CN114640422B - Resource reselection control method, device and terminal - Google Patents
Resource reselection control method, device and terminal Download PDFInfo
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- CN114640422B CN114640422B CN202011488841.3A CN202011488841A CN114640422B CN 114640422 B CN114640422 B CN 114640422B CN 202011488841 A CN202011488841 A CN 202011488841A CN 114640422 B CN114640422 B CN 114640422B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
- H04L1/0023—Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the signalling
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
- H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
- H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
- H04L1/1806—Go-back-N protocols
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
- H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
- H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
- H04L1/1812—Hybrid protocols; Hybrid automatic repeat request [HARQ]
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
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Abstract
The application provides a resource reselection control method, a device and a terminal, and relates to the technical field of communication. The resource reselection control method is executed by a terminal and comprises the following steps: for the periodically reserved transmission resources, performing reselection control on the pre-transmission resources in the mth period, so that the pre-transmission resources in the mth period meet a first condition; wherein the first condition includes at least one of: the first requirement of the hybrid automatic repeat request round-trip delay (HARQ RTT) is met between two adjacent front and rear resources; the second requirement of the maximum window length indicated by the direct communication link control information SCI is fulfilled between two adjacent resources. The application improves the communication reliability and ensures the system performance.
Description
Technical Field
The present application relates to the field of communications technologies, and in particular, to a method, an apparatus, and a terminal for controlling resource reselection.
Background
In the process of implementing the present application, the inventor finds that at least the following problems exist in the prior art:
for periodic traffic transmission, after the resource reselection occurs in the previous period, there is a possibility that the round Trip delay (Hybrid Automatic Repeat Request Round-Trip Time, HARQ RTT) of the hybrid automatic repeat request (HARQ) is not satisfied between the pre-transmission resources in the next period (or the next resource cannot be indicated by the direct communication link control information (Sidelink Control Information, SCI, may also be referred to as side link control information) carried by the previous resource), thereby affecting the system performance.
Disclosure of Invention
The embodiment of the application provides a resource reselection control method, a device and a terminal, which are used for solving the problems that for the transmission of periodic service, the resource reselection occurs in the previous period, so that HARQ RTT is not satisfied between pre-transmitted resources in the next period or the next resource cannot be indicated by SCI carried by the previous resource, and the system performance is affected.
In order to solve the above technical problem, an embodiment of the present application provides a resource reselection control method, which is executed by a terminal, including:
for the periodically reserved transmission resources, performing reselection control on the pre-transmission resources in the mth period, so that the pre-transmission resources in the mth period meet a first condition;
wherein the first condition includes at least one of:
the first requirement of the hybrid automatic repeat request round-trip delay (HARQ RTT) is met between two adjacent front and rear resources;
the second requirement of the maximum window length indicated by the direct communication link control information SCI is fulfilled between two adjacent resources.
Optionally, the performing reselection control on the pre-sent resource in the mth period includes:
and if the pre-sending resources in the mth period do not meet the first condition, carrying out resource reselection on the pre-sending resources in the mth period.
Optionally, if the pre-sending resource in the mth period does not meet the first condition, the performing resource reselection on the pre-sending resource in the mth period includes:
judging whether each pre-transmission resource in the pre-transmission resource set in the mth period meets a first condition;
when at least one pre-sent resource does not meet the first condition, triggering to reselect the pre-sent resource in the mth period, and generating a new resource set;
wherein the resources in the new set of resources satisfy the first condition;
the first condition includes a first requirement and a second requirement when the HARQ of the data packet is enabled;
the first condition includes a second requirement when HARQ of the data packet is not enabled.
Optionally, the triggering performs resource reselection on the pre-sent resource in the mth period, and generates a new resource set, including:
triggering reselection of all pre-sent resources in the pre-sent resource set in the mth period to generate a new resource set; or alternatively
Triggering to reselect preset resources in the preset resource set to generate a new resource set;
wherein, the preset resources are: the resource in the pre-sending resource set when the mth period data packet arrives is different from the resource in the pre-sending resource set when the mth-1 period data packet arrives.
Optionally, the first requirement includes:
the absolute value of the time difference between the third resource and the first resource is larger than or equal to a first preset value;
the absolute value of the time difference between the third resource and the second resource is larger than or equal to a first preset value;
the third resource, the first resource and the second resource are three adjacent resources, the time sequence of the first resource is positioned before the third resource, and the time sequence of the second resource is positioned after the third resource;
the first preset value is determined by HARQ RTT.
Optionally, the second requirement includes:
the absolute value of the time difference between the third resource and the first resource is smaller than or equal to a second preset value;
the absolute value of the time difference between the third resource and the second resource is smaller than or equal to a second preset value;
the third resource, the first resource and the second resource are three adjacent resources, the time sequence of the first resource is positioned before the third resource, and the time sequence of the second resource is positioned after the third resource;
the second preset value is determined by the maximum window length indicated by SCI.
