A random access method and apparatus

Abstract

The application provides a random access method and device, and relates to the technical field of communication. The method comprises the following steps: a network side device receives a random access request sent by a user equipment (UE); and the network side device sends a random access response (RAR) according to the random access request, wherein the RAR corresponds to a first area range, the first area range is determined according to a beam service area, and the beam service area is a service area corresponding to a beam sent by the network side device. In this way, the problem of waste of time-frequency resources caused by the fact that the network side device needs multiple RARs to complete the sending of random access response information of multiple UEs with common characteristics is solved.

Description

Technical Field

[0001] This application relates to the field of communication technology, and in particular to a random access method and apparatus. Background Technology

[0002] In satellite communications, beam coverage can be achieved in various ways, such as wide-beam continuous coverage and narrow-beam discontinuous coverage (beam skipping). At any given time, a beam, according to its configured frequency and beam pattern, corresponds to a specific service area. During random access, after the base station receives the preamble sequence from the User Equipment (UE) within the beam's service area, it needs to send a Random Access Response (RAR) to facilitate the UE's reception of relevant access information and completion of the random access process.

[0003] In New Radio (NR), each UE typically corresponds to a different Random Access ID (Random Access Preamble), which in turn corresponds to a different RAR (Register Authentication and Access Response). This means the RAR is UE-specific. When multiple UEs share certain characteristics, the base station still needs multiple RARs to transmit random access response information to each UE, resulting in a waste of time and frequency resources. Summary of the Invention

[0004] The purpose of this application is to provide a random access method and apparatus to solve the problem of wasted time and frequency resources caused by the need for multiple RARs to complete the transmission of random access response information for multiple UEs with common characteristics in the prior art.

[0005] To achieve the above objectives, embodiments of this application provide a random access method, including:

[0006] The network-side equipment receives a random access request sent by the user equipment (UE);

[0007] The network-side device sends a Random Access Response (RAR) based on the random access request. The RAR corresponds to a first area range, which is determined based on the beam service area, which is the service area corresponding to the beam sent by the network-side device.

[0008] Optionally, the first region is the beam service area or a portion of the beam service area.

[0009] Optionally, the target feature parameters corresponding to the same partial area in the beam service area are the same.

[0010] Optionally, the target feature parameters include one or more of the following:

[0011] The first specific angular range relative to the satellite's elevation angle;

[0012] The first specific range of distances relative to the satellite;

[0013] The second specific angular range relative to the first specific reference point of the beam service area;

[0014] The second specific distance range relative to the second specific reference point in the beam service area;

[0015] The satellite is associated with the network-side equipment.

[0016] Optionally, before the network-side device receives the random access request sent by the user equipment (UE), it further includes:

[0017] The network-side device sends a broadcast message, which indicates the random access resources of the UE within the first area.

[0018] Optionally, the load indication field of the RAR includes at least one of the following:

[0019] Beam frequency point, which corresponds to the center frequency point of the beam or a specific frequency point of the beam;

[0020] Beam pattern;

[0021] Location index; different location indices correspond to different first region ranges.

[0022] Optionally, the beam pattern includes one or more of the following:

[0023] Beam period;

[0024] Service hours.

[0025] Optionally, the service time includes one or more of the following:

[0026] Start time;

[0027] Duration;

[0028] End time.

[0029] Optionally, the service time is any one of the following:

[0030] A continuous period of time;

[0031] Discrete time periods.

[0032] Optionally, a random access response (RAR) is sent, including:

[0033] If the first area range is the beam service area or a part of the beam service area, the network-side device sends a RAR corresponding to the first area range;

[0034] Alternatively, if the first area is the beam service area, the network-side device sends multiple RARs, each RAR corresponding to a different portion of the beam service area.

[0035] Optionally, the network-side device sends a Random Access Response (RAR) based on the random access request, including:

[0036] The network-side device determines the first random access radio network temporary identifier RA-RNTI based on the random access request and the first index, wherein the first index is the index of the beam in which the physical random access channel PRACH timing occurs or the location index of the beam in which the PRACH timing occurs.

[0037] The network-side device uses the first RA-RNTI to scramble the physical downlink control channel (PDCCH) corresponding to the physical downlink shared channel (PDSCH) carrying the RAR;

[0038] The network-side device sends the PDCCH and the PDSCH carrying the RAR.

[0039] Optionally, the network-side device determines the first random access radio network temporary identifier (RA-RNTI) based on the random access request and the first index, including:

[0040] When the first region is within the beam service area, the first RA-RNTI is determined based on the index of the beam where the PRACH timing occurs;

[0041] Alternatively, if the first region is a portion of the beam service area, the first RA-RNTI is determined based on the location index of the beam where the PRACH timing occurs.

[0042] Optionally, when the first region is the beam service area, determining the first RA-RNTI based on the index of the beam where the PRACH timing occurs includes:

[0043] According to the formula:

[0044] RA-RNTI=1+s_id+14×t_id+14×80×f_id+14×80×8×ul_carrier_id+14×80×8×2×bm_id,

[0045] Determine the first RA-RNTI;

[0046] Wherein, RA-RNTI represents the temporary identifier of the first random access radio network, s_id represents the index of the first orthogonal frequency division multiplexing (OFDM) symbol in which the PRACH timing occurs, t_id represents the index of the first time slot of the system frame in which the PRACH timing occurs, f_id represents the index of the PRACH timing in the frequency domain, ul_carrier_id indicates the uplink carrier used for random access preamble transmission, and bm_id represents the index of the beam in which the PRACH timing occurs.

