CN109600860B

CN109600860B - Random access method, apparatus, device, storage medium and program product

Info

Publication number: CN109600860B
Application number: CN201711138282.1A
Authority: CN
Inventors: 李小仙; 方平; 程勇
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2017-09-30
Filing date: 2017-11-16
Publication date: 2023-02-14
Anticipated expiration: 2037-11-16
Also published as: CN109600860A

Abstract

The application provides a random access method, a device, equipment, a storage medium and a program product, wherein the method comprises the following steps: if the UE is not configured with the uplink resource for transmitting the SR, or the UE fails to SR, the UE performs random access using the random access configuration corresponding to the LCH with the highest priority, or using the random access configuration corresponding to the SR with the highest priority, or using the random access configuration capable of providing the highest QoS, so as to preferentially implement access transmission of a service with a high priority or a high QoS requirement, thereby optimizing transmission reliability.

Description

Random access method, apparatus, device, storage medium and program product

Technical Field

The present application relates to communications technologies, and in particular, to a random access method, apparatus, device, storage medium, and program product.

Background

The fifth generation (5 th generation,5 g) mobile communication technology (mobile communication technology) is an extension of the fourth generation (the 4generation,4 g) mobile communication technology. Therefore, the 5G communication system is called a "super 4G network" or a "Long Term Evolution (LTE) system after Long Term Evolution (Long Term Evolution)" or a "New Radio (NR)". In the existing LTE, when Scheduling Request (SR) failure occurs, user Equipment (UE) performs random access, which may specifically treat a process described in 3gpp TS 36.321, and the UE sends a random access preamble to a base station, receives a random access response returned by the base station, and obtains uplink synchronization according to the random access response to complete a random access process.

In NR, a UE may be configured with multiple Logical Channels (LCHs), and when data needs to be sent on a certain LCH, if the UE does not have available Physical Uplink Shared Channel (PUSCH) resources, the UE may be triggered to send an SR message on a time-frequency resource of an SR Configuration (SR Configuration) corresponding to the LCH. Each SR Configuration corresponds to a maximum number of transmissions drs-TransMax. The UE internally maintains a COUNTER SR _ COUNTER. When there is data on the LCH of the UE and there is no PUSCH resource in the current Time slot or Transmission Time Interval (TTI), the UE is triggered to generate a pending SR. If SR _ COUNTER is less than drs-TransMax, then SR _ COUNTER is added with 1 and SR is sent. Each time an SR or SR bundle is sent, SR _ COUNTER is incremented by 1. When SR _ COUNTER reaches drs-TransMax, the UE considers that SR failure occurs. Then, the UE performs Random Access, and in the current NR, the UE performs Random Access by using a Random Access Channel (RACH) configuration corresponding to the LCH that triggers the SR failure. Wherein the random access configuration comprises a backoff (backoff) parameter and/or a power ramping parameter for the UE to perform random access.

However, the RACH parameters corresponding to the LCH triggering SR failure for random access may not meet the requirements of services on other LCHs.

Disclosure of Invention

The application provides a random access method, a device, equipment, a storage medium and a program product, which are used for optimizing a scheme of random access of UE.

In a first aspect, the present application provides a random access method, which at least includes the following embodiments:

1. if the UE is not configured with uplink resources for transmitting the SR or the UE fails in the SR, the UE carries out random access by using first random access configuration;

wherein the first random access configuration is any one of: the random access configuration corresponding to the LCH with the highest priority in the first LCH set corresponding to the UE; or, the random access configuration capable of providing the highest QoS among the random access configurations associated with the first LCH set corresponding to the UE; or, a random access configuration corresponding to an SR configuration with the highest priority in a first SR configuration set corresponding to the UE; or, the random access configuration capable of providing the highest QoS among the random access configurations associated with the first SR configuration set corresponding to the UE;

the first LCH set comprises at least two LCHs which have uplink data to be sent in the LCHs of the UE; the first set of SR configurations includes at least one of SR configurations released by the UE upon occurrence of the SR failure.

2. The method of embodiment 1, wherein the UE has SR failure, comprising:

the SR counter in any SR configuration of the UE reaches the maximum number of times; or,

the SR counters in a plurality of SR configurations in the SR configuration of the UE reach the maximum number of times.

3. The method according to embodiment 1 or 2, the first random access configuration comprising power information and/or a backoff parameter.

4. According to the method of any of embodiments 1 to 3, the at least two LCHs having uplink data to be sent include:

LCH of SR is triggered in LCH of the UE; or,

the UE releases the SR configuration after the SR failure occurs, and has LCH to be sent by uplink data in the LCH corresponding to the SR configuration; or,

the UE triggers the LCH of the SR in the LCH corresponding to the SR configuration released after the SR failure occurs; or,

triggering the LCH corresponding to the SR configuration configured on the BWP of the cell/bandwidth segment where the SR configuration which has the SR failure occurs to have the LCH which needs to send the uplink data; or,

triggering the LCH triggering the SR in the LCH corresponding to the SR configuration configured on the cell/BWP where the SR failed is configured; or,

LCHs to be sent by uplink data exist in LCHs corresponding to SR configurations on all service cells of the UE; or,

LCHs triggering the SR in the LCHs corresponding to the SR configuration on all the service cells of the UE, or,

and triggering the LCH corresponding to the SR configuration with the SR failure to have the LCH to which the uplink data needs to be sent.

In this scheme, if the UE has SR failure, it should be understood that the first LCH set includes LCH channels that trigger SR failure.

5. The method according to any of embodiments 1 to 4, wherein the SR configuration released by the UE after the SR failure occurs comprises:

all SR configurations of the UE; or,

the SR configuration of the SR is triggered; or,

SR configuration of data to be transmitted; or,

triggering SR configuration of the SR failure; or,

SR configuration of the failure of the scheduling request;

and triggering the SR configuration configured on the cell/BWP where the SR configuration with the failed scheduling request is located.

6. The method of embodiment 3, wherein the UE performs random access according to the first random access configuration, comprising:

the UE sends a random access preamble to network equipment by using power information and/or backoff parameters; wherein the power information comprises a transmission power climbing step and/or initial transmission power used by the UE when retransmitting the random access preamble, and the backoff parameter comprises a backoff time zone for retransmitting the random access preamble after the UE receives RAR in the random access process.

