A random access method, a random access device and a storage medium

Abstract

The present disclosure relates to a random access method, a random access device and a storage medium. The random access method is applied to a terminal, and the method comprises: determining a semi-static transmission resource; and transmitting an uplink message for random access based on the semi-static transmission resource. The present disclosure can reduce the steps of random access and save the energy consumption of the terminal.

Description

Technical Field

[0001] The present disclosure relates to the field of wireless communication technologies, and in particular to a random access method, a random access device, and a storage medium. Background Art

[0002] In related technologies, a terminal may need to perform a random access procedure using a contention-based random access method, such as a two-step random access method or a four-step random access method. Regardless of the random access method used, random access contention resolution must be performed based on the terminal's own identifier. If the random access contention resolution is successful, the terminal enters the connected state.

[0003] The contention-based random access method has complex steps, especially the 4-step random access method, which has a large random access delay and high terminal power consumption. Summary of the Invention

[0004] To overcome the problems existing in the related art, the present disclosure provides a random access method, a random access device and a storage medium.

[0005] According to a first aspect of an embodiment of the present disclosure, a random access method is provided, applied to a terminal, the method including:

[0006] Determining a semi-static transmission resource; and sending an uplink message for random access based on the semi-static transmission resource.

[0007] In one implementation, the uplink message includes a radio resource control (RRC) connection recovery request and / or an RRC connection establishment request.

[0008] In one embodiment, before sending an uplink message for random access based on the semi-static transmission resource, the method further includes:

[0009] Determine whether the timing advance value for random access uplink data transmission is valid.

[0010] In one embodiment, the semi-static transmission resource is a semi-static transmission resource used for transmitting inactive small data packets.

[0011] In one implementation, the uplink message does not include the first identification information of the terminal, and the first identification information of the terminal is the identification information of the terminal in an RRC inactive state.

[0012] In one implementation, the first identification information of the terminal is determined based on a location of a semi-static transmission resource that carries the uplink message.

[0013] In one embodiment, the method further comprises:

[0014] Receive downlink control information DCI; and send a reception confirmation message in response to the downlink data transmission scheduled by the DCI including RRC connection recovery information or RRC connection establishment information.

[0015] In one implementation, the RRC connection recovery message or the RRC connection establishment message does not include contention resolution information.

[0016] In one embodiment, the method further comprises:

[0017] Based on the received indication information or communication protocol, second identification information of the terminal is acquired, where the second identification information of the terminal is used for data scheduling and data transmission.

[0018] According to a second aspect of an embodiment of the present disclosure, a random access method is provided, applied to a network device, the method comprising:

[0019] An uplink message for random access sent by a receiving terminal based on semi-static transmission resources.

[0020] In one implementation, the uplink message includes an RRC connection recovery request and / or an RRC connection establishment request.

[0021] In one embodiment, the semi-static transmission resource is a semi-static transmission resource used for transmitting inactive small data packets.

[0022] In one implementation, the uplink message does not include the first identification information of the terminal, and the first identification information of the terminal is the identification information of the terminal in an RRC inactive state.

[0023] In one implementation, the first identification information of the terminal is determined based on a semi-static resource location that carries the uplink message.

[0024] In one embodiment, the method further comprises:

[0025] In response to receiving the uplink message, DCI is sent, where downlink data transmission scheduled by the DCI includes RRC connection recovery information or RRC connection establishment information indicating the terminal.

[0026] In one implementation, the RRC connection recovery message or the RRC connection establishment message does not include contention resolution information.

[0027] In one embodiment, the method further comprises:

[0028] An indication message is sent, where the indication message includes second identification information of the terminal, and the second identification information of the terminal is used for data scheduling and data transmission.

[0029] According to a third aspect of an embodiment of the present disclosure, a random access apparatus is provided, applied to a terminal, the apparatus including:

[0030] The processing module is used to determine the semi-static transmission resources; the sending module is used to send an uplink message for random access based on the semi-static transmission resources.

[0031] In one implementation, the uplink message includes a radio resource control (RRC) connection recovery request and / or an RRC connection establishment request.

[0032] In one embodiment, before sending an uplink message for random access based on the semi-static transmission resource, the method further includes:

[0033] Determine whether the timing advance value for random access uplink data transmission is valid.

[0034] In one embodiment, the semi-static transmission resource is a semi-static transmission resource used for transmitting inactive small data packets.

[0035] In one implementation, the uplink message does not include the first identification information of the terminal, and the first identification information of the terminal is the identification information of the terminal in an RRC inactive state.

[0036] In one implementation, the first identification information of the terminal is determined based on a location of a semi-static transmission resource that carries the uplink message.

[0037] In one embodiment, the device further includes: a receiving module;

[0038] The receiving module is configured to receive downlink control information DCI; and send a reception confirmation message in response to downlink data transmission scheduled by the DCI including RRC connection recovery information or RRC connection establishment information.

[0039] In one implementation, the RRC connection recovery message or the RRC connection establishment message does not include contention resolution information.

[0040] In one embodiment, the processing module is further configured to:

[0041] Based on the received indication information or communication protocol, second identification information of the terminal is acquired, where the second identification information of the terminal is used for data scheduling and data transmission.

[0042] According to a fourth aspect of an embodiment of the present disclosure, a random access apparatus is provided, applied to a network device, the apparatus comprising:

[0043] The receiving module is used to receive an uplink message for random access sent by a terminal based on semi-static transmission resources.

[0044] In one implementation, the uplink message includes an RRC connection recovery request and / or an RRC connection establishment request.

