WO2020192729A1 - 随机接入方法以及用户设备 - Google Patents

随机接入方法以及用户设备 Download PDF

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Publication number
WO2020192729A1
WO2020192729A1 PCT/CN2020/081377 CN2020081377W WO2020192729A1 WO 2020192729 A1 WO2020192729 A1 WO 2020192729A1 CN 2020081377 W CN2020081377 W CN 2020081377W WO 2020192729 A1 WO2020192729 A1 WO 2020192729A1
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WO
WIPO (PCT)
Prior art keywords
message
random access
transmission
pusch
grant
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN2020/081377
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English (en)
French (fr)
Inventor
张崇铭
刘仁茂
山田升平
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FG Innovation Co Ltd
Sharp Corp
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FG Innovation Co Ltd
Sharp Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by FG Innovation Co Ltd, Sharp Corp filed Critical FG Innovation Co Ltd
Priority to CA3135063A priority Critical patent/CA3135063A1/en
Priority to EP20778473.7A priority patent/EP3955689A4/en
Priority to US17/598,458 priority patent/US20220191949A1/en
Priority to MX2021011773A priority patent/MX2021011773A/es
Publication of WO2020192729A1 publication Critical patent/WO2020192729A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/08—Non-scheduled access, e.g. ALOHA
    • H04W74/0833—Random access procedures, e.g. with 4-step access
    • H04W74/0841—Random access procedures, e.g. with 4-step access with collision treatment
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/08—Non-scheduled access, e.g. ALOHA
    • H04W74/0833—Random access procedures, e.g. with 4-step access
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/08—Non-scheduled access, e.g. ALOHA
    • H04W74/0866—Non-scheduled access, e.g. ALOHA using a dedicated channel for access
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/08—Non-scheduled access, e.g. ALOHA
    • H04W74/0833—Random access procedures, e.g. with 4-step access
    • H04W74/0836—Random access procedures, e.g. with 4-step access with 2-step access
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W80/00—Wireless network protocols or protocol adaptations to wireless operation
    • H04W80/02—Data link layer protocols

Definitions

  • the present invention relates to the field of wireless communication technology, and more specifically, the present invention relates to a random access method and user equipment.
  • Step random access process (hereinafter, may be abbreviated as: 4-step RA process).
  • 2-step RA process Two-step random access process
  • the UE sends a message A (Message A, MSG A) to the base station, and MSG A includes a preamble sequence and a payload of MSG A (MSG A payload).
  • the UE when the UE obtains the UL grant in the received RAR, the UE obtains the MAC protocol data unit (MAC PDU) for transmission from the multiplexing and assembly entity (Multiplexing and Assembly entity), And save it in the buffer area of message 3.
  • MAC PDU MAC protocol data unit
  • This MAC PDU will be sent to the base station as MSG 3 in the next step 3.
  • the MAC PDU that carries the content equivalent to or the same as MSG 3 will be sent to the base station as MSG A payload, so how does the UE obtain the MSG A for transmission during the above 2-step RA process?
  • the payload is the problem to be solved.
  • the present invention provides a random access method and user equipment.
  • a random access method which includes: a user equipment UE sends a message A to a base station, the message A includes a preamble sequence and the load of the message A; After sending, receive message B of the response message to message A sent by the base station, wherein the preamble sequence is sent on the physical random access channel PRACH, and the load of the message A is packaged into a media access control protocol
  • the data unit MAC PDU is transmitted on the physical uplink shared channel PUSCH.
  • the UE determining the transmission timing that can be used for the message A may include the following situations: the UE determines the PUSCH timing that can be used to transmit the load of the message A; or the UE determines the next An available PRACH opportunity, which is used to transmit the preamble sequence; or the UE has selected one of the preamble sequences and the selected preamble sequence is used for this random access process; or The preamble sequence selected by the UE is associated with the PUSCH or with PUSCH timing.
  • the UE determines the PUSCH timing that can be used for transmission, when the determined PUSCH timing is the PUSCH timing determined by the UE for the first time in this random access process, Alternatively, when the determined PUSCH timing is used for the first transmission of the load of the message A, the UE obtains the MAC PDU for transmission from the multiplexing and assembling entity.
  • the determined PRACH opportunity is the first PRACH opportunity determined by the UE in this random access process
  • the UE obtains the MAC for transmission from the multiplexing and assembling entity PDU.
  • the UE when the UE has selected one of the preamble sequences, when the selected preamble sequence is the preamble sequence selected for the first time in this random access process, or When the PUSCH timing associated with the selected preamble sequence is used for the first transmission of the load of the message A, the UE obtains the MAC PDU for transmission from the multiplexing and assembling entity.
  • the UE instructs the physical layer to send the preamble sequence on a selected PRACH occasion, and when the preamble sequence sent by the UE is used for this random access process, or When the preamble sequence sent by the UE is associated with the PUSCH, or when the PRACH timing for sending the preamble sequence is associated with the PUSCH, the UE obtains the MAC PDU for transmission from the multiplexing and assembling entity .
  • the UE uses the PUSCH timing as an uplink grant UL grant, and processes the UL grant; the UE determines When the next available PRACH opportunity is reached, the UE uses the PUSCH opportunity associated with the PRACH opportunity as an uplink grant UL grant and processes the UL grant; the UE selects a preamble sequence and When the selected preamble sequence is used for this random access procedure, or when the preamble sequence selected by the UE is associated with the PUSCH or PUSCH timing, the UE will be associated with the preamble sequence
  • the PUSCH timing is used as an uplink authorization UL grant, and the UL grant is processed.
  • the UE instructs the multiplexing and assembling entity to include the C-RNTI MAC CE in the subsequent transmission.
  • the UE stores the MAC PDU in a message 3 buffer area or as a buffer area other than the message 3 buffer area, and when the UE receives an uplink grant UL grant, the MAC PDU is stored in the UL grant is used for this random access procedure, or the UL grant is used for the transmission of the load of the message A, or the UL grant is related to this random access procedure, the UE receives Take out the MAC PDU from the stored buffer area and send it. When the UE receives an uplink grant UL grant in the random access response RAR, the UE takes out the MAC PDU from the stored buffer area. send.
  • a user equipment including: a processor; and a memory storing instructions; wherein the instructions execute the random access method according to the context when run by the processor.
  • Fig. 1 is a schematic sequence diagram showing a four-step random access procedure as a kind of random access procedure.
  • Fig. 2 is a schematic sequence diagram showing a two-step random access procedure as a kind of random access procedure.
  • Figure 3 is a detailed sequence diagram showing a four-step random access procedure.
  • FIG. 4 is a detailed sequence diagram showing the two-step random access procedure involved in the present invention.
  • Fig. 5 is a block diagram showing a user equipment UE related to the present invention.
  • FIG. 6 is a diagram showing the correspondence relationship between PRACH timing and PUSCH timing.
  • Fig. 7 is a diagram showing the correspondence between PUSCH timing and preamble sequence.
  • the UE generally includes the following steps when performing a 4-step random access procedure.
