CN111585708A - Method for determining multicast feedback resources, receiving node and sending node - Google Patents

Method for determining multicast feedback resources, receiving node and sending node Download PDF

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Publication number
CN111585708A
CN111585708A CN201910118042.8A CN201910118042A CN111585708A CN 111585708 A CN111585708 A CN 111585708A CN 201910118042 A CN201910118042 A CN 201910118042A CN 111585708 A CN111585708 A CN 111585708A
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resource
multicast
receiving
feedback
node
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CN111585708B (en
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冯媛
赵丽
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Datang Gaohong Zhilian Technology Chongqing Co ltd
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Datang Gaohong Data Network Technology Co ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/1607—Details of the supervisory signal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
    • H04L5/0055—Physical resource allocation for ACK/NACK
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/06—Selective distribution of broadcast services, e.g. multimedia broadcast multicast service [MBMS]; Services to user groups; One-way selective calling services

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

Abstract

The invention provides a method for determining multicast feedback resources, a receiving node and a sending node, which comprises the following steps: receiving indication information sent by a sending node of multicast, wherein the indication information is used for indicating a first feedback resource of the multicast; determining a dedicated feedback resource of the receiving node according to the first feedback resource indicated by the indication information and the receiving group number of the receiving node; in the embodiment of the invention, the sending node indicates the first feedback resource of multicast, and the receiving node determines the special feedback resource of the receiving node according to the receiving group number of the receiving node and the first feedback resource indicated by the sending node and sends the feedback information on the corresponding special feedback resource.

Description

Method for determining multicast feedback resources, receiving node and sending node
Technical Field
The present invention relates to the field of communications technologies, and in particular, to a method for determining multicast feedback resources, a receiving node, and a sending node.
Background
The V2X (vehicle to outside information exchange) technology can sense the surrounding conditions of the vehicle in real time, share road information and perform early warning in time by means of wireless communication between the vehicle and the vehicle, the vehicle and the road testing infrastructure, and the vehicle and the passerby, and has become a research hotspot for solving the problem of road safety at present.
In the existing LTE (Long Term Evolution) V2X technology (Rel-14 LTE V2X technology), PC5 interface (also called direct link, described as sildelink in the protocol) broadcast communication for transmitting data between UE (User Equipment) and UE can already support transmission of basic traffic based on road security.
With the further development of the car networking technology, NR V2X now appears some new application scenarios compared to LTE V2X, such as: vehicle formation, advanced driving, sensor information sharing, and remote control. For lte eidelink broadcast communication, the receiving end is not required to perform retransmission feedback, but for unicast and multicast, in order to improve the utilization rate of resources, it is desirable to introduce a feedback mechanism to control the retransmission times of the transmitting end.
No feedback is introduced in R14V 2X, and feedback on the Uu interface is between the UE and its camped base station, which can be regarded as a unicast feedback. Therefore, in the prior art, a feedback process design for multicast is not provided.
Disclosure of Invention
Embodiments of the present invention provide a method for determining multicast feedback resources, a receiving node, and a sending node, so as to solve the problem in the prior art that a multicast feedback process is incomplete.
In order to solve the above problem, an embodiment of the present invention provides a method for determining multicast feedback resources, which is applied to a receiving node of a multicast, and includes:
receiving indication information sent by a sending node of multicast, wherein the indication information is used for indicating a first feedback resource of the multicast;
and determining the special feedback resource of the receiving node according to the first feedback resource indicated by the indication information and the receiving group number of the receiving node.
Wherein, the dedicated feedback resources of different receiving nodes in the same group are orthogonal resources.
Wherein the multicast first feedback resource is: time-frequency resources;
the dedicated feedback resources of the receiving node are: dedicated time-frequency codeword resources.
Wherein the method further comprises:
receiving a resource multiplexing coefficient configured by the sending node or the high layer, wherein the resource multiplexing coefficient is as follows: the maximum code division multiplexing node number of the first feedback resource;
if the resource multiplexing coefficient is greater than or equal to the total number of the effective receiving nodes in the group, determining that the allocation principle of the first feedback resource is as follows: allocating different codewords of the first feedback resource to different receiving nodes;
if the resource multiplexing coefficient is smaller than the total number of the effective receiving nodes in the group, determining that the allocation principle of the first feedback resource is as follows: and dividing the frequency domain of the first feedback resource according to the total number of the effective receiving nodes to obtain at least two sub-feedback resources, and allocating different code words of the sub-feedback resources to different receiving nodes.
Wherein the resource multiplexing coefficient configured by the higher layer includes:
the resource multiplexing coefficient configured in the multicast connection establishing process through the PC5 interface;
alternatively, the first and second electrodes may be,
and resource multiplexing coefficients configured through a Uu interface of the system.
Wherein, the determining the dedicated feedback resource of the receiving node according to the first feedback resource indicated by the indication information and the receiving group number of the receiving node includes;
and determining code word information and/or frequency domain information of the dedicated feedback resources of the receiving node according to the determined allocation principle of the first feedback resources and the receiving group number of the receiving node.
Wherein the method further comprises:
receiving a group establishing number distributed by a sending node for the receiving node;
alternatively, the first and second electrodes may be,
and receiving the group establishing number distributed by the network side equipment for the receiving node.
Wherein the method further comprises:
and determining the receiving group number of the receiving node in the group according to the group establishing group number of the receiving node, the group establishing group number of the effective receiving node in the group and the number of the effective receiving nodes in the group.
Wherein the size of the frequency domain resource of the dedicated feedback resource of the receiving node is a pre-configured fixed value.
The embodiment of the invention also provides a method for determining multicast feedback resources, which is applied to a multicast sending node and comprises the following steps:
determining a first feedback resource of multicast;
and sending indication information to a multicast receiving node, wherein the indication information is used for indicating the multicast first feedback resource.
Wherein the determining the first feedback resource of the multicast includes:
determining the size of feedback resources required by multicast according to the total number of effective receiving nodes in the group, the resource multiplexing coefficient and the size of the frequency domain resources of the special feedback resources of the pre-configured receiving nodes; wherein the resource multiplexing coefficient is: the maximum code division multiplexing node number of the first feedback resource;
and determining the first feedback resource of the multicast according to the size of the feedback resource required by the multicast.
Wherein, the determining the first feedback resource of the multicast according to the size of the feedback resource required by the multicast includes:
indicating the size of the feedback resource required by the multicast to network side equipment, and determining a first feedback resource distributed for the multicast by the network side equipment according to the size of the feedback resource required by the multicast;
alternatively, the first and second electrodes may be,
and according to the size of the feedback resource required by the multicast, autonomously determining the first feedback resource of the multicast.