The embodiment of the application also provides a terminal, which comprises: the resource reselection control method comprises a processor, a memory and a computer program stored in the memory and capable of running on the processor, wherein the computer program realizes the steps of the resource reselection control method when being executed by the processor.
The embodiment of the application also provides a resource reselection control device which is applied to the terminal and comprises the following steps:
the control module is used for carrying out reselection control on the pre-sent resources in the mth period for the periodically reserved sent resources so that the pre-sent resources in the mth period meet a first condition;
wherein the first condition includes at least one of:
the first requirement of the hybrid automatic repeat request round-trip delay (HARQ RTT) is met between two adjacent front and rear resources;
the second requirement of the maximum window length indicated by the direct communication link control information SCI is fulfilled between two adjacent resources.
The embodiment of the application also provides a readable storage medium, wherein the readable storage medium stores a computer program, and the computer program realizes the steps of the resource reselection control method when being executed by a processor.
The beneficial effects of the application are as follows:
according to the scheme, the pre-sending resources in the mth period are subjected to reselection control to ensure that the pre-sending resources in the mth period meet the first condition, so that the problem that the HARQ RTT is not met between the pre-sending resources in the subsequent period or the SCI indication that the subsequent resources cannot be carried by the previous resources is caused by resource reselection in the previous period when the periodic service is sent is solved, and the system performance is influenced.
Drawings
FIG. 1 shows a schematic diagram of the time relationship between a sending window and a resource selection window;
FIG. 2 is a diagram of a re-evaluation mechanism;
FIG. 3 shows a schematic diagram of a preemption mechanism;
FIG. 4 is a diagram illustrating the use of the originally selected resource for the kth cycle as the pre-transmit resource for the kth+1 cycle;
FIG. 5 is a schematic diagram showing the actual transmission resource after the reselection of the kth period as the pre-transmission resource of the kth+1th period;
fig. 6 is a diagram showing that HARQ RTT is not satisfied between pre-transmission resources of the k+1th period;
FIG. 7 is a diagram illustrating an SCI indication that a subsequent resource cannot be carried by a previous resource;
FIG. 8 is a flow chart of a resource reselection control method according to an embodiment of the present application;
FIG. 9 shows one of schematic diagrams of the time slot relationship of the resources before and after reselection;
FIG. 10 is a second diagram showing a time slot relationship between the resources before and after reselection;
FIG. 11 shows a schematic block diagram of an apparatus according to an embodiment of the application;
fig. 12 shows a structure of a terminal according to an embodiment of the present application.
Detailed Description
The present application will be described in detail below with reference to the drawings and the specific embodiments thereof in order to make the objects, technical solutions and advantages of the present application more apparent.
Some concepts related to the embodiments of the present application will be described first as follows.
1. LTE-V2X resource selection procedure for long term evolution vehicle to the outside (Long Term Evolution Vehicle-to-evolution)
In Mode four (Mode 4), the basic mechanism of resource allocation is Sensing) +semi-persistent scheduling (SPS). The basic idea is that a User Equipment (UE, also called a terminal) node obtains the resource occupation condition of other UE nodes and the reservation condition of subsequent resources through real-time sending, and when the User Equipment has a data transmission requirement, selects appropriate resources through a resource selection/reselection process according to the information, and transmits data on the resources.
The resource selection/reselection procedure comprises the following two steps:
step1: removing resources in the resource selection window to obtain a candidate resource set;
step2: and selecting proper resources from the determined candidate resource set.
The above process mainly involves two windows: a sending window and a resource selection window, the time relationship between the two windows is shown in fig. 1.
The specific steps of resource selection/reselection are as follows:
step0: setting all candidate resources in the resource selection window to be available;
step1: removing resources in the resource selection window to obtain a candidate resource set;
step1-1: determining valid direct communication link control information (Sidelink Control Information, SCI, which may also be referred to as sidelink control information): if the next resource indicated by SCI of other nodes known within the sending window is about after time n, then the SCI is valid;
step1-2: skip (skip) subframe exclusion: if the resource selection UE in the sending window performs data transmission on some subframes, the subframes are called skip subframes, the subframes corresponding to the skip subframes in the candidate resource window are required to be excluded, and the period value is all periods of system configuration;
step1-3: reservation resource exclusion: the corresponding resources in the resource selection window are eliminated according to the effective SCI indication in Step1-1, and the elimination is only carried out when the measured value of the received power (Physical Sidelink Share Channel Reference Signal Receiving Power, PSSCH-RSRP) of the shared channel reference signal of the physical direct communication link corresponding to the SCI is higher than the RSRP threshold corresponding to the transceiver node;
step1-4: calculating the proportion of the remaining selectable resources in the selection window;
step1-5: if the proportion of the remaining selectable resources is greater than or equal to 20% of the total resources of the resource selection window, ending the resource elimination process; if the ratio of the remaining optional resources is less than 20%, increasing the RSRP threshold value of all the current receiving and transmitting nodes by 3dB, and carrying out step1 again;
step2: and selecting proper resources from the determined candidate resource set.
