CN114126075B - Scheduling request processing method and system for 5G NR - Google Patents
Scheduling request processing method and system for 5G NR Download PDFInfo
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- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
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Abstract
A scheduling request processing method and system for 5G NR, particularly relating to the technical field of communication, comprises triggering an uplink resource scheduling request SR; after triggering the uplink resource scheduling request SR, judging whether a non-competitive random access triggering condition is met; if the non-competitive random access triggering condition is met, initiating a non-competitive random access request; before completing the non-competitive random access request, if a preset non-competitive random access cancellation condition is met, canceling the non-competitive random access request, and not entering a non-competitive random access process, wherein the preset non-competitive random access cancellation condition at least comprises: detecting valid PUCCH channel resources; by introducing a beam management mode and a non-competitive random access process, the reliability of the SR request process is enhanced, the transmission delay of uplink service is reduced, the interference between uplink signals in the system is reduced, and the transmission quality of uplink PUCCH signals, PUSCH signals and downlink signals is improved.
Description
Technical Field
The present disclosure relates to the field of communications technologies, and in particular, to a method and a system for processing a scheduling request for 5G NR.
Background
In the 5GNR system, when uplink service data arrives in a buffer of a User Equipment (UE), if the UE is in an RRC connected state and a resource corresponding to an uplink service data Scheduling Request (SR) is configured, a base station in a conventional technical scheme cannot know when the service data of the UE arrives, and the quality of a signal transmitted on a PUCCH channel carrying the SR greatly affects the capability of the base station to detect the SR. If the base station cannot detect the SR continuously, uplink service data transmission will cause a non-negligible delay. Under multiple users, the PUCCH channel resource overhead may increase, and uplink signal interference may also increase.
The PUCCH channel beam is typically beam selected and enabled for the UE by the base station through the MAC layer. It is considered that the UE can confirm the beam used by the PUCCH channel carrying the SR through a failure process of SR transmission requests continuously for a plurality of times, which requires a beam management process. Then the use of the MAC layer for beam selection and enabled notification may cause greater control delay.
Disclosure of Invention
In order to solve the technical problems in the prior art, the invention discloses a scheduling request processing method and a scheduling request processing system for 5G NR (virtual local area network), wherein the problem of delay caused by overlong waiting time of an uplink resource Scheduling Request (SR) is solved by introducing a non-competitive random access process in the process of triggering the SR and by an uplink and downlink beam management process.
According to an aspect of the present invention, a scheduling request processing method for a 5G NR includes: triggering an uplink resource Scheduling Request (SR); after triggering the uplink resource scheduling request SR, judging whether a non-competitive random access triggering condition is met; if the non-competitive random access triggering condition is met, initiating a non-competitive random access request; before completing the non-competitive random access request, if a preset non-competitive random access cancellation condition is met, canceling the non-competitive random access request, and not entering a non-competitive random access process, wherein the preset non-competitive random access cancellation condition at least comprises: detecting valid PUCCH channel resources; if the non-competitive random access triggering condition is not met, judging whether a preset parameter of the PUCCH channel resource configuration meets a first preset condition or not; if so, the operation of transmitting the uplink resource scheduling request SR to the base station is effectively carried out; if not, determining that the non-competitive random access triggering condition is met and the non-competitive random access canceling condition is not met, and entering a non-competitive random access process.
Further optionally, before triggering the SR, the method further includes: configuring periodic or aperiodic SRS resources by RRC, carrying out uplink beam management process by periodically or aperiodically transmitting SRS uplink beam scanning signals, determining transmitting beams and receiving beams of PUSCH (physical uplink shared channel) resources and PUCCH (physical uplink control channel) resources by a base station, and informing the UE of the results of the transmitting beam and the receiving beam selection.
Further optionally, in the step of determining the transmission beam and the reception beam of the PUSCH channel resource and the PUCCH channel resource by the base station, the optimal transmission beam of the PUCCH channel resource needs to be determined, and the determining method includes: the method comprises the steps of scanning a synchronization block SSB sent by a PDCCH channel resource or scanning an aperiodic downlink measurement pilot CSI-RS receiving beam to determine an optimal receiving beam, and determining an optimal transmitting beam of the PUCCH channel resource through the optimal receiving beam.