[0047] Optionally, if the first region is a portion of the beam service area, determining the first RA-RNTI based on the location index of the beam where the PRACH timing occurs includes:

[0048] According to the formula:

[0049] RA-RNTI=1+s_id+14×t_id+14×80×f_id+14×80×8×ul_carrier_id+14×80×8×2×bl_id,

[0050] Calculate the first RA-RNTI;

[0051] Wherein, RA-RNTI represents the temporary identifier of the first random access radio network, s_id represents the index of the first orthogonal frequency division multiplexing (OFDM) symbol where the PRACH timing occurs, t_id represents the index of the first time slot of the system frame where the PRACH timing occurs, f_id represents the index of the PRACH timing in the frequency domain, ul_carrier_id indicates the uplink carrier used for random access preamble transmission, and bl_id represents the position index value of the beam where the PRACH timing occurs.

[0052] This application also provides a random access method, including:

[0053] The UE sends a random access request to the network-side equipment;

[0054] The UE receives a Random Access Response (RAR) sent by the network-side device. The RAR corresponds to a first area range, which is determined based on the beam service area. The beam service area is the service area corresponding to the beam sent by the network-side device.

[0055] Optionally, the first region is the beam service area or a portion of the beam service area.

[0056] Optionally, the target feature parameters corresponding to the same partial area in the beam service area are the same.

[0057] Optionally, the target feature parameters include one or more of the following:

[0058] The first specific angular range relative to the satellite's elevation angle;

[0059] The first specific range of distances relative to the satellite;

[0060] The second specific angular range relative to the first specific reference point of the beam service area;

[0061] The second specific distance range relative to the second specific reference point in the beam service area;

[0062] The satellite is associated with the network-side equipment.

[0063] Optionally, before the UE sends a random access request to the network-side device, it also includes:

[0064] The UE receives a broadcast message sent by the network-side device, the broadcast message indicating the random access resources of the UE within the first area.

[0065] Optionally, the load indication field of the RAR includes at least one of the following:

[0066] Beam frequency point, which corresponds to the center frequency point of the beam or a specific frequency point of the beam;

[0067] Beam pattern;

[0068] Location index; different location indices correspond to different first region ranges.

[0069] Optionally, the beam pattern includes one or more of the following:

[0070] Beam period;

[0071] Service hours.

[0072] Optionally, the service time includes one or more of the following:

[0073] Start time;

[0074] Duration;

[0075] End time.

[0076] Optionally, the service time is any one of the following:

[0077] A continuous period of time;

[0078] Discrete time periods.

[0079] Optionally, the UE receives a Random Access Response (RAR) sent by the network-side device, including:

[0080] When the first area range is the beam service area or a part of the beam service area, the UE receives a RAR corresponding to the first area range sent by the network-side device;

[0081] Alternatively, if the first region is the beam service area, the UE receives multiple RARs sent by the network-side device, each RAR corresponding to a different part of the beam service area.

[0082] Optionally, the method further includes:

[0083] The UE determines the first RA-RNTI based on the random access resources and the first index, where the first index is the index of the beam where the PRACH timing occurs or the position index of the beam where the PRACH timing occurs.

[0084] The UE uses the first RA-RNTI to descramble the PDCCH corresponding to the PDSCH carrying the RAR.

[0085] Optionally, the UE determines the first RA-RNTI based on the random access resource and the first index, including:

[0086] When the first region is the beam service area, the first RA-RNTI is determined according to the index of the beam where the PRACH timing is located or the location index of the beam where the PRACH timing is located.

[0087] Alternatively, if the first region is a portion of the beam service area, the first RA-RNTI is determined based on the location index of the beam where the PRACH timing occurs.

[0088] Optionally, when the first region is the beam service area, determining the first RA-RNTI based on the index of the beam where the PRACH timing occurs includes:

[0089] According to the formula:

[0090] RA-RNTI=1+s_id+14×t_id+14×80×f_id+14×80×8×ul_carrier_id+14×80×8×2×bm_id,

[0091] Determine the first RA-RNTI;

[0092] Wherein, RA-RNTI represents the temporary identifier of the first random access radio network, s_id represents the index of the first orthogonal frequency division multiplexing (OFDM) symbol in which the PRACH timing occurs, t_id represents the index of the first time slot of the system frame in which the PRACH timing occurs, f_id represents the index of the PRACH timing in the frequency domain, ul_carrier_id indicates the uplink carrier used for random access preamble transmission, and bm_id represents the index of the beam in which the PRACH timing occurs.

