WO2023010461A1

WO2023010461A1 - Random access condition reporting method, terminal device, and network device

Info

Publication number: WO2023010461A1
Application number: PCT/CN2021/111024
Authority: WO
Inventors: 杜忠达
Original assignee: Oppo广东移动通信有限公司
Priority date: 2021-08-05
Filing date: 2021-08-05
Publication date: 2023-02-09
Also published as: CN117223381A

Abstract

Embodiments of the present invention provide a random access condition reporting method, a terminal device, and a network device, which are applied to the technical field of communications. The embodiments of the present invention comprises: sending a first physical uplink shared channel (PUSCH) to a network device, the first PUSCH carrying random access condition information, the random access condition information being used for indicating a reason for triggering a random access, the first PUSCH being associated with a first preamble signal.

Description

Method for reporting random access conditions, terminal equipment, and network equipment

technical field

The invention relates to the field of communication technology, in particular to a method for reporting random access conditions, terminal equipment and network equipment.

Background technique

When introducing the two-step random access (2-step RACH) process in the 5G NR system, the preamble originally reserved for the four-step random access (4-step RACH) process can be used as the random access radio of the 2-step RACH However, when a new preamble range is introduced for a new random access condition, further division needs to be made in the existing reserved preamble, so that network devices can distinguish these new random access trigger conditions. However, with the increasing number of newly introduced random access trigger conditions, limited by the limited preamble range, the preamble range corresponding to each random access condition will be very small, resulting in a high probability of random access conflicts.

Contents of the invention

Embodiments of the present invention provide a method for reporting random access conditions, a terminal device and a network device, which can reduce the probability of random access conflicts.

In the first aspect, a method for reporting random access conditions is provided, which is applied to a terminal device, including:

sending the first physical uplink shared channel PUSCH to the network device;

The first PUSCH carries random access condition information, and the random access condition information is used to indicate the reason for triggering random access

Wherein, the first PUSCH is associated with a first preamble signal.

In the second aspect, a method for reporting random access conditions is provided, which is applied to network devices, including:

receiving the first PUSCH sent by the terminal device;

Wherein, the first PUSCH is associated with a first preamble signal.

In a third aspect, a terminal device is provided, including: a transmitter, configured to send a first physical uplink shared channel PUSCH to a network device;

Wherein, the first PUSCH is associated with a first preamble signal.

In a fourth aspect, a network device is provided, including: a receiver, configured to receive a first PUSCH sent by a terminal device;

The first PUSCH carries random access condition information, and the random access condition information is used to indicate the reason for triggering random access;

Wherein, the first PUSCH is associated with a first preamble signal.

In a fifth aspect, a terminal device is provided, including: a sending module, configured to send a first physical uplink shared channel PUSCH to a network device;

Wherein, the first PUSCH is associated with a first preamble signal.

In a sixth aspect, a network device is provided, including: a receiving module, configured to receive a first PUSCH sent by a terminal device;

Wherein, the first PUSCH is associated with a first preamble signal.

In a seventh aspect, there is provided a computer-readable storage medium, including: computer instructions, which, when run on a computer, cause a processor to execute the method according to the above-mentioned first aspect or any optional implementation manner of the first aspect , or, execute the method of the second aspect or any optional implementation manner of the second aspect.

In an eighth aspect, a computer program product is provided, including computer instructions. When the computer program product runs on a computer, the processor executes the computer instructions, so that the processor executes any one of the above-mentioned first aspect or the first aspect. The method of the selected implementation manner, or execute the method of the second aspect or any optional implementation manner of the second aspect.

In the ninth aspect, there is provided a chip, the chip is coupled with the memory in the terminal device, so that the chip invokes the program instructions stored in the memory during operation, so that the terminal device executes any one of the optional functions of the first aspect or the first aspect above. The method of the implementation manner of the second aspect, or the method of making the network device execute the second aspect or any optional implementation manner of the second aspect.

The present invention provides a method for reporting random access conditions. In the method, a terminal device can send a first PUSCH to a network device; the first PUSCH carries random access condition information, and the random access condition information is used to indicate triggering random access , wherein the first PUSCH is associated with the first preamble. Through this solution, the terminal device can carry the random access condition information in the first PUSCH associated with the first preamble, compared with indicating the random access condition through the preamble, without being limited by the range of the preamble, and does not need to Further division is made in the reserved preamble, which can reduce the probability of random access collisions.

Description of drawings

FIG. 1 is a schematic diagram of repeatedly configuring ROs according to a certain period in the time domain provided by an embodiment of the present invention;

FIG. 2 is a schematic diagram of an association relationship between an RO and an SSB provided by an embodiment of the present invention;

FIG. 3 is a schematic structural diagram of a communication system applied by an embodiment of the present invention provided by an embodiment of the present invention;

FIG. 4 is a schematic flowchart of a method for reporting random access conditions provided by an embodiment of the present invention;

FIG. 5 is a first structural schematic diagram of a terminal device provided by an embodiment of the present invention;

FIG. 6 is a schematic structural diagram of a network device provided by an embodiment of the present invention;

Fig. 7 is a schematic structural diagram of a base station provided by an embodiment of the present invention

FIG. 8 is a second structural schematic diagram of a terminal device provided by an embodiment of the present invention;

Detailed ways

The technical solutions in the embodiments of the present invention will be described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative efforts fall within the protection scope of the present invention.

Firstly, the relevant technologies involved in the embodiments of the present invention are introduced:

In the third generation partnership project (3rd Generation Partnership Project, 3GPP) communication system, such as the 5G new air interface (New Radio, NR) system, the terminal device can establish, rebuild or restore a radio resource control ( Radio Resource Control, RRC) link, or in the case of RRC link, through random access to achieve the purpose of initialization of uplink synchronization and power control.

In some cases, the base station needs to distinguish the reason why the terminal device sends the random access through the first step of the terminal device in the random access process, so as to implement access control or better complete the random access process. Wherein, in the first step of the random access process, the base station will receive a preamble signal (preamble) sent by the terminal device.