[0045] In one embodiment, the semi-static transmission resource is a semi-static transmission resource used for transmitting inactive small data packets.

[0046] In one implementation, the uplink message does not include the first identification information of the terminal, and the first identification information of the terminal is the identification information of the terminal in an RRC inactive state.

[0047] In one implementation, the first identification information of the terminal is determined based on a semi-static resource location that carries the uplink message.

[0048] In one embodiment, the device further includes: a sending module;

[0049] The sending module is configured to send DCI in response to receiving the uplink message, where the downlink data transmission scheduled by the DCI includes RRC connection recovery information or RRC connection establishment information indicating the terminal.

[0050] In one implementation, the RRC connection recovery message or the RRC connection establishment message does not include contention resolution information.

[0051] In one embodiment, the sending module is further configured to:

[0052] An indication message is sent, where the indication message includes second identification information of the terminal, and the second identification information of the terminal is used for data scheduling and data transmission.

[0053] According to a fifth aspect of an embodiment of the present disclosure, a random access apparatus is provided, including:

[0054] A processor; a memory for storing processor-executable instructions; wherein the processor is configured to: execute the random access method described in the first aspect or any one of the embodiments of the first aspect, or execute the random access method described in the second aspect or any one of the embodiments of the second aspect.

[0055] According to a sixth aspect of an embodiment of the present disclosure, a storage medium is provided, in which instructions are stored. When the instructions in the storage medium are executed by a processor of a mobile terminal, the mobile terminal is enabled to execute the random access method described in the first aspect or any one of the embodiments of the first aspect, or the mobile terminal is enabled to execute the random access method described in the second aspect or any one of the embodiments of the first aspect.

[0056] The technical solution provided by the embodiments of the present disclosure may have the following beneficial effects: the terminal sends an uplink message for random access based on semi-static transmission resources, which can reduce the steps of random access and save terminal energy consumption.

[0057] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0058] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and, together with the description, serve to explain the principles of the present disclosure.

[0059] Figure 1 The present invention is a diagram showing an architecture of a communication system between a network device and a terminal according to an exemplary embodiment.

[0060] Figure 2 The figure is a flowchart showing a random access method according to an exemplary embodiment.

[0061] Figure 3 The figure is a flowchart of a random access method according to an exemplary embodiment.

[0062] Figure 4 The figure is a flowchart of a random access method according to an exemplary embodiment.

[0063] Figure 5 The figure is a flowchart of a random access method according to an exemplary embodiment.

[0064] Figure 6 The figure is a flowchart of a random access method according to an exemplary embodiment.

[0065] Figure 7 The figure is a block diagram of a random access apparatus according to an exemplary embodiment.

[0066] Figure 8 The figure is a block diagram of a random access apparatus according to an exemplary embodiment.

[0067] Figure 9 The present invention is a block diagram showing a device for random access according to an exemplary embodiment.

[0068] Figure 10 The present invention is a block diagram showing a device for random access according to an exemplary embodiment. DETAILED DESCRIPTION

[0069] Exemplary embodiments will be described in detail herein, with examples illustrated in the accompanying drawings. In the following description, when referring to the drawings, identical numerals in different figures represent identical or similar elements, unless otherwise indicated. The embodiments described in the following exemplary embodiments are not intended to represent all possible embodiments consistent with the present disclosure. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present disclosure, as detailed in the appended claims.

[0070] Figure 1 This is a diagram showing a communication system architecture of a network device and a terminal according to an exemplary embodiment. The communication method provided by the present disclosure can be applied to Figure 1 As shown in the communication system architecture diagram. Figure 1 As shown, the network side equipment can be based on Figure 1 The architecture shown sends signaling.

[0071] It is understandable that Figure 1 The communication system of the network equipment and the terminal shown is only for schematic illustration. The wireless communication system may also include other network equipment, such as core network equipment, wireless relay equipment and wireless backhaul equipment. Figure 1 The embodiment of the present disclosure does not limit the number of network devices and terminals included in the wireless communication system.

[0072] It can be further understood that the wireless communication system of the embodiment of the present disclosure is a network that provides wireless communication functions. The wireless communication system can adopt different communication technologies, such as code division multiple access (CDMA), wideband code division multiple access (WCDMA), time division multiple access (TDMA), frequency division multiple access (FDMA), orthogonal frequency-division multiple access (OFDMA), single carrier frequency division multiple access (SC-FDMA), carrier sense multiple access / collision avoidance (Carrier Sense Multiple Access with Collision Avoidance). According to factors such as the capacity, rate, and latency of different networks, the network can be divided into 2G (English: generation) network, 3G network, 4G network or future evolution network, such as 5G network, which can also be called New Radio (NR). For the convenience of description, the present disclosure sometimes refers to the wireless communication network as simply a network.

[0073] Furthermore, the network devices involved in the present disclosure may also be referred to as wireless access network devices. The wireless access network devices may be: base stations, evolved node Bs (base stations), home base stations, access points (APs) in wireless fidelity (WIFI) systems, wireless relay nodes, wireless backhaul nodes, transmission points (TPs) or transmission and reception points (TRPs), etc. They may also be gNBs in NR systems, or they may be components or part of devices constituting base stations. In the case of a vehicle-to-everything (V2X) communication system, the network devices may also be vehicle-mounted devices. It should be understood that in the embodiments of the present disclosure, there is no limitation on the specific technology and specific device form used by the network devices.

