CN112398584B

CN112398584B - Method and device for determining resource occupation state and terminal

Info

Publication number: CN112398584B
Application number: CN201910744192.XA
Authority: CN
Inventors: 赵丽; 胡金玲; 赵锐; 郑石磊
Original assignee: 大唐高鸿智联科技(重庆)有限公司
Current assignee: Datang Gaohong Zhilian Technology Chongqing Co ltd
Priority date: 2019-08-13
Filing date: 2019-08-13
Publication date: 2022-04-22
Anticipated expiration: 2039-08-13
Also published as: WO2021027467A1; CN112398584A

Abstract

The invention provides a method, a device and a terminal for determining a resource occupation state, wherein the method comprises the following steps: acquiring transmission state information associated with a data packet to be transmitted of a first node; and determining the occupation state of the resource for transmitting the data packet to be transmitted according to the transmission state information. According to the invention, by determining the occupation state of the resource of the first node for transmitting the data packet to be transmitted, when the retransmission resource selected but not used by the first node is determined to be in the release state, the retransmission resource released by the first node can be utilized, the selectable resource ratio is improved, the probability of resource collision is effectively reduced, and the resource utilization rate of the system and the reliability of service transmission in the system are improved.

Description

Method and device for determining resource occupation state and terminal

Technical Field

The present invention relates to the field of communications technologies, and in particular, to a method, an apparatus, and a terminal for determining a resource occupation state.

Background

The internet of vehicles is a new development direction of automobile technology combining technologies such as navigation positioning, wireless communication and remote sensing. With the rapid development of the internet of vehicles, wireless communication and information exchange can be performed between vehicles and X (X: vehicles, roads, pedestrians, the Internet and the like), and the internet of vehicles can realize intelligent traffic management, intelligent dynamic information service and intelligent control of vehicles. In the internet of vehicles, communication can be performed among a base station, an On Board Unit (OBU), and a Road Side Unit (RSU) to transmit and process vehicle to outside information exchange V2X (vehicle to X, abbreviated as V2X) traffic.

In 5G NR (New Radio) V2X, V2X services with higher service requirements, such as service applications of Automatic driving, vehicle formation, remote driving, sensor sharing, etc., need to be supported, and in order to support a stricter high reliability requirement required by the service applications, multiple Hybrid Automatic Repeat reQuest (HARQ) processes with multiple retransmissions need to be adopted, so as to improve the reliability of transmission.

In the HARQ mechanism, a transmitting end determines whether to perform incomplete retransmission of subsequent times by receiving HARQ feedback of a receiving end for a previously transmitted data packet. If the sending end A and the receiving end B are a receiving-sending node pair, the sending end A transmits the data packet to the receiving end B through multiple retransmission resources corresponding to a certain process, and when the receiving end B receives the data packet successfully and feeds back ACK (acknowledgement character), the sending end A does not send the retransmission data packet which is not transmitted completely and releases the allocated retransmission resources. That is, assuming that there are 8 HARQ processes, the sending end a sends a data packet in the 1 st HARQ process, and plans to perform 4 transmissions, and the sending end a receives ACK after the 2 nd transmission of the HARQ process 1, at this time, the sending end a needs to cancel the unfinished 3 rd and 4 th transmissions on the HARQ process 1 and release the allocated 3 rd and 4 th retransmission resources. However, in the prior art, for other receiving terminals C that are not transceiver pairs, it cannot be perceived whether the transmitting terminal a cancels the 3 rd and 4 th transmissions, and it may still be considered that resources corresponding to the 3 rd and 4 th transmissions are in an occupied state. Therefore, when a receiving end which is not a transceiver node pair selects resources, the proportion of available retransmission resources is low, and the probability of collision of the selected retransmission resources is increased.

Disclosure of Invention

In order to solve the technical problem, the invention provides a method, a device and a terminal for determining a resource occupation state, which solve the problem that the collision probability of selected resources is increased due to low available resource ratio caused by the fact that released retransmission resources cannot be acquired.

The embodiment of the invention provides a method for determining a source occupation state, which comprises the following steps:

acquiring transmission state information associated with a data packet to be transmitted of a first node;

and determining the occupation state of the resource for transmitting the data packet to be transmitted according to the transmission state information.

Optionally, the transmission status information includes at least one of:

feedback information sent by a second node to the first node, wherein the feedback information is used for indicating the receiving state of the second node to the data packet to be sent;

control channel information carried on a control channel of the first node;

physical layer measurement results.

Optionally, if the transmission state information does not include the feedback information but at least includes the control channel information, determining, according to the transmission state information, an occupation state of a resource used for transmitting the data packet to be transmitted, including:

and determining the occupation state of the resource for transmitting the data packet to be transmitted according to the control channel information.

Optionally, when the transmission state information does not include the feedback information and the control channel information, determining an occupation state of a resource used for transmitting the data packet to be transmitted according to the transmission state information includes:

and determining the occupation state of the resource for transmitting the data packet to be transmitted according to the physical layer measurement result.

Optionally, when the transmission state information at least includes the feedback information, determining, according to the transmission state information, an occupation state of a resource used for transmitting the data packet to be transmitted, including:

and determining the occupation state of the resource for transmitting the data packet to be transmitted according to the feedback information.

Optionally, determining, according to the control channel information, an occupation state of a resource used for transmitting the data packet to be transmitted, includes:

determining the occupation state of resources for transmitting the data packet to be transmitted according to HARQ process information in the control channel information;

wherein the HARQ process information comprises: and the first process corresponds to an original service data packet to be sent by the first node and the second process corresponds to a newly added service data packet to be sent by the first node.

Optionally, determining an occupation state of a resource used for transmitting the data packet to be transmitted according to HARQ process information in the control channel information includes:

if the first process is the same as the second process, determining an occupation state of resources for transmitting the original service data packet according to a New Data Indication (NDI) in the control information;

and if the first process is different from the second process, determining the occupation state of the resource for transmitting the original service data packet according to the first resource of the repeated retransmission of the original service data packet and the second resource of the repeated retransmission of the newly increased service data packet.