[0093] Optionally, if the first region is a portion of the beam service area, determining the first RA-RNTI based on the location index of the beam where the PRACH timing occurs includes:

[0094] According to the formula:

[0095] RA-RNTI=1+s_id+14×t_id+14×80×f_id+14×80×8×ul_carrier_id+14×80×8×2×bl_id,

[0096] Calculate the first RA-RNTI;

[0097] Wherein, RA-RNTI represents the temporary identifier of the first random access radio network, s_id represents the index of the first orthogonal frequency division multiplexing (OFDM) symbol where the PRACH timing occurs, t_id represents the index of the first time slot of the system frame where the PRACH timing occurs, f_id represents the index of the PRACH timing in the frequency domain, ul_carrier_id indicates the uplink carrier used for random access preamble transmission, and bl_id represents the position index of the beam where the PRACH timing occurs.

[0098] This application also provides a random access device, including a memory, a transceiver, and a processor:

[0099] A memory for storing computer programs; a transceiver for sending and receiving data under the control of the processor; and a processor for reading the computer programs from the memory and performing the following operations:

[0100] The transceiver receives random access requests sent by the user equipment (UE).

[0101] According to the random access request, a random access response (RAR) is sent through the transceiver. The RAR corresponds to a first area range, which is determined based on the beam service area, which is the service area corresponding to the beam sent by the network-side device.

[0102] Optionally, the first region is the beam service area or a portion of the beam service area.

[0103] Optionally, the target feature parameters corresponding to the same partial area in the beam service area are the same.

[0104] Optionally, the target feature parameters include one or more of the following:

[0105] The first specific angular range relative to the satellite's elevation angle;

[0106] The first specific range of distances relative to the satellite;

[0107] The second specific angular range relative to the first specific reference point of the beam service area;

[0108] The second specific distance range relative to the second specific reference point in the beam service area;

[0109] The satellite is associated with the network-side equipment.

[0110] Optionally, the processor is also configured to perform the following operations:

[0111] The transceiver sends a broadcast message indicating the random access resources of the UE within the first area.

[0112] Optionally, the load indication field of the RAR includes at least one of the following:

[0113] Beam frequency point, which corresponds to the center frequency point of the beam or a specific frequency point of the beam;

[0114] Beam pattern;

[0115] Location index; different location indices correspond to different first region ranges.

[0116] Optionally, the beam pattern includes one or more of the following:

[0117] Beam period;

[0118] Service hours.

[0119] Optionally, the service time includes one or more of the following:

[0120] Start time;

[0121] Duration;

[0122] End time.

[0123] Optionally, the service time is any one of the following:

[0124] A continuous period of time;

[0125] Discrete time periods.

[0126] Optionally, when the processor sends a Random Access Response (RAR) via the transceiver, it performs the following operations:

[0127] If the first area range is the beam service area or a part of the beam service area, the network-side device sends a RAR corresponding to the first area range;

[0128] Alternatively, if the first area is the beam service area, the network-side device sends multiple RARs, each RAR corresponding to a different portion of the beam service area.

[0129] Optionally, when the processor sends a Random Access Response (RAR) via the transceiver in accordance with the random access request, it performs the following operations:

[0130] Based on the random access request and the first index, a first random access radio network temporary identifier RA-RNTI is determined, wherein the first index is the index of the beam in which the physical random access channel PRACH timing occurs or the location index of the beam in which the PRACH timing occurs.

[0131] The physical downlink control channel (PDCCH) corresponding to the physical downlink shared channel (PDSCH) carrying the RAR is scrambled using the first RA-RNTI;

[0132] Send the PDCCH and the PDSCH carrying the RAR.

[0133] Optionally, when the processor determines the first random access radio network temporary identifier (RA-RNTI) based on the random access request and the first index, it performs the following operations:

[0134] When the first region is within the beam service area, the first RA-RNTI is determined based on the index of the beam where the PRACH timing occurs;

[0135] Alternatively, if the first region is a portion of the beam service area, the first RA-RNTI is determined based on the location index of the beam where the PRACH timing occurs.

[0136] Optionally, when the processor determines the first RA-RNTI based on the index of the beam where the PRACH timing occurs, in the case where the first area range is the beam service area, it performs the following operations:

[0137] According to the formula:

[0138] RA-RNTI=1+s_id+14×t_id+14×80×f_id+14×80×8×ul_carrier_id+14×80×8×2×bm_id,

[0139] Determine the first RA-RNTI;

[0140] Wherein, RA-RNTI represents the temporary identifier of the first random access radio network, s_id represents the index of the first orthogonal frequency division multiplexing (OFDM) symbol in which the PRACH timing occurs, t_id represents the index of the first time slot of the system frame in which the PRACH timing occurs, f_id represents the index of the PRACH timing in the frequency domain, ul_carrier_id indicates the uplink carrier used for random access preamble transmission, and bm_id represents the index of the beam in which the PRACH timing occurs.

[0141] Optionally, when the processor determines the first RA-RNTI based on the location index of the beam where the PRACH timing occurs, in cases where the first region is a portion of the beam service area, the processor performs the following operations:

[0142] According to the formula:

[0143] RA-RNTI=1+s_id+14×t_id+14×80×f_id+14×80×8×ul_carrier_id+14×80×8×2×bl_id,

[0144] Calculate the first RA-RNTI;

[0145] Wherein, RA-RNTI represents the temporary identifier of the first random access radio network, s_id represents the index of the first orthogonal frequency division multiplexing (OFDM) symbol where the PRACH timing occurs, t_id represents the index of the first time slot of the system frame where the PRACH timing occurs, f_id represents the index of the PRACH timing in the frequency domain, ul_carrier_id indicates the uplink carrier used for random access preamble transmission, and bl_id represents the position index value of the beam where the PRACH timing occurs.

