CN110740522A

CN110740522A - resource selection method, base station and terminal

Info

Publication number: CN110740522A
Application number: CN201810792901.7A
Authority: CN
Inventors: 冯媛; 房家奕; 赵锐
Original assignee: Telecommunications Science and Technology Research Institute Co Ltd
Current assignee: Datang Mobile Communications Equipment Co Ltd
Priority date: 2018-07-18
Filing date: 2018-07-18
Publication date: 2020-01-31
Anticipated expiration: 2038-07-18
Also published as: CN110740522B; WO2020015527A1

Abstract

The invention provides resource selection methods, a base station and a terminal, which solve the problem that a malicious terminal can track the geographic position of a target terminal by continuously monitoring information on a determined resource under an SPS mechanism mode, so that the privacy of the target terminal is leaked.

Description

resource selection method, base station and terminal

Technical Field

The present invention relates to the field of communications technologies, and in particular, to resource selection methods, a base station, and a terminal.

Background

In a Semi-Persistent Scheduling (SPS) mechanism, a malicious terminal may continuously monitor information on a certain resource and track a geographic location of a target terminal, that is, privacy disclosure risks in V2X communication.

Disclosure of Invention

The invention aims to provide resource selection methods, a base station and a terminal, which are used for solving the problem that a malicious terminal can track the geographic position of a target terminal through continuously determining information monitoring on resources in an SPS mechanism mode, so that the privacy of the target terminal is leaked.

In order to achieve the above object, the present invention provides resource selection methods applied to a base station, including:

and triggering the SPS resource reselection when the ID of the layer two changes or the duration of the semi-persistent scheduling SPS resource reaches the preset maximum duration.

When the layer two ID changes, the SPS resource reselection is triggered, and the method comprises the following steps:

acquiring th timer maintenance information sent by a terminal;

maintaining second timers synchronized with said th timer according to the th timer maintenance information;

determining that the second layer ID changes and triggering SPS resource reselection under the condition that the second timer is overtime;

wherein the th timer maintenance information includes a period of the th timer and an offset value indicating a time difference between the current time and the th timer.

Wherein triggering SPS resource reselection comprises:

and if the base station currently allocates the SPS resources for the terminal, indicating the terminal to release the currently allocated SPS resources through downlink control information DCI, and reallocating the SPS resources for the terminal.

Wherein, when the duration of the semi-persistent scheduling SPS resource reaches the preset maximum duration, triggering the SPS resource reselection, including:

maintain third timers for every SPS processes;

and under the condition that the third timer is overtime, determining that the duration of the SPS resources reaches the preset maximum duration, and reallocating the SPS resources for the service corresponding to the overtime third timer.

In order to achieve the above object, an embodiment of the present invention further provides resource selection methods, which are applied to a terminal, and include:

and triggering SPS resource reselection when the layer two ID is changed.

the bottom protocol layer of the terminal maintains the th timer according to the maintenance information of the th timer, and triggers SPS resource reselection when the th timer is overtime and the second ID is determined to be changed;

or, when the bottom layer protocol layer of the terminal receives the layer two ID change indication sent by the high layer protocol layer, the SPS resource reselection is triggered;

Wherein triggering SPS resource reselection comprises:

if the service packet exists in the cache, triggering SPS resource reselection immediately;

if the service packet does not exist in the cache, triggering SPS resource reselection when the high-level service transmission block reaches the cache.

if th target data exist in the cache, the th target data are sent by using a source layer two ID, and SPS resource reselection is triggered when service packets which are not transmitted exist in the cache, and the changed layer two ID is used;

the th target data includes retransmission resources of a service packet, and initial transmission resources of the service packet have been transmitted or include th segment data of a protocol data unit, PDU, and second segment data of the PDU has been transmitted.

after the second layer ID is changed, if the SPS resource indication information indicates that the current SPS resource continues to be transmitted at the subsequent time, after the current SPS resource is transmitted, triggering the SPS resource reselection, and using the changed second layer ID;

or after the second layer ID is changed, if the SPS resource indication information indicates that the current SPS resource continues to be sent at the subsequent time, triggering the SPS resource reselection after the second target data is sent by using the source layer second ID, and using the changed second layer ID, wherein the second target data indicates that the current SPS resource does not continue to be sent at the subsequent time;

or before the second layer ID changes, third target data is sent by using the source ID, the current SPS resource is indicated not to be continuously sent at the subsequent time by scheduling control information SCI, and the SPS resource reselection is triggered and the changed second layer ID is used when the th timer is overtime, wherein the third target data is the last service packets sent before the th timer is overtime.