Optionally, determining an occupation state of a resource used for transmitting an original service data packet according to a New Data Indicator (NDI) in the control information, includes:

if the NDI is not turned over, judging that the resources for transmitting the original service data packet are in a release state when detecting that the original service data packet is subjected to resource reselection; otherwise, judging that the resources for transmitting the original service data packet are in an occupied state;

and if the NDI is overturned, judging that the resource for transmitting the original service data packet is in a release state.

Optionally, determining a resource occupation state for transmitting the original service data packet according to the first resource of the multiple retransmissions of the original service data packet and the second resource of the multiple retransmissions of the newly added service data packet, including:

if the first resource and the second resource are overlapped, judging that the resource for transmitting the original service data packet is in a release state; otherwise, judging that the resource for transmitting the original service data packet is in an occupied state.

Optionally, the physical layer measurement result is obtained by measuring a physical layer corresponding to the current retransmission at the retransmission time of the data packet to be transmitted;

the physical layer measurement results include at least one of: the Signal Received Power RSRP of the control channel, the Signal Received Power RSRP of the traffic channel, the Received Signal Strength Indication RSSI (Received Signal Strength Indication, RSSI) of the sub-channel, and the channel estimation result of the sub-channel.

Optionally, determining, according to the physical layer measurement result, an occupation state of a resource used for transmitting the data packet to be transmitted, includes:

if the RSRP of the control channel is larger than a first threshold value, judging that resources for transmitting the data packet to be transmitted are in an occupied state; otherwise, judging that the resource for transmitting the data packet to be transmitted is in a release state; or

If the RSRP of the service channel is larger than a second threshold value, judging that resources for transmitting the data packet to be transmitted are in an occupied state; otherwise, judging that the resource for transmitting the data packet to be transmitted is in a release state; or

If the RSSI of the sub-channel is greater than a third threshold value, judging that resources used for transmitting the data packet to be transmitted are in an occupied state; otherwise, judging that the resource for transmitting the data packet to be transmitted is in a release state; or

If the control information and the service data of the first node are determined to be sent on the selected resources of the data packet to be sent according to the channel estimation result, judging that the resources for transmitting the data packet to be sent are in an occupied state; otherwise, judging that the resource for transmitting the data packet to be transmitted is in a release state.

An embodiment of the present invention further provides a device for determining a resource occupation state, including:

a first obtaining module, configured to obtain transmission state information associated with a to-be-sent data packet of a first node;

and the first processing module is used for determining the occupation state of the resource for transmitting the data packet to be transmitted according to the transmission state information.

An embodiment of the present invention further provides a terminal, including: the transceiver, processor, memory and the memorizer have the executable procedure of the said processor, when the said processor carries out the said procedure, realize:

and acquiring the occupation state of the resource for transmitting the data packet to be transmitted according to the transmission state information.

An embodiment of the present invention further provides a computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, implements the steps of the method for determining a resource occupation state as described above.

The technical scheme of the invention has the beneficial effects that:

according to the embodiment of the invention, the transmission state information associated with the data packet to be sent of the first node is acquired; and determining the occupation state of the resource for transmitting the data packet to be transmitted according to the transmission state information. The method solves the problem that when a node which is not a transceiving node pair with the first node selects resources, the resource occupation state of a data packet to be transmitted of the first node cannot be perceived and acquired, so that retransmission resources released by the first node cannot be utilized, the selectable retransmission resources are low in proportion, and the probability of collision of the selected retransmission resources is increased.

Drawings

Fig. 1 is a flowchart of a method for determining a resource occupation state according to an embodiment of the present invention;

FIG. 2 is a schematic diagram of a unicast mode according to an embodiment of the present invention;

fig. 3 is a schematic diagram illustrating a multicast mode according to an embodiment of the present invention;

FIG. 4 is a schematic diagram illustrating a resource occupation state according to an embodiment of the present invention;

FIG. 5 is a second schematic diagram illustrating resource occupation status according to an embodiment of the present invention;

FIG. 6 is a third schematic diagram illustrating resource occupation status according to an embodiment of the present invention;

FIG. 7 is a fourth schematic diagram illustrating resource occupation status according to an embodiment of the present invention;

FIG. 8 is a fifth schematic diagram illustrating resource occupation status according to an embodiment of the present invention;

FIG. 9 is a sixth schematic view of a resource occupation state according to an embodiment of the present invention;

FIG. 10 is a seventh schematic diagram illustrating resource occupation status according to an embodiment of the present invention;

FIG. 11 is a diagram illustrating an eighth resource occupancy state according to an embodiment of the present invention;

FIG. 12 is a ninth schematic diagram illustrating resource occupancy states according to an embodiment of the present invention;

FIG. 13 is a ten-way diagram illustrating resource occupancy in accordance with an embodiment of the present invention;

fig. 14 is a block diagram showing a configuration of a resource occupation state determination apparatus according to an embodiment of the present invention;

fig. 15 is a block diagram showing a configuration of a terminal according to an 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. In the following description, specific details such as specific configurations and components are provided only to help the full understanding of the embodiments of the present invention. Thus, it will be apparent to those skilled in the art that various changes and modifications may be made to the embodiments described herein without departing from the scope and spirit of the invention. In addition, descriptions of well-known functions and constructions are omitted for clarity and conciseness.

It should be appreciated that reference throughout this specification to "one embodiment" or "an embodiment" means that a particular feature, structure or characteristic described in connection with the embodiment is included in at least one embodiment of the present invention. Thus, the appearances of the phrases "in one embodiment" or "in an embodiment" in various places throughout this specification are not necessarily all referring to the same embodiment. Furthermore, the particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

In various embodiments of the present invention, it should be understood that the sequence numbers of the following processes do not mean the execution sequence, and the execution sequence of each process should be determined by its function and inherent logic, and should not constitute any limitation to the implementation process of the embodiments of the present invention.

