CN114640422A - Resource reselection control method, device and terminal - Google Patents
Resource reselection control method, device and terminal Download PDFInfo
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- CN114640422A CN114640422A CN202011488841.3A CN202011488841A CN114640422A CN 114640422 A CN114640422 A CN 114640422A CN 202011488841 A CN202011488841 A CN 202011488841A CN 114640422 A CN114640422 A CN 114640422A
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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
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Abstract
The invention provides a resource reselection control method, a resource reselection control 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 resource, performing reselection control on the pre-transmission resource in the mth period to enable the pre-transmission resource in the mth period to meet a first condition; wherein the first condition comprises at least one of: the first requirement of hybrid automatic repeat request round trip delay HARQ RTT is met between the adjacent front and back resources; the second requirement of the maximum window length indicated by the direct communication link control information SCI is satisfied between the adjacent front and back resources. The invention improves the communication reliability and ensures the system performance.
Description
Technical Field
The present invention 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 the transmission of the periodic service, after the resource reselection occurs in the current period, there may be a problem that the Hybrid Automatic Repeat Request Round-Trip Time (HARQ RTT) 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 (SCI, which may also be referred to as Sidelink Control Information) carried by the previous resource), thereby affecting the system performance.
Disclosure of Invention
The embodiment of the invention provides a resource reselection control method, a resource reselection control device and a terminal, and aims to solve the problem that for the transmission of a periodic service, due to the fact that resource reselection occurs in the previous period, the pre-transmission resource in the next period does not meet HARQ RTT (hybrid automatic repeat request) or the next resource cannot be indicated by SCI (resource identity) carried by the previous resource, and the system performance is affected.
In order to solve the foregoing technical problem, an embodiment of the present invention provides a resource reselection control method, executed by a terminal, including:
for the periodically reserved transmission resource, performing reselection control on the pre-transmission resource in the mth period to enable the pre-transmission resource in the mth period to meet a first condition;
wherein the first condition comprises at least one of:
the first requirement of hybrid automatic repeat request (HARQ RTT) is met between the adjacent front and back resources;
the second requirement of the maximum window length indicated by the direct communication link control information SCI is satisfied between the adjacent front and back resources.
Optionally, the performing reselection control on the pre-transmission resource in the m-th period includes:
and if the pre-sent resource in the m period does not meet the first condition, performing resource reselection on the pre-sent resource in the m period.
Optionally, if the pre-transmission resource in the m-th period does not satisfy the first condition, performing resource reselection on the pre-transmission resource in the m-th period includes:
judging whether each pre-transmission resource in the pre-transmission resource set in the m period meets a first condition;
when at least one pre-transmission resource does not meet the first condition, triggering to perform resource reselection on the pre-transmission resource in the m period to generate a new resource set;
wherein the resources in the new set of resources satisfy the first condition;
the first condition comprises a first requirement and a second requirement when 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 resource reselection on the pre-sent resource in the m-th period to generate a new resource set includes:
triggering the reselection of all pre-sent resources in the pre-sent resource set in the m period to generate a new resource set; or alternatively
Triggering to reselect the preset resources in the pre-sent resource set to generate a new resource set;
wherein the preset resources are: and different resources are arranged in the pre-sending resource set when the data packet of the m-th period arrives and the pre-sending resource set when the data packet of the m-1 th period arrives.
Optionally, the first requirement comprises:
the absolute value of the time difference between the third resource and the first resource is greater than or equal to a first preset value;
the absolute value of the time difference between the third resource and the second resource is greater than or equal to a first preset value;
the third resource, the first resource and the second resource are three adjacent resources, the timing sequence of the first resource is positioned before the third resource, and the timing sequence of the second resource is positioned after the third resource;
the first preset value is determined by HARQ RTT.
Optionally, the second requirement comprises:
the absolute value of the time difference between the third resource and the first resource is less than or equal to a second preset value;
the absolute value of the time difference between the third resource and the second resource is less than or equal to a second preset value;
the third resource, the first resource and the second resource are three adjacent resources, the timing sequence of the first resource is before the third resource, and the timing sequence of the second resource is after the third resource;
the second preset value is determined by the maximum window length indicated by the SCI.