[0074] Furthermore, the terminal involved in the present disclosure may also be referred to as a terminal device, user equipment (UE), mobile station (MS), mobile terminal (MT), etc., which is a device that provides voice and / or data connectivity to users. For example, the terminal can be a handheld device with wireless connection function, a vehicle-mounted device, etc. At present, some examples of terminals are: smart phones (Mobile Phones), pocket personal computers (PPCs), handheld computers, personal digital assistants (PDAs), laptops, tablet computers, wearable devices, or vehicle-mounted devices, etc. In addition, when it is a vehicle-to-everything (V2X) communication system, the terminal device can also be a vehicle-mounted device. It should be understood that the embodiments of the present disclosure do not limit the specific technology and specific device form adopted by the terminal.

[0075] Discussions regarding New Radio (NR) have proposed supporting Small Data Transmission (SDT) in the inactive state to save terminal energy. This allows terminals to complete data transmission without entering the connected state, avoiding waste of time and frequency resources, shortening data transmission latency, and saving terminal energy. SDT generally supports two methods: random access-based SDT and semi-static configuration-based SDT.

[0076] With semi-static SDT, when the base station transitions from the Radio Resource Control (RRC) connected state to the RRC inactive state, it carries information such as the semi-static time-frequency domain resource allocation and timing advance (TA) validity determination required for SDT transmission in the RRC release message. When a terminal has uplink data to transmit in the inactive state, it first determines TA validity, coverage conditions, and packet size. If the TA is valid, coverage conditions, and packet size meet the respective thresholds, the small data packet is transmitted using the semi-static resources configured by the base station.

[0077] SDT based on the random access process is divided into two types: 2-step Random Access Channel (RACH)-based SDT and 4-step RACH-based SDT. In 2-step RACH-based SDT, small data packets are transmitted in the Physical Uplink Shared Channel (PUSCH) resources of the Random Access Request message (msgA); in 4-step RACH-based SDT, small data packets are carried in msg3. RACH-based SDT also requires packet size determination. Only when the packet size is less than a certain threshold can small data packets be transmitted during the random access process. Otherwise, small data packets must be transmitted after entering the connected state through the RACH process. In addition to the packet size limit, the terminal must compare the current SS-RSRP with the RSRP threshold before transmitting a small data packet. Small data packets are only transmitted when the current SS-RSRP is greater than the RSRP threshold. The purpose of comparing the RSRP threshold here is to ensure that SDT transmission can be performed only under good coverage conditions, so as to avoid wasting uplink transmission resources.

[0078] For SDT with Configuration Grant (CG), related technologies propose that a user-specific search space (USS) can be configured for it, which is used for retransmission scheduling of small data packets and subsequent downlink data scheduling. Furthermore, for subsequent transmission by the terminal, it is proposed to configure a Cell-Radio Network Temporary Identifier (C-RNTI) for each terminal in the inactive state. The C-RNTI configured for each terminal in the inactive state can be the same as the C-RNTI in the RRC_CONNECTED state of the terminal, or it can be configured by the network side through explicit signaling.

[0079] On the other hand, in the related art, the 4-step RACH contention-based random access method can be referred to Figure 2 . Figure 2 FIG. 1 is a flow chart showing a random access method according to an exemplary embodiment. Figure 2As shown, in the first step, the terminal needs to send a random access request to the network device through the physical random access channel (PRACH) resource. In the second step, the network device allocates a temporary cell-radio network temporary identifier (TC-RNTI) and the uplink (UL) resources required to transmit message 3 (msg.3) to the terminal through a random access response message (RAR). The terminal blindly detects the physical downlink control channel (PDCCH) of the RAR using the random access radio network temporary identifier (RA-RNTI). In the third step, the terminal sends msg.3 to the network device. Among them, msg.3 includes high-layer signaling such as RRC resume request. At the same time, it carries its own identifier i-RNTI or short i-RNTI to start random access contention resolution. In the fourth step, the terminal blindly detects the downlink control information (DCI) of msg.4 using the TC-RNTI obtained in the second step. If the decoding is successful and the content of the UE contention resolution identifier media access layer control element (MAC Control Element, MAC CE) contained in msg.4 is consistent with some bits of msg.3RRC Resume Request (generally the first 48 bits), the contention resolution is successful, and the terminal changes the TC-RNTI to C-RNTI and uses it for data transmission in the connected state.

[0080] According to the above embodiments, in related technologies, contention-based random access methods, such as 4-step RACH, have complex steps, a large random access delay, and are not conducive to terminal energy saving.

[0081] To reduce the number of random access steps and save terminal energy consumption, this application proposes a random access method that uses semi-static transmission resources configured for the terminal SDT to initiate random access. By initiating random access on the semi-static transmission resources configured for the terminal SDT, uplink message msg.3 can be directly sent, thereby shortening the random access process and achieving the effect of saving terminal energy consumption.

[0082] Figure 3 FIG. 1 is a flow chart showing a random access method according to an exemplary embodiment. Figure 3As shown, the random access method is used in a terminal and includes the following steps.

[0083] In step S11 , semi-static transmission resources are determined.

[0084] In step S12, an uplink message for random access is sent based on the semi-static transmission resources.

[0085] In the embodiment of the present disclosure, the semi-static transmission resource is a semi-static transmission resource used for inactive small data packet transmission SDT.