[0146] This application also provides a random access device, including a memory, a transceiver, and a processor:

[0147] A memory for storing computer programs; a transceiver for sending and receiving data under the control of the processor; and a processor for reading the computer programs from the memory and performing the following operations:

[0148] The transceiver sends a random access request to the network-side device.

[0149] The transceiver receives a Random Access Response (RAR) sent by the network-side device. The RAR corresponds to a first area range, which is determined based on the beam service area, which is the service area corresponding to the beam sent by the network-side device.

[0150] Optionally, the first region is the beam service area or a portion of the beam service area.

[0151] Optionally, the target feature parameters corresponding to the same partial area in the beam service area are the same.

[0152] Optionally, the target feature parameters include one or more of the following:

[0153] The first specific angular range relative to the satellite's elevation angle;

[0154] The first specific range of distances relative to the satellite;

[0155] The second specific angular range relative to the first specific reference point of the beam service area;

[0156] The second specific distance range relative to the second specific reference point in the beam service area;

[0157] The satellite is associated with the network-side equipment.

[0158] Optionally, the processor is further configured to:

[0159] The transceiver receives broadcast messages sent by the network-side device, the broadcast messages indicating random access resources for UEs within the first area.

[0160] Optionally, the load indication field of the RAR includes at least one of the following:

[0161] Beam frequency point, which corresponds to the center frequency point of the beam or a specific frequency point of the beam;

[0162] Beam pattern;

[0163] Location index; different location indices correspond to different first region ranges.

[0164] Optionally, the beam pattern includes one or more of the following:

[0165] Beam period;

[0166] Service hours.

[0167] Optionally, the service time includes one or more of the following:

[0168] Start time;

[0169] Duration;

[0170] End time.

[0171] Optionally, the service time is any one of the following:

[0172] A continuous period of time;

[0173] Discrete time periods.

[0174] Optionally, when the processor receives a Random Access Response (RAR) sent by the network-side device through the transceiver, it performs the following operations:

[0175] When the first area range is the beam service area or a part of the beam service area, the UE receives a RAR corresponding to the first area range sent by the network-side device;

[0176] Alternatively, if the first region is the beam service area, the UE receives multiple RARs sent by the network-side device, each RAR corresponding to a different part of the beam service area.

[0177] Optionally, the processor is also configured to perform the following operations:

[0178] Based on the random access resources and the first index, a first RA-RNTI is determined, wherein the first index is the index of the beam where the PRACH timing occurs or the position index of the beam where the PRACH timing occurs.

[0179] The PDCCH corresponding to the PDSCH carrying the RAR is descrambled using the first RA-RNTI.

[0180] Optionally, when the processor determines the first RA-RNTI based on the random access resource and the first index, it performs the following operations:

[0181] When the first region is the beam service area, the first RA-RNTI is determined according to the index of the beam where the PRACH timing is located or the location index of the beam where the PRACH timing is located.

[0182] Alternatively, if the first region is a portion of the beam service area, the first RA-RNTI is determined based on the location index of the beam where the PRACH timing occurs.

[0183] Optionally, when the processor determines the first RA-RNTI based on the index of the beam where the PRACH timing occurs, in the case where the first area range is the beam service area, it performs the following operations:

[0184] According to the formula:

[0185] RA-RNTI=1+s_id+14×t_id+14×80×f_id+14×80×8×ul_carrier_id+14×80×8×2×bm_id,

[0186] Determine the first RA-RNTI;

[0187] Wherein, RA-RNTI represents the temporary identifier of the first random access radio network, s_id represents the index of the first orthogonal frequency division multiplexing (OFDM) symbol in which the PRACH timing occurs, t_id represents the index of the first time slot of the system frame in which the PRACH timing occurs, f_id represents the index of the PRACH timing in the frequency domain, ul_carrier_id indicates the uplink carrier used for random access preamble transmission, and bm_id represents the index of the beam in which the PRACH timing occurs.

[0188] Optionally, when the processor determines the first RA-RNTI based on the location index of the beam where the PRACH timing occurs, in cases where the first region is a portion of the beam service area, the processor performs the following operations:

[0189] According to the formula:

[0190] RA-RNTI=1+s_id+14×t_id+14×80×f_id+14×80×8×ul_carrier_id+14×80×8×2×bl_id,

[0191] Calculate the first RA-RNTI;

[0192] Wherein, RA-RNTI represents the temporary identifier of the first random access radio network, s_id represents the index of the first orthogonal frequency division multiplexing (OFDM) symbol where the PRACH timing occurs, t_id represents the index of the first time slot of the system frame where the PRACH timing occurs, f_id represents the index of the PRACH timing in the frequency domain, ul_carrier_id indicates the uplink carrier used for random access preamble transmission, and bl_id represents the position index of the beam where the PRACH timing occurs.