The random access radio resource (referred to as the original random access radio resource in this paper) used publicly in the cell configured by the 5G NR system is used for 4 step random access (4 step Random Access Channel, 4 step RACH) at the beginning process. The smallest unit of random access radio resources in the time-frequency domain is called a random access channel opportunity (RACH occasion, RO), and there are 64 preambles in one RO. In the 5G NR system, the length of a radio frame is 10 milliseconds, including 10 subframes with a length of 1 millisecond.

Wherein, the number of time slots included in a subframe is related to the sub-carrier space (SCS) of the carrier. For example, there is one time slot in a sub-frame on a carrier with a sub-carrier space of 15KHz.

Optionally, other subcarrier intervals include K time slots, where K is equal to a ratio between other subcarrier intervals and 15 KHz.

For example, when SCS=120KHz, one subframe may include 8 time slots. There are 14 symbols in one slot.

An RO can be several symbols in a time slot in the time domain, that is, a time slot can contain multiple ROs, or a time slot can span several time slots (that is, several time slots constitute a RO).

An RO is composed of several consecutive PRBs in the frequency domain, and the configuration of the RO is repeated at a certain period in the time domain in a radio frame. As shown in Figure 1, it is a schematic diagram of repeatedly configuring ROs in the time domain according to a certain period. In Figure 1, each block is an RO, and there are two subframes in one wireless frame (for example, for the case of SCS=15KHz) There are ROs configured on the frequency domain, and there are 4 ROs in the frequency domain. This configuration is repeated at a period of one radio frame.

In related technologies, when a new random access trigger reason is introduced, the following two methods are generally used to configure corresponding random access radio resources:

One is to configure additional random access radio resources different from the original random access radio resources;

The other is to share part of the original random access radio resources. Assuming that the number of ROs associated with an SSB on a certain carrier is greater than 1, there are three current sharing methods:

Share a certain RO;

Share even ROs;

Odd ROs are shared.

Exemplarily, as shown in FIG. 2, it is a schematic diagram of an association relationship between RO and SSB. There are two synchronization signal blocks (Synchronization Signal Block, SSB) associated with RO, namely SSB1 and SSB2, and each SSB is associated with There are 4 ROs, so according to the existing sharing method, the serial numbers of the ROs that can be shared can be {1}, {2}, {3}, {4}, {1,3}, {2,4}. When the SSB associated with an RO is greater than or equal to 1, there is only one RO sharing method, that is, either all ROs can be shared, or all ROs cannot be shared.

According to the provisions of the existing standard protocol, the sequence of association between SSB and RO includes:

(1) Increment according to the increment of preamble index in the same RO;

(2) In the same time domain, it increases from low to high according to the location of the frequency domain;

(3) Increment in the order of RO in the time domain within a Physical Random Access Channel (PRACH) time slot;

(4) Increment between different PRACH time slots.

The PRACH time slot refers to the time slot containing the previous RO. In the existing 5G NR standard specification, the number of ROs that an SSB can be associated with is 1, 2, 4 and 8. And the SSBs associated with one RO can be 1, 2, 4, 8 and 16, that is, a preamble is assigned to each SSB in one RO. The above-mentioned association relationship between SSB and RO can be carried out according to the SSB cycle actually sent in the half frame, that is, according to the SSB sequence number from small to large, it is associated with RO in turn, and after the SSB with the largest sequence number ends, then start the association between the SSB with the smallest sequence number and RO. By analogy, all the ROs associated with an SSB in such an SSB cycle may be called an SSB-associated RO set.

When the 2-step RACH process is introduced into the 5G NR system, the aforementioned method can be used to share the original random access radio resources originally reserved for the 4-step RACH. In the shared RO, a section of preamble can be allocated in the originally reserved preamble as the random access radio resource of 2-step RACH.

The current 2-step RACH sharing RO method and the method of determining the preamble range can be applied to the 2-step RACH random access method. However, when a new preamble range is introduced to indicate new random access conditions, further division needs to be made in the existing reserved preamble so that the network can distinguish these new random access trigger conditions. The problem brought about by this is that as the number of newly introduced random access trigger conditions continues to increase, it is limited by the limited preamble range (there are 64 preambles in one RO), so the preamble corresponding to each random access condition The range will be small, leading to an increased probability of random access collisions. To a certain extent, network devices need to increase random access resources in order to maintain an appropriate random access collision probability. However, the random access resources of the system are limited by uplink spectrum resources and cannot be excessively increased, so a new solution is required.

Based on the above problems, the present invention provides a method for reporting random access conditions, in which a terminal device can send a first Physical Uplink Shared Channel (PUSCH) to a network device; if the first PUSCH carries a random access If the random access condition information is used, the random access condition information is used to indicate the reason for triggering the random access; wherein, the first PUSCH is associated with the first preamble signal. Through this solution, the terminal device can carry the random access condition information in the first PUSCH associated with the first preamble information. Compared with indicating the random access condition through the preamble, the terminal device is not limited by the range of the preamble, and does not need to be in the existing Further division is made in the reserved preamble, which can reduce the random access collision probability.

The embodiments of the present application describe various embodiments in conjunction with network equipment and terminal equipment, wherein the terminal equipment may also be referred to as user equipment (User Equipment, UE), access terminal, user unit, user station, mobile station, mobile station, remote station, remote terminal, mobile device, user terminal, terminal, wireless communication device, user agent or user device, etc.

The terminal device can be a station (STAION, ST) in the WLAN, a cellular phone, a cordless phone, a Session Initiation Protocol (Session Initiation Protocol, SIP) phone, a wireless local loop (Wireless Local Loop, WLL) station, a personal digital processing (Personal Digital Assistant, PDA) devices, handheld devices with wireless communication functions, computing devices or other processing devices connected to wireless modems, vehicle-mounted devices, wearable devices, next-generation communication systems such as terminal devices in NR networks, or future Terminal equipment in the evolved public land mobile network (Public Land Mobile Network, PLMN) network, etc.