In order to achieve the above object, an embodiment of the present invention further provides base stations, which include a transceiver, a memory, a processor, and a program stored in the memory and executable on the processor, where the processor executes the program to implement the following steps:

Wherein the processor, when executing the program, further implements the steps of:

acquiring th timer maintenance information sent by a terminal;

maintain third timers for every SPS processes;

To achieve the above object, the present invention further provides computer readable storage media, on which a computer program is stored, the computer program implementing the steps of the resource selection method as described above when executed by a processor.

In order to achieve the above object, an embodiment of the present invention further provides terminals, including a transceiver, a memory, a processor, and a program stored in the memory and executable on the processor, where the processor executes the program to implement the following steps:

and triggering SPS resource reselection when the layer two ID is changed.

a bottom layer protocol layer of the terminal receives the maintenance information of an th timer sent by a high layer protocol layer;

the bottom layer protocol layer of the terminal maintains the timer according to the maintenance information of the timer, and triggers SPS resource reselection when determining that the ID of the second layer is changed when the timer is overtime;

In order to achieve the above object, an embodiment of the present invention further provides base stations, including:

and the th triggering module is configured to trigger SPS resource reselection when the layer two ID changes or the duration of the SPS resources in the semi-persistent scheduling reaches a preset maximum duration.

Wherein the th trigger module comprises:

the acquisition submodule is used for acquiring the maintenance information of the th timer sent by the terminal;

an maintenance submodule for maintaining second timers synchronized with the timer based on the timer maintenance information;

the triggering submodule is used for determining that the second layer ID changes and triggering SPS resource reselection under the condition that the second timer is overtime;

Wherein the th trigger module comprises:

a second trigger module to maintain third timers for every SPS processes;

and the allocation submodule is used for determining that the duration of the SPS resources reaches the preset maximum duration under the condition that the third timer is overtime, and reallocating the SPS resources for the service corresponding to the overtime third timer.

In order to achieve the above object, an embodiment of the present invention further provides terminals, including:

and the second triggering module is used for triggering the SPS resource reselection when the second layer ID is changed.

The second triggering module is used for receiving the maintenance information of th timer sent by a higher layer protocol layer through a bottom layer protocol layer of the terminal, maintaining the th timer according to the maintenance information of the th timer, and triggering SPS resource reselection when the th timer is overtime and the second layer ID is determined to be changed;

or, when receiving a layer two ID change indication sent by a higher layer protocol layer, triggering SPS resource reselection;

The embodiment of the invention has the following beneficial effects:

according to the technical scheme of the embodiment of the invention, when the second-layer ID changes or the duration of the semi-persistent scheduling SPS resource reaches the preset maximum duration, the SPS resource reselection is triggered, the SPS resource is prevented from remaining unchanged for a long time, the receiving node is prevented from associating different second-layer IDs, and the probability of continuous tracking of the malicious terminal on the target terminal is reduced.

Drawings

FIG. 1 is a schematic representation of a media access control header;

FIG. 2 is a second schematic diagram of a media access control head;

FIG. 3 is a diagram illustrating an SRC and an SPS during a trajectory tracking process;

FIG. 4 is a flowchart illustrating a resource selection method according to an embodiment of the present invention;

FIG. 5 is a second flowchart illustrating a resource selection method according to an embodiment of the present invention;

fig. 6 is a block diagram of a base station according to an embodiment of the present invention;

fig. 7 is a block diagram of a base station according to an embodiment of the present invention;

fig. 8 is a block diagram of a terminal according to an embodiment of the present invention;

fig. 9 is a block diagram 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.

In order that those skilled in the art will be better able to understand the embodiments of the present invention, the following explanation is first made.

PC5mode 3 has Dynamic Scheduling (DS) and Semi-Persistent Scheduling (SPS), mode 4V2V has SPS based on listening to sending and one shot times sending.