In a second aspect, the present application further provides a User Equipment (UE), including at least the following embodiments:

7. a UE, comprising: a storage module for storing computer instructions; and a processing module for invoking computer instructions stored in the memory to cause the user equipment to perform the following operations:

if the UE is not configured with uplink resources for sending a Scheduling Request (SR), or the UE fails in SR, the UE performs random access by using first random access configuration;

wherein the first random access is configured as any one of: the random access configuration corresponding to the LCH with the highest priority in the first LCH set corresponding to the UE; or, the random access configuration capable of providing the highest QoS among the random access configurations associated with the first LCH set corresponding to the UE; or, a random access configuration corresponding to an SR configuration with the highest priority in a first SR configuration set corresponding to the UE; or, the UE is capable of providing the random access configuration with the highest QoS among the random access configurations associated with the first SR configuration set corresponding to the UE;

the first LCH set comprises at least two LCHs which have uplink data to be sent in the LCHs of the UE; the first set of SR configurations includes at least one of SR configurations that the UE releases upon occurrence of the SR failure.

8. The UE of embodiment 7, wherein the UE has SR failure, comprising:

the SR counter in any SR configuration in the SR configuration of the UE reaches the maximum number of times; or,

9. The UE according to embodiment 7 or 8, wherein the first random access configuration comprises power information and/or a backoff parameter.

10. According to the UE in any one of embodiments 7 to 9, the at least two LCHs with uplink data to be sent include:

LCH of SR is triggered in LCH of the UE; or,

triggering the LCH corresponding to the SR configuration configured on the cell/bandwidth segment BWP where the SR configuration failed is located to have the LCH needing to send uplink data; or,

11. The UE according to any of embodiments 7 to 10, wherein the SR configuration released by the UE after the SR failure occurs comprises:

all SR configurations of the UE; or,

the SR configuration of the SR is triggered; or,

SR configuration of data to be transmitted; or,

triggering an SR configuration in which the SR failure occurs; or,

SR configuration of the failure of the scheduling request;

and triggering the SR configuration configured on the cell/BWP where the SR configuration of the scheduling request failure occurs.

12. The UE according to embodiment 9, wherein the UE performs random access according to the first random access configuration, including:

In a third aspect, the present application further provides a User Equipment (UE), which at least includes the following embodiments:

13. a UE, comprising: a memory for storing computer instructions; and a processor for invoking computer instructions stored in the memory to cause the user equipment to perform the following operations:

if the UE is not configured with uplink resources for sending a Scheduling Request (SR), or the UE fails in SR, the processor performs random access by using a first random access configuration;

wherein the first random access is configured as any one of: the random access configuration corresponding to the LCH with the highest priority in the first LCH set corresponding to the UE; or, the random access configuration capable of providing the highest QoS among the random access configurations associated with the first LCH set corresponding to the UE; or, a random access configuration corresponding to an SR configuration with the highest priority in a first SR configuration set corresponding to the UE; or, the random access configuration capable of providing the highest QoS among the random access configurations associated with the first SR configuration set corresponding to the UE;

14. The UE of embodiment 13, wherein the UE has an SR failure, comprising:

15. The UE according to embodiment 13 or 14, wherein the first random access configuration comprises power information and/or a backoff parameter.

16. According to the UE in any one of embodiments 13 to 15, the at least two LCHs with uplink data to be sent include:

LCH of SR is triggered in LCH of the UE; or,

17. The UE according to any of embodiments 13 to 16, wherein the SR configuration released by the UE after the SR failure occurs comprises:

all SR configurations of the UE; or,

the SR configuration of the SR is triggered; or,

SR configuration of data to be transmitted; or,

triggering an SR configuration in which the SR failure occurs; or,

SR configuration of the failure of the scheduling request;

18. The UE according to embodiment 15, wherein the UE performs random access according to the first random access configuration, comprising:

On the basis of the UE provided in any of the above embodiments, the UE may further include a transceiver for receiving and transmitting data.

In the above UE specific implementation, the number of the processors is at least one, and the processors are configured to execute computer instructions, that is, computer programs, stored in the memory, so that the user equipment performs the random access method provided in any embodiment of the first aspect, and optionally, the memory may also be integrated inside the processors.

In a fourth aspect, the present application further provides a chip, including: a processing module (which may be one or more, and specifically may be a processor) configured to perform the random access method according to any one of embodiments 1 to 6 of the first aspect, and a communication interface configured to communicate with other devices under the control of the processing module. Memory for storing instructions and/or data may be integrated within the chip for retrieval by the processing module. The Chip may be a System-on-a-Chip (SoC), which may be referred to as a System-on-Chip or a System-on-Chip.

In a fifth aspect, the present application also provides a readable storage medium having stored thereon a computer program which, when executed on a computer, will cause the computer to perform the random access method according to any one of embodiments 1 to 6 of the first aspect.

In a sixth aspect, the present application further provides a program product, which includes a computer program, the computer program being stored in a readable storage medium, from which at least one processor of the user equipment reads and executes the computer program, so that the user equipment performs the random access method according to any one of embodiments 1 to 6 of the first aspect.

According to the random access method, device, equipment, storage medium and program product provided by the application, when the UE is not configured with the uplink resource for sending the SR or the UE fails in the SR, the UE uses the random access configuration corresponding to the LCH with the highest priority, or uses the random access configuration corresponding to the SR with the highest priority, or uses the random access configuration capable of providing the highest QoS to perform random access, so that the UE can preferentially realize access transmission of services with high priority or high QoS requirements, and the reliability of service transmission is optimized.

Drawings

FIG. 1 is a schematic diagram of an NR system architecture;

fig. 2 is a schematic diagram illustrating a UE performing random access when a scheduling request fails;

fig. 3 is a schematic structural diagram of a first embodiment of a user equipment provided in the present application;

fig. 4 is a schematic structural diagram of a second embodiment of a user equipment provided in the present application.

Detailed Description

The internal Protocol stack of the UE includes a Radio Resource Control (RRC) layer, a Packet Data Convergence Protocol (PDCP) layer, a Radio Link Control (RLC) layer, a Medium Access Control (MAC) layer, and a Physical (PHY) layer, and may further include a Service Data Access Protocol (SDAP) layer on the PDCP layer. The UE may be configured with multiple LCHs, and when data needs to be sent on a certain LCH, if the UE does not have available Physical Uplink Shared Channel (PUSCH) resources, the UE may be triggered to send the SR message on the time-frequency resources of the SR Configuration corresponding to the LCH. In the existing LTE, if the UE sends an SR message to the maximum transmission times drs-TransMax and uplink transmission resources are not allocated yet, it is considered that a scheduling request failure SR failure occurs, and further, when the scheduling request failure SR failure occurs, the UE releases all PUCCH resources and performs random access, and the specific process may refer to the process described in 3gpp TS 36.321.

