WO2023116348A1 - 信道接入方法、设备和存储介质 - Google Patents
信道接入方法、设备和存储介质 Download PDFInfo
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Definitions
- the present application relates to the communication field, for example, to a channel access method, device and storage medium.
- SideLink Sidelink
- SL Sidelink
- V2X vehicle to anything
- V2X vehicle to anything
- SL communication operates on licensed frequency bands or dedicated frequency bands, for example, V2X (vehicle to anything) communication can operate on frequency bands dedicated to the Internet of Vehicles.
- V2X vehicle to anything
- SL transmission on the traditional unlicensed band (Unlicensed band) is also becoming stronger and stronger.
- LBT Listen Before Talk
- the data transmission types include unicast, broadcast and multicast. Therefore, how to adjust the contention window for SL communication devices of different transmission types is an urgent problem to be solved.
- An embodiment of the present application provides a channel access method applied to a first communication node, including:
- An embodiment of the present application provides a channel access method applied to a second communication node, including:
- the second SL transmission It is the transmission performed within the channel occupation time obtained by using the first channel access type before the first SL transmission.
- An embodiment of the present application provides a channel access device, including: a communication module, a memory, and one or more processors; the communication module is configured to communicate and interact with other communication nodes; the memory is configured to One or more programs are stored; when the one or more programs are executed by the one or more processors, the one or more processors are made to implement the method described in any one of the above embodiments.
- An embodiment of the present application provides a storage medium, the storage medium stores a computer program, and when the computer program is executed by a processor, the method described in any one of the foregoing embodiments is implemented.
- FIG. 1 is a schematic diagram of a configuration of an LBT duration provided by an embodiment of the present application
- FIG. 2 is a schematic diagram of a sequence relationship between a first SL transmission and a second SL transmission provided by an embodiment of the present application;
- FIG. 3 is a flow chart of a channel access method provided in an embodiment of the present application.
- FIG. 4 is a flow chart of another channel access method provided by an embodiment of the present application.
- FIG. 5 is a structural block diagram of a channel access device provided in an embodiment of the present application.
- FIG. 6 is a structural block diagram of another channel access device provided by an embodiment of the present application.
- Fig. 7 is a schematic structural diagram of a channel access device provided by an embodiment of the present application.
- Direct communication can also be called SL communication, and SL communication refers to all direct communication later.
- SL communication can run on licensed frequency bands or dedicated frequency bands.
- V2X communication can run on frequency bands dedicated to the Internet of Vehicles.
- SL communication With the development of SL communication, the demand for SL transmission in traditional license-free frequency bands is also increasing. strong.
- a channel access process is required, which is generally called the LBT process to avoid interference with other system equipment.
- the LBT process corresponds to If the internal detection channel resource is determined to be idle during the detection period (LBT is successful), the user equipment (User Equipment, UE) can continue to transmit, otherwise, the UE needs to give up transmission.
- NR-U New Radio on Unlicensed band
- duration can be a fixed value (second channel access type, type 2), or a random value (first channel access type, type 1).
- first channel access type type 1
- the LBT duration may be a random number
- a parameter related to the random number set to N
- CW contention Window
- the random number N of the LBT duration is generally initialized to a random number between [0, CW].
- the value of CW is not fixed. Different transmission conditions and different channel access priorities may correspond to different contention window.
- FIG. 1 is a schematic diagram of a configuration of an LBT duration provided by an embodiment of the present application. As shown in FIG. 1 , when the channel is determined to be idle (idle) within the LBT duration, the device can transmit.
- channel access can be divided into different channel access priority classes (Channel Access Priority Class, CAPC), and different The contention window corresponding to CAPC can also be different.
- CW p can be recorded as the corresponding contention window for channel access with CAPC as p.
- the minimum value that can be used by CW p is recorded as CW p, min
- the maximum value that can be used is recorded as CW p, max .
- the longer the LBT duration the longer the access channel needs to be detected.
- the LBT is generally initialized to T d + N*T s1 , where T d is the backoff duration, N is a random integer value, and T s1 is the duration of a LBT detection slot (generally 9us), which conforms to the uniform distribution among [0, CW p ], competition The larger the window, the longer the corresponding LBT duration will be with greater probability.
- SL communication when there is business to be transmitted between devices, the business data between devices is not forwarded by other network devices, but is directly transmitted from the data source device to the target device, that is, direct communication between devices.
- SL communication has various transmission types (cast type):
- Unicast For unicast, only a specific device is the receiving end, and the receiving end feedbacks the received data.
- the feedback can be ACK or NACK feedback, that is, when the receiving end receives correctly, it feedbacks ACK; when receiving an error Feedback NACK.
- Multicast For multicast, only a specific group of devices is the receiving end, and the receiving end feeds back the received data
- Multicast type 1 (that is, the first multicast type): Feedback is only non-acknowledgment (Non-Acknowledgment, NACK) feedback, that is, no feedback is given when the receiver receives it correctly; NACK information is fed back when it is received incorrectly .
- the sending end uses the same resource to receive feedback information from all receiving ends. For example, all receivers use the same parameters when acquiring feedback resources, such as using the same group member number (member ID), so that all receivers acquire the same feedback resources.
- the feedback can be Acknowledgment (ACK) or NACK feedback, that is, when the reception is correct, ACK information is fed back; when the reception is wrong, NACK information is fed back.
- the sending end uses the same resource to receive the ACK feedback information of the receiving end, and the sending end uses another resource to receive the NACK feedback information of the receiving end.
- all receivers use the same set of parameters when acquiring ACK feedback resources, and another set of identical parameters when acquiring NACK feedback resources, for example, all receivers use the same group member number x (member ID) to acquire ACK resources, All receiving ends use the same group member number y (member ID) to obtain ACK resources, so that the ACK or NACK feedback resources obtained by all receiving ends are the same.
- the feedback can be ACK or NACK feedback, that is, when the receiving end receives correct information, ACK information is fed back; when the receiving end is incorrectly received, NACK information is fed back.
- the sending end uses respective resources for receiving.
- the receiving end uses its corresponding set of parameters when obtaining the feedback resource.
- a receiving end uses its own group member number to obtain the feedback resource, and the group member number can be configured by the upper layer. By configuring different group member numbers, the feedback resources obtained by each receiving end can be different or orthogonal.
- Broadcast For broadcasting, all surrounding UEs can be receivers, and the receivers do not feed back received data, that is, there is no ACK or NACK feedback. In addition, for multicast and unicast, feedback can also be disabled, that is, the receiving end of multicast and unicast does not perform feedback.
- the data transmission types include unicast, broadcast and multicast, and a unique method of determining or adjusting the contention window is designed for SL communication.
- This application is used to solve the channel access of devices communicating in the license-free frequency band problem, including methods for contention window adjustment for different transmission types (unicast, multicast, broadcast) in different situations.
- FIG. 2 is a schematic diagram of a sequence relationship between a first SL transmission and a second SL transmission provided by an embodiment of the present application. As shown in Figure 2, the second SL transmission precedes the first SL transmission.
- the UE performs the above-mentioned first channel access type (for example, using type 1 channel access) before sending the SL signal, which is called the first SL transmission, as shown in Figure 2; in one example, the first The channel access priority level for SL transmission is p.
- the UE performs one or more second SL transmissions at an opportunity before the first SL transmission, where the second SL transmissions may also be referred to as reference SL transmissions, and one or more second SL transmissions The transmission time period corresponding to the transmission may be referred to as a reference duration.
- the contention window adjustment strategy corresponding to the first SL transmission is determined.
- the second SL transmission is a transmission performed within the channel occupation time obtained by the UE using the first channel access type.
- the priority of the second SL transmission may be the same as the priority of the first SL transmission.
- the second SL transmission is the latest transmission within the channel occupation time obtained by the UE using the first channel access type, or the first transmission within the obtained channel occupation time, or the obtained channel occupation time Multiple transfers over time.
- the second SL transmission is SL transmission enabled with Hybrid Automatic Repeat reQuest (HARQ) feedback.
- the second SL transmission may correspond to a type of HARQ feedback or a transmission type (cast type); for example, it may be SL unicast with HARQ feedback enabled (HARQ feedback type is unicast ACK/NACK), SL multicast type 1 (HARQ feedback type is multicast NACK only), or SL multicast type 2 (HARQ feedback type is multicast ACK/NACK).
- FIG. 3 is a flowchart of a channel access method provided in an embodiment of the present application. This embodiment may be executed by the first communication node. Wherein, the first communication node may be a terminal side (for example, user equipment). As shown in FIG. 3 , this embodiment includes: S310-S330.
- the second SL transmission is transmission performed within the channel occupation time obtained by using the first channel access type before the first SL transmission.
- the feedback information is used to represent whether the second communication node successfully receives the service data sent by the first communication node.
- the feedback information includes at least one of the following: ACK information; NACK information.
- the second communication node successfully receives service data
- the second communication node feeds back ACK information to the first communication node; when the second communication node fails to receive service data, the second communication node feeds back ACK information to the first communication node NACK information.
- the second communication node refers to a receiving end of service data
- the first communication node is a sending end of service data.
- SL transmission types include: unicast, multicast and broadcast.
- the second communication node as the receiving end will not feedback the received service data, that is, there is no feedback of ACK information or NACK information
- the SL transmission types include unicast and Multicast will be described.
- S320 Determine a contention window adjustment policy for the first SL transmission according to the feedback information and the SL transmission type.
- the contention window adjustment policy is a policy for adjusting the length of the contention window corresponding to the first SL transmission.
- the competition window adjustment strategy includes one of the following: a first adjustment strategy; a second adjustment strategy; a third adjustment strategy; wherein, the first adjustment strategy is used to adjust the window length value of the competition window to allowable The minimum value or the allowed next smaller window length value; the second adjustment strategy is used to adjust the window length value of the competition window to the next allowed larger window length value; the third adjustment strategy is used to make the window length value of the competition window The length value remains unchanged.
- the first adjustment strategy may be an operation of reducing the window length value of the contention window corresponding to the first SL transmission;
- the second adjustment strategy may be an operation of reducing the window length value of the contention window corresponding to the first SL transmission An operation of increasing;
- the third adjustment strategy may be an operation in which the window length value of the contention window corresponding to the first SL transmission remains unchanged.
- the window length value of the contention window corresponding to the first SL transmission is adjusted according to the contention window adjustment policy, so as to The first communication node performs channel access in the license-free frequency band according to the adjusted contention window, thereby ensuring full utilization of the contention window and improving channel access efficiency of the first SL transmission.
- the second SL transmission is a transmission performed within the channel occupancy time acquired by using the first channel access type before the first SL transmission, including one of the following: the second SL transmission is the channel occupancy time acquired The latest transmission performed within the acquired channel occupation time; the second SL transmission is the first transmission performed within the acquired channel occupation time; the second SL transmission is multiple transmissions performed within the acquired channel occupation time.
- the first communication node may average the window length values of the contention windows corresponding to all the second SL transmissions, and according to The average value determines the contention window adjustment strategy for the first SL transmission.
- determining the contention window adjustment strategy for the first SL transmission according to the feedback information and the SL transmission type includes: determining the feedback success rate of the second SL transmission according to the feedback information of the second SL transmission under the SL transmission type;
- the feedback success rate and the preset feedback success rate threshold determine the contention window adjustment strategy for the first SL transmission.
- the feedback success rate of the second SL transmission may be characterized by the number of second SL transmissions whose feedback information is ACK information; the preset feedback success rate threshold is used to indicate whether the success rate requirement is met. If the feedback success rate reaches the preset feedback success rate threshold, the first communication node meets the success rate requirement; if the feedback success rate does not reach the preset feedback success rate threshold, the first communication node fails to meet the success rate requirement.
- determining the feedback success rate of the second SL transmission according to the feedback information of the second SL transmission under the SL transmission type includes: determining that the second SL transmission is a unicast transmission type, and determining that the feedback information is ACK information
- the number of second SL transmissions determining the feedback success rate of the second SL transmission according to the number of second SL transmissions whose feedback information is ACK information.
- one second SL transmission carries one transport block, and one transport block corresponds to one piece of feedback information.
- the number of second SL transmissions whose feedback information is ACK information may also be the number of transport blocks whose feedback information is ACK information.
- each second SL transmission includes at least one data block, each data block corresponds to a piece of feedback information, and the SL transmission type is unicast transmission, which is determined according to the feedback information of the second SL transmission under the SL transmission type
- the feedback success rate of the second SL transmission includes: determining the number of data blocks whose feedback information is ACK information in the second SL transmission under unicast transmission; determining the feedback success rate of the second SL transmission according to the number of data blocks of the ACK information.
- each second SL transmission may include one or more data blocks, and each data block corresponds to one piece of feedback information, that is, one second SL transmission may correspond to multiple pieces of feedback information.
- the number of data blocks of the ACK information is greater than or equal to the number of second SL transmissions corresponding to the feedback information being the ACK information.
- the feedback information may include ACK information and NACK information
- the feedback success rate of the second SL transmission is determined.
- the contention window adjustment strategy for the first SL transmission is determined according to the feedback success rate and the preset feedback success rate threshold, including one of the following:
- the feedback success rate of the second SL transmission reaches the preset feedback success rate threshold, and the contention window corresponding to each channel access priority level is adjusted according to the first adjustment strategy; the feedback success rate of the second SL transmission reaches the preset feedback success rate Threshold, adjust the contention window corresponding to the channel access priority level corresponding to the first SL transmission according to the first adjustment strategy; if the feedback success rate of the second SL transmission does not reach the preset feedback success rate threshold, adjust each The contention window corresponding to the channel access priority level; the feedback success rate of the second SL transmission does not reach the preset feedback success rate threshold, and the contention corresponding to the channel access priority level corresponding to the first SL transmission is adjusted according to the second adjustment strategy window.
- adjusting the contention window corresponding to each channel access priority level according to the first adjustment strategy or the second adjustment strategy also includes adjusting the channel corresponding to the first SL transmission according to the first adjustment strategy or the second adjustment strategy The contention window corresponding to the access priority level lock.
- the feedback success rate of the second SL transmission when the feedback success rate of the second SL transmission reaches the preset feedback success rate threshold, it indicates that the window length of the contention window corresponding to the second SL transmission is slightly larger and can be appropriately adjusted down, that is, according to The first adjustment strategy adjusts the contention window corresponding to each channel access priority level, or adjusts the contention window corresponding to the channel access priority level corresponding to the first SL transmission; the feedback success rate of the second SL transmission does not reach In the case of the preset feedback success rate threshold, it indicates that the open length value of the contention window corresponding to the second SL transmission is slightly smaller, which can be appropriately increased, that is, according to the second adjustment strategy to adjust the access priority level of each channel. The corresponding contention window, or adjust the contention window corresponding to the channel access priority level corresponding to the first SL transmission.
- determining the feedback success rate of the second SL transmission according to the feedback information of the second SL transmission under the SL transmission type includes: determining that the second SL transmission is the first multicast type whose feedback information is NACK information, determining The amount of feedback information under multicast transmission, or determine whether the feedback information under multicast transmission is detected; determine the feedback success rate of the second SL transmission according to the amount of feedback information or whether the feedback information is detected.
- the first multicast type means that the SL transmission type is multicast, and the feedback information includes NACK information fed back by using the same resource.
- the feedback success rate of the second SL transmission is determined according to the amount of feedback information under multicast transmission, or whether feedback information under multicast transmission is detected.
- the contention window adjustment strategy for the first SL transmission is determined according to the feedback success rate and the preset feedback success rate threshold, including one of the following:
- the feedback success rate of the second SL transmission reaches the preset feedback success rate threshold, adjust the contention window corresponding to each channel access priority level according to the first adjustment strategy, or adjust the channel corresponding to the first SL transmission according to the first adjustment strategy Access the contention window corresponding to the priority level; the feedback success rate of the second SL transmission does not reach the preset feedback success rate threshold, and adjust the contention window corresponding to each channel access priority level according to the second adjustment strategy, or according to the first
- the second adjustment strategy adjusts the contention window corresponding to the channel access priority level corresponding to the first SL transmission.
- the first multicast type is a multicast type that only feeds back NACK information. If no feedback information is detected in the second SL transmission, it indicates that the feedback success rate of the second SL transmission reaches the preset feedback success rate threshold. In an embodiment, when the feedback success rate of the second SL transmission reaches the preset feedback success rate threshold, the channel access priority corresponding to the first SL transmission may be adjusted according to the first adjustment strategy or the second adjustment strategy. contention window, that is, reduce or increase the window length value of the contention window corresponding to the channel access priority level lock corresponding to the first SL transmission.
- the contention window adjustment strategy for the first SL transmission is determined according to the feedback success rate and the preset feedback success rate threshold, including one of the following:
- the first multicast type is a multicast type that only feeds back NACK information.
- the channel access priority corresponding to the first SL transmission may be adjusted according to the second adjustment strategy or the third adjustment strategy.
- contention window that is, increase or maintain the window length value of the contention window corresponding to the channel access priority level lock corresponding to the first SL transmission.
- the contention window adjustment strategy for the first SL transmission is determined according to the feedback success rate and the preset feedback success rate threshold, including one of the following:
- the first multicast type is a multicast type that only feeds back NACK information.
- the channel access priority corresponding to the first SL transmission may be adjusted according to the first adjustment strategy or the third adjustment strategy.
- contention window that is, reduce or maintain the window length value of the contention window corresponding to the channel access priority level lock corresponding to the first SL transmission.