In addition, the terms "system" and "network" are often used interchangeably herein.

In the embodiments provided herein, it should be understood that "B corresponding to a" means that B is associated with a from which B can be determined. It should also be understood that determining B from a does not mean determining B from a alone, but may be determined from a and/or other information.

In the embodiment of the present invention, the access network may be an access network including a Macro Base Station (Macro Base Station), a micro Base Station (Pico Base Station), a Node B (3G mobile Station), an enhanced Base Station (eNB), a Home enhanced Base Station (Femto eNB or Home eNode B or Home eNB or HeNB), a relay Station, an access point, an RRU (Remote Radio Unit), an RRH (Remote Radio Head), and the like. The user terminal may be a mobile phone (or handset), or other device capable of sending or receiving wireless signals, including user Equipment, a Personal Digital Assistant (PDA), a wireless modem, a wireless communicator, a handheld device, a laptop computer, a cordless phone, a Wireless Local Loop (WLL) station, a CPE (Customer Premise Equipment) or a mobile smart hotspot capable of converting mobile signals into WiFi signals, a smart appliance, or other devices capable of autonomously communicating with a mobile communication network without human operation, and so on.

Specifically, the embodiment of the present invention provides a method for determining a resource occupation state, which solves the problem that the collision probability of a selected resource is increased due to a low available resource ratio caused by that other receiving ends that are not a transceiver node pair cannot acquire released retransmission resources.

First embodiment

As shown in fig. 1, an embodiment of the present invention provides a method for determining a resource occupation state, which specifically includes the following steps:

step 21, transmission state information associated with a data packet to be sent of the first node is obtained.

In this embodiment, the first node may be a terminal device, where the terminal device includes, but is not limited to, a vehicle-mounted terminal device and a drive test device. The data packet to be sent is a service packet to be processed and sent by the first node. And the transmission state information reflects the transmission condition of the data packet to be transmitted. Optionally, the transmission status information includes at least one of: feedback information sent by a second node (the second node and the first node are a transceiving node pair) to the first node, wherein the feedback information is used for indicating the receiving state of the second node on the data packet to be sent; control channel information carried on a control channel PSCCH (Physical downlink control channel, PSCCH for short) of the first node; physical layer measurement results.

It should be noted that the control channel information may include, but is not limited to, the following information: if the scheduling is semi-persistent scheduling, the scheduling comprises time frequency resource information corresponding to multiple transmissions of a reserved data packet sent in the next period and time frequency resource information selected by multiple retransmissions of the data packet expected to be transmitted in the period. In addition, in order to distinguish resource reservation in a cycle under one packet (or Transport Block TB) and reservation between multiple transmissions of the same packet, the reservation between the multiple transmissions of the same packet is described as instruction information. In addition, the control channel information further includes HARQ process information corresponding to a current data packet to be transmitted, a new data indication NDI, and a Redundancy version, RV (Redundancy version, RV for short).

Further, the feedback information may include, but is not limited to: an ACK to indicate that the data packet has been retransmitted successfully and a NACK to indicate that the data packet has been retransmitted unsuccessfully. It can be understood that, when a receiving node (referring to a second node which is a transceiver node pair with the first node) receives a data packet sent by a sending node (the first node) on a certain HARQ process and decoding is successful, the receiving node (the second node) feeds back an ACK to the sending node; if the receiving and decoding are unsuccessful, NACK is fed back to the sending node, and if the receiving node does not feed back any information, the sending node defaults that the feedback information is NACK.

The physical layer measurement result is obtained by measuring the physical layer corresponding to the current retransmission at the retransmission time of the data packet to be transmitted; the physical layer measurement results include at least one of: the signal receiving power RSRP of the control channel, the signal receiving power RSRP of the traffic channel, the received signal strength indication RSSI of the sub-channel and the channel estimation result of the sub-channel.

It should be noted that the second node may be a terminal device, and the terminal device includes, but is not limited to, a vehicle-mounted terminal device and a drive test device.

Step 22, determining the occupation state of the resource for transmitting the data packet to be transmitted according to the transmission state information.

Fig. 2 is a schematic diagram illustrating a unicast manner, that is, a first node and a second node are in a one-to-one communication manner, that is, a sending node is the first node, and a receiving node is the second node, that is, the first node and the second node are transceiver node pairs.

Fig. 3 shows a schematic diagram of a multicast scheme, that is, a sending node (a first multicast sender), a receiving node (a multicast destination receiver) is a node B, and a node C and a node D.

The third node in fig. 2 and 3 is a non-target receiving node, and the third node and the first node are not a transceiving node pair.

The first node, the second node and the third node may be respectively a terminal device, and the terminal device includes but is not limited to a vehicle-mounted terminal device and a drive test device.

It can be understood that, when a non-target receiving end (third node) needs to perform resource selection, the occupation state of the selected retransmission resource of the data packet to be transmitted processed by the first node may be determined by receiving the control channel information carried by the control channel of the transmitting node (first node), or by acquiring the feedback information, or by acquiring the physical layer measurement result, and when it is determined that the retransmission resource corresponding to the data packet to be transmitted is in a release state, the released uncompleted retransmission resource may be used as an alternative resource for resource selection, thereby increasing the ratio of available resources, increasing the available resources, and effectively reducing the probability of resource collision.

Further, when the third node (non-target receiving end) needs to determine the occupation state of the resource that has been selected by the first node for transmitting the data packet to be sent, the following three conditions are mainly included:

situation one

If the transmission state information does not include the feedback information but at least includes the control channel information, determining an occupation state of a resource for transmitting the data packet to be transmitted according to the transmission state information, including: and determining the occupation state of the resource for transmitting the data packet to be transmitted according to the control channel information.

