域资源的先后，确定各重发数据的频域优先级；
    第二确定单元，配置为依据所述时域优先级级时域退避窗口的大小，确定发送各重发数据发送的时域资源；或依据所述频域优选级及频域退避窗口的大小，确定发送各重发数据的频域资源。
  27. 一种基于竞争的资源选择装置，所述装置包括：
    第三确定单元，配置为确定空余信道；
    获取单元，配置为获取选择序列；
    第四确定单元，配置为依据所述选择序列，选择空余信道。
  28. 根据权利要求27所述的装置，其中，
    所述获取单元，配置为依据终端属性信息和/或通信属性信息形成选择序列。
  29. 根据权利要求27所述的装置，其中，
    所述终端属性信息包括：终端的IMEI及终端的IMSI；
    所述通信属性信息包括：Tx-UE ID、Rx-UE ID、group ID、终端开机形成的子帧号或随机形成的随机序列。
  30. 根据权利要求27、28或29所述的装置，其中，所述第四确定单元，具体配置为依据所述选择序列和所述空余信道，进行取模预算获得取模余值；及根据所述取模余值与空余信道的映射关系选择配置为数据发送的空余信道。
  31. 一种计算机存储介质，所述计算机存储介质中存储有计算机可执行指令，所述计算机可执行指令用于执行权利要求1至15所述方法的至少 其中之一。
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