CN117835412A - Method and equipment for transmitting data in V2X communication - Google Patents
Method and equipment for transmitting data in V2X communication Download PDFInfo
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Abstract
The application provides a data transmission method in V2X communication, and the technical scheme provided by the application is that in each period P, UE only carries out channel detection in fewer subframes, so that the electric quantity loss of the UE can be effectively reduced. The size of the detection window for channel detection by the UE may be not smaller than the minimum value Wm defined by the standard, or the size of the channel detection window in a stable state by the UE with Wm, and when a specific condition is satisfied, the UE may temporarily expand the channel detection window or change the position of the channel detection window, thereby ensuring that an effective channel detection result can be obtained when a channel is selected. The UE can preferentially select the transmission resources according to the channel detection result, and when the channel detection result is unavailable or the resources in the detection range can not meet the UE requirements, the UE can be complemented by a random resource selection mode. The method provided by the application can ensure the performance of V2X communication with lower complexity, and simultaneously effectively reduce the energy loss of the UE.
Description
The present application is a divisional application of the invention patent application with the application date of 2016, 08 and 11 and the application number of 201610657551.4.
Technical Field
The present application relates to the field of mobile communications technologies, and in particular, to a V2X (Vehicle to Vehicle/petestrian/Infrastructure/Network) communication method and apparatus.
Background
Currently, device-to-Device (D2D) communication technology has been accepted by the 3GPP standard by virtue of its great potential value in the public safety field and the general civilian communication field, and standardization of part of functions has been achieved in 3GPP Rel-12 and Rel-13. The 3GPP Rel-12 standard currently defines two modes of D2D broadcast communication, simply referred to as Mode 1 (Mode 1) and Mode 2 (Mode 2).
The UE where Mode 1 requires that the D2D broadcast communication be sent must be a UE located under the coverage of the cellular network. The UE acquires configuration information of a bypass control channel (PSCCH, physical Sidelink Control CHannel) resource pool of Mode 1 by receiving system broadcast signaling sent by the eNB, wherein the configuration information includes a PSCCH period and a subframe position used for PSCCH transmission in each period, and a physical resource block (PRB, physical Resource Block) position used for PSCCH transmission in each subframe, and the UE detects a bypass scheduling (Sidelink Grant) of the eNB before each PSCCH period, and obtains resource positions of a PSCCH and a bypass data channel (PSCCH, physical Sidelink Shared CHannel) sent in the PSCCH period. In Mode 1, resource collision between different UEs can be avoided through centralized control by the eNB.
The UE transmitting D2D broadcast communications through Mode 2 may be located within the coverage area of the cellular network or may be a UE located outside the coverage area of the cellular network. The method comprises the steps of obtaining a PSCCH resource pool of Mode 2 and a corresponding PSSCH resource pool configuration through receiving eNB system broadcast signaling, wherein the PSSCH resource pool comprises subframe positions used for PSSCH transmission in a corresponding PSCCH period and physical resource block positions used for PSSCH transmission in each subframe, and randomly selecting PSCCH and transmission resources of the corresponding PSSCH in each PSCCH period. The latter determines the configuration of PSCCH resource pool of Mode 2 and corresponding PSSCH resource pool through preconfiguration information, and the resource selection Mode is the same as the former. In a typical D2D communication environment, the number of D2D communication transmitting UEs In each cell is 3, so that the problems of resource collision, in-band Interference (IBE) and the like, which may be caused by random resource selection, are not optimized In the 3GPP standard making process.
Because the standardized D2D communication in 3GPP Rel-12 is mainly aimed at low-speed UEs and has low requirements for time-lapse sensitivity and reliability of reception, the implemented D2D functions still cannot meet the user requirements far enough, and in the following various versions of 3GPP, the functional framework for further enhancing D2D is a broad consensus of various communication UE manufacturers and communication network equipment manufacturers at present. Among them, supporting direct low-latency high-reliability communication between high-speed devices, between high-speed devices and low-speed devices, and between high-speed devices and stationary devices, i.e., V2X (Vehicle to Vehicle/perderusting/Infrastructure/Network), is one of functions requiring priority standardization based on the current D2D broadcast communication mechanism.