For mode4 sending SPS resource duration, the standard defines the following triggering conditions for 6 resource reselections:

(1) when the SPS timer (counter) is overtime, resource reselection is required;

when the service transport block TB arrives, if counter is 0:

when the counter is 1, the value of the medium access control MAC entity which is randomly selected between [0 and 1] with equal probability is larger than the probability p of resource maintenance, and resource reselection is required;

when counter is 1, the value of the MAC entity which is randomly selected between [0 and 1] with equal probability is less than or equal to the probability p of resource maintenance, and the resource should be kept occupied;

the carrier specific parameter p ranges from [0, 0.2, 0.4, 0.6, 0.8 ];

resetting the counter value: if the period of the resource selection UE for sending the service is greater than or equal to 100ms, the value is an integer uniformly and randomly selected between [5 and 15 ]; if the period of the resource selection UE for sending the service is 50ms, the value is an integer uniformly and randomly selected between [10 and 30 ]; if the period of the resource selection UE for sending the service is 20ms, the value is an integer uniformly and randomly selected between [25 and 75 ];

when the service TB arrives, if the counter is not 0:

counter minus 1;

(2) if the UE does not perform service transmission or retransmission on all the transmission opportunities reserved with resources in the continuous 1s, performing resource reselection;

(3) if the UE continuously skips N times of transmission opportunities of reserved resources, the resources are reselected, wherein N is high-level configuration and the value range is [1, 2, 3, 4, 5, 6, 7, 8, 9 ];

(4) if no reserved resource exists currently or the resource allocated by the maximum allowed modulation and coding strategy MCS currently cannot meet the transmission of the TB and the MAC does not segment the service data unit (RLC SDU) of the radio link control protocol layer and needs to reselect the resource;

(5) the reserved resources cannot meet the time delay requirement of data transmission, and the MAC entity selects not to execute one shot transmission, and should release the resources and reselect;

(6) if the RRC configuration resource pool is changed, the MAC layer triggers the UE related to the resources in the changed resource pool to initiate resource reselection.

The longest duration of the SPS resource is related to the SPS period, the counter value, the resource keeping probability P and the like. Taking the service period SPS period 1s as an example, the resource SPS may last 15s, and the maximum duration of the resource SPS cannot be determined if the resource reselection probability P is considered.

For the duration of PC5mode 3 Sildelink SPS resource, UE service statistics determines that the service is periodic service, and the UE reports a Sidelink transmission type information List (traffic Pattern Info List SL) through a terminal auxiliary information (UE assignment information) message, namely reports the service size, service period, priority, starting position of service start and the like corresponding to the SPS resource to be applied, after receiving the information, the eNB allocates SPS resource or DCI resource to the service group reported in the UE assignment information through Downlink Control Information (DCIs) according to the occupation condition of the currently maintained resource pool and other factors.

If the service statistical rule changes (for example, a new service, a service period changes, the delay of the service size of the existing scheduling assignment grant does not meet the requirement, the service ends, and the like), the UE reports all terminal auxiliary information (full UE assignment information), where multiple transmission traffic characteristics may be reported to cover the previous UE assignment information, and the eNB deactivates and/or activates the new SPS grant to the original SPS process resource assignment (SPS process grant) through or multiple pieces of DCI according to the UE assignment information.

If the service is not changed, that is, the terminal does not report the information that the service change requires resource change through the UE association information, and the eNB does not actively cancel the SPS resource due to resource unlimited or congestion, and the influence of the divided geographic area zoning is not considered, it can be considered that the UE can continuously occupy the corresponding SPS resource.

Next, SRC is explained as follows.

As shown in fig. 1 and fig. 2, SRC information is carried in a medium access control header (MAC header), and a receiving terminal distinguishes different sending users through SRC. SRC: source Layer two ID (source Layer-2ID), UE self-assigns from the generated ProSe-based UE ID, T5000 timer changes its value when it times out, T5000 timer can be configured, default to 300s, this value configuration should be small from the perspective of preventing tracking.

Currently for mode4, the MAC maintains the source layer two ID information times, and when the higher layer primitive indicates the source ID information, the MAC internally determines whether the source ID has changed.

If the MAC source ID is judged to be changed, resource retransmission is triggered; and if the MAC source ID is judged not to be changed, processing according to the existing protocol flow. That is, when the MAC source ID changes, the guaranteed resources also change.