[0086] In an embodiment of the present disclosure, the terminal determines a semi-static transmission resource for transmitting SDT, a small data packet in an inactive state; when the terminal needs to enter the RRC connection state, it sends an uplink message for random access based on the semi-static transmission resource for data transmission. When the terminal needs to enter the RRC connection state, it needs to request access to the network from the network device to establish a network connection; at this time, the terminal can use the semi-static transmission resource for transmitting SDT, a small data packet in an inactive state, to send msg.3 for random access to achieve random access. In other words, in the present disclosure, if the terminal is configured with a semi-static transmission resource for transmitting SDT, a msg.3 for random access can be initiated based on the semi-static transmission resource. Among them, the semi-static transmission resource for transmitting SDT, a small data packet in an inactive state, can be determined by the terminal based on the configuration of the network-side device, or based on pre-stored configuration information, or based on the communication protocol.

[0087] Through the random access method proposed in the present disclosure, msg.3 for random access can be sent based on semi-static transmission resources to achieve random access, shortening the random access process and achieving the effect of saving terminal energy consumption.

[0088] In the embodiment of the present disclosure, the uplink message includes an RRC connection recovery request and / or an RRC connection establishment request. The terminal may be a terminal configured to authorize the transmission of small data packets in an inactive state.

[0089] In some embodiments of the present disclosure, when a terminal needs to perform random access, it is necessary to determine a timing advance value for random access uplink data transmission. When it is determined that the timing advance value is valid, an RRC connection recovery request and / or an RRC connection establishment request is sent to a network device (e.g., a base station) through a semi-static transmission resource configured for small data packet transmission of the terminal to initiate random access.

[0090] Among them, the semi-static transmission resources configured for the terminal small data packet transmission in the embodiment of the present disclosure are semi-static transmission resources for the terminal RRC inactive state small data packet transmission.

[0091] In some embodiments of the present disclosure, the uplink message does not include the first identification information of the terminal. The first identification information of the terminal is the identification information of the terminal in the RRC inactive state. For example, the first identification information is i-RNTI.

[0092] It should be noted that a mapping relationship exists between the terminal's identification information and the location of the semi-static transmission resource configured by the network device for small data packet transmission. Specifically, when the terminal sends an uplink message for random access based on the semi-static transmission resource, the terminal can implicitly indicate the first identification information of the network device terminal based on the mapping relationship between the semi-static transmission resource location and the terminal's identification information. Specifically, the i-RNTI of the network device terminal is implicitly indicated based on the location of the semi-static transmission resource. The i-RNTI is used by the terminal for random access.

[0093] In the embodiment of the present disclosure, after the terminal sends an RRC connection recovery request and / or an RRC connection establishment request, it will receive the DCI issued by the network device through the Common Search Space (CSS) or USS to determine that the random access is completed. The execution steps can be referred to Figure 4 .

[0094] Figure 4 FIG. 1 is a flow chart showing a random access method according to an exemplary embodiment. Figure 4 As shown, the random access method is used in a terminal and includes the following steps.

[0095] In step S21 , DCI is received.

[0096] In step S22, in response to the DCI-scheduled downlink data transmission containing RRC connection recovery information or RRC connection establishment information, a reception confirmation message is sent.

[0097] In an embodiment of the present disclosure, the terminal schedules MSG.4 for random access based on the DCI received in the CSS / USS and determines the RRC information contained in MSG.4. In one implementation, if MSG.4 contains RRC connection recovery information or RRC connection establishment information, a reception confirmation message (ACK) is fed back to the base station, completing the random access procedure. In another implementation, if MSG.4 does not contain RRC connection recovery information or RRC connection establishment information, no ACK is sent (or a NACK is sent), and the random access procedure is not completed.

[0098] In the embodiment of the present disclosure, the DCI is: DCI sent by the base station after receiving the uplink message of random access sent by the terminal; wherein the uplink message is sent by the terminal using the semi-static transmission resource of the inactive small data packet transmission SDT.

[0099] In the disclosed embodiments, the RRC connection recovery message or RRC connection establishment message may not include contention resolution information. As described above, the semi-static transmission resource location for small data packet transmission configured by the terminal based on the network device is mapped to the terminal's identification information. If the terminal initiates random access based on the physical resources that correspond to the terminal itself, contention resolution is not required.

[0100] In an embodiment of the present disclosure, if the terminal is in an inactive state and has not obtained the terminal's second identification information, the terminal's second identification information can be obtained based on the received indication information or communication protocol. The terminal's second identification information is used for data scheduling and data transmission. The terminal's second identification information can be a C-RNTI.

[0101] In some embodiments of the present disclosure, a terminal obtains the second terminal identification information based on received indication information or a communication protocol. One approach is that the second terminal identification information is carried in the DCI dynamic signaling received by the terminal. Alternatively, one approach is that the second terminal identification information is carried in the MAC CE received by the terminal. Another approach is that the second terminal identification information is carried in the RRC signaling received by the terminal. Yet another approach is that, according to the communication protocol, the same second terminal identification information (i.e., C-RNTI) as before the RRC connection is released is used.

[0102] Based on the same / similar concept, an embodiment of the present disclosure further provides a random access method.

[0103] Figure 5 FIG. 1 is a flow chart showing a random access method according to an exemplary embodiment. Figure 5 As shown, the random access method is used in a network device and includes the following steps.

[0104] In step S31, an uplink message for random access sent by a terminal based on semi-static transmission resources is received.

[0105] In the embodiment of the present disclosure, the semi-static transmission resource is a semi-static transmission resource used for inactive small data packet transmission SDT.

[0106] In an embodiment of the present disclosure, the terminal determines a semi-static transmission resource for data transmission, and when the terminal needs to enter the RRC connection state, it sends an uplink message for random access based on the semi-static transmission resource for data transmission. Request access to the network from the network device to establish a network connection. In other words, in the present disclosure, if the terminal is configured with a semi-static transmission resource for data transmission, msg.3 for random access can be initiated based on the semi-static transmission resource. Among them, the semi-static transmission resource for inactive small data packet transmission SDT can be determined by the terminal based on the configuration of the network-side device, or based on pre-stored configuration information, or based on the communication protocol.