  • Step 300 The UE selects random access resources for random access. in this process
  • the UE selects a preamble for transmission, and sets the sequence number corresponding to the selected preamble as the value of the parameter PREAMBLE_INDEX;
  • Step 301 The UE sends the selected preamble on the determined PRACH occasion.
  • Step 302 The UE receives a random access response (Random Access Response, RAR) sent from the base station side.
  • RAR Random Access Response
  • this RAR carries the sequence number (preamble index id) corresponding to the premable sent by the UE in step 1, then the UE can determine that the RAR is sent to itself.
  • UL grant will be carried in such RAR.
  • the UL grant indicates the PUSCH resource used for message 3 transmission.
  • the UE After receiving the above-mentioned RAR, the UE will process the UL grant carried in the RAR and indicate it to the lower layer. If this is the first time that the UE successfully receives the above RAR, then the UE obtains the MAC PDU for transmission from the multiplexing and assembly entity and saves it in the buffer of message 3 (MSG3buffer).
  • MSG3buffer the buffer of message 3
  • Step 303 The UE sends message 3 on the PUSCH resource indicated by the UL grant.
  • the UE will carry identification information for contention conflict resolution.
  • Step 304 the UE receives the message 4 sent by the base station side.
  • the UE If the message 4 carries the identification information of the UE carried in the message 3, the UE considers that the contention conflict is resolved and the random access procedure is successfully completed.
  • the "two-step random access procedure” in the present invention generally includes the following steps.
  • Step 401 The UE sends a message A to the base station.
  • message A includes the preamble and the payload of message A;
  • the preamble is sent on PRACH, and the payload of message A is sent on PUSCH.
  • the payload of message A is packaged into MAC PDU and transmitted on PUSCH.
  • the payload of message A can carry RRC messages, such as an RRC connection establishment request message, and can also carry user data packets.
  • Step 402 The UE receives the message B sent by the base station.
  • the message B carries information used for contention conflict resolution.
  • the UE first sends MSG A, including the load of sending the preamble and sending the message A; then the UE receives the message B sent by the base station.
  • Message B is the response information from the network side/base station to MSG A sent by the UE.
  • the UE determines a transmission opportunity that can be used for message A, the UE obtains a MAC PDU for transmission from a multiplexing and assembly entity (Multiplexing and Assembly entity), and stores the obtained MAC PDU in a buffer area.
  • a multiplexing and assembly entity Multiplexing and Assembly entity
  • the transmission timing that can be used for the message A contains the preamble sequence transmitted on the PRACH and the load information of the message A transmitted on the PUSCH, as the transmission timing that can be used for the message A, for example, the following conditions can be used as the foregoing transmission timing, including: UE determines The PUSCH timing that can be used to transmit the load of message A; or the UE determines the next available PRACH timing, which is used to transmit the above-mentioned preamble sequence; or the UE selects a preamble sequence and the selected preamble sequence It is used for this random access procedure; or the preamble selected by the UE is associated with PUSCH or PUSCH timing.
  • FIG. 5 is a block diagram showing a user equipment UE related to the present invention.
  • the user equipment UE50 includes a processor 501 and a memory 502.
  • the processor 501 may include, for example, a microprocessor, a microcontroller, an embedded processor, and the like.
  • the memory 502 may include, for example, volatile memory (such as random access memory RAM), hard disk drive (HDD), non-volatile memory (such as flash memory), or other memories.
  • the memory 502 stores program instructions. When the instruction is run by the processor 501, it can execute the random access method described in detail in the present invention.
  • the UE in order to transmit message A, the UE first needs to determine the time to transmit message A.
  • the buffer area may be the message 3buffer in the prior art, or a new buffer different from the message 3buffer, which may be called MSG A buffer or MSG A payload buffer.
  • the UE performs this step, that is, obtains the MAC PDU for transmission from the multiplexing and assembly entity (Multiplexing and Assembly entity), and saves it in a buffer.
  • the UE instructs the multiplexing and assembly entity (Multiplexing and Assembly entity) to include the C-RNTI MAC CE in the next transmission.
  • C-RNTI MAC CE is the MAC CE that carries the C-RNTI of the UE.
  • the UE may regard the PUSCH opportunity included in the opportunity as a UL grant, process the UL grant, and optionally indicate it to the lower layer .
  • Message A contains the preamble sequence and load information of message A.
  • the preamble sequence is transmitted on the PRACH channel, and the load information of message A is transmitted on the PUSCH channel. Therefore, the "determining the transmission timing of message A" may be determining the PUSCH timing that can be used to transmit the load information of message A.
  • the UE When the UE determines (determined/selected) the PUSCH time that can be used to transmit the load information of message A, the UE obtains the MAC PDU for transmission from the multiplexing and assembly entity (Multiplexing and Assembly), and uses it Stored in the buffer area.
  • the buffer area may be the message 3buffer in the prior art, or a new buffer different from the message 3buffer, which may be called MSG A buffer or MSG A payload buffer.
  • the UE determines the PUSCH timing during this random access process, or only when the determined PUSCH timing is used for the first time of MSGA payload (MSG A) /When the first transmission (transmision), then the UE performs this step, that is, obtains the MAC PDU for transmission from the multiplexing and assembly entity (Multiplexing and Assembly), and saves it in the buffer )in.
  • MSGA payload MSGA payload
  • the UE instructs the multiplexing and assembly entity (Multiplexing and Assembly entity) to include the C-RNTI MAC CE in the next transmission.
  • C-RNTI MAC CE is the MAC CE that carries the C-RNTI of the UE.
  • the UE may regard the PUSCH opportunity as a UL grant, process the UL grant, and optionally, indicate it to the lower layer.
  • the UE determines (determined/selected) the PUSCH timing that can be used for transmission" specifically, for example, as in Embodiment 2 described below, the UE determines the PUSCH timing based on the available PRACH timing it selects, As in Embodiment 3 described below, the UE may determine the PUSCH timing based on the preamble sequence selected by the UE, or determine the PUSCH timing based on the combination of the selected PRACH timing and the selected preamble sequence.
  • Embodiment 2 the following situation is considered, that is, there is a one-to-one correspondence between the PRACH timing and the PUSCH timing as shown in FIG. 6 below.
  • the PRACH here refers to the PRACH used to transmit the preamble sequence of the message A
  • the PUSCH refers to the PUSCH used to transmit the load information of the message A.
  • the UE may obtain this correspondence relationship according to pre-configured information.
  • the base station/network side configures the time and frequency domain information of the PRACH resource in the system information. Based on this information, the UE can determine each PRACH opportunity; at the same time, the base station/network side also configures the timing of each PUSCH timing and its corresponding PRACH timing. Frequency offset, and/or time offset, and the UE can be notified by broadcast; then, when the UE determines the next PRACH opportunity that can be used for transmission, it can combine with the pre-configured PRACH time and frequency information based on the PRACH opportunity The frequency offset and time offset can determine the next PUSCH timing that can be used for transmission.
  • the embodiment 1 can be changed or adjusted to obtain another embodiment as follows.