In this embodiment, if the system limits the non-target receiving end to detect the feedback channel in consideration of power saving or in consideration of security and privacy protection of the receiving and transmitting nodes, the non-target receiving end cannot detect the feedback channel between the receiving and transmitting nodes, and the non-target receiving end cannot judge the receiving condition of the receiving node for retransmitting the data packet for multiple times to the transmitting node through the feedback information in the feedback channel, so that only the control channel of the transmitting node can be detected, and the occupation state of the resource for transmitting the data packet to be transmitted is determined through the control channel information. It can be understood that if the resource is judged to be in the occupied state, the resource cannot be selected for use, and if the resource is judged to be in the release state, the resource can be selected for use, so that the selectable retransmission resource is increased, the probability of collision and conflict of the resource is reduced, and the resource utilization rate and the transmission reliability in the system are improved.

In an optional embodiment of the present invention, determining, according to the control channel information, an occupation state of a resource used for transmitting the data packet to be transmitted may include:

determining the occupation state of resources for transmitting the data packet to be transmitted according to HARQ process information in the control channel information; wherein the HARQ process information comprises: and the first process corresponds to an original service data packet to be sent by the first node and the second process corresponds to a newly added service data packet to be sent by the first node.

In this embodiment, the HARQ process information may refer to a process number of HARQ. Such as HARQ process 1, HARQ process 2, HARQ process 3, etc. Generally, a plurality of HARQ incoming packets are transmitted in parallel on a transmission physical channel to process transmission of a data packet, where the first process refers to an HARQ process number corresponding to an original service data packet to be transmitted of the first node, and the second process refers to an HARQ process number corresponding to a newly added service data packet to be transmitted of the first node. Because the number of HARQ processes is fixed, and the number of HARQ processes is related to Round trip time RTT (RTT for short) of the HARQ process, it can be understood that the HARQ process for processing the original service data packet may be the same as or different from the HARQ process for processing the newly added service data packet. Based on this, when the resource selection time of the non-target receiving end (third node) is that the first node has a newly added service data packet for transmission, the occupation state of the allocated resources of the original service data packet in the data packet to be sent processed by the first node can be judged through the HARQ process.

In an optional embodiment of the present invention, determining an occupation state of a resource used for transmitting the data packet to be transmitted according to HARQ process information in the control channel information may include:

and if the first process is the same as the second process, determining the occupation state of resources for transmitting the original service data packet according to the new data indication NDI in the control information.

In this embodiment, the first process and the second process are the same, which means that the HARQ process of the original service data packet and the HARQ process of the newly added service data packet, which are processed and sent by the first node, are the same. The new data indication NDI is used to indicate whether the data packet transmitted this time is a retransmission data packet (the original service data packet) or a first transmission data packet (a newly added service data packet), and the indication function is completed by using the inversion of one bit. In the same HARQ process, if the NDI received in the previous transmission is 1 and the NDI received in the current transmission is 0, the NDI is turned over at the moment, and the currently received data packet is a new data packet; the previous NDI is 0, the currently received NDI is 1, and NDI inversion also indicates that the currently received data packet is a new data packet.

In an optional embodiment of the present invention, determining, according to a new data indication NDI in the control information, an occupation state of a resource used for transmitting an original service data packet, includes:

if the NDI is overturned, judging that the resource for transmitting the original service data packet is in a release state

In this embodiment, if the NDI is not inverted, which means that the NDI indicates that the original service data packet is retransmitted at a certain time, it is necessary to combine whether the original service data packet is subjected to resource reselection, that is, whether the original service data packet reselects a retransmission resource, and if so, an unfinished (non-performed) retransmission resource before the resource reselection indicated by the original service data packet is in a release state. Further, if the NDI is flipped, it may be considered that the original service data packet has been transmitted, and an unfinished (not performed) retransmission resource of the original service data packet is in a release state.

Specifically, determining an occupation state of a resource used for transmitting the original service data packet according to the new data indication NDI in the control information may specifically include:

and determining the occupation state of the resources for transmitting the original service data packet according to the new data indication NDI and the redundancy version RV in the control information.

It should be noted that the RV is designed to implement incremental redundancy HARQ transmission, each RV defines 1 transmission starting point, and the first transmission and each HARQ retransmission use different RVs, respectively, to implement gradual accumulation of redundancy bits and complete incremental redundancy HARQ operations. That is, the value of RV is used to identify the transmission of the packet for the second time, i.e., the transmission sequence. In this embodiment, the occupation state of the resource used for transmitting the original service data packet is determined according to the NDI and the RV.

With reference to fig. 4 and fig. 5, a case where the first process and the second process are the same is described below with reference to a specific example as follows:

now assume that there are 8 HARQ processes in the system. The non-target receiving end node cannot receive the feedback channel of the transmitting node. The non-target receiving end (third node) receives the control channel of the sending node (first node), and perceives the occupation condition of the resource according to the time-frequency resource of 4 transmissions of the sending data packet of the sending node.

Assume that the HARQ process in which the non-target receiving end node receives the original service data packet (packet1) sent by the sending node is HARQ process 2, the sending node receives ACK fed back by the receiving node after the 2 nd transmission (identified as 2 nd in fig. 4 and 5), and the sending node cancels the 3 rd and 4 th transmissions.

Here, assume 4 transmissions set by the system, with RV order being {0, 2, 3, 1 }. It can be understood that if NDI is turned over and RV is 0, it represents the 1 st transmission of a new packet with RV of 0 transmitted on HARQ process 2; if NDI is not flipped and RV is 2 or 3 or 1, it indicates 2 or 3 or 4 retransmissions of the packet corresponding to RV transmitted on HARQ process 2.

The following briefly describes two situations of NDI not flipped and NDI flipped with reference to fig. 4 and 5:

the first method comprises the following steps: NDI did not flip

As shown in fig. 4, assume that a non-target receiving node needs to perform resource selection at time T in fig. 4, which is before the 3 rd retransmission time.