[0107] That is, the method includes an optional step:

[0108] In step S32, a configuration message is sent, where the configuration message is used to instruct the terminal to use semi-static transmission resources for small data packet transmission (SDT) in an inactive state.

[0109] The step S32 may not be executed, or may be executed before or after the step S31.

[0110] In an embodiment of the present disclosure, when the terminal needs to enter the RRC connection state, an uplink message for random access is sent based on the semi-static transmission resources used for data transmission. When the terminal needs to enter the RRC connection state, it needs to request access to the network from the network device to establish a network connection; at this time, the terminal can use the semi-static transmission resources used for transmitting small data packets SDT in the non-activated state to send msg.3 for random access to achieve random access. In other words, in the present disclosure, if the terminal is configured with semi-static transmission resources for transmitting small data packets SDT in the non-activated state, msg.3 for random access can be initiated based on the semi-static transmission resources. Among them, the semi-static transmission resources for transmitting small data packets SDT in the non-activated state can be determined by the terminal based on the configuration of the network-side device, or based on pre-stored configuration information, or based on the communication protocol.

[0111] Through the random access method proposed in the present disclosure, msg.3 for random access can be received based on semi-static transmission resources to achieve random access, shortening the terminal random access process and achieving the effect of saving terminal energy consumption.

[0112] In the embodiment of the present disclosure, the uplink message includes an RRC connection recovery request and / or an RRC connection establishment request. The terminal may be a terminal configured to authorize the transmission of small data packets in an inactive state.

[0113] In the embodiment of the present disclosure, the semi-static transmission resources configured for the transmission of small data packets of the terminal are semi-static transmission resources for the transmission of small data packets in the RRC inactive state of the terminal.

[0114] In some embodiments of the present disclosure, the first identification information of the terminal is not included in the uplink message. The first identification information of the terminal is the identification information of the terminal in the RRC inactive state. For example, the first identification information is i-RNTI.

[0115] It should be noted that the semi-static transmission resource position configured by the network device for the terminal for small data packet transmission has a mapping relationship with the identification information of the terminal. That is, the terminal sends the uplink message for random access based on the semi-static transmission resource, and the mapping relationship between the semi-static transmission resource position and the identification information of the terminal is used to implicitly confirm the first identification information of the terminal, that is, the i-RNTI of the terminal is implicitly determined based on the position of the semi-static transmission resource. The i-RNTI is used by the terminal to perform random access.

[0116] In an embodiment of the present disclosure, after the network device receives the uplink message containing the RRC connection resume request and / or the RRC connection establishment request, the network device will issue DCI through CSS or USS to determine that the terminal random access is completed. The execution steps can refer to Figure 6 .

[0117] Figure 6 is a flowchart of a random access method according to an exemplary embodiment. As Figure 6 shown, the random access method is used in a network device, which includes the following steps.

[0118] In step S41, in response to receiving the uplink message, DCI is sent.

[0119] The uplink message can be an uplink message for random access sent by the terminal using the semi-static transmission resource of the inactive state small data packet transmission SDT.

[0120] The DCI scheduling downlink data transmission contains RRC connection resume information or RRC connection establishment information indicating the terminal.

[0121] In an embodiment of the present disclosure, the network device sends DCI based on CSS / USS for msg.4 scheduling of terminal random access. If an ACK sent by the terminal is received, it is confirmed that the terminal random access process is completed. If no ACK sent by the terminal is received, it is confirmed that the terminal random access process is not completed.

[0122] In an embodiment of the present disclosure, the RRC connection recovery message or the RRC connection establishment message may not include contention resolution information. As described above, the semi-static transmission resource location used for small data packet transmission has a mapping relationship with the terminal's identification information. The network device may determine the terminal initiating the random access request based on the mapping relationship between the semi-static transmission resource location used for small data packet transmission and the terminal's identification information, thereby uniquely allocating second identification information to the terminal.

[0123] In an embodiment of the present disclosure, if the network device determines that the terminal is in an inactive state and has not obtained the terminal's second identification information, it may send an indication message, wherein the indication message includes the terminal's second identification information, which is used for data scheduling and data transmission. The terminal's second identification information may be a C-RNTI.

[0124] The network device sends an indication message to configure the second identification information for the terminal. One way is to send DCI to the terminal, and use the DCI to dynamically schedule the second identification information of the terminal carried in the signaling. Alternatively, another way is to send a MAC CE to the terminal that carries the second identification information of the terminal.

[0125] In the embodiments of the present disclosure, the technical solution can be briefly described as follows:

[0126] For CG-SDT, since the terminal is configured with semi-static uplink transmission resources, in this case, if the terminal wants to enter the RRC_CONNECTED state, it can directly send msg.3 through the semi-static uplink transmission resources configured by the base station to shorten the random access process. Specifically, there are the following designs:

[0127] (1) When a terminal wants to perform random access, it first needs to determine whether the TA is valid. If the TA is valid, it sends an RRCResumeRequest to the base station using the semi-static resources configured for the SDT to initiate random access.

[0128] (2) After receiving msg.3 from the terminal using the semi-statically configured uplink resources, the base station sends DCI via the CSS / USS to schedule msg.4. msg.4 includes RRC resume; accordingly, after receiving RRC resume, the terminal sends back an ACK, completing the random access process.

[0129] Of course, the above steps (1) and (2) are executed by the terminal and the base station respectively; in the above embodiment, the two steps are written together for exemplary purposes only.