- the second SL transmission adopts the second multicast type whose feedback information is ACK information or NACK information; the contention window adjustment strategy of the first SL transmission is determined according to the feedback information and the SL transmission type, including one of the following:
- the first communication node at least receives the ACK information, adjusts the contention window corresponding to each channel access priority level according to the first adjustment strategy, or adjusts the channel access priority level corresponding to the first SL transmission according to the first adjustment strategy contention window; the first communication node does not receive the ACK information, adjust the contention window corresponding to each channel access priority level according to the second adjustment strategy, or adjust the channel access corresponding to the first SL transmission according to the second adjustment strategy
- the contention window corresponding to the priority class The contention window corresponding to the priority class.
- the first adjustment The strategy adjusts the contention window corresponding to each channel access priority level, or adjusts the contention window corresponding to the channel access priority level corresponding to the first SL transmission according to the first adjustment strategy; if the feedback information of the second SL transmission is only If NACK information is received, or no feedback information is received, adjust the contention window corresponding to each channel access priority level according to the second adjustment strategy, or adjust the channel access corresponding to the first SL transmission according to the second adjustment strategy The contention window corresponding to the priority class.
- the second SL transmission adopts the second multicast type; wherein, the second multicast type uses the same resource to feed back ACK information or NACK information.
- the first communication node only receives the ACK message, adjusts the contention window corresponding to each channel access priority level according to the first adjustment strategy, or adjusts the channel access priority level corresponding to the first SL transmission according to the first adjustment strategy contention window; the first communication node receives ACK information and NACK information, adjusts the contention window corresponding to each channel access priority level according to the third adjustment strategy, or adjusts the channel corresponding to the first SL transmission according to the third adjustment strategy Access the contention window corresponding to the priority level; the first communication node does not receive the ACK information, adjust the contention window corresponding to each channel access priority level according to the second adjustment strategy, or adjust the first SL according to the second adjustment strategy The contention window corresponding to the channel access priority level corresponding to the transmission.
- the access priority level of each channel is adjusted according to the first adjustment strategy
- the corresponding contention window or adjust the contention window corresponding to the channel access priority level corresponding to the first SL transmission according to the first adjustment strategy; if the feedback information of the second SL transmission is received ACK information and NACK information, then according to the first adjustment strategy
- the third adjustment strategy adjusts the contention window corresponding to each channel access priority level, or adjusts the contention window corresponding to the channel access priority level corresponding to the first SL transmission according to the third adjustment strategy; if the feedback information of the second SL transmission To only receive NACK information, or not receive feedback information, adjust the contention window corresponding to each channel access priority level according to the second adjustment strategy, or adjust the channel corresponding to the first SL transmission according to the second adjustment strategy The contention window corresponding to the access priority level.
- the second SL transmission adopts the second multicast type; wherein, the second multicast type is to use the same resource to feed back ACK information or NACK information; determine the contention of the first SL transmission according to the feedback information and the SL transmission type Window adjustment strategy, including one of the following:
- the first communication node only receives the ACK information, adjusts the contention window corresponding to each channel access priority level according to the first adjustment strategy, or adjusts the channel access priority level corresponding to the first SL transmission according to the first adjustment strategy contention window; the first communication node only receives NACK information, receives ACK information and NACK information at the same time, or does not receive the feedback message, and adjusts the contention window corresponding to each channel access priority level according to the second adjustment strategy , or adjust the contention window corresponding to the channel access priority level corresponding to the first SL transmission according to the second adjustment strategy.
- the access priority level of each channel is adjusted according to the first adjustment strategy The corresponding contention window, or adjust the contention window corresponding to the channel access priority level corresponding to the first SL transmission according to the first adjustment strategy; if the feedback information of the second SL transmission is that only NACK information is received, and ACK information is received at the same time and NACK information, or if no feedback message is received, adjust the contention window corresponding to each channel access priority level according to the second adjustment strategy, or adjust the channel access priority corresponding to the first SL transmission according to the second adjustment strategy The contention window corresponding to the level.
- the second SL transmission adopts the third multicast type; wherein, the second communication node of the third multicast type uses corresponding resources to feed back ACK information or NACK information; according to the feedback information and the SL transmission type, the first The contention window adjustment strategy for SL transmission, including:
- the feedback information of the second SL transmission under multicast transmission is the quantity of ACK information, the proportion of ACK information, the quantity of second communication nodes corresponding to ACK information or the proportion of second communication nodes corresponding to ACK information; according to the quantity of ACK information , the proportion of the ACK information, the number of second communication nodes corresponding to the ACK information, or the proportion of the second communication nodes corresponding to the ACK information determine the contention window adjustment strategy for the first SL transmission.
- the first communication node can accurately determine whether to feed back ACK information The number of second communication nodes, and the number of second communication nodes that feed back NACK information.
- the quantity of the ACK information is the same as the quantity of the second communication nodes corresponding to the ACK information
- the proportion of the ACK information is the same as the proportion of the second communication nodes corresponding to the ACK information.
- the contention window adjustment strategy for the first SL transmission is determined according to the ACK information or the number of second communication nodes corresponding to the ACK information, including one of the following:
- the ACK information or the number of second communication nodes corresponding to the ACK information is greater than or equal to the first threshold value, and the contention window corresponding to each channel access priority level is adjusted according to the first adjustment strategy, or the first adjustment strategy is adjusted according to the first adjustment strategy.
- a contention window corresponding to the channel access priority level corresponding to SL transmission; ACK information or the number of second communication nodes corresponding to the ACK information is less than the second threshold value, and each channel access priority level is adjusted according to the second adjustment strategy
- the ACK information or the number of second communication nodes corresponding to the ACK information when the ACK information or the number of second communication nodes corresponding to the ACK information is greater than the first threshold value, it indicates that the window length value of the contention window corresponding to the second SL transmission is slightly larger, but the window can be appropriately reduced
- the length value is to adjust the contention window corresponding to each channel access priority level according to the first adjustment strategy, or to adjust the contention window corresponding to the channel access priority level corresponding to the first SL transmission according to the first adjustment strategy.
- the first threshold may be the same as the second threshold, or may be greater than the second threshold.
- the first threshold value and the second threshold value are integers greater than 1 and less than the total number of second communication nodes minus 1.
- the first threshold and the second threshold may also be 1, or a positive integer that is the total number of second communication nodes minus 1.
- the contention window adjustment strategy for the first SL transmission is determined according to the ACK information or the proportion of the second communication node corresponding to the ACK information, including one of the following:
- the ACK information or the proportion of the second communication node corresponding to the ACK information is greater than or equal to the third threshold value, adjust the contention window corresponding to each channel access priority level according to the first adjustment strategy, or adjust the first adjustment strategy according to the first adjustment strategy
- ACK information or the proportion of the second communication node corresponding to the ACK information is less than the fourth threshold value, and each channel access priority level is adjusted according to the second adjustment strategy
- the ACK information or the proportion of the second communication node corresponding to the ACK information when the ACK information or the proportion of the second communication node corresponding to the ACK information is greater than the third threshold value, it indicates that the window length value of the contention window corresponding to the second SL transmission is slightly larger, but the window can be appropriately reduced
- the length value is to adjust the contention window corresponding to each channel access priority level according to the first adjustment strategy, or to adjust the contention window corresponding to the channel access priority level corresponding to the first SL transmission according to the first adjustment strategy.
- the ACK information or the proportion of the second communication node corresponding to the ACK information is less than the fourth threshold value, it indicates that the window length value of the contention window corresponding to the second SL transmission is slightly smaller, but the window length can be appropriately increased value, that is, adjust the contention window corresponding to each channel access priority level according to the second adjustment strategy, or adjust the contention window corresponding to the channel access priority level corresponding to the first SL transmission according to the second adjustment strategy.
- the third threshold may be the same as the fourth threshold, or may be greater than the fourth threshold.
- the third threshold value and the fourth threshold value are real numbers ranging from 0 to 1.
- the third threshold or the fourth threshold may be 10% or 100%.
- the first communication node may adjust the contention window corresponding to each channel access priority level according to the third adjustment strategy, or adjust the contention window corresponding to each channel access priority level according to the third adjustment strategy.
- the adjustment policy adjusts the contention window corresponding to the channel access priority level corresponding to the first SL transmission.
- the first communication node determines the contention window adjustment strategy for the first SL transmission according to the current busyness.
- the current busyness of the channel may be a value from 0 to 1.
- the first communication node selects the contention window target length corresponding to the channel access priority level according to the measured current busyness, and then determines the contention window adjustment strategy for the first SL transmission according to the contention window target length, And adjust the current length of the contention window of the first SL transmission according to the contention window adjustment strategy.
- determining the contention window adjustment strategy for the first SL transmission according to the current busyness level includes:
- determining the contention window adjustment strategy for the first SL transmission according to the current busyness level includes:
- the current busyness level is greater than or equal to the first busyness level threshold, adjust the contention window corresponding to each channel access priority level according to the second adjustment strategy, or adjust the channel access corresponding to the first SL transmission according to the second adjustment strategy
- the contention window corresponding to the channel access priority level corresponding to the transmission; the current busyness degree is greater than the second busyness level threshold and less than the first busyness level threshold, and the channel corresponding to each channel access priority level is adjusted according to the third adjustment strategy or adjust the contention window corresponding to the channel access priority level corresponding to the first SL transmission according to the third adjustment strategy; wherein, the first busyness threshold is greater than or equal to the second busyness threshold.
- the first busyness level threshold and the second busyness level threshold may be the same value or different values, which are not limited and may be set
- the preset feedback condition includes one of the following:
- the second SL transmission is feedback information that does not enable feedback; the first SL transmission is feedback information that does not enable feedback; the first SL transmission is feedback information and SL transmission type that enables feedback, and the SL transmission type is unicast transmission , and the second communication node uses the same resource to transmit feedback information; the second SL transmission is the SL transmission type that enables feedback, and the first communication node does not obtain the feedback message; the first communication node does not obtain the second SL transmission Feedback message, and the first SL transmission does not include retransmission; the first communication node does not obtain the feedback message of the second SL transmission, and the first SL transmission is performed in a time window after the detection duration corresponding to the second SL transmission transmission.
- FIG. 4 is a flow chart of another channel access method provided by the embodiment of the present application. This embodiment is applied to the second communication node.
- the second communication node may be a terminal (for example, user equipment).
- the channel access method in this embodiment includes S210.
- S410 Send the feedback information and SL transmission type of the second SL transmission corresponding to the first SL transmission to the first communication node, so that the first communication node determines the contention window adjustment policy of the first SL transmission according to the feedback information and the SL transmission type , and adjust the contention window corresponding to the first SL transmission according to the contention window adjustment strategy, so that the first communication node performs channel access according to the contention window; wherein, the second SL transmission uses the first channel access before the first SL transmission Transmissions made within the channel occupancy time acquired by the entry type.
- the second SL transmission is a transmission performed within the channel occupation time acquired by using the first channel access type before the first SL transmission, including one of the following: the second SL transmission is acquired The latest transmission performed within the channel occupation time; the second SL transmission is the first transmission within the acquired channel occupation time; the second SL transmission is multiple transmissions performed within the acquired channel occupation time.
- the competition window adjustment strategy includes one of the following: a first adjustment strategy; a second adjustment strategy; a third adjustment strategy; wherein, the first adjustment strategy is used to adjust the window length value of the competition window to The allowed minimum value or the next smaller window length value allowed; the second adjustment strategy is used to adjust the window length value of the competition window to the next allowed larger window length value; the third adjustment strategy uses To keep the window length value of the competition window constant.
- the determination process of the contention window adjustment strategy for the first SL transmission Be explained.
- the HARQ feedback information of the second SL transmission is ACK information and/or NACK information
- the SL transmission type (cast type) is unicast transmission enabling feedback
- the HARQ feedback success rate of the second SL transmission is determined and Determine whether the success rate meets the requirements, including the following examples:
- each second SL transmission corresponds to one piece of HARQ feedback information, that is, adopts HARQ feedback based on SL transmission block, and if the HARQ feedback information corresponding to at least one second SL transmission is ACK information, then it is determined that the accuracy rate meets the requirement.
- meeting the requirements refers to reaching a preset feedback success rate threshold.
- each of the one or more second SL transmissions may include at least one data block, and each data block corresponds to its own HARQ feedback information, that is, the data block-based HARQ feedback information is used , at this time, the number or ratio of the data blocks whose HARQ feedback information is ACK information is greater than or equal to the threshold T, then it is determined that the accuracy rate meets the requirement.
- the data block is a CB (code block), a CBG (code block group), or a data unit (data unit).
- the UE adjusts the contention window corresponding to each channel access priority level according to the first adjustment strategy. Adjusting the contention window corresponding to each channel access priority also includes adjusting the contention window corresponding to the CAPC of the first SL transmission. In an example, if it is determined that the accuracy rate meets the requirements, the UE may also adjust the contention window corresponding to the CAPC of the first SL transmission according to the first adjustment strategy.
- the UE adjusts the contention window corresponding to each channel access priority level according to the second adjustment strategy. Adjusting the contention window corresponding to each channel access priority also includes adjusting the contention window corresponding to the CAPC of the first SL transmission. In an example, if it is determined that the accuracy rate does not meet the requirement, the UE may also adjust the contention window corresponding to the CAPC of the first SL transmission according to the second adjustment strategy.
- the UE adjusts the contention window, unless otherwise specified, it means that the UE adjusts the contention window corresponding to each channel access priority level or adjusts the contention window corresponding to the CAPC of the first SL transmission.
- multicast may also include broadcast, for example, a broadcast with NACK feedback enabled may also be called multicast type 1.
- the SL transmission type of the second SL transmission is a feedback-enabled multicast transmission
- the feedback information uses the same resource to only feed back NACK information
- the first communication node is the sending UE
- the second communication node is Taking the receiving UE as an example, the process of determining the contention window adjustment policy for the first SL transmission is described.
- the HARQ feedback information of the second SL transmission is NACK information
- the SL transmission type is the first multicast type that enables feedback
- the HARQ feedback success rate of the second SL transmission is determined and judged whether the success rate meets the requirements , including the following examples:
- each second SL transmission corresponds to one piece of HARQ feedback information, and only NACK information can be fed back, and no feedback is given if it is ACK information.
- the sending UE cannot accurately know how many receiving UEs have given feedback, and if the receiving UE does not give feedback, the sending UE cannot distinguish the following situations:
- Case 1 The receiving UE has correctly received the SL transmission and no feedback is required.
- Case 2 The receiving UE detects the SL transmission, but fails to receive it, but cannot feed back NACK because there is no competition for the channel.
- the sending UE may mistakenly judge the cases 2 and 3 as reception success, but actually the reception fails.
- the sending UE cannot determine whether any receiving UEs have received it correctly, but can only determine that some UEs have not received it correctly.
- the number of successfully received UEs or the number of successfully received UEs The proportion of all receiving UEs is unknown to the sending UE.
- the HARQ feedback information corresponding to at least x second SL transmissions is no feedback information, that is, no feedback information is detected, and it is determined that the accuracy rate meets the requirement.
- the HARQ feedback information corresponding to the first or last second SL transmission is no feedback information, that is, no feedback information is detected, it is determined that the accuracy rate meets the requirement.
- the UE adjusts the contention window corresponding to each channel access priority level or adjusts the contention window corresponding to the CAPC of the first SL transmission according to the first adjustment strategy; otherwise, the UE adjusts the contention window corresponding to the CAPC of the first SL transmission;
- the second adjustment policy adjusts the contention window corresponding to each channel access priority level or adjusts the contention window corresponding to the CAPC of the first SL transmission. In this example, the UE adjusts the contention window in a unicast-like manner.
- the UE adjusts the contention window corresponding to each channel access priority level or adjusts the contention window corresponding to the CAPC of the first SL transmission according to the third adjustment strategy; otherwise, the UE adjusts the contention window corresponding to the CAPC of the first SL transmission;
- the second adjustment policy adjusts the contention window corresponding to each channel access priority level or adjusts the contention window corresponding to the CAPC of the first SL transmission.
- the UE adjusts the contention window corresponding to each channel access priority level or adjusts the contention window corresponding to the CAPC of the first SL transmission according to the first adjustment strategy; otherwise, the UE adjusts the contention window corresponding to the CAPC of the first SL transmission;
- the third adjustment strategy adjusts the contention window corresponding to each channel access priority level or adjusts the contention window corresponding to the CAPC of the first SL transmission.
- the SL transmission type of the second SL transmission is a feedback-enabled multicast transmission
- the feedback information is to use the same resource to feed back ACK information and NACK information
- the first communication node is the sending UE
- the second communication node The node takes the receiving UE as an example to describe the process of determining the contention window adjustment policy for the first SL transmission.
- the HARQ feedback information of the second SL transmission is ACK information and NACK information
- the S1 transmission type is the second multicast type that enables feedback
- the HARQ feedback success rate of the second SL transmission is determined and judged whether the success rate is Meet the requirements, including the following examples:
- each second SL transmission corresponds to a piece of HARQ feedback information, if the reception is wrong, NACK information is fed back; if the reception is correct, ACK information is fed back.
- ACK information can be fed back. Similar to the first multicast type, multiple receiving UEs feed back ACK information on the same resource, or feed back NACK information on the same resource, and the sending UE cannot distinguish between receiving UE. For the second multicast type, the sending UE cannot accurately know how many receiving UEs feed back ACKs and how many receiving UEs feed back NACKs. In addition, the sending UE receives the HARQ feedback including the following situations:
- Case 1 The sending UE only receives ACK information.
