WO2021062767A1 - 基于非竞争的两步随机接入方法、装置、终端及存储介质 - Google Patents
基于非竞争的两步随机接入方法、装置、终端及存储介质 Download PDFInfo
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- the transceiver is configured to monitor the message B in the listening window of the message B;
- the base station When the base station fails to receive the load of message A in the non-contention-based two-step random access process, it sends message B for scheduling uplink resources to the UE to retransmit the load. After receiving the message B, the UE sends the message B according to the message B’s instructions and scheduling retransmit the load to the base station, thereby realizing the retransmission scheduling of the load in message A to complete the two-step random access process based on non-competition, and improve the access of the two-step random process based on non-competition. Entry success rate.
- Fig. 1 is a block diagram of a communication system provided by an exemplary embodiment of the present application
- Fig. 2 is a flowchart of a two-step random access method based on non-competition provided by an exemplary embodiment of the present application;
- Fig. 3 is a flowchart of a two-step random access method based on non-competition provided by another exemplary embodiment of the present application;
- FIG. 4 is a flowchart of a two-step random access method based on non-competition provided by another exemplary embodiment of the present application;
- Fig. 5 is a flowchart of a two-step random access method based on non-competition provided by another exemplary embodiment of the present application;
- Fig. 6 is a block diagram of a two-step random access device based on non-competition provided by an exemplary embodiment of the present application;
- Fig. 7 is a block diagram of a two-step random access device based on non-competition provided by another exemplary embodiment of the present application.
- FIG. 8 is a block diagram of a two-step random access device based on non-competition provided by another exemplary embodiment of the present application.
- FIG. 9 is a block diagram of a two-step random access device based on non-competition provided by another exemplary embodiment of the present application.
- Fig. 10 is a block diagram of a communication device provided by an exemplary embodiment of the present application.
- the number of terminals 20 is usually multiple, and one or more terminals 20 may be distributed in a cell managed by each access network device 11.
- the terminal 20 may include various handheld devices with wireless communication functions, vehicle-mounted devices, wearable devices, computing devices or other processing devices connected to a wireless modem, as well as various forms of UE, MS (Mobile Station, mobile station), etc. .
- the devices mentioned above are collectively referred to as terminals.
- the access network device 11 and the terminal 20 communicate with each other through a certain aerial technology, such as a Uu interface.
- the terminal 20 may access the cell by connecting to the access network device 11 of the cell, and the terminal 20 and the access network device 11
- the process of connecting is called a random access process.
- cell A and cell B are different cells
- the terminal 20 enters cell B from cell A, it needs to switch the connection with the access network device 11 of cell A to the access network device 11 of cell B
- the process in which the terminal 20 switches between different access network devices 11 is called a non-contention-based random access process.
- the non-competition-based random access process includes a non-competition-based four-step random access process and a non-competition-based two-step random access process.
- the technical solution of the embodiment of the present application can be applied to a non-competition-based two-step random access process. During the access process, it can also be applied to other non-competition-based random access processes in subsequent evolution, which is not limited in the embodiment of the present application.
- the UE sends a message 1 including a random access preamble to the base station.
- the base station After receiving the message 1, the base station sends a message 2 including a random access response to the UE, and the UE receives After message 2, message 3 including identity information (or other payload) is sent to the base station.
- message 3 including identity information (or other payload) is sent to the base station.
- the base station After receiving message 3, the base station sends message 4 including an access resolution message to the UE.
- the message 1 and message 3 sent by the UE to the base station are combined into message A, and the message 2 and message 2 sent by the base station to the UE Message 4 is merged into message B described below.
- the following exemplary embodiments of the present application only take the non-contention-based random access method as the non-contention-based two-step random access method and the application of the UE to access the base station as an example for illustration.
- personnel will easily think of using the non-competition-based random access method provided by this application as other non-competition-based random access methods for subsequent evolution, and applying it to other terminals to access other access methods.
- networked equipment such as MS accessing base stations, etc.
- these extension schemes should be included in the protection scope of this application.