Wherein the determining the first feedback resource of the multicast includes:
indicating the total number of the effective receiving nodes in the group to network side equipment;
and determining a first feedback resource allocated for multicast by the network side equipment according to the total number of the effective receiving nodes in the group, the resource multiplexing coefficient and the pre-configured frequency domain resource of the special feedback resource of the receiving nodes.
Wherein the size of the frequency domain resource of the dedicated feedback resource of the receiving node is a pre-configured fixed value.
Wherein the resource multiplexing coefficient is:
the resource multiplexing coefficient configured in the multicast connection establishing process through the PC5 interface;
alternatively, the first and second electrodes may be,
and resource multiplexing coefficients configured through a Uu interface of the system.
An embodiment of the present invention further provides a receiving node, including: a transceiver, a memory, a processor, and a program stored on the memory and executable on the processor, the transceiver to: receiving indication information sent by a sending node of multicast, wherein the indication information is used for indicating a first feedback resource of the multicast;
the processor is used for reading the program in the memory and executing the following processes: and determining the special feedback resource of the receiving node according to the first feedback resource indicated by the indication information and the receiving group number of the receiving node.
Wherein, the dedicated feedback resources of different receiving nodes in the same group are orthogonal resources.
Wherein the multicast first feedback resource is: time-frequency resources;
the dedicated feedback resources of the receiving node are: dedicated time-frequency codeword resources.
Wherein the transceiver is further configured to:
receiving a resource multiplexing coefficient configured by the sending node or the high layer, wherein the resource multiplexing coefficient is as follows: the maximum code division multiplexing node number of the first feedback resource;
the processor is further configured to:
if the resource multiplexing coefficient is greater than or equal to the total number of the effective receiving nodes in the group, determining that the allocation principle of the first feedback resource is as follows: allocating different codewords of the first feedback resource to different receiving nodes;
if the resource multiplexing coefficient is smaller than the total number of the effective receiving nodes in the group, determining that the allocation principle of the first feedback resource is as follows: and dividing the frequency domain of the first feedback resource according to the total number of the effective receiving nodes to obtain at least two sub-feedback resources, and allocating different code words of the sub-feedback resources to different receiving nodes.
Wherein the resource multiplexing coefficient configured by the higher layer includes:
the resource multiplexing coefficient configured in the multicast connection establishing process through the PC5 interface;
alternatively, the first and second electrodes may be,
and resource multiplexing coefficients configured through a Uu interface of the system.
Wherein the processor is further configured to:
and determining code word information and/or frequency domain information of the dedicated feedback resources of the receiving node according to the determined allocation principle of the first feedback resources and the receiving group number of the receiving node.
Wherein the transceiver is further configured to:
receiving a group establishing number distributed by a sending node for the receiving node;
alternatively, the first and second electrodes may be,
and receiving the group establishing number distributed by the network side equipment for the receiving node.
Wherein the processor is further configured to:
and determining the receiving group number of the receiving node in the group according to the group establishing group number of the receiving node, the group establishing group number of the effective receiving node in the group and the number of the effective receiving nodes in the group.
Wherein the size of the frequency domain resource of the dedicated feedback resource of the receiving node is a pre-configured fixed value.
The embodiment of the present invention further provides a device for determining multicast feedback resources, which is applied to a receiving node of a multicast, and includes:
the receiving module is used for receiving indication information sent by a multicast sending node, wherein the indication information is used for indicating a first feedback resource of multicast;
a first determining module, configured to determine, according to the first feedback resource indicated by the indication information and the receiving group number of the receiving node, a dedicated feedback resource of the receiving node.
An embodiment of the present invention further provides a sending node, including: a transceiver, a memory, a processor and a program stored on the memory and executable on the processor, the processor being configured to read the program in the memory and perform the following processes: determining a first feedback resource of multicast;
the transceiver is configured to send indication information to a receiving node of a multicast, where the indication information is used to indicate a first feedback resource of the multicast.
Wherein the processor is further configured to:
determining the size of feedback resources required by multicast according to the total number of effective receiving nodes in the group, the resource multiplexing coefficient and the size of the frequency domain resources of the special feedback resources of the pre-configured receiving nodes; wherein the resource multiplexing coefficient is: the maximum code division multiplexing node number of the first feedback resource;
and determining the first feedback resource of the multicast according to the size of the feedback resource required by the multicast.
Wherein the processor is further configured to:
indicating the size of the feedback resource required by the multicast to network side equipment, and determining a first feedback resource distributed for the multicast by the network side equipment according to the size of the feedback resource required by the multicast;
alternatively, the first and second electrodes may be,
and according to the size of the feedback resource required by the multicast, autonomously determining the first feedback resource of the multicast.
Wherein the transceiver is further configured to:
indicating the total number of the effective receiving nodes in the group to network side equipment;
the processor is further configured to:
and determining a first feedback resource allocated for multicast by the network side equipment according to the total number of the effective receiving nodes in the group, the resource multiplexing coefficient and the pre-configured frequency domain resource of the special feedback resource of the receiving nodes.
Wherein the size of the frequency domain resource of the dedicated feedback resource of the receiving node is a pre-configured fixed value.
Wherein the resource multiplexing coefficient is:
the resource multiplexing coefficient configured in the multicast connection establishing process through the PC5 interface;
alternatively, the first and second electrodes may be,
and resource multiplexing coefficients configured through a Uu interface of the system.
The embodiment of the present invention further provides a device for determining multicast feedback resources, which is applied to a multicast sending node, and includes:
the second determining module is used for determining the first feedback resource of the multicast;
and the sending module is used for sending indication information to the multicast receiving node, wherein the indication information is used for indicating the multicast first feedback resource.
An embodiment of the present invention further provides a computer-readable storage medium, where a computer program is stored on the computer-readable storage medium, and when the computer program is executed by a processor, the steps of the method for determining multicast feedback resources as described above are implemented.
The technical scheme of the invention at least has the following beneficial effects:
in the method for determining multicast feedback resources, the receiving node and the sending node of the embodiment of the invention, the sending node indicates the first feedback resource of multicast, and the receiving node determines the special feedback resource of the receiving node according to the receiving group number of the receiving node and the first feedback resource indicated by the sending node and sends the feedback information on the corresponding special feedback resource.
Drawings
Fig. 1 is a flowchart illustrating a step of a method for determining multicast feedback resources according to an embodiment of the present invention;
fig. 2 is a flowchart illustrating a second step of the method for determining multicast feedback resources according to the embodiment of the present invention;
fig. 3 is a schematic structural diagram of a receiving node and a transmitting node according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a device for determining multicast feedback resources according to an embodiment of the present invention;
fig. 5 is a second schematic structural diagram of the apparatus for determining multicast feedback resources according to the embodiment of the present invention.
