CN112970318A

CN112970318A - Random access method, equipment and storage medium

Info

Publication number: CN112970318A
Application number: CN201980073845.4A
Authority: CN
Inventors: 石聪
Original assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Current assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Priority date: 2019-04-30
Filing date: 2019-04-30
Publication date: 2021-06-15
Anticipated expiration: 2039-04-30
Also published as: WO2020220252A1; CN112970318B

Abstract

The invention discloses a random access method, which comprises the following steps: the method comprises the steps that terminal equipment obtains a first parameter of a timer, wherein the value of the first parameter of the timer is smaller than the value of a second parameter of the timer; and the terminal equipment judges whether to restart the random access or not based on the first parameter of the timer. The invention also discloses another random access method, terminal equipment, network equipment and a storage medium.

Description

Random access method, equipment and storage medium

Technical Field

The present invention relates to the field of wireless communications technologies, and in particular, to a random access method, a device, and a storage medium.

Background

In the related art, a terminal device establishes a radio link with a network device through Random Access Channel (RACH). Therefore, how to perform random access by the terminal device is a problem to be solved, which can improve the efficiency of random access.

Disclosure of Invention

In order to solve the foregoing technical problems, embodiments of the present invention provide a random access method, device, and storage medium, which can improve the efficiency of random access when a terminal device performs random access.

In a first aspect, an embodiment of the present invention provides a random access method, including: the method comprises the steps that terminal equipment obtains a first parameter of a timer, wherein the value of the first parameter of the timer is smaller than the value of a second parameter of the timer; and the terminal equipment judges whether to restart the random access or not based on the first parameter of the timer.

In a second aspect, an embodiment of the present invention provides a random access method, including: the network equipment sends a first parameter, wherein the first parameter is used for determining a first parameter of a timer by the terminal equipment, the value of the first parameter of the timer is smaller than that of a second parameter of the timer, and the first parameter of the timer is used for judging whether to restart random access by the terminal equipment.

In a third aspect, an embodiment of the present invention provides a terminal device, including: a processing unit configured to acquire a first parameter of a timer; and judging whether to restart random access or not based on the first parameter of the timer, wherein the value of the first parameter of the timer is smaller than that of the second parameter of the timer.

In a fourth aspect, an embodiment of the present invention provides a network device, where the network device includes: a sending unit, configured to send a first parameter, where the first parameter is used by a terminal device to determine a first parameter of a timer, a value of the first parameter of the timer is smaller than a value of a second parameter of the timer, and the first parameter of the timer is used by the terminal device to determine whether to restart random access.

In a fifth aspect, an embodiment of the present invention provides a terminal device, including a processor and a memory, where the memory is used for storing a computer program that can be executed on the processor, and the processor is configured to execute, when executing the computer program, the steps of the random access method executed by the terminal device.

In a sixth aspect, an embodiment of the present invention provides a network device, including a processor and a memory, where the memory is used for storing a computer program that can be executed on the processor, and the processor is configured to execute, when executing the computer program, the steps of the random access method performed by the network device.

In a seventh aspect, an embodiment of the present invention provides a storage medium, where an executable program is stored, and when the executable program is executed by a processor, the random access method executed by the terminal device is implemented.

In an eighth aspect, an embodiment of the present invention provides a storage medium, which stores an executable program, and when the executable program is executed by a processor, the random access method performed by the network device is implemented.

The random access method provided by the embodiment of the invention comprises the following steps: the method comprises the steps that terminal equipment obtains a first parameter of a timer, wherein the value of the first parameter of the timer is smaller than the value of a second parameter of the timer; and the terminal equipment judges whether to restart the RACH or not based on the first parameter of the timer. The value of the first parameter of the first timer is smaller than the value of the second parameter of the timer, the smaller of the first parameter and the second parameter is used for starting the timer, and a competition resolving message is monitored within the duration of the timer so as to judge whether the terminal equipment restarts the RACH; so that in a specific scenario (such as a scenario in which the Message (Message 4, Msg4) does not need to include an RRC Message in the random access procedure), the terminal device can use a shorter duration of the timer to resolve the collision; under the condition that conflict resolution fails, the terminal equipment can rapidly perform RACH for the next time; therefore, the time delay of random access can be shortened, and the RACH efficiency is improved.

Drawings

FIG. 1 is a flow chart illustrating a second type of random access process according to the present invention;

FIG. 2 is a schematic structural view of an RAR according to the present invention;

FIG. 3a is a schematic diagram of a format of the subheader of the present invention;

FIG. 3b is a schematic diagram of another format of the subheader of the present invention;

fig. 4 is a schematic structural diagram of a MAC PDU composed of RARs according to the present invention;

FIG. 5 is a flow chart illustrating a process of a first type of random access according to the present invention

FIG. 6 is a block diagram of a communication system according to an embodiment of the present invention;

fig. 7 is a schematic view of an alternative processing flow of a random access method according to an embodiment of the present invention;

fig. 8 is a schematic structural diagram of a terminal device according to an embodiment of the present invention;

fig. 9 is a schematic structural diagram of a network device according to an embodiment of the present invention;

fig. 10 is a schematic diagram of a hardware component structure of an electronic device according to an embodiment of the present invention.