Further optionally, the preset non-contention random access cancellation condition includes: receiving a UL-grant allocated by a base station on a PDCCH, and not sending acknowledgement cancellation information in the non-contention random access process to the base station; or monitoring that the uplink resource scheduling request SR has configured effective PUCCH resources and does not send acknowledgement cancellation information in the non-contention random access process to the base station.
Further optionally, the preset parameters of the PUCCH channel resource configuration include: an SR prohibiting timer, SR maximum transmission times, an SR counter and an SR beam management threshold.
Further optionally, the first preset condition includes: judging whether an SR prohibit timer is in operation at the moment in the parameter configured by the uplink resource scheduling request SR; if not, the first preset condition is determined to be met.
According to another aspect of the present invention, a base station includes: a transmitting module configured to transmit an RRC message to a user terminal, the RRC message comprising a transmit beam and a receive beam indicating PUSCH channel resources and PUCCH channel resources; the transmitting module configures one or more PUSCH (physical uplink shared channel) resources or one or more PUCCH (physical uplink control channel) resources for the user terminal; the receiving module executes an SR request if the receiving module detects an effective uplink resource scheduling request SR in PUCCH channel resources; and if the receiving module detects an effective uplink resource scheduling request SR in the non-competitive random access resource, the receiving module instructs the user terminal to re-determine the optimal transmitting beam of the PUSCH channel resource in a preset time interval, the user terminal switches the transmitting beam and the receiving beam based on the instruction of the base station, and performs PUSCH resource scheduling on the user terminal in the next preset time interval.
Further optionally, the preset time interval is a basic information transmission unit in the NR system.
According to another aspect of the present invention, a user terminal includes: a beam management module, configured to receive an SRS resource configured by an RRC periodically or non-periodically, perform an uplink beam management process by periodically or non-periodically transmitting an SRS uplink beam scanning signal, and receive a transmission beam and a reception beam determined by a base station for a PUSCH channel resource and a PUCCH channel resource; an optimal receiving beam determining module, configured to determine an optimal receiving beam by scanning a synchronization block SSB sent by a PDCCH channel resource or scanning an aperiodic downlink measurement pilot CSI-RS receiving beam; the non-competitive random access initiating module is used for judging whether a non-competitive random access triggering condition is met or not after the uplink resource scheduling request SR is triggered; if the non-competitive random access triggering condition is met, initiating a non-competitive random access request; before completing the non-competitive random access request, if a preset non-competitive random access cancellation condition is met, canceling the non-competitive random access request, and not entering a non-competitive random access process, wherein the preset non-competitive random access cancellation condition at least comprises: detecting valid PUCCH channel resources; and the transmission module is used for judging whether the preset parameter of the PUCCH channel resource configuration meets a first preset condition or not when the non-competitive random access triggering condition is not met, and if the preset parameter of the PUCCH channel resource configuration meets the first preset condition, effectively performing the operation of transmitting the uplink resource scheduling request SR to the base station.
According to another aspect of the present invention, a communication network system includes at least one base station as described above and a user terminal as described above.
The invention has the beneficial effects that:
by introducing a beam management mode and a non-competitive random access process, the reliability of the SR request process is enhanced, the transmission delay of uplink services is reduced, the interference among uplink signals in the system is reduced, and the transmission quality of uplink PUCCH signals, PUSCH signals and downlink signals is improved.
Drawings
Fig. 1 shows a flow chart of a scheduling request processing method for 5G NR of the present invention;
fig. 2 shows a flowchart of triggering an uplink resource scheduling request SR according to the present invention.
Detailed Description
The contents of the present invention will now be discussed with reference to several exemplary embodiments. It is to be understood that these examples are discussed only to enable those of ordinary skill in the art to better understand and thus implement the teachings of the present invention, and are not meant to imply any limitations on the scope of the invention.