  • the PRACH opportunity is used to transmit the preamble sequence in message A, and the UE obtains it from the multiplexing and assembly entity (Multiplexing and Assembly entity). It is used to send the MAC PDU and save it in the buffer area.
  • the multiplexing and assembly entity Multiplexing and Assembly entity
  • the buffer area may be the message 3buffer in the prior art, or a new buffer different from the message 3buffer, which may be called MSG A buffer or MSG A payload buffer.
  • the UE performs this step, that is, obtains the MAC PDU used for transmission from the multiplexing and assembly entity (Multiplexing and Assembly), and uses it Stored in the buffer (buffer).
  • the UE instructs the Multiplexing and Assembly entity (Multiplexing and Assembly entity) to include the C-RNTI MAC CE in the next transmission.
  • Multiplexing and Assembly entity Multiplexing and Assembly entity
  • the UE may regard the PUSCH opportunity associated with the PRACH opportunity as a UL grant, process the UL grant, and optionally indicate it to Lower level.
  • Embodiment 3 the following situation is further considered. That is, as shown in FIG. 7, in addition to the timing of PUSCH corresponding to the PRACH timing (for example, the above-mentioned situation in Embodiment 2), the timing of PUSCH is further identical to the preamble sequence. One correspondence.
  • one PRACH opportunity corresponds to multiple PUSCH opportunities (or PUSCH occasions group), and each PUSCH opportunity corresponds to a preamble one-to-one.
  • the PUSCH occurrence group corresponding to a PRACH opportunity is called the PUSCH resource.
  • the UE can use the method described in the embodiment, first determine the available PUSCH occasions group according to the determined next available PRACH opportunity, and then determine the available PUSCH occasions group according to the selected preamble The UE can be used to transmit the PUSCH timing of MSG A payload.
  • it can be to number the PUSCH occasions in the PUSCH occasions group. It can be sorted and numbered in ascending order according to the time or frequency of the PUSCH resource where each PUSCH occasion is located, from low to high (or from small to large)
  • all the preambles that can be used to determine the PRACH timing of the PUSCH unit are arranged according to the size of the sequence number, from small to large.
  • the preamble index can be one-to-one corresponding to the number of the PUSCH unit, so that the UE can determine the PUSCH timing that can be used to transmit the MSG A payload by determining the preamble.
  • Embodiment 1 can be changed or adjusted, thereby obtaining another possible implementation as follows.
  • this preamble is used for the 2-step RA process, or the preamble selected by the UE corresponds/associates with the PUSCH (or is associated with the PUSCH timing), then the UE resumes
  • the MAC PDU used for transmission is obtained from the multiplexing and assembly entity (Multiplexing and Assembly entity) and stored in the buffer area.
  • the buffer area may be the message 3 buffer in the prior art, or a new buffer different from the message 3 buffer, and it may be called MSG A buffer or MSG A payload buffer.
  • the UE performs this step, that is, obtains the MAC PDU for transmission from the multiplexing and assembly entity, and saves it In the buffer (buffer).
  • the UE instructs the Multiplexing and Assembly entity (Multiplexing and Assembly entity) to include the C-RNTI MAC CE in the next transmission.
  • Multiplexing and Assembly entity Multiplexing and Assembly entity
  • the UE when the UE selects a preamble, in particular, this preamble is used for the 2-step RA process, or the preamble selected by the UE corresponds to/associates with PUSCH (or is associated with PUSCH timing)
  • the UE may regard the PUSCH timing associated with the preamble as a UL grant, process the UL grant, and optionally, indicate it to the lower layer.
  • Another implementation manner of the above solution may occur after the UE instructs the physical layer to send the preamble on the selected PRACH occasion.
  • the UE instructs the physical layer to send the preamble on the selected PRACH occasion.
  • the UE obtains (obtain) the MAC PDU used for transmission from the multiplexing and assembly entity (Multiplexing and Assembly), and saves it in the buffer area.
  • the buffer area may be the message 3buffer in the prior art, or a new buffer different from the message 3buffer, which may be called MSG A buffer or MSG A payload buffer.
  • the UE performs this step, that is, obtains it from the multiplexing and assembly entity (Multiplexing and Assembly) (Obtain) MAC PDU used for transmission, and save it in the buffer.
  • the UE instructs the multiplexing and assembly entity (Multiplexing and Assembly entity) to include the C-RNTI MAC CE in the next transmission.
  • the UE when the preamble sent by the UE is used for the 2-step RA process, or the sent preamble is corresponding to/associated with PUSCH (or associated with PUSCH timing), it can also be the PRACH used to send the preamble.
  • the timing corresponds to/associated with the PUSCH (or is associated with the PUSCH timing), the UE can treat the PUSCH timing associated with the preamble as a UL grant, process this UL grant, and optionally indicate it to the lower layer .
  • Example 4 of the present invention will be described.
  • Embodiment 1-3 if the UE obtains a MAC PDU for transmission from a multiplexing and assembly entity (Multiplexing and Assembly entity), and saves it in the MSG 3 buffer area.
  • a multiplexing and assembly entity Multiplexing and Assembly entity
  • the UE when the UE receives a UL grant, if the UL grant is used for 2-step RA, or is used for MSG A payload transmission, or the UL grant is related to 2-step RA, then The UE can take out the MAC PDU from the MSG 3 buffer to send.
  • the UE When the UE receives a UL grant in the RAR, the UE takes out the MAC PDU from the MSG 3buffer and sends it.
  • the UE when it obtains the MAC PDU used to send, it sends the MAC PDU and UL grant to its corresponding HARQ process, and instructs the HARQ process to trigger the first transmission of a transport block ( new transmission).
  • This transmission block carries the aforementioned MAC PDU.
  • the HARQ process receives a request for the first transmission location of a certain transport block, the MAC PDU corresponding to the transport block is stored in the HARQ buffer, and this HARQ buffer corresponds to/belongs to the HARQ process; and save the received UL grant. Then the HARQ process instructs the physical layer/lower layer to transmit the transport block on the saved UL grant.
  • the UE obtains the MAC PDU for transmission from the multiplexing and assembly entity (Multiplexing and Assembly entity), and saves it in a buffer area other than the MSG 3 buffer area, Or it is called MSG A buffer area.
  • the UE when the UE receives a UL grant, if the UL grant is used for 2-step RA, or is used for MSG A payload transmission, or the UL grant is related to 2-step RA, then the UE You can take out the MAC PDU from the MSG A buffer and send it.
  • the UE When the UE receives a UL grant in the RAR, the UE takes out the MAC PDU from the MSG 3buffer and sends it.
  • the UE when it obtains the MAC PDU used to send, it sends the MAC PDU and UL grant to its corresponding HARQ process, and instructs the HARQ process to trigger the first transmission of a transport block ( new transmission).
  • This transmission block carries the aforementioned MAC PDU.
  • the HARQ process receives a request for the first transmission location of a certain transport block, the MAC PDU corresponding to the transport block is stored in the HARQ buffer, and this HARQ buffer corresponds to/belongs to the HARQ process; and save the received UL grant. Then the HARQ process instructs the physical layer/lower layer to transmit the transport block on the saved UL grant.