Detailed Description

So that the manner in which the features and technical contents of the embodiments of the present invention can be understood in detail, a more particular description of the embodiments of the present invention will be rendered by reference to the appended drawings, which are included for purposes of illustration and not limitation.

Before describing the random access method provided by the embodiment of the present invention in detail, first, a first type of random access and a second type of random access are briefly described.

In a New Radio (NR) system, the RACH includes: a first type of random access and a second type of random access. In the first type of random access, 2 times of information interaction needs to be performed between the terminal device and the network device, and therefore, the first type of random access is also called two-step random access (2-steps RACH). In the second type of random access, 4 times of information interaction is required to be executed between the terminal equipment and the network equipment; therefore, the second type of random access is also referred to as four-step random access (4-steps RACH). The random access includes contention-based random access and non-contention-based random access according to different random access modes. The random access includes a first type random access and a second type random access according to different types of random access. The first and second types of random access will be briefly described below.

The processing flow of the second type of random access, as shown in fig. 1, includes the following four steps:

and step S101, the terminal equipment sends a random access Preamble to the network equipment through the Msg 1.

The terminal equipment sends the selected Preamble on the selected PRACH time domain resource; the network device can estimate the uplink Timing and the size of the uplink authorization required by the terminal device for transmitting the Msg3 according to the Preamble.

Step S102, after detecting that the terminal device sends a Preamble, the Network device sends a Random Access Response (RAR) message to the terminal device through the Msg2, so as to inform the terminal device of uplink resource information that can be used when sending the Msg3, allocate a temporary Radio Network Temporary Identity (RNTI) to the terminal device, and provide a time advance command for the terminal device.

After the terminal equipment sends the Msg1, opening an RAR window, and detecting a PDCCH in the RAR window; the detected PDCCH is scrambled by RA-RNTI, and the calculation formula of the RA-RNTI is as follows:

RA-RNTI＝1+s_id+14×t_id+14×80×f_id+14×80×8×ul_carrier_id；

according to the formula, RA-RNTI is related to PRACH time frequency resources.

The RAR includes a subheader (subheader), RAPID, payload, uplink (uplinkluk) grant (grant), and Temporary C-RNTI, as shown in fig. 2; the format of the subheader is shown in fig. 3a and fig. 3b, where BI is used to indicate the backoff time of the retransmission Msg 1. A schematic structural diagram of a Media Access Control Protocol Data Unit (MAC PDU) composed of RARs, as shown in fig. 4, where one RAP ID corresponds to one MAC RAR.

Step S103, after receiving the RAR message, the terminal device sends Msg3 in the uplink resource specified by the RAR message.

Wherein the Msg3 message is mainly used to inform the network device what event triggered the RACH procedure. For example, if it is an initial random access event, the Msg3 carries the terminal device ID and the estipalishment cause; if the event is an RRC reestablishment event, the Msg3 carries the connected terminal device identifier and the estipalishment cause.

Meanwhile, contention conflicts that the ID carried by Msg3 may be are resolved in step S104.

And step S104, the network equipment sends Msg4 to the terminal equipment, the Msg4 comprises a competition resolving message, and uplink transmission resources are distributed for the terminal equipment.

When the terminal device receives the Msg4 sent by the network device, it will detect whether the terminal device specific temporary identifier sent by the terminal device at Msg3 is included in the contention resolution message sent by the base station, if it is included, it indicates that the terminal device random access process is successful, otherwise, it is considered that the random access process is failed, and the terminal device needs to initiate the random access process from the first step again.

Another role of the Msg4 is to send a Radio Resource Control (RRC) configuration message to the terminal device.

The competition conflict resolution comprises two modes; wherein, the first mode is as follows: and if the terminal equipment carries a Cell Radio Network temporary Identity (C-RNTI) in the Msg3, the Msg4 uses the Physical Downlink Control Channel (PDCCH) scrambled by the C-RNTI for scheduling. The second way is: if the terminal equipment does not carry the C-RNTI in the Msg3, if the terminal equipment is initially accessed, the Msg4 carries out PDCCH scheduling by using the TC-RNTI scrambling; the conflict resolution is realized by the terminal device receiving a Physical Downlink Shared Channel (PDSCH) of the Msg4, and matching a Common Control Channel (CCCH) Service Data Unit (SDU) in the PDSCH.

The message contents carried by Msg1, Msg2, Msg3 and Msg4 in the second type of random access are shown in table 1.