[0130] Specifically, for the terminal, the method it executes is:

[0131] In response to the terminal performing random access and the TA of the terminal being valid, the terminal sends an RRCResumeRequest to the base station through the semi-static resources configured for the SDT to initiate random access; and the terminal receives the DCI sent by the base station through the CSS / USS and performs msg.4 scheduling; wherein the msg.4 includes RRC resume; the terminal performs HARQ feedback according to RRCresume (if received, ACK is fed back); and the random access is completed.

[0132] Specifically, for the base station, the method it performs is:

[0133] In response to receiving msg.3 sent by the terminal based on the uplink resources configured semi-statically when performing random access, the base station sends DCI through the CSS / USS and schedules msg.4; wherein the msg.4 includes RRC resume;

[0134] The receiving terminal performs HARQ feedback according to the RRC resume (if received, it feeds back ACK).

[0135] Optionally, since there is a mapping relationship between the semi-static uplink resources and the terminal ID, the RRCResumeRequest message may not need to include information such as i-RNTI; similarly, msg.4 may not need to include information such as Contention ResolutionIdentity MAC CE.

[0136] In addition, if the terminal has not yet obtained the C-RNTI in the inactive state, the base station will allocate a C-RNTI to the terminal through msg.4. Specifically, the C-RNTI can be carried by DCI, RRC Esume or MAC CE.

[0137] In a possible implementation, the transmitted signaling may be:

[0138]

[0139] Based on the same concept, an embodiment of the present disclosure also provides a random access device.

[0140] It is understandable that the random access device provided by the embodiment of the present disclosure includes hardware structures and / or software modules corresponding to the execution of each function in order to realize the above functions. In combination with the units and algorithm steps of each example disclosed in the embodiment of the present disclosure, the embodiment of the present disclosure can be implemented in the form of hardware or a combination of hardware and computer software. Whether a function is executed in the form of hardware or computer software driving hardware depends on the specific application and design constraints of the technical solution. Those skilled in the art may use different methods to realize the described functions for each specific application, but such implementation should not be considered to exceed the scope of the technical solution of the embodiment of the present disclosure.

[0141] Figure 7 FIG. 1 is a block diagram of a random access device according to an exemplary embodiment. Figure 7 The random access device 100 is applied to a terminal and includes a processing module 101 and a sending module 102.

[0142] The processing module 101 is configured to determine a semi-static transmission resource. The sending module 102 is configured to send an uplink message for random access based on the semi-static transmission resource.

[0143] In the embodiment of the present disclosure, the uplink message includes a radio resource control RRC connection recovery request and / or an RRC connection establishment request.

[0144] In the embodiment of the present disclosure, before sending an uplink message for random access based on the semi-static transmission resource, the method further includes:

[0145] Determine whether the timing advance value for random access uplink data transmission is valid.

[0146] In the embodiment of the present disclosure, the semi-static transmission resource is a semi-static transmission resource used for transmitting small data packets in an inactive state.

[0147] In the embodiment of the present disclosure, the uplink message does not include the first identification information of the terminal, and the first identification information of the terminal is the identification information of the terminal in the RRC inactive state.

[0148] In the embodiment of the present disclosure, the first identification information of the terminal is determined based on the location of the semi-static transmission resource carrying the uplink message.

[0149] In the embodiment of the present disclosure, the apparatus further includes: a receiving module 103 .

[0150] The receiving module 103 is configured to receive downlink control information DCI and send a reception confirmation message in response to downlink data transmission scheduled by the DCI including RRC connection recovery information or RRC connection establishment information.

[0151] In the embodiment of the present disclosure, the RRC connection recovery message or the RRC connection establishment message does not include contention resolution information.

[0152] In the embodiment of the present disclosure, the processing module 101 is further configured to obtain second identification information of the terminal based on the received indication information or communication protocol, and the second identification information of the terminal is used for data scheduling and data transmission.

[0153] Figure 8 FIG. 1 is a block diagram of a random access device according to an exemplary embodiment. Figure 8 The random access device 200 is applied to a network device and includes a receiving module 201.

[0154] The receiving module 201 is configured to receive an uplink message for random access sent by a terminal based on semi-static transmission resources.

[0155] In the embodiment of the present disclosure, the uplink message includes an RRC connection recovery request and / or an RRC connection establishment request.

[0156] In the embodiment of the present disclosure, the random access apparatus further includes a processing module 202;

[0157] The processing module 202 is configured to determine a semi-static transmission resource for transmitting small data packets in an inactive state.

[0158] In the embodiment of the present disclosure, the uplink message does not include the first identification information of the terminal, and the first identification information of the terminal is the identification information of the terminal in the RRC inactive state.

[0159] In the embodiment of the present disclosure, the first identification information of the terminal is determined based on the location of the semi-static resource carrying the uplink message.

[0160] In the embodiment of the present disclosure, the apparatus further includes: a sending module 203 .

[0161] The sending module 203 is configured to send DCI in response to receiving an uplink message, where the downlink data transmission scheduled by the DCI includes RRC connection recovery information or RRC connection establishment information indicating the terminal.

[0162] In the embodiment of the present disclosure, the RRC connection recovery message or the RRC connection establishment message does not include contention resolution information.

[0163] In the embodiment of the present disclosure, the sending module 203 is further configured to send an indication message, where the indication message includes the second identification information of the terminal, and the second identification information of the terminal is used for data scheduling and data transmission.

[0164] Regarding the apparatus in the above embodiment, the specific manner in which each module performs operations has been described in detail in the embodiment of the method, and will not be elaborated here.