  • the program running on the device according to the present invention may be a program that enables the computer to implement the functions of the embodiments of the present invention by controlling a central processing unit (CPU).
  • the program or the information processed by the program can be temporarily stored in volatile memory (such as random access memory RAM), hard disk drive (HDD), non-volatile memory (such as flash memory), or other memory systems.
  • a program for realizing the functions of each embodiment of the present invention can be recorded on a computer-readable recording medium.
  • Corresponding functions can be realized by causing the computer system to read the programs recorded on the recording medium and execute these programs.
  • the so-called "computer system” herein may be a computer system embedded in the device, and may include an operating system or hardware (such as peripheral devices).
  • the "computer-readable recording medium” may be a semiconductor recording medium, an optical recording medium, a magnetic recording medium, a recording medium storing a program dynamically for a short time, or any other recording medium readable by a computer.
  • circuits for example, single-chip or multi-chip integrated circuits.
  • Circuits designed to perform the functions described in this specification can include general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field programmable gate arrays (FPGA), or other programmable logic devices, discrete Gate or transistor logic, discrete hardware components, or any combination of the above devices.
  • the general-purpose processor may be a microprocessor, or any existing processor, controller, microcontroller, or state machine.
  • the above-mentioned circuit can be a digital circuit or an analog circuit. In the case of new integrated circuit technologies that replace existing integrated circuits due to advances in semiconductor technology, one or more embodiments of the present invention can also be implemented using these new integrated circuit technologies.
  • the present invention is not limited to the above-mentioned embodiment. Although various examples of the embodiment have been described, the present invention is not limited thereto.
  • Fixed or non-mobile electronic equipment installed indoors or outdoors can be used as terminal equipment or communication equipment, such as AV equipment, kitchen equipment, cleaning equipment, air conditioners, office equipment, vending machines, and other household appliances.

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Abstract

一种随机接入方法以及用户设备，随机接入方法包括：用户设备UE向基站发送消息A，消息A包含前导序列和消息A的负载；UE在完成消息A的发送之后，接收基站发送的对消息A的响应消息的消息B，其中，前导序列在物理随机接入信道PRACH上发送，消息A的负载被包装成媒体接入控制协议数据单元MAC PDU在物理上行共享信道PUSCH上传输，在UE确定了能用于消息A的传输时机时，UE从复用和组装实体中获取用于发送的MAC PDU，并将MAC PDU保存在缓存区。

Description

随机接入方法以及用户设备 技术领域
本发明涉及无线通信技术领域，更具体地，本发明涉及随机接入方法以及用户设备。
背景技术
在现有技术中，当UE在执行随机接入过程时，信令流程如图1所示那样，包含4个步骤(步骤101～步骤104)，所以一般可将上述随机接入过程称为四步随机接入过程(以下，可简记为：4-step RA过程)。
为了缩短完成随机接入过程的时间，目前在讨论一种基于两步的随机接入过程，信令流程如图2所示那样，包含两个步骤，一般可将这种随机接入过程称为两步随机接入过程(以下，可简记为：2-step RA过程)。如图2所示，在步骤201中，UE向基站发送消息A(Message A，MSG A)，MSG A包括前导序列preamble以及MSG A的有效负载(MSG A payload)。
在4-step RA过程中，当UE在接收到的RAR中获得UL grant时，UE会从复用和组装实体(Multiplexing and assembly entity)中获取用于发送的MAC协议数据单元(MAC PDU)，并将它保存在消息3的缓存区。这个MAC PDU将在接下来的步骤3中作为MSG 3发送给基站。
在2-step RA过程中，携带了与MSG 3的内容相当或者相同的MAC PDU将作为MSG A payload发送给基站，因此UE如何在执行上述2-step RA的过程中获取用于传输的MSG A payload是需要解决的问题。
发明内容
为了解决上述问题中的至少一部分，本发明提供一种随机接入方法以及用户设备。
根据本发明的第一方面，提供一种随机接入方法，包括：用户设备UE向基站发送消息A，所述消息A包含前导序列和该消息A的负载；和所述 UE在完成消息A的发送之后，接收所述基站发送的对消息A的响应消息的消息B，其中，所述前导序列在在物理随机接入信道PRACH上发送，所述消息A的负载被包装成媒体接入控制协议数据单元MAC PDU在物理上行共享信道PUSCH上传输，在所述UE确定了能用于所述消息A的传输时机时，所述UE从复用和组装实体中获取用于发送的所述MAC PDU，并将所述MAC PDU保存在缓存区。