- FIG. 2 shows a flowchart of a two-step random access method based on non-contention provided by an exemplary embodiment of the present application.
- This method can be applied to the system architecture shown in Figure 1.
- the method can include the following steps (201 ⁇ 208):
- Step 201 the UE sends a message A.
- message A is mainly configured in the handover (HandOver, HO) command message.
- the handover command is used to control the UE to perform cell handover, that is, the UE and the cell
- the connection between the base stations of A is switched to the connection between the UE and the base stations of cell B.
- Message A includes: random access preamble and payload.
- the random access preamble is a dedicated random access preamble configured by the network for the UE.
- the payload is transmitted on the dedicated uplink shared data channel PUSCH configured by the base station for the UE. It mainly includes the handover command completion message and possible user plane data.
- the UE After the MAC layer generates the MAC PDU corresponding to the payload of message A, the UE stores the MAC PDU (Media Access Control Protocol Data Unit, the protocol data unit of the media access control layer) in a fixed HARQ (Hybrid Auto Repeat Request, hybrid). Automatic retransmission request) buffer (buffer), such as message A buffer (or message 3 buffer).
- the HARQ process ID that transmits the MAC PDU is a fixed HARQ process ID, such as HARQ process ID 0.
- Step 202 The base station receives message A.
- step 203 the base station judges whether the load transmitted in the PUSCH of the message A is successfully received; if so, step 204 is executed; if not, step 207 is executed.
- Step 204 When the base station fails to successfully receive the load, it sends a message B for retransmitting the load.
- the base station After receiving message A, the base station decodes or decodes message A.
- the base station sends message B to the UE to schedule the retransmission of the load.
- Message B is the response of the base station to message A, and message B is used to directly or indirectly schedule uplink resources for retransmission of the load, so as to achieve the purpose of retransmission of the load.
- message A includes the UE-specific random access preamble
- the base station can Identify the UE according to message A, and obtain the C-RNTI of the UE. Therefore, regardless of whether the base station can decode the load transmitted in the PUSCH, the base station can send a message B to the UE.
- the message B includes a random access response and a random access method.
- Step 205 The terminal monitors the message B in the listening window of the message B.
- the UE after the UE finishes sending message A, it will start a message B listening window.
- the UE can blindly check the PDCCH (Physical Downlink Control Channel), where: PDCCH is scrambled through RNTI (Radio Network Temporary Identifier), that is, PDCCH is addressed through RNTI.
- PDCCH Physical Downlink Control Channel
- RNTI Radio Network Temporary Identifier
- step 204 can be implemented after step 201, after step 202, or after step 203.
- the drawing of step 204 after step 201 in FIG. 2 is only an exemplary description. The application is not limited.
- Step 206 The terminal retransmits the payload.
- the terminal After receiving the message B sent by the base station, the terminal can retransmit the load according to the uplink resources directly or indirectly scheduled by the message B to complete the non-contention-based two-step random access process, that is, the UE completes the cell handover.
- Step 207 When the base station successfully receives the load, it sends a message B for indicating permission to access the base station.
- the message B used to indicate permission to access the base station does not carry the UL grant.
- Step 208 The terminal receives message B.
- the technical solution provided by the embodiments of the present application when the base station fails to successfully receive the load of the message A in the non-contention-based two-step random access process, it sends the uplink resource for scheduling to the UE to achieve load control. Retransmitted message B. After receiving the message B, the UE retransmits the load to the base station according to the instructions and scheduling of the message B, thereby realizing the retransmission scheduling of the load in the message A to complete the two-step random access based on non-contention The process improves the access success rate of a two-step random process based on non-competition.
- the DCI in message B is scrambled by C-RNTI, and the DCI schedules downlink transmission;
- the DCI in message B is scrambled by MsgB-RNTI (such as RA-RNTI), and the DCI schedules downlink transmission.
- MsgB-RNTI such as RA-RNTI
- the DCI in message B is scrambled by C-RNTI, and the DCI schedules uplink transmission.
- the above-mentioned method may include the following steps:
- Step 201 the UE sends a message A.