- Case 3 The sending UE has received ACK information and NACK information.
- the feedback of the second SL transmission is case 1 or 3, that is, the feedback information includes at least ACK information, and the UE adjusts the contention window corresponding to each channel access priority level or adjusts the first SL according to the first adjustment strategy.
- the feedback of the second SL transmission is case 1, and the UE adjusts the contention window corresponding to each channel access priority level or adjusts the contention window corresponding to the CAPC of the first SL transmission according to the first adjustment strategy; if For case 3, the contention window is adjusted according to the third adjustment strategy; otherwise, the UE adjusts the contention window according to the second adjustment strategy.
- the feedback of the second SL transmission is case 1, and the UE adjusts the contention window corresponding to each channel access priority level or adjusts the contention window corresponding to the CAPC of the first SL transmission according to the first adjustment strategy; otherwise , the UE adjusts the contention window according to the second adjustment strategy.
- the above-mentioned second SL transmission is at least one of one or more SL transmissions, the first or the last second SL transmission.
- the SL transmission type of the second SL transmission is a feedback-enabled multicast transmission
- the feedback information is to use corresponding resources to feed back ACK information and NACK information
- the first communication node is the sending UE
- the second communication node Taking the receiving UE as an example, the process of determining the contention window adjustment policy for the first SL transmission is described.
- the HARQ feedback information of the second SL transmission is ACK information and NACK information
- the SL transmission type (cast type) is a third multicast type that enables feedback
- the HARQ feedback success rate of the second SL transmission is determined and Determine whether the success rate meets the requirements, including the following examples:
- each second SL transmission corresponds to a piece of HARQ feedback information
- each receiving UE feeds back NACK information if the reception is wrong, and feeds back ACK information if the reception is correct.
- each receiving UE feeds back ACK information on its own resource, or feeds back NACK information
- the sending UE knows the total number m of receiving UEs , for example, the receiving UE knows that the total number of group members (group size) is m, then excluding the sending UE itself, the number of receiving UEs is m-1.
- the sending UE can know how many receiving UEs feed back ACK information and how many receiving UEs feed back NACK information by detecting feedback. Wherein, it is assumed that the number of detected ACK information is k.
- the quantity k of ACK information corresponding to the second SL transmission is greater than or equal to the threshold T1, and the UE adjusts the contention window corresponding to each channel access priority level or adjusts the CAPC of the first SL transmission according to the first adjustment strategy the corresponding contention window; otherwise, the UE adjusts the contention window according to the second adjustment strategy.
- the proportion of ACK information corresponding to the second SL transmission is expressed as k/(m-1, which is greater than or equal to the threshold T2.
- An adjustment strategy adjusts the contention window corresponding to each channel access priority level or adjusts the contention window corresponding to the CAPC of the first SL transmission; otherwise, the UE adjusts the contention window according to the second adjustment strategy.
- the thresholds T1 and T2 are predefined, configured or preconfigured values.
- T1 is a number between 1 and m-1, in a special case, T1 can also be 1 or m-1;
- T2 is generally a number between 0 and 1, such as 10%, in another special case In this case, T2 may also be 100%, that is, all receiving UEs feed back ACKs to meet the accuracy rate condition.
- the above-mentioned second SL transmission includes one or more SL transmissions, at least one SL in the one or more SL transmissions, the first SL or the last SL.
- the HARQ feedback information of the second SL transmission uses the same resource to feed back NACK information
- the SL transmission type (cast type) is the first multicast type that enables feedback.
- the UE may not perform the contention window operation based on the accuracy rate, but adjust the contention window based on the subordinate method:
- Mode 1 In an example, if the second SL transmission is the first multicast type with feedback enabled, the UE adjusts the contention window corresponding to each channel access priority level or adjusts the first SL transmission according to the third adjustment strategy The contention window corresponding to the CAPC. That is, no matter whether feedback is received or not, the last contention window is used without adjusting the contention window.
- Mode 2 In an example, if the second SL transmission is the first multicast type that enables feedback, the UE determines the busyness of the current channel (CBR, channel busy ratio, or channel occupied ratio, and changes the value to 0 to 1), adjust the contention window corresponding to each channel access priority level or adjust the contention window corresponding to the CAPC of the first SL transmission according to the busyness of the channel.
- CBR busyness of the current channel
- CAPC channel occupied ratio
- the contention window size corresponding to different channel busyness levels can be configured or pre-configured, the contention window size corresponding to different channel busyness levels, taking CBR as an example, as shown in Table 1 below:
- the UE uses Table 1 to select an appropriate contention window for each channel access priority according to the measured channel busyness.
- the second SL transmission is the first multicast type with feedback enabled, it includes at least one of the following:
- the UE adjusts the access priority of each channel according to the second adjustment strategy
- the UE adjusts the access priority of each channel according to the first adjustment strategy
- the UE adjusts the contention window corresponding to each channel access priority level or adjusts the contention window corresponding to the CAPC of the first SL transmission according to the third adjustment strategy.
- threshold 1 and threshold 2 may be the same value, that is, only one threshold value needs to be configured or preconfigured.
- the current busyness degree is used in the above embodiment.
- the defined contention window adjustment policy is also applicable to the following scenarios, that is, "the second SL transmission is the first multicast type with feedback enabled" in the previous embodiment can be replaced with the following scenario:
- the second SL transmission is HARQ feedback information or SL transmission type (cast type) for which no feedback is enabled. For example, it may be broadcast, and unicast and multicast of feedback may be disabled.
- the first SL transmission is HARQ feedback information or SL transmission type (cast type) whose feedback is not enabled. For example, it may be broadcast, and unicast and multicast of feedback may be disabled.
- Scenario 3 The first SL transmission is the first multicast type with feedback enabled.
- the second SL transmission is a feedback-enabled SL transmission type (cast type), but the UE has not obtained the feedback result of the second SL transmission, that is, the feedback result of the second SL transmission is not available.
- cast type feedback-enabled SL transmission type
- Scenario 5 The UE does not obtain the feedback result of the second SL transmission, and the first SL transmission does not include retransmission, or the first SL transmission is within a time window (time window, Tw) after the reference duration of the second SL transmission transmissions made.
- FIG. 5 is a structural block diagram of a channel access device provided in an embodiment of the present application. This embodiment is applied to the first communication node. As shown in FIG. 5 , this embodiment includes: an acquisition module 510 , a determination module 520 and an adjustment module 530 .
- the obtaining module 510 is configured to obtain the feedback information and the SL transmission type of the second SL transmission corresponding to the first side link SL transmission, wherein the second SL transmission is obtained by using the first channel access type before the first SL transmission transmissions during the channel occupation time.
- the determination module 520 is configured to determine a contention window adjustment policy for the first SL transmission according to the feedback information and the SL transmission type.
- the adjustment module 530 is configured to adjust the contention window corresponding to the first SL transmission according to the contention window adjustment strategy, so that the first communication node performs channel access according to the contention window.
- the second SL transmission is a transmission performed within the channel occupancy time acquired by using the first channel access type before the first SL transmission, including one of the following: the second SL transmission is the channel occupancy time acquired The latest transmission performed within the acquired channel occupation time; the second SL transmission is the first transmission performed within the acquired channel occupation time; the second SL transmission is multiple transmissions performed within the acquired channel occupation time.
- the competition window adjustment strategy includes one of the following: a first adjustment strategy; a second adjustment strategy; a third adjustment strategy; wherein, the first adjustment strategy is used to adjust the window length value of the competition window to allowable The minimum value or the allowed next smaller window length value; the second adjustment strategy is used to adjust the window length value of the competition window to the next allowed larger window length value; the third adjustment strategy is used to make the window length value of the competition window The length value remains unchanged.
- the determining module 520 includes:
- the first determination unit is configured to determine the feedback success rate of the second SL transmission according to the feedback information of the second SL transmission under the SL transmission type; the second determination unit is configured to determine the second SL transmission according to the feedback success rate and a preset feedback success rate threshold A contention window adjustment strategy for SL transmission.
- the first determination unit includes:
- the first determining subunit is configured to determine that the second SL transmission is a unicast transmission type, and determine the number of second SL transmissions whose feedback information is ACK information; the second determining subunit is configured to determine the second SL transmission whose feedback information is ACK information The number of two SL transmissions determines the feedback success rate of the second SL transmission.
- each second SL transmission includes at least one data block, each data block corresponds to one piece of feedback information, and the SL transmission type is unicast transmission, and the first determination unit includes:
- the third determination subunit is configured to determine the number of data blocks whose feedback information is ACK information in the second SL transmission under unicast transmission; the fourth determination subunit is configured to determine the feedback of the second SL transmission according to the number of data blocks of ACK information Success rate.
- the second determining unit is configured as one of the following:
- the feedback success rate of the second SL transmission reaches the preset feedback success rate threshold, and the contention window corresponding to each channel access priority level is adjusted according to the first adjustment strategy; the feedback success rate of the second SL transmission reaches the preset feedback success rate Threshold, adjust the contention window corresponding to the channel access priority level corresponding to the first SL transmission according to the first adjustment strategy; if the feedback success rate of the second SL transmission does not reach the preset feedback success rate threshold, adjust each The contention window corresponding to the channel access priority level; the feedback success rate of the second SL transmission does not reach the preset feedback success rate threshold, and the contention corresponding to the channel access priority level corresponding to the first SL transmission is adjusted according to the second adjustment strategy window.
- the first determination unit includes:
- the fifth determination subunit is configured such that the second SL transmission is the first multicast type whose feedback information is non-confirmation NACK information, determines the amount of feedback information under multicast transmission, or determines whether the feedback information under multicast transmission is detected
- the sixth determination subunit is configured to determine the feedback success rate of the second SL transmission according to the amount of feedback information or whether feedback information is detected.
- the second determining unit is configured as one of the following:
- the feedback success rate of the second SL transmission reaches the preset feedback success rate threshold, adjust the contention window corresponding to each channel access priority level according to the first adjustment strategy, or adjust the channel corresponding to the first SL transmission according to the first adjustment strategy Access the contention window corresponding to the priority level; the feedback success rate of the second SL transmission does not reach the preset feedback success rate threshold, and adjust the contention window corresponding to each channel access priority level according to the second adjustment strategy, or according to the first
- the second adjustment strategy adjusts the contention window corresponding to the channel access priority level corresponding to the first SL transmission.
- the second determining unit is configured as one of the following:
- the feedback success rate of the second SL transmission When the feedback success rate of the second SL transmission reaches the preset feedback success rate threshold, adjust the contention window corresponding to each channel access priority level according to the third adjustment strategy, or adjust the contention window corresponding to the first SL transmission according to the third adjustment strategy.
- the contention window corresponding to the channel access priority level; the feedback success rate of the second SL transmission does not reach the preset feedback success rate threshold, and the contention window corresponding to each channel access priority level is adjusted according to the second adjustment strategy, or according to The second adjustment policy adjusts the contention window corresponding to the channel access priority level corresponding to the first SL transmission.
- the second determining unit is configured as one of the following:
- the feedback success rate of the second SL transmission When the feedback success rate of the second SL transmission reaches the preset feedback success rate threshold, adjust the contention window corresponding to each channel access priority level according to the first adjustment strategy, or adjust the contention window corresponding to the first SL transmission according to the first adjustment strategy.
- the contention window corresponding to the channel access priority level; the feedback success rate of the second SL transmission does not reach the preset feedback success rate threshold, and the contention window corresponding to each channel access priority level is adjusted according to the third adjustment strategy, or according to The third adjustment strategy adjusts the contention window corresponding to the channel access priority level corresponding to the first SL transmission.
- the second SL transmission adopts the second multicast type whose feedback information is ACK information or NACK information;
- the determination module 520 is configured as one of the following:
- the first communication node at least receives the ACK information, adjusts the contention window corresponding to each channel access priority level according to the first adjustment strategy, or adjusts the channel access priority level corresponding to the first SL transmission according to the first adjustment strategy contention window; the first communication node does not receive the ACK information, adjust the contention window corresponding to each channel access priority level according to the second adjustment strategy, or adjust the channel access corresponding to the first SL transmission according to the second adjustment strategy
- the contention window corresponding to the priority class The contention window corresponding to the priority class.
- the second SL transmission adopts the second multicast type; wherein, the second multicast type is to use the same resource to feed back ACK information or NACK information
- the determining module 520 is configured as one of the following:
- the first communication node only receives the ACK message, adjusts the contention window corresponding to each channel access priority level according to the first adjustment strategy, or adjusts the channel access priority level corresponding to the first SL transmission according to the first adjustment strategy contention window; the first communication node receives ACK information and NACK information, adjusts the contention window corresponding to each channel access priority level according to the third adjustment strategy, or adjusts the channel corresponding to the first SL transmission according to the third adjustment strategy Access the contention window corresponding to the priority level; the first communication node does not receive the ACK information, adjust the contention window corresponding to each channel access priority level according to the second adjustment strategy, or adjust the first SL according to the second adjustment strategy The contention window corresponding to the channel access priority level corresponding to the transmission.
- the second SL transmission adopts the second multicast type; wherein, the second multicast type uses the same resource to feed back ACK information or NACK information.
- the determining module 520 is configured as one of the following:
- the first communication node only receives the ACK information, adjusts the contention window corresponding to each channel access priority level according to the first adjustment strategy, or adjusts the channel access priority level corresponding to the first SL transmission according to the first adjustment strategy contention window; the first communication node only receives NACK information, receives ACK information and NACK information at the same time, or does not receive the feedback message, and adjusts the contention window corresponding to each channel access priority level according to the second adjustment strategy , or adjust the contention window corresponding to the channel access priority level corresponding to the first SL transmission according to the second adjustment strategy.
- the second SL transmission adopts the third multicast type; wherein, the second communication node of the third multicast type uses corresponding resources to feed back ACK information or NACK information
- Determining module 520 comprising:
- the third determining unit is configured to determine that the feedback information of the second SL transmission under multicast transmission is the number of ACK information, the ratio of ACK information, the number of second communication nodes corresponding to the ACK information, or the number of second communication nodes corresponding to the ACK information Proportion; the fourth determination unit is configured to determine the contention window adjustment of the first SL transmission according to the quantity of ACK information, the proportion of ACK information, the number of second communication nodes corresponding to ACK information, or the proportion of second communication nodes corresponding to ACK information Strategy.
- the contention window adjustment strategy for the first SL transmission is determined according to the ACK information or the number of second communication nodes corresponding to the ACK information, including one of the following:
- the ACK information or the number of second communication nodes corresponding to the ACK information is greater than or equal to the first threshold value, and the contention window corresponding to each channel access priority level is adjusted according to the first adjustment strategy, or the first adjustment strategy is adjusted according to the first adjustment strategy.
- a contention window corresponding to the channel access priority level corresponding to SL transmission; ACK information or the number of second communication nodes corresponding to the ACK information is less than the second threshold value, and each channel access priority level is adjusted according to the second adjustment strategy
- the contention window adjustment strategy for the first SL transmission is determined according to the ACK information or the proportion of the second communication node corresponding to the ACK information, including one of the following:
- the ACK information or the proportion of the second communication node corresponding to the ACK information is greater than or equal to the third threshold value, adjust the contention window corresponding to each channel access priority level according to the first adjustment strategy, or adjust the first adjustment strategy according to the first adjustment strategy
- ACK information or the proportion of the second communication node corresponding to the ACK information is less than the fourth threshold value, and each channel access priority level is adjusted according to the second adjustment strategy
- the feedback information and the SL transmission type meet the preset feedback condition; the determination module 520 is configured to: adjust the contention window corresponding to each channel access priority level according to the third adjustment strategy, or adjust the contention window according to the third adjustment strategy The policy adjusts the contention window corresponding to the channel access priority level corresponding to the first SL transmission.
- the feedback information and the SL transmission type meet the preset feedback condition; the determining module 520 includes:
- the fifth determination unit is configured to determine the current busyness level of the channel where the first communication node is located; the sixth determination unit is configured to determine the contention window adjustment strategy for the first SL transmission according to the current busyness level.
- the sixth determination unit includes:
- the seventh determination subunit is configured to determine the contention window target length corresponding to the first SL transmission according to the current busyness and idleness level and the channel access priority level corresponding to the first SL transmission; the adjustment subunit is configured to determine the contention window target length according to the contention window target length Adjust the contention window corresponding to the first SL transmission.
- the sixth determination unit is configured to:
- the current busyness level is greater than or equal to the first busyness level threshold, adjust the contention window corresponding to each channel access priority level according to the second adjustment strategy, or adjust the channel access corresponding to the first SL transmission according to the second adjustment strategy
- the contention window corresponding to the priority level is less than the second busyness level threshold, adjust the contention window corresponding to each channel access priority level according to the first adjustment strategy, or adjust the first SL according to the first adjustment strategy
- the contention window corresponding to the channel access priority level corresponding to the transmission; the current busyness degree is greater than the second busyness level threshold and less than the first busyness level threshold, and the channel corresponding to each channel access priority level is adjusted according to the third adjustment strategy or adjust the contention window corresponding to the channel access priority level corresponding to the first SL transmission according to the third adjustment strategy; wherein, the first busyness threshold is greater than or equal to the second busyness threshold.