And for the residual resources which are not excluded in the resource selection window, the work rates are averaged and ranked, and 20% of the resources with lower smooth power are screened as a final candidate resource set.
Selecting transmission resources from the final candidate resource set according to the number of times (1 or 2) of data packet transmission; when a data packet is transmitted twice, subframes where two selected resources are located are respectively marked as Tn and Tn+k, and the conditions that k is less than or equal to 15 and k is not equal to 0 are required to be satisfied.
2. New air interface vehicle to outside (New Radio Vehicle-to-Everiving, NR-V2X) resource selection process
NR-V2X introduces a resource re-evaluation mechanism and a preemption mechanism on the basis of the LTE-V2X resource selection process.
Resource re-assessment mechanism: for a resource that has been selected but not reserved by the sent SCI, the UE may re-evaluate this resource and when the resource reselection condition is met, a resource reselection will occur, as shown in fig. 2.
Preemption mechanism: for resources reserved by the transmitted SCI, the UE may perform preemptive assessment of the resources, and when the resource reselection condition is met, the resource reselection will be performed, as shown in fig. 3.
Resource selection for periodic traffic:
when the UE performs resource reselection in the kth period, the kth+1 period may use the resource originally selected in the kth period as a pre-transmission resource in the kth+1 period, as shown in fig. 4; the actually transmitted resource after the reselection of the kth period can also be used as the pre-transmitted resource of the kth+1 period, as shown in fig. 5;
wherein, the non-filled frame represents the original selected resource in the kth period; the grid filling frame represents the actually transmitted resource after the k period reselection; half of the grid filling and half of the non-filling frames represent that the original selected resources in the kth period are not reselected and are actually transmitted; the diagonal filled boxes represent the pre-sent resources of the kth+1th cycle using the originally selected resources of the kth cycle; the vertical bar filled box represents the resource actually transmitted in the kth period as the pre-transmission resource in the kth+1 period.
For periodic service transmission, after resource reselection occurs in the kth period, whether in the manner of fig. 4 or fig. 5, there is a possibility that the pre-transmission resources in the kth+1 period do not satisfy the hybrid automatic repeat request round Trip Time (Hybrid Automatic Repeat Request Round-Trip Time, HARQ RTT) (shown in fig. 6) or the subsequent resource cannot be indicated by the SCI carried by the previous resource (shown in fig. 7), thereby affecting the system performance.
The embodiment of the application provides a resource reselection control method, a device and a terminal aiming at the problems.
As shown in fig. 8, the resource reselection control method in the embodiment of the present application is executed by a terminal, and includes:
step 81, for the periodically reserved transmission resources, performing reselection control on the pre-transmission resources in the mth period, so that the pre-transmission resources in the mth period meet a first condition;
it should be noted that, in the embodiment of the present application, m is an integer, preferably, m is an integer greater than or equal to 1, and the mth period is not the first period;
the first condition includes at least one of:
the first requirement of the hybrid automatic repeat request round-trip delay (HARQ RTT) is met between two adjacent front and rear resources;
the second requirement of the maximum window length indicated by the direct communication link control information SCI is fulfilled between two adjacent resources.
For example, when the periodically reserved transmission resource includes N periods, the period numbers are ordered from 1 to N, and the value of m satisfies: m is greater than or equal to 2, and m is less than or equal to N; for example, when the periodically reserved transmission resource includes N periods, the period numbers are ordered from 0 to N-1, and the value of m satisfies: m is greater than or equal to 1, and m is less than or equal to N-1.
In the embodiment of the application, the pre-sending resources in the mth period are subjected to reselection control according to the principle of ensuring that the pre-sending resources in the mth period meet the first condition, so that the requirements of HARQ RTT (hybrid automatic repeat request) or SCI (SCI) indication carried by the former resource by the pre-sending resources in other periods except the first period can be met, and the system performance is ensured.
In particular, the first requirement includes:
a11, the absolute value of the time difference between the third resource and the first resource is larger than or equal to a first preset value;
a12, the absolute value of the time difference between the third resource and the second resource is larger than or equal to a first preset value;
the third resource, the first resource and the second resource are three adjacent resources, the time sequence of the first resource is located before the third resource, and the time sequence of the second resource is located after the third resource.
That is, meeting the first requirement means that the absolute value of the time difference between the third resource and the front and rear resources needs to be greater than or equal to a first preset value, and further, the first preset value is determined by the HARQ RTT, for example, the first preset value may be equal to the HARQ RTT.