- Message A includes: random access preamble and payload, where the random access preamble is a dedicated random access preamble configured by the network for the UE, and the payload is transmitted on the dedicated uplink shared data channel PUSCH configured by the network for the UE. It mainly includes the handover command completion message and possible user plane data.
- the UE After the MAC layer generates the MAC PDU corresponding to the message A payload, the UE saves the MAC PDU in a MAC PDU in a fixed HARQ buffer, such as the message A buffer (or the message 3 buffer).
- the HARQ process ID that transmits the MAC PDU is a fixed HARQ process ID, such as HARQ process ID 0.
- Step 202 The base station receives message A.
- step 203 the base station judges whether the load transmitted in the PUSCH of the message A is successfully received; if so, step 204 is executed; if not, step 207 is executed.
- Step 2041 The base station determines the C-RNTI of the UE according to the UE-specific random access preamble.
- the base station can determine the C-RNTI of the UE according to the UE-specific random access preamble.
- the C-RNTI can be used to address the PDCCH, that is, it can be scrambled. PDCCH.
- Step 2042 The base station sends a message B, where the message B is a PDCCH scrambled by C-RNTI.
- the PDCCH includes DCI (Downlink Control Information, downlink control command), which is used to schedule downlink transmission.
- DCI is the downlink control information sent by the base station to the UE.
- the DCI can be used to schedule uplink transmission or Can be used to schedule downlink transmission.
- the base station When DCI is used for scheduling downlink transmission, the base station sends downlink information to the UE on the downlink resources scheduled by the DCI; when the DCI is used for scheduling uplink transmission, the UE sends uplink information to the base station on the uplink resources scheduled by the DCI.
- Step 2051 the UE monitors the message B in the listening window of the message B;
- the UE receives message B, obtains DCI according to the PDCCH in message B, and receives downlink data according to DCI scheduling.
- the UE will start a listening window after sending message A. In this listening window, the UE can blindly detect the PDCCH.
- the PDCCH is scrambled by C-RNTI, and the DCI contained in the PDCCH contains DA (Downlink Assignment, downlink assignment), the DA is scheduled for PDSCH (Physical Downlink Shared Channel, physical downlink shared channel).
- DA Downlink Assignment, downlink assignment
- PDSCH Physical Downlink Shared Channel, physical downlink shared channel
- Step 2043 The base station sends a MAC PDU on the downlink resource scheduled by the PDCCH.
- the base station sends the MAC PDU on the downlink resources scheduled by the DCI in the PDCCH.
- Step 2052 The UE receives and decodes the MAC PDU.
- the MAC PDU may include TAC (Timing Alignment Command), or TAC and UL grant (Up Link grant, uplink scheduling resource). ), can also include fallback RAR (fallback RAR).
- TAC Transmission Alignment Command
- TAC and UL grant Up Link grant, uplink scheduling resource
- fallback RAR fallback RAR
- the TAC and UL grant can carry the same MAC CE (Media Access Control Control Element, Media Access Control Element) in the MAC PDU. It can also be carried in different MAC CEs in MAC PDU.
- TAC is a timing alignment command used to align the time domain timing of the base station and the UE.
- the UL grant is used to schedule uplink resources for retransmission of the load.
- the MAC PDU includes TAC and UL grant, or the MAC PDU includes a fallback RAR, it indicates that the UE needs to retransmit the load.
- Step 206 If the MAC PDU carries a UL grant, the UE retransmits the load on the uplink resource scheduled by the UL grant.
- the UE After the UE decodes the MAC PDU, if the MAC PDU carries the UL grant, it indicates that the UE needs to retransmit the load to the base station, and the UE retransmits the load according to the uplink resource scheduled by the UL grant.
- the MAC layer of the UE obtains the stored MAC PDU from the message A buffer (or the message 3 buffer) storing the payload, and transmits the MAC PDU in the UL grant.
- Step 207 When the base station successfully receives the load, it sends a message B for indicating permission to access the base station.
- the message B used to indicate permission to access the base station is also a PDCCH scrambled by using C-RNTI, and the DCI in the PDCCH is used to schedule downlink transmission.