In the embodiment of this application, the terminal device can be deployed on land, including indoor or outdoor, handheld, wearable or vehicle-mounted; it can also be deployed on water (such as ships, etc.); it can also be deployed in the air (such as aircraft, balloons and satellites) superior).

In this embodiment of the application, the terminal device may be a mobile phone (Mobile Phone), a tablet computer (Pad), a computer with a wireless transceiver function, a virtual reality (Virtual Reality, VR) terminal device, an augmented reality (Augmented Reality, AR) terminal Equipment, wireless terminal equipment in industrial control, wireless terminal equipment in self driving, wireless terminal equipment in remote medical, wireless terminal equipment in smart grid , wireless terminal equipment in transportation safety, wireless terminal equipment in smart city, or wireless terminal equipment in smart home.

As an example but not a limitation, in this embodiment of the present application, the terminal device may also be a wearable device. Wearable devices can also be called wearable smart devices, which is a general term for the application of wearable technology to intelligently design daily wear and develop wearable devices, such as glasses, gloves, watches, clothing and shoes. A wearable device is a portable device that is worn directly on the body or integrated into the user's clothing or accessories. Wearable devices are not only a hardware device, but also achieve powerful functions through software support, data interaction, and cloud interaction. Generalized wearable smart devices include full-featured, large-sized, complete or partial functions without relying on smart phones, such as smart watches or smart glasses, etc., and only focus on a certain type of application functions, and need to cooperate with other devices such as smart phones Use, such as various smart bracelets and smart jewelry for physical sign monitoring.

Wherein, the network equipment may further include access network equipment and core network equipment. That is, the wireless communication system also includes multiple core networks for communicating with access network devices. The access network device may be a long-term evolution (long-term evolution, LTE) system, a next-generation (mobile communication system) (next radio, NR) system or an authorized auxiliary access long-term evolution (LAA- Evolved base station (evolutional node B, abbreviated as eNB or e-NodeB) macro base station, micro base station (also called "small base station"), pico base station, access point (access point, AP), Transmission point (transmission point, TP) or new generation base station (new generation Node B, gNodeB), etc.

In the embodiment of the present application, the network device may be a device for communicating with the mobile device, and the network device may be an access point (Access Point, AP) in WLAN, a base station (Base Transceiver Station, BTS) in GSM or CDMA , or a base station (NodeB, NB) in WCDMA, or an evolved base station (Evolutional Node B, eNB or eNodeB) in LTE, or a relay station or access point, or a vehicle-mounted device, a wearable device, and an NR network The network equipment (gNB) in the network or the network equipment in the future evolved PLMN network or the network equipment in the NTN network, etc.

As an example but not a limitation, in this embodiment of the present application, the network device may have a mobile feature, for example, the network device may be a mobile device. Optionally, the network equipment may be a satellite or a balloon station. For example, the satellite can be a low earth orbit (low earth orbit, LEO) satellite, a medium earth orbit (medium earth orbit, MEO) satellite, a geosynchronous earth orbit (geosynchronous earth orbit, GEO) satellite, a high elliptical orbit (High Elliptical Orbit, HEO) satellite. ) Satellite etc. Optionally, the network device may also be a base station installed on land, water, and other locations.

In this embodiment of the present application, the network device may provide services for a cell, and the terminal device communicates with the network device through the transmission resources (for example, frequency domain resources, or spectrum resources) used by the cell, and the cell may be a network device ( For example, a cell corresponding to a base station), the cell may belong to a macro base station, or may belong to a base station corresponding to a small cell (Small cell), and the small cell here may include: a metro cell (Metro cell), a micro cell (Micro cell), a pico cell ( Pico cell), Femto cell, etc. These small cells have the characteristics of small coverage and low transmission power, and are suitable for providing high-speed data transmission services.

Fig. 3 is a schematic structural diagram of a communication system applied in an embodiment of the present invention, the communication system may include network equipment and terminal equipment with communication functions, and the implementation of the present invention can be realized through the interaction between the network equipment and the terminal equipment The method for reporting the random access conditions provided in the example.

The technical solution of the embodiment of the present application can be applied to various communication systems, such as: Global System of Mobile communication (Global System of Mobile communication, GSM) system, code division multiple access (Code Division Multiple Access, CDMA) system, broadband code division multiple access (Wideband Code Division Multiple Access, WCDMA) system, General Packet Radio Service (GPRS), Long Term Evolution (LTE) system, Advanced long term evolution (LTE-A) system , New Radio (NR) system, evolution system of NR system, LTE (LTE-based access to unlicensed spectrum, LTE-U) system on unlicensed spectrum, NR (NR-based access to unlicensed spectrum) on unlicensed spectrum unlicensed spectrum (NR-U) system, Non-Terrestrial Networks (NTN) system, Universal Mobile Telecommunications System (UMTS), Wireless Local Area Networks (WLAN), Wireless Fidelity (Wireless Fidelity, WiFi), fifth-generation communication (5th-Generation, 5G) system or other communication systems, etc.

Generally speaking, the number of connections supported by traditional communication systems is limited and easy to implement. However, with the development of communication technology, mobile communication systems will not only support traditional communication, but also support, for example, Device to Device (Device to Device, D2D) communication, Machine to Machine (M2M) communication, Machine Type Communication (MTC), Vehicle to Vehicle (V2V) communication, or Vehicle to everything (V2X) communication, etc. , the embodiments of the present application may also be applied to these communication systems.

The communication system in the embodiment of the present application may be applied to a carrier aggregation (Carrier Aggregation, CA) scenario, may also be applied to a dual connectivity (Dual Connectivity, DC) scenario, and may also be applied to an independent (Standalone, SA) network deployment scenario.

Optionally, the communication system in the embodiment of the present application may be applied to an unlicensed spectrum, where the unlicensed spectrum may also be considered as a shared spectrum; or, the communication system in the embodiment of the present application may also be applied to a licensed spectrum, where, Licensed spectrum can also be considered as non-shared spectrum.