One of the main features of V2X communication is a higher transmit UE density compared to existing D2D communication. For example, in urban traffic congestion environments (average speed 15 km/h), the number of vehicles per square kilometer can reach 2400. According to the V2X communication service model specified by ETSI (european telecommunications standards institute, european Telecommunication Standards Institute), the vehicle generates a V2X packet approximately every 1 second, and in general, the message needs to be sent out within 100ms after the generation, and the density of V2X transmitting UEs is significantly greater than D2D. According to the conclusion of the current 3GPP, V2X communication will follow the Mode 2 Mode defined in D2D, i.e. the transmitting UE may autonomously select resources within a certain resource pool, however, the large increase in the density of the transmitting UE makes V2X communication unable to follow the random resource selection manner in the Mode 2 Mode of D2D, otherwise the resulting collision of resources and IBE interference will seriously affect the performance of V2X communication. To address this problem, 3GPP agrees to introduce a channel detection mechanism in V2X communication, that is, V2X UE will detect the interference level in candidate resources, and select resources whose interference level satisfies the corresponding condition when autonomous resource selection is performed.
According to the conclusion of the current 3GPP, the V2X UE should perform channel detection in the currently selected resource pool, if the V2X UE performs resource selection in the subframe n, the UE predicts the idle resources after n according to the channel detection result in the time range of [ n-a, n-b ], wherein a-b should not be less than 1s so as to acquire sufficiently accurate resource occupation information. However, in P2V (person-to-vehicle communication, pedestrian to Vehicle), the type of UE transmitting data is a Pedestrian hand-held terminal (PUE, petestrian UE), and unlike a car, this type of UE cannot withstand power consumption caused by long-time channel detection. For this purpose, the 3GPP makes preliminary decisions that the PUE can randomly select transmission resources. However, the random resource selection method cannot avoid resource collision and In-Band leakage Interference (IBE) between different UEs, and when the number of PUEs is large, the performance of the V2X communication system will be seriously affected.
Through the above analysis, it can be seen that a resource selection method capable of reducing power consumption and avoiding mutual interference between UEs is needed in a P2V communication scenario, but such a method is not disclosed at present.
Disclosure of Invention
The object of the present application is to solve at least one of the above technical drawbacks, and in particular to provide a method and an apparatus for data transmission in V2X communication, including:
if the resource selection mode of the resource pool currently selected by the UE is configured to be based on channel detection, the UE selects a part of subframes belonging to the selected resource pool within the range of P milliseconds ms as a channel detection window and repeats the process with P as a period;
after channel detection, the UE selects a transmission resource and transmits data.
Preferably, P is the minimum granularity of the resource occupation period of all UEs in the current resource pool and the minimum value of the current service delay requirement of the UEs.
Preferably, the UE adjusts the channel detection window when a specific condition is satisfied.
Preferably, W subframes of the channel detection window are consecutive in time, W is not smaller than Wm, and the value of W may vary throughout the channel detection process;
where Wm represents the minimum value of the channel detection window that the UE must maintain.
Preferably, the UE adds subframes to the channel detection window, or the UE removes some subframes from the channel detection window, and after removing, the number of subframes in the channel detection window that undergo more than I times of channel detection is not less than Wm, where I is a specific value, indicating the number of times that resources in the channel detection window are least detected before obtaining a valid detection result.
Preferably, the UE expands and then compresses the channel detection window, and the number of subframes subjected to channel detection more than I times in the channel detection window after the channel selection window is compressed should be not less than Wm; or,
the UE directly changes the position of the channel detection window.
Preferably, the sub-frames included in the enlarged channel detection window are supersets of the channel detection window before enlargement; the subframe distribution of the enlarged channel detection window is continuous in time;
after the UE enlarges the channel detection window i×p ms, the channel detection window is reduced to Wm, and the subframe distribution of the reduced channel detection window is still continuous.
Preferably, the UE selects the transmission resource from the channel selection window in subframe n, and subframe m in the channel selection window of the UE should satisfy the following condition:
the subframe m-P belongs to a channel detection window of the UE, the UE performs channel detection on the subframe m-i, m-n is more than c_min, and the subframe n- (m-P) is more than or equal to b;
wherein i=1, 2, …, I;
c_ min is a specific value representing the minimum time for the UE to encode the control channel and the data channel；
b is a specific value indicating the time required for the UE to process the channel detection result.