It should be noted that the first requirement is not satisfied includes at least one of the following:
a21, the absolute value of the time difference between the third resource and the first resource is smaller than a first preset value;
and A22, the absolute value of the time difference between the third resource and the second resource is smaller than a first preset value.
For example, A1, A2 and A3 are three consecutive resources, and if there is a time difference between A1 and A2 with an absolute value greater than or equal to the HARQ RTT and a time difference between A3 and A2 with an absolute value greater than or equal to the HARQ RTT, the first requirement of the HARQ RTT is satisfied between A2 and the two adjacent front and rear resources; if the absolute value of the time difference between A1 and A2 is larger than or equal to the HARQ RTT, and the absolute value of the time difference between A3 and A2 is smaller than the HARQ RTT, the first requirement of the HARQ RTT is not met between A2 and the adjacent front and rear resources; if the absolute value of the time difference between A1 and A2 is smaller than the HARQ RTT, and the absolute value of the time difference between A3 and A2 is larger than or equal to the HARQ RTT, the first requirement of the HARQ RTT is not met between A2 and the adjacent front and rear resources; if the absolute value of the time difference between A1 and A2 is smaller than the HARQ RTT and the absolute value of the time difference between A3 and A2 is smaller than the HARQ RTT, the first requirement of the HARQ RTT is not met between A2 and the adjacent front and rear resources.
In particular, the second requirement includes:
b11, the absolute value of the time difference between the third resource and the first resource is smaller than or equal to a second preset value;
b12, the absolute value of the time difference between the third resource and the second resource is smaller than or equal to a second preset value;
the third resource, the first resource and the second resource are three adjacent resources, the time sequence of the first resource is located before the third resource, and the time sequence of the second resource is located after the third resource.
That is, the absolute value of the time difference between the third resource and the front and rear resources satisfying the second requirement is required to be less than or equal to the second preset value, further, the second preset value is determined by the maximum window length indicated by the SCI, for example, the second preset value may be equal to the maximum window length-1 indicated by the SCI.
It should be noted that the second requirement is not satisfied includes at least one of the following:
b21, the absolute value of the time difference between the third resource and the first resource is larger than a second preset value;
and B22, the absolute value of the time difference between the third resource and the second resource is larger than a second preset value.
For example, B1, B2 and B3 are three consecutive resources, and if there is a time difference between B2 and B1 with an absolute value less than or equal to a second preset value, and the absolute value of the time difference between B2 and B3 is less than or equal to the second preset value, then the second requirement of the maximum window length indicated by SCI is satisfied between B2 and two adjacent resources; if the absolute value of the time difference between B2 and B1 is larger than a second preset value, and the absolute value of the time difference between B2 and B3 is smaller than or equal to the second preset value, the second requirement of the maximum window length indicated by SCI is not met between B2 and the adjacent front and rear resources; if the absolute value of the time difference between B2 and B1 is smaller than or equal to a second preset value, and the absolute value of the time difference between B2 and B3 is larger than the second preset value, the second requirement of the maximum window length indicated by SCI is not met between B2 and the adjacent front and rear resources; if the absolute value of the time difference between B2 and B1 is larger than the second preset value, the absolute value of the time difference between B2 and B3 is larger than the second preset value, and the second requirement of the maximum window length indicated by SCI is not met between B2 and the adjacent front and rear resources.
It should be noted that, when the third resource is the first resource in the period, it is only necessary to determine whether the third resource meets the requirement with the subsequent resource, and when the third resource is the last resource in the period, it is only necessary to determine whether the third resource meets the requirement with the previous resource.
In order to achieve the above object, embodiments of the present application are implemented in the following manner, and the following description is made in detail.
Specifically, the implementation manner of step 81 is:
and if the pre-sending resources in the mth period do not meet the first condition, carrying out resource reselection on the pre-sending resources in the mth period.
In this case, the pre-transmission resource is determined first, and the resource reselection is performed only when the pre-transmission resource does not satisfy the first condition, and in general, the terminal needs to determine each pre-transmission resource in the mth period.
It should be further noted that, if the pre-transmission resource in the mth period does not meet the first condition, a specific implementation manner of performing resource reselection on the pre-transmission resource in the mth period is as follows:
judging whether each pre-transmission resource in the pre-transmission resource set in the mth period meets a first condition;
when at least one pre-sent resource does not meet the first condition, triggering to reselect the pre-sent resource in the mth period, and generating a new resource set;
wherein the resources in the new set of resources satisfy the first condition;
the first condition includes a first requirement and a second requirement when the HARQ of the data packet is enabled;
the first condition includes a second requirement when HARQ of the data packet is not enabled.