Detailed Description
In order to make the technical problems, technical solutions and advantages of the present invention more apparent, the following detailed description is given with reference to the accompanying drawings and specific embodiments.
As shown in fig. 1, an embodiment of the present invention provides a method for determining multicast feedback resources, which is applied to a receiving node of a multicast, and includes:
and 11, receiving indication information sent by a multicast sending node, wherein the indication information is used for indicating a first feedback resource of multicast.
In this step, the sending node may carry the indication Information through SCI (Sidelink Control Information). And the receiving node decodes the SCI to acquire the indication information.
And step 12, determining the dedicated feedback resource of the receiving node according to the first feedback resource indicated by the indication information and the receiving group number of the receiving node.
Further, after determining the dedicated feedback resource of the receiving node, the receiving node sends the feedback information on the corresponding dedicated feedback resource according to a receiving condition of a PSSCH (physical downlink Shared Channel).
In the embodiment of the invention, the multicast feedback is feedback based on ACK (acknowledgement) or NACK (non-acknowledgement); i.e. the receiving node needs to send feedback information, whether it is positive feedback or negative feedback.
For multicast, the goal of ACK or NACK is to distinguish between ACK or NACK or DTX (discontinuous reception), i.e. to allocate dedicated feedback resources for each receiving node.
Optionally, in the foregoing embodiment of the present invention, the multicast first feedback resource is: time-frequency resources; the dedicated feedback resources of the receiving node are: dedicated time-frequency codeword resources.
Preferably, the size of the frequency domain resource of the dedicated feedback resource of the receiving node is a pre-configured fixed value. For example, the size of the frequency domain resource of the dedicated feedback resource is m physical resource blocks PRB. Such as m equals 2.
It should be noted that, the multicast establishment process may be regarded as multiple connections between each receiving node and the sending node, and the connections are established to form a group, where the group includes one sending node (also referred to as a cluster head or a group head) and at least two receiving nodes (also referred to as cluster members or group members). The first feedback resource indicated by the indication information may be regarded as a feedback resource allocated to a group, and each receiving node in the group may determine its own dedicated feedback resource from the feedback resources allocated to the group according to its own receiving group number.
For the feedback of each receiving node, only one feedback (ACK or NACK) is possible at a time, so the feedback of each receiving node can use the same time-frequency resource and distinguish ACK or NACK by different code words.
For different receiving nodes in a group, the dedicated feedback resources of the different receiving nodes in the same group are orthogonal resources; i.e. the dedicated feedback resources of any two receiving nodes within the group are different at least in the frequency domain or codeword.
As an alternative embodiment, the method further comprises:
receiving a resource multiplexing coefficient configured by the sending node or the high layer, wherein the resource multiplexing coefficient is as follows: the maximum code division multiplexing node number of the first feedback resource; the resource multiplexing coefficient may be pre-configured, may be interactive in the connection establishment process, or may be indicated by being displayed in the SCI by the sending node, which is not specifically limited herein.
If the resource multiplexing coefficient is greater than or equal to the total number of the effective receiving nodes in the group, determining that the allocation principle of the first feedback resource is as follows: allocating different codewords of the first feedback resource to different receiving nodes;
if the resource multiplexing coefficient is smaller than the total number of the effective receiving nodes in the group, determining that the allocation principle of the first feedback resource is as follows: and dividing the frequency domain of the first feedback resource according to the total number of the effective receiving nodes to obtain at least two sub-feedback resources, and allocating different code words of the sub-feedback resources to different receiving nodes.
Wherein the resource multiplexing coefficient configured by the higher layer includes:
the resource multiplexing coefficient configured in the multicast connection establishing process through the PC5 interface;
alternatively, the first and second electrodes may be,
and resource multiplexing coefficients configured through a Uu interface of the system.
Bearing the above example, in the above embodiment of the present invention, step 12 includes;
and determining code word information and/or frequency domain information of the dedicated feedback resources of the receiving node according to the determined allocation principle of the first feedback resources and the receiving group number of the receiving node.
In particular, the number of terminals that can be code-division multiplexed on each resource is limited.
If the resource multiplexing coefficient is larger than or equal to the total number of the effective receiving nodes in the group, different receiving nodes can carry out code division multiplexing on the first feedback resource; for example, 6 receiving nodes are supported on the first feedback resource, and the corresponding cyclic shift is: {0,6} {1,7} {2,8} {3,9} {4,10} {5,11 }; corresponding to receiving node 1, receiving node 2, receiving node 3, receiving node 4, receiving node 5 and receiving node 6, respectively. For the receiving node 1, the corresponding shift of ACK on the time-frequency resource (first feedback resource) is 0; for the receiving node 2, the corresponding shift of NACK on the time-frequency resource (first feedback resource) is 7.
If the number of the receiving nodes is large, that is, the resource multiplexing coefficient is smaller than the total number of the effective receiving nodes in the group, the frequency domain of the first feedback resource needs to be divided according to the total number of the effective receiving nodes to obtain at least two sub-feedback resources, and different receiving nodes perform code division multiplexing on the at least two sub-feedback resources.
For example, the maximum resource multiplexing coefficient is 6, the total number of effective receiving nodes is 12, and considering that different codewords are allocated for ACK/NACK, the first feedback resource needs to be divided into a first sub-feedback resource and a second sub-feedback resource (the division of the sub-feedback resource into frequency domains).
For example, the sending node indicates a first feedback resource, which is 1 TTI (transmission time interval) in the time domain; 10 PRBs (Physical resource blocks) in the frequency domain. The transmitting node indicates a resource multiplexing coefficient of 6 through the SCI.
If the receiving node knows that the total number of the effective receiving nodes is 5. Because the number of the effective receiving nodes is less than that of the code division multiplexing nodes, the receiving nodes can share the whole time-frequency domain resource, and the receiving nodes can be distinguished orthogonally enough through the code words. Further, the receiving node obtains specific codeword information according to its own receiving group number, for example, if its own receiving group number is 3, the codebook uses 3.
Similarly, if the total number of the effective receiving nodes is 10, since the number of the effective receiving nodes is greater than the number of the code division multiplexing nodes, it is considered that the first feedback resource needs frequency division; for example, consider 5 consecutive PRBs as a single frequency-domain resource. And then determines the specific time-frequency code resource according to the group number of the receiving node. For example, the receiving node has a receiving group number of 7; since 7 is greater than the number of code division multiplexing nodes 6, the receiving node uses the second frequency domain resource, and mode (7,6) ═ 1, so the dedicated feedback resource of the receiving node is: a first codeword resource on a second frequency domain resource.