An embodiment of the present invention further provides a terminal, including: a processor, a memory and a computer program stored on the memory and executable on the processor, the computer program, when executed by the processor, implementing the steps of the resource reselection control method described above.
The embodiment of the present invention further provides a resource reselection control apparatus, which is applied to a terminal, and includes:
the control module is used for reselecting and controlling the pre-transmission resource in the mth period for the periodically reserved transmission resource so that the pre-transmission resource in the mth period meets a first condition;
wherein the first condition comprises at least one of:
the first requirement of hybrid automatic repeat request round trip delay HARQ RTT is met between the adjacent front and back resources;
the second requirement of the maximum window length indicated by the direct communication link control information SCI is satisfied between the adjacent front and back resources.
An embodiment of the present invention further provides a readable storage medium, where a computer program is stored on the readable storage medium, and when the computer program is executed by a processor, the steps of the resource reselection control method are implemented.
The invention has the beneficial effects that:
according to the scheme, the pre-transmission resources in the mth period are subjected to reselection control, so that the pre-transmission resources in the mth period meet the first condition, and the problem that the transmission of the periodic service cannot meet HARQ RTT between the pre-transmission resources in the next period or the next resource cannot be indicated by SCI carried by the previous resource due to resource reselection in the previous period, and the system performance is influenced is solved.
Drawings
FIG. 1 is a diagram illustrating a temporal relationship between a sending window and a resource selection window;
FIG. 2 is a schematic diagram of a re-evaluation mechanism;
fig. 3 shows a schematic diagram of the preemption mechanism;
fig. 4 is a schematic diagram illustrating that the originally selected resource in the k-th period is used as the pre-transmission resource in the k + 1-th period;
fig. 5 is a schematic diagram illustrating that a resource actually transmitted after reselection in the k-th period is used as a pre-transmission resource in the k + 1-th period;
fig. 6 is a diagram illustrating that HARQ RTT is not satisfied between pre-transmission resources of the (k + 1) th cycle;
FIG. 7 is a diagram illustrating an indication that a subsequent resource cannot be carried by a previous resource;
FIG. 8 is a flowchart illustrating a resource reselection control method according to an embodiment of the present invention;
FIG. 9 is a schematic diagram illustrating one of the time slot relationships of a resource before and after reselection;
FIG. 10 is a second schematic diagram illustrating a time slot relationship between resources before and after reselection;
FIG. 11 shows a block schematic of an apparatus according to an embodiment of the invention;
fig. 12 is a block diagram of a terminal according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in detail with reference to the accompanying drawings and specific embodiments.
Some concepts related to embodiments of the present invention are first explained below.
First, a Long Term Evolution Vehicle to outside (LTE-V2X) resource selection process
In Mode four (Mode4), the basic mechanism for resource allocation is Sensing) + semi-persistent scheduling (SPS). The basic idea is that a User Equipment (UE, also called a terminal) node learns resource occupation conditions of other UE nodes and reservation conditions of subsequent resources through real-time sending, and when the UE has a data transmission requirement, selects appropriate resources through a resource selection/reselection process according to the information, and performs data transmission on the resources.
The resource selection/reselection process comprises the following two steps:
step 1: excluding resources in the resource selection window to obtain a candidate resource set;
step 2: selecting a suitable resource from the determined candidate resource set.
The above process mainly involves two windows: a sending window and a resource selection window, and the time relationship between the two windows is shown in fig. 1.
The specific steps of resource selection/reselection are as follows:
step 0: setting all candidate resources in the resource selection window as available;
step 1: excluding the resources in the resource selection window to obtain a candidate resource set;
step 1-1: determining valid direct communication link Control Information (SCI, which may also be referred to as Sidelink Control Information): if the next resource forecast indicated by SCI of other nodes known in the sensing window is about n times later, the SCI is valid;
step 1-2: 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 corresponding periodically reserved subframes of the skip subframes in the candidate resource window need to be excluded, and the period value is all periods configured by the system;
step 1-3: and (3) removing reserved resources: excluding the corresponding resource in the resource selection window according to the valid SCI indication in Step1-1, and excluding only when the Physical direct communication link shared Channel Reference Signal received Power (PSSCH-RSRP) measurement value corresponding to the SCI is higher than the RSRP threshold corresponding to the transceiving node;
step 1-4: calculating the proportion of the remaining selectable resources in the selection window;
step 1-5: if the proportion of the remaining optional resources is more than or equal to 20 percent of the total resources of the resource selection window, ending the resource exclusion process; if the proportion of the remaining optional resources is less than 20%, increasing the RSRP threshold values of all current transceiving nodes by 3dB, and performing step1 again;
step 2: selecting a suitable resource from the determined candidate resource set.