TABLE 1

The RACH procedure is completed by performing four times of information interaction between the network device and the terminal device, resulting in a long delay time of the RACH procedure; to solve the problem of the lengthening of the RACH procedure, a first type of random access is proposed, and a processing procedure of the first type of random access is provided, as shown in fig. 5, including the following steps:

step S201, the terminal device sends MsgA to the network device.

MsgA consists of Preamble and payload. Optionally, the Preamble is the same as the Preamble in the second type of random access, and the Preamble is transmitted on the PRACH resource; the payload carries the same information as Msg3 in the second type of random access, such as RRC signaling when RRC is in idle state and C-RNTI when RRC is in connected state, and can be transmitted by Physical Uplink Shared Channel (PUSCH).

The results of the network device receiving the MsgA may include the following two: firstly, the network equipment successfully decodes one or more preambles; second, the network device successfully decodes one or more preambles and one or more payload.

Step S202, the terminal device receives the MsgB sent by the network device.

Optionally, MsgB comprises the content of Msg2 and Msg4 in the second type of random access.

In the related art, for the second type of random access, the terminal device obtains a parameter of a contention resolution timer (contention resolution timer) through a system message, or in a manner of obtaining a parameter of a target cell when adding a Scell or SCG, or in a cell handover, and monitors a contention resolution message sent by the network device for the duration of the contention resolution timer. No matter which way the terminal device obtains the parameter of the content resolution timer, the terminal device uses the only parameter of the content resolution timer; the terminal device uses a unique content resolution timer parameter regardless of the transition access in an idle (idle) state or an inactive (inactive) state or the RACH in a connected (connected) state.

The network device that receives the request during the initial access, or connection re-establishment, or connection recovery process needs to go to the core network or other network entities (e.g. other network devices) to obtain some context information of the terminal device. Therefore, if an infinite Resource Control (RRC) message is included in the Msg4, the Msg4 requires a long preparation time; accordingly, in order to ensure the success of RACH, the network device needs to configure a longer duration of the contention resolution timer. However, for a connected terminal device, the terminal device does not need to wait much time to receive Msg4 since the Msg4 does not need to contain an RRC message. In the related art, the use of a unique, longer duration timer would result in: when the terminal device in the connection state triggers the random access process, if the terminal device does not receive the contention resolution message (i.e. does not receive the PDCCH scheduled by the C-RNTI), the terminal device needs to wait for the timeout of the contention resolution timer before starting the next RACH attempt, which greatly increases the delay of RACH access and reduces the RACH efficiency.

Based on the above problem, the present invention provides a random access method, which can be applied to various communication systems, for example: a Global System for Mobile communications (GSM) System, a Code Division Multiple Access (CDMA) System, a Wideband Code Division Multiple Access (WCDMA) System, a General Packet Radio Service (GPRS), a Long Term Evolution (Long Term Evolution, LTE) System, an LTE Frequency Division Duplex (FDD) System, an LTE Time Division Duplex (TDD), a Universal Mobile Telecommunications System (UMTS), a Worldwide Interoperability for Microwave Access (WiMAX) communication System, or a 5G System.

Illustratively, the embodiment of the present application is applied to a communication system 100, as shown in fig. 6. The communication system 100 may include a network device 110, and the network device 110 may be a device that communicates with a terminal device 120 (or referred to as a communication terminal, a terminal). Network device 110 may provide communication coverage for a particular geographic area and may communicate with terminal devices located within that coverage area. Optionally, the Network device 110 may be a Base Transceiver Station (BTS) in a GSM system or a CDMA system, a Base Station (NodeB, NB) in a WCDMA system, an evolved Node B (eNB or eNodeB) in an LTE system, a Base Station (gNB) in an NR/5G system, or a Radio controller in a Cloud Radio Access Network (CRAN), or a Network device in a Mobile switching center, a relay Station, an Access point, a vehicle-mounted device, a wearable device, a hub, a switch, a bridge, a router, a Network-side device in a 5G Network, or a Network device in a future evolved Public Land Mobile Network (PLMN), and the like.