In the above embodiment of the present invention, the large allocation principle of the first feedback resource is a principle of first allocating the code domain and then allocating the frequency domain, that is, first determining whether the code domain is sufficiently used, and if the code domain is sufficiently used, only allocating the code domain to the first feedback resource; and if the code domain is not enough to be used, firstly carrying out frequency domain division on the first feedback resource, and then carrying out code domain distribution on the divided sub time-frequency resources.
As an alternative embodiment, the method further comprises:
receiving a group establishing number distributed by a sending node for the receiving node;
alternatively, the first and second electrodes may be,
and receiving the group establishing number distributed by the network side equipment for the receiving node.
The group establishment group number is a number assigned to the sending node or the network side device for the receiving node during the multicast establishment process, and may also be referred to as an absolute number.
The process of the sending node for distributing the group to the receiving node and establishing the group number is as follows:
the multicast establishing process may be regarded as multiple connections between each receiving node and the sending node are established, and the sending node allocates a group establishment group number to the joining nodes in the connection establishing process. The sending node maintains some information for the entire group including the group size and information for each group member (group setup group number, capabilities, etc.).
When a node is added, in the connection establishment process, the sending node distributes a group establishment group number (also called as an intra-group ID) for the newly added node according to the maintained information, and different from the C-RNTI of the cellular network, the intra-group ID of the receiving node in the same group ensures the continuity as much as possible, namely the maximum intra-group ID number is consistent with the group size.
When the sending node allocates the ID in the group to the receiving node, the sending node may perform Sidelink RRC signaling. The RRC signaling is encrypted so that it is not known to third parties, protecting privacy.
The process of the network side equipment for allocating the group to the receiving node and establishing the group number is as follows:
the entire multicast group establishment process is network managed.
When a node needs to join a group, the network assigns it an initial intra-group ID during the grouping process. The allocation here may be a network NAS layer (non access stratum) allocation.
Two scenarios are generally included with respect to a group:
scene one: completely static groups, such as operating fleets. For scenario one, the group setup group number of the receiving node does not need to be changed, and once initially allocated, it will not be changed.
Scene two: semi-static groups, allowing joining groups as well as leaving groups. For the scene two, if a node is added, only the newly accessed node is allocated with the initial ID, and the IDs of other nodes are not influenced; when a node leaves, the ID of other nodes can be influenced; it is necessary to ensure that the ID of the receiving node is continuously up-to-date (optional) by means of higher layer information, such as a reconfiguration message.
For example, when a node leaves, the sending node determines the set of affected receiving nodes according to the maintained information; the affected respective receiving nodes are reassigned the intra-group ID and the intra-group ID can be updated through SL RRC signaling. The RRC signaling is encrypted so that it is not known to third parties, protecting privacy. When the sending node sends the 'update ID signaling', the sending node considers the update to be valid after receiving the L1/R2/R3 confirmation message of the opposite receiving node.
Further, in the above embodiment of the present invention, the method further includes:
and determining the receiving group number of the receiving node in the group according to the group establishment group number of the receiving node (the group establishment group number is the latest group establishment group number, such as the initially allocated group establishment group number or the updated group establishment group number), the group establishment group number of the effective receiving node in the group and the number of the effective receiving nodes in the group.
It should be noted that, the receiving group number is a number used by the receiving node to determine the dedicated feedback resource, and in order to reduce the waste of resources, in the embodiment of the present invention, the receiving group number is a relative number of the receiving node in one group, which may also be referred to as a number of the receiving node in one group relative to an active node.
If the current ID is 11 at the maximum, in practice there are 8 members in the group, i.e. 8 valid IDs. Say {2, 5, 10} node has left; {1, 3, 4, 6, 7, 8, 9, 11} is also within the group;
the sending node may employ the following indications: maximum group size (ID max) + group valid bitmap (bitmap) indication; wherein, bitmap: 10110111101; the receiving node receiving the indication can acquire the group establishment group number of the effective receiving nodes in the group and the number of the effective receiving nodes in the group, so that the receiving group number of the receiving node in the group can be confirmed.
For example, for cluster 1, node a is the cluster head (i.e., the sending node); after the node B joins, the cluster head or the higher layer assigns an intra-group ID to the node B in the connection establishment process of 6. Based on the current indication of the sending node, node B may consider its relative intra-group ID to be 4 because both ID2 and ID 5 have left the group.
Through the above process of determining the receiving group number of the receiving node, each receiving node in the group can know its relative receiving group number and the size of the valid receiving node in the group. And when the receiving node selects the own special feedback resource, the special time-frequency code resource is determined according to the actual size and the receiving group number.
It should be noted that, if the group establishment group number of the receiving node is only initially maintained and is not updated subsequently, a situation that the intra-group number is not continuous may occur, and if the receiving node does not know whether other receiving nodes in the group are valid, the receiving node may determine its dedicated feedback resource according to the initially maintained group establishment group number.
In summary, in the above embodiments of the present invention, the sending node indicates the first feedback resource for multicast, and the receiving node determines the dedicated feedback resource of the receiving node according to its own receiving group number and the first feedback resource indicated by the sending node, and sends the feedback information on the corresponding dedicated feedback resource.
As shown in fig. 2, an embodiment of the present invention further provides a method for determining multicast feedback resources, which is applied to a multicast sending node, and includes:
step 21, determining a first feedback resource of multicast;
and step 22, sending indication information to the multicast receiving node, wherein the indication information is used for indicating the multicast first feedback resource.
In this step, the sending node may carry the indication Information through SCI (Sidelink Control Information). And the receiving node decodes the SCI to acquire the indication information.
In the embodiment of the invention, the sending node determines the receiving node and determines the feedback information to the sending node by a sequence detection mode.
In the embodiment of the invention, the multicast feedback is feedback based on ACK (acknowledgement) or NACK (non-acknowledgement); i.e. the receiving node needs to send feedback information, whether it is positive feedback or negative feedback.
For multicast, the goal of ACK or NACK is to distinguish between ACK or NACK or DTX (discontinuous reception), i.e. to allocate dedicated feedback resources for each receiving node.
Optionally, in the foregoing embodiment of the present invention, the multicast first feedback resource is: and (4) time frequency resources.
The first feedback resource is determined as follows:
the first method is as follows: the sending node determines the size of the feedback resource required by multicast according to the total number of the effective receiving nodes in the group, the resource multiplexing coefficient and the pre-configured size of the frequency domain resource of the special feedback resource of the receiving node; wherein the resource multiplexing coefficient is: the maximum code division multiplexing node number of the first feedback resource;
and determining the first feedback resource of the multicast according to the size of the feedback resource required by the multicast.