And for the residual resources which are not excluded in the resource selection window, performing power averaging and sequencing, and screening 20% of resources with lower smooth power to serve as a final candidate resource set.
Selecting transmission resources from the final candidate resource set according to the number of times (1 or 2 times) of data packet transmission; when a data packet is transmitted twice, the subframes where the two selected resources are located are respectively marked as Tn and Tn + k, and the conditions that k is greater than or equal to-15 and less than or equal to 15 and k is not equal to 0 need to be satisfied.
Second, a New Radio Vehicle-to-outside (NR-V2X) resource selection process
The NR-V2X introduces a resource re-evaluation mechanism and a preemption mechanism on the basis of the LTE-V2X resource selection process.
Resource reevaluation mechanism: for a resource that has been selected but not reserved by a transmitted SCI, the UE may re-evaluate this resource and when a resource reselection condition is met, a resource reselection will occur, as shown in fig. 2.
A preemption mechanism: for the resource reserved by the sent SCI, the UE may perform preemption evaluation on the resource, and when the resource reselection condition is satisfied, perform resource reselection, as shown in fig. 3.
Resource selection for periodic traffic:
after the UE reselects resources in the kth period, the kth +1 period may use the originally selected resources in the kth period as pre-transmission resources in the kth +1 period, as shown in fig. 4; the resource actually transmitted after the reselection in the k-th period may also be used as the pre-transmission resource in the k + 1-th period, as shown in fig. 5;
wherein, the non-filled box represents the originally selected resource in the k period; the grid filling frame represents the actually transmitted resources after the k period reselection; half grid filling and half non-filling frames represent that the originally selected resources in the kth period are not reselected and are actually sent; the slash filling frame represents that the originally selected resource in the kth period is adopted as the pre-sending resource in the kth +1 period; the vertical line filled box represents that the resource actually transmitted in the k period is adopted as the pre-transmission resource in the k +1 period.
For the transmission of the periodic service, after the resource reselection occurs in the k-th period, no matter the method shown in fig. 4 or fig. 5 is adopted, there is a possibility that the problem that Hybrid Automatic Repeat Request Round-Trip Time (HARQ RTT) (shown in fig. 6) is not satisfied between the pre-transmission resources in the k + 1-th period or the SCI indication (shown in fig. 7) that the next resource cannot be carried by the previous resource is caused, thereby affecting the system performance.
Embodiments of the present invention provide a method, an apparatus, and a terminal for controlling resource reselection, which aim at the above problems.
As shown in fig. 8, a resource reselection control method according to an embodiment of the present invention is executed by a terminal, and includes:
it should be noted that m in the embodiment of the present invention 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 hybrid automatic repeat request round trip delay HARQ RTT is met between the adjacent front and back resources;
the second requirement of the maximum window length indicated by the direct communication link control information SCI is satisfied between the adjacent front and back resources.
For example, when the periodically reserved transmission resource includes N cycles, the cycle numbers are sorted 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 cycles, the cycle numbers are sorted 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 invention, the pre-sent resources in the m-th period are reselected and controlled according to the principle of ensuring that the pre-sent resources in the m-th period meet the first condition, so that the pre-sent resources in other periods except the first period can meet the HARQ RTT requirement or the requirement that the next resource is indicated by the SCI carried by the previous resource, and the system performance is ensured.
Specifically, the first requirement includes:
a11, the absolute value of the time difference between the third resource and the first resource is greater 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 greater than or equal to a first preset value;
the third resource, the first resource and the second resource are three adjacent resources, the timing sequence of the first resource is before the third resource, and the timing sequence of the second resource is 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 two previous and subsequent 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 and 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 less than the first preset value.