Preferably, if the number of subframes in the channel selection window is zero, the UE randomly selects a transmission resource between subframes n+c_min and n+d_max, where d_max is the maximum delay of the current traffic.
Preferably, the UE selects the transmission resource only within the determined channel selection window, or if the energy on the resources within the current channel selection window is higher than a certain threshold, the UE randomly selects the transmission resource between the subframes n+c_min and n+d_max, or if the energy on the resources within the current channel selection window is higher than a certain threshold, the UE randomly selects the transmission resource in the subframes outside the channel selection window between n+c_min and n+d_max.
An apparatus for data transmission in V2X communication, comprising:
the channel detection window determining module is used for selecting a part of subframes belonging to the selected resource pool within the range of P milliseconds ms as a channel detection window and repeating with P as a period under the condition that the resource selection mode of the resource pool currently selected by the UE is configured to be based on channel detection;
a resource selection module for selecting a transmission resource after channel detection;
and the data transmission module is used for transmitting data by using the selected transmission resources.
According to the technical scheme, the UE detects the channels in each period P in fewer subframes, so that the electric quantity loss of the UE can be effectively reduced. The size of the detection window for channel detection by the UE may be not smaller than the minimum value Wm defined by the standard, or the size of the channel detection window in a stable state by the UE with Wm, and when a specific condition is satisfied, the UE may temporarily expand the channel detection window or change the position of the channel detection window, thereby ensuring that an effective channel detection result can be obtained when a channel is selected. The UE can preferentially select the transmission resources according to the channel detection result, and when the channel detection result is unavailable or the resources in the detection range can not meet the UE requirements, the UE can be complemented by a random resource selection mode. The method provided by the application can ensure the performance of V2X communication with lower complexity, and simultaneously effectively reduce the energy loss of the UE.
Drawings
FIG. 1 is a flow chart of the implementation steps of the technical proposal provided in the application;
fig. 2 is a schematic diagram of a possible distribution of channel detection windows and channel selection windows in the first embodiment;
FIG. 3 is a diagram illustrating a method for changing a channel detection window according to a second embodiment;
fig. 4 is a schematic diagram of continuously expanding the channel detection window and compressing the channel detection window in the third embodiment;
fig. 5 is a schematic diagram of discontinuous expansion of the channel detection window and compression of the channel detection window in the third embodiment;
FIG. 6 is a block diagram of the apparatus set forth in the present application;
Detailed Description
For the purposes of making the objects, technical solutions and advantages of the present application more apparent, the present application will be described in further detail below with reference to the accompanying drawings and examples.
Hereinafter, unless specifically stated, the UEs refer to V2X UEs.
In V2X communication, if a UE transmitting data is a PUE, a mechanism defined by the current 3GPP for selecting transmission resources based on 1s channel detection is not applicable to the PUE because the UE cannot withstand long-time channel detection due to the limitation of battery power of the UE. Conversely, if the reduction of the power consumption of the UE is considered with great importance, the performance of the V2X communication system may be affected by adopting a mechanism of random resource selection, especially when the number of PUEs is large. For this purpose, the present application proposes a method for data transmission in V2X communication, as shown in fig. 1, including the following steps:
step 110: if the resource selection manner of the currently selected resource pool of the UE is configured to be based on channel detection, the UE determines a channel detection window within the currently selected resource pool.
The currently selected resource pool of the UE may be all time-frequency resources on the current working carrier, or a subset of all time-frequency resources on the current carrier, which is not limited in the manner of determining the resource pool configuration and selecting the resource pool by the UE. Hereinafter, unless otherwise specified, the subframes refer to subframes in a set of subframes in which the UE currently selects a resource pool.
The UE may determine the resource selection configuration of the currently selected resource pool according to eNB signaling or pre-configuration, and the resource pool may be a random resource selection manner or a resource selection manner based on channel detection. If the former, the UE may directly perform step 130.