在上述随机接入方法中，所述UE确定了能用于所述消息A的传输时机可以包括如下情况：UE确定了能用于传输消息A的负载的PUSCH时机；或者所述UE确定了下一个能用的PRACH时机，该PRACH时机用于传输所述的前导序列；或者所述UE选定了一个所述前导序列并且所选定的前导序列是用于本次随机接入过程；或者所述UE选定的所述前导序列关联着所述PUSCH或关联着PUSCH时机。
在上述随机接入方法中，在UE确定了能用于传输的PUSCH时机的情况下，在被确定的所述PUSCH时机是所述UE在本次随机接入过程中首次确定的PUSCH时机时，或者，在被确定的所述PUSCH时机用于所述消息A的负载的首次传输时，所述UE从所述复用和组装实体中获取用于发送的所述MAC PDU。
在上述随机接入方法中，在所述UE确定了下一个能用的PRACH时机的情况下，在被确定的所述PRACH时机是所述UE在本次随机接入过程中首次确定的PRACH时机时，或者，与被确定的所述PRACH时机相关联的PUSCH时机用于所述消息A的负载的首次传输时，所述UE从所述复用和组装实体中获取用于发送的所述MAC PDU。
在上述随机接入方法中，在所述UE选定了一个所述前导序列的情况下，在所选定的所述前导序列是本次随机接入过程中首次选定的前导序列时，或者，与所选定的所述前导序列相关联的PUSCH时机用于所述消息A的负载的首次传输时，所述UE从所述复用和组装实体中获取用于发送的所述MAC PDU。
在上述随机接入方法中，所述UE指示物理层在选定的PRACH时机上发送所述前导序列，在所述UE发送的所述前导序列是用于本次随机接入过程时，或者所述UE发送的所述前导序列关联着PUSCH时，或者用于发送所述前导序列的PRACH时机关联着PUSCH时，所述UE从所述复用和组 装实体中获取用于发送的所述MAC PDU。
在上述随机接入方法中，在所述UE确定了能用于传输的PUSCH时机时，所述UE将所述PUSCH时机作为一个上行授权UL grant，并处理所述UL grant；在所述UE确定了下一个能用的PRACH时机时，所述UE将与该PRACH时机相关联的PUSCH时机作为一个上行授权UL grant，并处理所述UL grant；在所述UE选定了一个所述前导序列并且所选定的前导序列是用于本次随机接入过程，或者所述UE选定的所述前导序列关联着所述PUSCH或关联着PUSCH时机时，所述UE将与该前导序列相关联的PUSCH时机作为一个上行授权UL grant，并处理所述UL grant。
在上述随机接入方法中，在所述消息A的负载的传输或所述消息A的传输与公共控制信道CCCH无关的情况下，或者，在所述消息A的负载的传输或所述消息A的传输不是为了逻辑信道类型为公共控制信道CCCH的逻辑信道而产生的情况下，所述UE指示所述复用和组装实体将C-RNTI MAC CE包含在接下来的传输中。
在上述随机接入方法中，所述UE将所述MAC PDU保存在消息3缓存区或者作为非消息3缓存区的缓存区，在所述UE接收到一个上行授权UL grant时，在所述UL grant是用于本次随机接入过程，或者所述UL grant是用于所述消息A的负载的传输，或者所述UL grant是与本次随机接入过程相关的情况下，所述UE从所保存的缓存区中取出所述MAC PDU来发送，在所述UE在随机接入响应RAR中接收到一个上行授权UL grant时，所述UE从所保存的缓存区中取出所述MAC PDU来发送。
根据本发明的第二方面，提供一种用户设备，包括：处理器；以及存储器，存储有指令；其中，所述指令在由所述处理器运行时执行根据上下文所述的随机接入方法。
附图说明
图1是表示作为随机接入过程的一种的四步随机接入过程的概略顺序图。
图2是表示作为随机接入过程的一种的两步随机接入过程的概略顺序图。
图3是表示四步随机接入过程的详细顺序图。
图4是表示本发明所涉及的两步随机接入过程的详细顺序图。
图5是表示本发明所涉及的用户设备UE的框图。
图6是表示PRACH时机与PUSCH时机的对应关系的图。
图7是表示PUSCH时机与前导序列的对应关系的图。
具体实施方式
下面结合附图和具体实施方式对本发明进行详细阐述。应当注意，本发明不应局限于下文所述的具体实施方式。另外，为了简便起见，省略了对与本发明没有直接关联的公知技术的详细描述，以防止对本发明的理解造成混淆。
在具体描述之前，先对本发明中提到的若干术语做如下说明。除非另有指出，本发明中涉及的术语都具有下文的含义
UE        User Equipment  用户设备
NR        New Radio  新一代无线技术
LTE       Long Term Evolution  长期演进技术
eLTE      Enhaced Long Term Evolution  增强的长期演进技术
RRC      Radio Resource Control  无线资源控制(层)
MAC      Medium Access Control  媒体接入控制(层)
MAC CE   MAC Control Element MAC层控制信息
MAC PDU   MAC协议数据单元
MSG 3     Message 3 消息3
PRACH    Physical Random Access Channel  物理随机接入信道
PUSCH    Physical Uplink Shared Channel  物理上行共享信道
CCCH    Common Control Channel  公共控制信道
UL grant   Uplink grant  上行授权
C-RNTI     Cell Radio Network Temporary Identifier 小区无线网络临时标识
RA Random Access  随机接入
RAR Random Access Response  随机接入响应
下文以NR移动通信系统及其后续的演进版本作为示例应用环境，以支持NR的基站和UE设备为例，具体描述了根据本发明的多个实施方式。然 而，需要指出的是，本发明不限于以下实施方式，而是可适用于更多其它的无线通信系统，例如eLTE通信系统，而且可以适用于其他基站和UE设备，例如支持eLTE的基站和UE设备。
以下，首先基于图3对现有技术中的四步随机接入过程进行说明。如图3所示，UE在执行4步随机接入过程时，一般包含下述步骤。
步骤300：UE选定用于随机接入的随机接入资源。在这一过程中
-UE选定了用于发送的前导序列(preamble)，将选定的preamble对应的序号设置为参数PREAMBLE_INDEX的值；以及
-在多个PRACH时机(PRACH occassions)中确定下一个可以用于传输的PRACH时机(determine the next available PRACH occasion from the PRACH occasions)。
步骤301：UE在确定的PRACH时机上发送选定的preamble。
步骤302：UE接收基站侧发来的随机接入响应(Random Access Response，RAR)。
如果在这个RAR中携带了UE在步骤1中发送的premable对应的序号(preamble index id)，那么UE可以确定该RAR是发送给自己的。在这样的RAR中会携带UL grant。该UL grant指示了用于传输消息3的PUSCH资源。
当接收到上述的RAR之后，UE会处理RAR中携带的UL grant，并将它指示给下层。如果这是UE第一次成功的接收到上述RAR，那么UE从复用和组装实体(Multiplexing and assembly entity)中获取(obtain)用于发送的MAC PDU，并将它保存在消息3的缓存区(MSG3buffer)中。
步骤303：UE在UL grant指示的PUSCH资源上发送消息3。
在这个消息3中，UE会携带用于竞争冲突解决的标识信息。
步骤304：UE接收基站侧发送来的消息4。
在消息4中如果携带了UE在消息3中携带的标识信息，那么UE认为竞争冲突解决，随机接入过程成功完成。
由于在上述随机接入过程中UE经历了步骤1-4的消息传递过程，因此被称为“四步随机接入”(4-step RA)过程。