If the received NDI is not flipped, it indicates that it is a retransmission of the original service packet (packet 1). The determining of the resource reselection of the original service data packet may include: if the RV is obtained as a 3 rd retransmission value before the 3 rd retransmission at time T, it indicates that the transmitting node performs retransmission resource reselection on the 3 rd transmission of packet1, and may determine that resource reselection occurs on the original service data packet. In this case, the non-target receiving node may consider that the 3 rd transmission resource originally occupied by the sending node is released. And sensing the resource occupation condition according to the time-frequency resource indicated by the newly received and reselected control channel for the 3 rd retransmission. If the sending node reserves the 3 rd transmission to be associated with the 4 th transmission, the sending node releases the retransmission resource of the 3 rd transmission occupied by the original indication and also releases the retransmission resource of the 4 th transmission occupied originally.

And the second method comprises the following steps: NDI rollover

As shown in fig. 5, it is assumed that the non-target receiving node acquires, between the 2 nd transmission and time T (time at which the non-target receiving node needs to perform resource selection), a new service data packet (packet2) whose HARQ process of the first node is HARQ process 2. The black squares in fig. 5 are 4 transmissions corresponding to packet 2.

If the received NDI is turned over, and the RV value is indicated as initial transmission, it indicates that the non-target receiving node receives a new service data packet (packet2) started by the sending node on HARQ process 2. The current HARQ process 2 is the initial transmission of packet2, and the non-target receiving node may consider packet1 to have completed transmission, i.e., packet1 has the 3 rd and 4 th retransmissions cancelled by the sending node.

If the NDI is turned over, the RV is a possible value other than the initial transmission, and the non-target receiving node receives a new service data packet (packet2) started by the sending node on HARQ process 2. The current HARQ process 2 performs a certain retransmission of packet2, the initial transmission and the retransmission before the current retransmission may not be received by the non-target receiving node, and the non-target receiving node may consider that packet1 has completed transmission, that is, packet1 has cancelled the 3 rd retransmission and the 4 th retransmission by the sending node.

In an optional embodiment of the present invention, determining an occupation state of a resource used for transmitting the data packet to be transmitted according to HARQ process information in the control channel information may further include:

In this embodiment, the difference between the first process and the second process indicates that the HARQ process of the original service data packet and the HARQ process of the newly added service data packet, which are processed and sent by the first node, are different.

In an optional embodiment of the present invention, determining a resource occupation state for transmitting the original service data packet according to the first resource of the multiple retransmissions of the original service data packet and the second resource of the multiple retransmissions of the newly added service data packet includes:

In this embodiment, if the time-frequency resource (second resource) of the multiple retransmissions of the newly added service data packet in the control channel of the sending node (first node) coincides with the time-frequency resource (first resource) of the multiple retransmissions of the original service data packet, it indicates that the time-frequency resource of the multiple retransmissions corresponding to the original service data packet processed by the sending node has been allocated to other HARQ processes for use. It can be understood that, in this case, it can be determined that the incomplete retransmission resource corresponding to the original service data packet is in a release state; if the time-frequency resource of the repeated retransmission of the newly added service data packet in the control channel of the sending node does not coincide with the time-frequency resource of the repeated retransmission of the original service data packet, it cannot be described whether the time-frequency resource of the data to be retransmitted of the original data packet is occupied by the sending node. This situation can determine that the uncompleted retransmission resource corresponding to the original service data packet is in an occupied state.

With reference to fig. 6 and fig. 7, a description is given below of a case where the first process and the second process are different, with reference to a specific example, as follows:

now assume that there are 8 HARQ processes in the system. The non-target receiving end node cannot receive the feedback channel of the transmitting node. The non-target receiving end (third node) receives the control channel of the sending node (first node), and perceives the occupation situation of the resources according to the time-frequency resources of 4 transmissions of the sending data packet of the sending node.

Assume that a non-target receiving node needs to make resource selection at time T, which is before the 3 rd retransmission time in fig. 6. Further, assume that a non-target receiving node receives a new service data packet (packet2) with HARQ process processed by the first node as HARQ process 3 between the 2 nd transmission and time T, and black squares in fig. 6 and 7 are 4 transmissions corresponding to the packet 2.

As shown in fig. 6, the HARQ process in the control channel received by the non-target receiving node to the transmitting node is 3, which is different from the process of the HARQ process 2 corresponding to the 3 rd time and the 4 th time of the uncompleted retransmission. The time frequency resource indicated on the current sending node control information HARQ process 3 is partially overlapped with the time frequency resource of the 3 rd time and the 4 th time of the original data packet. In this case, since the time-frequency resource of the data to be retransmitted of the original service data packet has been allocated to other HARQ processes (HARQ process 3) for use, the sending node may consider that the time-frequency resource of the data to be retransmitted, which is not completed by the original service data packet, is available. The non-target receiving end node considers the 3 rd retransmission resource and the 4 th retransmission resource which are not completed by the original data packet to be in the release state.

As shown in fig. 7, the HARQ process received by the non-target receiving node in the control channel of the transmitting node is 3, which is different from the HARQ process 2 corresponding to the 3 rd time and the 4 th time of the uncompleted retransmission. The time frequency resource indicated on the current sending node control information HARQ process 3 is not overlapped with the time frequency resource of the 3 rd time and the 4 th time of the original data packet. In this case, it cannot be described whether the time-frequency resource of the 3 rd and 4 th transmissions of the data to be retransmitted of the original data packet is occupied by the sending node. The non-target receiving end can only consider the incomplete retransmission resource of the original service data packet to be still in an occupied state.

Situation two

When the transmission state information does not include the feedback information and the control channel information, determining an occupation state of resources for transmitting the data packet to be transmitted according to the transmission state information, including:

In this embodiment, the physical layer measurement result is obtained by measuring the physical layer corresponding to the current retransmission at the retransmission time of the data packet to be transmitted; the physical layer measurement results include at least one of: the signal receiving power RSRP of the control channel, the signal receiving power RSRP of the traffic channel, the received signal strength indication RSSI of the sub-channel and the channel estimation result of the sub-channel.