For example, a1, a2 and A3 are three consecutive resources, and if the absolute value of the time difference between a1 and a2 is greater than or equal to the HARQ RTT and the absolute value of the time difference between A3 and a2 is greater than or equal to the HARQ RTT, the first requirement of the HARQ RTT is satisfied between a2 and its adjacent two resources; if the absolute value of the time difference between A1 and A2 is greater 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 two 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 two 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 satisfied between a2 and the two adjacent front and rear resources.
Specifically, the second requirement includes:
b11, the absolute value of the time difference between the third resource and the first resource is less 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 less than or equal to a second preset value;
the third resource, the first resource and the second resource are three adjacent resources, the timing sequence of the first resource is before the third resource, and the timing sequence of the second resource is after the third resource.
That is, the absolute value of the time difference between the third resource satisfying the second requirement finger and the two previous and subsequent resources is required to be less than or equal to a second preset value, and 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-1 of the maximum window length indicated by the SCI.
It should be noted that the second requirement is not satisfied and includes at least one of the following:
b21, the absolute value of the time difference between the third resource and the first resource is greater than a second preset value;
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 the absolute value of the time difference between B2 and B1 is less than or equal to the 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, the second requirement of the maximum window length indicated by the SCI is satisfied between B2 and its adjacent two resources; if the absolute value of the time difference between B2 and B1 is greater than 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, a 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, a 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 greater than the second preset value, and the absolute value of the time difference between B2 and B3 is greater 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.
It should be noted that, when the third resource is the first resource in the period, it only needs to determine whether the third resource and the following resource meet the requirement, and when the third resource is the last resource in the period, it only needs to determine whether the third resource and the preceding resource meet the requirement.
In order to achieve the above object, the embodiments of the present invention are realized in the following ways, which are specifically described below.
Specifically, the implementation manner of step 81 is:
and if the pre-sent resource in the m period does not meet the first condition, performing resource reselection on the pre-sent resource in the m period.
It should be noted that, 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 it should be noted that, in general, the terminal needs to determine each pre-transmission resource in the m-th period.
It should be further noted that, if the pre-transmission resource in the m-th period does not satisfy the first condition, a specific implementation manner of performing resource reselection on the pre-transmission resource in the m-th period is as follows:
judging whether each pre-transmission resource in the pre-transmission resource set in the m period meets a first condition;
when at least one pre-transmission resource does not meet the first condition, triggering to perform resource reselection on the pre-transmission resource in the m period to generate a new resource set;
wherein the resources in the new set of resources satisfy the first condition;
the first condition comprises a first requirement and a second requirement when 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 m-th period is reached, performing timing judgment on the resource scheduled to be sent by the terminal in the m-th period, when the HARQ of the data packet is not enabled, if the requirement of the maximum window length indicated by the SCI is not satisfied between one resource and the two previous and subsequent resources, initiating resource reselection, and after the resource reselection, each resource in the new resource set should satisfy 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 the SCI and/or the requirement of the HARQ RTT are not satisfied between one resource and the two resources, resource reselection is initiated, and after the resource reselection, each resource in the new resource set should satisfy the requirement of the maximum window length indicated by the 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 adopt the following two implementation manners:
the first implementation manner is to trigger reselection of all pre-transmission resources in the pre-transmission resource set in the m-th period to generate a new resource set.
It should be noted that, in this way, as long as at least one pre-transmission resource does not satisfy the first condition, all pre-transmission resources within the period are triggered to be reselected.
Specifically, the specific implementation process of the resource reselection control in this manner is as follows:
step 21: after the data packet of the m-th period arrives, the terminal determines whether the following timing relationship is satisfied between the terminal and the preceding resource (pre-R) and the following resource (pro-R) for each resource Ri (i ═ 1,2 …) of all the resources that the terminal plans to transmit in the m-th period:
the maximum window length indicated by SCI is less than or equal to | Ri-pre-R | -1; i Ri-pro-R | ≦ the maximum window length indicated by SCI-1;
meanwhile, when HARQ is enabled, the following timing relationship is also required:
|Ri–pre-R|≥HARQ RTT；|Ri–pro-R|≥HARQ RTT；
and when Ri is the first resource of the mth period, pre-R is null, and when Ri is the last resource of the mth period, pro-R is null.