Optionally, the embodiment of the present application may be applied to a non-terrestrial communication network (Non-Terrestrial Networks, NTN) system, and may also be applied to a terrestrial communication network (Terrestrial Networks, TN) system.

It should be understood that the terms "system" and "network" are often used interchangeably herein. The term "and/or" in this article is just an association relationship describing associated objects, which means that there can be three relationships, for example, A and/or B can mean: A exists alone, A and B exist simultaneously, and there exists alone B these three situations. In addition, the character "/" in this article generally indicates that the contextual objects are an "or" relationship.

It should be understood that the "indication" mentioned in the embodiments of the present application may be a direct indication, may also be an indirect indication, and may also mean that there is an association relationship. For example, A indicates B, which can mean that A directly indicates B, for example, B can be obtained through A; it can also indicate that A indirectly indicates B, for example, A indicates C, and B can be obtained through C; it can also indicate that there is an association between A and B relation.

In the description of the embodiments of the present application, the term "corresponding" may indicate that there is a direct or indirect correspondence between the two, or that there is an association between the two, or that it indicates and is indicated, configuration and is configuration etc.

Optionally, the indication information in this embodiment of the present application includes physical layer signaling. For example, at least one of downlink control information (Downlink Control Information, DCI), radio resource control (Radio Resource Control, RRC) signaling, and media access control element (Media Access Control Control Element, MAC CE).

Optionally, the high-level parameters or high-level signaling in the embodiment of the present application include at least one of radio resource control (Radio Resource Control, RRC) signaling and media access control element (Media Access Control Control Element, MAC CE) kind.

The technical solutions of the present invention are further described below in the form of embodiments, and the embodiments of the present application include part or all of the following contents:

As shown in FIG. 4, it is a schematic flowchart of a method for reporting a random access condition provided by an embodiment of the present invention, and the method includes:

401. A terminal device sends a first preamble signal to a network device.

402. The terminal device sends the first PUSCH associated with the first preamble signal to the network device.

Optionally, the above-mentioned first preamble signal is a preamble signal corresponding to a 2-step RACH process.

Optionally, the above-mentioned first preamble signal is a preamble signal corresponding to a 4-step RACH process.

Optionally, the foregoing first preamble may also be a corresponding preamble in other random access procedures.

Optionally, when the first preamble signal is a preamble signal corresponding to the two-step random access process, the above-mentioned first preamble signal and the above-mentioned first PUSCH are carried in message A (ie, Message A) in the 2-step RACH process .

That is to say, the terminal device sends Message A to the network device, including performing the above 401 and 402. Message A consists of two parts, a preamble (ie, the first preamble signal) and a PUSCH resource block associated with the preamble (ie, the first PUSCH). When the terminal device triggers the 2-step RACH process, the selection and transmission of the preamble and PUSCH in message A can follow the existing method, but the random access condition information can be added in the PUSCH resource block, the random access condition information Information about the trigger conditions for the terminal device to initiate random access.

Regarding whether the above-mentioned first PUSCH carries random access condition information; there may be the following two situations:

Case 1: Random access condition information is carried in the first PUSCH;

(1) Random access condition information is carried in the first PUSCH, and the random access condition information is used to indicate the reason for triggering random access;

(2) Random access condition information is carried in the first PUSCH, and the random access condition information is used to indicate the reason for triggering random access without distinguishing.

Optionally, carrying random access condition information in the first PUSCH includes but is not limited to the following implementations:

Implementation mode 1: The random access condition information is carried in the medium access control MAC protocol data unit PDU.

Optionally, the random access condition information may be indicated by bits in a new MAC control element CE in a MAC protocol data unit (Protocol Data Unit, PDU).

Optionally, the random access condition information may be indicated through the reserved bits in the existing MAC CE in the MAC PDU.

Implementation mode 2: Carry random access condition information in RRC signaling.

Case 2: The random access condition information is not carried in the first PUSCH.

If the random access condition information is not carried in the first PUSCH, the first PUSCH indication does not distinguish the reason for triggering the random access.

Optionally, the above reasons for triggering random access include but are not limited to at least one of the following reasons (A), (B), (C) and (D):

(A), the terminal device transmits a small data packet (small data transmission, SDT) in an inactive state.

(B), the terminal device requests coverage enhancement (Coverage enhancement);

(C), the terminal device is a reduced capability UE (reduced capability UE, Redcap UE);

(D) The terminal device triggers at least one network slicing (Slicing) for random access.

Optionally, the random access condition information includes a first indication field, and the value of the first indication field is used to indicate that the reason for triggering the random access is a target cause in at least one cause.

Optionally, the value of the first indication field includes the first value and/or the second value;

Wherein, the first value is used to indicate that the reason for triggering the random access condition is a target cause in at least one cause, and the second value is used for indicating that the reason for triggering the random access condition is not differentiated.

Optionally, the random access condition information includes at least one bit; the number of bits of the at least one bit is determined according to the number of network slice groups and/or the number of network slices.

Optionally, the random access condition information includes at least one bit; the value of the at least one bit includes: a first indication value and a second indication value;

The first indication value is used to indicate the reason;

The second indication value is used to indicate that the reason for triggering the random access is not distinguished.

The first indication value is used to indicate at least one network slice to which the terminal device triggers random access;

The second indication value is used to indicate that the network slice triggering random cut-in is not distinguished from the terminal device;

Wherein, the number of bits of at least one bit is determined according to the number of network slice groups and/or the number of network slices.

Further, according to different reasons for triggering random access indicated by the random access condition information, the random access condition information may be indicated in different ways, including but not limited to the following implementation methods:

Mode 1: A reason for triggering random access is indicated by a first indication value of one bit;

Mode 2: Indicating the cause of random access triggering without distinguishing through a first indication value of one bit.

Optionally, the first indication value is 0, or the second indication value is 1, or the first indication value is 1, and the second indication value is 0.