As shown in fig. 8, it is assumed that the HARQ process in which the non-target receiving end node receives the original service data packet (packet1) processed by the sending node is HARQ process 2, the sending node receives ACK fed back by the receiving node after 2 nd transmission (2 nd time identified in fig. 8), and the sending node cancels the 3 rd and 4 th transmissions. Assume that a non-target receiving node needs to make a resource selection at time T.

It should be noted that, if the resource selection triggering time of the non-target receiving end (the third node) is before the retransmission time of the original service data packet, the non-target receiving end cannot receive any information of the sending node (the first node), and only can consider that the incomplete retransmission resource of the original service data packet of the sending node is in an occupied state.

In an optional embodiment of the present invention, determining, according to the physical layer measurement result, an occupation state of a resource used for transmitting the data packet to be transmitted includes:

As shown in fig. 9, it is assumed that the HARQ process in which the non-target receiving end (third node) receives the original service data packet (packet1) processed by the sending node is HARQ process 2, the sending node receives ACK fed back by the receiving node after 2 nd transmission (2 nd time identified in fig. 9), and the sending node cancels the 3 rd and 4 th transmissions. Assume that a non-target receiving node needs to make a resource selection at time T.

In fig. 9, the resource selection triggering time T of the non-target receiving end is at the transmission time to be retransmitted of the packet1, so that the non-target receiving end node may perform the following processing according to the time-frequency resource of the 3 rd retransmission indicated by the transmission before the original packet1 of the sending node a:

(1) with RSRP measurement on the control channel PSCCH: the non-target receiving node measures the RSRP of the PSCCH indicating the 3 rd retransmission, and if the RSRP of a measuring signal exceeds a preset threshold (a first threshold), the sending end node is considered to still occupy the wireless resources of the uncompleted retransmission; otherwise, the non-target receiving node considers that the sending end node cancels the wireless resource of the uncompleted retransmission.

(2) Using RSRP measurement of the traffic channel psch (psch): the non-target receiving node measures RSRP of a service channel PSSCH indicating 3 rd retransmission, and if the RSRP of a measuring signal exceeds a preset threshold (a second threshold), the sending end node is determined to still occupy the unfinished retransmission radio resource; otherwise, the non-target receiving node considers that the sending end node cancels the wireless resource of the uncompleted retransmission.

(3) With subchannel RSSI measurements on outstanding retransmissions: the non-target receiving node measures the RSSI of the sub-channel indicating the 3 rd retransmission, and if the measured RSSI exceeds a preset threshold (a third threshold), the transmitting end node is determined to still occupy the unfinished retransmission wireless resource; otherwise, the non-target receiving node considers that the sending end node cancels the wireless resource of the uncompleted retransmission.

(4) Performing channel estimation by using wireless resources with uncompleted retransmission: the non-target receiving node carries out channel estimation on the sub-channel indicating the 3 rd retransmission, and after the channel estimation processing, if the transmitting node is determined to have control information and service data to be transmitted on the time-frequency resource corresponding to the 3 rd retransmission according to the channel estimation result, the transmitting node is considered to still occupy the wireless resource of the uncompleted retransmission; otherwise the non-target receiving node determines that the wireless resource of the uncompleted retransmission has been cancelled by the transmitting node.

It should be noted that the signal received power RSRP of the control channel, the signal received power RSRP of the traffic channel, the received signal strength indicator RSSI of the subchannel, and the channel estimation result of the subchannel may be used alternatively or in combination.

Situation three

When the transmission state information at least includes the feedback information, determining an occupation state of a resource for transmitting the data packet to be transmitted according to the transmission state information, including: and determining the occupation state of the resource for transmitting the data packet to be transmitted according to the feedback information.

In this embodiment, when the non-target receiving end (third node) can receive the feedback channel, the multiple transmission condition between the pair of the transceiving nodes a and B can be determined through the feedback information.

As shown in fig. 10, it is assumed that the sending node (first node) selects the time-frequency resource for 4 transmissions, and the non-target receiving end calculates the time-frequency resource occupied by the feedback channel according to the information such as the Identity ID (Identity, abbreviated as ID) of the receiving and sending node. For clarity of description, the following description is made with respect to specific examples:

as shown in fig. 10, it is assumed that the HARQ process of the original service data packet (packet1) received by the non-target receiving end is HARQ process 2, the sending node receives ACK fed back by the receiving node after 2 nd transmission (identified as 2 nd time in fig. 10), and the sending node cancels the 3 rd and 4 th transmissions. The non-target receiving end receives the feedback channel and judges the multiple transmission condition between the receiving and transmitting node pairs:

when the receiving node feeds back NACK to the 1 st transmission, the non-target receiving node can consider that the sending node continues to perform unfinished subsequent retransmission (2 nd, 3 rd and 4 th transmissions), and the non-target receiving node considers that the reserved subsequent retransmission (2 nd, 3 rd and 4 th transmissions) resources indicated by the sending node continue to be occupied; when the non-target receiving node detects the receiving node feedback ACK on the feedback channel for transmitting the 2 nd transmission, the non-target node considers that the transmitting node cancels the subsequent retransmission (the 3 rd transmission and the 4 th transmission), and the non-target node considers that the transmitting node indicates that the reserved resources of the subsequent retransmission are released for the 3 rd transmission and the 4 th transmission.

In addition, as shown in fig. 11, when the transmitting node does not receive the feedback channel information corresponding to the 1 st transmission, it may be considered that the receiving node fails to receive the 1 st transmission, the transmitting node continues to perform the incomplete subsequent retransmissions (2 nd, 3 rd, and 4 th transmissions), and resources of the subsequent retransmissions reserved by the transmitting node continue to be occupied. The non-target receiving node does not receive the feedback channel information transmitted by the receiving node at the 1 st time, the sending node is considered to continue to perform unfinished subsequent retransmission (2 nd, 3 rd and 4 th transmissions), and resources of the subsequent retransmission reserved by the sending node continue to be occupied until the non-target receiving node detects that the 3 rd transmission fed back by the receiving node is ACK and the HARQ process is the original HARQ process and the NDI is not turned over, the non-target receiving node indicates that the non-target receiving node is the same data packet, and the sending node cancels the 4 th transmission.