The channel detection window of the UE consists of W subframes belonging to the selected resource pool in the range of P ms and repeats with P as a period. Wherein the value of P may be defined by a standard or configured or preconfigured by the eNB into a memory device of the UE, and represents a minimum granularity of a semi-static occupied resource of the transmitting UE in the current V2X communication environment, for example, p=100 ms. Alternatively, P may be the minimum granularity of the resource occupation period of all UEs in the current resource pool and the minimum value of the delay requirement of the current service of the UE, for example, if the minimum granularity of the resource occupation period of all UEs in the resource pool is 200ms, that is, the resource occupation period may be 200ms,400ms, …,1s, and the delay requirement of the current service of the UE is 100ms, the repetition period of the channel detection window of the UE should be 100ms. The minimum value Wm of W may be defined by a standard, configured by the eNB, preconfigured into the memory device of the UE, or determined by the UE implementation, wm+.p, for example wm=10 ms.
The W subframes of the channel detection window may be distributed in any way within P ms, preferably, the W subframes of the channel detection window are consecutive in time.
Step 120: when a specific condition is satisfied, the UE adjusts a channel detection window.
The specific condition is defined by a standard, and the specific condition may be, but is not limited to, that the resource load in the current channel detection window is too heavy, or that the proportion of occupied resources in the current channel detection window is higher than a certain threshold, or that a related indication of the eNB is received, or that the network state is changed. When the specific condition is not satisfied, the UE may directly perform step 130. Further, the absolute time to perform step 120 may be later than step 130.
When the channel detection window is adjusted, the UE may expand and compress the channel detection window, and the size of the channel detection window after expansion is not limited in this application (only the number of subframes in the channel detection window, the same applies below). It should be noted that the operation of the UE to extend the channel detection window may be performed together with step 110, i.e. the channel detection window is determined according to the size after the extension. When the UE compresses the channel selection window, it should be guaranteed that at least Wm subframes in the compressed channel detection window undergo more than I channel detections, where I is defined by a standard, indicating the minimum number of times resources are detected in the channel detection window, e.g. i=10, before a valid detection result is obtained.
When adjusting the channel detection window, the UE may also directly change the position of the channel detection window, and the size of the channel detection window should be not less than Wm after the change.
Step 130: after the resource detection, the UE selects a transmission resource and transmits data.
The UE should first select transmission resources within the channel selection window and if the UE selects resources in subframe n, the UE determines the channel selection window from the nearest one channel detection window before subframe n. For any one subframe m within the channel selection window, the following conditions must be met:
the subframe m-P belongs to a channel detection window of the UE; furthermore, the processing unit is configured to,
the UE performs channel detection on subframes m-i×p, where i=1, 2, …, I; furthermore, the processing unit is configured to,
m-n > c_min, where c_min is a specific value, which may be defined by a standard, e.g. c_min=2 ms; furthermore, the processing unit is configured to,
subframe n- (m-P) > b, where b is a specific value, which may be a standard defined value, e.g. b=1.
If no resources are available within the channel selection window, the UE may randomly select transmission resources within a range that meets the latency requirement.
In order to facilitate understanding of the present application, the following further describes the above technical solution of the present application in a mode of interaction between devices in combination with a specific application case, which is specifically as follows:
embodiment one:
in this embodiment, the UE uses W as the size of the channel detection window, where W is greater than or equal to Wm, determines a channel selection window corresponding to the channel detection window in subframe n, and then selects a transmission resource in the channel selection window. According to the method of the present embodiment, the UE may autonomously determine the size and position of the channel detection window and when to adjust the channel detection window. However, the UE needs to ensure that at any time point, at least Wm subframes in the resource detection window undergo channel detection more than I times, so that the UE always has an effective channel detection result as a basis for channel selection. The specific method comprises the following steps:
step 210: the UE determines a channel detection window.
In this embodiment, the size W of the channel detection window should be not smaller than Wm, and the value of W may be changed during the whole channel detection process, that is, the UE may remove some subframes from the channel detection window and may also include new subframes into the channel selection window, but when the UE removes subframes from the channel detection window, the number of subframes subjected to channel detection more than I times in the channel detection window after the removal should not be smaller than W subframes in which the WmUE may randomly select the channel detection window in the P range, and the distribution of W subframes may be continuous in time.