When there is only one random access reason contained in the random access condition information, one bit can be used to distinguish the reason, for example, one bit can be used for the above reasons (A), (B) and (C) instruct.

Exemplarily, when the value of a certain bit is 1, one cause corresponding to the certain bit can be indicated, and when the value of the certain bit is 0, it can indicate that the 1 reason corresponding to a certain bit.

Mode 3: Instruct the terminal device to trigger at least one network slice for random access by using at least one bit;

Mode 4: Use at least one bit to indicate that the terminal device does not distinguish the network slice that triggers random access;

Since there may be multiple network slices or network slice groups, when specifying a certain network slice or network slice group, at least one bit may be used for indication.

Wherein, the number of bits of at least one bit can be determined according to the number of network slice groups, the number of bits of at least one bit can also be determined according to the number of network slices, and the number of bits of at least one bit can also be determined according to the number of network slice groups, and The number of network slices is determined.

Mode 5: Multiple reasons for triggering random access are indicated through corresponding multiple sets of bit information;

Mode 6: Indicate multiple reasons for triggering random access without distinguishing through corresponding multiple sets of bit information;

Wherein, each group of bit information corresponds to a cause, and each group of bit information includes at least one bit.

Manner 7: The random access condition information is index information, and the index information corresponds to at least one cause.

When there are more than one random access reasons included in the random access condition information, the random access condition information can be indicated by independent encoding or joint encoding. The independent encoding refers to the use of independent information Bits to indicate the trigger reason, corresponding to the above-mentioned mode 5 and mode 6. The method of joint coding refers to other coding methods except independent coding, for example, using an index number to index a specific combination, which corresponds to the above-mentioned method 7. The following are examples of the independent encoding method and the joint encoding method:

How to encode independently:

Assume that random access reasons A, B and C require a bit, b bit and c bit respectively to distinguish different situations. Then when any 2 or 3 reasons need to be combined together, the independent encoding method uses a bit, b bit and c bit to independently represent random access reasons A, B and C. Wherein, when the value of bit a is 1, it indicates random access reason A; when the value of bit b is 1, it indicates random access reason B; when the value of bit c is 1, it indicates random access reason C. As shown in Table 1 below, it is a specific indication manner of indicating random access condition information through an independent coding manner.

随机接入条件信息\比特Random access condition information\bit	a比特a bit	b比特b bit	c比特c bit
无需区分No need to distinguish	00	00	00
AA	11	00	00
BB	00	11	00

A+BA+B	11	11	00
CC	00	00	11
A+CA+C	11	00	11
B+CB+C	00	11	11
A+B+CA+B+C	11	11	11

Table 1

Wherein, in Table 1, when a bit, b bit and c bit are all 0, it means that there is no need to distinguish random access reasons A, B and C.

Joint encoding method:

The way of joint encoding generally needs to encode the combination of reasons, and the corresponding index can be set for different random access condition information, as shown in Table 2, the last three types in Table 2 (ie A+C, B+C and A +B+C) combination, if you do not input a reasonable combination method, you don’t need to express it, and reserve it to facilitate subsequent expansion and save bits corresponding to unreasonable combination methods.

随机接入条件信息Random access condition information	联合编码joint coding
无需区分No need to distinguish	00
AA	11
BB	22
A+BA+B	33
CC	44
A+CA+C	预留reserve
B+CB+C	预留reserve
A+B+CA+B+C	预留reserve

Table 2

The situation that does not need to be distinguished can be represented by at least one bit (code point), or can be represented by whether the random access condition information exists, that is, the random access condition information is not carried in the first PUSCH.

403. The network device sends a random access response message to the terminal device.

In the 2-step RACH process, the above 403 may be a message B (ie, Message B) sent by the network device to the terminal device.

When the method for reporting the above random access conditions is applied in the 2-step RACH process, there are the following advantages:

(1) In addition to carrying random access trigger condition information, all processes of the existing 2-step RACH can be reused;

(2) Existing 2-step RACH radio resources can be reused, that is, no new 2-step RACH radio resources need to be added;

(3) There is no need to further divide the 2-step RACH radio resources, so that the random access collision probability will not be increased.

The present invention provides a method for reporting random access conditions. In the method, a terminal device can send a first PUSCH to a network device; the first PUSCH carries random access condition information, and the random access condition information is used to indicate triggering random access at least one reason; wherein, the first PUSCH is associated with the first preamble signal. Through this solution, the terminal device can carry the random access condition information in the first PUSCH associated with the first preamble, compared with indicating the random access condition through the preamble, without being limited by the range of the preamble, and does not need to Further division is made in the reserved preamble, which can reduce the probability of random access collisions.

As shown in Figure 5, an embodiment of the present invention provides a terminal device, including:

A sending module 501, configured to send a first physical uplink shared channel PUSCH to a network device;

Random access condition information is carried in the first PUSCH, and the random access condition information is used to indicate a reason for triggering random access;

Wherein, the first PUSCH is associated with the first preamble signal.

Optionally, the random access condition information is also used to indicate that the reason for triggering the random access is not distinguished.

Optionally, if the random access condition information is not carried in the first PUSCH, the first PUSCH indication does not distinguish the reason for triggering the random access.

Optionally, the reasons for triggering random access include at least one of the following reasons:

The terminal device transmits small data packets in the inactive state;

The terminal device requests coverage enhancement;

The terminal equipment is a simplified terminal;

The terminal device triggers random access to at least one network slice.

The first indication value is used to indicate the reason;

Optionally, the random access condition information is index information, and the index information corresponds to at least one cause.

Optionally, carrying random access condition information in the MAC PDU;

Optionally, the random access condition information is carried in the RRC signaling.

Optionally, indicate the random access condition information through the bits in the new MAC CE in the MAC PDU;

Optionally, the random access condition information is indicated through the reserved bits in the existing MAC CE in the MAC PDU.

Optionally, the sending module 501 is also used for:

Send the first preamble signal to the network device.

Optionally, the first preamble signal is a preamble signal corresponding to a two-step random access procedure.