为了缩短随机接入的时间，目前正在讨论“两步随机接入”(2-step RA) 过程。基于图4，对本发明所涉及的“两步随机接入过程”进行详细说明。本发明中的“两步随机接入过程”一般包含如下步骤。
步骤401：UE向基站发送消息A。
其中，消息A包含preamble和消息A的负载(payload)；
其中，preamble在PRACH上发送，消息A的payload在PUSCH上发送。消息A的payload是被包装成MAC PDU在PUSCH上传输。消息A的payload中可以携带RRC消息，例如RRC连接建立请求消息，还可以携带用户数据包。
步骤402：UE接收基站发送的消息B。
其中消息B携带了用于竞争冲突解决的信息。
从时间顺序上来看，UE首先发送MSG A，包含发送preamble以及发送消息A的负载；然后UE接收到基站发送的消息B。消息B是网络侧/基站对UE发送的MSG A的响应信息。
此外，在UE确定了能用于消息A的传输时机时，UE从复用和组装实体(Multiplexing and assembly entity)中获取用于发送的MAC PDU，并将获取的MAC PDU保存在缓存区。
由于消息A中包含了在PRACH传输的前导序列，以及在PUSCH上传输的消息A的负载信息，因此作为可用于消息A的传输时机，例如可以将如下的情况作为上述传输时机，包括：UE确定了能用于传输消息A的负载的PUSCH时机；或者UE确定了下一个能用的PRACH时机，该PRACH时机用于传输上述前导序列；或者UE选定了一个前导序列并且所选定的前导序列是用于本次随机接入过程；或者UE选定的前导序列关联着PUSCH或关联着PUSCH时机。
再有，图5是表示本发明所涉及的用户设备UE的框图。如图5所示，该用户设备UE50包括处理器501和存储器502。处理器501例如可以包括微处理器、微控制器、嵌入式处理器等。存储器502例如可以包括易失性存储器(如随机存取存储器RAM)、硬盘驱动器(HDD)、非易失性存储器(如闪速存储器)、或其他存储器等。存储器502上存储有程序指令。该指令在由处理器501运行时，可以执行本发明中详细描述的随机接入方法。
以下，对本发明所涉及的具体的示例以及实施例等进行详细说明。另 外，如上所述，本公开中记载的示例以及实施例等是为了容易理解本发明而进行的示例性说明，并不是对本发明的限定。
实施例1
在执行2-step随机接入过程中，为了传输消息A，UE首先需要确定传输消息A的时机。
当UE确定(determined/selected)了可以用于传输消息A的时机时，UE从复用和组装实体(Multiplexing and assembly entity)中获取(obtain)用于发送的MAC PDU，并将它保存在缓存区中。该缓存区可以是现有技术中的消息3buffer，也可以是一个不同于的消息3buffer的新的buffer，可以称其为MSG A buffer或者是MSG A payload buffer。
可选地，只有当这是UE在这个随机接入过程中第一次/首次确定的消息A的传输时机时，又或者，只有当这个被确定的时机用于MSGA的第一次/首次传输(transmision)时，那么UE才执行该步骤，即，从复用和组装实体(Multiplexing and assembly entity)中获取(obtain)用于发送的MAC PDU，并将它保存在缓存区(buffer)中。
此外，可选地，当MSG A payload(或者MSG A)的传输与公共控制信道无关，或者，当MSG A payload(或者MSG A)的传输不是为了逻辑信道类型为公共控制信道(CCCH)的逻辑信道而产生的，那么UE指示复用和组装实体(Multiplexing and assembly entity)将C-RNTI MAC CE包含在接下来的传输中。这里C-RNTI MAC CE是值携带了UE的C-RNTI的MAC CE。
可选地，当UE确定了可以用于传输消息A的时机时，UE可以把该时机中包含的PUSCH时机视为一个UL grant，并处理这个UL grant，以及可选地，将它指示给下层。
消息A包含前导序列和消息A的负载信息，其中前导序列在PRACH信道上传输，消息A的负载信息在PUSCH信道上传输。因此所述“确定消息A的传输时机”可以是确定可以用于传输消息A负载信息的PUSCH时机。
基于此，上述实施例的一种实现方式可以按如下的方式实施。
当UE确定(determined/selected)了可以用于传输消息A负载信息的PUSCH时机时，UE从复用和组装实体(Multiplexing and assembly entity) 中获取(obtain)用于发送的MAC PDU，并将它保存在缓存区中。该缓存区可以是现有技术中的消息3buffer，也可以是一个不同于的消息3buffer的新的buffer，可以称其为MSG A buffer或者是MSG A payload buffer。
可选地，只有当这是UE在这个随机接入过程中第一次/首次确定的PUSCH时机时，又或者，只有当这个被确定的PUSCH时机用于MSGA payload(MSG A)的第一次/首次传输(transmision)时，那么UE才执行该步骤，即，从复用和组装实体(Multiplexing and assembly entity)中获取(obtain)用于发送的MAC PDU，并将它保存在缓存区(buffer)中。
另外，可选地，当MSG A payload(或者MSG A)的传输与公共控制信道无关，或者，当MSG A payload(或者MSG A)的传输不是为了逻辑信道类型为公共控制信道(CCCH)的逻辑信道而产生的，那么UE指示复用和组装实体(Multiplexing and assembly entity)将C-RNTI MAC CE包含在接下来的传输中。这里C-RNTI MAC CE是值携带了UE的C-RNTI的MAC CE。
可选地，当UE确定了可以用于传输PUSCH时机时，UE可以把该PUSCH时机视为一个UL grant，并处理这个UL grant，以及可选地，将它指示给下层。
上述过程中，“UE确定(determined/selected)可以用于传输的PUSCH时机”，具体地，例如可以如以下所说明的实施例2那样，UE基于其选取的可用的PRACH时机来确定PUSCH时机，还可以如以下所说明的实施例3那样，UE基于UE选择的前导序列来确定PUSCH时机，或者基于选择的PRACH时机以及选择的前导序列两者的结合来确定PUSCH时机。
实施例2
在实施例2中考虑了如下情况，即如下图6所示那样PRACH时机与PUSCH时机存在一一对应的关系。这里的PRACH是指用于传输消息A的前导序列的PRACH，PUSCH是指用于传输消息A的负载信息的PUSCH。
UE可以是根据预先配置的信息获得这种对应关系。例如，基站/网络侧在系统信息中配置了PRACH资源的时间和频域信息，根据该信息，UE可以确定每一个PRACH时机；同时基站/网络侧还配置每一个PUSCH时机与其对应的PRACH时机的频率偏移，和/或时间偏移，并且可以通过广播的方式通知UE；那么，当UE确定了下一个可以用于传输的PRACH时机时， 可以根据该PRACH时机的时间频率信息，结合预先配置的频率偏移和时间偏移，即可确定下一个可以用于传输的PUSCH时机。
因此，基于实施例2中所考虑的上述情况，可以对实施例1进行变更或者调整，可获得如下的又一实施方式。
当UE确定了下一个可用的PRACH时机(available PRACH occasion)时，该PRACH时机是用于传输消息A中的前导序列，UE从复用和组装实体(Multiplexing and assembly entity)中获取(obtain)用于发送的MAC PDU，并将它保存在缓存区中。
该缓存区可以是现有技术中的消息3buffer，也可以是一个不同于的消息3buffer的新的buffer，可以称其为MSG A buffer或者是MSG A payload buffer。
可选地，只有当这是UE在这个随机接入过程中第一次/首次确定的PRACH时机时，又或者，只有当与这个被确定的PRACH时机相关联的PUSCH时机用于MSGA payload(MSG A)的第一次/首次传输(transmision)时，那么UE才执行该步骤，即，从复用和组装实体(Multiplexing and assembly entity)中获取(obtain)用于发送的MAC PDU，并将它保存在缓存区(buffer)中。