- the MAC PDU sent by the downlink transmission scheduled by the DCI includes TAC, but does not include UL grant or fallback RAR, it means that the base station has successfully received the load. At this time, the UE does not need to retransmit the load, and the UE clears it for transmission. After loading the HARQ buffer, the non-contention-based two-step random access process can be completed.
- the technical solution provided by the embodiments of this application carries a PDCCH including DCI in message B.
- the base station sends a MAC PDU on the downlink resources scheduled by the DCI, and the UE decodes the MAC PDU after receiving the MAC PDU. Determine whether to retransmit the load according to the content of the MAC PDU indicated by the decoding result, and provide a method to determine whether the load needs to be retransmitted. If the load needs to be retransmitted, the UE retransmits the load to the base station to achieve non-contention based The two-step random access process.
- steps 2041 to 2043 can be implemented alternatively to the above method, which may include the following steps: As shown in Figure 4:
- msgB-RNTI is the temporary wireless network identifier corresponding to message B.
- the base station determines the msgB-RNTI of the UE according to the random access time-frequency resource position used by the UE to transmit the dedicated random access preamble, and the msgB-RNTI can scramble the PDCCH.
- the base station determines the C-RNTI of the UE according to the UE-specific random access preamble, and the C-RNTI can scramble the PDCCH. That is, when the base station successfully receives the load, it uses the C-RNTI to scramble the PDCCH; when the base station fails to receive the load, it uses the msgB-RNTI to scramble the PDCCH.
- the calculation method of msgB-RNTI is the same as the calculation method of RA-RNTI.
- RA-RNTI is a temporary wireless network identification in a four-step random access mechanism based on non-competition.
- the RA-RNTI is determined by the PRACH (Physical Random Access Channel) time-frequency resource location that carries message 1.
- PRACH Physical Random Access Channel
- the calculation formula of the msgB-RNTI is as follows:
- the TAC and UL grant can carry the same MAC CE (Media Access Control Control Element, Media Access Control Element) in the MAC PDU. It can also be carried in different MAC CEs in MAC PDU.
- TAC is a time alignment command used to align the time domain timing of the base station and the UE.
- the MAC PDU includes TAC and UL grant, or the MAC PDU includes a fallback RAR, it indicates that the UE needs to retransmit the load.
- Step 201 the UE sends a message A.
- Message A includes: random access preamble and payload, where the random access preamble is a dedicated random access preamble configured by the network for the UE, and the payload is transmitted on the dedicated uplink shared data channel PUSCH configured by the network for the UE. It mainly includes the handover command completion message and possible user plane data.
- the UE After the payload generates a MAC PDU at the MAC layer, the UE saves the MAC PDU in a MAC PDU in a fixed HARQ buffer, such as the message A buffer (or the message 3 buffer).
- the HARQ process ID that transmits the MAC PDU is a fixed HARQ process ID, such as HARQ process ID 0.
- step 203 the base station judges whether the load transmitted in the PUSCH of the message A is successfully received; if so, step 204 is executed; if not, step 207 is executed.
- the UE will start a listening window after sending message A. In this listening window, the UE can blindly detect the PDCCH.
- the PDCCH is scrambled by C-RNTI, and the DCI contained in the PDCCH includes UL grant.
- the UE retransmits the load on the uplink resource scheduled by the UL grant.
- Step 208 The terminal receives message B.
- the technical solution of the present application is introduced and explained only from the perspective of the interaction between the base station and the UE.
- the above steps performed by the base station can be separately implemented as a two-step random access method based on non-competition on the base station side, and the steps performed by the UE concerned can be separately implemented as a two-step random access method based on non-contention on the UE side.
- FIG. 6 shows a block diagram of a non-contention-based two-step random access device provided by an exemplary embodiment of the present application.
- the device 600 has the function of realizing the above-mentioned method embodiment on the UE side, and the function can be realized by hardware, or by hardware executing corresponding software.
- the apparatus 600 may include: a sending module 610, a monitoring module 620, and a retransmission module 630.