Optionally, the first preamble signal and the first PUSCH are carried in message A in the two-step random access process.

As shown in FIG. 6, an embodiment of the present invention provides a network device, including:

A receiving module 601, configured to receive the first PUSCH sent by the terminal device;

Wherein, the first PUSCH is associated with the first preamble signal.

Optionally, the random access condition information may also be used to indicate that the reason for triggering the random access is not distinguished.

Optionally, if the first PUSCH does not carry random access condition information, the first PUSCH indication does not distinguish the reason for triggering the random access.

The terminal device transmits small data packets in the inactive state;

The terminal device requests coverage enhancement;

The terminal equipment is a simplified terminal;

The terminal device triggers random access to at least one network slice.

The first indication value is used to indicate the reason;

Optionally, carrying random access condition information in the MAC PDU;

Wherein, the random access condition information is indicated by bits in the new MAC CE in the MAC PDU;

or,

The random access condition information is indicated by the reserved bits in the existing MAC CE in the MAC PDU.

Optionally, the receiving module 601 is further configured to receive the first preamble signal sent by the terminal device.

An embodiment of the present invention also provides a terminal device, including: a memory storing executable program codes;

a processor coupled to the memory;

The processor invokes the executable program code stored in the memory to execute the method for reporting the random access condition performed by the terminal device in the embodiment of the present invention.

The embodiment of the present invention also provides a network device, including: a memory storing executable program codes;

a processor coupled to the memory;

The processor invokes the executable program code stored in the memory to execute the method for reporting the random access condition performed by the network device in the embodiment of the present invention.

Exemplarily, as shown in FIG. 7, the network device in the embodiment of the present invention may be a base station, and the base station includes: a receiver 701, a transmitter 702, and a processor 703;

A receiver 701, configured to receive the first PUSCH sent by the terminal device;

Random access condition information is carried in the first PUSCH, and the random access condition information is used to indicate at least one reason for triggering random access;

Wherein, the first PUSCH is associated with the first preamble signal.

Optionally, the random access condition information is used to indicate that the reason for triggering the random access is not distinguished.

Optionally, the reasons for triggering random access include at least one of the following reasons: the terminal device transmits small data packets in an inactive state;

The terminal device requests coverage enhancement;

The terminal equipment is a simplified terminal;

The terminal device triggers random access to at least one network slice.

The first indication value is used to indicate the reason;

Optionally, carrying random access condition information in the MAC PDU;

or,

Optionally, the receiver 701 is further configured to receive the first preamble signal sent by the terminal device.

FIG. 8 is a schematic diagram of a hardware structure of a terminal device provided by an embodiment of the present invention. The terminal device may include: a radio frequency (radio frequency, RF) circuit 810, a memory 820, a processor 830 and other components. Wherein, the radio frequency circuit 810 includes a receiver 811 and a transmitter 812 . Those skilled in the art can understand that the structure of the terminal device shown in FIG. 8 does not constitute a limitation on the terminal device, and may include more or less components than those shown in the illustration, or combine certain components, or arrange different components. .

The RF circuit 810 can be used for sending and receiving information or receiving and sending signals during a call. In particular, after receiving the downlink information from the base station, it is processed by the processor 830; in addition, the designed uplink data is sent to the base station. Generally, the RF circuit 810 includes, but is not limited to, an antenna, at least one amplifier, a transceiver, a coupler, a low noise amplifier (low noise amplifier, LNA), a duplexer, and the like. In addition, RF circuitry 810 may also communicate with networks and other devices via wireless communications. The above wireless communication can use any communication standard or protocol, including but not limited to global system of mobile communication (global system of mobile communication, GSM), general packet radio service (general packet radio service, GPRS), code division multiple access (code division multiple access) multiple access (CDMA), wideband code division multiple access (WCDMA), long term evolution (LTE), e-mail, short message service (short messaging service, SMS), etc.

The memory 820 can be used to store software programs and modules, and the processor 830 executes various functional applications and data processing of the terminal device by running the software programs and modules stored in the memory 820 . The memory 820 can mainly include a program storage area and a data storage area, wherein the program storage area can store an operating system, at least one application program required by a function (such as a sound playback function, an image playback function, etc.); Data created by the use of terminal equipment (such as audio data, phonebook, etc.), etc. In addition, the memory 820 may include a high-speed random access memory, and may also include a non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other volatile solid-state storage devices.

The processor 830 is the control center, connects various parts of the entire terminal equipment with various interfaces and lines, runs or executes software programs and/or modules stored in the memory 820, and invokes data stored in the memory 820 to execute Various functions and processing data of the terminal equipment, so as to monitor the terminal equipment as a whole. Optionally, the processor 830 may include one or more processing units; preferably, the processor 830 may integrate an application processor and a modem processor, wherein the application processor mainly processes the operating system, user interface and application programs, etc. , the modem processor mainly handles wireless communications. It can be understood that the foregoing modem processor may not be integrated into the processor 830 .

In the embodiment of the present invention, the transmitter 812 is configured to send the first physical uplink shared channel PUSCH to the network device;

If random access condition information is carried in the first PUSCH, the random access condition information is used to indicate at least one reason for triggering random access;

Wherein, the first PUSCH is associated with the first preamble signal.

The terminal device transmits small data packets in the inactive state;

The terminal device requests coverage enhancement;

The terminal equipment is a simplified terminal;

The terminal device triggers random access to at least one network slice.

The first indication value is used to indicate the reason;

Optionally, the random access condition information is carried in the medium access control MAC protocol data unit PDU;

Optionally, the random access condition information is indicated by bits in the new MAC control element CE in the MAC PDU;

Optionally, the transmitter 812 is also used for:

Send the first preamble signal to the network device.

An embodiment of the present invention also provides a computer-readable storage medium, including: computer instructions, which, when run on a computer, cause a processor to execute various processes of the terminal device in the foregoing method embodiments.

An embodiment of the present invention also provides a computer-readable storage medium, including: computer instructions, which, when run on a computer, cause a processor to execute various processes of the network device in the foregoing method embodiments.