In NR, the UE may be configured with multiple SR configurations, one for each maximum number of transmissions, e.g., drs-TransMax. The UE configures a COUNTER for each SR Configuration, denoted as SR _ COUNTER. When there is data to be sent on the LCH of the UE and there is no PUSCH resource in the current Time slot or Transmission Time Interval (TTI), the UE is triggered to generate a pending SR. When an SR _ COUNTER corresponding to one or more SR configurations reaches a drs-TransMax corresponding to the SR Configuration, the UE considers that SR failure occurs. Uplink data in one or more LCHs of the UE need to be sent to the base station, but the UE is not allocated with PUSCH resources for transmitting data to send the data, and the UE needs to request the PUSCH resources from the base station. Under the condition that the UE is not configured with uplink resources for transmitting the scheduling request SR, the UE can only request PUSCH resources from the base station by initiating a random access manner (i.e., transmitting a random access preamble). In the above SR failure or when the UE is not configured with the uplink resource for transmitting the scheduling request SR, the UE performs random access, and in the prior art, it is proposed to perform random access using a random access configuration corresponding to the LCH that triggers the SR failure. However, if there is data on an LCH with a higher priority or service data with a higher QoS requirement is to be transmitted, then the QoS requirement of the LCH with a higher priority may not be satisfied by directly adopting the random access configuration corresponding to the LCH triggering SR failure to perform random access. Therefore, the scheme provides an optimized random access scheme, when the UE has SR failure, the UE can complete random access as soon as possible, the transmission of service data with higher priority LCH or high QoS requirement is preferentially met, and the service reliability is ensured.

The method and the device can be applied to Wireless communication systems, such as New Radio (NR) scenes, LTE next generation scenes, wireless Local Area Network (WLAN) scenes, bluetooth communication, 3 GPP-defined communication systems, and the like. For convenience of description, the embodiment takes a new air interface scenario as an example for explanation. Fig. 1 is a schematic diagram of an NR system architecture, as shown in fig. 1, in an NR scenario, a core network, such as an NGC/5GC or an EPC, and an access network of a new air interface may be included, and for convenience of description, the core network and the access network are collectively referred to in the specification. The functional entities are mainly network devices and user equipment connected to the network devices in the new air interface access network, such as user equipment 1 shown in fig. 1, and may further include relay devices and user equipment connected to the relays, such as user equipment 2 shown in fig. 1. The relay device establishes a connection with the network device through the link 2, and thus, the relay device can also be regarded as a user equipment with respect to the network device; the relay device establishes a connection with the user equipment 2 via the link 3, and thus the relay device can also be considered as a kind of network device with respect to the user equipment. Therefore, those skilled in the art can understand that the network device described in the present application may also include a relay device, and the user equipment described in the present application may also include a relay device. The network device may specifically be any one or a combination of several of a gNB, a New radio base station (New radio eNB), a transmission point (TRP), a macro base station, a micro base station, a high frequency base station, an LTE macro or micro eNB, customer Premises Equipment (CPE), a WLAN AP, and a WLAN GO, for example, the network device may be a gNB, and the gNB completes a function related to the network device in the present application, or the network device is a combination of the gNB and the TRP, for example, the gNB completes a resource configuration function of the network device in the present application, and the TRP completes a sending and receiving function of the network device in the present application, which is not limited herein. The user equipment may be a mobile phone, a tablet, a smart car, a sensing device, an Internet Of Things (IOT) device, a CPE, a relay base station, a UE, an NR-UNIT, etc.

Taking the system architecture diagram shown in fig. 1 as an example, the random access method provided in the present application is described, in this scheme, if the UE is not configured with the uplink resource for sending the scheduling request SR or the UE fails to make the scheduling request, the UE performs random access using a first random access configuration;

wherein the first random access is configured as any one of: the random access configuration corresponding to the LCH with the highest priority in the first LCH set corresponding to the UE; or, the UE is configured to provide a random access configuration with a highest Quality of Service (QoS) among the random access configurations associated with the first LCH set; or, a random access configuration corresponding to an SR configuration with the highest priority in a first SR configuration set corresponding to the UE; or, the random access configuration that can provide the highest QoS among the random access configurations associated with the first SR configuration set corresponding to the UE. In this scenario, it should be understood that the first LCH set corresponding to the UE includes an LCH set owned by the UE internally, or an LCH set configured for the UE, or an LCH set associated with the UE. Similarly, the first SR configuration set corresponding to the UE also includes an SR configuration set owned by the UE, or an SR configuration set configured for the UE, or an SR configuration set associated with the UE. This solution is not limited.

The first LCH set comprises at least two LCHs which have uplink data to be sent in the LCHs of the UE; the first set of SR configurations includes at least one of SR configurations released by the UE upon occurrence of the SR failure. In the scheme, the method comprises the following steps of,

in this scheme, it should be understood that the case where the UE fails to perform the scheduling request includes: when the scheduling request of the UE fails, or after the scheduling request of the UE fails, the present solution is not limited.

The scheduling request counter may be configured for each LCH, or may be configured for each SR configuration, and in any configuration, when the count value of any one or more (or all) scheduling request counters associated with the UE reaches a preset maximum value, it is determined that the UE fails to send an SR.

At least four implementation modes are provided in the scheme:

in a first implementation manner, when the UE is not configured with uplink resources for transmitting a scheduling request SR or the UE determines that an SR failure occurs for random access, the selected first random access configuration is a random access configuration corresponding to an LCH with the highest priority among a plurality of LCHs configured by the UE and having data to be transmitted. The data to be sent may be uplink data to be sent, or a BSR to be sent, or buffer data in a buffer corresponding to the MAC layer. That is, the UE selects the random access configuration corresponding to the LCH with the higher priority according to the priority of the LCH to perform random access, that is, the UE preferentially ensures the service of the logical channel with the higher priority, thereby ensuring the reliability of the service.

For a UE, multiple LCHs may be configured, each of which may be used for different services. Each LCH can configure a corresponding random access configuration, which indicates RACH parameters, such as backoff parameters, power ramping parameters, etc., used when requesting uplink resources for random access to the LCH.