- the sending module 610 is configured to send a message A, the message A includes: a random access preamble and a payload, where the random access preamble is a UE-specific random access preamble, and the payload is on the UE-specific uplink shared channel PUSCH transmission.
- the monitoring module 620 is configured to monitor the message B in the monitoring window of the message B.
- the retransmission module 630 is configured to retransmit the load when the message B is used to schedule the retransmission of the load.
- the device 600 further includes a receiving module 640: the receiving module 640 is configured to: when the message B is a downlink control channel PDCCH scrambled by the cell radio network temporary identifier C-RNTI, And when the PDCCH schedules downlink transmission, the protocol data unit MAC PDU of the media intervention control layer is received according to the downlink resource scheduled by the PDCCH; the retransmission module 630 is configured to carry the uplink scheduling authorization UL in the MAC PDU When granting, the load is retransmitted on the uplink resource scheduled by the UL grant.
- the receiving module 640 is configured to: when the message B is a downlink control channel PDCCH scrambled by the cell radio network temporary identifier C-RNTI, And when the PDCCH schedules downlink transmission, the protocol data unit MAC PDU of the media intervention control layer is received according to the downlink resource scheduled by the PDCCH; the retransmission module 630 is configured to carry the uplink scheduling authorization UL in the MAC PDU When granting
- the apparatus 600 further includes a receiving module 640: the receiving module 640 is configured to: when the message B is the downlink control channel PDCCH scrambled by the wireless network temporary identifier msgB-RNTI of the message B And when the PDCCH schedules downlink transmission, it receives the protocol data unit MAC PDU of the media intervention control layer according to the downlink resource scheduled by the PDCCH; the retransmission module 630 is configured to carry the uplink scheduling authorization in the MAC PDU When the UL grant, the load is retransmitted on the uplink resource scheduled by the UL grant.
- the receiving module 640 is configured to: when the message B is the downlink control channel PDCCH scrambled by the wireless network temporary identifier msgB-RNTI of the message B And when the PDCCH schedules downlink transmission, it receives the protocol data unit MAC PDU of the media intervention control layer according to the downlink resource scheduled by the PDCCH; the retransmission module 630 is configured to carry the uplink scheduling
- the calculation method of the msgB-RNTI is the same as the calculation method of the random access wireless network temporary identifier RN-RNTI.
- the MAC PDU also carries: a timing alignment command TAC.
- the retransmission module 630 is further configured to: when the message B is a downlink control channel PDCCH scrambled by the cell radio network temporary identification C-RNTI, and the PDCCH is used for scheduling uplink transmission, according to the The UL grant indicated by the PDCCH retransmits the payload; wherein the hybrid automatic repeat request HARQ process ID associated with the UL grant is the same as the fixed HARQ process ID used by the payload, or the PDCCH carries a new data indication, so The new data indication is used to indicate retransmission.
- the technical solution provided by the embodiments of the present application sends a message B for scheduling uplink resources to the UE to retransmit the load when the base station fails to successfully receive the load, and the UE sends the message B to the base station after receiving the message B.
- the load is retransmitted, thereby realizing the retransmission scheduling of the load to complete the two-step random access process based on non-competition, and improve the access success rate of the two-step random process based on non-competition.
- FIG. 8 shows a block diagram of a two-step random access device based on non-contention provided by an exemplary embodiment of the present application.
- the device 800 has the function of realizing the above method embodiment on the base station side, and the function can be realized by hardware, or by hardware executing corresponding software.
- the device 800 may include: a message receiving module 810 and a message sending module 820.
- the message receiving module 810 is configured to receive message A, the message A includes: a random access preamble and a payload, where the random access preamble is a UE-specific random access preamble, and the payload is on the UE-specific uplink shared channel PUSCH Upload
- the message sending module 820 includes: an identification determining module 821, configured to determine the message B wireless network temporary identifier msgB-RNTI of the UE according to the random access preamble;
- the module 822 is used to send message B, the message B is a downlink control channel PDCCH scrambled by the wireless network temporary identifier msgB-RNTI of the message B, and the downlink control information DCI in the PDCCH is used to schedule downlink transmission;
- data retransmission module 823 configured to receive a protocol data unit MAC PDU of the media intervention control layer on the downlink resource scheduled by the PDCCH, where the MAC PDU carries an uplink scheduling authorization UL grant.