The communication system 100 further comprises at least one terminal device 120 located within the coverage area of the network device 110. As used herein, "terminal equipment" includes, but is not limited to, connections via wireline, such as Public Switched Telephone Network (PSTN), Digital Subscriber Line (DSL), Digital cable, direct cable connection; and/or another data connection/network; and/or via a Wireless interface, e.g., to a cellular Network, a Wireless Local Area Network (WLAN), a digital television Network such as a DVB-H Network, a satellite Network, an AM-FM broadcast transmitter; and/or means of another terminal device arranged to receive/transmit communication signals; and/or Internet of Things (IoT) devices. A terminal device arranged to communicate over a wireless interface may be referred to as a "wireless communication terminal", "wireless terminal", or "mobile terminal". Examples of mobile terminals include, but are not limited to, satellite or cellular telephones; personal Communications Systems (PCS) terminals that may combine cellular radiotelephones with data processing, facsimile, and data Communications capabilities; PDAs that may include radiotelephones, pagers, internet/intranet access, Web browsers, notepads, calendars, and/or Global Positioning System (GPS) receivers; and conventional laptop and/or palmtop receivers or other electronic devices that include a radiotelephone transceiver. Terminal Equipment may refer to an access terminal, User Equipment (UE), subscriber unit, subscriber station, mobile station, remote terminal, mobile device, User terminal, wireless communication device, User agent, or User Equipment. An access terminal may be a cellular telephone, a cordless telephone, a Session Initiation Protocol (SIP) phone, a Wireless Local Loop (WLL) station, a Personal Digital Assistant (PDA), a handheld device having Wireless communication capabilities, a computing device or other processing device connected to a Wireless modem, a vehicle mounted device, a wearable device, a terminal device in a 5G network, or a terminal device in a future evolved PLMN, etc.

Optionally, a Device to Device (D2D) communication may be performed between the terminal devices 120.

Alternatively, the 5G system or the 5G network may also be referred to as a New Radio (NR) system or an NR network.

Fig. 6 exemplarily shows one network device and two terminal devices, and optionally, the communication system 100 may include a plurality of network devices and may include other numbers of terminal devices within the coverage of each network device, which is not limited in this embodiment of the present application.

Optionally, the communication system 100 may further include other network entities such as a network controller, a mobility management entity, and the like, which is not limited in this embodiment.

It should be understood that a device having a communication function in a network/system in the embodiments of the present application may be referred to as a communication device. Taking the communication system 100 shown in fig. 6 as an example, the communication device may include a network device 110 and a terminal device 120 having a communication function, and the network device 110 and the terminal device 120 may be the specific devices described above, which are not described herein again; the communication device may also include other devices in the communication system 100, such as other network entities, for example, a network controller, a mobility management entity, and the like, which is not limited in this embodiment.

As shown in fig. 7, an optional processing flow of the random access method provided in the embodiment of the present invention includes the following steps:

step S301, a terminal device acquires a first parameter of a timer, wherein the value of the first parameter of the timer is smaller than the value of a second parameter of the timer;

in the embodiment of the present invention, the second parameter of the timer is a parameter of a timer in the prior art, and is obtained by the terminal device through a system message. The first parameter of the timer is a newly added timer parameter.

In some embodiments, the terminal device may obtain the first parameter of the timer through a system message. In specific implementation, the network device broadcasts a first parameter of the timer and a second parameter of the timer through the system message, and the terminal device obtains the first parameter of the timer and the second parameter of the timer through receiving the system message; the first parameter of the timer and the second parameter of the timer are both parameters representing the duration of the timer.

At this time, the terminal device obtains two parameters (a first parameter of the timer and a second parameter of the timer) representing the duration of the timer, and the terminal device uses the first parameter of the timer under any one of the following conditions: the random access triggered by the terminal device in idle state or inactive state based on System Information (SI) Request (Request), the random access triggered by the terminal device in connected state based on Scheduling Request (SR), the random access triggered by the terminal device in connected state based on beam failure recovery (beam failure recovery), and the random access triggered by the terminal device in connected state based on PDCCH order. When the terminal equipment uses the first parameter of the timer to trigger the timer, the terminal equipment ignores the second parameter of the timer.

Optionally, the SI request is Msg3-based SI request; the terminal device in the connected state performs a Contention Based Random Access (CBRA) Random Access triggered Based on the PDCCH order.

Based on the above embodiment, the TS38.331 and RRC protocol specification are modified as follows:

in other embodiments, the terminal device obtains the second parameter of the timer through the system message, and agrees the scaling factor through the system message, or the RRC dedicated signaling, or through the protocol, where the value of the scaling factor is smaller than 1; and the terminal equipment calculates the product of the second parameter of the timer and the scaling factor to obtain the first parameter of the timer.

At this time, the terminal device obtains two parameters (a first parameter of the timer and a second parameter of the timer) representing the duration of the timer, and the terminal device uses the first parameter of the timer under any one of the following conditions: the method comprises the steps that terminal equipment in idle state or inactive state is subjected to random access triggered based on SI request, terminal equipment in connected state is subjected to random access triggered based on SR, terminal equipment in connected state is subjected to random access triggered based on beam failure recovery, and terminal equipment in connected state is subjected to random access triggered based on PDCCH order.

Optionally, the SI request is Msg3-based SI request; and the terminal equipment in the connected state performs CBRA random access triggered based on the PDCCH order.

In still other embodiments, the terminal device may obtain the first parameter of the timer through RRC dedicated signaling. In specific implementation, the network device broadcasts a first parameter of the timer through a system message, and sends a second parameter of the timer through an RRC dedicated signaling; the terminal equipment receives a first parameter of a timer and a second parameter of the timer; the first parameter of the timer and the second parameter of the timer are both parameters representing the duration of the timer. Optionally, the RRC dedicated signaling is an RRC reconfiguration message.