That is, after the data packet of the mth period reaches, performing timing sequence decision on the resource scheduled to be sent by the terminal in the mth period, if the requirement of the maximum window length indicated by the SCI is not met between one resource and the front and rear two resources when the HARQ of the data packet is not enabled, initiating resource reselection, and after the resource reselection, each resource in the new resource set should meet the requirement of the maximum window length indicated by the SCI; when the HARQ of the data packet is enabled, if the requirement of the maximum window length indicated by SCI and/or the requirement of HARQ RTT are not met between one resource and the front and the rear two resources, resource reselection is initiated, and after the resource reselection, each resource in the new resource set should meet the requirement of the maximum window length indicated by SCI and the requirement of the HARQ RTT.
Further, the triggering performs resource reselection on the pre-sent resource in the mth period, and the generation of the new resource set may be implemented in two ways:
in the first implementation manner, reselection of all pre-sending resources in the pre-sending resource set in the mth period is triggered, and a new resource set is generated.
In this manner, as long as at least one pre-transmission resource does not satisfy the first condition, reselection of all pre-transmission resources in the period is triggered.
Specifically, the specific implementation process of the resource reselection control in this way is as follows:
step21: after the data packet of the mth period arrives, the terminal determines, for each resource Ri (i=1, 2 …) of all the resources scheduled to be transmitted by the terminal in the mth period, whether the following timing relationship is satisfied between the preceding resource (pre-R) and the following resource (pro-R):
the maximum window length-1 indicated by the I Ri-pre-R I is less than or equal to SCI; the maximum window length-1 indicated by I Ri-pro-R I is less than or equal to SCI;
meanwhile, when HARQ is enabled, the following timing relationship needs to be satisfied:
|Ri–pre-R|≥HARQ RTT；|Ri–pro-R|≥HARQ RTT；
wherein pre-R is empty when Ri is the first resource of the mth cycle and pro-R is empty when Ri is the last resource of the mth cycle.
Step22: when at least one of the above decisions is false, a reselection of all resources is triggered and a new resource Rj (j=1, 2 …) is generated and each resource Rj and its preceding (pre-R) and following (pro-R) resource are required to satisfy the following timing relationship:
the I Rj-pre-R I is less than or equal to the maximum window length-1 indicated by SCI; the I Rj-pro-R I is less than or equal to the maximum window length-1 indicated by SCI;
meanwhile, when HARQ is enabled, the following timing relationship needs to be satisfied:
|Rj–pre-R|≥HARQ RTT；|Rj–pro-R|≥HARQ RTT；
wherein pre-R is null when Rj is the first resource of the mth cycle and pro-R is null when Rj is the last resource of the mth cycle.
For example, as shown in fig. 9, R1, R2, R3 are pre-sent resources in the mth period, timing decision is performed on R1, R2, R3, and the decision result of the maximum window length-1 indicated by |r2-r3|+.sci is found to be "false", the reselection of R1, R2, R3 is triggered, new resources are generated as R4, R5, R6, and the new resources satisfy the following decision conditions:
the I Rj-pre-R I is less than or equal to the maximum window length-1 indicated by SCI; the I Rj-pro-R I is less than or equal to the maximum window length-1 indicated by SCI;
meanwhile, when HARQ is enabled, the following timing relationship needs to be satisfied:
|Rj–pre-R|≥HARQ RTT；|Rj–pro-R|≥HARQ RTT。
triggering to reselect preset resources in the preset resource set to generate a new resource set;
wherein, the preset resources are: the resource in the pre-sending resource set when the mth period data packet arrives is different from the resource in the pre-sending resource set when the mth-1 period data packet arrives.
In this case, the new resource set includes: the reselected resource is the same resource in the pre-transmission resource set when the mth periodic data packet arrives as the pre-transmission resource set when the mth-1 periodic data packet arrives.
It should be noted that m-1 should be greater than or equal to 0.
Specifically, the specific implementation process of the resource reselection control in this way is as follows:
step31: after the data packet of the mth period arrives, the terminal determines, for each resource Ri (i=1, 2 …) of all the resources scheduled to be transmitted by the terminal in the mth period, whether the following timing relationship is satisfied between the preceding resource (pre-R) and the following resource (pro-R):
the maximum window length-1 indicated by the I Ri-pre-R I is less than or equal to SCI; the maximum window length-1 indicated by I Ri-pro-R I is less than or equal to SCI;
meanwhile, when HARQ is enabled, the following timing relationship needs to be satisfied:
|Ri–pre-R|≥HARQ RTT；|Ri–pro-R|≥HARQ RTT；
wherein pre-R is empty when Ri is the first resource of the mth cycle and pro-R is empty when Ri is the last resource of the mth cycle.