[0165] Figure 9 FIG3 is a block diagram of an apparatus 300 for random access according to an exemplary embodiment. For example, the apparatus 300 may be a mobile phone, a computer, a digital broadcast terminal, a messaging device, a game console, a tablet device, a medical device, a fitness device, a personal digital assistant, etc.

[0166] Reference Figure 9 , apparatus 300 may include one or more of the following components: a processing component 302 , a memory 304 , a power component 306 , a multimedia component 308 , an audio component 310 , an input / output (I / O) interface 312 , a sensor component 314 , and a communication component 316 .

[0167] The processing component 302 generally controls the overall operation of the device 300, such as operations associated with display, phone calls, data communications, camera operation, and recording operations. The processing component 302 may include one or more processors 320 to execute instructions to perform all or part of the steps of the above-described method. In addition, the processing component 302 may include one or more modules to facilitate interaction between the processing component 302 and other components. For example, the processing component 302 may include a multimedia module to facilitate interaction between the multimedia component 308 and the processing component 302.

[0168] The memory 304 is configured to store various types of data to support operations on the device 300. Examples of such data include instructions for any application or method operating on the device 300, contact data, phone book data, messages, pictures, videos, etc. The memory 304 can be implemented by any type of volatile or non-volatile storage device, or a combination thereof, such as static random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic memory, flash memory, magnetic disk, or optical disk.

[0169] The power component 306 provides power to the various components of the device 300. The power component 306 may include a power management system, one or more power supplies, and other components associated with generating, managing, and distributing power to the device 300.

[0170] The multimedia component 308 includes a screen that provides an output interface between the device 300 and the user. In some embodiments, the screen may include a liquid crystal display (LCD) and a touch panel (TP). If the screen includes a touch panel, the screen can be implemented as a touch screen to receive input signals from the user. The touch panel includes one or more touch sensors to sense touches, slides, and gestures on the touch panel. The touch sensor can not only sense the boundaries of the touch or slide action, but also detect the duration and pressure associated with the touch or slide operation. In some embodiments, the multimedia component 308 includes a front camera and / or a rear camera. When the device 300 is in an operating mode, such as a shooting mode or a video mode, the front camera and / or the rear camera can receive external multimedia data. Each front camera and rear camera can be a fixed optical lens system or have a focal length and optical zoom capability.

[0171] The audio component 310 is configured to output and / or input audio signals. For example, the audio component 310 includes a microphone (MIC) that is configured to receive external audio signals when the device 300 is in an operating mode, such as a call mode, a recording mode, and a voice recognition mode. The received audio signals may be further stored in the memory 304 or transmitted via the communication component 316. In some embodiments, the audio component 310 further includes a speaker for outputting audio signals.

[0172] I / O interface 312 provides an interface between processing component 302 and peripheral interface modules, such as a keyboard, click wheel, buttons, etc. These buttons may include but are not limited to: a home button, volume buttons, a start button, and a lock button.

[0173] The sensor assembly 314 includes one or more sensors for providing various aspects of the status assessment of the device 300. For example, the sensor assembly 314 can detect the open / closed state of the device 300, the relative positioning of components, such as the display and keypad of the device 300. The sensor assembly 314 can also detect changes in the position of the device 300 or a component of the device 300, the presence or absence of user contact with the device 300, the orientation or acceleration / deceleration of the device 300, and temperature changes of the device 300. The sensor assembly 314 may include a proximity sensor configured to detect the presence of nearby objects without any physical contact. The sensor assembly 314 may also include an optical sensor, such as a CMOS or CCD image sensor, for use in imaging applications. In some embodiments, the sensor assembly 314 may also include an accelerometer, a gyroscope, a magnetic sensor, a pressure sensor, or a temperature sensor.

[0174] The communication component 316 is configured to facilitate wired or wireless communication between the device 300 and other devices. The device 300 can access a wireless network based on a communication standard, such as WiFi, 2G or 3G, or a combination thereof. In an exemplary embodiment, the communication component 316 receives a broadcast signal or broadcast-related information from an external broadcast management system via a broadcast channel. In an exemplary embodiment, the communication component 316 also includes a near field communication (NFC) module to facilitate short-range communication. For example, the NFC module can be implemented based on radio frequency identification (RFID) technology, infrared data association (IrDA) technology, ultra-wideband (UWB) technology, Bluetooth (BT) technology and other technologies.

[0175] In an exemplary embodiment, the apparatus 300 may be implemented by one or more application-specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices (PLDs), field programmable gate arrays (FPGAs), controllers, microcontrollers, microprocessors, or other electronic components to perform the above-described method.

[0176] In an exemplary embodiment, a non-transitory computer-readable storage medium including instructions is also provided, such as a memory 304 including instructions, which can be executed by the processor 320 of the apparatus 300 to perform the above method. For example, the non-transitory computer-readable storage medium can be a ROM, a random access memory (RAM), a CD-ROM, a magnetic tape, a floppy disk, an optical data storage device, etc.

[0177] Figure 10 FIG. 4 is a block diagram of a device 400 for random access according to an exemplary embodiment. For example, the device 400 may be provided as a server. Figure 10 The apparatus 400 includes a processing component 422, which further includes one or more processors, and a memory resource represented by a memory 432 for storing instructions, such as an application, that can be executed by the processing component 422. The application stored in the memory 432 may include one or more modules, each corresponding to a set of instructions. In addition, the processing component 422 is configured to execute the instructions to perform the above-described method.