For the above three cases (case one, case two, and case three), it should be noted that, as shown in fig. 12 and fig. 13, assuming that the data packet sent by the processing of the sending node is a periodic service, each period includes 4 transmissions, and when the resource allocation and reservation processing is performed by adopting semi-persistent scheduling, the non-target receiving end only considers the occupation or cancellation processing of the retransmission resource in the period of the sending node in the processing of the above three cases, and does not affect the processing of resource reservation in the next period. That is, the resource occupation state of the next cycle cannot be determined according to the resource occupation state of the cycle, that is, the occupation or release state of the reserved resource in the next cycle cannot be determined according to the resource occupation state of the cycle.

As shown in fig. 12, if the 2 nd transmission receives ACK, the 3 rd and 4 th retransmissions subsequent to the current period (period n) are cancelled, but the reserved 4 transmissions of the next period (period n +1) are not affected, i.e., it cannot be determined whether the resources of the 4 transmissions of the next period are released.

As shown in fig. 13, the non-target receiving node does not receive the feedback channel information transmitted by the receiving node at the 1 st time until the non-target receiving node detects that the 3 rd transmission fed back by the receiving node is ACK, so that the 4 th transmission not performed in the present period (period n) is cancelled, but the reserved 4 transmissions in the next period (period n +1) are not affected.

Second embodiment

As shown in fig. 14, an apparatus for determining a resource occupation state according to the present invention includes:

a first obtaining module 1401, configured to obtain transmission state information associated with a to-be-sent data packet of a first node;

a first processing module 1402, configured to determine, according to the transmission status information, an occupation status of a resource used for transmitting the to-be-transmitted data packet.

In an optional embodiment of the present invention, the transmission status information includes at least one of:

control channel information carried on a control channel of the first node;

physical layer measurement results.

In an optional embodiment of the present invention, the first processing module 1402 may include:

and the first processing submodule is used for determining the occupation state of resources used for transmitting the data packet to be transmitted according to the control channel information.

In an optional embodiment of the present invention, the first processing module 1402 may further include:

and the second processing submodule is used for determining the occupation state of resources used for transmitting the data packet to be transmitted according to the physical layer measurement result.

and the third processing submodule is used for determining the occupation state of the resource for transmitting the data packet to be transmitted according to the feedback information.

In an optional embodiment of the present invention, the first processing sub-module may include:

a first processing unit, configured to determine, according to HARQ process information in the control channel information, an occupation state of a resource used for transmitting the data packet to be sent;

In an optional embodiment of the present invention, the first processing unit is further specifically configured to:

In an optional embodiment of the present invention, the physical layer measurement result is obtained by measuring a physical layer corresponding to the current retransmission at the retransmission time of the data packet to be transmitted;

the physical layer measurement results include at least one of: the signal receiving power RSRP of the control channel, the signal receiving power RSRP of the traffic channel, the received signal strength indication RSSI of the sub-channel and the channel estimation result of the sub-channel.

In an optional embodiment of the present invention, the second processing sub-module is further specifically configured to:

The apparatus 1400 is an apparatus corresponding to the above method embodiment, and all implementation manners in the above method embodiment are applicable to the apparatus embodiment, and the same technical effects as the method embodiment can also be achieved, which is not described herein again.

Third embodiment

In order to better achieve the above object, a terminal according to the present invention will be described with reference to the accompanying drawings. The third node may include the terminal, that is, the third node may use the terminal to obtain an occupation state of a resource of the first node, where the resource is used to send the data packet to be sent.

As shown in fig. 15, the present embodiment provides a terminal including: a processor 151; and a memory 153 connected to the processor 151 through a bus interface 152, wherein the memory 153 is used for storing programs and data used by the processor 151 in executing operations, and when the processor 151 calls and executes the programs and data stored in the memory 153, the following steps are implemented:

Among other things, a transceiver 154 is coupled to bus interface 152 for receiving and transmitting data under the control of processor 151.

It should be noted that in FIG. 15, the bus architecture may include any number of interconnected buses and bridges, with one or more processors represented by processor 151 and various circuits of memory represented by memory 153 being linked together. The bus architecture may also link together various other circuits such as peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further herein. The bus interface provides an interface. The transceiver 154 may be a number of elements, including a transmitter and a transceiver, providing a means for communicating with various other apparatus over a transmission medium.

The processor 151 is responsible for managing the bus architecture and general processing, and the memory 153 may store data used by the processor 31 in performing operations.

The processor 151 is further configured to read the computer program and execute the following steps:

optionally, the transmission status information includes at least one of:

control channel information carried on a control channel of the first node;

physical layer measurement results.

When the transmission state information does not include the feedback information but at least includes the control channel information, the processor 151 determines, according to the transmission state information, an occupation state of a resource used for transmitting the data packet to be transmitted, and is further specifically configured to:

If the transmission state information does not include the feedback information and the control channel information, when determining, according to the transmission state information, an occupation state of a resource used for transmitting the data packet to be transmitted, the processor 151 is further specifically configured to:

When the transmission status information at least includes the feedback information, and when determining, according to the transmission status information, an occupation status of a resource used for transmitting the data packet to be transmitted, the processor 151 includes:

When determining, according to the control channel information, an occupation state of a resource used for transmitting the data packet to be transmitted, the processor 151 is further specifically configured to:

When determining the occupation state of the resource used for transmitting the data packet to be transmitted according to the HARQ process information in the control channel information, the processor 151 is further specifically configured to:

When determining the occupation state of the resource used for transmitting the original service data packet according to the new data indication NDI in the control information, the processor 151 is further specifically configured to:

When determining the resource occupation state for transmitting the original service data packet according to the first resource of the multiple retransmissions of the original service data packet and the second resource of the multiple retransmissions of the newly added service data packet, the processor 151 is further specifically configured to:

When determining, according to the physical layer measurement result, an occupation state of a resource used for transmitting the data packet to be transmitted, the processor 151 is further specifically configured to:

The device provided by the embodiment of the present invention may implement the above method embodiment, and the implementation principle and technical effect are similar, which are not described herein again.