[0193] This application also provides an information processing apparatus, including:

[0194] The first receiving unit is used to receive random access requests sent by the user equipment (UE).

[0195] The first sending unit is configured to send a random access response (RAR) according to the random access request. The RAR corresponds to a first area range, which is determined based on the beam service area, which is the service area corresponding to the beam sent by the network-side device.

[0196] This application also provides an information processing apparatus, including:

[0197] The second sending unit is used to send random access requests to network-side devices;

[0198] The second receiving unit is used to receive a Random Access Response (RAR) sent by the network-side device. The RAR corresponds to a first area range, which is determined based on the beam service area. The beam service area is the service area corresponding to the beam sent by the network-side device.

[0199] This application embodiment also provides a processor-readable storage medium, characterized in that the processor-readable storage medium stores program instructions, the program instructions being used to cause the processor to perform the steps of the random access method as described above.

[0200] The above-mentioned technical solution of this application has at least the following beneficial effects:

[0201] In the above technical solution of this application embodiment, the network-side device receives a random access request sent by a user equipment (UE); the network-side device sends a random access response (RAR) according to the random access request, the RAR corresponding to a first area range, the first area range being determined based on a beam service area, the beam service area being the service area corresponding to the beam sent by the network-side device. In this way, a single RAR is effective for multiple UEs with common characteristics, solving the problem of wasted time and frequency resources caused by the network-side device needing multiple RARs to complete the transmission of random access response information for multiple UEs with common characteristics. Attached Figure Description

[0202] Figure 1 This is a structural diagram of a network system applicable to embodiments of this application;

[0203] Figure 2 This is one of the flowcharts illustrating the random access method according to an embodiment of this application;

[0204] Figure 3 This is a schematic diagram of the first region range according to an embodiment of this application;

[0205] Figure 4This is a second schematic flowchart of the random access method according to an embodiment of this application;

[0206] Figure 5 This is one of the structural schematic diagrams of a random access device according to an embodiment of this application;

[0207] Figure 6 This is a second schematic diagram of the structure of the random access device according to an embodiment of this application;

[0208] Figure 7 This is the third schematic diagram of the structure of the random access device according to an embodiment of this application;

[0209] Figure 8 This is the fourth schematic diagram of the structure of the random access device according to an embodiment of this application. Detailed Implementation

[0210] The technical solutions provided in this application can be applied to various systems, especially 5G systems. For example, applicable systems include Global System for Mobile communication (GSM), Code Division Multiple Access (CDMA), Wideband Code Division Multiple Access (WCDMA), Time Division Synchronous Code Division Multiple Access (TD-SCDMA), General Packet Radio Service (GPRS), Long Term Evolution (LTE) systems (including TD-LTE and FDD-LTE), Long Term Evolution Advanced (LTE-A), Universal Mobile Telecommunication System (UMTS), Worldwide Interoperability for Microwave Access (WiMAX), and 5G New Radio (NR). All of these systems include terminal equipment and network equipment. The system may also include a core network component, such as the Evolved Packet System (EPS) or the 5G system (5GS / 5GC).

[0211] Figure 1This diagram illustrates a block diagram of a wireless communication system applicable to embodiments of this application. The wireless communication system includes a terminal 11 and a network device 12. The terminal 11 can also be referred to as a terminal device or user equipment (UE). The terminal 11 can be a mobile phone, tablet computer, laptop computer, personal digital assistant (PDA), handheld computer, netbook, ultra-mobile personal computer (UMPC), mobile internet device (MID), wearable device, vehicle-mounted device (VUE), pedestrian terminal (PUE), or other terminal-side devices. Wearable devices include wristbands, headphones, glasses, etc. It should be noted that this application does not limit the specific type of terminal 11. Network device 12 can be a base station or a core network. The base station can be referred to as a node B, evolved node B, access point, base transceiver station (BTS), radio base station, radio transceiver, basic service set (BSS), extended service set (ESS), B node, evolved B node (eNB), home B node, home evolved B node, WLAN access point, WiFi node, transmitting and receiving point (TRP), or any other suitable term in the field, as long as the same technical effect is achieved. The base station is not limited to specific technical terms. It should be noted that in this application embodiment, only the base station in the NR system is used as an example, but the specific type of base station is not limited.

[0212] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0213] like Figure 2 As shown in the figure, this application provides a random access method, including:

[0214] Step 201: The network-side device receives a random access request sent by the user equipment (UE);

[0215] Specifically, this step can be either the network-side device receiving message 1 (Massage1, Msg1) of the random access request sent by the UE, or the network-side device receiving message A (MassageA, MsgA) of the random access request sent by the UE.

[0216] Step 202: The network-side device sends a Random Access Response (RAR) according to the random access request. The RAR corresponds to a first area range, which is determined based on the beam service area. The beam service area is the service area corresponding to the beam sent by the network-side device.

[0217] It should be noted that the correspondence between the RAR and the first region range can mean that the RAR is effective for all or some UEs within the first region range.

[0218] It should also be noted that the first area range can be a specific location range or a specific area range set according to certain rules in the beam service area. This specific location range or specific area range can be part or all of the beam service area.