And if the service TB exists in the cache at the moment, immediately triggering the resource reselection. If no service TB exists in the cache at this time, the information is recorded, and when the high-layer service TB arrives, the resource reselection is triggered immediately.

When the track tracking is carried out by the malicious terminal, the tracking judgment is tried to be carried out according to the SRC and the bottom layer resources ( vehicles are possible if any SRC and bottom layer resources are kept unchanged) (V2X application messages carry geographical position information, and the positions of the vehicles cannot jump), wherein the change of the SRC mainly depends on a T5000 timer, whether the SPS resources are continuously analyzed or not is subjected to the above analysis, the two independent processes are carried out, namely, in the conversion point of the change of the SRC, there is any possibility that Case1, the SPS resources are also changed, namely the resources are reselected, Case2, the SPS resources are continuously, and the probability of occurrence of Case2 is related to the duration time of the SPS resources, but is not in absolute direct proportion.

As shown in fig. 3, in the time period when SRC1 changes to SRC2, SPS resources continue, and the tracking UE may consider that SRC1 and SRC2 correspond to UEs, and may continuously track the UE.

In addition, from the perspective of combining the SPS resources and the MAC ID, the malicious terminal has constant probability to continuously track the vehicle, the tracking time is not controllable, and the problem of avoiding long-time tracking between vehicles is problems to be solved no matter the PC5mode 3SPS or the mode4 SPS.

Based on this, as shown in fig. 4, an embodiment of the present invention provides resource selection methods, which are applied to a base station, and include:

step 401: and triggering the SPS resource reselection when the ID of the layer two changes or the duration of the semi-persistent scheduling SPS resource reaches the preset maximum duration.

The layer two ID refers to the above SRC.

Specifically, for mode3 or mode4, SPS resource reselection is triggered when the layer two ID changes; for mode3, SPS resource reselection is triggered when the duration of semi-persistent scheduling SPS resources reaches a preset maximum duration.

According to the resource selection method provided by the embodiment of the invention, when the second-layer ID changes or the duration of the semi-persistent scheduling SPS resource reaches the preset maximum duration, the SPS resource reselection is triggered, the SPS resource is prevented from remaining unchanged for a long time, the receiving node is prevented from associating different second-layer IDs, and the probability of continuous tracking of the malicious terminal on the target terminal is reduced.

Further , when the layer two ID changes, triggering SPS resource reselection includes:

acquiring th timer maintenance information sent by a terminal;

When the terminal and the base station establish connection, the terminal informs the base station of the maintenance information of the T5000 timer through signaling, so that the base station maintains synchronized timers according to the maintenance information.

For example, the terminal reports offset values indicating the time difference between the current time and the T5000 timer and period Information indicating the period of the T5000 timer inside the UE, such as 5s, through Sidelink UE Information (Sidelink UE Information).

As optional implementations, the triggering SPS resource reselection includes:

The eNB can keep synchronization with the UE inner layer II ID according to the offset and period values; that is, although the change of the specific value of the layer two ID is not known, the time point of the change is synchronous maintenance. When the timer maintained by the eNB is overtime and if the current eNB allocates SPS resources for the UE, the eNB releases the current resources through the DCI and reallocates the SPS resources.

In addition, the terminal may also add corresponding information when ul auxiliary information (SPS) applies for SPS resources, so as to report offset and period information.

, when the duration of the SPS resources reaches a preset maximum duration, triggering SPS resource reselection, including:

maintain third timers for every SPS processes;

Specifically, after the terminal and the base station establish connection, the base station maintains corresponding SPS resource duration longest time timers (third timers) for every SPS processes (processes), and when the third timer is over, resources are newly allocated to the UE.

After the UE reports UE association information and the eNB allocates resources to the UE, the eNB maintains a corresponding timer for every SPSprocesses, the timer is started in effect from the grant (initial transmission) subframe of the allocated SPS resources, the timer is expired after any conditions trigger resource reselection, and if the timer is activated on persistent resources, the timer is incremented along with time and directly times out.

And after the timer is overtime, the eNB reallocates resources for the corresponding service, and deactivates and/or activates the original SPS process grant through or more DCIs.

As shown in fig. 5, an embodiment of the present invention further provides resource selection methods, which are applied to a terminal, and include:

step 501: and triggering SPS resource reselection when the layer two ID is changed.