Step 22: when at least one of the above decisions is false, triggering reselection of all resources and generating new resources Rj (j equals 1,2 …), and requiring that the following timing relationship be satisfied between each resource Rj and its preceding resource (pre-R) and its following resource (pro-R):
the maximum window length indicated by SCI is less than or equal to-1 in | Rj-pre-R |; the maximum window length indicated by SCI is less than or equal to-1 in | Rj-pro-R |;
meanwhile, when HARQ is enabled, the following timing relationship is also required:
|Rj–pre-R|≥HARQ RTT；|Rj–pro-R|≥HARQ RTT；
and when Rj is the first resource of the mth period, pre-R is null, and when Rj is the last resource of the mth period, pro-R is null.
For example, as shown in fig. 9, R1, R2, and R3 are pre-transmission resources of the m-th period, timing decisions are made on R1, R2, and R3, and it is found that the result of the decision that | R2-R3 | ≦ the maximum window length-1 indicated by SCI is "false", reselection of R1, R2, and R3 is triggered, and new resources are generated as R4, R5, and R6, and the new resources satisfy the following decision conditions:
the maximum window length indicated by SCI is less than or equal to-1 in | Rj-pre-R |; the maximum window length indicated by SCI is less than or equal to-1 in | Rj-pro-R |;
meanwhile, when HARQ is enabled, the following timing relationship is also required:
|Rj–pre-R|≥HARQ RTT；|Rj–pro-R|≥HARQ RTT。
triggering to reselect the preset resources in the pre-sent resource set to generate a new resource set;
wherein the preset resources are: and different resources are arranged in the pre-sending resource set when the data packet of the m-th period arrives and the pre-sending resource set when the data packet of the m-1 th period arrives.
In this case, the new resource set includes: and the reselected resources and the same resources in the pre-transmission resource set when the m-th period data packet arrives as the pre-transmission resource set when the m-1-th period data packet arrives.
In addition, m-1 is 0 or more.
Specifically, the specific implementation process of the resource reselection control in this manner is as follows:
step 31: after the data packet of the m-th period arrives, the terminal determines whether the following timing relationship is satisfied between the terminal and the preceding resource (pre-R) and the following resource (pro-R) for each resource Ri (i ═ 1,2 …) of all the resources that the terminal plans to transmit in the m-th period:
i Ri-pre-R I is less than or equal to the maximum window length indicated by SCI of-1; i Ri-pro-R | ≦ the maximum window length indicated by SCI-1;
meanwhile, when HARQ is enabled, the following timing relationship needs to be satisfied:
|Ri–pre-R|≥HARQ RTT；|Ri–pro-R|≥HARQ RTT；
and when Ri is the first resource of the mth period, pre-R is null, and when Ri is the last resource of the mth period, pro-R is null.
Step 32: when at least one of the above decisions is false, only those resources different from the pre-transmission resource set when the m-th period data packet arrives are reselected, the new set of resources after non-reselection and reselection is Rj (j equals 1,2 …), and each resource Rj and its preceding resource (pre-R) and following resource (pro-R) are required to satisfy the following timing relationship:
the maximum window length indicated by SCI is less than or equal to-1 in | Rj-pre-R |; the maximum window length indicated by SCI is less than or equal to-1 in | Rj-pro-R |;
meanwhile, when HARQ is enabled, the following timing relationship is also required:
|Rj–pre-R|≥HARQ RTT；|Rj–pro-R|≥HARQ RTT；
and when Rj is the first resource of the mth period, pre-R is null, and when Rj is the last resource of the mth period, pro-R is null.