It should be noted that, in this manner, the resource reuse factor is determined by the sending node, and the value of the resource reuse factor may be related to the congestion measurement result. The resource multiplexing coefficient may be preconfigured, or may be interactive in the connection establishment process, and is not specifically limited herein; the resource multiplexing coefficient may also be a fixed value. The size of the frequency domain resource of the dedicated feedback resource of the receiving node is a pre-configured fixed value, for example, m PRBs.
In this way, the determining the first feedback resource for multicast according to the size of the feedback resource required for multicast includes:
indicating the size of the feedback resource required by the multicast to network side equipment, and determining a first feedback resource distributed for the multicast by the network side equipment according to the size of the feedback resource required by the multicast; i.e. the mode in which the base station allocates resources;
or, according to the size of the feedback resource required by the multicast, autonomously determining the first feedback resource of the multicast; i.e. a mode in which the sending node autonomously selects resources.
Preferably, the resource multiplexing coefficient includes:
the resource multiplexing coefficient configured in the multicast connection establishing process through the PC5 interface; or the resource multiplexing coefficient configured through the Uu interface of the system.
The second method comprises the following steps: the number of effective receiving nodes in the group reported by the sending node is determined by the network side equipment. Namely, step 21 includes:
indicating the total number of the effective receiving nodes in the group to network side equipment;
and determining a first feedback resource allocated for multicast by the network side equipment according to the total number of the effective receiving nodes in the group, the resource multiplexing coefficient and the pre-configured frequency domain resource of the special feedback resource of the receiving nodes.
The system pre-configures the resource multiplexing coefficients or the base station to determine the resource multiplexing coefficients. The value of the resource multiplexing coefficient is determined by a base station according to two factors of the number of nodes reported and/or supported by DCC (data communication channel), and the resource allocation is dynamically indicated to the nodes; or a pre-configured mode is adopted, and a static pre-configured or semi-static mode is effective through RRC signaling.
The size of the frequency domain resource of the dedicated feedback resource of the receiving node is a pre-configured fixed value, for example, m PRBs.
For example, if the size of the frequency domain resource of the predetermined dedicated feedback resource is 2 PRBs, the resource multiplexing coefficient is 8, and the total number of effective receiving nodes in the group is 6, the frequency domain size of the first feedback resource is 2 PRBs; for another example, if the total number of the effective receiving nodes in the group is 10, the frequency domain size of the first feedback resource is 4 PRBs, etc., which are not enumerated here.
As an alternative embodiment, the sending node may obtain whether each receiving node performs feedback (DTX) and a specific feedback condition (ACK or NACK) through sequence detection on the determined feedback resources. Further, the sending node may use a differentiated retransmission manner, that is, may determine a retransmission resource according to the determined terminal, and use non-adaptive retransmission, such as adjusting MCS (Modulation and Coding Scheme, Modulation and Coding strategy), adjusting RV (Redundancy Version), and the like.
For the sending node, the sending node may determine whether there is a discontinuous reception DTX user according to the actual number of feedback nodes and the number of nodes that should be fed back. For example, the sequence detection of the sending node is a definite number, which is consistent with the actual number of users; for another example, the number of sequence detections is determined based on the largest ID in the group, which is greater than the actual number of users.
In summary, in the above embodiments of the present invention, the sending node indicates the first feedback resource for multicast, and the receiving node determines the dedicated feedback resource of the receiving node according to its own receiving group number and the first feedback resource indicated by the sending node, and sends the feedback information on the corresponding dedicated feedback resource.
As shown in fig. 3, an embodiment of the present invention further provides a receiving node, including: a transceiver 320, a memory 310, a processor 300, and a program stored on the memory 310 and executable on the processor 300, the transceiver 320 for: receiving indication information sent by a sending node of multicast, wherein the indication information is used for indicating a first feedback resource of the multicast;
the processor 300 is used for reading the program in the memory and executing the following processes: and determining the special feedback resource of the receiving node according to the first feedback resource indicated by the indication information and the receiving group number of the receiving node.
Optionally, in the foregoing embodiment of the present invention, dedicated feedback resources of different receiving nodes in the same group are orthogonal resources.
Optionally, in the foregoing embodiment of the present invention, the multicast first feedback resource is: time-frequency resources;
the dedicated feedback resources of the receiving node are: dedicated time-frequency codeword resources.
Optionally, in the foregoing embodiment of the present invention, the transceiver 320 is further configured to:
receiving a resource multiplexing coefficient configured by the sending node or the high layer, wherein the resource multiplexing coefficient is as follows: the maximum code division multiplexing node number of the first feedback resource;
the processor 300 is further configured to:
if the resource multiplexing coefficient is greater than or equal to the total number of the effective receiving nodes in the group, determining that the allocation principle of the first feedback resource is as follows: allocating different codewords of the first feedback resource to different receiving nodes;
if the resource multiplexing coefficient is smaller than the total number of the effective receiving nodes in the group, determining that the allocation principle of the first feedback resource is as follows: and dividing the frequency domain of the first feedback resource according to the total number of the effective receiving nodes to obtain at least two sub-feedback resources, and allocating different code words of the sub-feedback resources to different receiving nodes.
Optionally, in the foregoing embodiment of the present invention, the resource multiplexing coefficient configured by the higher layer includes:
the resource multiplexing coefficient configured in the multicast connection establishing process through the PC5 interface;
alternatively, the first and second electrodes may be,
and resource multiplexing coefficients configured through a Uu interface of the system.
Optionally, in the foregoing embodiment of the present invention, the processor 300 is further configured to:
and determining code word information and/or frequency domain information of the dedicated feedback resources of the receiving node according to the determined allocation principle of the first feedback resources and the receiving group number of the receiving node.
Optionally, in the foregoing embodiment of the present invention, the transceiver 320 is further configured to:
receiving a group establishing number distributed by a sending node for the receiving node;
alternatively, the first and second electrodes may be,
and receiving the group establishing number distributed by the network side equipment for the receiving node.
Optionally, in the foregoing embodiment of the present invention, the processor 300 is further configured to:
and determining the receiving group number of the receiving node in the group according to the group establishing group number of the receiving node, the group establishing group number of the effective receiving node in the group and the number of the effective receiving nodes in the group.
Optionally, in the foregoing embodiment of the present invention, the size of the frequency domain resource of the dedicated feedback resource of the receiving node is a pre-configured fixed value.
In summary, in the above embodiments of the present invention, the sending node indicates the first feedback resource for multicast, and the receiving node determines the dedicated feedback resource of the receiving node according to its own receiving group number and the first feedback resource indicated by the sending node, and sends the feedback information on the corresponding dedicated feedback resource.