Specifically, SPS resource reselection is triggered when the layer two ID changes for mode 4.

According to the resource selection method provided by the embodiment of the invention, the SPS resource reselection is triggered when the second layer ID is changed, so that the SPS resource is prevented from being kept unchanged for a long time, the receiving node is prevented from associating different second layer IDs, and the probability of continuous tracking of a malicious terminal on a target terminal is reduced.

Further , as an alternative implementation, when the layer two ID changes, SPS resource reselection is triggered, including:

Further , the triggering SPS resource reselection includes:

Here, for the mode4, when the terminal higher layer protocol layer (the adaptation layer above the packet data convergence protocol PDCP) determines that the layer two ID changes, it sends a layer two ID change indication to the lower layer protocol layer to indicate that the layer two ID changes, and the lower layer protocol layer triggers SPS resource reselection according to the layer two ID change indication.

Or, the terminal higher layer protocol layer indicates, to the lower layer protocol layer, the maintenance information of the T500 timer, where the maintenance information is the same as the maintenance information described in the foregoing embodiment, and for avoiding redundancy, it is not described here again, and the lower layer protocol layer (MAC) notifies and maintains the timer according to the maintenance information, and when the timer times out, and it is determined that the layer two ID changes, the SPS resource reselection is triggered.

Specifically, if a service packet exists in the cache, the SPS resource reselection is triggered immediately; if the service packet does not exist in the cache, triggering SPS resource reselection when the high-level service transmission block reaches the cache.

As a second optional implementation manner, the triggering SPS resource reselection includes:

It should be noted that, the PDU may specifically include a plurality of pieces of data, and the second piece of data is transmitted before the th piece of data.

The source layer two ID in the embodiment of the present invention refers to the layer two ID before the change.

Specifically, when the th target data is retransmission resources of a service packet and initial transmission resources of the service packet are already transmitted, for service packet TBs of UEs, it is assumed that the number of HARQ retransmissions is 1 at time t1, after the initial transmission is performed, at time t2, UE mode 4/3MAC maintenance or mode4 indicates that a higher MAC ID (layer two ID) is changed from MAC ID1 to MAC ID2, and the initial transmission of the TB is already transmitted, the retransmission resources are at time t3, and t1< t2< t3, and for additional TBs, it is assumed that the selected resources are t4, t5, and t2< t4< t 5.

For the th TB, because the initial transmission at time t1 has been transmitted, for the receiver HARQ combining, time t2 does not trigger resource reselection, i.e., whether to retransmit resource or use MAC ID1 before already selected resource for the 2 nd TB, because the initial transmission at time t4 has not been transmitted yet, time t2 triggers resource reselection, including initial transmission resource and retransmission resource, and uses new MAC ID, i.e., MAC ID 2.

When the -th target data is -th segment data of a Protocol Data Unit (PDU) and the second segment data of the PDU is transmitted, for radio link layer control protocol (RLC) PDUs of UEs, it is assumed that a service arrival selection resource RLC at time t1 determines segments F1 and F2, segment F1 is transmitted at the earliest at time t2, UE mode 4/3MAC maintenance or mode4 higher layer indicates that the MAC ID is changed and is changed from MAC ID1 to MAC ID2 at time t3, segment F2 is transmitted at the earliest at time t4, and t1< t2< t3< t 4.

For receiver concatenation, time t2 does not trigger resource reselection to the existing unsent segment F2 resource, i.e., for segment F2, or using the MAC id1 before the already selected resource.

As a third optional implementation manner, the triggering SPS resource reselection includes:

specifically, for the mode4, when the MAC ID changes at time t1, the MAC ID is changed from MAC ID1 to MAC ID2, and when resource reselection is triggered, it is assumed that the UE1, if the previous SPS resource indication information indicates that the current resource continues to be reserved (continues to be transmitted at the subsequent time), in order to reduce the influence on the monitoring sending of another node, sends service packets after the change of the layer two ID, which indicates that the current SPS resource does not reserve any more.

Or before the layer two ID is changed, the source ID is used for sending third target data, the current SPS resource is indicated not to be sent continuously at the subsequent time through scheduling control information SCI, the SPS resource reselection is triggered when the th timer is overtime, and the changed layer two ID is used, wherein the third target data is the last service packets sent before the th timer is overtime.