For example, as shown in fig. 10, R1, R2 and R3 represent the pre-transmission resource sets at the arrival time of the m-1 th cycle data packet; p1, P2 and P3 represent pre-transmission resource sets of the m-th cycle data packet arrival time, only R3 and P3 in the two sets are different, and P1 and P2 are both periodical repetitions 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 SCI (absolute value less than or equal to | P2-P3) is false; only reselection of the P3 resource is triggered. The reselected P3' satisfies the following decision condition:
p3' -pre-R | ≦ the maximum window length indicated by SCI-1; p3' -pro-R | ≦ SCI indicating a maximum window length of-1;
meanwhile, when HARQ is enabled, the following timing relationship is also required:
|P3’–pre-R|≥HARQ RTT；|P3’–pro-R|≥HARQ RTT。
it should be noted that the formula on the left side of the inequality in the embodiment of the present invention all represents the absolute value of the time difference between two resources.
It should be noted that, for the sending of the periodic service, the embodiment of the present invention can avoid the problem that the HARQ RTT is not satisfied between the pre-sent resources or the subsequent resource cannot be indicated by the SCI carried by the previous resource, thereby affecting the system performance, so as to improve the communication reliability and ensure the system performance.
As shown in fig. 11, an embodiment of the present invention further provides a resource reselection control apparatus 110, which is applied to a terminal, and includes:
a control module 111, configured to reselect and control a pre-transmission resource in an m-th period for a periodically reserved transmission resource, so that the pre-transmission resource in the m-th period meets a first condition;
wherein the first condition comprises at least one of:
the first requirement of hybrid automatic repeat request round trip delay HARQ RTT is met between the adjacent front and back resources;
the second requirement of the maximum window length indicated by the direct communication link control information SCI is satisfied between the adjacent front and back resources.
Optionally, the control module 111 is configured to:
and if the pre-sent resource in the m period does not meet the first condition, performing resource reselection on the pre-sent resource in the m period.
Further, the control module 111 includes:
the judging unit is used for judging whether each pre-transmission resource in the pre-transmission resource set in the m-th period meets a first condition or not;
the reselection unit is used for triggering the resource reselection of the pre-transmission resources in the mth period to generate a new resource set when at least one pre-transmission resource does not meet a first condition;
wherein the resources in the new set of resources satisfy the first condition;
when HARQ of a data packet is enabled, the first condition comprises a first requirement and a second requirement;
the first condition includes a second requirement when HARQ of the data packet is not enabled.
Specifically, the reselection unit is configured to:
triggering the reselection of all pre-sent resources in the pre-sent resource set in the m period to generate a new resource set; or
Triggering to reselect the preset resources in the pre-sent resource set to generate a new resource set;
wherein the preset resources are: and different resources are arranged in the pre-sending resource set when the data packet of the m-th period arrives and the pre-sending resource set when the data packet of the m-1 th period arrives.
Optionally, the first requirement comprises:
the absolute value of the time difference between the third resource and the first resource is greater than or equal to a first preset value;
the absolute value of the time difference between the third resource and the second resource is greater than or equal to a first preset value;
the third resource, the first resource and the second resource are three adjacent resources, the timing sequence of the first resource is before the third resource, and the timing sequence of the second resource is after the third resource;
the first preset value is determined by HARQ RTT.
Optionally, the second requirement comprises:
the absolute value of the time difference between the third resource and the first resource is less than or equal to a second preset value;
the absolute value of the time difference between the third resource and the second resource is less than or equal to a second preset value;
the third resource, the first resource and the second resource are three adjacent resources, the timing sequence of the first resource is positioned before the third resource, and the timing sequence of the second resource is positioned after the third resource;
the second preset value is determined by the maximum window length indicated by the SCI.
It should be noted that the embodiment of the resource reselection control apparatus is an apparatus corresponding to the above method embodiments one to one, and all implementation manners in the above method embodiments are applicable to the embodiment of the apparatus, and the same technical effect can be achieved.
As shown in fig. 12, the embodiment of the present invention further provides a terminal 120, which includes a processor 121, a transceiver 122, a memory 123, and a program stored in the memory 123 and operable on the processor 121; the transceiver 122 is connected to the processor 121 and the memory 123 through a bus interface, wherein the processor 121 is configured to read a program in the memory and execute the following processes:
for the periodically reserved transmission resource, performing reselection control on the pre-transmission resource in the mth period to enable the pre-transmission resource in the mth period to meet a first condition;
wherein the first condition comprises at least one of:
the first requirement of hybrid automatic repeat request round trip delay HARQ RTT is met between the adjacent front and back resources;
the second requirement of the maximum window length indicated by the direct communication link control information SCI is satisfied between the adjacent front and back resources.