[0178] The device 400 may also include a power supply component 426 configured to perform power management of the device 400, a wired or wireless network interface 450 configured to connect the device 400 to a network, and an input / output (I / O) interface 458. The device 400 may operate based on an operating system stored in the memory 432, such as Windows Server™, Mac OS X™, Unix™, Linux™, FreeBSD™, or the like.

[0179] It is further understood that in the present disclosure, "plurality" refers to two or more than two, and other quantifiers are similar. "And / or" describes the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone. The character " / " generally indicates that the related objects before and after are in an "or" relationship. The singular forms "a", "the" and "the" are also intended to include the plural forms, unless the context clearly indicates otherwise.

[0180] It will be further understood that the terms "first," "second," and the like are used to describe various types of information, but such information should not be limited to these terms. These terms are used solely to distinguish information of the same type from one another and do not indicate a particular order or level of importance. In fact, the terms "first," "second," and the like are fully interchangeable. For example, first information could be referred to as second information, and similarly, second information could be referred to as first information without departing from the scope of this disclosure.

[0181] It is further understood that although operations are described in a particular order in the drawings in the embodiments of the present disclosure, this should not be construed as requiring that the operations be performed in the particular order shown or in a serial order, or that all of the operations shown be performed to obtain the desired results. In certain circumstances, multitasking and parallel processing may be advantageous.

[0182] Those skilled in the art will readily appreciate other embodiments of the present disclosure after considering the specification and practicing the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the present disclosure that follow the general principles of the present disclosure and include common knowledge or customary techniques in the art not disclosed herein. The description and examples are to be considered merely as exemplary, and the true scope and spirit of the present disclosure are indicated by the following claims.

[0183] It should be understood that the present disclosure is not limited to the exact structures described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the scope of the appended claims.

Claims

1. A random access method, characterized in that: Applied to a terminal, the method includes: Determining a semi-static transmission resource, where the semi-static transmission resource is a semi-static transmission resource used for transmitting inactive small data packets; Sending an uplink message for random access based on the semi-static transmission resource, wherein the uplink message includes a radio resource control (RRC) connection recovery request; Receive downlink control information DCI; In response to the DCI-scheduled downlink data transmission including RRC connection recovery information, a reception confirmation message is sent.

2. The random access method according to claim 1, wherein: Before sending an uplink message for random access based on the semi-static transmission resource, the method further includes: Determine whether the timing advance value for random access uplink data transmission is valid.

3. The random access method according to claim 1, wherein: The uplink message does not include the first identification information of the terminal, and the first identification information of the terminal is the identification information of the terminal in the RRC inactive state.

4. The random access method according to claim 3, wherein: The first identification information of the terminal is determined based on a location of a semi-static transmission resource that carries the uplink message.

5. The random access method according to claim 1, wherein: The RRC connection recovery message or the RRC connection establishment message does not include contention resolution information.

6. The random access method according to claim 1, wherein: The method further comprises: Based on the received indication information or communication protocol, second identification information of the terminal is acquired, where the second identification information of the terminal is used for data scheduling and data transmission.

7. A random access method, characterized in that: Applied to a network device, the method includes: receiving an uplink message for random access sent by a terminal based on a semi-static transmission resource, where the semi-static transmission resource is a semi-static transmission resource for transmitting an inactive small data packet, and the uplink message includes a radio resource control (RRC) connection recovery request; Sending DCI, where downlink data transmission scheduled by the DCI includes RRC connection recovery information; Receive a receipt confirmation message.

8. The random access method according to claim 7, wherein: The uplink message does not include the first identification information of the terminal, and the first identification information of the terminal is the identification information of the terminal in the RRC inactive state.

9. The random access method according to claim 8, wherein: The first identification information of the terminal is determined based on a semi-static resource location that carries the uplink message.

10. The random access method according to claim 7, wherein: The RRC connection recovery message or the RRC connection establishment message does not include contention resolution information.

11. The random access method according to claim 8, wherein: The method further comprises: An indication message is sent, where the indication message includes second identification information of the terminal, and the second identification information of the terminal is used for data scheduling and data transmission.

12. A random access device, characterized in that: Applied to a terminal, the device includes: A processing module, configured to determine a semi-static transmission resource, wherein the semi-static transmission resource is a semi-static transmission resource used for transmitting an inactive small data packet; A sending module, configured to send an uplink message for random access based on the semi-static transmission resource, wherein the uplink message includes a radio resource control RRC connection recovery request; A receiving module, configured to receive downlink control information DCI; in response to downlink data transmission scheduled by the DCI including RRC connection recovery information; The sending module is further configured to send a reception confirmation message.

13. A random access device, characterized in that: Applied to network equipment, the device includes: A receiving module, configured to receive an uplink message for random access sent by a terminal based on a semi-static transmission resource, wherein the semi-static transmission resource is a semi-static transmission resource for transmitting an inactive small data packet, and the uplink message includes a radio resource control RRC connection recovery request; A sending module, configured to send DCI, wherein the downlink data transmission scheduled by the DCI includes RRC connection recovery information; The receiving module is further configured to receive a reception confirmation message.

14. A random access device, characterized in that: include: processor; a memory for storing processor-executable instructions; The processor is configured to: execute the random access method described in any one of claims 1-6, or execute the random access method described in any one of claims 7-11.

15. A storage medium, characterized in that: The storage medium stores instructions. When the instructions in the storage medium are executed by the processor of the mobile terminal, the mobile terminal is enabled to execute the random access method described in any one of claims 1 to 6, or the mobile terminal is enabled to execute the random access method described in any one of claims 7 to 11.

Images