The current time t2< t1, and t2+ resource reservation period (SPS period) > t1, that is, the current service is the last SPS TB packets before the MAC id change, and the current COUNTER is greater than 1, this time can change the resource reservation field in the SCI to 0, that is, increase prediction parts.

As shown in fig. 6, the embodiment of the present invention further provides kinds of base stations, which includes a memory 620, a processor 600, a transceiver 610, a bus interface, and a computer program stored on the memory 620 and operable on the processor 600, wherein the processor 600 is configured to read the program in the memory 620 and execute the following processes:

In fig. 6, among other things, the bus architecture may include any number of interconnected buses and bridges, specifically, the various circuits represented by the or processors represented by the processor 600 and the memory represented by the memory 620 are linked at the bus architecture may also link various other circuits such as peripherals, voltage regulators, power management circuits, etc., at , all of which are well known in the art and therefore not described further herein .

Optionally, the processor 600 may further implement the following steps when executing the computer program:

acquiring th timer maintenance information sent by a terminal;

maintain third timers for every SPS processes;

In embodiments of the present invention, there is also provided computer readable storage media having stored thereon a computer program that when executed by a processor performs the steps of:

When executed by the processor, the program can implement all the implementation manners in the method embodiment applied to the base side, and is not described herein again to avoid repetition.

As shown in fig. 7, an embodiment of the present invention further provides base stations, including:

an th triggering module 701, configured to trigger SPS resource reselection when the layer two ID changes or the duration of the SPS resources in the semi-persistent scheduling reaches a preset maximum duration.

In the base station of the embodiment of the present invention, the th trigger module includes:

In the base station of the embodiment of the present invention, the trigger submodule is configured to instruct, if the base station currently allocates SPS resources to the terminal, the terminal to release the currently allocated SPS resources through downlink control information DCI, and reallocate the SPS resources to the terminal.

a second trigger module to maintain third timers for every SPS processes;

According to the base station provided by the embodiment of the invention, when the second-layer ID changes or the duration of the semi-persistent scheduling SPS resource reaches the preset maximum duration, the SPS resource reselection is triggered, the SPS resource is prevented from remaining unchanged for a long time, the receiving node is prevented from associating different second-layer IDs, and the probability of continuous tracking of a malicious terminal on the target terminal is reduced.

As shown in fig. 8, an embodiment of the present invention further provides terminals, including a transceiver, a memory, a processor, and a computer program stored on the memory and executable on the processor, the processor implementing the following steps when executing the computer program:

and triggering SPS resource reselection when the layer two ID is changed.

In fig. 8, among other things, the bus architecture may include any number of interconnected buses and bridges, specifically, the various circuits represented by the or processors represented by the processor 800 and the memory represented by the memory 820 are linked up at the bus architecture may also link up various other circuits such as peripherals, voltage regulators, power management circuits, etc., at , all of which are well known in the art and therefore not described further herein .

The processor 800 is responsible for managing the bus architecture and general processing, and the memory 820 may store data used by the processor 800 in performing operations.

Optionally, the processor 800 is further configured to read the program in the memory 820, and perform the following steps:

and triggering SPS resource reselection when the layer two ID is changed.

When executed by the processor, the program can implement all the implementation manners in the above-described embodiment of the resource selection method applied to the terminal side, and details are not described here again to avoid repetition.

As shown in fig. 9, the embodiment of the present invention further provides terminals, including:

a second triggering module 901, configured to trigger SPS resource reselection when the layer two ID changes.

According to the terminal of the embodiment of the invention, the second triggering module is used for receiving the maintenance information of the th timer sent by the high-level protocol layer through the bottom-level protocol layer of the terminal, maintaining the th timer according to the maintenance information of the th timer, and triggering SPS resource reselection when the th timer is overtime and the second ID of the layer is determined to be changed;

In the terminal of the embodiment of the present invention, the second triggering module is configured to immediately trigger SPS resource reselection if a service packet exists in the cache; if the service packet does not exist in the cache, triggering SPS resource reselection when the high-level service transmission block reaches the cache.