可选地，当MSG A payload(或者MSG A)的传输与公共控制信道无关，或者，当MSG A payload(或者MSG A)的传输不是为了逻辑信道类型为公共控制信道(CCCH)的逻辑信道而产生的，那么UE指示复用和组装实体(Multiplexing and assembly entity)将C-RNTI MAC CE包含在接下来的传输中。
可选地，当UE确定了下一个可用的PRACH时机时，UE可以把与该PRACH时机相关联的该PUSCH时机视为一个UL grant，并处理这个UL grant，以及可选地，将它指示给下层。
实施例3
在实施例3中进一步考虑了如下情况，即：如图7所示，PUSCH的时机除了和PRACH时机对应(例如实施例2中的上述情况)外，PUSCH的时机还进一步地与前导序列存在一一对应的关系。
也就是说，一个PRACH时机与多个PUSCH时机(或者PUSCH时机组，PUSCH occasions group)对应，每个PUSCH时机与preamble一一对应。 这里称与一个PRACH时机对应的PUSCH occasions group为PUSCH资源。
在这种情况下，UE可以采用实施例中所述的方法，首先根据确定的下一个可用的PRACH时机来确定可用的PUSCH occasions group，然后再根据选定的preamble，确定在可用的PUSCH occasions group中UE可以用来传输MSG A payload的PUSCH时机。
具体可以是对PUSCH occasions group中的PUSCH时机进行编号，可以时按照每个PUSCH时机所在PUSCH资源的时间或者频率的起始位置，从从低到高(或者从小到大)进行升序排序并编号
同时，对所有可以用于确定该PUSCH时机组的PRACH时机上传输的preamble按照序号的大小，从小到大进行排列。
可以将preamble index与PUSCH时机组的编号一一对应，从而使得UE可以通过确定preamble来确定可以用于传输MSG A payload的PUSCH时机。
基于实施例3中所考虑的上述情况，可以对实施例1进行变更或者调整，由此可获得如下的又一种可能的实施方式。
当UE选定一个preamble时，特别的，这个preamble是用于2-step RA过程的，或者是UE选定的preamble对应着/关联着PUSCH(或者是关联着PUSCH时机)，那么，UE从复用和组装实体(Multiplexing and assembly entity)中获取(obtain)用于发送的MAC PDU，并将它保存在缓存区中。
该缓存区可以是现有技术中的消息3 buffer，也可以是一个不同于的消息3buffer的新的buffer，可以称其为MSG A buffer或者是MSG A payload buffer。
可选地，只有当这是UE在这个随机接入过程中第一次/首次选定preamble时，又或者，只有当与这个被选定的preamble相关联的PUSCH时机用于MSGA payload(MSG A)的第一次/首次传输(transmision)时，那么UE才执行该步骤，即，从复用和组装实体(Multiplexing and assembly entity)中获取(obtain)用于发送的MAC PDU，并将它保存在缓存区(buffer)中。
可选地，当MSG A payload(或者MSG A)的传输与公共控制信道无关，或者，当MSG A payload(或者MSG A)的传输不是为了逻辑信道类型为公共控制信道(CCCH)的逻辑信道而产生的，那么UE指示复用和组 装实体(Multiplexing and assembly entity)将C-RNTI MAC CE包含在接下来的传输中。
此外，可选地，当UE选定一个preamble时，特别的，这个preamble是用于2-step RA过程的，或者是UE选定的preamble对应着/关联着PUSCH(或者是关联着PUSCH时机)，UE可以把与该preamble相关联的该PUSCH时机视为一个UL grant，并处理这个UL grant，以及可选地，将它指示给下层。
进一步，上述方案的又一实施方式可以是发生在UE指示物理层在选定的PRACH时机上发送preamble之后。
例如，UE指示物理层在选定的PRACH时机上发送preamble。
当UE发送的preamble是用于2-step RA过程的，或者是发送的preamble对应着/关联着PUSCH(或者是关联着PUSCH时机)，还可以是用于发送preamble的PRACH时机对应着/关联着PUSCH(或者是关联着PUSCH时机)，那么，UE从复用和组装实体(Multiplexing and assembly entity)中获取(obtain)用于发送的MAC PDU，并将它保存在缓存区中。
该缓存区可以是现有技术中的消息3buffer，也可以是一个不同于的消息3buffer的新的buffer，可以称其为MSG A buffer或者是MSG A payload buffer。
可选地，只有当这是UE在这个随机接入过程中第一次/首次发送preamble时，又或者，只有当与这个被发送的preamble相关联的PUSCH时机或者是与这个用于发送preamble的PRACH时机相关联的PUSCH时机用于MSGA payload(MSG A)的第一次/首次传输(transmision)时，那么UE才执行该步骤，即，从复用和组装实体(Multiplexing and assembly entity)中获取(obtain)用于发送的MAC PDU，并将它保存在缓存区(buffer)中。
可选地，当MSG A payload(或者MSGA)的传输与公共控制信道无关，或者，当MSG A payload(或者MSG A)的传输不是为了逻辑信道类型为公共控制信道(CCCH)的逻辑信道而产生的，那么UE指示复用和组装实体(Multiplexing and assembly entity)将C-RNTI MAC CE包含在接下来的传输中。
此外，可选地，当UE发送的preamble是用于2-step RA过程的，或者 是发送的preamble对应着/关联着PUSCH(或者是关联着PUSCH时机)，还可以是用于发送preamble的PRACH时机对应着/关联着PUSCH(或者是关联着PUSCH时机)，UE可以把与该preamble相关联的该PUSCH时机视为一个UL grant，并处理这个UL grant，以及可选地，将它指示给下层。
实施例4
以下，对本发明的实施例4进行说明。
在实施例1-3，如果UE从复用和组装实体(Multiplexing and assembly entity)中获取(obtain)用于发送的MAC PDU，并将它保存在MSG 3缓存区。
在该情况下，当UE接收到一个UL grant，如果这个UL grant是用于2-step RA的，或者是用于MSG A payload传输的，或者这个UL grant是和2-step RA相关的，那么UE可以从MSG 3 buffer中取出MAC PDU来发送。
当UE在RAR中接收到一个UL grant，那么UE从MSG 3buffer中取出MAC PDU来发送。
特别地，当UE获取了用来发送的MAC PDU时，将这个MAC PDU和UL grant送往(deliver)其对应的HARQ process，并且指示该HARQ process触发一个传输块(transport block)的首次传输(new transmission)。这个传输块中携带了前面所述的MAC PDU。相应地，当HARQ process接收到某个传输块的首次传输地请求时，将该传输块对应的MAC PDU保存在HARQ buffer中，这个HARQ buffer是对应于/属于这个HARQ process；以及保存接收到的UL grant。然后HARQ process指示物理层/下层在保存的UL grant上进行传输该传输块。
或者，在实施例1-3，如果UE从复用和组装实体(Multiplexing and assembly entity)中获取(obtain)用于发送的MAC PDU，并将它保存在一个非MSG 3缓存区的缓存区，或者称为MSG A缓存区。
该情况下，当UE接收到一个UL grant，如果这个UL grant是用于2-step RA的，或者是用于MSG A payload传输的，或者这个UL grant是和2-step RA相关的，那么UE可以从MSG A buffer中取出MAC PDU来发送。
当UE在RAR中接收到一个UL grant，那么UE从MSG 3buffer中取出MAC PDU来发送。