Those skilled in the art will appreciate that all or part of the steps for implementing the above embodiments may be performed by hardware, or may be instructed to be performed by associated hardware by a computer program that includes instructions for performing some or all of the steps of the above methods; and the computer program may be stored in a readable storage medium, which may be any form of storage medium.

In the above solution, the non-target receiving end (third node) can receive the control channel of the sending node (first node), but does not receive the feedback channel between the sending and receiving nodes (between the first node and the second node, or between the first node and the node B/C/D), and then processes according to the control channel information on the control channel: the processing may include: the same HARQ process is judged according to the NDI and the RV information; and different HARQ processes are judged according to whether the resources are overlapped. Further, if the control channel information is not received, the resource occupation can be determined according to different processing moments; or determining the resource occupation according to physical layer measurement or channel estimation. If the feedback channel can be obtained, the resource occupation can be determined according to the feedback information of the received feedback channel. When the first node is judged to cancel the unremitted retransmission and release the retransmission resource, the released retransmission resource can be used as an optional resource, the unremitted retransmission resource can be effectively utilized, the resource utilization rate of the system is improved, the reliability of service transmission in the system is improved, further, the ratio of available resources is improved, and the probability of resource collision is effectively reduced.

Furthermore, it is to be noted that in the device and method of the invention, it is obvious that the individual components or steps can be decomposed and/or recombined. These decompositions and/or recombinations are to be regarded as equivalents of the present invention. Also, the steps of performing the series of processes described above may naturally be performed chronologically in the order described, but need not necessarily be performed chronologically, and some steps may be performed in parallel or independently of each other. It will be understood by those skilled in the art that all or any of the steps or elements of the method and apparatus of the present invention may be implemented in any computing device (including processors, storage media, etc.) or network of computing devices, in hardware, firmware, software, or any combination thereof, which can be implemented by those skilled in the art using their basic programming skills after reading the description of the present invention.

Thus, the objects of the invention may also be achieved by running a program or a set of programs on any computing device. The computing device may be a general purpose device as is well known. The object of the invention is thus also achieved solely by providing a program product comprising program code for implementing the method or the apparatus. That is, such a program product also constitutes the present invention, and a storage medium storing such a program product also constitutes the present invention. It is to be understood that the storage medium may be any known storage medium or any storage medium developed in the future. It is further noted that in the apparatus and method of the present invention, it is apparent that each component or step can be decomposed and/or recombined. These decompositions and/or recombinations are to be regarded as equivalents of the present invention. Also, the steps of executing the series of processes described above may naturally be executed chronologically in the order described, but need not necessarily be executed chronologically. Some steps may be performed in parallel or independently of each other.

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

1. A method for determining resource occupation status is applied to a third node, and includes:

determining the occupation state of resources for transmitting the data packet to be transmitted according to the transmission state information;

wherein the transmission status information comprises at least one of:

control channel information carried on a control channel of the first node, the control channel information including at least one of: HARQ process information, new data indication NDI, redundancy version RV;

a physical layer measurement result, which is obtained by measuring a physical layer corresponding to the current retransmission at the retransmission time of the data packet to be transmitted;

the first node and the second node in the unicast or multicast mode are a receiving-transmitting node pair, and the third node is not a receiving end of the first node.

2. The method of claim 1, wherein if the transmission status information does not include the feedback information but at least includes the control channel information, determining an occupation status of a resource used for transmitting the data packet to be transmitted according to the transmission status information comprises:

3. The method according to claim 1, wherein when the transmission status information does not include the feedback information and the control channel information, determining an occupation status of a resource used for transmitting the data packet to be transmitted according to the transmission status information includes:

4. The method for determining the resource occupation state according to claim 1, wherein when the transmission state information at least includes the feedback information, determining the occupation state of the resource used for transmitting the data packet to be transmitted according to the transmission state information includes:

5. The method for determining the resource occupation state according to claim 2, wherein determining the occupation state of the resource used for transmitting the data packet to be transmitted according to the control channel information comprises:

6. The method for determining the resource occupation state according to claim 5, wherein determining the occupation state of the resource used for transmitting the data packet to be transmitted according to the HARQ process information in the control channel information comprises:

if the first process is the same as the second process, determining an occupation state of resources for transmitting the original service data packet according to a New Data Indication (NDI) in the control channel information;

7. The method of claim 6, wherein the determining the occupation status of the resource used for transmitting the original service data packet according to the new data indicator NDI in the control channel information comprises:

8. The method for determining the resource occupation state according to claim 6, wherein determining the resource occupation state for transmitting the original service data packet according to the first resource of the multiple retransmissions of the original service data packet and the second resource of the multiple retransmissions of the newly added service data packet comprises:

9. The method according to claim 3, wherein the physical layer measurement result is obtained by measuring a physical layer corresponding to the current retransmission at the retransmission time of the data packet to be transmitted;

10. The method for determining the resource occupation state according to claim 9, wherein determining the occupation state of the resource used for transmitting the data packet to be transmitted according to the physical layer measurement result comprises:

11. An apparatus for determining resource occupation status, applied to a third node, includes:

a first processing module, configured to determine, according to the transmission state information, an occupation state of a resource used for transmitting the data packet to be transmitted;

wherein the transmission status information comprises at least one of:

12. A terminal, the terminal being a third node, comprising: a transceiver, a processor, a memory, and a program stored on the memory and executable by the processor, wherein the processor, when executing the program, implements:

acquiring the occupation state of resources for transmitting the data packet to be transmitted according to the transmission state information; wherein the transmission status information comprises at least one of:

13. A computer-readable storage medium, characterized in that a computer program is stored on the computer-readable storage medium, which computer program, when being executed by a processor, carries out the steps of the method for determining a resource occupancy state according to any one of claims 1 to 10.