[0219] The random access method in this embodiment of the application involves a network-side device receiving a random access request sent by a user equipment (UE). Based on the random access request, the network-side device sends a Random Access Response (RAR), where the RAR corresponds to a first area range. This first area range is determined based on a beam service area, which is the service area corresponding to the beam sent by the network-side device. In this way, a single RAR is effective for multiple UEs (UEs located within the first area range) with common characteristics, solving the problem of wasted time and frequency resources caused by the network-side device needing multiple RARs to send random access response information to multiple UEs with common characteristics.

[0220] As an optional implementation method, such as Figure 3 As shown, the first region is the beam service area or a portion of the beam service area.

[0221] It should be noted that the first area range is the entire area of ​​the beam service area. Therefore, the RAR is effective for all or some UEs within the beam service area. In other words, all UEs within the beam service area can use only a specific beam (Beam_Specific) RAR to send random access response messages.

[0222] When the first area is a portion of the beam service area, the RAR is effective for all or some UEs within that portion of the beam service area. In other words, all or some UEs within that portion of the beam service area can send random access response messages using only a location-specific RAR.

[0223] For example, when a user's location is about to exceed the satellite's service area due to satellite movement, the Location_Specific RAR can be used to send the relevant beam frequency and LocationIndex information of the satellite to be switched to to that area, which facilitates the UE's rapid switching.

[0224] As an optional implementation, the target feature parameters corresponding to the same partial area in the beam service area are the same.

[0225] When the first region is a part of the beam service area, the first region has common characteristics, that is, the beam service area can be divided based on the common characteristics of the region.

[0226] As a specific implementation, the target feature parameters include one or more of the following:

[0227] The first specific angular range relative to the satellite's elevation angle;

[0228] The first specific range of distances relative to the satellite;

[0229] The second specific angular range relative to the first specific reference point of the beam service area;

[0230] The second specific distance range relative to the second specific reference point in the beam service area;

[0231] The satellite is associated with the network-side equipment.

[0232] In this specific implementation, when determining the first area range based on the beam service area, it can be determined based on at least one of the following: the elevation angle of the first area range relative to the satellite, the distance of the first area range relative to the satellite, the angular range of the first area range relative to a first specific reference point of the beam service area, and the distance of the first area range relative to a second specific reference point of the beam service area; that is, the elevation angle of the first area range relative to the satellite should be within the first specific angular range; or, the distance of the first area range relative to the satellite should be within the first specific distance range; or, the angular range of the first area range relative to the first specific reference point of the beam service area should be within the second specific angular range; or, the distance of the first area range relative to the second specific reference point of the beam service area should be within the second specific distance range.

[0233] It should be noted that when the network-side device is a gateway station and the gateway station is in the air, the first area range can be determined based on the elevation angle relative to the satellite and / or the distance relative to the satellite; when the gateway station is on the ground, the first area range can be determined based on at least one of the elevation angle relative to the satellite, the distance relative to the satellite, the angle of a first specific reference point relative to the beam service area, and the distance of a second specific reference point relative to the beam service area.

[0234] The first specific reference point of the beam service area can be the center point of the beam service area or the sub-satellite point of the beam service area, but is not limited thereto; in addition, the first specific reference point and the second specific reference point can be the same or different.

[0235] Furthermore, as an optional implementation, in step 201, before the network-side device receives the random access request sent by the user equipment (UE), the method further includes:

[0236] The network-side device sends a broadcast message, which indicates the random access resources of the UE within the first area.

[0237] In this optional implementation, the broadcast message carries information such as a random access sequence, used to configure Physical Random Access Channel (PRACH) resources for random access for UEs within the first area; specifically, the broadcast message includes, but is not limited to, one or more of the following:

[0238] Preamble sequence;

[0239] PRACH's time-domain configuration resources;

[0240] Frequency domain configuration resources for PRACH.

[0241] As an optional implementation, the load indication field of the RAR includes at least one of the following:

[0242] Beam frequency point, which corresponds to the center frequency point of the beam or a specific frequency point of the beam;

[0243] Beam pattern;

[0244] Location index: different location indices correspond to different first region ranges.

[0245] In this optional implementation, an information field is added to the existing RAR load indication field based on the existing RAR format, ensuring that the RAR load indication field contains at least one of the following: beam frequency, beam pattern, and location index. Thus, the UE can determine whether the received RAR is valid for itself based on this information.

[0246] Among them, Beam Frequency indicates the beam frequency point, and generally one beam corresponds to one beam frequency point. The beam frequency point corresponds to the center frequency point of the frequency domain resource where the beam is located; Beam Pattern indicates beam pattern information; Location Index indicates the location range with a certain characteristic within the beam service area or a specific location range set according to a certain rule. Different location ranges correspond to different Location Indexes.

[0247] As a specific implementation, the beam pattern includes, but is not limited to, one or more of the following:

[0248] Beam period;

[0249] Service hours.

[0250] It should be noted that the beam period generally corresponds to the beam retrace period in a hop beam scenario.

[0251] Specifically, the service time includes one or more of the following:

[0252] Start time;

[0253] Duration;

[0254] End time.

[0255] In other words, the service time may include the start time and duration; or, may include the start time and end time; or, may include the duration and end time; or, may include only any one of the start time, duration, and end time.