- the technical solution provided by the embodiments of the present application sends a message B for scheduling uplink resources to the UE to retransmit the load when the base station fails to successfully receive the load, and the UE sends the message B to the base station after receiving the message B.
- the load is retransmitted, thereby realizing the retransmission scheduling of the load to complete the two-step random access process based on non-competition, and improve the access success rate of the two-step random process based on non-competition.
- FIG. 10 shows a block diagram of a communication device provided by an exemplary embodiment of the present application.
- the communication device may be the access network device 11 in the block diagram of the communication system shown in FIG. 1, such as a base station, which is used to execute the aforementioned two-step random access method based on non-competition on the base station side; or it may be as shown in FIG.
- the terminal 20 in the block diagram of the communication system, such as a UE is used to execute the aforementioned two-step random access method based on non-contention on the UE side.
- a base station such as a base station
- the terminal 20 in the block diagram of the communication system such as a UE, is used to execute the aforementioned two-step random access method based on non-contention on the UE side.
- the receiver 1002 and the transmitter 1003 may be implemented as a transceiver 1006, which may be a communication chip.
- the memory 1004 can be implemented by any type of volatile or non-volatile storage device or a combination thereof.
- the volatile or non-volatile storage device includes but is not limited to: RAM (Random-Access Memory, random access memory) And ROM (Read-Only Memory), EPROM (Erasable Programmable Read-Only Memory, Erasable Programmable Read-Only Memory), EEPROM (Electrically Erasable Programmable Read-Only Memory, Electrically Erasable Programmable Read-Only Memory) Storage), flash memory or other solid-state storage technology, CD-ROM, DVD (Digital Video Disc, high-density digital video disc) or other optical storage, tape cartridges, magnetic tape, disk storage or other magnetic storage devices. among them:
- the processor 1001 is configured to retransmit the payload according to the message B monitored by the transceiver.
- the transceiver 1006 is configured to: when the message B is a downlink control channel PDCCH scrambled by the message B radio network temporary identifier msgB-RNTI, and the PDCCH is used for scheduling downlink transmission, according to the PDCCH
- the scheduled downlink resource receives the protocol data unit MAC PDU of the media intervention control layer; the processor 1001 is configured to, when the uplink scheduling authorization UL grant is carried in the MAC PDU, reproduce the uplink resource scheduled by the UL grant Pass the load.
- the MAC PDU also carries: a timing alignment command TAC.
- the processor is configured to, when the message B is a downlink control channel PDCCH scrambled by the cell radio network temporary identifier C-RNTI, and the PDCCH is used to schedule uplink transmission, according to the indication of the PDCCH UL grants retransmission of the payload; wherein, the PDCCH carries a new data indication, and the new data indication is used to indicate retransmission.
- the message B is a downlink control channel PDCCH scrambled by the cell radio network temporary identifier C-RNTI
- the PDCCH is used to schedule uplink transmission, according to the indication of the PDCCH UL grants retransmission of the payload; wherein, the PDCCH carries a new data indication, and the new data indication is used to indicate retransmission.