It should be noted that, the receiving node provided in the embodiments of the present invention is a receiving node capable of executing the method for determining multicast feedback resources, and all embodiments of the method for determining multicast feedback resources are applicable to the receiving node, and can achieve the same or similar beneficial effects.
As shown in fig. 4, an apparatus for determining multicast feedback resources according to an embodiment of the present invention is applied to a receiving node of a multicast, and includes:
a receiving module 41, configured to receive indication information sent by a sending node of a multicast, where the indication information is used to indicate a first feedback resource of the multicast;
a first determining module 42, configured to determine, according to the first feedback resource indicated by the indication information and the receiving group number of the receiving node, a dedicated feedback resource of the receiving node.
Optionally, in the foregoing embodiment of the present invention, dedicated feedback resources of different receiving nodes in the same group are orthogonal resources.
Optionally, in the foregoing embodiment of the present invention, the multicast first feedback resource is: time-frequency resources;
the dedicated feedback resources of the receiving node are: dedicated time-frequency codeword resources.
Optionally, in the above embodiment of the present invention, the apparatus further includes:
a coefficient determining module, configured to receive a resource multiplexing coefficient configured by the sending node or a higher layer, where the resource multiplexing coefficient is: the maximum code division multiplexing node number of the first feedback resource;
a first allocation determining module, configured to determine, if the resource multiplexing coefficient is greater than or equal to the total number of effective receiving nodes in a group, that an allocation principle of the first feedback resource is: allocating different codewords of the first feedback resource to different receiving nodes;
a second allocation determining module, configured to determine, if the resource multiplexing coefficient is smaller than the total number of effective receiving nodes in the group, that an allocation principle of the first feedback resource is: and dividing the frequency domain of the first feedback resource according to the total number of the effective receiving nodes to obtain at least two sub-feedback resources, and allocating different code words of the sub-feedback resources to different receiving nodes.
Optionally, in the foregoing embodiment of the present invention, the resource multiplexing coefficient configured by the higher layer includes:
the resource multiplexing coefficient configured in the multicast connection establishing process through the PC5 interface;
alternatively, the first and second electrodes may be,
and resource multiplexing coefficients configured through a Uu interface of the system.
Optionally, in the foregoing embodiment of the present invention, the first determining module includes;
and the first determining submodule is used for determining code word information and/or frequency domain information of the dedicated feedback resources of the receiving node according to the determined allocation principle of the first feedback resources and the receiving group number of the receiving node.
Optionally, in the above embodiment of the present invention, the apparatus further includes:
a number receiving module, configured to receive a group setup group number allocated by a sending node for the receiving node; or, the group number is set up for the group allocated to the receiving node by the receiving network side device.
Optionally, in the above embodiment of the present invention, the apparatus further includes:
and the number determining module is used for determining the receiving group number of the receiving node in the group according to the group establishing group number of the receiving node, the group establishing group number of the effective receiving node in the group and the number of the effective receiving nodes in the group.
Optionally, in the foregoing embodiment of the present invention, the size of the frequency domain resource of the dedicated feedback resource of the receiving node is a pre-configured fixed value.
In summary, in the above embodiments of the present invention, the sending node indicates the first feedback resource for multicast, and the receiving node determines the dedicated feedback resource of the receiving node according to its own receiving group number and the first feedback resource indicated by the sending node, and sends the feedback information on the corresponding dedicated feedback resource.
It should be noted that the apparatus for determining multicast feedback resources provided in the embodiments of the present invention is an apparatus capable of executing the method for determining multicast feedback resources, and all embodiments of the method for determining multicast feedback resources are applicable to the apparatus and all can achieve the same or similar beneficial effects.
As shown in fig. 3, an embodiment of the present invention further provides a sending node, including: a transceiver 320, a memory 310, a processor 300 and a program stored on the memory 310 and executable on the processor 300, the processor 300 being configured to read the program in the memory and execute the following processes: determining a first feedback resource of multicast;
the transceiver 320 is configured to send indication information to a receiving node of the multicast, where the indication information is used to indicate a first feedback resource of the multicast.
Optionally, in the foregoing embodiment of the present invention, the processor 300 is further configured to:
determining the size of feedback resources required by multicast according to the total number of effective receiving nodes in the group, the resource multiplexing coefficient and the size of the frequency domain resources of the special feedback resources of the pre-configured receiving nodes; wherein the resource multiplexing coefficient is: the maximum code division multiplexing node number of the first feedback resource;
and determining the first feedback resource of the multicast according to the size of the feedback resource required by the multicast.
Optionally, in the foregoing embodiment of the present invention, the processor 300 is further configured to:
indicating the size of the feedback resource required by the multicast to network side equipment, and determining a first feedback resource distributed for the multicast by the network side equipment according to the size of the feedback resource required by the multicast;
alternatively, the first and second electrodes may be,
and according to the size of the feedback resource required by the multicast, autonomously determining the first feedback resource of the multicast.
Optionally, in the foregoing embodiment of the present invention, the transceiver 320 is further configured to:
indicating the total number of the effective receiving nodes in the group to network side equipment;
the processor 300 is further configured to:
and determining a first feedback resource allocated for multicast by the network side equipment according to the total number of the effective receiving nodes in the group, the resource multiplexing coefficient and the pre-configured frequency domain resource of the special feedback resource of the receiving nodes.
Optionally, in the foregoing embodiment of the present invention, the size of the frequency domain resource of the dedicated feedback resource of the receiving node is a pre-configured fixed value.
Optionally, in the foregoing embodiment of the present invention, the resource multiplexing coefficient includes:
the resource multiplexing coefficient configured in the multicast connection establishing process through the PC5 interface;
alternatively, the first and second electrodes may be,
and resource multiplexing coefficients configured through a Uu interface of the system.
In summary, in the above embodiments of the present invention, the sending node indicates the first feedback resource for multicast, and the receiving node determines the dedicated feedback resource of the receiving node according to its own receiving group number and the first feedback resource indicated by the sending node, and sends the feedback information on the corresponding dedicated feedback resource.
It should be noted that, the sending node provided in the embodiments of the present invention is a sending node capable of executing the method for determining multicast feedback resources, and all embodiments of the method for determining multicast feedback resources are applicable to the sending node, and can achieve the same or similar beneficial effects.
As shown in fig. 5, an embodiment of the present invention further provides a device for determining multicast feedback resources, which is applied to a multicast sending node, and includes:
a second determining module 51, configured to determine a first feedback resource for multicast;
a sending module 52, configured to send, to a receiving node of the multicast, indication information, where the indication information is used to indicate a first feedback resource of the multicast.