- the preset feedback condition includes one of the following:
- the second SL transmission is feedback information that does not enable feedback; the first SL transmission is feedback information that does not enable feedback; the first SL transmission is feedback information and SL transmission type that enables feedback, and the SL transmission type is unicast transmission , and the second communication node uses the same resource to transmit feedback information; the second SL transmission is the SL transmission type that enables feedback, and the first communication node does not obtain the feedback message; the first communication node does not obtain the second SL transmission Feedback message, and the first SL transmission does not include retransmission; the first communication node does not obtain the feedback message of the second SL transmission, and the first SL transmission is performed in a time window after the detection duration corresponding to the second SL transmission transmission.
- the channel access device provided in this embodiment is set to implement the channel access method applied to the first communication node in the embodiment shown in FIG. 3 .
- the implementation principle and technical effect of the channel access device provided in this embodiment are similar. Let me repeat.
- FIG. 6 is a structural block diagram of another channel access device provided in an embodiment of the present application. This embodiment is applied to the second communication node. As shown in FIG. 6 , this embodiment includes: a transmitter 610 .
- the sender 610 is configured to send the feedback information and the SL transmission type of the second SL transmission corresponding to the first SL transmission to the first communication node, so that the first communication node determines the first SL transmission according to the feedback information and the SL transmission type A contention window adjustment strategy, and adjusting the contention window corresponding to the first SL transmission according to the contention window adjustment strategy, so that the first communication node performs channel access according to the contention window; wherein, the second SL transmission is adopted before the first SL transmission The transmission performed within the channel occupation time acquired by the first channel access type.
- the channel access device provided in this embodiment is configured to implement the channel access method applied to the second communication node in the embodiment shown in FIG. 4 .
- the implementation principle and technical effect of the channel access device provided in this embodiment are similar. Let me repeat.
- FIG. 7 is a schematic structural diagram of a channel access device provided in an embodiment of the present application.
- the device provided by this application includes: a processor 710 , a memory 720 and a communication module 730 .
- the number of processors 710 in the device may be one or more, and one processor 710 is taken as an example in FIG. 7 .
- the number of storage 720 in the device may be one or more, and one storage 720 is taken as an example in FIG. 7 .
- the processor 710, the memory 720, and the communication module 730 of the device may be connected through a bus or in other ways, and connection through a bus is taken as an example in FIG. 7 .
- the device may be a terminal side (for example, user equipment).
- the memory 720 can be configured to store software programs, computer-executable programs and modules, such as program instructions/modules corresponding to the equipment in any embodiment of the present application (for example, the acquisition module in the channel access device 510, determination module 520 and adjustment module 530).
- the memory 720 may include a program storage area and a data storage area, wherein the program storage area may store an operating system and an application program required by at least one function; the data storage area may store data created according to usage of the device, and the like.
- the memory 720 may include a high-speed random access memory, and may also include a non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other non-volatile solid-state storage devices.
- memory 720 may include memory located remotely from processor 710, which remote memory may be connected to the device via a network. Examples of the aforementioned networks include, but are not limited to, the Internet, intranets, local area networks, mobile communication networks, and combinations thereof.
- the communication module 730 is configured to communicate and interact with other synchronization nodes.
- the channel access device is the first communication node
- the device provided above may be configured to execute the channel access method applied to the first communication node provided in any of the above embodiments, and have corresponding functions and effects.
- the channel access device is the second communication node
- the device provided above may be configured to execute the channel access method applied to the second communication node provided in any of the above embodiments, and have corresponding functions and effects.
- the embodiment of the present application also provides a storage medium containing computer-executable instructions.
- the computer-executable instructions When executed by a computer processor, the computer-executable instructions are used to execute a channel access method applied to a first communication node.
- the method includes: obtaining Feedback information and SL transmission type of the second SL transmission corresponding to the first side link SL transmission, wherein the second SL transmission is performed within the channel occupation time acquired by using the first channel access type before the first SL transmission Transmission; determine the contention window adjustment strategy for the first SL transmission according to the feedback information and the SL transmission type; adjust the contention window corresponding to the first SL transmission according to the contention window adjustment strategy, so that the first communication node performs channel access according to the contention window.
- the embodiment of the present application also provides a storage medium containing computer-executable instructions.
- the computer-executable instructions When executed by a computer processor, the computer-executable instructions are used to execute a channel access method applied to a second communication node.
- the method includes: The first communication node sends the feedback information and SL transmission type of the second SL transmission corresponding to the first SL transmission, so that the first communication node determines the contention window adjustment policy of the first SL transmission according to the feedback information and the SL transmission type, and according to The contention window adjustment strategy adjusts the contention window corresponding to the first SL transmission, so that the first communication node performs channel access according to the contention window; wherein, the second SL transmission is obtained by using the first channel access type before the first SL transmission transmissions during the channel occupation time.
- user equipment covers any suitable type of wireless user equipment, such as a mobile phone, a portable data processing device, a portable web browser or a vehicle-mounted mobile station.
- the various embodiments of the present application can be implemented in hardware or special purpose circuits, software, logic or any combination thereof.
- some aspects may be implemented in hardware, while other aspects may be implemented in firmware or software, which may be executed by a controller, microprocessor or other computing device, although the application is not limited thereto.
- Embodiments of the present application may be realized by a data processor of a mobile device executing computer program instructions, for example in a processor entity, or by hardware, or by a combination of software and hardware.
- Computer program instructions may be assembly instructions, Instruction Set Architecture (ISA) instructions, machine instructions, machine-related instructions, microcode, firmware instructions, state setting data, or written in any combination of one or more programming languages source or object code.