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Abstract
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Claims (25)
- 一种基于非竞争的两步随机接入方法,其特征在于,所述方法应用于用户设备UE中,所述方法包括:发送消息A,所述消息A包括:随机接入前导码和载荷,所述随机接入前导码为所述UE专用的随机接入前导码,所述载荷在所述UE专用的上行共享信道PUSCH上传输;在消息B的监听窗口中,监听所述消息B;根据所述消息B重传所述载荷。
- 根据权利要求1所述的方法,其特征在于,所述当所述消息B用于调度所述载荷进行重传时,重传所述载荷,包括:当所述消息B为小区无线网络临时标识C-RNTI加扰的下行控制信道PDCCH,且所述PDCCH用于调度下行传输时,根据所述PDCCH调度的下行资源接收媒体介入控制层的协议数据单元MAC PDU;在所述MAC PDU中携带有上行调度授权UL grant时,在所述UL grant调度的上行资源上重传所述载荷。
- 根据权利要求1所述的方法,其特征在于,所述当所述消息B用于调度所述载荷进行重传时,重传所述载荷,包括:当所述消息B为消息B无线网络临时标识msgB-RNTI加扰的下行控制信道PDCCH,且所述PDCCH用于调度下行传输时,根据所述PDCCH调度的下行资源接收媒体介入控制层的协议数据单元MAC PDU;在所述MAC PDU中携带有上行调度授权UL grant时,在所述UL grant调度的上行资源上重传所述载荷。
- 根据权利要求3所述的方法,其特征在于,所述msgB-RNTI的计算方式与随机接入无线网络临时标识RN-RNTI的计算方式相同。
- 根据权利要求2至4任一项所述的方法,其特征在于,所述MAC PDU中还携带有:定时对齐命令TAC。
- 根据权利要求5所述的方法,其特征在于,所述TAC与所述UL grant携带在所述MAC PDU中的相同或不同的媒体介入控制层的控制单元MAC CE;或,所述TAC与所述UL grant携带在所述MAC PDU中的回退随机接入响应回退RAR。
- 根据权利要求1所述的方法,其特征在于,所述当所述消息B用于调度所述载荷进行重传时,重传所述载荷,包括:当所述消息B为小区无线网络临时标识C-RNTI加扰的下行控制信道PDCCH,且所述PDCCH用于调度上行传输时,根据所述PDCCH指示的UL grant重传所述载荷;其中,所述UL grant关联的混合自动重传请求HARQ进程ID与所述载荷使用的HARQ进程ID相同。
- 根据权利要求1所述的方法,其特征在于,所述根据所述消息B重传所述载荷,包括:当所述消息B为小区无线网络临时标识C-RNTI加扰的下行控制信道PDCCH,且所述PDCCH用于调度上行传输时,根据所述PDCCH指示的UL grant重传所述载荷;其中,所述PDCCH携带新数据指示,所述新数据指示用于指示重传。
- 一种基于非竞争的两步随机接入装置,其特征在于,所述装置包括:发送模块,用于发送消息A,所述消息A包括:随机接入前导码和载荷,所述随机接入前导码为所述UE专用的随机接入前导码,所述载荷在所述UE专用的上行共享信道PUSCH上传输;监听模块,用于在消息B的监听窗口中,监听所述消息B;重传模块,用于根据所述消息B重传所述载荷。
- 根据权利要求9所述的装置,其特征在于,所述装置还包括接收模块:所述接收模块,用于当所述消息B为小区无线网络临时标识C-RNTI加扰的下行控制信道PDCCH,且所述PDCCH用于调度下行传输时,根据所述PDCCH调度的下行资源接收媒体介入控制层的协议数据单元MAC PDU;所述重传模块,用于在所述MAC PDU中携带有上行调度授权UL grant时,在所述UL grant调度的上行资源上重传所述载荷。
- 根据权利要求9所述的装置,其特征在于,所述装置还包括接收模块:所述接收模块,用于当所述消息B为消息B无线网络临时标识msgB-RNTI加扰的下行控制信道PDCCH,且所述PDCCH用于调度下行传输时,根据所述PDCCH调度的下行资源接收媒体介入控制层的协议数据单元MAC PDU;所述重传模块,用于在所述MAC PDU中携带有上行调度授权UL grant时,在所述UL grant调度的上行资源上重传所述载荷。