It should be noted that in fig. 12, the bus architecture may include any number of interconnected buses and bridges, with one or more processors represented by processor 121 and various circuits represented by memory 123 being linked together. The bus architecture may also link together various other circuits such as peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further herein. The bus interface provides an interface. The transceiver 122 may be a plurality of elements, including a transmitter and a transceiver, providing a means for communicating with various other apparatus over a transmission medium. For different terminals, the user interface 124 may also be an interface capable of interfacing with a desired device, including but not limited to a keypad, display, speaker, microphone, joystick, etc. The processor 121 is responsible for managing a bus architecture and general processing, and the memory 123 may store data used by the processor 121 when performing operations.
Optionally, when the processor executes the program for performing reselection control on the pre-transmission resource in the m-th period, the following steps are implemented:
and if the pre-sent resource in the m period does not meet the first condition, performing resource reselection on the pre-sent resource in the m period.
Optionally, the processor executes the program for performing resource reselection on the pre-transmission resource in the m-th period if the pre-transmission resource in the m-th period does not satisfy the first condition, and implements the following steps:
judging whether each pre-transmission resource in the pre-transmission resource set in the mth period meets a first condition or not;
when at least one pre-transmission resource does not meet the first condition, triggering to perform resource reselection on the pre-transmission resource in the m period to generate a new resource set;
wherein the resources in the new set of resources satisfy the first condition;
the first condition comprises a first requirement and a second requirement when 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 processor executes the program that triggers resource reselection of the pre-transmission resource in the m-th period and generates a new resource set, and 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
Triggering to reselect the preset resources in the pre-sent resource set to generate a new resource set;
wherein the preset resources are: and different resources are arranged in the pre-sending resource set when the data packet of the m-th period arrives and the pre-sending resource set when the data packet of the m-1 th period arrives.
Specifically, the first requirement includes:
the absolute value of the time difference between the third resource and the first resource is greater than or equal to a first preset value;
the absolute value of the time difference between the third resource and the second resource is greater than or equal to a first preset value;
the third resource, the first resource and the second resource are three adjacent resources, the timing sequence of the first resource is before the third resource, and the timing sequence of the second resource is after the third resource;
the first preset value is determined by HARQ RTT.
Specifically, the second requirement includes:
the absolute value of the time difference between the third resource and the first resource is less than or equal to a second preset value;
the absolute value of the time difference between the third resource and the second resource is less than or equal to a second preset value;
the third resource, the first resource and the second resource are three adjacent resources, the timing sequence of the first resource is before the third resource, and the timing sequence of the second resource is after the third resource;
the second preset value is determined by the maximum window length indicated by the SCI.
An embodiment of the present invention further provides a readable storage medium, where a computer program is stored on the readable storage medium, where the computer program, when executed by a processor, implements the steps of the resource reselection control method applied to the terminal.
The embodiment of the present invention further provides a chip, where the chip includes a processor and a communication interface, the communication interface is coupled to the processor, and the processor is configured to execute a program or an instruction to implement each process of the foregoing resource reselection control method embodiment, and can achieve the same technical effect, and in order to avoid repetition, details are not repeated here.
It should be understood that the chips mentioned in the embodiments of the present application may also be referred to as system-on-chip, system-on-chip or system-on-chip, 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 identified by the phrase "comprising an … …" does not exclude the presence of other identical elements in the process, method, article, or apparatus that comprises the element. Further, it should be noted that the scope of the methods and apparatus of the embodiments of the present application is not limited to performing the functions in the order illustrated or discussed, but may include performing the functions in a substantially simultaneous manner or in a reverse order based on the functions involved, e.g., the methods described may be performed in an order different than that described, and various steps may be added, omitted, or combined. In addition, features described with reference to certain examples may be combined in other examples.