In the terminal of the embodiment of the present invention, the second triggering module is configured to send the th target data by using the source layer two ID if the th target data exists in the cache, and trigger SPS resource reselection and use the changed layer two ID when an untransmitted service packet exists in the cache;

In the terminal of the embodiment of the present invention, the second triggering module is configured to, after the second layer ID changes, trigger SPS resource reselection after the current SPS resource transmission is completed and use the changed second layer ID if the SPS resource indication information indicates that the current SPS resource continues to be transmitted at a subsequent time;

or after the layer two ID is changed, if the SPS resource indication information indicates that the current SPS resource continues to be sent at the subsequent time, triggering the SPS resource reselection after the source layer two ID is used for sending second target data, and using the changed layer two ID, wherein the second target data indicates that the current SPS resource does not continue to be sent at the subsequent time;

or, the method is used for sending third target data by using the source ID before the change of the layer two ID, indicating that the current SPS resource is not sent continuously at the subsequent time through the scheduling control information SCI, triggering the SPS resource reselection when the th timer is overtime, and using the changed layer two ID, wherein the third target data is the last service packets sent before the th timer is overtime.

According to the terminal provided by the embodiment of the invention, the SPS resource reselection is triggered when the second layer ID is changed, so that the SPS resource is prevented from being kept unchanged for a long time, the receiving node is prevented from associating different second layer IDs, and the probability of continuous tracking of a malicious terminal on the target terminal is reduced.

In various embodiments of the present invention, it should be understood that the sequence numbers of the above-mentioned 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 on the implementation process of the embodiments of the present invention.

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, resource selection method, applied to a base station, comprising:

2. The method of claim 1, wherein triggering SPS resource reselection when a change occurs in a layer two ID comprises:

acquiring th timer maintenance information sent by a terminal;

3. The method of claim 2, wherein triggering SPS resource reselection comprises:

4. The method of claim 1, wherein triggering SPS resource reselection when the duration of the SPS resources reaches a preset maximum duration comprises:

maintain third timers for every SPS processes;

5, resource selection method, applied to a terminal, comprising:

and triggering SPS resource reselection when the layer two ID is changed.

6. The method of claim 5, wherein triggering SPS resource reselection when a change occurs in a layer two ID comprises:

7. The method of claim 6, wherein triggering SPS resource reselection comprises:

8. The method of claim 5, wherein triggering SPS resource reselection when a change occurs in a layer two ID comprises:

9. The method of claim 5, wherein triggering SPS resource reselection when a change occurs in a layer two ID comprises:

10, A base station comprising a transceiver, a memory, a processor and a program stored on the memory and executable on the processor, wherein the processor when executing the program performs the steps of:

11. The base station of claim 10, wherein the processor when executing the program further performs the steps of:

acquiring th timer maintenance information sent by a terminal;

12. The base station of claim 11, wherein the processor when executing the program further performs the steps of:

13. The base station of claim 10, wherein the processor when executing the program further performs the steps of:

maintain third timers for every SPS processes;

14, computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, carries out the steps of the resource selection method according to any of claims 1 to 4, wherein specifies the steps of the method.

15, terminal comprising a transceiver, a memory, a processor and a program stored on the memory and executable on the processor, wherein the processor when executing the program performs the steps of:

and triggering SPS resource reselection when the layer two ID is changed.

16. The terminal of claim 15, wherein the processor, when executing the program, further performs the steps of:

17. The terminal of claim 16, wherein the processor, when executing the program, further performs the steps of:

18. The terminal of claim 15, wherein the processor, when executing the program, further performs the steps of:

19. The terminal of claim 15, wherein the processor, when executing the program, further performs the steps of:

Computer-readable storage medium, 20, , on which a computer program is stored, which, when being executed by a processor, carries out the steps of the resource selection method according to any of claims 5 to 9, .

21, , a base station, comprising:

22. The base station of claim 21, wherein the th trigger module comprises:

23. The base station of claim 21, wherein the th trigger module comprises:

a second trigger module to maintain third timers for every SPS processes;

A terminal of the type 24, , comprising:

25. The terminal of claim 24, wherein the second triggering module is configured to receive, through a lower protocol layer of the terminal, maintenance information of a th timer sent by a higher protocol layer, maintain the th timer according to the maintenance information of the th timer, and trigger SPS resource reselection when it is determined that a layer two ID changes when the th timer expires;