[0256] Specifically, the service time is any one of the following:

[0257] A continuous period of time;

[0258] Discrete time periods.

[0259] In continuous beam coverage scenarios, the service time is a continuous period of time; in hopping beam scenarios, the service time is either a continuous period of time or a discrete period of time.

[0260] When the service time is a discrete time period, the service time includes multiple start times, multiple end times and / or multiple durations.

[0261] As an optional implementation, step 202 involves sending a Random Access Response (RAR), including:

[0262] If the first area range is the beam service area or a part of the beam service area, the network-side device sends a RAR corresponding to the first area range;

[0263] Alternatively, if the first area is the beam service area, the network-side device sends multiple RARs, each RAR corresponding to a different portion of the beam service area.

[0264] In other words, when the first area range is the entirety or a portion of the beam service area, the network-side device can send a beam-specific RAR or a location-specific RAR that is valid for all or some UEs within the first area range. This reduces the total number of RARs within the first area range, lowers the random access failure rate, accelerates the random access time, and saves resources.

[0265] When the first region encompasses the entirety of the beam service area, the network-side device can also send multiple RARs corresponding to each of the sub-regions of the beam service area. That is, the network-side device sends multiple RARs, each RAR being valid for all UEs within a sub-region of the beam service area. For example, if the beam service area is divided into three sub-regions, the network-side device can simultaneously send three location-specific RARs. This reduces the total number of RARs within the beam service area, thereby lowering the random access failure rate, accelerating the random access time, and saving resources.

[0266] As an optional implementation, step 202, the network-side device sends a Random Access Response (RAR) based on the random access request, including:

[0267] The network-side device determines the first random access radio network temporary identity (RA-RNTI) based on the random access request and the first index. The first index is the index of the beam where the physical random access channel (PRACH) timing occurs or the location index of the beam where the PRACH timing occurs.

[0268] In this step, the first RA-RNTI is determined based on the RO resource (PRACH timing) of the random access request and the first index. In other words, after receiving the random access request, the network-side device determines the first RA-RNTI based on the RO resource of the random access request and the first index.

[0269] The network-side device uses the first RA-RNTI to scramble the physical downlink control channel (PDCCH) corresponding to the physical downlink shared channel (PDSCH) carrying the RAR;

[0270] In this step, the PDCCH corresponding to the PDSCH carrying the RAR is a PDCCH carrying relevant information of the PDSCH, so that the UE can obtain the RAR carried in the PDSCH by descrambling the PDCCH.

[0271] The network-side device sends the PDCCH and the PDSCH carrying the RAR.

[0272] In this optional implementation, the PDCCH is scrambled using the first RA-RNTI, so that after the UE receives the RAR, it can obtain the information carried in the RAR by descrambling, thereby determining whether the access was successful.

[0273] As a specific implementation, the network-side device determines the first random access radio network temporary identifier (RA-RNTI) based on the random access request and the first index, including:

[0274] When the first region is within the beam service area, the first RA-RNTI is determined based on the index of the beam where the PRACH timing occurs;

[0275] Alternatively, if the first region is a portion of the beam service area, the first RA-RNTI is determined based on the location index of the beam where the PRACH timing occurs.

[0276] In other words, depending on the range of the first region, different indices can be used to calculate the first RA-RNTI. For example, when the range of the first region is the beam service area, the first RA-RNTI can be calculated based on the index of the beam where the PRACH timing is located. When the range of the first region is a part of the beam service area, the first RA-RNTI can be calculated based on the location index of the beam where the PRACH timing is located.

[0277] As a specific implementation, when the first area range is the beam service area, the first RA-RNTI is determined according to the index of the beam where the PRACH timing occurs, including:

[0278] According to the formula:

[0279] RA-RNTI=1+s_id+14×t_id+14×80×f_id+14×80×8×ul_carrier_id+14×80×8×2×bm_id,

[0280] Determine the first RA-RNTI;

[0281] Wherein, RA-RNTI represents the temporary identifier of the first random access radio network, s_id represents the index of the first orthogonal frequency division multiplexing (OFDM) symbol in which the PRACH timing occurs, t_id represents the index of the first time slot of the system frame in which the PRACH timing occurs, f_id represents the index of the PRACH timing in the frequency domain, ul_carrier_id indicates the uplink carrier used for random access preamble transmission, and bm_id represents the index of the beam in which the PRACH timing occurs.

[0282] This optional implementation calculates the first RA-RNTI by using the index of the beam where the PRACH timing occurs, enabling all UEs corresponding to the beam where the PRACH timing occurs to descramble the PDCCH sent by the network-side equipment to obtain the RAR carried in the PDSCH. This achieves that one RAR is effective for multiple UEs, reducing the total number of RARs.