Through the above description of the embodiments, those skilled in the art will clearly understand that the method of the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but in many cases, the former is a better implementation manner. Based on such understanding, the technical solutions of the present application may be embodied in the form of a software product, which is stored in a storage medium (such as ROM/RAM, magnetic disk, optical disk) and includes instructions for enabling a terminal (such as a mobile phone, a computer, a server, an air conditioner, or a network device) to execute the method according to the embodiments of the present application.
While the foregoing is directed to the preferred embodiment of the present invention, it will be appreciated by those skilled in the art that various changes and modifications may be made therein without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (9)
1. A resource reselection control method, executed by a terminal, includes:
for the periodically reserved transmission resources, performing reselection control on the pre-transmission resources in the mth period to enable the pre-transmission resources in the mth period to meet a first condition;
wherein the first condition comprises at least one of:
the first requirement of hybrid automatic repeat request round trip delay HARQ RTT is met between the adjacent front and back resources;
the second requirement of the maximum window length indicated by the direct communication link control information SCI is satisfied between the adjacent front and back resources.
2. The method according to claim 1, wherein the performing reselection control on the pre-sent resource in the m-th period comprises:
and if the pre-sent resource in the m period does not meet the first condition, performing resource reselection on the pre-sent resource in the m period.
3. The method according to claim 2, wherein the performing resource reselection on the pre-transmission resource in the m-th period if the pre-transmission resource in the m-th period does not satisfy the first condition comprises:
judging whether each pre-transmission resource in the pre-transmission resource set in the m period meets a first condition;
when at least one pre-transmission resource does not meet the first condition, triggering to perform resource reselection on the pre-transmission resource in the m period to generate a new resource set;
wherein the resources in the new set of resources satisfy the first condition;
the first condition comprises a first requirement and a second requirement when HARQ of the data packet is enabled;
the first condition includes a second requirement when HARQ of the data packet is not enabled.
4. The method according to claim 3, wherein the triggering resource reselection on the pre-sent resource in the m-th period to generate a new resource set comprises:
triggering the reselection of all pre-sent resources in the pre-sent resource set in the m period to generate a new resource set; or
Triggering to reselect the preset resources in the pre-sent resource set to generate a new resource set;
wherein the preset resources are: and different resources are arranged in the pre-sending resource set when the data packet of the m-th period arrives and the pre-sending resource set when the data packet of the m-1 th period arrives.
5. The resource reselection control method of any of claims 1-4, wherein the first requirement comprises:
the absolute value of the time difference between the third resource and the first resource is greater than or equal to a first preset value;
the absolute value of the time difference between the third resource and the second resource is greater than or equal to a first preset value;
the third resource, the first resource and the second resource are three adjacent resources, the timing sequence of the first resource is before the third resource, and the timing sequence of the second resource is after the third resource;
the first preset value is determined by HARQ RTT.
6. The resource reselection control method of any of claims 1-4, wherein the second requirement comprises:
the absolute value of the time difference between the third resource and the first resource is less than or equal to a second preset value;
the absolute value of the time difference between the third resource and the second resource is less than or equal to a second preset value;
the third resource, the first resource and the second resource are three adjacent resources, the timing sequence of the first resource is before the third resource, and the timing sequence of the second resource is after the third resource;
the second preset value is determined by the maximum window length indicated by the SCI.
7. A terminal, comprising: a processor, a memory and a computer program stored on the memory and executable on the processor, the computer program, when executed by the processor, implementing the steps of the resource reselection control method according to any of claims 1 to 6.
8. A resource reselection control device applied to a terminal is characterized by comprising:
the control module is used for carrying out reselection control on the pre-transmission resource in the mth period for the periodically reserved transmission resource so that the pre-transmission resource in the mth period meets a first condition;
wherein the first condition comprises at least one of:
the first requirement of hybrid automatic repeat request round trip delay HARQ RTT is met between the adjacent front and back resources;
the second requirement of the maximum window length indicated by the direct communication link control information SCI is satisfied between the adjacent front and back resources.
9. A readable storage medium, having stored thereon a computer program which, when being executed by a processor, carries out the steps of the resource reselection control method according to any of claims 1 to 6.
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