As used herein, the term "include" and its variants are to be read as open-ended terms meaning "including, but not limited to. The term "based on" is to be read as "based, at least in part, on. The terms "one embodiment" and "an embodiment" are to be read as "at least one embodiment". The term "another embodiment" is to be read as "at least one other embodiment".
Example 1
Fig. 1 of this embodiment shows a scheduling request processing method for 5G NR, which mainly includes the following steps:
step 101, triggering an uplink resource scheduling request SR;
step 102, after triggering an uplink resource scheduling request SR, judging whether a non-competitive random access triggering condition is met;
103, if a non-competitive random access triggering condition is met, initiating a non-competitive random access request; before the non-competitive random access request is finished, judging whether a preset non-competitive random access cancellation condition is met;
step 104, if yes, canceling the non-contention random access request, and not entering the non-contention random access process, wherein the preset non-contention random access cancellation condition at least includes: detecting valid PUCCH channel resources;
step 105, if not, judging whether the preset parameters of the PUCCH channel resource allocation meet first preset conditions;
step 106, if yes, the operation that the uplink resource scheduling request SR is transmitted to the base station is effectively carried out; if not, determining that the non-competitive random access triggering condition is met and the non-competitive random access canceling condition is not met, and entering a non-competitive random access process.
By introducing a beam management mode and a non-competitive random access process, the reliability of the SR request process is enhanced, the transmission delay of uplink service is reduced, the interference between uplink signals in the system is reduced, and the transmission quality of uplink PUCCH signals, PUSCH signals and downlink signals is improved.
Example 2
Fig. 1 shows a scheduling request processing method for 5G NR according to this embodiment, which mainly includes the following steps:
step 201, configuring periodic or aperiodic SRS resource by RRC, performing uplink beam management process by periodically or aperiodically transmitting SRS uplink beam scanning signal, determining transmission beam and reception beam of PUSCH channel resource and PUCCH channel resource by base station, and notifying user terminal of the result of transmission beam and reception beam selection.
Step 202, scanning a synchronization block SSB sent by a downlink PDCCH channel resource or scanning an aperiodic downlink measurement pilot CSI-RS receive beam to determine an optimal receive beam, and determining an optimal transmit beam of the PUCCH channel resource through the optimal receive beam.
Step 203, triggering the uplink resource scheduling request SR.
Step 204, after triggering the uplink resource scheduling request SR, judging whether a non-competitive random access triggering condition is met;
step 205, if the non-competitive random access triggering condition is met, initiating a non-competitive random access request;
step 2051, before completing the non-contention random access request, if the preset non-contention random access cancellation condition is met, canceling the non-contention random access request, and not entering a non-contention random access process, where the preset non-contention random access cancellation condition includes:
receiving a UL-grant allocated by a base station on a PDCCH, and not sending acknowledgement cancellation information in the non-contention random access process to the base station; or monitoring that the uplink resource scheduling request SR has configured effective PUCCH resources and does not send acknowledgement cancellation information in the non-contention random access process to the base station.
Step 206, if the non-competitive random access triggering condition is not satisfied, judging whether a preset parameter of the PUCCH channel resource configuration satisfies a first preset condition;
the preset parameters of the PUCCH channel resource allocation comprise an SR prohibiting timer, the SR maximum transmission times, an SR counter, an SR beam management threshold and the like. The first preset condition is that whether the SR prohibit timer is in operation at this time in the parameter for determining the uplink resource scheduling request SR configuration.
Step 2061, if yes, the operation of transmitting the uplink resource scheduling request SR to the base station is effectively carried out;
step 2062, if not, determining that the non-competitive random access triggering condition is met, and the non-competitive random access canceling condition is not met, and entering the non-competitive random access process.
Example 3
Fig. 2 shows a communication network system of the present embodiment, which includes at least one base station and at least one user terminal. The base station includes:
a transmitting module configured to transmit an RRC message to a user terminal, the RRC message comprising a transmit beam and a receive beam indicating PUSCH channel resources and PUCCH channel resources; the transmitting module configures one or more PUSCH (physical uplink shared channel) resources or one or more PUCCH (physical uplink control channel) resources for the user terminal;
the receiving module executes an SR request if the receiving module detects an effective uplink resource scheduling request SR in PUCCH channel resources;
and if the receiving module detects an effective uplink resource scheduling request SR in the non-competitive random access resource, the receiving module instructs the user terminal to re-determine the optimal transmitting beam of the PUSCH channel resource in a preset time interval, the user terminal switches the transmitting beam and the receiving beam based on the instruction of the base station, and performs PUSCH resource scheduling on the user terminal in the next preset time interval.