Step 220: and the UE selects the transmission resource in the corresponding channel selection window according to the channel detection result in the subframe n.
In this embodiment, the UE should ensure that at least Wm subframes have undergone more than I channel detections in the channel detection window at any time point (except for the time of i×p after the UE is turned on or the time of i×p after the V2X communication function of the UE is started).
The subframe m within the channel selection window of the UE should satisfy the following condition:
the subframe m-P belongs to a channel detection window of the UE; furthermore, the processing unit is configured to,
the UE performs channel detection on subframes m-i×p, where i=1, 2, …, I; furthermore, the processing unit is configured to,
m-n > c_min, where c_min is a specific value, which may be defined by a standard, e.g. c_min=2 ms; furthermore, the processing unit is configured to,
subframe n- (m-P) > b, where b is a specific value, which may be a standard defined value, e.g. b=1.
According to one implementation of this embodiment, the UE selects transmission resources only within a determined channel selection window. According to another implementation method of the present application, if the energy (predicted according to the channel detection result) on the resources in the current channel selection window is higher than a certain specific threshold, the UE randomly selects the transmission resource between the subframes n+c_min and n+d_max, where d_max is the maximum delay of the current service. According to yet another implementation of the present application, if the energy on the resources in the current channel selection window (predicted according to the channel detection result) is higher than a certain threshold, the UE randomly selects the transmission resource in the subframes outside the channel selection window between n+c_min and n+d_max.
In this embodiment, a possible distribution of the channel detection window and the channel selection window is shown in fig. 2, where in the example, p=100 ms, and i=10.
This embodiment ends. In this embodiment, only the minimum value of the size of the resource detection window is limited, and the UE may perform channel detection according to its own capability, and ensure that resources subjected to I channel detection exist at any time point of resource selection for determining the channel selection window. The method can minimize standard workload on the premise of ensuring the effectiveness of channel detection.
Embodiment two:
in this embodiment, the UE uses Wm as the size of the channel detection window, and when a specific condition is satisfied, the UE changes the position of the channel detection window, and the size of the channel detection window after the change of the position is the same as that of the original channel detection window, and there may be overlap between them. The UE determines a channel selection window from the channel detection window and then selects transmission resources within the channel selection window. Because the UE always carries out channel detection by using a channel detection window with the size of Wm, the energy loss of the UE can be reduced to the maximum extent. However, after the UE changes the channel detection window, the UE may need to perform resource selection before I channel detections are completed for new resources within the channel detection window, at which point the new resources within the channel detection window cannot be used as a reference for channel selection. Therefore, if the UE cannot determine the channel selection window, or if there are no available resources within the channel selection window, the UE may randomly select transmission resources within a range satisfying the delay requirement. The specific method comprises the following steps:
step 310: the UE determines a channel detection window.
In this embodiment, the size of the channel selection window is Wm, and the distribution of Wm subframes may be continuous in time.
Step 320: when the specific condition is met, the UE adjusts a channel detection window;
the specific condition is defined by a standard, and the specific condition may be, but is not limited to, that the resource load in the current channel detection window is too heavy, or that the proportion of occupied resources in the current channel detection window is higher than a certain threshold, or that a related indication of the eNB is received, or that the network state is changed. When the specific condition is not satisfied, the UE may directly perform step 330. Further, the absolute time to perform step 320 may be later than step 330.
In this embodiment, the UE directly changes the position of the channel detection window, and after the change, the size of the channel detection window is still Wm, and there may be overlap or no overlap between the UE and the original channel detection window, as shown in fig. 3.
Step 330: and the UE selects the transmission resource in the corresponding channel selection window according to the channel detection result in the subframe n.
In this embodiment, the UE may select the transmission resource within the channel selection window, and the subframe m within the channel selection window of the UE should satisfy the following condition:
the subframe m-P belongs to a channel detection window of the UE; furthermore, the processing unit is configured to,
the UE performs channel detection on subframes m-i×p, where i=1, 2, …, I; furthermore, the processing unit is configured to,
m-n > c_min, where c_min is a specific value, which may be defined by a standard, e.g. c_min=2 ms; furthermore, the processing unit is configured to,
subframe n- (m-P) > b, where b is a specific value, which may be a standard defined value, e.g. b=1.