An embodiment of the present invention also provides a computer program product, including computer instructions. When the computer program product runs on the computer, the processor executes the computer instructions, so that the processor executes various processes of the terminal device in the above method embodiments.

The embodiment of the present invention also provides a computer program product, including computer instructions. When the computer program product runs on the computer, the processor executes the computer instructions, so that the processor executes various processes of the network device in the above method embodiments.

The embodiment of the present invention also provides a chip, the chip is coupled with the memory in the terminal device, so that the chip calls the program instructions stored in the memory during operation, so that the terminal device executes various processes of the terminal device in the above method embodiments.

The embodiment of the present invention also provides a chip, the chip is coupled with the memory in the network device, so that the chip calls the program instructions stored in the memory during operation, so that the network device executes various processes of the network device in the above method embodiments.

In the above embodiments, all or part of them may be implemented by software, hardware, firmware or any combination thereof. When implemented using software, it may be implemented in whole or in part in the form of a computer program product. A computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on the computer, the processes or functions according to the embodiments of the present invention are produced in whole or in part. A computer can be a general purpose computer, special purpose computer, computer network, or other programmable device. Computer instructions may be stored in or transmitted from one computer-readable storage medium to another computer-readable storage medium, e.g. Coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (such as infrared, wireless, microwave, etc.) to another website site, computer, server or data center. The computer-readable storage medium may be any available medium that can be stored by a computer, or a data storage device such as a server, a data center, etc. integrated with one or more available media. Available media may be magnetic media (eg, floppy disk, hard disk, magnetic tape), optical media (eg, DVD), or semiconductor media (eg, Solid State Disk (SSD)).

The terms "first", "second", "third", "fourth", etc. (if any) in the description and claims of the present invention and the above drawings are used to distinguish similar objects, and not necessarily Used to describe a specific sequence or sequence. It is to be understood that the terms so used are interchangeable under appropriate circumstances such that the embodiments described herein can be practiced in sequences other than those illustrated or described herein. Furthermore, the terms "comprising" and "having", as well as any variations thereof, are intended to cover a non-exclusive inclusion, for example, a process, method, system, product or device comprising a sequence of steps or elements is not necessarily limited to the expressly listed instead, may include other steps or elements not explicitly listed or inherent to the process, method, product or apparatus.

Claims

A method for reporting random access conditions, characterized in that it is applied to terminal equipment, including:

sending the first physical uplink shared channel PUSCH to the network device;

The first PUSCH carries random access condition information, and the random access condition information is used to indicate the reason for triggering random access;

Wherein, the first PUSCH is associated with a first preamble signal.
The method according to claim 1, wherein the reason for indicating the random access trigger includes at least one of the following reasons:

The terminal device transmits small data packets in an inactive state;

The terminal device requests coverage enhancement;

The terminal equipment is a simple configuration terminal;

The terminal device triggers random access to at least one network slice.
The method according to claim 2, characterized in that,

The random access condition information includes a first indication field, and a value of the first indication field is used to indicate that the reason for triggering random access is a target reason in the at least one reason.
The method according to claim 3, characterized in that,

The value of the first indication field includes a first value and/or a second value;

Wherein, the first value is used to indicate that the reason for triggering the random access condition is the target reason in the at least one reason, and the second value is used to indicate the reason for triggering the random access condition No distinction is made.
The method according to claim 3 or 4, wherein the random access condition information includes at least one bit; the number of bits of the at least one bit is based on the number of network slice groups, and/or network slices The number is determined.
The method according to any one of claims 1 to 5, characterized in that,

The random access condition information is index information, and the index information corresponds to the at least one reason.
The method according to any one of claims 1 to 6, characterized in that,

Carrying the random access condition information in a medium access control MAC protocol data unit PDU;

or,

Carry the random access condition information in RRC signaling.
The method according to claim 7, characterized in that,

indicating the random access condition information through a bit in a new MAC control element CE in the MAC PDU;

or,

Indicating the random access condition information through the reserved bits in the existing MAC CE in the MAC PDU.
The method according to any one of claims 1 to 8, characterized in that the method comprises:

Send the first preamble signal to the network device.
The method according to any one of claims 1 to 9, characterized in that,

The first preamble is a preamble corresponding to a two-step random access procedure.
The method according to claim 10, wherein the first preamble signal and the first PUSCH are carried in message A in the two-step random access process.
The method according to any one of claims 1 to 11, wherein if the random access condition information is not carried in the first PUSCH, the first PUSCH is used to indicate the trigger random access Causes are not differentiated.
A method for reporting random access conditions, characterized in that it is applied to network equipment, including:

receiving the first PUSCH sent by the terminal device;

The first PUSCH carries random access condition information, and the random access condition information is used to indicate the reason for triggering random access;

Wherein, the first PUSCH is associated with a first preamble signal.
The method according to claim 13, characterized in that the reasons for triggering the random access indication include at least one of the following reasons:

The terminal device transmits small data packets in an inactive state;

The terminal device requests coverage enhancement;

The terminal equipment is a simple configuration terminal;

The terminal device triggers random access to at least one network slice.
The method according to claim 14, characterized in that,

The random access condition information includes a first indication field, and a value of the first indication field is used to indicate that the reason for triggering random access is a target reason in the at least one reason.
The method according to any one of claim 15, characterized in that,

The value of the first indication field includes a first value and/or a second value;

Wherein, the first value is used to indicate that the reason for triggering the random access condition is the target reason in the at least one reason, and the second value is used to indicate the reason for triggering the random access condition No distinction is made.
The method according to claim 15 or 16, characterized in that,

The random access condition information includes at least one bit; the number of bits of the at least one bit is determined according to the number of network slice groups and/or the number of network slices.
The method according to any one of claims 13 to 17, characterized in that,

The random access condition information is index information, and the index information corresponds to the at least one reason.
A method according to any one of claims 13 to 18, wherein,

carrying the random access condition information in the MAC PDU;

or,

Carry the random access condition information in RRC signaling.
The method of claim 19, wherein,