The preset time interval in the system shown in this embodiment is a basic information transmission unit in the NR system.
The user terminal includes:
a beam management module, configured to receive an SRS resource configured by an RRC periodically or non-periodically, perform an uplink beam management process by periodically or non-periodically transmitting an SRS uplink beam scanning signal, and receive a transmission beam and a reception beam determined by a base station for a PUSCH channel resource and a PUCCH channel resource;
an optimal receiving beam determining module, configured to determine an optimal receiving beam by scanning a synchronization block SSB sent by a PDCCH channel resource or scanning an aperiodic downlink measurement pilot CSI-RS receiving beam;
a non-competitive random access initiating module, which is used for judging whether a non-competitive random access triggering condition is satisfied after the uplink resource scheduling request SR is sent; if the non-competitive random access triggering condition is met, initiating a non-competitive random access request; before the non-contention random access request is completed, if the preset non-contention random access cancellation condition is met, canceling the non-contention random access request, and not entering a non-contention random access process, wherein the preset non-contention random access cancellation condition at least comprises: detecting valid PUCCH channel resources;
and the transmission module is used for judging whether the preset parameter of the PUCCH channel resource configuration meets a first preset condition or not when the non-competitive random access triggering condition is not met, and if the preset parameter of the PUCCH channel resource configuration meets the first preset condition, effectively performing the operation of transmitting the uplink resource scheduling request SR to the base station.
Example 4
The embodiment provides a scheduling request processing method for 5G NR, and the test in the 5G millimeter wave radio frequency technology is actually the biggest difficulty of the millimeter wave radio frequency technology. Therefore, the radio frequency hardware devices usually have defects, and especially, the consistency of the transmitting and receiving circuits is difficult to achieve, so that the application scenes cannot be guaranteed to have the characteristics corresponding to the beams.
In this scenario, the UE needs to configure periodic or aperiodic SRS resources by RRC, then perform an uplink beam management process by periodically or aperiodically transmitting SRS uplink beam scanning signals, determine a transmission beam and a reception beam of a physical uplink control channel PUCCH and a physical uplink shared channel PUSCH by the base station, and notify the UE of a result of beam selection by an MAC layer control element CE.
For a scene with unreliable SR caused by movement or shielding and the like, the problem of signal quality reduction will also occur when downlink beams are transmitted, and beam switching and reselection need to be performed through a beam management process. Beam scanning using aperiodic measurement pilots is an optimal choice considering the delay.
The PUCCH channel beam is typically beam selected and enabled for the UE by the base station through the MAC layer. It is considered that the UE can confirm the beam used by the PUCCH channel carrying the SR through a failure process of SR transmission requests continuously for a plurality of times, which requires a beam management process. Then the use of the MAC layer for beam selection and enabled notification may cause greater control delay. In this case, the system preferably uses physical layer signaling to perform beam selection and enable notification on the PUCCH channel beam.
When the UE is in an RRC connection state, the UE finds out that the beam used by the PUCCH carrying the SR needs to perform an uplink and downlink beam management process nearly quickly through a plurality of SR transmission request failure processes. At this time, the UE only selects an appropriate resource from a non-contention random access signal resource pool configured by RRC in advance, and transmits a non-contention random access request signal to the base station, requesting the base station to perform a process of uplink and downlink beam joint management.
These resources are in predefined settings, signal request resources dedicated to UE request beam management set up for such SR multiple failures.