Optionally, in the above embodiment of the present invention, the second determining module includes:
the second determining submodule is used for determining the size of the feedback resource required by multicast according to the total number of the effective receiving nodes in the group, the resource multiplexing coefficient and the pre-configured size of the frequency domain resource of the special feedback resource of the receiving node; wherein the resource multiplexing coefficient is: the maximum code division multiplexing node number of the first feedback resource;
and the third determining submodule is used for determining the first feedback resource of the multicast according to the size of the feedback resource required by the multicast.
Optionally, in the above embodiment of the present invention, the third determining sub-module includes:
a determining unit, configured to indicate the size of the feedback resource required for multicast to a network side device, and determine a first feedback resource allocated to multicast by the network side device according to the size of the feedback resource required for multicast;
or, the method is used for autonomously determining the first feedback resource of the multicast according to the size of the feedback resource required by the multicast.
Optionally, in the above embodiment of the present invention, the second determining module includes:
a fourth determining submodule, configured to indicate the total number of valid receiving nodes in the group to the network side device;
and the fifth determining submodule is used for determining the first feedback resource allocated for multicast by the network side equipment according to the total number of the effective receiving nodes in the group, the resource multiplexing coefficient and the pre-configured frequency domain resource of the special feedback resource of the receiving node.
Optionally, in the foregoing embodiment of the present invention, the size of the frequency domain resource of the dedicated feedback resource of the receiving node is a pre-configured fixed value.
Optionally, in the foregoing embodiment of the present invention, the resource multiplexing coefficient includes:
the resource multiplexing coefficient configured in the multicast connection establishing process through the PC5 interface;
alternatively, the first and second electrodes may be,
and resource multiplexing coefficients configured through a Uu interface of the system.
In summary, in the above embodiments of the present invention, the sending node indicates the first feedback resource for multicast, and the receiving node determines the dedicated feedback resource of the receiving node according to its own receiving group number and the first feedback resource indicated by the sending node, and sends the feedback information on the corresponding dedicated feedback resource.
It should be noted that the apparatus for determining multicast feedback resources provided in the embodiments of the present invention is an apparatus capable of executing the method for determining multicast feedback resources, and all embodiments of the method for determining multicast feedback resources are applicable to the apparatus and all can achieve the same or similar beneficial effects.
An embodiment of the present invention further provides a computer-readable storage medium, where a computer program is stored on the computer-readable storage medium, and when executed by a processor, the computer program implements each process of the above-described method for determining a multicast feedback resource, and can achieve the same technical effect, and is not described herein again to avoid repetition. The computer-readable storage medium may be a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
Through the above description of the embodiments, those skilled in the art will clearly understand that the method of the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but in many cases, the former is a better implementation manner. Based on such understanding, the technical solutions of the present invention may be embodied in the form of a software product, which is stored in a storage medium (such as ROM/RAM, magnetic disk, optical disk) and includes instructions for enabling a terminal (such as a mobile phone, a computer, a server, an air conditioner, or a network device) to execute the method according to the embodiments of the present invention.
While the present invention has been described with reference to the embodiments shown in the drawings, the present invention is not limited to the embodiments, which are illustrative and not restrictive, and it will be apparent to those skilled in the art that various changes and modifications can be made therein without departing from the spirit and scope of the invention as defined in the appended claims.
While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined in the appended claims.

Claims (33)

1. A method for determining multicast feedback resources is applied to a receiving node of multicast, and is characterized by comprising the following steps:
receiving indication information sent by a sending node of multicast, wherein the indication information is used for indicating a first feedback resource of the multicast;
and determining the special feedback resource of the receiving node according to the first feedback resource indicated by the indication information and the receiving group number of the receiving node.
2. The method of claim 1, wherein dedicated feedback resources for different receiving nodes within the same group are orthogonal resources.
3. The method of claim 1, wherein the multicast first feedback resource is: time-frequency resources;
the dedicated feedback resources of the receiving node are: dedicated time-frequency codeword resources.
4. The method of claim 3, further comprising:
receiving a resource multiplexing coefficient configured by the sending node or the high layer, wherein the resource multiplexing coefficient is as follows: the maximum code division multiplexing node number of the first feedback resource;
if the resource multiplexing coefficient is greater than or equal to the total number of the effective receiving nodes in the group, determining that the allocation principle of the first feedback resource is as follows: allocating different codewords of the first feedback resource to different receiving nodes;
if the resource multiplexing coefficient is smaller than the total number of the effective receiving nodes in the group, determining that the allocation principle of the first feedback resource is as follows: and dividing the frequency domain of the first feedback resource according to the total number of the effective receiving nodes to obtain at least two sub-feedback resources, and allocating different code words of the sub-feedback resources to different receiving nodes.
5. The method of claim 4, wherein the higher layer configured resource multiplexing coefficients comprise:
the resource multiplexing coefficient configured in the multicast connection establishing process through the PC5 interface;
alternatively, the first and second electrodes may be,
and resource multiplexing coefficients configured through a Uu interface of the system.
6. The method according to claim 4, wherein the determining dedicated feedback resources of the receiving node according to the first feedback resources indicated by the indication information and the receiving group number of the receiving node comprises;
and determining code word information and/or frequency domain information of the dedicated feedback resources of the receiving node according to the determined allocation principle of the first feedback resources and the receiving group number of the receiving node.
7. The method of claim 1, further comprising:
receiving a group establishing number distributed by a sending node for the receiving node;
alternatively, the first and second electrodes may be,
and receiving the group establishing number distributed by the network side equipment for the receiving node.
8. The method of claim 7, further comprising:
and determining the receiving group number of the receiving node in the group according to the group establishing group number of the receiving node, the group establishing group number of the effective receiving node in the group and the number of the effective receiving nodes in the group.
9. The method according to claim 3, wherein the size of the frequency domain resource of the dedicated feedback resource of the receiving node is a pre-configured fixed value.
10. A method for determining multicast feedback resources is applied to a multicast sending node, and is characterized by comprising the following steps:
determining a first feedback resource of multicast;
and sending indication information to a multicast receiving node, wherein the indication information is used for indicating the multicast first feedback resource.
11. The method of claim 10, wherein determining the first feedback resource for the multicast comprises:
determining the size of feedback resources required by multicast according to the total number of effective receiving nodes in the group, the resource multiplexing coefficient and the size of the frequency domain resources of the special feedback resources of the pre-configured receiving nodes; wherein the resource multiplexing coefficient is: the maximum code division multiplexing node number of the first feedback resource;
and determining the first feedback resource of the multicast according to the size of the feedback resource required by the multicast.
12. The method of claim 11, wherein the determining the first feedback resource of the multicast according to the size of the feedback resource required by the multicast comprises:
indicating the size of the feedback resource required by the multicast to network side equipment, and determining a first feedback resource distributed for the multicast by the network side equipment according to the size of the feedback resource required by the multicast;
alternatively, the first and second electrodes may be,
and according to the size of the feedback resource required by the multicast, autonomously determining the first feedback resource of the multicast.