- ISA Instruction Set Architecture
- Any logic flow block diagrams in the drawings of the present application may represent program steps, or may represent interconnected logic circuits, modules and functions, or may represent a combination of program steps and logic circuits, modules and functions.
- Computer programs can be stored on memory.
- the memory may be of any type suitable for the local technical environment and may be implemented using any suitable data storage technology, such as but not limited to Read-Only Memory (ROM), Random Access Memory (RAM), Optical Memory devices and systems (Digital Video Disc (DVD) or Compact Disk (CD)), etc.
- Computer readable media may include non-transitory storage media.
- Data processors can be of any type suitable for the local technical environment, such as but not limited to general purpose computers, special purpose computers, microprocessors, digital signal processors (Digital Signal Processing, DSP), application specific integrated circuits (Application Specific Integrated Circuit, ASIC ), programmable logic devices (Field-Programmable Gate Array, FPGA), and processors based on multi-core processor architectures.
- DSP Digital Signal Processing
- ASIC Application Specific Integrated Circuit
- FPGA Field-Programmable Gate Array
- processors based on multi-core processor architectures.
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Abstract
本申请提供一种信道接入方法、设备和存储介质。应用于第一通信节点的信道接入方法包括:获取第一SL传输所对应的第二SL传输的反馈信息和SL传输类型,其中,所述第二SL传输为在所述第一SL传输之前采用第一信道接入类型获取的信道占用时间内进行的传输;根据所述反馈信息和所述SL传输类型确定所述第一SL传输的竞争窗口调整策略;按照所述竞争窗口调整策略调整所述第一SL传输所对应的竞争窗口,以使第一通信节点按照所述竞争窗口进行信道接入。
Description
本申请涉及通信领域,例如涉及一种信道接入方法、设备和存储介质。
边链路(SideLink,SL)通信运行在许可频段或者专用频段上,例如V2X(vehicle to anything)通信可以运行在专门用于车联网的频段上。随着SL通信的发展,在传统的免许可频段(Unlicensed band)上进行SL发送的需求也越来越强烈。在免许可频段进行SL的发送之前,按照相关的频段使用规范,需要进行信道接入过程,一般称之为先听后发(Listen Before Talk,LBT)过程,以避免和其他系统的设备的干扰。对于SL传输来说,数据的传输类型包括单播,广播和组播。因此,针对不同传输类型的SL通信设备,如何调整竞争窗口是一个亟待解决的问题。
发明内容
本申请实施例提供一种信道接入方法,应用于第一通信节点,包括:
获取第一边链路SL传输所对应的第二SL传输的反馈信息和SL传输类型,其中,所述第二SL传输为在所述第一SL传输之前采用第一信道接入类型获取的信道占用时间内进行的传输;根据所述反馈信息和所述SL传输类型确定所述第一SL传输的竞争窗口调整策略;按照所述竞争窗口调整策略调整所述第一SL传输所对应的竞争窗口,以使第一通信节点按照所述竞争窗口进行信道接入。
本申请实施例提供一种信道接入方法,应用于第二通信节点,包括:
向第一通信节点发送第一SL传输所对应的第二SL传输的反馈信息和SL传输类型,以使第一通信节点根据所述反馈信息和所述SL传输类型确定所述第一SL传输的竞争窗口调整策略,以及按照所述竞争窗口调整策略调整所述第一SL传输所对应的竞争窗口,以使第一通信节点按照所述竞争窗口进行信道接入;其中,所述第二SL传输为在所述第一SL传输之前采用第一信道接入类型获取的信道占用时间内进行的传输。
本申请实施例提供一种信道接入设备,包括:通信模块,存储器,以及一个或多个处理器;所述通信模块,配置为与其它通信节点之间进行通信交互;所述存储器,配置为存储一个或多个程序;当所述一个或多个程序被所述一个 或多个处理器执行,使得所述一个或多个处理器实现上述任一实施例所述的方法。
本申请实施例提供一种存储介质,所述存储介质存储有计算机程序,所述计算机程序被处理器执行时实现上述任一实施例所述的方法。
图1是本申请实施例提供的一种LBT时长的配置示意图;
图2是本申请实施例提供的一种第一SL传输和第二SL传输之间先后关系的示意图;
图3是本申请实施例提供的一种信道接入方法的流程图;
图4是本申请实施例提供的另一种信道接入方法的流程图;
图5是本申请实施例提供的一种信道接入装置的结构框图;
图6是本申请实施例提供的另一种信道接入装置的结构框图;
图7是本申请实施例提供的一种信道接入设备的结构示意图。
下文中将结合附图对本申请的实施例进行说明。以下结合实施例附图对本申请进行描述,所举实例仅用于解释本申请,并非用于限定本申请的范围。
直连通信也可以称之为SL通信,后续以SL通信代指所有的直接通信。SL通信可以运行在许可频段或者专用频段上,例如V2X通信可以运行在专门用于车联网的频段上,随着SL通信的发展,在传统的免许可频段进行SL的发送的需求也越来越强烈。在免许可频段内进行SL发送之前,按照相关的频段使用规范,需要进行信道接入过程,一般称之为LBT过程,以避免和其他系统的设备的干扰,一般的,若在LBT过程对应的检测时长内检信道资源被判定为空闲(LBT成功),用户设备(User Equipment,UE)可以继续发送,否则,UE需要放弃传输。NR-U(New Radio on Unlicensed band)定义了多种LBT过程(也可以称为信道接入过程,channel access procedure),以适用于不同的场景,该过程在进行发送之前进行的LBT的时长(duration)可以是一个定值(第二信道接入类型,type 2),还可以是一个随机值(第一信道接入类型,type 1)。例如,对于第一信道接入类型,与LBT时长可以为随机数,与该随机数(设为N)相关的一个参数为竞争窗口(Contention Window,CW)。其中,LBT时长的随机数N一般初始化为[0,CW]之间的一个随机数,CW的值并不是固定不变的,不同的传输情况,不同的信道接入优先级都可能对应不同的竞争窗口。
一般的LBT过程(也可称为信道接入过程)发生在设备(可以是基站或终端)进行传输之前,其长度在时间上的跨度可以称之为LBT时长(该时长可以包括一个或多个探测时隙sensing slots)。图1是本申请实施例提供的一种LBT时长的配置示意图。如图1所示,在LBT时长内信道被确定为空闲(idle)的情况下,该设备可以进行发送。
对于LBT的时长(duration)是一个随机值的情况(第一信道接入类型,type1),信道接入可以分为不同的信道接入优先级等级(Channel Access Priority Class,CAPC),而不同的CAPC对应的竞争窗口也可以不同,可以将CW
p记为CAPC为p的信道接入对应的竞争窗口,CW
p可以使用的最小值记为CW
p,min,其可以使用的最大值记为CW
p,max。举个例子,LBT时长越长,则代表接入信道需要检测的时长更长,而对于type 1接入的LBT时长,对于一次优先级为p的接入过程,其LBT一般初始化为T
d+N*T
s1,其中,T
d为退避时长,N为随机整数值,T
s1为一个LBT探测时隙的时长(一般为9us),其符合[0,CW
p]之间的均匀分布,竞争窗越大,对应的LBT时长会以更大的概率越长。
在SL通信系统中,设备之间有业务需要传输时,设备之间的业务数据不经过其他网络设备的转发,而是直接由数据源设备传输给目标设备,即设备间的直接通信。SL通信有多种传输类型(cast type):
单播(unicast):针对单播,只有特定的一个设备为接收端,接收端对接收的数据进行反馈,其中,反馈可以是ACK或NACK反馈,即接收端接收正确时,反馈ACK;接收错误时反馈NACK。
组播(groupcast):针对组播,只有特定的一组设备为接收端,接收端对接收的数据进行反馈
组播类型1(即第一组播类型):反馈只有非确认(Non-Acknowledgement,NACK)反馈,即在接收端接收正确的情况下,不进行反馈;在接收错误的情况下,反馈NACK信息。在一种实例中,发送端采用同一资源接收所有接收端的反馈信息。例如,所有接收端在获取反馈资源时使用相同的参数,例如使用相同的组成员号(member ID),这样所有的接收端获取的反馈资源是相同的。
组播类型2(即第二组播类型):反馈可以是确认(Acknowledgement,ACK)或NACK反馈,即在接收到接收正确时,反馈ACK信息;在接收错误的情况下,反馈NACK信息。在一种实施例中,发送端采用同一资源接收接收端的ACK反馈信息,发送端采用另一资源接收接收端的NACK反馈信息。例如,所有接收端在获取ACK反馈资源时使用一组相同的参数,获取NACK反馈资源时使用另一组相同的参数,例如所有接收端使用相同的组成员号x(member ID)获取ACK资源,所有接收端使用相同的组成员号y(member ID)获取ACK资源,这样所有的接收端获取的ACK或NACK反馈资源是相同的。
组播类型3(即第三组播类型):反馈可以是ACK或NACK反馈,即在接收端接收正确的情况下,反馈ACK信息;在接收错误的情况下,反馈NACK信息。并且,发送端在接收不同接收端的反馈信息时,采用各自的资源进行接收。例如,接收端在获取反馈资源时使用其对应的一组参数,例如一个接收端使用自己的组成员号获取反馈资源,组成员号可以由高层配置。通过配置不同的组成员号,这样各个接收端获取的反馈资源可以是不同的或者正交的。
广播(broadcast):针对广播,所有周边的UE都可以是接收端,接收端不对接收的数据进行反馈,即没有ACK或NACK反馈。另外,对于组播和单播,还可以去使能反馈,即组播和单播的接收端不进行反馈。
对于SL传输来说,数据传输类型包括单播,广播和组播,针对SL通信设计特有的确定或调整竞争窗口的方法,本申请用于解决在免许可频段内进行通信的设备的信道接入问题,包括针对不同情况下不同传输类型(单播,组播,广播)的竞争窗口调整的方法。
在本申请实施例中,根据第一SL传输之前的一个或多个第二SL传输的反馈信息和SL传输类型,确定第一SL传输所对应的竞争窗口调整策略。图2是本申请实施例提供的一种第一SL传输和第二SL传输之间先后关系的示意图。如图2所示,第二SL传输位于第一SL传输之前。
在一种实例中,UE在发送SL信号之前执行上述第一信道接入类型(例如使用type 1 channel access),称之为第一SL传输,如图2所示;在一个实例中,第一SL传输的信道接入优先级等级为p。在一个实例中,该UE在第一SL传输之前的一个时机上进行了一个或多个第二SL传输,其中,第二SL传输也可以称之为参考SL传输,一个或多个第二SL传输对应的传输时间段可以称之为参考时长。根据第二SL传输的不同情况,确定第一SL传输所对应的竞争窗口调整策略。
在一种实例中,第二SL传输为UE使用第一信道接入类型获取的信道占用时间内进行的传输。在一种实例中,第二SL传输的优先级可以与第一SL传输的优先级相同。在一种实例中,第二SL传输为UE使用第一信道接入类型获取的信道占用时间内进行的最近一次传输,或者,获取的信道占用时间内进行的首次传输,或者,获取的信道占用时间内进行的多次传输。
在一种实例中,第二SL传输为使能了混合自动重传请求(Hybrid Automatic Repeat reQuest,HARQ)反馈的SL传输。在一种实例中,第二SL传输可以对应一种HARQ反馈的类型或者传输类型(cast type);例如可以为使能了HARQ反馈的SL单播(HARQ反馈类型为单播ACK/NACK),SL组播类型1(HARQ反馈类型为组播NACK only),或者SL组播类型2(HARQ反馈类型为组播ACK/NACK)。
在一种实例中,根据第二SL传输的反馈信息或传输类型(cast type)确定第二SL传输的反馈成功率;在一种实例中,确定第二SL传输的反馈成功率是否满足要求,进而根据第二SL传输的反馈成功率是否满足要求调整第一SL传输所对应的竞争窗口。
在一实施例中,图3是本申请实施例提供的一种信道接入方法的流程图。本实施例可以由第一通信节点执行。其中,第一通信节点可以为终端侧(比如,用户设备)。如图3所示,本实施例包括:S310-S330。
S310、获取第一SL传输所对应的第二SL传输的反馈信息和SL传输类型。
第二SL传输为在第一SL传输之前采用第一信道接入类型获取的信道占用时间内进行的传输。在实施例中,反馈信息用于表征第二通信节点是否成功接收第一通信节点发送的业务数据。在实际通信过程中,反馈信息至少包括下述之一:ACK信息;NACK信息。在第二通信节点成功接收业务数据的情况下,第二通信节点向第一通信节点反馈ACK信息;在第二通信节点未成功接收业务数据的情况下,第二通信节点向第一通信节点反馈NACK信息。其中,第二通信节点指的是业务数据的接收端,第一通信节点为业务数据的发送端。在实施例中,SL传输类型包括:单播、组播和广播。在实际操作过程中,由于在广播的场景下,作为接收端的第二通信节点不会对接收到的业务数据进行反馈,即没有ACK信息或NACK信息的反馈,则对SL传输类型包括单播和组播进行说明。
S320、根据反馈信息和SL传输类型确定第一SL传输的竞争窗口调整策略。
竞争窗口调整策略用于对第一SL传输所对应竞争窗口的长度值进行调整的策略。在一实施例中,竞争窗口调整策略包括下述之一:第一调整策略;第二调整策略;第三调整策略;其中,第一调整策略用于将竞争窗口的窗口长度值调整为允许的最小值或为允许的下一个更小窗口长度值;第二调整策略用于将竞争窗口的窗口长度值调整为下一个允许的更大窗口长度值;第三调整策略用于使竞争窗口的窗口长度值保持不变。在实施例中,第一调整策略可以为将第一SL传输所对应的竞争窗口的窗口长度值进行减少的操作;第二调整策略可以为将第一SL传输所对应的竞争窗口的窗口长度值进行增大的操作;第三调整策略可以为第一SL传输所对应的竞争窗口的窗口长度值保持不变的操作。
S330、按照竞争窗口调整策略调整第一SL传输所对应的竞争窗口,以使第一通信节点按照竞争窗口进行信道接入。
在实施例中,在根据第二SL传输的反馈信息和SL传输类型确定第一SL传输的竞争窗口调整策略之后,按照竞争窗口调整策略调整第一SL传输所对应竞争窗口的窗口长度值,以使第一通信节点按照调整之后的竞争窗口在免许可频段内进行信道接入,从而保证了竞争窗口的充分利用,以及提高了第一SL传 输的信道接入效率。
在一实施例中,第二SL传输为在第一SL传输之前采用第一信道接入类型获取的信道占用时间内进行的传输,包括下述之一:第二SL传输为获取的信道占用时间内进行的最近一次传输;第二SL传输为获取的信道占用时间内进行的首次传输;第二SL传输为获取的信道占用时间内进行的多次传输。在实施例中,在第二SL传输为获取的信道占用时间内进行的多次传输的情况下,第一通信节点可以根据所有第二SL传输所对应竞争窗口的窗口长度值进行平均,并根据平均值确定第一SL传输的竞争窗口调整策略。
在一实施例中,根据反馈信息和SL传输类型确定第一SL传输的竞争窗口调整策略,包括:根据第二SL传输在SL传输类型下的反馈信息确定第二SL传输的反馈成功率;根据反馈成功率和预设反馈成功率阈值确定第一SL传输的竞争窗口调整策略。在实施例中,第二SL传输的反馈成功率可以采用反馈信息为ACK信息的第二SL传输的数量进行表征;预设反馈成功率阈值用于表征是否满足成功率要求。若反馈成功率达到预设反馈成功率阈值,则第一通信节点满足成功率要求;若反馈成功率未达到预设反馈成功率阈值,则第一通信节点未满足成功率要求。
在一实施例中,根据第二SL传输在SL传输类型下的反馈信息确定第二SL传输的反馈成功率,包括:确定第二SL传输为单播传输类型,并确定反馈信息为ACK信息的第二SL传输的数量;根据反馈信息为ACK信息的第二SL传输的数量确定第二SL传输的反馈成功率。在实施例中,一个第二SL传输携带一个传输块,并且,一个传输块对应一个反馈信息。反馈信息为ACK信息的第二SL传输的数量,也可以为反馈信息为ACK信息的传输块的数量。
在一实施例中,每个第二SL传输包括至少一个数据块,每个数据块对应一个反馈信息,且SL传输类型为单播传输,根据第二SL传输在SL传输类型下的反馈信息确定第二SL传输的反馈成功率,包括:确定第二SL传输在单播传输下反馈信息为ACK信息的数据块数量;根据ACK信息的数据块数量确定第二SL传输的反馈成功率。在实施例中,每个第二SL传输可以包括一个或多个数据块,并且,每个数据块对应一个反馈信息,即一个第二SL传输可以对应多个反馈信息。在实施例中,ACK信息的数据块数量大于或等于反馈信息为ACK信息所对应第二SL传输的数量。在实施例中,对SL传输类型为单播,且反馈信息可以包含ACK信息和NACK信息的情况下,确定第二SL传输的反馈成功率。
在一实施例中,根据反馈成功率和预设反馈成功率阈值确定第一SL传输的竞争窗口调整策略,包括下述之一:
第二SL传输的反馈成功率达到预设反馈成功率阈值,按照第一调整策略调 整每个信道接入优先级等级所对应的竞争窗口;第二SL传输的反馈成功率达到预设反馈成功率阈值,按照第一调整策略调整第一SL传输所对应信道接入优先级等级对应的竞争窗口;第二SL传输的反馈成功率未达到预设反馈成功率阈值,按照第二调整策略调整每个信道接入优先级等级所对应的竞争窗口;第二SL传输的反馈成功率未达到预设反馈成功率阈值,按照第二调整策略调整第一SL传输所对应信道接入优先级等级对应的竞争窗口。