In a second implementation manner, when the UE is not configured with uplink resources for transmitting the scheduling request SR or the UE determines that an SR failure occurs for random access, the selected first random access configuration is a random access configuration capable of providing the highest QoS in RACHs associated with multiple LCHs configured by the UE and having data to be transmitted. That is, the UE determines which random access configuration is selected for random access according to the QoS that can be provided by all RACHs associated with the LCH for data transmission, and in this scheme, the random access configuration that can provide the highest QoS is selected for random access, that is, the reliability of the service with the highest QoS requirement is preferentially ensured.

In a third implementation manner, when the UE is not configured with uplink resources for transmitting a scheduling request SR or the UE determines that an SR failure occurs for random access, the selected first random access configuration is configured as a random access configuration corresponding to an SR configuration with the highest priority among SR configurations released after the SR failure occurs to the UE.

In this scheme, the random access configuration corresponds to an SR configuration, and for multiple LCHs of the UE, each LCH may correspond to 0 or 1 SR configuration. And configuring a corresponding random access configuration for each SR, so that the UE selects the random access configuration corresponding to the SR configuration with the highest priority for random access in the implementation mode, preferentially ensures service transmission of the SR configuration with the highest priority, and ensures the reliability of the service.

It should be understood that the granularity of the random access configuration may be one-to-one corresponding to LCH or one-to-one corresponding to SR configuration.

In a fourth implementation manner, when the UE is not configured with uplink resources for transmitting a scheduling request SR or the UE determines that an SR failure occurs for random access, the selected first random access configuration is configured as a random access configuration corresponding to an SR configuration that provides the highest QoS among SR configurations released after the SR failure occurs to the UE. And selecting the random access configuration capable of providing the highest QoS for random access, namely preferentially ensuring the reliability of the service with the highest service quality requirement.

In the random access method provided in the foregoing embodiment, if the UE is not configured with the uplink resource for sending the scheduling request SR or the UE fails in the scheduling request, the random access is triggered, and the UE selects an appropriate random access configuration according to the foregoing scheme to perform random access, so that the random access can be completed as soon as possible, and the requirements of the LCH with the highest priority or the highest QoS can be preferentially met, thereby ensuring reliability of the service.

Based on the above scheme, it can be understood that the UE may be configured with multiple SR configurations (SR configurations) and multiple LCHs. Specifically, the network device, such as the gNB, the cell, the Transmission Point and The Receiving Point (TRP), may indicate Configuration Information of each SR Configuration and LCH to the UE through an RRC message, a MAC CE, or Physical Downlink Control Channel (PDCCH) Downlink Control Information (DCI), and the like, and the Configuration Information of the SR Configuration may include one or more of a PUCCH time-frequency resource of a certain SR Configuration, a drs _ max _ nsmax of the SR Configuration, an SR _ prohibitter timer, a number corresponding to the SR Configuration, a TTI duration, and the like, and further, the network device may configure a priority of the SR Configuration, a random access Configuration associated with the SR Configuration (also referred to as random access Configuration Information, configuration, and the like, and the scheme is not limited thereto). The Random access configuration may be configuration parameters used when performing Random access after SR failure, for example, backoff parameters, power information, and the like, specifically, the backoff parameters may include a backoff time segment for retransmitting a Preamble after the UE receives a Random Access Response (RAR) in a Random access procedure, and the power information may include a transmit power ramp step (powerramping step) and/or initial transmission power used when the UE retransmits the Preamble.

Further, the random access configuration may further include one or more of a time-frequency resource used when performing random access, a maximum number of Preamble transmission times, a Preamble format or a long short message, a contention resolution timer, and the like. The configuration parameters in the random access configuration may be indicated in the same message, or may be indicated by multiple messages, for example, each parameter in the random access configuration may be carried in the same RRC message, or in a MAC CE, or in a PDCCH DCI manner, or may be carried in a combination of two or more of RRC signaling, or in a MAC CE, or in a PDCCH DCI manner. For example, the power information may be indicated by RRC signaling, and the backoff parameter may be indicated by RAR carried by the MAC CE. The configuration parameters included in the foregoing random access configuration may be indicated explicitly or implicitly. The random access configuration may be carried by a configuration index, or may be carried by direct description, or may be carried by configuration level indication, or may be carried by priority indication, or may be carried by a combination of two or more of the foregoing manners. For example, by corresponding the configuration index value to a specific configuration parameter, the network device only carries the corresponding configuration index value when indicating the random access configuration to the UE, and the UE determines the configuration parameter in the specific random access configuration through the configuration index value; or, the Configuration level or the priority indication corresponds to a specific Configuration parameter, and the UE may determine the Configuration parameter in the specific random access Configuration through the Configuration level or the priority indication configured to the UE by the network device, for example, when the SR Configuration is configured with a certain priority, after receiving the RAR, the UE may determine the backoff parameter corresponding to the SR Configuration by combining a backoff indicator indicated in the RAR and its own priority.

The configuration information of the LCH may include one or more of a priority of the LCH, service information corresponding to the LCH, and the like, and further, the network device may further configure a random access parameter associated with the LCH, and the configuration parameter specifically included in the random access parameter refers to the foregoing description. For example, when an LCH is configured with a certain priority, after the LCH receives the RAR, the backoff parameter corresponding to the LCH may be determined by combining the backoff indicator indicated in the RAR and its own priority.

One LCH can map to 0 or 1 or more SR configurations, i.e. one SR Configuration can correspond to one or more LCHs. For example, in a single carrier scenario, one LCH can be mapped into 0 or 1 SR configurations.

In a Carrier Aggregation (CA) scenario, an LCH may be mapped to SR configurations on multiple cells, which may be referred to as an SR Configuration set or SR Configuration Group on the multiple cells of the LCH, and the SR Configuration Group may be configured with the same drs _ TransMax. An SR _ COUNTER may be maintained for the SR Configuration Group. The UE is in SR Configuration. Sending an SR on any SR Configuration within the Group will increment SR _ COUNTER by 1. Therefore, the network device may further indicate, to the UE, a mapping relationship between the LCH and the SR Configuration, specifically, the mapping relationship may be carried in Configuration information of the SR Configuration or Configuration information of the LCH, or carried by other Configuration information, and the mapping relationship may be indicated by one or more of methods such as RRC signaling, MAC CE, DCI, and the like, which is not limited in this application.