At this time, the terminal device obtains two parameters (a first parameter of the timer and a second parameter of the timer) representing the duration of the timer, and the terminal device uses the first parameter of the timer under any one of the following conditions: the method comprises the following steps of random access triggered by terminal equipment in a connected state based on SR, random access triggered by terminal equipment in a connected state based on beam failure recovery, and random access triggered by terminal equipment in a connected state based on PDCCH order. When the terminal device triggers the timer by using the first parameter of the timer, the terminal device overrides the second parameter of the timer by using the first parameter of the timer. And when the terminal equipment leaves the connected state, the terminal equipment resumes to use the second parameter of the timer, namely the terminal equipment triggers the timer by using the second parameter of the timer.

in some further embodiments, when the terminal device receives the first parameters of the two timers through the system message and the RRC dedicated signaling, respectively, the terminal device in the connected state triggers the timer by using the first parameter of the timer received through the RRC dedicated signaling; and when the terminal equipment leaves the connection state, triggering the timer by utilizing the first parameter of the timer received through the system message.

Step S302, the terminal equipment judges whether to restart the random access based on the first parameter of the timer.

In specific implementation, the terminal device starts a timer based on a first parameter of the timer, and monitors a contention resolution message within the duration of the timer; and under the condition that the competition resolving message is not monitored in the duration of the timer, the terminal equipment judges to restart the random access. Optionally, the contention resolution message is a PDCCH scheduled by a C-RNTI.

In the above embodiments of the present invention, a shorter timer parameter (the first parameter of the timer) is added based on the existing timer parameter (the second parameter of the timer); aiming at a scene that the Msg4 does not need to contain an RRC message in the random access process, the terminal equipment can use a shorter timer parameter to solve the contention conflict; under the condition that the competition fails, the next RACH attempt can be rapidly carried out, so that the time delay of RACH access is shortened, and the RACH efficiency is improved.

It should be noted that, based on the random access method described in the embodiment of the present invention, the configuration of the MsgB window may be newly added in the 2-step RACH, and when the MsgB does not need to include an RRC message, the terminal device uses the shorter MsgB window configured by the network device. In this case, the random access is any one of: the method comprises the following steps of 2-step random access triggered by terminal equipment in idle state or inactive state based on SI request, 2-step random access triggered by terminal equipment in connected state based on SR, 2-step random access triggered by terminal equipment in connected state based on beam failure recovery, and 2-step random access triggered by terminal equipment in connected state based on PDCCH order. Alternatively, the newly added MsgB window may be notified to the terminal device by the network device through a system message or RRC dedicated signaling.

In order to implement the foregoing random access method, an embodiment of the present invention further provides a terminal device, where a structure of the terminal device is as shown in fig. 8, and the terminal device 400 includes:

a processing unit 401 configured to obtain a first parameter of a timer; and judging whether to restart random access or not based on the first parameter of the timer, wherein the value of the first parameter of the timer is smaller than that of the second parameter of the timer.

In the embodiment of the invention, the first parameter of the timer and the second parameter of the timer are acquired through system information. The processing unit 401 is further configured to ignore the second parameter of the timer.

In this embodiment of the present invention, the value of the first parameter of the timer is a product of the value of the second parameter of the timer and a scaling factor.

Wherein the scaling factor is obtained through system information;

or, the scaling factor is obtained through RRC dedicated signaling;

or, the scaling factor is a fixed value agreed by the protocol.

When the first parameter of the timer and the second parameter of the timer are acquired through system information, or when the value of the first parameter of the timer is a product of the value of the second parameter of the timer and a scaling factor, the random access includes any one of the following:

the terminal equipment in an idle state or an inactive state requests the triggered random access based on the system information;

the terminal equipment in the connection state is randomly accessed based on the triggering of the scheduling request;

the terminal equipment in the connection state is subjected to random access triggered based on beam failure repair;

and the terminal equipment in the connected state performs random access based on PDCCH order triggering.

In the embodiment of the invention, the second parameter of the timer is acquired through system information, and the first parameter of the timer is acquired through RRC dedicated signaling. The processing unit 401 is further configured to override the second parameter of the timer with the first parameter of the timer. At this time, the random access includes any one of:

When the first parameter of the timer is obtained through RRC dedicated signaling, the random access includes any one of:

Optionally, in a case that the terminal device leaves the connected state, the processing unit is further configured to determine whether to restart the random access based on a second parameter of the timer.

In this embodiment of the present invention, the processing unit 401 is configured to start a timer based on a first parameter of the timer, and monitor a contention resolution message within a duration of the timer;

and under the condition that the competition resolving message is not monitored in the duration of the timer, judging to restart the random access.