在实施例中,按照第一调整策略或第二调整策略调整每个信道接入优先级等级所对应的竞争窗口,也包括按照第一调整策略或第二调整策略调整第一SL传输所对应信道接入优先级等级锁对应的竞争窗口。在实施例中,在第二SL传输的反馈成功率达到预设反馈成功率阈值的情况下,表明第二SL传输当前所对应竞争窗口的窗口长度值稍微大,可以适当地调小,即按照第一调整策略调整每个信道接入优先级等级所对应的竞争窗口,或者,调整第一SL传输所对应信道接入优先级等级对应的竞争窗口;在第二SL传输的反馈成功率未达到预设反馈成功率阈值的情况下,表明第二SL传输当前所对应竞争窗口的敞口长度值稍微小,可以适当地调大,即按照第二调整策略调整每个信道接入优先级等级所对应的竞争窗口,或者,调整第一SL传输所对应信道接入优先级等级对应的竞争窗口。
在一实施例中,根据第二SL传输在SL传输类型下的反馈信息确定第二SL传输的反馈成功率,包括:确定第二SL传输为反馈信息为NACK信息的第一组播类型,确定组播传输下反馈信息的数量,或者,确定是否检测到组播传输下的反馈信息;根据反馈信息的数量或是否检测到反馈信息确定第二SL传输的反馈成功率。其中,第一组播类型指的是SL传输类型为组播,且反馈信息包括采用同一个资源反馈的NACK信息。在实施例中,根据组播传输下反馈信息的数量,或者,是否检测到组播传输下的反馈信息确定第二SL传输的反馈成功率。
在一实施例中,根据反馈成功率和预设反馈成功率阈值确定第一SL传输的竞争窗口调整策略,包括下述之一:
第二SL传输的反馈成功率达到预设反馈成功率阈值,按照第一调整策略调整每个信道接入优先级等级所对应的竞争窗口,或者按照第一调整策略调整第一SL传输所对应信道接入优先级等级对应的竞争窗口;第二SL传输的反馈成功率未达到预设反馈成功率阈值,按照第二调整策略调整每个信道接入优先级等级所对应的竞争窗口,或者按照第二调整策略调整第一SL传输所对应信道接入优先级等级对应的竞争窗口。
在实施例中,第一组播类型为只对NACK信息进行反馈的组播类型。在第二SL传输未检测到反馈信息的情况下,表明第二SL传输的反馈成功率达到预设反馈成功率阈值。在实施例中,在第二SL传输的反馈成功率达到预设反馈成 功率阈值的情况下,可以按照第一调整策略或第二调整策略调整第一SL传输所对应信道接入优先级等级对应的竞争窗口,即减少或增大第一SL传输所对应信道接入优先级等级锁对应的竞争窗口的窗口长度值。
在一实施例中,根据反馈成功率和预设反馈成功率阈值确定第一SL传输的竞争窗口调整策略,包括下述之一:
第二SL传输的反馈成功率达到预设反馈成功率阈值时,按照第三调整策略调整每个信道接入优先级等级所对应的竞争窗口,或者按照第三调整策略调整第一SL传输所对应信道接入优先级等级对应的竞争窗口;第二SL传输的反馈成功率未达到预设反馈成功率阈值,按照第二调整策略调整每个信道接入优先级等级所对应的竞争窗口,或者按照第二调整策略调整第一SL传输所对应信道接入优先级等级对应的竞争窗口。在实施例中,第一组播类型为只对NACK信息进行反馈的组播类型。在第二SL传输未检测到反馈信息的情况下,表明第二SL传输的反馈成功率达到预设反馈成功率阈值。在实施例中,在第二SL传输的反馈成功率达到预设反馈成功率阈值的情况下,可以按照第二调整策略或第三调整策略调整第一SL传输所对应信道接入优先级等级对应的竞争窗口,即增大或保持第一SL传输所对应信道接入优先级等级锁对应的竞争窗口的窗口长度值。
在一实施例中,根据反馈成功率和预设反馈成功率阈值确定第一SL传输的竞争窗口调整策略,包括下述之一:
第二SL传输的反馈成功率达到预设反馈成功率阈值时,按照第一调整策略调整每个信道接入优先级等级所对应的竞争窗口,或者按照第一调整策略调整第一SL传输所对应信道接入优先级等级对应的竞争窗口;第二SL传输的反馈成功率未达到预设反馈成功率阈值,按照第三调整策略调整每个信道接入优先级等级所对应的竞争窗口,或者按照第三调整策略调整第一SL传输所对应信道接入优先级等级对应的竞争窗口。在实施例中,第一组播类型为只对NACK信息进行反馈的组播类型。在第二SL传输未检测到反馈信息的情况下,表明第二SL传输的反馈成功率达到预设反馈成功率阈值。在实施例中,在第二SL传输的反馈成功率达到预设反馈成功率阈值的情况下,可以按照第一调整策略或第三调整策略调整第一SL传输所对应信道接入优先级等级对应的竞争窗口,即减少或保持第一SL传输所对应信道接入优先级等级锁对应的竞争窗口的窗口长度值。
在一实施例中,第二SL传输采用反馈信息为ACK信息或NACK信息的第二组播类型;根据反馈信息和SL传输类型确定第一SL传输的竞争窗口调整策略,包括下述之一:
第一通信节点至少接收到ACK信息,按照第一调整策略调整每个信道接入 优先级等级所对应的竞争窗口,或者按照第一调整策略调整第一SL传输所对应信道接入优先级等级对应的竞争窗口;第一通信节点未接收到ACK信息,按照第二调整策略调整每个信道接入优先级等级所对应的竞争窗口,或者按照第二调整策略调整第一SL传输所对应信道接入优先级等级对应的竞争窗口。在实施例中,在第二SL传输采用第二组播类型的情况下,若第二SL传输的反馈信息为只接收到ACK信息,或者,接收到了ACK信息和NACK信息,则按照第一调整策略调整每个信道接入优先级等级所对应的竞争窗口,或者按照第一调整策略调整第一SL传输所对应信道接入优先级等级对应的竞争窗口;若第二SL传输的反馈信息为只接收到NACK信息,或者,未接收到反馈信息,则按照第二调整策略调整每个信道接入优先级等级所对应的竞争窗口,或者按照第二调整策略调整第一SL传输所对应信道接入优先级等级对应的竞争窗口。
在一实施例中,第二SL传输采用第二组播类型;其中,第二组播类型为采用同一个资源反馈ACK信息或NACK信息。
根据反馈信息和SL传输类型确定第一SL传输的竞争窗口调整策略,包括下述之一:
第一通信节点仅接收到ACK消息,按照第一调整策略调整每个信道接入优先级等级所对应的竞争窗口,或者按照第一调整策略调整第一SL传输所对应信道接入优先级等级对应的竞争窗口;第一通信节点接收到ACK信息和NACK信息,按照第三调整策略调整每个信道接入优先级等级所对应的竞争窗口,或者按照第三调整策略调整第一SL传输所对应信道接入优先级等级对应的竞争窗口;第一通信节点未接收到ACK信息,按照第二调整策略调整每个信道接入优先级等级所对应的竞争窗口,或者按照第二调整策略调整第一SL传输所对应信道接入优先级等级对应的竞争窗口。在实施例中,在第二SL传输采用第二组播类型的情况下,若第二SL传输的反馈信息为只接收到ACK信息,则按照第一调整策略调整每个信道接入优先级等级所对应的竞争窗口,或者按照第一调整策略调整第一SL传输所对应信道接入优先级等级对应的竞争窗口;若第二SL传输的反馈信息为接收到ACK信息和NACK信息,则按照第三调整策略调整每个信道接入优先级等级所对应的竞争窗口,或者按照第三调整策略调整第一SL传输所对应信道接入优先级等级对应的竞争窗口;若第二SL传输的反馈信息为只接收到NACK信息,或者,未接收到反馈信息,则按照第二调整策略调整每个信道接入优先级等级所对应的竞争窗口,或者按照第二调整策略调整第一SL传输所对应信道接入优先级等级对应的竞争窗口。
在一实施例中,第二SL传输采用第二组播类型;其中,第二组播类型为采用同一个资源反馈ACK信息或NACK信息;根据反馈信息和SL传输类型确定第一SL传输的竞争窗口调整策略,包括下述之一:
第一通信节点仅接收到ACK信息,按照第一调整策略调整每个信道接入优先级等级所对应的竞争窗口,或者按照第一调整策略调整第一SL传输所对应信道接入优先级等级对应的竞争窗口;第一通信节点仅接收到NACK信息,同时接收到ACK信息和NACK信息,或者,未接收到反馈消息,按照第二调整策略调整每个信道接入优先级等级所对应的竞争窗口,或者按照第二调整策略调整第一SL传输所对应信道接入优先级等级对应的竞争窗口。在实施例中,在第二SL传输采用第二组播类型的情况下,若第二SL传输的反馈信息为只接收到ACK信息,则按照第一调整策略调整每个信道接入优先级等级所对应的竞争窗口,或者按照第一调整策略调整第一SL传输所对应信道接入优先级等级对应的竞争窗口;若第二SL传输的反馈信息为只接收到NACK信息,同时接收到ACK信息和NACK信息,或者,未接收到反馈消息,按照第二调整策略调整每个信道接入优先级等级所对应的竞争窗口,或者按照第二调整策略调整第一SL传输所对应信道接入优先级等级对应的竞争窗口。
在一实施例中,第二SL传输采用第三组播类型;其中,第三组播类型的第二通信节点采用对应的资源反馈ACK信息或NACK信息;根据反馈信息和SL传输类型确定第一SL传输的竞争窗口调整策略,包括:
确定第二SL传输在组播传输下反馈信息为ACK信息的数量、ACK信息的比例、ACK信息所对应第二通信节点的数量或ACK信息所对应第二通信节点的比例;根据ACK信息的数量、ACK信息的比例、ACK信息所对应第二通信节点的数量或ACK信息所对应第二通信节点的比例确定第一SL传输的竞争窗口调整策略。在实施例中,在第二SL传输的SL传输类型为组播,且每个第二通信节点采用对应资源反馈ACK信息或NACK信息的情况下,第一通信节点可以准确地确定反馈ACK信息的第二通信节点的数量,以及反馈NACK信息的第二通信节点的数量。其中,ACK信息的数量与ACK信息所对应第二通信节点的数量相同,ACK信息的比例与ACK信息所对应第二通信节点的比例相同。
在一实施例中,根据ACK信息或ACK信息所对应第二通信节点的数量确定第一SL传输的竞争窗口调整策略,包括下述之一:
ACK信息或ACK信息所对应第二通信节点的数量大于或等于第一门限值,按照第一调整策略调整每个信道接入优先级等级所对应的竞争窗口,或者按照第一调整策略调整第一SL传输所对应信道接入优先级等级对应的竞争窗口;ACK信息或ACK信息所对应第二通信节点的数量小于第二门限值,按照第二调整策略调整每个信道接入优先级等级所对应的竞争窗口,或者按照第一调整策略调整第二SL传输所对应信道接入优先级等级对应的竞争窗口;其中,第一门限值大于或等于第二门限值。在实施例中,在ACK信息或ACK信息所对应 第二通信节点的数量大于第一门限值的情况下,表明第二SL传输所对应竞争窗口的窗口长度值稍微大,可是适当地减少窗口长度值,即按照第一调整策略调整每个信道接入优先级等级所对应的竞争窗口,或者按照第一调整策略调整第一SL传输所对应信道接入优先级等级对应的竞争窗口。相应的,在ACK信息或ACK信息所对应第二通信节点的数量小于第二门限值的情况下,表明第二SL传输所对应竞争窗口的窗口长度值稍微小,可是适当地增大窗口长度值,即按照第二调整策略调整每个信道接入优先级等级所对应的竞争窗口,或者按照第二调整策略调整第一SL传输所对应信道接入优先级等级对应的竞争窗口。在一实施例中,第一门限值可以与第二门限值相同,也可以大于第二门限值。示例性地,第一门限值和第二门限值为大于1小于第二通信节点的总数量减1的整数。示例性地,第一门限值和第二门限值也可以为1,或者,第二通信节点的总数量减1的正整数。
在一实施例中,根据ACK信息或ACK信息所对应第二通信节点的比例确定第一SL传输的竞争窗口调整策略,包括下述之一:
ACK信息或ACK信息所对应第二通信节点的比例大于或等于第三门限值,按照第一调整策略调整每个信道接入优先级等级所对应的竞争窗口,或者按照第一调整策略调整第一SL传输所对应信道接入优先级等级对应的竞争窗口;ACK信息或ACK信息所对应第二通信节点的比例小于第四门限值,按照第二调整策略调整每个信道接入优先级等级所对应的竞争窗口,或者按照第二调整策略调整第一SL传输所对应信道接入优先级等级对应的竞争窗口;其中,第三门限值大于或等于第四门限值。在实施例中,在ACK信息或ACK信息所对应第二通信节点的比例大于第三门限值的情况下,表明第二SL传输所对应竞争窗口的窗口长度值稍微大,可是适当地减少窗口长度值,即按照第一调整策略调整每个信道接入优先级等级所对应的竞争窗口,或者按照第一调整策略调整第一SL传输所对应信道接入优先级等级对应的竞争窗口。相应的,在ACK信息或ACK信息所对应第二通信节点的比例小于第四门限值的情况下,表明第二SL传输所对应竞争窗口的窗口长度值稍微小,可是适当地增大窗口长度值,即按照第二调整策略调整每个信道接入优先级等级所对应的竞争窗口,或者按照第二调整策略调整第一SL传输所对应信道接入优先级等级对应的竞争窗口。在一实施例中,第三门限值可以与第四门限值相同,也可以大于第四门限值。示例性地,第三门限值和第四门限值为0至1的实数。比如,第三门限值或第四门限值可以为10%,也可以为100%。
在一实施例中,反馈信息和SL传输类型满足预设反馈条件;根据反馈信息和SL传输类型确定第一SL传输的竞争窗口调整策略,包括:
按照第三调整策略调整每个信道接入优先级等级所对应的竞争窗口,或者 按照第三调整策略调整第一SL传输所对应信道接入优先级等级对应的竞争窗口。在实施例中,若第二SL传输为使能反馈的第一组播类型,第一通信节点可以按照第三调整策略调整每个信道接入优先级等级所对应的竞争窗口,或者按照第三调整策略调整第一SL传输所对应信道接入优先级等级对应的竞争窗口。
在一实施例中,反馈信息和SL传输类型满足预设反馈条件;根据反馈信息和SL传输类型确定第一SL传输的竞争窗口调整策略,包括:
确定第一通信节点所在信道的当前忙闲程度;根据当前忙闲程度确定第一SL传输的竞争窗口调整策略。在实施例中,信道的当前忙闲程度可以为0至1的数值。在实施例中,第一通信节点根据测量得到的当前忙闲程度,选取对应信道接入优先级等级的竞争窗口目标长度,然后按照该竞争窗口目标长度确定第一SL传输的竞争窗口调整策略,并按照竞争窗口调整策略调整第一SL传输的竞争窗口当前长度。
在一实施例中,根据当前忙闲程度确定第一SL传输的竞争窗口调整策略,包括:
根据当前忙闲程度和第一SL传输所对应的信道接入优先级等级确定第一SL传输对应的竞争窗口目标长度;按照竞争窗口目标长度调整第一SL传输对应的竞争窗口。
在一实施例中,根据当前忙闲程度确定第一SL传输的竞争窗口调整策略,包括:
当前忙闲程度大于或等于第一忙闲程度阈值,按照第二调整策略调整每个信道接入优先级等级所对应的竞争窗口,或者按照第二调整策略调整第一SL传输所对应信道接入优先级等级对应的竞争窗口;当前忙闲程度小于第二忙闲程度阈值,按照第一调整策略调整每个信道接入优先级等级所对应的竞争窗口,或者按照第一调整策略调整第一SL传输所对应信道接入优先级等级对应的竞争窗口;当前忙闲程度大于第二忙闲程度阈值且小于第一忙闲程度阈值,按照第三调整策略调整每个信道接入优先级等级所对应的竞争窗口,或者按照第三调整策略调整第一SL传输所对应信道接入优先级等级对应的竞争窗口;其中,第一忙闲程度阈值大于或等于第二忙闲程度阈值。在实施例中,第一忙闲程度阈值和第二忙闲程度阈值可以为一个相同的值,也可以为不相同的值,对此并不进行限定,可根据实际情况进行设定。
在一实施例中,预设反馈条件包括下述之一:
第二SL传输为未使能反馈的反馈信息;第一SL传输为未使能反馈的反馈信息;第一SL传输为使能反馈的反馈信息和SL传输类型,且SL传输类型为单播传输,以及第二通信节点采用同一个资源传输反馈信息;第二SL传输为使能反馈的SL传输类型,且第一通信节点未获取到反馈消息;第一通信节点未获 取到第二SL传输的反馈消息,且第一SL传输未包括重传;第一通信节点未获取到第二SL传输的反馈消息,且第一SL传输为在第二SL传输所对应探测时长之后的一个时间窗进行的传输。
在一实施例中,图4是本申请实施例提供的另一种信道接入方法的流程图。本实施例应用于第二通信节点。其中,第二通信节点可以为终端(比如,用户设备)。如图4所示,本实施例中的信道接入方法包括S210。
S410、向第一通信节点发送第一SL传输所对应的第二SL传输的反馈信息和SL传输类型,以使第一通信节点根据反馈信息和SL传输类型确定第一SL传输的竞争窗口调整策略,以及按照竞争窗口调整策略调整第一SL传输所对应的竞争窗口,以使第一通信节点按照竞争窗口进行信道接入;其中,第二SL传输为在第一SL传输之前采用第一信道接入类型获取的信道占用时间内进行的传输。
在一实施例中,第二SL传输为在所述第一SL传输之前采用第一信道接入类型获取的信道占用时间内进行的传输,包括下述之一:所述第二SL传输为获取的信道占用时间内进行的最近一次传输;所述第二SL传输为获取的信道占用时间内进行的首次传输;所述第二SL传输为获取的信道占用时间内进行的多次传输。
在一实施例中,竞争窗口调整策略包括下述之一:第一调整策略;第二调整策略;第三调整策略;其中,所述第一调整策略用于将竞争窗口的窗口长度值调整为允许的最小值或为允许的下一个更小窗口长度值;所述第二调整策略用于将竞争窗口的窗口长度值调整为下一个允许的更大窗口长度值;所述第三调整策略用于使竞争窗口的窗口长度值保持不变。
应用于第二通信节点的信道接入方法中各个参数的解释,可参见上述实施例中应用于第一通信节点的信道接入方法中的描述,在此不再赘述。
在一实施例中,以第二SL传输的SL传输类型为使能反馈的单播传输,反馈信息为ACK信息和/或NACK信息为例,对第一SL传输的竞争窗口调整策略的确定过程进行说明。在实施例中,第二SL传输的HARQ反馈信息为ACK信息和/或NACK信息,且SL传输类型(cast type)为使能反馈的单播传输,确定第二SL传输的HARQ反馈成功率并判断该成功率是否满足要求,包括如下实例:
一种实例中,每个第二SL传输对应一个HARQ反馈信息,即采用基于SL传输块的HARQ反馈,如果至少一个第二SL传输对应的HARQ反馈信息为ACK信息,则判定正确率满足要求。其中,满足要求指的是达到预设反馈成功率阈值。
一种实例中,一个或多个第二SL传输中的每一个第二SL传输均可以包括至少一个数据块,每个数据块都对应各自的HARQ反馈信息,即采用基于数据块的HARQ反馈信息,此时HARQ反馈信息为ACK信息的数据块的数量或者比例大于或等于门限T,则判定正确率满足要求。在一种实例中,数据块为一个CB(code block),一个CBG(code block group),或一个数据单元(data unit)。
在一种实例中,若判定正确率满足要求(即达到预设反馈成功率阈值),UE按照第一调整策略调整每一个信道接入优先等级所对应的竞争窗口。调整每一个信道接入优先等级所对应竞争窗口也包括调整第一SL传输的CAPC所对应的竞争窗口。在一种实例中,若判定正确率满足要求,UE也可以按照第一调整策略调整第一SL传输的CAPC所对应的竞争窗口。
在一种实例中,若判定正确率不满足要求(即未达到预设反馈成功率阈值),UE按照第二调整策略调整每一个信道接入优先等级所对应的竞争窗口。调整每一个信道接入优先等级所对应的竞争窗口也包括调整第一SL传输的CAPC所对应的竞争窗口。在一种实例中,若判定正确率不满足要求,UE也可以按照第二调整策略调整第一SL传输的CAPC所对应的竞争窗口。
在后续本申请实施例中,UE调整竞争窗口,如果不做特殊说明,则代表UE调整每一个信道接入优先等级所对应的竞争窗口或者调整第一SL传输的CAPC所对应的竞争窗口。在后续申请实施例中,组播也可以包括广播,例如一个广播使能了NACK反馈,也可以称之为组播类型1。
在一实施例中,以第二SL传输的SL传输类型为使能反馈的组播传输,反馈信息为采用同一个资源只反馈NACK信息,第一通信节点为发送UE,以及第二通信节点为接收UE为例,对第一SL传输的竞争窗口调整策略的确定过程进行说明。在实施例中,第二SL传输的HARQ反馈信息为NACK信息,且SL传输类型为使能反馈的第一组播类型,确定第二SL传输的HARQ反馈成功率并判断该成功率是否满足要求,包括如下实例:
在一种实例中,每一个第二SL传输对应一个HARQ反馈信息,且只能反馈NACK信息,如果为ACK信息则不反馈。
对于第一组播类型,发送UE无法准确知晓有多少接收UE进行了反馈,并且,如果接收UE不进行反馈,发送UE无法区分下面几种情况:
情况1:接收UE正确接收了SL传输,不需要反馈。
情况2:接收UE检测到了SL传输,但是接收失败,但是由于没有竞争到信道无法反馈NACK。
情况3:接收UE没有检测到上述SL传输。所以没有进行反馈,即实际上接收UE接收失败。