If the number of subframes within the channel selection window is zero (i.e., no subframes within the channel detection window have undergone I channel detections), the UE randomly selects transmission resources between subframes n+c_min and n+d_max.
If the energy (predicted according to the channel detection result) on the resources in the current channel selection window is higher than a specific threshold, the method for selecting and transmitting the resources by the UE is the same as the first embodiment.
This embodiment ends. In this embodiment, the size of the channel detection window of the UE is Wm in any case, and after the UE adjusts the channel detection window, if the UE needs to perform resource selection, the resources in the new channel detection window are not detected for a sufficient number of times, and the UE may select the transmission resources by means of random selection. Therefore, this approach can reduce the energy loss of the UE to the greatest possible extent.
Embodiment III:
in this embodiment, the UE uses Wm as the size of the channel detection window, and when a specific condition is satisfied, the UE may expand the size of the channel detection window, and the channel detection window after expansion must be a superset of the original channel detection window, before expanding the channel detection window i×p, the UE needs to perform channel detection on the resources in the original channel detection window and the newly introduced resources at the same time, so as to ensure that the channel detection result that is still valid before finishing I times of channel detection on the new resources in the channel detection window is used as a reference for channel selection. After expanding the channel detection window i×p ms, the UE should re-narrow the channel detection window to Wm. The specific method comprises the following steps:
step 410: the UE determines a channel detection window.
In this embodiment, the size of the channel selection window is Wm, and the distribution of Wm subframes may be continuous in time.
Step 420: when the specific condition is met, the UE adjusts a channel detection window;
the specific condition is defined by a standard, and the specific condition may be, but is not limited to, that the resource load in the current channel detection window is too heavy, or that the proportion of occupied resources in the current channel detection window is higher than a certain threshold, or that a related indication of the eNB is received, or that the network state is changed. When the specific condition is not satisfied, the UE may directly perform step 430. Further, the absolute time to perform step 420 may be later than step 430.
In this embodiment, the sub-frames included in the extended channel detection window must be a superset of the original channel detection window. The subframe distribution of the extended channel detection window may be continuous in time as shown in fig. 4; or, the channel detection window after the expansion of the UE includes an original channel detection window and another newly added channel detection window with still Wm, where the new channel detection window is located without overlapping with the original channel detection window, as shown in fig. 5.
After the UE enlarges the channel detection window i×p, the channel detection window should be reduced to Wm, and the subframe distribution of the reduced channel detection window may still be continuous. If the specific condition for the UE to adjust the channel detection window is still satisfied at this time, the UE should adjust the channel detection window again in the same way.
Step 430: and the UE selects the transmission resource in the corresponding channel selection window according to the channel detection result in the subframe n.
In this embodiment, the UE may select the transmission resource within the channel selection window, and the subframe m within the channel selection window of the UE should satisfy the following condition:
the subframe m-P belongs to a channel detection window of the UE; furthermore, the processing unit is configured to,
the UE performs channel detection on subframes m-i×p, where i=1, 2, …, I; furthermore, the processing unit is configured to,
m-n > c_min, where c_min is a specific value, which may be defined by a standard, e.g. c_min=2 ms; furthermore, the processing unit is configured to,
subframe n- (m-P) > b, where b is a specific value, which may be a standard defined value, e.g. b=1.
If the energy (predicted according to the channel detection result) on the resources in the current channel selection window is higher than a specific threshold, the method for selecting and transmitting the resources by the UE is the same as the first embodiment.
This embodiment ends. In this embodiment, the UE only temporarily increases the size of the channel detection window during the channel detection window adjustment process, and only increases the short-time energy loss compared to the second embodiment. In the process of increasing the channel detection window, the UE continuously detects the resources in the original channel detection window, so that at any time point, at least Wm subframes in the channel detection window are subjected to channel detection for more than I times, and therefore, the UE can determine an effective channel selection window at any time point, and the quality of the transmission resources selected by the UE is guaranteed.