In the embodiment of the invention, the random access is 4-step random access based on competition.

In order to implement the foregoing random access method, an embodiment of the present invention further provides a network device, where the network device has a structure, as shown in fig. 9, and the network device 500 includes:

a sending unit 501, configured to send a first parameter, where the first parameter is used by a terminal device to determine a first parameter of a timer, a value of the first parameter of the timer is smaller than a value of a second parameter of the timer, and the first parameter of the timer is used by the terminal device to determine whether to restart random access.

In the embodiment of the present invention, the second parameter of the timer and the first parameter are sent through system information.

In this embodiment of the present invention, the first parameter is a first parameter of the timer or a scaling factor. In a case where the first parameter is the scaling factor, the value of the first parameter of the timer is a product of the value of the second parameter of the timer and the scaling factor. The random access includes any one of:

In this embodiment of the present invention, the first parameter is a first parameter of a timer sent through RRC dedicated signaling. Wherein the random access includes any one of: the terminal equipment in the connection state is randomly accessed based on the triggering of the scheduling request; the terminal equipment in the connection state is subjected to random access triggered based on beam failure repair; and the terminal equipment in the connected state is triggered to access randomly based on the PDCCH order.

In the embodiment of the present invention, when the terminal device leaves the connected state, the second parameter of the timer is used for the terminal device to determine whether to restart the random access.

The embodiment of the present invention further provides a terminal device, which includes a processor and a memory for storing a computer program capable of running on the processor, wherein the processor is configured to execute the steps of the random access method executed by the terminal device when running the computer program.

The embodiment of the present invention further provides a network device, which includes a processor and a memory for storing a computer program capable of running on the processor, wherein the processor is configured to execute the steps of the random access method executed by the network device when running the computer program.

Fig. 10 is a schematic diagram of a hardware composition structure of electronic devices (a terminal device and a network device) according to an embodiment of the present invention, where the electronic device 700 includes: at least one processor 701, a memory 702, and at least one network interface 704. The various components in the electronic device 700 are coupled together by a bus system 705. It is understood that the bus system 705 is used to enable communications among the components. The bus system 705 includes a power bus, a control bus, and a status signal bus in addition to a data bus. But for the sake of clarity the various busses are labeled in figure 10 as the bus system 705.

It will be appreciated that the memory 702 can be either volatile memory or nonvolatile memory, and can include both volatile and nonvolatile memory. The non-volatile Memory may be ROM, Programmable Read-Only Memory (PROM), Erasable Programmable Read-Only Memory (EPROM), Electrically Erasable Programmable Read-Only Memory (EEPROM), magnetic random access Memory (FRAM), Flash Memory (Flash Memory), magnetic surface Memory, optical Disc, or Compact Disc Read-Only Memory (CD-ROM); the magnetic surface storage may be disk storage or tape storage. Volatile Memory can be Random Access Memory (RAM), which acts as external cache Memory. By way of illustration and not limitation, many forms of RAM are available, such as Static Random Access Memory (SRAM), Synchronous Static Random Access Memory (SSRAM), Dynamic Random Access Memory (DRAM), Synchronous Dynamic Random Access Memory (SDRAM), Double Data Rate Synchronous Dynamic Random Access Memory (DDRSDRAM), Enhanced Synchronous Dynamic Random Access Memory (ESDRAM), Enhanced Synchronous Dynamic Random Access Memory (Enhanced DRAM), Synchronous Dynamic Random Access Memory (SLDRAM), Direct Memory (DRmb Access), and Random Access Memory (DRAM). The memory 702 described in connection with the embodiments of the invention is intended to comprise, without being limited to, these and any other suitable types of memory.

The memory 702 in embodiments of the present invention is used to store various types of data in support of the operation of the electronic device 700. Examples of such data include: any computer program for operating on electronic device 700, such as application 7022. Programs that implement methods in accordance with embodiments of the present invention can be included within application program 7022.

The method disclosed in the above embodiments of the present invention may be applied to the processor 701, or implemented by the processor 701. The processor 701 may be an integrated circuit chip having signal processing capabilities. In implementation, the steps of the above method may be implemented by integrated logic circuits of hardware or instructions in the form of software in the processor 701. The Processor 701 may be a general purpose Processor, a Digital Signal Processor (DSP), or other programmable logic device, discrete gate or transistor logic device, discrete hardware components, or the like. The processor 701 may implement or perform the methods, steps, and logic blocks disclosed in embodiments of the present invention. A general purpose processor may be a microprocessor or any conventional processor or the like. The steps of the method disclosed by the embodiment of the invention can be directly implemented by a hardware decoding processor, or can be implemented by combining hardware and software modules in the decoding processor. The software modules may be located in a storage medium located in the memory 702, and the processor 701 may read the information in the memory 702 and perform the steps of the aforementioned methods in conjunction with its hardware.