在实施例中,发送UE会错误的将情况2和情况3判定为接收成功,但是实 际上为接收失败。另外,对于第一组播类型,即使能够检测到NACK信息,发送UE也无法确定是否有接收UE正确接收,而是只能判定有部分UE没有接收正确,至于接收成功UE的数目或者接收成功UE在所有接收UE中所占的比例,发送UE无法获知。
在一种实例中,如果x个第二SL传输,则至少x个第二SL传输对应的HARQ反馈信息为无反馈信息,即未检测到反馈信息,则判定正确率满足要求。在一种实例中,如果第一个或者最后一个第二SL传输对应的HARQ反馈信息为无反馈信息,即未检测到反馈信息,则判定正确率满足要求。
在一种实例中,若判定正确率满足要求,UE按照第一调整策略调整每一个信道接入优先等级所对应的竞争窗口或者调整第一SL传输的CAPC所对应的竞争窗口;否则,UE按照第二调整策略调整每一个信道接入优先等级所对应的竞争窗口或者调整第一SL传输的CAPC所对应的竞争窗口。在该实例中,UE按照类似单播的方式调整竞争窗。
在一种实例中,若判定正确率满足要求,UE按照第三调整策略调整每一个信道接入优先等级所对应的竞争窗口或者调整第一SL传输的CAPC所对应的竞争窗口;否则,UE按照第二调整策略调整每一个信道接入优先等级所对应的竞争窗口或者调整第一SL传输的CAPC所对应的竞争窗口。
在一种实例中,若判定正确率满足要求,UE按照第一调整策略调整每一个信道接入优先等级所对应的竞争窗口或者调整第一SL传输的CAPC所对应的竞争窗口;否则,UE按照第三调整策略调整每一个信道接入优先等级所对应的竞争窗口或者调整第一SL传输的CAPC所对应的竞争窗口。
在一实施例中,以第二SL传输的SL传输类型为使能反馈的组播传输,反馈信息为采用同一个资源反馈ACK信息和NACK信息,第一通信节点为发送UE,以及第二通信节点为接收UE为例,对第一SL传输的竞争窗口调整策略的确定过程进行说明。在实施例中,第二SL传输的HARQ反馈信息为ACK信息和NACK信息,Sl传输类型为使能反馈的第二组播类型,确定第二SL传输的HARQ反馈成功率并判断该成功率是否满足要求,包括如下实例:
一种实例中,每一个第二SL传输对应一个HARQ反馈信息,如果接收错误,则反馈NACK信息;如果接收正确,则反馈ACK信息。在第二组播类型下,可以反馈ACK信息,跟与第一组播类型类似,多个接收UE在同一个资源上反馈ACK信息,或者在同一个资源上反馈NACK信息,发送UE无法区分接收UE。对于第二组播类型,发送UE无法准确知晓有多少接收UE反馈ACK,多少接收UE反馈NACK。另外,发送UE接收到HARQ反馈包括以下情况:
情况1:发送UE只收到ACK信息。
情况2:发送UE只收到NACK信息。
情况3:发送UE收到了ACK信息和NACK信息。
情况4:发送UE没有收到反馈信息。
在一种实例中,第二SL传输的反馈为情况1或者3,即反馈信息至少包括ACK信息,UE按照第一调整策略调整每一个信道接入优先等级所对应的竞争窗口或者调整第一SL传输的CAPC所对应的竞争窗口;否则,UE按照第二调整策略调整竞争窗口。
在一种实例中,第二SL传输的反馈为情况1,UE按照第一调整策略调整每一个信道接入优先等级所对应的竞争窗口或者调整第一SL传输的CAPC所对应的竞争窗口;若为情况3,按照第三调整策略调整竞争窗口;否则,UE按照第二调整策略调整竞争窗口。
在一种实例中,第二SL传输的反馈为情况1,UE按照第一调整策略调整每一个信道接入优先等级所对应的竞争窗口或者调整第一SL传输的CAPC所对应的竞争窗口;否则,UE按照第二调整策略调整竞争窗口。
在一种实例中,上述第二SL传输为一个或多个SL传输中的至少一个,第一个或者最后一个第二SL传输。
在一实施例中,以第二SL传输的SL传输类型为使能反馈的组播传输,反馈信息为采用对应资源反馈ACK信息和NACK信息,第一通信节点为发送UE,以及第二通信节点为接收UE为例,对第一SL传输的竞争窗口调整策略的确定过程进行说明。在实施例中,第二SL传输的HARQ反馈信息为ACK信息和NACK信息,且SL传输类型(cast type)为使能反馈的第三组播类型,确定第二SL传输的HARQ反馈成功率并判断该成功率是否满足要求,包括如下实例:
一种实例中,每一个第二SL传输对应一个HARQ反馈信息,每一个接收UE如果接收错误,则反馈NACK信息;如果接收正确则反馈ACK信息。与第一组播类型和第二组播类型不同,在采用第三组播类型中,每个接收UE在各自的资源上反馈ACK信息,或者反馈NACK信息,发送UE知晓接收UE的总数目m,例如接收UE清楚组成员总个数(group size)为m,那么除去发送UE自身,则接收UE数目为m-1。同样的,发送UE可以通过检测反馈,知晓多少接收UE反馈ACK信息,以及多少接收UE反馈NACK信息。其中,假设检测到的ACK信息的数量为k。
在一种实例中,第二SL传输对应的ACK信息的数量k大于或者等于门限T1,UE按照第一调整策略调整每一个信道接入优先等级所对应的竞争窗口或者调整第一SL传输的CAPC所对应的竞争窗口;否则,UE按照第二调整策略调整竞争窗口。
在一种实例中,第二SL传输对应的ACK信息的比例,即反馈ACK信息的UE占所有组内接收UE的比例,表示为k/(m-1,大于或者等于门限T2,UE按 照第一调整策略调整每一个信道接入优先等级所对应的竞争窗口或者调整第一SL传输的CAPC所对应的竞争窗口;否则,UE按照第二调整策略调整竞争窗口。
在一种实例中,上述门限T1,T2为预定义,配置或预配置的值。例如,一般的T1为1到m-1之间的数,一种特例中,T1也可以为1或m-1;T2一般为0到1之间的数,例如10%,在另一个特例中,T2也可以为100%,即全部接收UE反馈ACK为满足正确率条件。
在一种实例中,上述第二SL传输包括一个或多个SL传输,一个或多个SL传输中的至少一个SL,第一个SL或者最后一个SL。
在一实施例中,第二SL传输的HARQ反馈信息为采用同一个资源反馈NACK信息,且SL传输类型(cast type)为使能反馈的第一组播类型。在一种实例中UE也可以不基于正确率进行竞争窗操作,而是基于下属方法调整竞争窗口:
方式1:在一种实例中,若第二SL传输为使能反馈的第一组播类型,UE按照第三调整策略调整每一个信道接入优先等级所对应的竞争窗口或者调整第一SL传输的CAPC所对应的竞争窗口。即不论是否收到反馈,都使用上次的竞争窗口而不调整竞争窗口。
方式2:在一种实例中,若第二SL传输为使能反馈的第一组播类型,UE判定当前信道的忙闲程度(CBR,channel busy ratio,或者为channel occupied ratio,改值为0到1之间的数数值),根据信道的忙闲程度调整每一个信道接入优先等级所对应的竞争窗口或者调整第一SL传输的CAPC所对应的竞争窗口。
在一种实例中,可以配置或者预配置,不同的信道忙闲程度对应的竞争窗口大小,以CBR为例,如下表1所示:
表1
CAPC 1 | CAPC 2 | CAPC 3 | CAPC 4 | |
CBR<=T1 | CW 1,a1 | CW 2,b1 | CW 3,c1 | CW 4,d1 |
T1<CBR<=T2 | ||||
.... | .... | .... | .... | .... |
CBR>Ti | CW 1,ai | CW 2,bi | CW 3,ci | CW 4,di |
UE根据测量得到的信道忙闲程度,使用表1为各个信道接入优先级选择合适的竞争窗口。
方式3:在一种实例中,若第二SL传输为使能反馈的第一组播类型,包括以下至少之一:
配置或者预配置信道忙闲程度的门限1(即上述实施例中的第一忙闲程度阈值),若信道忙闲程度大于或等于门限1,UE按照第二调整策略调整每一个信道接入优先等级所对应的竞争窗口或者调整第一SL传输的CAPC所对应的竞争窗口。
配置或者预配置信道忙闲程度的门限2(即上述实施例中的第二忙闲程度阈值),若信道忙闲程度小于或等于门限2,UE按照第一调整策略调整每一个信道接入优先等级所对应的竞争窗口或者调整第一SL传输的CAPC所对应的竞争窗口。
若信道忙闲程度位于门限1和门限2之间,UE按照第三调整策略调整每一个信道接入优先等级所对应的竞争窗口或者调整第一SL传输的CAPC所对应的竞争窗口。
在一种实例中,门限1和门限2可以是一个值,即只需要配置或预配置一个门限值。
在一实施例中,当第二SL传输的HARQ反馈信息为NACK信息,或者SL传输类型(cast type)为使能反馈的第一组播类型的情况下,上述实施例中采用当前忙闲程度定义的竞争窗口调整策略同样适用于以下场景,即上一实施例中的“第二SL传输为使能反馈的第一组播类型”可以替换为下述的场景:
场景1:第二SL传输为未使能反馈的HARQ反馈信息或者SL传输类型(cast type)。例如,可以为广播,去使能(disable)反馈的单播,组播等。
场景2:第一SL传输为未使能反馈的HARQ反馈信息或者SL传输类型(cast type)。例如,可以为广播,去使能(disable)反馈的单播,组播等。
场景3:第一SL传输为使能反馈的第一组播类型。
场景4:第二SL传输为使能反馈的SL传输类型(cast type),但是UE未获取第二SL传输的反馈结果,即第二SL传输的反馈结果不可用。
场景5:UE未获取第二SL传输的反馈结果,且第一SL传输不包括重传,或者第一SL传输是在第二SL传输的参考时长之后的一个时间窗(time window,Tw)内进行的传输。
在一实施例中,图5是本申请实施例提供的一种信道接入装置的结构框图。本实施例应用于第一通信节点。如图5所示,本实施例包括:获取模块510、确定模块520和调整模块530。
获取模块510,配置为获取第一边链路SL传输所对应的第二SL传输的反 馈信息和SL传输类型,其中,第二SL传输为在第一SL传输之前采用第一信道接入类型获取的信道占用时间内进行的传输。
确定模块520,配置为根据反馈信息和SL传输类型确定第一SL传输的竞争窗口调整策略。
调整模块530,配置为按照竞争窗口调整策略调整第一SL传输所对应的竞争窗口,以使第一通信节点按照竞争窗口进行信道接入。
在一实施例中,第二SL传输为在第一SL传输之前采用第一信道接入类型获取的信道占用时间内进行的传输,包括下述之一:第二SL传输为获取的信道占用时间内进行的最近一次传输;第二SL传输为获取的信道占用时间内进行的首次传输;第二SL传输为获取的信道占用时间内进行的多次传输。
在一实施例中,竞争窗口调整策略包括下述之一:第一调整策略;第二调整策略;第三调整策略;其中,第一调整策略用于将竞争窗口的窗口长度值调整为允许的最小值或为允许的下一个更小窗口长度值;第二调整策略用于将竞争窗口的窗口长度值调整为下一个允许的更大窗口长度值;第三调整策略用于使竞争窗口的窗口长度值保持不变。
在一实施例中,确定模块520,包括:
第一确定单元,配置为根据第二SL传输在SL传输类型下的反馈信息确定第二SL传输的反馈成功率;第二确定单元,配置为根据反馈成功率和预设反馈成功率阈值确定第一SL传输的竞争窗口调整策略。
在一实施例中,第一确定单元,包括:
第一确定子单元,配置为确定第二SL传输为单播传输类型,并确定反馈信息为ACK信息的第二SL传输的数量;第二确定子单元,配置为根据反馈信息为ACK信息的第二SL传输的数量确定第二SL传输的反馈成功率。
在一实施例中,每个第二SL传输包括至少一个数据块,每个数据块对应一个反馈信息,且SL传输类型为单播传输,第一确定单元,包括:
第三确定子单元,配置为确定第二SL传输在单播传输下反馈信息为ACK信息的数据块数量;第四确定子单元,配置为根据ACK信息的数据块数量确定第二SL传输的反馈成功率。
在一实施例中,第二确定单元,配置为下述之一:
第二SL传输的反馈成功率达到预设反馈成功率阈值,按照第一调整策略调整每个信道接入优先级等级所对应的竞争窗口;第二SL传输的反馈成功率达到预设反馈成功率阈值,按照第一调整策略调整第一SL传输所对应信道接入优先 级等级对应的竞争窗口;第二SL传输的反馈成功率未达到预设反馈成功率阈值,按照第二调整策略调整每个信道接入优先级等级所对应的竞争窗口;第二SL传输的反馈成功率未达到预设反馈成功率阈值,按照第二调整策略调整第一SL传输所对应信道接入优先级等级对应的竞争窗口。
在一实施例中,第一确定单元,包括:
第五确定子单元,配置为第二SL传输为反馈信息为非确认NACK信息的第一组播类型,确定组播传输下反馈信息的数量,或者,确定是否检测到组播传输下的反馈信息;第六确定子单元,配置为根据反馈信息的数量或是否检测到反馈信息确定第二SL传输的反馈成功率。
在一实施例中,第二确定单元,配置为下述之一:
第二SL传输的反馈成功率达到预设反馈成功率阈值,按照第一调整策略调整每个信道接入优先级等级所对应的竞争窗口,或者按照第一调整策略调整第一SL传输所对应信道接入优先级等级对应的竞争窗口;第二SL传输的反馈成功率未达到预设反馈成功率阈值,按照第二调整策略调整每个信道接入优先级等级所对应的竞争窗口,或者按照第二调整策略调整第一SL传输所对应信道接入优先级等级对应的竞争窗口。
在一实施例中,第二确定单元,配置为下述之一:
第二SL传输的反馈成功率达到预设反馈成功率阈值时,按照第三调整策略调整每个信道接入优先级等级所对应的竞争窗口,或者按照第三调整策略调整第一SL传输所对应信道接入优先级等级对应的竞争窗口;第二SL传输的反馈成功率未达到预设反馈成功率阈值,按照第二调整策略调整每个信道接入优先级等级所对应的竞争窗口,或者按照第二调整策略调整第一SL传输所对应信道接入优先级等级对应的竞争窗口。
在一实施例中,第二确定单元,配置为下述之一:
第二SL传输的反馈成功率达到预设反馈成功率阈值时,按照第一调整策略调整每个信道接入优先级等级所对应的竞争窗口,或者按照第一调整策略调整第一SL传输所对应信道接入优先级等级对应的竞争窗口;第二SL传输的反馈成功率未达到预设反馈成功率阈值,按照第三调整策略调整每个信道接入优先级等级所对应的竞争窗口,或者按照第三调整策略调整第一SL传输所对应信道接入优先级等级对应的竞争窗口。
在一实施例中,第二SL传输采用反馈信息为ACK信息或NACK信息的第二组播类型;确定模块520,配置为下述之一:
第一通信节点至少接收到ACK信息,按照第一调整策略调整每个信道接入 优先级等级所对应的竞争窗口,或者按照第一调整策略调整第一SL传输所对应信道接入优先级等级对应的竞争窗口;第一通信节点未接收到ACK信息,按照第二调整策略调整每个信道接入优先级等级所对应的竞争窗口,或者按照第二调整策略调整第一SL传输所对应信道接入优先级等级对应的竞争窗口。
在一实施例中,第二SL传输采用第二组播类型;其中,第二组播类型为采用同一个资源反馈ACK信息或NACK信息
确定模块520,配置为下述之一:
第一通信节点仅接收到ACK消息,按照第一调整策略调整每个信道接入优先级等级所对应的竞争窗口,或者按照第一调整策略调整第一SL传输所对应信道接入优先级等级对应的竞争窗口;第一通信节点接收到ACK信息和NACK信息,按照第三调整策略调整每个信道接入优先级等级所对应的竞争窗口,或者按照第三调整策略调整第一SL传输所对应信道接入优先级等级对应的竞争窗口;第一通信节点未接收到ACK信息,按照第二调整策略调整每个信道接入优先级等级所对应的竞争窗口,或者按照第二调整策略调整第一SL传输所对应信道接入优先级等级对应的竞争窗口。
在一实施例中,第二SL传输采用第二组播类型;其中,第二组播类型为采用同一个资源反馈ACK信息或NACK信息。
确定模块520,配置为下述之一:
第一通信节点仅接收到ACK信息,按照第一调整策略调整每个信道接入优先级等级所对应的竞争窗口,或者按照第一调整策略调整第一SL传输所对应信道接入优先级等级对应的竞争窗口;第一通信节点仅接收到NACK信息,同时接收到ACK信息和NACK信息,或者,未接收到反馈消息,按照第二调整策略调整每个信道接入优先级等级所对应的竞争窗口,或者按照第二调整策略调整第一SL传输所对应信道接入优先级等级对应的竞争窗口。
在一实施例中,第二SL传输采用第三组播类型;其中,第三组播类型的第二通信节点采用对应的资源反馈ACK信息或NACK信息
确定模块520,包括:
第三确定单元,配置为确定第二SL传输在组播传输下反馈信息为ACK信息的数量、ACK信息的比例、ACK信息所对应第二通信节点的数量或ACK信息所对应第二通信节点的比例;第四确定单元,配置为根据ACK信息的数量、ACK信息的比例、ACK信息所对应第二通信节点的数量或ACK信息所对应第二通信节点的比例确定第一SL传输的竞争窗口调整策略。
在一实施例中,根据ACK信息或ACK信息所对应第二通信节点的数量确 定第一SL传输的竞争窗口调整策略,包括下述之一:
ACK信息或ACK信息所对应第二通信节点的数量大于或等于第一门限值,按照第一调整策略调整每个信道接入优先级等级所对应的竞争窗口,或者按照第一调整策略调整第一SL传输所对应信道接入优先级等级对应的竞争窗口;ACK信息或ACK信息所对应第二通信节点的数量小于第二门限值,按照第二调整策略调整每个信道接入优先级等级所对应的竞争窗口,或者按照第一调整策略调整第二SL传输所对应信道接入优先级等级对应的竞争窗口;其中,第一门限值大于或等于第二门限值。
在一实施例中,根据ACK信息或ACK信息所对应第二通信节点的比例确定第一SL传输的竞争窗口调整策略,包括下述之一:
ACK信息或ACK信息所对应第二通信节点的比例大于或等于第三门限值,按照第一调整策略调整每个信道接入优先级等级所对应的竞争窗口,或者按照第一调整策略调整第一SL传输所对应信道接入优先级等级对应的竞争窗口;ACK信息或ACK信息所对应第二通信节点的比例小于第四门限值,按照第二调整策略调整每个信道接入优先级等级所对应的竞争窗口,或者按照第二调整策略调整第一SL传输所对应信道接入优先级等级对应的竞争窗口;其中,第三门限值大于或等于第四门限值。
在一实施例中,反馈信息和SL传输类型满足预设反馈条件;确定模块520,配置为:按照第三调整策略调整每个信道接入优先级等级所对应的竞争窗口,或者按照第三调整策略调整第一SL传输所对应信道接入优先级等级对应的竞争窗口。
在一实施例中,反馈信息和SL传输类型满足预设反馈条件;确定模块520,包括:
第五确定单元,配置为确定第一通信节点所在信道的当前忙闲程度;第六确定单元,配置为根据当前忙闲程度确定第一SL传输的竞争窗口调整策略。
在一实施例中,第六确定单元,包括:
第七确定子单元,配置为根据当前忙闲程度和第一SL传输所对应的信道接入优先级等级确定第一SL传输对应的竞争窗口目标长度;调整子单元,配置为按照竞争窗口目标长度调整第一SL传输对应的竞争窗口。
在一实施例中,第六确定单元,配置为:
当前忙闲程度大于或等于第一忙闲程度阈值,按照第二调整策略调整每个信道接入优先级等级所对应的竞争窗口,或者按照第二调整策略调整第一SL传输所对应信道接入优先级等级对应的竞争窗口;当前忙闲程度小于第二忙闲程 度阈值,按照第一调整策略调整每个信道接入优先级等级所对应的竞争窗口,或者按照第一调整策略调整第一SL传输所对应信道接入优先级等级对应的竞争窗口;当前忙闲程度大于第二忙闲程度阈值且小于第一忙闲程度阈值,按照第三调整策略调整每个信道接入优先级等级所对应的竞争窗口,或者按照第三调整策略调整第一SL传输所对应信道接入优先级等级对应的竞争窗口;其中,第一忙闲程度阈值大于或等于第二忙闲程度阈值。
在一实施例中,预设反馈条件包括下述之一:
第二SL传输为未使能反馈的反馈信息;第一SL传输为未使能反馈的反馈信息;第一SL传输为使能反馈的反馈信息和SL传输类型,且SL传输类型为单播传输,以及第二通信节点采用同一个资源传输反馈信息;第二SL传输为使能反馈的SL传输类型,且第一通信节点未获取到反馈消息;第一通信节点未获取到第二SL传输的反馈消息,且第一SL传输未包括重传;第一通信节点未获取到第二SL传输的反馈消息,且第一SL传输为在第二SL传输所对应探测时长之后的一个时间窗进行的传输。