特别地，当UE获取了用来发送的MAC PDU时，将这个MAC PDU和UL grant送往(deliver)其对应的HARQ process，并且指示该HARQ process触发一个传输块(transport block)的首次传输(new transmission)。这个传输块中携带了前面所述的MAC PDU。相应地，当HARQ process接收到某个传输块的首次传输地请求时，将该传输块对应的MAC PDU保存在HARQ buffer中，这个HARQ buffer是对应于/属于这个HARQ process；以及保存接收到的UL grant。然后HARQ process指示物理层/下层在保存的UL grant上进行传输该传输块。
运行在根据本发明的设备上的程序可以是通过控制中央处理单元(CPU)来使计算机实现本发明的实施例功能的程序。该程序或由该程序处理的信息可以临时存储在易失性存储器(如随机存取存储器RAM)、硬盘驱动器(HDD)、非易失性存储器(如闪速存储器)、或其他存储器系统中。
用于实现本发明各实施例功能的程序可以记录在计算机可读记录介质上。可以通过使计算机系统读取记录在所述记录介质上的程序并执行这些程序来实现相应的功能。此处的所谓“计算机系统”可以是嵌入在该设备中的计算机系统，可以包括操作系统或硬件(如外围设备)。“计算机可读记录介质”可以是半导体记录介质、光学记录介质、磁性记录介质、短时动态存储程序的记录介质、或计算机可读的任何其他记录介质。
用在上述实施例中的设备的各种特征或功能模块可以通过电路(例如，单片或多片集成电路)来实现或执行。设计用于执行本说明书所描述的功能的电路可以包括通用处理器、数字信号处理器(DSP)、专用集成电路(ASIC)、现场可编程门阵列(FPGA)、或其他可编程逻辑器件、分立的门或晶体管逻辑、分立的硬件组件、或上述器件的任意组合。通用处理器可以是微处理器，也可以是任何现有的处理器、控制器、微控制器、或状态机。上述电路可以是数字电路，也可以是模拟电路。因半导体技术的进步而出现了替代现有集成电路的新的集成电路技术的情况下，本发明的一个或多个实施例也可以使用这些新的集成电路技术来实现。
此外，本发明并不局限于上述实施例。尽管已经描述了所述实施例的各种示例，但本发明并不局限于此。安装在室内或室外的固定或非移动电子设备可以用作终端设备或通信设备，如AV设备、厨房设备、清洁设备、 空调、办公设备、自动贩售机、以及其他家用电器等。
如上，已经参考附图对本发明的实施例进行了详细描述。但是，具体的结构并不局限于上述实施例，本发明也包括不偏离本发明主旨的任何设计改动。另外，可以在权利要求的范围内对本发明进行多种改动，通过适当地组合不同实施例所公开的技术手段所得到的实施例也包含在本发明的技术范围内。此外，上述实施例中所描述的具有相同效果的组件可以相互替代。

Claims (10)

  1. 一种随机接入方法，包括：
    用户设备UE向基站发送消息A，所述消息A包含前导序列和该消息A的负载；和
    所述UE在完成消息A的发送之后，接收所述基站发送的对消息A的响应消息的消息B，
    其中，所述前导序列在在物理随机接入信道PRACH上发送，所述消息A的负载被包装成媒体接入控制协议数据单元MAC PDU在物理上行共享信道PUSCH上传输，
    在所述UE确定了能用于所述消息A的传输时机时，所述UE从复用和组装实体中获取用于发送的所述MAC PDU，并将所述MAC PDU保存在缓存区。
  2. 根据权利要求1所述的随机接入方法，其中，
    所述UE确定了能用于所述消息A的传输时机包括如下情况：
    UE确定了能用于传输消息A的负载的PUSCH时机；
    或者所述UE确定了下一个能用的PRACH时机，该PRACH时机用于传输所述的前导序列；
    或者所述UE选定了一个所述前导序列并且所选定的前导序列是用于本次随机接入过程；
    或者所述UE选定的所述前导序列关联着所述PUSCH或关联着PUSCH时机。
  3. 根据权利要求2所述的随机接入方法，其中，
    在UE确定了能用于传输的PUSCH时机的情况下，
    在被确定的所述PUSCH时机是所述UE在本次随机接入过程中首次确定的PUSCH时机时，或者，在被确定的所述PUSCH时机用于所述消息A的负载的首次传输时，
    所述UE从所述复用和组装实体中获取用于发送的所述MAC PDU。
  4. 根据权利要求2所述的随机接入方法，其中，
    在所述UE确定了下一个能用的PRACH时机的情况下，
    在被确定的所述PRACH时机是所述UE在本次随机接入过程中首次确定的PRACH时机时，或者，与被确定的所述PRACH时机相关联的PUSCH时机用于所述消息A的负载的首次传输时，
    所述UE从所述复用和组装实体中获取用于发送的所述MAC PDU。
  5. 根据权利要求2所述的随机接入方法，其中，
    在所述UE选定了一个所述前导序列的情况下，
    在所选定的所述前导序列是本次随机接入过程中首次选定的前导序列时，或者，与所选定的所述前导序列相关联的PUSCH时机用于所述消息A的负载的首次传输时，
    所述UE从所述复用和组装实体中获取用于发送的所述MAC PDU。
  6. 根据权利要求2所述的随机接入方法，其中，
    所述UE指示物理层在选定的PRACH时机上发送所述前导序列，
    在所述UE发送的所述前导序列是用于本次随机接入过程时，或者所述UE发送的所述前导序列关联着PUSCH时，或者用于发送所述前导序列的PRACH时机关联着PUSCH时，所述UE从所述复用和组装实体中获取用于发送的所述MAC PDU。
  7. 根据权利要求2所述的随机接入方法，其中，
    在所述UE确定了能用于传输的PUSCH时机时，所述UE将所述PUSCH时机作为一个上行授权UL grant，并处理所述UL grant；
    在所述UE确定了下一个能用的PRACH时机时，所述UE将与该PRACH时机相关联的PUSCH时机作为一个上行授权UL grant，并处理所述UL grant；
    在所述UE选定了一个所述前导序列并且所选定的前导序列是用于本次随机接入过程，或者所述UE选定的所述前导序列关联着所述PUSCH或关联着PUSCH时机时，所述UE将与该前导序列相关联的PUSCH时机作为一个上行授权UL grant，并处理所述UL grant。
  8. 根据权利要求1～7的任意一项所述的随机接入方法，其中，
    在所述消息A的负载的传输或所述消息A的传输与公共控制信道CCCH无关的情况下，或者，在所述消息A的负载的传输或所述消息A的传输不是为了逻辑信道类型为公共控制信道CCCH的逻辑信道而产生的情况下，
    所述UE指示所述复用和组装实体将C-RNTI MAC CE包含在接下来的传输中。
  9. 根据权利要求1～7的任意一项所述的随机接入方法，其中，
    所述UE将所述MAC PDU保存在消息3缓存区或者作为非消息3缓存区的缓存区，
    在所述UE接收到一个上行授权UL grant时，在所述UL grant是用于本次随机接入过程，或者所述UL grant是用于所述消息A的负载的传输，或者所述UL grant是与本次随机接入过程相关的情况下，所述UE从所保存的缓存区中取出所述MAC PDU来发送，
    在所述UE在随机接入响应RAR中接收到一个上行授权UL grant时，所述UE从所保存的缓存区中取出所述MAC PDU来发送。
  10. 一种用户设备UE，包括：
    处理器；以及
    存储器，存储有指令；
    其中，所述指令在由所述处理器运行时执行根据权利要求1至9中任一项所述的随机接入方法。
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RU2841991C2 (ru) * 2021-12-10 2025-06-18 Бейдзин Сяоми Мобайл Софтвэр Ко., Лтд. Способ и устройство для определения информации о ресурсах для возможностей произвольного доступа, способ и устройство для указания информации о ресурсах для возможностей произвольного доступа

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