In an exemplary embodiment, the electronic Device 700 may be implemented by one or more Application Specific Integrated Circuits (ASICs), DSPs, Programmable Logic Devices (PLDs), Complex Programmable Logic Devices (CPLDs), FPGAs, general purpose processors, controllers, MCUs, MPUs, or other electronic components for performing the foregoing methods.

The embodiment of the application also provides a storage medium for storing the computer program.

Optionally, the storage medium may be applied to the terminal device in the embodiment of the present application, and the computer program enables the computer to execute corresponding processes in each method in the embodiment of the present application, which is not described herein again for brevity.

Optionally, the storage medium may be applied to a network device in the embodiment of the present application, and the computer program enables a computer to execute corresponding processes in each method in the embodiment of the present application, which is not described herein again for brevity.

The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, and any modifications, equivalents, improvements, etc. that are within the spirit and principle of the present invention should be included in the present invention.

Claims

A random access method, the method comprising:

the method comprises the steps that terminal equipment obtains a first parameter of a timer, wherein the value of the first parameter of the timer is smaller than the value of a second parameter of the timer;

and the terminal equipment judges whether to restart the random access or not based on the first parameter of the timer.
The method of claim 1, wherein the first parameter of the timer and the second parameter of the timer are obtained through system information.
The method of claim 2, wherein the method further comprises: and the terminal equipment ignores the second parameter of the timer.
The method of claim 1, wherein the value of the first parameter of the timer is a product of the value of the second parameter of the timer and a scaling factor.
The method of claim 4, wherein the scaling factor is obtained by system information;

or, the scaling factor is obtained through Radio Resource Control (RRC) dedicated signaling;

or, the scaling factor is a fixed value agreed by the protocol.
The method according to any of claims 2 to 5, wherein the random access comprises any of:

the terminal equipment in an idle state or an inactive state requests the triggered random access based on the system information;

the terminal equipment in the connection state is randomly accessed based on the triggering of the scheduling request;

the terminal equipment in the connection state is subjected to random access triggered based on beam failure repair;

and the terminal equipment in the connection state commands the PDCCH order to trigger random access based on the physical downlink control channel.
The method of claim 1, wherein the second parameter of the timer is obtained through system information, and the first parameter of the timer is obtained through RRC dedicated signaling.
The method of claim 7, wherein the method further comprises:

and the terminal equipment covers the second parameter of the timer by using the first parameter of the timer.
The method according to claim 7 or 8, wherein the random access comprises any one of:

the terminal equipment in the connection state is randomly accessed based on the triggering of the scheduling request;

the terminal equipment in the connection state is subjected to random access triggered based on beam failure repair;

and the terminal equipment in the connected state performs random access based on PDCCH order triggering.
The method according to any of claims 7 to 9, wherein in case the terminal device leaves the connected state, the method further comprises:

and the terminal equipment judges whether to restart the random access or not based on the second parameter of the timer.
The method according to any one of claims 1 to 10, wherein the determining, by the terminal device, whether to restart random access based on the first timer parameter comprises:

the terminal equipment starts a timer based on a first parameter of the timer, and monitors a competition resolving message within the duration of the timer;

and under the condition that the competition resolving message is not monitored in the duration of the timer, the terminal equipment judges to restart the random access.
The method according to any of claims 1 to 11, wherein the random access is a contention-based 4-step random access.
A random access method, the method comprising:

the network equipment sends a first parameter, wherein the first parameter is used for determining a first parameter of a timer by the terminal equipment, the value of the first parameter of the timer is smaller than that of a second parameter of the timer, and the first parameter of the timer is used for judging whether to restart random access by the terminal equipment.
The method of claim 13, wherein the second parameter of the timer and the first parameter are transmitted through system information.
The method of claim 13 or 14, wherein the first parameter is a first parameter of the timer or a scaling factor.
The method of claim 15, wherein, in the case that the first parameter is the scaling factor, the value of the first parameter of the timer is a product of the value of the second parameter of the timer and the scaling factor.
The method according to any of claims 14 to 16, wherein the random access comprises any of:

the terminal equipment in an idle state or an inactive state requests the triggered random access based on the system information;

the terminal equipment in the connection state is randomly accessed based on the triggering of the scheduling request;

the terminal equipment in the connection state is subjected to random access triggered based on beam failure repair;

and the terminal equipment in the connection state commands the PDCCH order to trigger random access based on the physical downlink control channel.
The method of claim 13, wherein the first parameter is a first parameter of a timer sent through RRC dedicated signaling.
The method of claim 18, wherein the random access comprises any one of:

the terminal equipment in the connection state is randomly accessed based on the triggering of the scheduling request;

the terminal equipment in the connection state is subjected to random access triggered based on beam failure repair;