本实施例提供的信道接入装置设置为实现图3所示实施例的应用于第一通信节点的信道接入方法,本实施例提供的信道接入装置实现原理和技术效果类似,此处不再赘述。
在一实施例中,图6是本申请实施例提供的另一种信道接入装置的结构框图。本实施例应用于第二通信节点。如图6所示,本实施例包括:发送器610。
发送器610,配置为向第一通信节点发送第一SL传输所对应的第二SL传输的反馈信息和SL传输类型,以使第一通信节点根据反馈信息和SL传输类型确定第一SL传输的竞争窗口调整策略,以及按照竞争窗口调整策略调整第一SL传输所对应的竞争窗口,以使第一通信节点按照竞争窗口进行信道接入;其中,第二SL传输为在第一SL传输之前采用第一信道接入类型获取的信道占用时间内进行的传输。
本实施例提供的信道接入装置设置为实现图4所示实施例的应用于第二通信节点的信道接入方法,本实施例提供的信道接入装置实现原理和技术效果类似,此处不再赘述。
在一实施例中,图7是本申请实施例提供的一种信道接入设备的结构示意图。如图7所示,本申请提供的设备,包括:处理器710、存储器720和通信模块730。该设备中处理器710的数量可以是一个或者多个,图7中以一个处理器 710为例。该设备中存储器720的数量可以是一个或者多个,图7中以一个存储器720为例。该设备的处理器710、存储器720和通信模块730可以通过总线或者其他方式连接,图7中以通过总线连接为例。在该实施例中,该设备为可以为终端侧(比如,用户设备)。
存储器720作为一种计算机可读存储介质,可设置为存储软件程序、计算机可执行程序以及模块,如本申请任意实施例的设备对应的程序指令/模块(例如,信道接入装置中的获取模块510、确定模块520和调整模块530)。存储器720可包括存储程序区和存储数据区,其中,存储程序区可存储操作系统、至少一个功能所需的应用程序;存储数据区可存储根据设备的使用所创建的数据等。此外,存储器720可以包括高速随机存取存储器,还可以包括非易失性存储器,例如至少一个磁盘存储器件、闪存器件、或其他非易失性固态存储器件。在一些实例中,存储器720可包括相对于处理器710远程设置的存储器,这些远程存储器可以通过网络连接至设备。上述网络的实例包括但不限于互联网、企业内部网、局域网、移动通信网及其组合。
通信模块730,配置为用于与其它同步节点进行通信交互。
在信道接入设备为第一通信节点的情况下,上述提供的设备可设置为执行上述任意实施例提供的应用于第一通信节点的信道接入方法,具备相应的功能和效果。
在信道接入设备为第二通信节点的情况下,上述提供的设备可设置为执行上述任意实施例提供的应用于第二通信节点的信道接入方法,具备相应的功能和效果。
本申请实施例还提供一种包含计算机可执行指令的存储介质,计算机可执行指令在由计算机处理器执行时用于执行一种应用于第一通信节点的信道接入方法,该方法包括:获取第一边链路SL传输所对应的第二SL传输的反馈信息和SL传输类型,其中,第二SL传输为在第一SL传输之前采用第一信道接入类型获取的信道占用时间内进行的传输;根据反馈信息和SL传输类型确定第一SL传输的竞争窗口调整策略;按照竞争窗口调整策略调整第一SL传输所对应的竞争窗口,以使第一通信节点按照竞争窗口进行信道接入。
本申请实施例还提供一种包含计算机可执行指令的存储介质,计算机可执行指令在由计算机处理器执行时用于执行一种应用于第二通信节点的信道接入方法,该方法包括:向第一通信节点发送第一SL传输所对应的第二SL传输的反馈信息和SL传输类型,以使第一通信节点根据反馈信息和SL传输类型确定第一SL传输的竞争窗口调整策略,以及按照竞争窗口调整策略调整第一SL传输所对应的竞争窗口,以使第一通信节点按照竞争窗口进行信道接入;其中, 第二SL传输为在第一SL传输之前采用第一信道接入类型获取的信道占用时间内进行的传输。
本领域内的技术人员应明白,术语用户设备涵盖任何适合类型的无线用户设备,例如移动电话、便携数据处理装置、便携网络浏览器或车载移动台。
一般来说,本申请的多种实施例可以在硬件或专用电路、软件、逻辑或其任何组合中实现。例如,一些方面可以被实现在硬件中,而其它方面可以被实现在可以被控制器、微处理器或其它计算装置执行的固件或软件中,尽管本申请不限于此。
本申请的实施例可以通过移动装置的数据处理器执行计算机程序指令来实现,例如在处理器实体中,或者通过硬件,或者通过软件和硬件的组合。计算机程序指令可以是汇编指令、指令集架构(Instruction Set Architecture,ISA)指令、机器指令、机器相关指令、微代码、固件指令、状态设置数据、或者以一种或多种编程语言的任意组合编写的源代码或目标代码。
本申请附图中的任何逻辑流程的框图可以表示程序步骤,或者可以表示相互连接的逻辑电路、模块和功能,或者可以表示程序步骤与逻辑电路、模块和功能的组合。计算机程序可以存储在存储器上。存储器可以具有任何适合于本地技术环境的类型并且可以使用任何适合的数据存储技术实现,例如但不限于只读存储器(Read-Only Memory,ROM)、随机访问存储器(Random Access Memory,RAM)、光存储器装置和系统(数码多功能光碟(Digital Video Disc,DVD)或光盘(Compact Disk,CD))等。计算机可读介质可以包括非瞬时性存储介质。数据处理器可以是任何适合于本地技术环境的类型,例如但不限于通用计算机、专用计算机、微处理器、数字信号处理器(Digital Signal Processing,DSP)、专用集成电路(Application Specific Integrated Circuit,ASIC)、可编程逻辑器件(Field-Programmable Gate Array,FPGA)以及基于多核处理器架构的处理器。
Claims (25)
- 一种信道接入方法,应用于第一通信节点,包括:获取第一边链路SL传输所对应的第二SL传输的反馈信息和SL传输类型,其中,所述第二SL传输为在所述第一SL传输之前采用第一信道接入类型获取的信道占用时间内进行的传输;根据所述反馈信息和所述SL传输类型确定所述第一SL传输的竞争窗口调整策略;按照所述竞争窗口调整策略调整所述第一SL传输所对应的竞争窗口,以使所述第一通信节点按照所述竞争窗口进行信道接入。
- 根据权利要求1所述的方法,其中,所述第二SL传输为在所述第一SL传输之前采用第一信道接入类型获取的信道占用时间内进行的传输,包括下述之一:所述第二SL传输为获取的信道占用时间内进行的最近一次传输;所述第二SL传输为获取的信道占用时间内进行的首次传输;所述第二SL传输为获取的信道占用时间内进行的多次传输。
- 根据权利要求1所述的方法,其中,所述竞争窗口调整策略包括下述之一:第一调整策略;第二调整策略;第三调整策略;其中,所述第一调整策略用于将竞争窗口的窗口长度值调整为允许的最小值或为允许的下一个更小窗口长度值;所述第二调整策略用于将竞争窗口的窗口长度值调整为下一个允许的更大窗口长度值;所述第三调整策略用于使竞争窗口的窗口长度值保持不变。
- 根据权利要求1所述的方法,其中,所述根据所述反馈信息和所述SL传输类型确定所述第一SL传输的竞争窗口调整策略,包括:根据所述第二SL传输在所述SL传输类型下的反馈信息确定所述第二SL传输的反馈成功率;根据所述反馈成功率和预设反馈成功率阈值确定所述第一SL传输的竞争窗口调整策略。
- 根据权利要求4所述的方法,其中,所述根据所述第二SL传输在所述SL传输类型下的反馈信息确定所述第二SL传输的反馈成功率,包括:确定所述第二SL传输为单播传输类型,并确定反馈信息为确认ACK信息的第二SL传输的数量;根据所述反馈信息为ACK信息的第二SL传输的数量确定所述第二SL传输的反馈成功率。
- 根据权利要求4所述的方法,其中,每个第二SL传输包括至少一个数据 块,每个数据块对应一个反馈信息,且所述SL传输类型为单播传输,所述根据所述第二SL传输在所述SL传输类型下的反馈信息确定所述第二SL传输的反馈成功率,包括:确定所述第二SL传输在单播传输下反馈信息为ACK信息的数据块数量;根据所述ACK信息的数据块数量确定所述第二SL传输的反馈成功率。
- 根据权利要求5或6所述的方法,其中,所述根据所述反馈成功率和预设反馈成功率阈值确定所述第一SL传输的竞争窗口调整策略,包括下述之一:所述第二SL传输的反馈成功率达到预设反馈成功率阈值,按照第一调整策略调整每个信道接入优先级等级所对应的竞争窗口;所述第二SL传输的反馈成功率达到预设反馈成功率阈值,按照第一调整策略调整所述第一SL传输所对应信道接入优先级等级对应的竞争窗口;所述第二SL传输的反馈成功率未达到预设反馈成功率阈值,按照第二调整策略调整每个信道接入优先级等级所对应的竞争窗口;所述第二SL传输的反馈成功率未达到预设反馈成功率阈值,按照第二调整策略调整所述第一SL传输所对应信道接入优先级等级对应的竞争窗口。
- 根据权利要求4所述的方法,其中,所述根据所述第二SL传输在所述SL传输类型下的反馈信息确定所述第二SL传输的反馈成功率,包括:所述第二SL传输为反馈信息为非确认NACK信息的第一组播类型,确定组播传输下反馈信息的数量,或者,确定是否检测到组播传输下的反馈信息;根据所述反馈信息的数量或是否检测到反馈信息确定所述第二SL传输的反馈成功率。
- 根据权利要求8所述的方法,其中,所述根据所述反馈成功率和预设反馈成功率阈值确定所述第一SL传输的竞争窗口调整策略,包括下述之一:所述第二SL传输的反馈成功率达到预设反馈成功率阈值,按照第一调整策略调整每个信道接入优先级等级所对应的竞争窗口,或者按照第一调整策略调整所述第一SL传输所对应信道接入优先级等级对应的竞争窗口;所述第二SL传输的反馈成功率未达到预设反馈成功率阈值,按照第二调整策略调整每个信道接入优先级等级所对应的竞争窗口,或者按照第二调整策略调整所述第一SL传输所对应信道接入优先级等级对应的竞争窗口。
- 根据权利要求8所述的方法,其中,所述根据所述反馈成功率和预设反馈成功率阈值确定所述第一SL传输的竞争窗口调整策略,包括下述之一:所述第二SL传输的反馈成功率达到预设反馈成功率阈值,按照第三调整策略调整每个信道接入优先级等级所对应的竞争窗口,或者按照第三调整策略调整所述第一SL传输所对应信道接入优先级等级对应的竞争窗口;所述第二SL传输的反馈成功率未达到预设反馈成功率阈值,按照第二调整策略调整每个信道接入优先级等级所对应的竞争窗口,或者按照第二调整策略调整所述第一SL传输所对应信道接入优先级等级对应的竞争窗口。
- 根据权利要求8所述的方法,其中,所述根据所述反馈成功率和预设反馈成功率阈值确定所述第一SL传输的竞争窗口调整策略,包括下述之一:所述第二SL传输的反馈成功率达到预设反馈成功率阈值,按照第一调整策略调整每个信道接入优先级等级所对应的竞争窗口,或者按照第一调整策略调整所述第一SL传输所对应信道接入优先级等级对应的竞争窗口;所述第二SL传输的反馈成功率未达到预设反馈成功率阈值,按照第三调整策略调整每个信道接入优先级等级所对应的竞争窗口,或者按照第三调整策略调整所述第一SL传输所对应信道接入优先级等级对应的竞争窗口。
- 根据权利要求1所述的方法,其中,所述第二SL传输采用反馈信息为ACK信息或NACK信息的第二组播类型;所述根据所述反馈信息和所述SL传输类型确定所述第一SL传输的竞争窗口调整策略,包括下述之一:所述第一通信节点至少接收到ACK信息,按照第一调整策略调整每个信道接入优先级等级所对应的竞争窗口,或者按照第一调整策略调整所述第一SL传输所对应信道接入优先级等级对应的竞争窗口;所述第一通信节点未接收到ACK信息,按照第二调整策略调整每个信道接入优先级等级所对应的竞争窗口,或者按照第二调整策略调整所述第一SL传输所对应信道接入优先级等级对应的竞争窗口。
- 根据权利要求1所述的方法,其中,所述第二SL传输采用第二组播类型;其中,所述第二组播类型为采用同一个资源反馈ACK信息或NACK信息;所述根据所述反馈信息和所述SL传输类型确定所述第一SL传输的竞争窗口调整策略,包括下述之一:所述第一通信节点仅接收到ACK消息,按照第一调整策略调整每个信道接入优先级等级所对应的竞争窗口,或者按照第一调整策略调整所述第一SL传输所对应信道接入优先级等级对应的竞争窗口;所述第一通信节点接收到ACK信息和NACK信息,按照第三调整策略调整每个信道接入优先级等级所对应的竞争窗口,或者按照第三调整策略调整所 述第一SL传输所对应信道接入优先级等级对应的竞争窗口;所述第一通信节点未接收到ACK信息,按照第二调整策略调整每个信道接入优先级等级所对应的竞争窗口,或者按照第二调整策略调整所述第一SL传输所对应信道接入优先级等级对应的竞争窗口。
- 根据权利要求1所述的方法,其中,所述第二SL传输采用第二组播类型;其中,所述第二组播类型为采用同一个资源反馈ACK信息或NACK信息;所述根据所述反馈信息和所述SL传输类型确定所述第一SL传输的竞争窗口调整策略,包括下述之一:所述第一通信节点仅接收到ACK信息,按照第一调整策略调整每个信道接入优先级等级所对应的竞争窗口,或者按照第一调整策略调整所述第一SL传输所对应信道接入优先级等级对应的竞争窗口;所述第一通信节点仅接收到NACK信息,同时接收到ACK信息和NACK信息,或者,未接收到反馈消息,按照第二调整策略调整每个信道接入优先级等级所对应的竞争窗口,或者按照第二调整策略调整所述第一SL传输所对应信道接入优先级等级对应的竞争窗口。
- 根据权利要求1所述的方法,其中,所述第二SL传输采用第三组播类型;其中,所述第三组播类型的第二通信节点采用对应的资源反馈ACK信息或NACK信息所述根据所述反馈信息和所述SL传输类型确定所述第一SL传输的竞争窗口调整策略,包括:确定所述第二SL传输在组播传输下反馈信息为ACK信息的数量、ACK信息的比例、ACK信息所对应第二通信节点的数量或ACK信息所对应第二通信节点的比例;根据所述ACK信息的数量、ACK信息的比例、ACK信息所对应第二通信节点的数量或ACK信息所对应第二通信节点的比例确定所述第一SL传输的竞争窗口调整策略。
- 根据权利要求15所述的方法,其中,所述根据所述ACK信息或所述ACK信息所对应第二通信节点的数量确定所述第一SL传输的竞争窗口调整策略,包括下述之一:所述ACK信息或所述ACK信息所对应第二通信节点的数量大于或等于第一门限值,按照第一调整策略调整每个信道接入优先级等级所对应的竞争窗口,或者按照第一调整策略调整所述第一SL传输所对应信道接入优先级等级对应的 竞争窗口;所述ACK信息或所述ACK信息所对应第二通信节点的数量小于第二门限值,按照第二调整策略调整每个信道接入优先级等级所对应的竞争窗口,或者按照第一调整策略调整所述第二SL传输所对应信道接入优先级等级对应的竞争窗口;其中,所述第一门限值大于或等于所述第二门限值。
- 根据权利要求15所述的方法,其中,所述根据所述ACK信息或所述ACK信息所对应第二通信节点的比例确定所述第一SL传输的竞争窗口调整策略,包括下述之一:所述ACK信息或所述ACK信息所对应第二通信节点的比例大于或等于第三门限值,按照第一调整策略调整每个信道接入优先级等级所对应的竞争窗口,或者按照第一调整策略调整所述第一SL传输所对应信道接入优先级等级对应的竞争窗口;所述ACK信息或所述ACK信息所对应第二通信节点的比例小于第四门限值,按照第二调整策略调整每个信道接入优先级等级所对应的竞争窗口,或者按照第二调整策略调整所述第一SL传输所对应信道接入优先级等级对应的竞争窗口;其中,所述第三门限值大于或等于所述第四门限值。
- 根据权利要求1所述的方法,其中,所述反馈信息和SL传输类型满足预设反馈条件;所述根据所述反馈信息和所述SL传输类型确定所述第一SL传输的竞争窗口调整策略,包括:按照第三调整策略调整每个信道接入优先级等级所对应的竞争窗口,或者按照第三调整策略调整所述第一SL传输所对应信道接入优先级等级对应的竞争窗口。
- 根据权利要求1所述的方法,其中,所述反馈信息和SL传输类型满足预设反馈条件;所述根据所述反馈信息和所述SL传输类型确定所述第一SL传输的竞争窗口调整策略,包括:确定所述第一通信节点所在信道的当前忙闲程度;根据所述当前忙闲程度确定所述第一SL传输的竞争窗口调整策略。
- 根据权利要求19所述的方法,其中,所述根据所述当前忙闲程度确定所述第一SL传输的竞争窗口调整策略,包括:根据所述当前忙闲程度和所述第一SL传输所对应的信道接入优先级等级确定所述第一SL传输对应的竞争窗口目标长度;按照所述竞争窗口目标长度调整所述第一SL传输对应的竞争窗口。
- 根据权利要求19所述的方法,其中,所述根据所述当前忙闲程度确定所述第一SL传输的竞争窗口调整策略,包括:所述当前忙闲程度大于或等于第一忙闲程度阈值,按照第二调整策略调整每个信道接入优先级等级所对应的竞争窗口,或者按照第二调整策略调整所述第一SL传输所对应信道接入优先级等级对应的竞争窗口;所述当前忙闲程度小于第二忙闲程度阈值,按照第一调整策略调整每个信道接入优先级等级所对应的竞争窗口,或者按照第一调整策略调整所述第一SL传输所对应信道接入优先级等级对应的竞争窗口;所述当前忙闲程度大于第二忙闲程度阈值且小于第一忙闲程度阈值,按照第三调整策略调整每个信道接入优先级等级所对应的竞争窗口,或者按照第三调整策略调整所述第一SL传输所对应信道接入优先级等级对应的竞争窗口;其中,所述第一忙闲程度阈值大于或等于所述第二忙闲程度阈值。
- 根据权利要求18-21任一所述的方法,其中,所述预设反馈条件包括下述之一:所述第二SL传输为未使能反馈的反馈信息;所述第一SL传输为未使能反馈的反馈信息;所述第一SL传输为使能反馈的反馈信息和SL传输类型,且所述SL传输类型为单播传输,以及第二通信节点采用同一个资源传输反馈信息;所述第二SL传输为使能反馈的SL传输类型,且所述第一通信节点未获取到反馈消息;所述第一通信节点未获取到所述第二SL传输的反馈消息,且所述第一SL传输未包括重传;所述第一通信节点未获取到所述第二SL传输的反馈消息,且所述第一SL传输为在所述第二SL传输所对应探测时长之后的一个时间窗进行的传输。
- 一种信道接入方法,应用于第二通信节点,包括:向第一通信节点发送第一边链路SL传输所对应的第二SL传输的反馈信息和SL传输类型,以使所述第一通信节点根据所述反馈信息和所述SL传输类型确定所述第一SL传输的竞争窗口调整策略,以及按照所述竞争窗口调整策略调 整所述第一SL传输所对应的竞争窗口,以使第一通信节点按照所述竞争窗口进行信道接入;其中,所述第二SL传输为在所述第一SL传输之前采用第一信道接入类型获取的信道占用时间内进行的传输。
- 一种信道接入设备,包括:通信模块,存储器,以及至少一个处理器;所述通信模块,配置为与其它通信节点进行通信交互;所述存储器,配置为存储至少一个程序;当所述至少一个程序被所述至少一个处理器执行,使得所述至少一个处理器实现如权利要求1-22或23中任一项所述的信道接入方法。
- 一种存储介质,所述存储介质存储有计算机程序,所述计算机程序被处理器执行时实现如权利要求1-22或23中任一项所述的信道接入方法。
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US20200100284A1 (en) * | 2018-09-24 | 2020-03-26 | Samsung Electronics Co., Ltd. | Method and apparatus for contention window size adaptation of nr unlicensed |
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