Step32: when at least one of the above decisions is false, only the different resources in the pre-transmission resource set when the mth period data packet arrives and the pre-transmission resource set when the mth-1 period data packet arrives are reselected, the new set of the resources after no reselection and reselection is Rj (j=1, 2 …), and the following timing relationship is required to be satisfied between each resource Rj and the preceding resource (pre-R) and the following resource (pro-R):
the I Rj-pre-R I is less than or equal to the maximum window length-1 indicated by SCI; the I Rj-pro-R I is less than or equal to the maximum window length-1 indicated by SCI;
meanwhile, when HARQ is enabled, the following timing relationship needs to be satisfied:
|Rj–pre-R|≥HARQ RTT；|Rj–pro-R|≥HARQ RTT；
wherein pre-R is null when Rj is the first resource of the mth cycle and pro-R is null when Rj is the last resource of the mth cycle.
For example, as shown in FIG. 10, R1, R2 and R3 represent the set of pre-sent resources at the arrival time of the m-1 th periodic packet; p1, P2 and P3 represent pre-sending resource sets when the mth periodic data packet reaches the moment, only R3 and P3 are different in the two sets, and P1 and P2 are periodic repetition of R1 and R2. Performing time sequence judgment on P1, P2 and P3, and finding that the judgment result of the maximum window length-1 indicated by I P2-P3I is false; only reselection to P3 resources is triggered. The P3' after reselection satisfies the following judgment conditions:
the maximum window length of the I P3' -pre-R I is less than or equal to the maximum window length-1 indicated by SCI; the maximum window length of I P3' -pro-R I is less than or equal to the maximum window length-1 indicated by SCI;
meanwhile, when HARQ is enabled, the following timing relationship needs to be satisfied:
|P3’–pre-R|≥HARQ RTT；|P3’–pro-R|≥HARQ RTT。
it should be noted that, the formulas on the left of the inequality in the embodiment of the present application each represent the absolute value of the time difference between two resources.
It should be noted that, in the embodiment of the present application, for the transmission of the periodic service, the problem that the HARQ RTT is not satisfied between the pre-transmission resources or the SCI indication that the subsequent resource cannot be carried by the previous resource, thereby affecting the system performance, so as to improve the communication reliability and ensure the system performance is avoided.
As shown in fig. 11, the embodiment of the present application further provides a resource reselection control device 110, which is applied to a terminal, and includes:
a control module 111, configured to perform reselection control on a pre-transmission resource in an mth period with respect to a periodically reserved transmission resource, so that the pre-transmission resource in the mth period meets a first condition;
wherein the first condition includes at least one of:
the first requirement of the hybrid automatic repeat request round-trip delay (HARQ RTT) is met between two adjacent front and rear resources;
the second requirement of the maximum window length indicated by the direct communication link control information SCI is fulfilled between two adjacent resources.
Optionally, the control module 111 is configured to:
and if the pre-sending resources in the mth period do not meet the first condition, carrying out resource reselection on the pre-sending resources in the mth period.
Further, the control module 111 includes:
a judging unit configured to judge whether each of the pre-transmission resources in the pre-transmission resource set in the mth period satisfies a first condition;
a reselection unit, configured to trigger to perform resource reselection on the pre-transmission resource in the mth period when at least one pre-transmission resource does not meet the first condition, and generate a new resource set;
wherein the resources in the new set of resources satisfy the first condition;
the first condition includes a first requirement and a second requirement when the HARQ of the data packet is enabled;
the first condition includes a second requirement when HARQ of the data packet is not enabled.
Specifically, the reselection unit is configured to:
triggering reselection of all pre-sent resources in the pre-sent resource set in the mth period to generate a new resource set; or alternatively
Triggering to reselect preset resources in the preset resource set to generate a new resource set;
wherein, the preset resources are: the resource in the pre-sending resource set when the mth period data packet arrives is different from the resource in the pre-sending resource set when the mth-1 period data packet arrives.
Optionally, the first requirement includes:
the absolute value of the time difference between the third resource and the first resource is larger than or equal to a first preset value;
the absolute value of the time difference between the third resource and the second resource is larger than or equal to a first preset value;
the third resource, the first resource and the second resource are three adjacent resources, the time sequence of the first resource is positioned before the third resource, and the time sequence of the second resource is positioned after the third resource;
the first preset value is determined by HARQ RTT.
Optionally, the second requirement includes:
the absolute value of the time difference between the third resource and the first resource is smaller than or equal to a second preset value;
the absolute value of the time difference between the third resource and the second resource is smaller than or equal to a second preset value;
the third resource, the first resource and the second resource are three adjacent resources, the time sequence of the first resource is positioned before the third resource, and the time sequence of the second resource is positioned after the third resource;
the second preset value is determined by the maximum window length indicated by SCI.
It should be noted that, the embodiment of the resource reselection control device is a device corresponding to the embodiment of the method, and all the implementation manners in the embodiment of the method are applicable to the embodiment of the device, so that the same technical effects can be achieved.