Indicating the random access condition information through bits in the new MAC CE in the MAC PDU;

or,

Indicating the random access condition information through the reserved bits in the existing MAC CE in the MAC PDU.
The method according to any one of claims 13 to 20, wherein the method comprises:

Receive the first preamble signal sent by the terminal device.
The method according to any one of claims 13 to 21, wherein,

The first preamble is a preamble corresponding to a two-step random access procedure.
The method according to claim 22, wherein the first preamble signal and the first PUSCH are carried in message A in the two-step random access process.
The method according to any one of claims 13 to 23, wherein if the random access condition information is not carried in the first PUSCH, the first PUSCH is used to indicate the trigger random access Causes are not differentiated.
A terminal device, characterized in that it includes:

A transmitter, configured to send a first PUSCH to a network device;

The first PUSCH carries random access condition information, and the random access condition information is used to indicate the reason for triggering random access;

Wherein, the first PUSCH is associated with a first preamble signal.
The terminal device according to claim 25, wherein the reasons for indicating that random access is triggered include at least one of the following reasons:

The terminal device transmits small data packets in an inactive state;

The terminal device requests coverage enhancement;

The terminal equipment is a simple configuration terminal;

The terminal device triggers random access to at least one network slice.
The terminal device according to claim 26, characterized in that,

The random access condition information includes a first indication field, and a value of the first indication field is used to indicate that the reason for triggering random access is a target reason in the at least one reason.
The terminal device according to claim 27, characterized in that,

The value of the first indication field includes a first value and/or a second value;

Wherein, the first value is used to indicate that the reason for triggering the random access condition is the target reason in the at least one reason, and the second value is used to indicate the reason for triggering the random access condition No distinction is made.
The terminal device according to claim 27 or 28, characterized in that,

The random access condition information includes at least one bit; the number of bits of the at least one bit is determined according to the number of network slice groups and/or the number of network slices.
The terminal device according to any one of claims 25 to 29, characterized in that,

The random access condition information is index information, and the index information corresponds to the at least one reason.
The terminal device according to any one of claims 25 to 30, characterized in that,

Carrying the random access condition information in a medium access control MAC protocol data unit PDU;

or,

Carry the random access condition information in RRC signaling.
The terminal device according to claim 31, characterized in that,

indicating the random access condition information through a bit in a new MAC control element CE in the MAC PDU;

or,

Indicating the random access condition information through the reserved bits in the existing MAC CE in the MAC PDU.
The terminal device according to any one of claims 25 to 32, wherein the transmitter is used for:

Send the first preamble signal to the network device.
The terminal device according to any one of claims 23 to 33, characterized in that,

The first preamble is a preamble corresponding to a two-step random access procedure.
The terminal device according to claim 34, wherein the first preamble signal and the first PUSCH are carried in message A in the two-step random access process.
The terminal device according to any one of claims 25 to 35, wherein if the random access condition information is not carried in the first PUSCH, the first PUSCH is used to indicate that the triggered random access reasons are not differentiated.
A network device, characterized in that it includes:

a receiver, configured to receive the first PUSCH sent by the terminal device;

The first PUSCH carries random access condition information, and the random access condition information is used to indicate a reason for triggering random access. The first PUSCH is associated with a first preamble signal.
The network device according to claim 37, characterized in that,

The reasons for triggering random access include at least one of the following reasons:

The terminal device transmits small data packets in an inactive state;

The terminal device requests coverage enhancement;

The terminal equipment is a simple configuration terminal;

The terminal device triggers random access to at least one network slice.
The network device according to claim 38, characterized in that,

The random access condition information includes a first indication field, and a value of the first indication field is used to indicate that the reason for triggering random access is a target reason in the at least one reason.
The network device according to claim 39, characterized in that,

The value of the first indication field includes a first value and/or a second value;

Wherein, the first value is used to indicate that the reason for triggering the random access condition is the target reason in the at least one reason, and the second value is used to indicate the reason for triggering the random access condition No distinction is made.
The network device according to claim 39 or 40, characterized in that,

The random access condition information includes at least one bit; the number of bits of the at least one bit is determined according to the number of network slice groups and/or the number of network slices.
The network device according to any one of claims 37 to 41, wherein the random access condition information is index information, and the index information corresponds to the at least one cause.
The network device according to any one of claims 37 to 42, wherein the random access condition information is carried in a MAC PDU;

or,

Carry the random access condition information in RRC signaling.
The network device according to claim 43, characterized in that,

Indicating the random access condition information through bits in the new MAC CE in the MAC PDU;

or,

Indicating the random access condition information through the reserved bits in the existing MAC CE in the MAC PDU.
The network device according to any one of claims 37 to 44, characterized in that,

The receiver is further configured to receive the first preamble signal sent by the terminal device.
The network device according to any one of claims 37 to 45, characterized in that,

The first preamble is a preamble corresponding to a two-step random access procedure.
The network device according to claim 46, wherein the first preamble signal and the first PUSCH are carried in message A in the two-step random access process.
The network device according to any one of claims 37 to 47, characterized in that,

If the first PUSCH does not carry the random access condition information, the first PUSCH is used to indicate the reason for triggering random access without distinction.
A terminal device, characterized in that it includes:

A sending module, configured to send the first physical uplink shared channel PUSCH to the network device;

The first PUSCH carries random access condition information, and the random access condition information is used to indicate a reason for triggering random access. The first PUSCH is associated with a first preamble signal.
A network device, characterized in that it includes:

A receiving module, configured to receive the first PUSCH sent by the terminal device;

The first PUSCH carries random access condition information, and the random access condition information is used to indicate a reason for triggering random access. The first PUSCH is associated with a first preamble signal.
A computer-readable storage medium, comprising: computer instructions, when the computer instructions are run on a computer, causing the processor to execute the method according to any one of claims 1 to 12, or to execute the method according to any one of claims The method described in any one of 13 to 24.