The SR Configuration and the LCH Configuration information may be explicitly or implicitly indicated, and may be carried in the same RRC message, MAC CE, PDCCH DCI, or the like, or may be carried in a combination of two or more of RRC signaling, MAC CE, PDCCH DCI, or the like. For example, in some cases, there may be a certain association between the partial Configuration information of the LCH and the partial Configuration information of the SR Configuration, for example, the priority of the SR Configuration may be determined by the priority of its corresponding LCH, for example, the priority of the SR Configuration may be determined by the highest priority of its corresponding LCH, or the priority of the SR Configuration may be determined by the highest priority of its corresponding LCH that currently has data, so the network may not explicitly configure the priority of the SR Configuration to it, which is implicitly indicated by the priority of its corresponding LCH.

When the UE has uplink data to send on a certain LCH, if there is no available uplink transmission resource, such as a PUSCH resource, in the current transmission slot, the SR may be triggered, and the SR is sent on the PUCCH resource of the SR Configuration corresponding to the LCH, where the current transmission slot may be one of TTI, slot, mini slot, frame, subframe, and the like. Specifically, when data is to be sent on a certain LCH, generating a BSR may be triggered, where the type of the BSR may be one or more of a regular BSR, a padding BSR, a Periodic BSR, and the like, and when the UE determines that a local channel SR-ProhibitTimer is not running and the BSR has no uplink grant, the SR is triggered. In the specific embodiment, it should be understood that the descriptions of the data to be transmitted, the uplink data to be transmitted, the data to be sent, and the like in the text are all the same, and may be the cases that the uplink data is to be sent, or the BSR is to be sent, or the buffer data is in the buffer corresponding to the MAC layer.

In a first possible implementation manner, the LCH triggering the SR may be the LCH of the data to be transmitted first on the SR Configuration corresponding to the LCH, for example, at time t0, the LCH corresponding to the SR Configuration has no data to be transmitted, at time t1, the LCH corresponding to the SR Configuration has the first LCH to be transmitted, the LCH triggers the SR, and the PUCCH resource of the SR Configuration is used for transmission.

In a second possible implementation, the LCH triggering the SR may be an LCH with the highest priority of data to be transmitted in the LCHs corresponding to the SR Configuration corresponding to the LCH, for example, at time t0, none of the LCHs corresponding to the SR Configuration has data to be transmitted, at time t1, a first LCH with data to be transmitted appears in all the LCHs corresponding to the SR Configuration, which is denoted as LCH1, because LCH1 is the LCH with the highest priority of data to be transmitted, SR is triggered by LCH1, and at time t2, a second LCH with data to be transmitted appears in all the LCHs corresponding to the SR Configuration, which is denoted as LCH2, and the LCH2 priority is higher than LCH1, SR is triggered by LCH2 and transmission is performed using the PUCCH resource of the SR Configuration.

In a third possible implementation, the LCH triggering the SR may be the LCH which generates the data to be transmitted at last in the LCHs corresponding to the SR Configuration corresponding to the LCH, for example, at time t0, none of the LCHs corresponding to the SR Configuration has the data to be transmitted, at time t1, the first LCH to be transmitted appears in all the LCHs corresponding to the SR Configuration, which is denoted as LCH1, so the SR is triggered by LCH1, at time t2, the second LCH to be transmitted appears in all the LCHs corresponding to the SR Configuration, which is denoted as LCH2, the SR is triggered by LCH2, at time t3, the third LCH to be transmitted appears in all the LCHs corresponding to the SR Configuration, which is denoted as LCH3, the SR is triggered by LCH3, and the PUCCH resources of the SR Configuration are used for transmission, and so on.

When the UE sends SR or SR bundle once on the PUCCH resource of SR Configuration, it will add 1 to SR _ COUNTER. SR failure may be considered to occur when SR _ COUNTER reaches drs _ TransMax. Specifically, the occurrence of SR failure may have different definitions according to different SR _ COUNTER configurations:

for example, in a first possible implementation, if SR _ COUNTER is configured for each SR configuration, the SR COUNTER in any SR configuration in the UE's SR configurations reaches a maximum number of times; or, when the SR counters in a plurality of or all SR configurations in the SR configuration of the UE reach the maximum number of times, it is determined that the UE has SR failure. The meaning is that if SR _ COUNTER on any one or more SR _ configurations reaches drs _ TransMax, then SR failure is considered to occur; those skilled in the art will appreciate that the specific setting of SR _ COUNTER to drs _ TransMax may be that SR _ COUNTER equals drs _ TransMax, or that SR _ COUNTER exceeds or exceeds drx _ TransMax, depending on the set SR failure criterion, and the specific meaning of SR _ COUNTER to drs _ TransMax is defined in accordance with the present embodiment.

In a second possible implementation, if SR _ COUNTER is configured for each SR Configuration, if SR _ COUNTER on some or a plurality of or all SR _ configurations to which SR Pending SR is to be transmitted reaches drs _ TransMax of SR Configuration corresponding to SR _ COUNTER, SR failure is considered to occur; for example, when one SR _ COUTNER reaches drs _ TransMax of its corresponding SR Configuration, if another SR _ COUNTER of SR Configuration with Pending SR does not reach drs _ TransMax, or another SR _ COUNTER of SR Configuration with Pending SR triggered by LCH with higher priority does not reach drs _ TransMax, it may continue to send SR without performing random access until the another SR _ COUNTER of SR Configuration with Pending SR reaches drs _ TransMax, and it is considered that SR failure occurs; it should be noted that the specific meaning of SR _ COUNTER reaching drs _ TransMax refers to the description of the first possible embodiment.

In a third possible implementation, if SR _ COUNTER is configured for the MAC entity, SR failure is considered to occur if SR _ COUNTER reaches drs _ TransMax of SR Configuration corresponding to the last LCH that triggered sending SR; it should be noted that the specific meaning of SR _ COUNTER reaching drs _ TransMax refers to the description of the first possible embodiment.

In a fourth possible embodiment: if SR _ COUNTER is configured for the MAC entity, if SR _ COUNTER reaches the minimum or maximum drs _ TransMax of corresponding SR Configuration in all LCHs triggering the pending SR, then the SR failure is considered to occur; it should be noted that the specific meaning of SR _ COUNTER reaching drs _ TransMax refers to the description of the first possible embodiment.