The present embodiment proposes a modified SR uplink resource scheduling request scheme and flow:
(1) If the user does not use the high frequency band service cell user or the user uses the high frequency band service cell user and the user beam has a corresponding relation, the original SR uplink scheduling request process is used;
(2) If the user is a user using a high-frequency-band serving cell and the user beam does not have a beam corresponding relation, the user uses the process of the SR uplink resource scheduling request defined by the invention, and the process is as follows:
when a Scheduling Request (SR) is waiting to be sent, the MAC entity carries out the following processing on the waiting SR:
1) If the MAC entity does not have a configured valid PUCCH resource for this pending request: then, the MAC entity initiates a contention access procedure in the serving cell to perform an uplink resource scheduling request, and cancels the request;
otherwise, if the MAC entity has configured valid PUCCH resources for this pending request: the MAC entity has established a configuration for the pending request, with the following parameters: an SR prohibit timer, SR maximum transmission times, an SR counter, an SR beam management threshold (smaller than the SR maximum transmission times), PUCCH resources configured for each bandwidth subset (BWP), non-contention random access resources, non-periodic downlink measurement pilot resources and non-periodic SRS resources;
A. when the MAC entity has valid PUCCH resources and non-contention access resources for the waiting request at the SR transmission time, if the SR prohibit timer is not running at this time, and the PUCCH resources/non-contention access resources do not overlap with the measurement window, and the PUCCH resources/non-contention access resources do not overlap with other uplink shared resources, then it is considered that the SR transmission should be performed efficiently:
an SR transmission process:
if the SR counter does not reach the SR beam management threshold,
instructing the physical layer to send an SR request on this valid PUCCH resource;
the SR counter is increased by 1;
starting an SR prohibiting timer;
otherwise, if the SR counter has not reached the SR maximum number of transmissions,
instructing a physical layer to send an SR request in an effective non-competitive access resource;
adding 1 to the SR timer;
starting an SR prohibiting timer;
otherwise, the MAC entity informs the RRC connection state management center to release PUCCH resources, non-competitive access resources and SRS resources of all the serving cells; the MAC entity clears all downlink resource allocation and uplink resource allocation; the MAC entity clears any PUSCH resource used for reporting the channel state; the MAC entity finally sends 1 contention access procedure in the serving cell and clears all waiting SR requests.
The base station side operation mode comprises the following steps:
if the base station detects an effective SR request signal in the corresponding effective PUCCH resource of the UE, the base station processes according to the existing mode and flow; if the base station detects the SR request signal sent by the UE on the effective non-competitive access resource corresponding to the UE, the base station knows that the UE can not continuously receive the SR request because the beam quality is reduced, the base station indicates the UE through a physical layer and then determines the delay time to respectively carry out the downlink beam scanning process on the downlink measurement pilot frequency sent by the base station at the later time, and sends the aperiodic SRS resource to the base station at the other time to carry out the uplink beam scanning process; after the uplink and downlink beam management process is finished, the base station indicates the UE to switch and enable the uplink and downlink beams through a physical layer; and finally, the base station performs normal PUSCH resource scheduling on the UE according to the SR request of the UE.
One specific example includes:
an operator creates 1 gNB (base station of 71 GHz) in a crowded place of people due to the rapid increase of business requirements, the base station constructs 1 independent service cell, and a 256-array element large-scale MIMO antenna array is adopted.
The existing user A uses the UE terminal working at 71 GHz/16-array element antenna to access the hot cell, continuously performs on-network service all the time, and suddenly prepares to upload a large number of pictures.
The serving cell configures an SR resource for the UE of the user a, the maximum transmission time of the SR resource configuration is 32, the prohibit timer is 10 milliseconds, the SR counter and the SR beam management threshold are 8 times, and the SR resource configuration corresponds to the configuration of the PUCCH resource and the non-contention random access PRACH resource on the BWP of the 71GHz cell.
The uploading task of the user A is that temporary uplink and downlink wave beams are misaligned due to the blocking of people flow and the adjustment of the UE direction of the user A, particularly, the pointing of the uplink wave beams is wrong, continuous SR requests fail, when an SR counter reaches an SR wave beam management threshold, the UE of the user A uses a non-competitive access resource PRACH resource to initiate a request, a base station successfully receives the request, and a management process that one-time non-periodic measurement pilot frequency CSI-RS and one-time non-periodic SRS are used for executing one-time combined uplink and downlink wave beam scanning is triggered through a physical layer command. After the beam management process is completed, the base station immediately performs subsequent PUSCH resource scheduling on the user. And then, on the application level, the picture uploading of the user is successfully responded, and the picture uploading is successfully completed.