13. The method of claim 10, wherein determining the first feedback resource for the multicast comprises:
indicating the total number of the effective receiving nodes in the group to network side equipment;
and determining a first feedback resource allocated for multicast by the network side equipment according to the total number of the effective receiving nodes in the group, the resource multiplexing coefficient and the pre-configured frequency domain resource of the special feedback resource of the receiving nodes.
14. The method according to claim 11 or 13, wherein the size of the frequency domain resource of the dedicated feedback resource of the receiving node is a pre-configured fixed value.
15. The method of claim 11, wherein the resource multiplexing coefficient is:
the resource multiplexing coefficient configured in the multicast connection establishing process through the PC5 interface;
alternatively, the first and second electrodes may be,
and resource multiplexing coefficients configured through a Uu interface of the system.
16. A receiving node, comprising: a transceiver, a memory, a processor, and a program stored on the memory and executable on the processor; it is characterized in that the preparation method is characterized in that,
the transceiver is configured to: receiving indication information sent by a sending node of multicast, wherein the indication information is used for indicating a first feedback resource of the multicast;
the processor is used for reading the program in the memory and executing the following processes: and determining the special feedback resource of the receiving node according to the first feedback resource indicated by the indication information and the receiving group number of the receiving node.
17. The receiving node of claim 16, wherein the dedicated feedback resources of different receiving nodes within the same group are orthogonal resources.
18. The receiving node of claim 16, wherein the multicast first feedback resource is: time-frequency resources;
the dedicated feedback resources of the receiving node are: dedicated time-frequency codeword resources.
19. The receiving node of claim 18, wherein the transceiver is further configured to:
receiving a resource multiplexing coefficient configured by the sending node or the high layer, wherein the resource multiplexing coefficient is as follows: the maximum code division multiplexing node number of the first feedback resource;
the processor is further configured to:
if the resource multiplexing coefficient is greater than or equal to the total number of the effective receiving nodes in the group, determining that the allocation principle of the first feedback resource is as follows: allocating different codewords of the first feedback resource to different receiving nodes;
if the resource multiplexing coefficient is smaller than the total number of the effective receiving nodes in the group, determining that the allocation principle of the first feedback resource is as follows: and dividing the frequency domain of the first feedback resource according to the total number of the effective receiving nodes to obtain at least two sub-feedback resources, and allocating different code words of the sub-feedback resources to different receiving nodes.
20. The receiving node according to claim 19, wherein the higher layer configured resource multiplexing coefficient comprises:
the resource multiplexing coefficient configured in the multicast connection establishing process through the PC5 interface;
alternatively, the first and second electrodes may be,
and resource multiplexing coefficients configured through a Uu interface of the system.
21. The receiving node of claim 20, wherein the processor is further configured to:
and determining code word information and/or frequency domain information of the dedicated feedback resources of the receiving node according to the determined allocation principle of the first feedback resources and the receiving group number of the receiving node.
22. The receiving node of claim 16, wherein the transceiver is further configured to:
receiving a group establishing number distributed by a sending node for the receiving node;
alternatively, the first and second electrodes may be,
and receiving the group establishing number distributed by the network side equipment for the receiving node.
23. The receiving node of claim 22, wherein the processor is further configured to:
and determining the receiving group number of the receiving node in the group according to the group establishing group number of the receiving node, the group establishing group number of the effective receiving node in the group and the number of the effective receiving nodes in the group.
24. The receiving node according to claim 18, wherein the size of the frequency domain resource of the dedicated feedback resource of the receiving node is a pre-configured fixed value.
25. An apparatus for determining multicast feedback resources, applied to a receiving node of a multicast, includes:
the receiving module is used for receiving indication information sent by a multicast sending node, wherein the indication information is used for indicating a first feedback resource of multicast;
a first determining module, configured to determine, according to the first feedback resource indicated by the indication information and the receiving group number of the receiving node, a dedicated feedback resource of the receiving node.
26. A transmitting node, comprising: a transceiver, a memory, a processor, and a program stored on the memory and executable on the processor; it is characterized in that the preparation method is characterized in that,
the processor is used for reading the program in the memory and executing the following processes: determining a first feedback resource of multicast;
the transceiver is configured to send indication information to a receiving node of a multicast, where the indication information is used to indicate a first feedback resource of the multicast.
27. The transmitting node of claim 26, wherein the processor is further configured to:
determining the size of feedback resources required by multicast according to the total number of effective receiving nodes in the group, the resource multiplexing coefficient and the size of the frequency domain resources of the special feedback resources of the pre-configured receiving nodes; wherein the resource multiplexing coefficient is: the maximum code division multiplexing node number of the first feedback resource;
and determining the first feedback resource of the multicast according to the size of the feedback resource required by the multicast.
28. The transmitting node of claim 27, wherein the processor is further configured to:
indicating the size of the feedback resource required by the multicast to network side equipment, and determining a first feedback resource distributed for the multicast by the network side equipment according to the size of the feedback resource required by the multicast;
alternatively, the first and second electrodes may be,
and according to the size of the feedback resource required by the multicast, autonomously determining the first feedback resource of the multicast.
29. The transmitting node of claim 26, wherein the transceiver is further configured to:
indicating the total number of the effective receiving nodes in the group to network side equipment;
the processor is further configured to:
and determining a first feedback resource allocated for multicast by the network side equipment according to the total number of the effective receiving nodes in the group, the resource multiplexing coefficient and the pre-configured frequency domain resource of the special feedback resource of the receiving nodes.
30. Transmitting node according to claim 27 or 29, wherein the size of the frequency domain resource of the dedicated feedback resource of the receiving node is a pre-configured fixed value.
31. The transmitting node according to claim 27, wherein the resource multiplexing coefficient is:
the resource multiplexing coefficient configured in the multicast connection establishing process through the PC5 interface;
alternatively, the first and second electrodes may be,
and resource multiplexing coefficients configured through a Uu interface of the system.
32. A device for determining multicast feedback resources, applied to a sending node in a multicast, comprising:
the second determining module is used for determining the first feedback resource of the multicast;
and the sending module is used for sending indication information to the multicast receiving node, wherein the indication information is used for indicating the multicast first feedback resource.
33. A computer-readable storage medium, on which a computer program is stored which, when being executed by a processor, carries out the steps of the method for determining multicast feedback resources according to any one of claims 1 to 9; alternatively, the computer program when being executed by a processor realizes the steps of the method for determining multicast feedback resources according to any of the claims 10-15.
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