As shown in fig. 12, an embodiment of the present application further provides a terminal 120, including a processor 121, a transceiver 122, a memory 123, and a program stored on the memory 123 and executable on the processor 121; the transceiver 122 is connected to the processor 121 and the memory 123 through a bus interface, where the processor 121 is configured to read a program in the memory, and perform the following procedures:
for the periodically reserved transmission resources, performing reselection control on the pre-transmission resources in the mth period, so that the pre-transmission resources in the mth period meet a first condition;
wherein the first condition includes at least one of:
the first requirement of the hybrid automatic repeat request round-trip delay (HARQ RTT) is met between two adjacent front and rear resources;
the second requirement of the maximum window length indicated by the direct communication link control information SCI is fulfilled between two adjacent resources.
It should be noted that in fig. 12, the bus architecture may include any number of interconnected buses and bridges, and in particular, one or more processors represented by processor 121 and various circuits of the memory represented by memory 123, linked together. The bus architecture may also link together various other circuits such as peripheral devices, voltage regulators, power management circuits, etc., which are well known in the art and, therefore, will not be described further herein. The bus interface provides an interface. Transceiver 122 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 user interface 124 may also be an interface capable of interfacing with an internal connection requiring device for a different terminal, including but not limited to a keypad, display, speaker, microphone, joystick, etc. The processor 121 is responsible for managing the bus architecture and general processing, and the memory 123 may store data used by the processor 121 in performing operations.
Optionally, the processor performs the following steps when executing the program for performing reselection control on the pre-transmission resource in the mth period:
and if the pre-sending resources in the mth period do not meet the first condition, carrying out resource reselection on the pre-sending resources in the mth period.
Optionally, when executing the program for reselecting the pre-sent resource in the mth period if the pre-sent resource in the mth period does not meet the first condition, the processor performs the following steps:
judging whether each pre-transmission resource in the pre-transmission resource set in the mth period meets a first condition;
when at least one pre-sent resource does not meet the first condition, triggering to reselect the pre-sent resource in the mth period, and generating a new resource set;
wherein the resources in the new set of resources satisfy the first condition;
the first condition includes a first requirement and a second requirement when the HARQ of the data packet is enabled;
the first condition includes a second requirement when HARQ of the data packet is not enabled.
Optionally, when executing the program that triggers resource reselection on the pre-sent resources in the mth period and generates a new resource set, the processor implements the following steps:
triggering reselection of all pre-sent resources in the pre-sent resource set in the mth period to generate a new resource set; or alternatively
Triggering to reselect preset resources in the preset resource set to generate a new resource set;
wherein, the preset resources are: the resource in the pre-sending resource set when the mth period data packet arrives is different from the resource in the pre-sending resource set when the mth-1 period data packet arrives.
Specifically, the first requirement includes:
the absolute value of the time difference between the third resource and the first resource is larger than or equal to a first preset value;
the absolute value of the time difference between the third resource and the second resource is larger than or equal to a first preset value;
the third resource, the first resource and the second resource are three adjacent resources, the time sequence of the first resource is positioned before the third resource, and the time sequence of the second resource is positioned after the third resource;
the first preset value is determined by HARQ RTT.
In particular, the second requirement includes:
the absolute value of the time difference between the third resource and the first resource is smaller than or equal to a second preset value;
the absolute value of the time difference between the third resource and the second resource is smaller than or equal to a second preset value;
the third resource, the first resource and the second resource are three adjacent resources, the time sequence of the first resource is positioned before the third resource, and the time sequence of the second resource is positioned after the third resource;
the second preset value is determined by the maximum window length indicated by SCI.
The embodiment of the application also provides a readable storage medium, wherein the readable storage medium stores a computer program, and the program realizes the steps of a resource reselection control method applied to a terminal when being executed by a processor.
The embodiment of the application further provides a chip, the chip comprises a processor and a communication interface, the communication interface is coupled with the processor, the processor is used for running programs or instructions, the processes of the embodiment of the resource reselection control method can be realized, the same technical effects can be achieved, and the repetition is avoided, and the description is omitted here.
It should be understood that the chips referred to in the embodiments of the present application may also be referred to as system-on-chip chips, chip systems, or system-on-chip chips, etc.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element. Furthermore, it should be noted that the scope of the methods and apparatus in the embodiments of the present application is not limited to performing the functions in the order shown or discussed, but may also include performing the functions in a substantially simultaneous manner or in an opposite order depending on the functions involved, e.g., the described methods may be performed in an order different from that described, and various steps may be added, omitted, or combined. Additionally, features described with reference to certain examples may be combined in other examples.