It should be understood that the order of execution of the steps in the summary of the invention and the embodiments of the present invention does not absolutely imply any order of execution, and the order of execution of the steps should be determined by their functions and inherent logic, and should not be construed as limiting the process of the embodiments of the present invention.
Claims (4)
1. A scheduling request processing method for 5G NR is characterized by comprising
Triggering an uplink resource Scheduling Request (SR);
after triggering the uplink resource scheduling request SR, judging whether a non-competitive random access triggering condition is met; if the non-competitive random access triggering condition is met, initiating a non-competitive random access request; before completing the non-competitive random access request, if a preset non-competitive random access cancellation condition is met, canceling the non-competitive random access request, and not entering a non-competitive random access process, wherein the preset non-competitive random access cancellation condition at least comprises the following steps: detecting valid PUCCH channel resources;
if the non-competitive random access triggering condition is not met, judging whether a preset parameter of the PUCCH channel resource configuration meets a first preset condition or not;
if so, the operation of transmitting the uplink resource scheduling request SR to the base station is effectively carried out; if not, determining that the non-competitive random access triggering condition is met and the non-competitive random access cancelling condition is not met, and entering a non-competitive random access process;
in the step of determining the transmitting beam and the receiving beam of the PUSCH channel resource and the PUCCH channel resource by the base station, the optimal transmitting beam of the PUCCH channel resource needs to be determined, and the determining method is as follows:
scanning a synchronization block SSB sent by a PDCCH channel resource or scanning an aperiodic downlink measurement pilot CSI-RS receiving beam to determine an optimal receiving beam, and determining an optimal transmitting beam of the PUCCH channel resource through the optimal receiving beam;
the preset non-contention random access cancellation condition comprises:
receiving a UL-grant allocated by a base station on a PDCCH, and not sending acknowledgement cancellation information in the non-contention random access process to the base station; or
Monitoring that the uplink resource scheduling request SR is configured with effective PUCCH resources and does not send acknowledgement cancellation information in the non-contention random access process to the base station;
the preset parameters of the PUCCH channel resource configuration comprise: the device comprises an SR prohibiting timer, an SR maximum transmission frequency, an SR counter and an SR beam management threshold;
the first preset condition includes:
judging whether an SR prohibit timer is in operation at the moment in the parameter configured by the uplink resource scheduling request SR; if not, determining that the first preset condition is met;
before the triggering of the uplink resource scheduling request SR, the method further includes:
configuring periodic or aperiodic SRS resources by RRC, carrying out an uplink beam management process by periodically or aperiodically transmitting SRS uplink beam scanning signals, determining a transmitting beam and a receiving beam of PUSCH (physical uplink shared channel) resources and PUCCH (physical uplink control channel) resources by a base station, and informing a user terminal of a result selected by the transmitting beam and the receiving beam;
if the base station detects an effective uplink resource scheduling request SR in the PUCCH channel resources, the base station executes the SR request; if the base station detects an uplink resource scheduling request SR request signal on the non-competitive access resource, the base station indicates the user terminal to re-determine the optimal transmitting beam of the PUSCH channel resource in a preset time interval through physical layer signaling, the user terminal switches the transmitting beam and the receiving beam based on the physical layer indication of the base station, and carries out PUSCH channel resource scheduling on the user terminal in the next preset time interval.