- 根据权利要求11所述的装置,其特征在于,所述msgB-RNTI的计算方式与随机接入无线网络临时标识RN-RNTI的计算方式相同。
- 根据权利要求10至12任一项所述的装置,其特征在于,所述MAC PDU中还携带有:定时对齐命令TAC。
- 根据权利要求13所述的装置,其特征在于,所述TAC与所述UL grant携带在所述MAC PDU中的相同或不同的媒体介入控制层的控制单元MAC CE;或,所述TAC与所述UL grant携带在所述MAC PDU中的回退随机接入响应回退RAR。
- 根据权利要求9所述的装置,其特征在于,所述重传模块还用于:当所述消息B为小区无线网络临时标识C-RNTI加扰的下行控制信道PDCCH,且所述PDCCH用于调度上行传输时,根据所述PDCCH指示的UL grant重传所述载荷;其中,所述UL grant关联的混合自动重传请求HARQ进程ID与所述载荷使用的HARQ进程ID相同。
- 根据权利要求9所述的装置,其特征在于,所述重传模块还用于:当所述消息B为小区无线网络临时标识C-RNTI加扰的下行控制信道PDCCH,且所述PDCCH用于调度上行传输时,根据所述PDCCH指示的UL grant重传所述载荷;其中,所述PDCCH携带新数据指示,所述新数据指示用于指示重传。
- 一种通信设备,其特征在于,所述通信设备包括处理器和与所述处理器相连的收发器;其中:所述收发器,用于发送消息A,所述消息A包括:随机接入前导码和载荷,所述随机接入前导码为所述UE专用的随机接入前导码,所述载荷在所述UE专用的上行共享信道PUSCH上传输;所述收发器,用于在消息B的监听窗口中,监听所述消息B;所述处理器,用于根据所述收发器监听到的所述消息B重传所述载荷。
- 根据权利要求17所述的通信设备,其特征在于,所述收发器,用于当所述消息B为小区无线网络临时标识C-RNTI加扰的下行控制信道PDCCH,且所述PDCCH用于调度下行传输时,根据所述PDCCH调度的下行资源接收媒体 介入控制层的协议数据单元MAC PDU;所述处理器,用于在所述MAC PDU中携带有上行调度授权UL grant时,在所述UL grant调度的上行资源上重传所述载荷。
- 根据权利要求17所述的通信设备,其特征在于,所述收发器,用于当所述消息B为消息B无线网络临时标识msgB-RNTI加扰的下行控制信道PDCCH,且所述PDCCH用于调度下行传输时,根据所述PDCCH调度的下行资源接收媒体介入控制层的协议数据单元MAC PDU;所述处理器,用于在所述MAC PDU中携带有上行调度授权UL grant时,在所述UL grant调度的上行资源上重传所述载荷。
- 根据权利要求19所述的通信设备,其特征在于,所述msgB-RNTI的计算方式与随机接入无线网络临时标识RN-RNTI的计算方式相同。
- 根据权利要求18至20任一项所述的通信设备,其特征在于,所述MAC PDU中还携带有:定时对齐命令TAC。
- 根据权利要求21所述的通信设备,其特征在于,所述TAC与所述UL grant携带在所述MAC PDU中的相同或不同的媒体介入控制层的控制单元MAC CE;或,所述TAC与所述UL grant携带在所述MAC PDU中的回退随机接入响应回退RAR。
- 根据权利要求17所述的通信设备,其特征在于,所述处理器,用于当所述消息B为小区无线网络临时标识C-RNTI加扰的下行控制信道PDCCH,且所述PDCCH用于调度上行传输时,根据所述PDCCH指示的UL grant重传所述载荷;其中,所述UL grant关联的混合自动重传请求HARQ进程ID与所述载荷使用的HARQ进程ID相同。
- 根据权利要求17所述的通信设备,其特征在于,所述处理器,用于当所述消息B为小区无线网络临时标识C-RNTI加扰的下行控制信道PDCCH,且所述PDCCH用于调度上行传输时,根据所述PDCCH指示的UL grant重传所述载荷;其中,所述PDCCH携带新数据指示,所述新数据指示用于指示重传。
- 一种计算机可读存储介质,其特征在于,所述计算机可读存储介质中存储有至少一条指令、至少一段程序、代码集或指令集,所述至少一条指令、所述至少一段程序、所述代码集或所述指令集由处理器加载并执行以实现如权利要求1至7任一所述的基于非竞争的两步随机接入方法。
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