The application also discloses a device for transmitting data in V2X communication, the composition structure of which is shown in FIG. 6, comprising: the device comprises a first channel detection window determining module, a channel detection window adjusting module and a resource selecting module, wherein:
the channel detection window determining module is used for determining the position, the size and the repetition period of the channel detection window and adjusting the channel detection window when the specific condition is met;
the resource selection module is used for selecting a transmission resource according to the channel detection result;
a data transmission module for transmitting data using the selected transmission resource
Those of ordinary skill in the art will appreciate that all or a portion of the steps carried out in the method of the above-described embodiments may be implemented by a program to instruct related hardware, where the program may be stored in a computer readable storage medium, and where the program, when executed, includes one or a combination of the steps of the method embodiments.
In addition, each functional unit in each embodiment of the present application may be integrated in one processing module, or each unit may exist alone physically, or two or more units may be integrated in one module. The integrated modules may be implemented in hardware or in software functional modules. The integrated modules may also be stored in a computer readable storage medium if implemented in the form of software functional modules and sold or used as a stand-alone product.
The above-mentioned storage medium may be a read-only memory, a magnetic disk or an optical disk, or the like.
The foregoing description of the preferred embodiments of the present invention is not intended to limit the invention to the precise form disclosed, and any modifications, equivalents, improvements and alternatives falling within the spirit and principles of the present invention are intended to be included within the scope of the present invention.
Claims (9)
1. A method performed by a user equipment, UE, in a wireless communication system, comprising:
determining a channel detection window based on a minimum number Wm of subframes for channel detection, wherein the channel detection window comprises a number of subframes greater than or equal to Wm, in a case where the resource pool is configured as a resource selection manner based on channel detection;
performing channel detection in the channel detection window;
based on the channel detection result, resources for bypass transmission are determined from the resource pool.
2. The method according to claim 1, characterized in that: the information of the minimum amount Wm is received from a base station or defined in a standard.
3. The method according to claim 1, characterized in that: the channel detection window further includes subframes with an index of m-i×p, where m is any subframe in the channel selection window, P is a period, i=1, 2, …, I.
4. A method according to claim 3, characterized in that:
p is the minimum granularity of the resource occupation period of all the UE in the resource pool and the minimum value in the current service delay requirement of the UE.
5. A method according to claim 3, characterized in that: p is configured by the base station or defined in the standard.
6. The method according to claim 1, characterized in that: further comprises:
and when a specific condition is met, adjusting the channel detection window.
7. The method according to claim 1, characterized in that:
the W subframes of the channel detection window are consecutive in time, W being not smaller than Wm.
8. The method of claim 2, wherein the determining resources for bypass transmission from the resource pool based on the channel detection result comprises:
determining resources for bypass transmission from the resource pool based on the channel detection result in subframe n,
wherein m-n is greater than c_min, and the subframe n- (m-P) is greater than or equal to b;
c_ min a specific value representing a minimum time for the UE to encode the control channel and the data channel;
b is a specific value indicating the time required for the UE to process the channel detection result.
9. A terminal device, the terminal device comprising:
a memory storing computer-executable instructions; and
a processor;
wherein the computer executable instructions, when executed by the processor, cause the processor to perform the method of any of claims 1 to 8.
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| WO2019229907A1 (en) * | 2018-05-30 | 2019-12-05 | 株式会社Ｎｔｔドコモ | Communication device |
| CN112398593B (en) * | 2019-08-13 | 2024-08-16 | 上海朗帛通信技术有限公司 | Method and apparatus in a node for wireless communication |
| CN112714414B (en) * | 2020-04-29 | 2022-05-03 | 宸芯科技有限公司 | Resource selection scheme determination method, device, terminal and storage medium |
| CN114071507B (en) * | 2020-08-07 | 2024-05-14 | 维沃移动通信有限公司 | Acquisition method, device and terminal of detection window |
| CN116746261A (en) * | 2021-01-19 | 2023-09-12 | Oppo广东移动通信有限公司 | Resource monitoring method in user equipment and side uplink communication |
| CN115190447A (en) * | 2021-04-06 | 2022-10-14 | 大唐移动通信设备有限公司 | Resource selection method and terminal equipment |
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