and the terminal equipment in the connected state performs random access based on PDCCH order triggering.
The method according to claim 18 or 19, wherein in case the terminal device leaves the connected state, the second parameter of the timer is used for the terminal device to decide whether to restart random access.
The method according to any of claims 13 to 20, wherein the random access is a contention-based 4-step random access.
A terminal device, the terminal device comprising:

a processing unit configured to acquire a first parameter of a timer; and judging whether to restart random access or not based on the first parameter of the timer, wherein the value of the first parameter of the timer is smaller than that of the second parameter of the timer.
The terminal device of claim 22, wherein the first parameter of the timer and the second parameter of the timer are obtained through system information.
The terminal device of claim 23, wherein the processing unit is further configured to ignore the second parameter of the timer.
The terminal device of claim 22, wherein the value of the first parameter of the timer is a product of the value of the second parameter of the timer and a scaling factor.
The terminal device of claim 25, wherein the scaling factor is obtained by system information;

or, the scaling factor is obtained through Radio Resource Control (RRC) dedicated signaling;

or, the scaling factor is a fixed value agreed by the protocol.
The terminal device of any of claims 23 to 26, wherein the random access comprises any of:

the terminal equipment in an idle state or an inactive state requests the triggered random access based on the system information;

the terminal equipment in the connection state is randomly accessed based on the triggering of the scheduling request;

the terminal equipment in the connection state is subjected to random access triggered based on beam failure repair;

and the terminal equipment in the connection state commands the PDCCH order to trigger random access based on the physical downlink control channel.
The terminal device of claim 22, wherein the second parameter of the timer is obtained through system information, and the first parameter of the timer is obtained through RRC dedicated signaling.
The terminal device of claim 28, wherein the processor is further configured to override the second parameter of the timer with the first parameter of the timer.
The terminal device of claim 28 or 29, wherein the random access comprises any one of:

the terminal equipment in the connection state is randomly accessed based on the triggering of the scheduling request;

the terminal equipment in the connection state is subjected to random access triggered based on beam failure repair;

and the terminal equipment in the connected state performs random access based on PDCCH order triggering.
The terminal device according to any of claims 28 to 30, wherein in case the terminal device leaves the connected state, the processing unit is further configured to determine whether to restart random access based on a second parameter of the timer.
The terminal device according to any of claims 22 to 31, wherein the processing unit is configured to start a timer based on a first parameter of the timer, and listen for a contention resolution message for a duration of the timer;

and under the condition that the competition resolving message is not monitored in the duration of the timer, judging to restart the random access.
The terminal device of any of claims 22 to 32, wherein the random access is a contention-based 4-step random access.
A network device, the network device comprising:

a sending unit, configured to send a first parameter, where the first parameter is used by a terminal device to determine a first parameter of a timer, a value of the first parameter of the timer is smaller than a value of a second parameter of the timer, and the first parameter of the timer is used by the terminal device to determine whether to restart random access.
The network device of claim 34, wherein the second parameter of the timer and the first parameter are transmitted via system information.
The network device of claim 34 or 35, wherein the first parameter is a first parameter of the timer or a scaling factor.
The network device of claim 36, wherein the value of the first parameter of the timer is a product of the value of the second parameter of the timer and a scaling factor if the first parameter is the scaling factor.
Network device of any of claims 35 to 37, wherein the random access comprises any of:

the terminal equipment in an idle state or an inactive state requests the triggered random access based on the system information;

the terminal equipment in the connection state is randomly accessed based on the triggering of the scheduling request;

the terminal equipment in the connection state is subjected to random access triggered based on beam failure repair;

and the terminal equipment in the connection state commands the PDCCH order to trigger random access based on the physical downlink control channel.
The network device of claim 34, wherein the first parameter is a first parameter of a timer sent through RRC dedicated signaling.
The network device of claim 39, wherein the random access comprises any one of:

the terminal equipment in the connection state is randomly accessed based on the triggering of the scheduling request;

the terminal equipment in the connection state is subjected to random access triggered based on beam failure repair;

and the terminal equipment in the connected state performs random access based on PDCCH order triggering.
The network device according to claim 39 or 40, wherein the second parameter of the timer is used for the terminal device to determine whether to restart random access in case the terminal device leaves the connected state.
The network device of any one of claims 34 to 41, wherein the random access is a contention-based 4-step random access.
A terminal device comprising a processor and a memory for storing a computer program capable of running on the processor, wherein,

the processor is adapted to perform the steps of the random access method of any of claims 1 to 12 when running the computer program.
A network device comprising a processor and a memory for storing a computer program capable of running on the processor, wherein,

the processor is adapted to perform the steps of the random access method of any of claims 13 to 21 when running the computer program.
A storage medium storing an executable program which, when executed by a processor, implements the random access method of any one of claims 1 to 12.
A storage medium storing an executable program which, when executed by a processor, implements the random access method of any one of claims 13 to 21.