In a fifth possible implementation, if SR _ COUNTER is configured for the UE, SR failure is considered to occur if SR _ COUNTER reaches drs _ TransMax of SR Configuration corresponding to the last LCH that triggered sending SR; it should be noted that the specific meaning of SR _ COUNTER reaching drs _ TransMax refers to the description of the foregoing first possible embodiment.

In a sixth possible embodiment: if SR _ COUNTER is configured for the UE, if SR _ COUNTER reaches the minimum or maximum drs _ TransMax of corresponding SR Configuration in all LCHs triggering the pending SR, then the SR failure is considered to occur; it should be noted that the specific meaning of SR _ COUNTER reaching drs _ TransMax refers to the description of the first possible embodiment.

It should be noted that the SR failure may have other definitions, and the present application is not limited thereto.

And if SR failure occurs, initiating a random access process based on the first random access configuration. The first random access configuration comprises at least one of power information and a backoff parameter. Specifically, the power information may include a transmission power ramping step and/or initial transmission power used by the UE when retransmitting the Preamble, and the backoff parameter may include a backoff time segment in which the UE retransmits the Preamble after receiving the RAR in the random access process, and further, the first random access configuration may further include one or more of a time-frequency resource used when performing random access, a maximum number of Preamble transmission times, a Preamble format or long short message, a contention resolution timer, and the like.

The initiating a random access procedure based on the first random access configuration may be initiating a random access procedure using the first random access configuration, and specifically, may be that, when a relevant message in a random access procedure is sent and/or received in the random access procedure is initiated, a configuration parameter in the first random access configuration is used, for example, when the first random access configuration includes PowerRampingStep for sending a Preamble, and when the UE performs random access, if the Preamble needs to be retransmitted, a step value indicated by the PowerRampingStep is used, that is, the transmission power for retransmitting the Preamble is set as the transmission power for sending the Preamble at the previous time plus the step value; and when the first random access configuration contains backoff information for sending the preamble, determining backoff time for retransmitting the preamble according to the backoff information after receiving the RAR.

In different embodiments, the specific parameters represented by the first random access configuration are different, specifically:

in a first possible implementation manner, the first random access configuration is a random access configuration corresponding to an LCH with the highest priority in a first LCH set corresponding to the UE. The scheme ensures the random access request of the LCH with the highest priority for data transmission, and ensures the reliability of the service.

In a second possible implementation, the first random access configuration is a random access configuration that can provide the highest quality of service QoS among the random access configurations associated with the first LCH set corresponding to the UE. The scheme ensures that the highest QoS which can be reached finishes the random access triggered by the SR failure, and ensures the reliability of the service.

Specifically, the first LCH set refers to at least two LCHs corresponding to the UE and having uplink data to be sent, and specifically includes the following cases:

and LCHs triggering the SR in the LCHs of the UE mean that the first LCH set comprises all LCHs triggering the SR in the LCHs configured by the UE. Or,

and the LCH corresponding to the SR configuration released by the UE after the SR failure has the LCH to be sent by the uplink data. Or,

and the UE triggers the LCH of the SR in the LCH corresponding to the SR configuration released after the SR failure occurs. Or,

and triggering the LCH corresponding to the SR configuration configured on the cell/bandwidth segment BWP where the SR configuration with the SR failure occurs to have the LCH to be sent by the uplink data. Or,

triggering the LCH of the SR in the LCH corresponding to the SR configuration configured on the cell/BWP where the SR failed is configured. Or,

and LCHs to be sent by uplink data exist in the LCHs corresponding to the SR configuration of all the service cells of the UE. Or,

and triggering LCH of the SR in the LCH corresponding to the SR configuration on all the service cells of the UE. Or,

and triggering LCH corresponding to the SR configuration with the SR failure to have the LCH to which the uplink data needs to be sent.

In the above scheme, it should be understood that, if the UE fails to SR, the first set of LCHs at least includes the LCH that triggered the SR failure. The SR Configuration to be released may be an SR Configuration that triggers SR failure, an SR Configuration configured on a cell (cell)/bandwidth segment (BWP) where the SR Configuration that triggers SR failure is located, or an SR Configuration on all serving cells (serving cells), and the like, and the present application is not limited thereto. Therefore, the first random access configuration is used for random access, so that the QoS requirement of the LCH with the highest priority in the first LCH set of the UE can be met, and the reliability of the service is ensured.

Those skilled in the art will understand that the QoS level of the random access configuration can be determined by the configuration parameters of the random access configuration, for example, the backoff time indicated by the backoff parameter is shorter and/or the PowerRampingStep indicated by the power information is larger, and it can be inferred that the QoS level of the configuration parameters of the random access configuration is higher when the random access procedure is performed; alternatively, the QoS class of the random access configuration may be determined by class indication information included in the random access configuration, as shown in the following table:

the network device may indicate the corresponding Priority Order of the random access configuration, and therefore, the UE may determine, as the first random access configuration, a random access configuration with a top Priority of the Priority Order among the random access configurations associated in the first LCH set.

Therefore, the random access configuration which is associated with the first LCH set of the user equipment and can provide the highest QoS can be applied to the random access using the first random access configuration, so that the reliability of the service is ensured as much as possible.

In a third possible implementation, the first random access Configuration is a random access Configuration associated with an SR Configuration with the highest priority in the first SR Configuration set of the UE.

In a fourth possible implementation, the first random access configuration is a random access configuration that provides a highest QoS class associated with the first set of SR configurations for the UE.

Specifically, the first SR configuration set includes at least one of SR configurations released by the UE after the SR failure occurs, and specifically includes the following cases:

all SR configurations of the UE; or,

the SR configuration of the SR is triggered; or,

SR configuration of data to be transmitted; or,

triggering an SR configuration in which the SR failure occurs; or,

SR configuration of the failure of the scheduling request; or,

In specific implementations of the foregoing several cases, if the first SR Configuration set is an SR Configuration released by the UE after the SR failure occurs, specifically, the released SR Configuration may be an SR Configuration that triggers the occurrence of the SR failure, or an SR Configuration configured on a cell/BWP where the SR Configuration that triggers the occurrence of the SR failure is located, or SR configurations on all serving cells, and the application is not limited in this application.

If the first SR Configuration set is an SR Configuration that triggers the SR failure, specifically, the SR Configuration that triggers the SR failure may be an SR Configuration that sends the SR last or a SR Configuration that sends the SR first, an SR Configuration that triggers the SR _ COUNTER to reach drs _ TransMax, an SR Configuration that triggers the SR _ COUNTER to start adding 1, or an SR Configuration that causes the SR _ COUNTER to add 1, and the like.