2. A base station, comprising:
a transmitting module configured to transmit an RRC message to a user terminal, the RRC message comprising a transmit beam and a receive beam indicating PUSCH channel resources and PUCCH channel resources; the transmitting module configures one or more PUSCH channel resources or one or more PUCCH channel resources for the user terminal;
the receiving module executes an SR request if the receiving module detects an effective uplink resource scheduling request SR in PUCCH channel resources;
if the receiving module detects an effective uplink resource scheduling request SR in a non-competitive random access resource, the receiving module instructs a user terminal to re-determine an optimal transmitting beam of PUSCH channel resources at a preset time interval, the user terminal switches the transmitting beam and the receiving beam based on the instruction of a base station, and performs PUSCH resource scheduling on the user terminal in the next preset time interval;
the preset time interval is a basic information transmission unit in the NR system;
triggering an uplink resource Scheduling Request (SR);
after triggering the uplink resource scheduling request SR, judging whether a non-competitive random access triggering condition is met; if the non-competitive random access triggering condition is met, initiating a non-competitive random access request; before completing the non-competitive random access request, if a preset non-competitive random access cancellation condition is met, canceling the non-competitive random access request, and not entering a non-competitive random access process, wherein the preset non-competitive random access cancellation condition at least comprises: detecting valid PUCCH channel resources;
if the non-competitive random access triggering condition is not met, judging whether a preset parameter of the PUCCH channel resource configuration meets a first preset condition or not;
if yes, the operation of transmitting the uplink resource scheduling request SR to the base station is effectively carried out; if not, determining that the non-competitive random access triggering condition is met and the non-competitive random access cancelling condition is not met, and entering a non-competitive random access process;
the base station instructs the user terminal to re-determine the optimal transmitting beam of the PUSCH channel resource at a preset time interval through physical layer signaling, and the user terminal switches the transmitting beam and the receiving beam based on the physical layer instruction of the base station.
3. A user terminal, comprising:
a beam management module, configured to receive an SRS resource configured by an RRC, periodically or aperiodically, perform an uplink beam management process by periodically or aperiodically transmitting an SRS uplink beam scanning signal, and receive a transmission beam and a reception beam determined by a base station for a PUSCH channel resource and a PUCCH channel resource;
an optimal receiving beam determining module, configured to determine an optimal receiving beam by scanning a synchronization block SSB sent by a PDCCH channel resource or scanning an aperiodic downlink measurement pilot CSI-RS receiving beam;
the non-competitive random access initiating module is used for judging whether a non-competitive random access triggering condition is met or not after the uplink resource scheduling request SR is triggered; if the non-competitive random access triggering condition is met, initiating a non-competitive random access request; before completing the non-competitive random access request, if a preset non-competitive random access cancellation condition is met, canceling the non-competitive random access request, and not entering a non-competitive random access process, wherein the preset non-competitive random access cancellation condition at least comprises: detecting valid PUCCH channel resources;
a transmission module, configured to determine whether a preset parameter of the PUCCH channel resource configuration satisfies a first preset condition when a non-contention random access trigger condition is not satisfied, and if the preset parameter satisfies the first preset condition, effectively perform an operation of transmitting the uplink resource scheduling request SR to the base station;
if the base station detects an effective uplink resource scheduling request SR in the PUCCH channel resource, the SR request is executed; if the base station detects an uplink resource scheduling request SR request signal on the non-competitive access resource, the base station indicates the user terminal to re-determine the optimal transmitting beam of the PUSCH channel resource in a preset time interval through physical layer signaling, the user terminal switches the transmitting beam and the receiving beam based on the physical layer indication of the base station, and carries out PUSCH channel resource scheduling on the user terminal in the next preset time interval.
4. A communication network system comprising at least one base station according to claim 2 and at least one user terminal according to claim 3.
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| CN116419410B (en) * | 2023-03-07 | 2023-11-24 | 江苏亨鑫无线技术有限公司 | Self-adaptive adjustment method for scheduling request period |
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| RU2737482C1 (en) * | 2017-11-20 | 2020-12-01 | Бейдзин Сяоми Мобайл Софтвэр Ко., Лтд. | Method and device for uplink transmission resource request |
| EP4132185A1 (en) * | 2018-03-30 | 2023-02-08 | ResMed, Inc. | Scheduling request based beam failure recovery |
| CN110839289B (en) * | 2018-08-17 | 2022-04-12 | 大唐移动通信设备有限公司 | Uplink beam indication method and device |
| CN110958042A (en) * | 2018-09-26 | 2020-04-03 | 索尼公司 | Network side device, user equipment, wireless communication method and storage medium |
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