From the above description of the embodiments, it will be clear to those skilled in the art that the above-described embodiment method may be implemented by means of software plus a necessary general hardware platform, but of course may also be implemented by means of hardware, but in many cases the former is a preferred embodiment. Based on such understanding, the technical solution of the present application may be embodied essentially or in a part contributing to the prior art in the form of a software product stored in a storage medium (e.g. ROM/RAM, magnetic disk, optical disk) comprising instructions for causing a terminal (which may be a mobile phone, a computer, a server, an air conditioner, or a network device, etc.) to perform the method according to the embodiments of the present application.
While the foregoing is directed to the preferred embodiments of the present application, it will be appreciated by those skilled in the art that various modifications and changes can be made without departing from the principles of the present application, and such modifications and changes are intended to be within the scope of the present application.
Claims (7)
1. A resource reselection control method, performed by a terminal, comprising:
for the periodically reserved transmission resources, performing reselection control on the pre-transmission resources in the mth period, so that the pre-transmission resources in the mth period meet a first condition;
wherein the first condition includes at least one of:
the first requirement of the hybrid automatic repeat request round-trip delay (HARQ RTT) is met between two adjacent front and rear resources;
the second requirement of the maximum window length indicated by the direct communication link control information SCI is met between the adjacent front and rear resources;
the re-selection control of the pre-sent resource in the mth period comprises the following steps:
if the pre-sending resource in the mth period does not meet the first condition, performing resource reselection on the pre-sending resource in the mth period, including:
judging whether each pre-transmission resource in the pre-transmission resource set in the mth period meets a first condition;
when at least one pre-sent resource does not meet the first condition, triggering to reselect the pre-sent resource in the mth period, and generating a new resource set;
wherein the resources in the new set of resources satisfy the first condition;
the first condition includes a first requirement and a second requirement when the HARQ of the data packet is enabled;
the first condition includes a second requirement when HARQ of the data packet is not enabled.
2. The method for controlling resource reselection according to claim 1, wherein the triggering performs resource reselection on the pre-sent resource in the mth period, and generating a new resource set includes:
triggering reselection of all pre-sent resources in the pre-sent resource set in the mth period to generate a new resource set; or alternatively
Triggering to reselect preset resources in the preset resource set to generate a new resource set;
wherein, the preset resources are: the resource in the pre-sending resource set when the mth period data packet arrives is different from the resource in the pre-sending resource set when the mth-1 period data packet arrives.
3. The resource reselection control method of any of claims 1-2, wherein the first requirement comprises:
the absolute value of the time difference between the third resource and the first resource is larger than or equal to a first preset value;
the absolute value of the time difference between the third resource and the second resource is larger than or equal to a first preset value;
the third resource, the first resource and the second resource are three adjacent resources, the time sequence of the first resource is positioned before the third resource, and the time sequence of the second resource is positioned after the third resource;
the first preset value is determined by HARQ RTT.
4. The resource reselection control method of any of claims 1-2, wherein the second requirement comprises:
the absolute value of the time difference between the third resource and the first resource is smaller than or equal to a second preset value;
the absolute value of the time difference between the third resource and the second resource is smaller than or equal to a second preset value;
the third resource, the first resource and the second resource are three adjacent resources, the time sequence of the first resource is positioned before the third resource, and the time sequence of the second resource is positioned after the third resource;
the second preset value is determined by the maximum window length indicated by SCI.
5. A terminal, comprising: a processor, a memory and a computer program stored on the memory and executable on the processor, which when executed by the processor, implements the steps of the resource reselection control method of any of claims 1 to 4.
6. A resource reselection control device applied to a terminal, characterized by comprising:
the control module is used for carrying out reselection control on the pre-sent resources in the mth period for the periodically reserved sent resources so that the pre-sent resources in the mth period meet a first condition;
wherein the first condition includes at least one of:
the first requirement of the hybrid automatic repeat request round-trip delay (HARQ RTT) is met between two adjacent front and rear resources;
the second requirement of the maximum window length indicated by the direct communication link control information SCI is met between the adjacent front and rear resources;
the control module is configured to reselect the pre-transmission resource in the mth period if the pre-transmission resource in the mth period does not meet the first condition;
the control module comprises:
a judging unit configured to judge whether each of the pre-transmission resources in the pre-transmission resource set in the mth period satisfies a first condition;
a reselection unit, configured to trigger to perform resource reselection on the pre-transmission resource in the mth period when at least one pre-transmission resource does not meet the first condition, and generate a new resource set;
wherein the resources in the new set of resources satisfy the first condition;
the first condition includes a first requirement and a second requirement when the HARQ of the data packet is enabled;
the first condition includes a second requirement when HARQ of the data packet is not enabled.
7. A readable storage medium, characterized in that the readable storage medium has stored thereon a computer program which, when executed by a processor, implements the steps of the resource reselection control method of any one of claims 1 to 4.
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