If the first SR Configuration set is an SR Configuration that generates SR failure, specifically, the SR Configuration that generates SR failure may be an SR Configuration that needs to be released, or the SR Configuration that generates SR failure is triggered, or the SR Configuration that triggers data to be transmitted on a corresponding LCH on a cell/BWP in which the SR Configuration that generates SR failure is located, or the SR Configuration that triggers SR to be transmitted on a corresponding LCH on a cell/BWP in which the SR Configuration that generates SR failure is located, or all SR configurations on a/BWP in which the SR Configuration that generates SR failure is located, or all SR configurations on all serving cells of the UE, and the like, the application is not limited;

the first SR Configuration set is the SR Configuration configured on the cell/bandwidth part BWP where the SR Configuration of the SR failure is triggered.

By the above manner, the QoS requirement of the SR Configuration with the highest priority in the first SR Configuration set of the user equipment can be satisfied by performing random access using the first random access Configuration, and reliability of service is ensured.

Therefore, the random access Configuration which is associated with the first SR Configuration set of the user equipment and can provide the highest QoS may be applied to the random access using the first random access Configuration, so as to ensure the reliability of the service as much as possible.

On the basis of the above scheme, the following describes a random access method provided by the present application by using a specific example.

Fig. 2 is a schematic diagram illustrating a UE performing random access when a scheduling request fails; as shown in fig. 2, assume that the UE is configured with LCH1 and LCH2, where LCH1 is used for eMBB traffic and LCH2 is used for URLLC traffic. The priority of LCH2 is greater than that of LCH1, and both LCHs have service data to be transmitted, and a scheduling request is triggered. The SR on the LCH1 is sent many times, the response of the network device is not received yet, and the SR counter reaches the preset maximum value, which triggers the SR failure of the UE, the UE initiates random access, and according to the above technical solution, the UE can select to use the random access configuration corresponding to the LCH2 with higher priority for random access. If there is data to be transmitted on an LCH with higher priority than LCH2, such as LCH3, the random access configuration corresponding to LCH3 is used as the random access configuration for random access.

Optionally, according to the foregoing scheme, if the UE releases the PUCCH resources corresponding to SR configuration 1 and SR configuration 2, and the priority of LCH2 is higher than LCH1, the random access configuration corresponding to LCH2 is determined as the random access configuration for performing random access. If there is still data to be transmitted on an LCH higher in priority than LCH2, such as LCH3, but the PUCCH resource of the SR configuration corresponding to LCH3 is not released, the random access configuration corresponding to LCH2 can still be used as the random access configuration for performing random access.

Optionally, according to the foregoing solution, if only LCH1 and LCH2 trigger the SR, and the priority of LCH2 is higher than LCH1, then the random access configuration corresponding to LCH2 is determined as the random access configuration for performing random access. If there is still data to be transmitted on an LCH with higher priority than the LCH2, such as LCH3, if LCH3 also triggers the pending SR, the random access configuration corresponding to LCH3 can be used as the random access configuration for performing random access. If the LCH3 does not trigger the pending SR, the random access configuration corresponding to the LCH2 can still be used as the random access configuration for performing random access.

Optionally, according to the foregoing scheme, if the UE releases the PUCCH resources corresponding to SR configuration 1 and SR configuration 2, and the priority of LCH2 is higher than LCH1, the random access configuration corresponding to LCH2 is determined as the random access configuration for performing random access.

In addition, the UE may further select a random access configuration capable of providing the highest QoS as the random access configuration for performing the random access, and the specific scheme refers to the foregoing description and is not described herein again.

The random access method provided by the embodiment ensures that the UE performs random access on the LCH with higher priority, namely, the service requirement of the LCH is ensured, and the reliability of the service is improved.

Fig. 3 is a schematic structural diagram of a first embodiment of a user equipment provided in the present application, and as shown in fig. 3, the user equipment 10 includes:

a storage module 11 for storing computer instructions; and a processing module 12 for invoking computer instructions stored in the memory to cause the user equipment to perform the following operations:

if the UE is not configured with uplink resources for transmitting the SR or the UE fails in the SR, the UE carries out random access by using first random access configuration;

In the ue provided in this embodiment, the user executes the random access method provided in the foregoing method embodiment, and the implementation principle and technical effect are similar, which are not described herein again.

On the basis of the above embodiments, the UE having SR failure includes:

Optionally, the first random access configuration includes power information and/or a backoff parameter.

Optionally, the at least two LCHs that have uplink data to send include:

triggering LCH of SR in LCH of the UE; or,

the UE releases the SR configuration after the SR failure, and the LCH corresponding to the SR configuration has the LCH to be sent by uplink data; or,

Optionally, the SR configuration released by the UE after the SR failure occurs includes:

all SR configurations of the UE; or,

the SR configuration of the SR is triggered; or,

SR configuration of data to be transmitted; or,

triggering an SR configuration in which the SR failure occurs; or,

SR configuration of failure of scheduling request occurs;

Optionally, the performing, by the UE, random access according to the first random access configuration includes:

fig. 4 is a schematic structural diagram of a second embodiment of a user equipment provided in the present application. As shown in fig. 4, the user equipment includes: a memory for storing computer instructions; and a processor for invoking computer instructions stored in the memory to cause the user equipment to perform operations comprising:

if the UE is not configured with uplink resources for transmitting the SR or the UE fails in the SR, the processor performs random access by using a first random access configuration;

Optionally, the user equipment may further comprise a transceiver for receiving and transmitting data.

Optionally, the UE failing to SR includes:

Optionally, the at least two LCHs that have uplink data to send include:

LCH of SR is triggered in LCH of the UE; or,

an LCH triggering an SR in LCHs corresponding to SR configurations on all serving cells of the UE, or,

all SR configurations of the UE; or,

the SR configuration of the SR is triggered; or,

SR configuration of data to be transmitted; or,

triggering an SR configuration in which the SR failure occurs; or,

SR configuration of failure of scheduling request occurs;

In the above specific implementation of the UE, the number of the processors is at least one, and the processors are configured to execute computer instructions stored in the memory, that is, a computer program, so that the user equipment performs the random access method provided in any embodiment of the first aspect.

The present application further provides a chip, comprising: the system comprises a processing module and a communication interface which are coupled with each other, wherein the processing module is used for executing the random access method provided by the method embodiment. The communication interface is used for communicating with other equipment under the control of the processing module. Memory for storing instructions and/or data may be integrated within the chip for retrieval by the processing module. The Chip may be a System-on-a-Chip (SoC), which may be referred to as a System-on-Chip or a System-on-Chip.

The present application also provides a readable storage medium, on which a computer program is stored, which, when executed on a computer, will make the computer execute the random access method provided by the method embodiments.

The present application further provides a program product, which includes a computer program, where the computer program is stored in a readable storage medium, and at least one processor of a user equipment reads from the readable storage medium and executes the computer program, so that the user equipment performs the random access method provided by the method embodiment.

In a Specific implementation of the ue, it should be understood that the Processor may be a Central Processing Unit (CPU), or may be other general purpose processors, digital Signal Processors (DSP), application Specific Integrated Circuits (ASIC), field Programmable Gate Arrays (FPGA) or other Programmable logic devices, discrete Gate or transistor logic devices, discrete hardware components, and so on. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.

It will also be appreciated that the memory referred to in the embodiments of the application may be either volatile memory or nonvolatile memory, or may include both volatile and nonvolatile memory. The non-volatile Memory may be a Read-Only Memory (ROM), a Programmable ROM (PROM), an Erasable PROM (EPROM), an Electrically Erasable PROM (EEPROM), or a flash Memory. Volatile Memory can be Random Access Memory (RAM), which acts as external cache Memory. By way of example, but not limitation, many forms of RAM are available, such as Static random access memory (Static RAM, SRAM), dynamic Random Access Memory (DRAM), synchronous Dynamic random access memory (Synchronous DRAM, SDRAM), double Data Rate Synchronous Dynamic random access memory (DDR SDRAM), enhanced Synchronous SDRAM (ESDRAM), synchronous link SDRAM (SLDRAM), and Direct Rambus RAM (DR RAM).

It should be noted that the memory described herein is intended to comprise, without being limited to, these and any other suitable types of memory.

Claims

1. A random access method, the method comprising:

if the SR failure occurs in the UE, the UE uses the first random access configuration to carry out random access;

wherein the first random access is configured as any one of: the random access configuration corresponding to the LCH with the highest priority in the first logic channel LCH set corresponding to the UE; or, the UE is configured to obtain a random access configuration that can provide a highest QoS among random access configurations associated with a first LCH set corresponding to the UE; or, a random access configuration corresponding to an SR configuration with the highest priority in a first SR configuration set corresponding to the UE; or, the UE is capable of providing the random access configuration with the highest QoS among the random access configurations associated with the first SR configuration set corresponding to the UE;

the first LCH set comprises at least two LCHs which need to be sent by uplink data in the LCHs of the UE; the first set of SR configurations comprises at least one of SR configurations released by the UE upon occurrence of the SR failure;

the SR configuration released by the UE after the SR failure occurs comprises:

all SR configurations of the UE; or,

the SR configuration of the SR is triggered; or,

SR configuration of data to be transmitted; or,

triggering an SR configuration in which the SR failure occurs; or,

SR configuration of the failure of the scheduling request;

2. The method of claim 1, wherein the UE has SR failure, comprising:

3. Method according to claim 1 or 2, wherein the first random access configuration comprises power information and/or a backoff parameter.

4. The method according to any of claims 1 to 3, wherein the at least two LCHs having uplink data to send comprise:

triggering LCH of SR in LCH of the UE; or,

5. The method of claim 3, wherein the UE performs random access according to the first random access configuration, and wherein the method comprises:

the UE sends a random access preamble to network equipment by using power information and/or backoff parameters; wherein, the power information includes a transmission power climbing step and/or initial transmission power used by the UE when retransmitting the random access preamble, and the backoff parameter includes a backoff time zone for retransmitting the random access preamble after the UE receives a Random Access Response (RAR) in the random access process.

6. A user equipment, the user equipment comprising: a storage module for storing computer instructions; and a processing module for invoking computer instructions stored in the memory to cause the user equipment to perform the following operations:

wherein the first random access is configured as any one of: the random access configuration corresponding to the LCH with the highest priority in the first LCH set corresponding to the UE; or, the UE is configured to obtain a random access configuration capable of providing a highest QoS from the random access configurations associated with the first LCH set corresponding to the UE; or, a random access configuration corresponding to an SR configuration with the highest priority in a first SR configuration set corresponding to the UE; or, the random access configuration capable of providing the highest QoS among the random access configurations associated with the first SR configuration set corresponding to the UE;

the first LCH set comprises at least two LCHs which have uplink data to be sent in the LCHs of the UE; the first set of SR configurations comprises at least one of SR configurations released by the UE after the occurrence of the SR failure;

the SR configuration released by the UE after the SR failure occurs comprises:

all SR configurations of the UE; or,

the SR configuration of the SR is triggered; or,

SR configuration of data to be transmitted; or,

triggering an SR configuration in which the SR failure occurs; or,

SR configuration of the failure of the scheduling request;

7. A user device, comprising: a memory for storing computer instructions; and a processor for invoking computer instructions stored in the memory to cause the user equipment to perform operations;

wherein the first random access is configured as any one of: the random access configuration corresponding to the LCH with the highest priority in the first LCH set corresponding to the UE; or, the UE is configured to obtain a random access configuration that can provide a highest QoS among random access configurations associated with a first LCH set corresponding to the UE; or, a random access configuration corresponding to an SR configuration with the highest priority in a first SR configuration set corresponding to the UE; or, the random access configuration capable of providing the highest QoS among the random access configurations associated with the first SR configuration set corresponding to the UE;

the first LCH set comprises at least two LCHs which have uplink data to be sent in the LCHs of the UE; the first set of SR configurations comprises at least one of SR configurations released by the UE upon occurrence of the SR failure;

the SR configuration released by the UE after the SR failure occurs comprises:

all SR configurations of the UE; or,

the SR configuration of the SR is triggered; or,

SR configuration of data to be transmitted; or,

triggering an SR configuration in which the SR failure occurs; or,

SR configuration of the failure of the scheduling request;

8. A readable storage medium having stored thereon a computer program, characterized in that the computer program, when executed on a computer, causes the computer to execute the random access method according to any of claims 1 to 5.

9. A program product, characterized in that the program product comprises a computer program, which is stored in a readable storage medium, from which at least one processor of a user equipment reads and executes the computer program, causing the user equipment to perform the random access method of any one of claims 1 to 5.