[0283] As another specific implementation, when the first region is a portion of the beam service area, determining the first RA-RNTI based on the location index of the beam where the PRACH timing occurs includes:

[0284] According to the formula:

[0285] RA-RNTI=1+s_id+14×t_id+14×80×f_id+14×80×8×ul_carrier_id+14×80×8×2×bl_id,

[0286] Calculate the first RA-RNTI;

[0287] Wherein, RA-RNTI represents the temporary identifier of the first random access radio network, s_id represents the index of the first orthogonal frequency division multiplexing (OFDM) symbol where the PRACH timing occurs, t_id represents the index of the first time slot of the system frame where the PRACH timing occurs, f_id represents the index of the PRACH timing in the frequency domain, ul_carrier_id indicates the uplink carrier used for random access preamble transmission, and bl_id represents the position index of the beam where the PRACH timing occurs.

[0288] This optional implementation calculates the first RA-RNTI using the location index of the beam where the PRACH timing occurs, enabling all UEs corresponding to the location index of the beam where the PRACH timing occurs (i.e., UEs using the location index of the beam where the PRACH timing occurs) to descramble the PDCCH sent by the network-side device to obtain the RAR carried in the PDSCH. This achieves that one RAR is effective for multiple UEs, reducing the total number of RARs.

[0289] The random access method of this application embodiment firstly involves a network-side device receiving a random access request sent by a UE. Secondly, the network-side device determines a first RA-RNTI based on the random access request and a first index. Thirdly, the network-side device uses the first RA-RNTI to scramble the PDCCH corresponding to the PDSCH carrying the RAR. Finally, the network-side device sends the PDCCH and the PDSCH carrying the RAR, so that all or some UEs within a first area can descramble the received information based on the calculated first RA-RNTI to obtain RAR information. This allows one RAR to be effective for multiple UEs within the first area, thereby reducing the total number of RARs within the first area, lowering the random access failure rate, accelerating the random access time, and saving resources.

[0290] like Figure 4 As shown in the embodiments of this application, a random access method is also provided, including:

[0291] Step 401: The UE sends a random access request to the network-side device;

[0292] Specifically, this step can be either the UE sending a random access request message 1 (Massage1, Msg1) or the network-side device receiving a random access request message A (MassageA, MsgA) sent by the UE.

[0293] Step 402: The UE receives a Random Access Response (RAR) sent by the network-side device. The RAR corresponds to a first area range, which is determined based on the beam service area. The beam service area is the service area corresponding to the beam sent by the network-side device.

[0294] It should be noted that the correspondence between the RAR and the first region range can mean that the RAR is effective for all or some UEs within the first region range.

[0295] It should also be noted that the first area range can be a specific location range or a specific area range set according to certain rules in the beam service area; such a specific location range or specific area range can be part or all of the beam service area.

[0296] In the random access method of this application embodiment, the UE sends a random access request to the network-side device; according to the random access request, the UE receives a Random Access Response (RAR) sent by the network-side device. The RAR corresponds to a first area range, which is determined based on a beam service area, which is the service area corresponding to the beam sent by the network-side device. In this way, a single RAR is effective for multiple UEs (UEs located within the first area range) with common characteristics, solving the problem of wasted time and frequency resources caused by the network-side device needing multiple RARs to complete the transmission of random access response information for multiple UEs with common characteristics.

[0297] As an optional implementation, the first region may be the beam service area or a portion thereof.

[0298] It should be noted that the first area range is the entire area of ​​the beam service area. Therefore, the RAR is effective for all or some UEs within the beam service area. In other words, all UEs within the beam service area can use only a specific beam (Beam_Specific) RAR to send random access response messages.

[0299] When the first area is a part of the beam service area, the RAR is effective for all or some UEs within the part of the beam service area. That is, all or some UEs within the part of the beam service area can send random access response messages using only a location-specific RAR.

[0300] For example, when a user's location is about to exceed the satellite's service area due to satellite movement, the Location_Specific RAR can be used to send the relevant beam frequency and LocationIndex information of the satellite to be switched to to that area, which facilitates the UE's rapid switching.

[0301] As an optional implementation, the target feature parameters corresponding to the same partial area in the beam service area are the same.

[0302] When the first region is a part of the beam service area, the first region has common characteristics, that is, the beam service area can be divided based on the common characteristics of the region.

[0303] As a specific implementation, the target feature parameters include one or more of the following:

[0304] The first specific angular range relative to the satellite's elevation angle;

[0305] The first specific range of distances relative to the satellite;

[0306] The second specific angular range relative to the first specific reference point of the beam service area;

[0307] The second specific distance range relative to the second specific reference point in the beam service area;

[0308] The satellite is associated with the network-side equipment.

[0309] In this specific implementation, when determining the first area range based on the beam service area, it can be determined based on at least one of the following: the elevation angle of the first area range relative to the satellite, the distance of the first area range relative to the satellite, the angular range of the first area range relative to a first specific reference point of the beam service area, and the distance of the first area range relative to a second specific reference point of the beam service area; that is, the elevation angle of the first area range relative to the satellite should be within the first specific angular range; or, the distance of the first area range relative to the satellite should be within the first specific distance range; or, the angular range of the first area range relative to the first specific reference point of the beam service area should be within the second specific angular range; or, the distance of the first area range relative to the second specific reference point of the beam service area should be within the second specific distance range.

[0310] It should be noted that when the network-side device is a gateway station and the gateway station is in the air, the first area range can be determined based on the elevation angle relative to the satellite and / or the distance relative to the satellite; when the gateway station is on the ground, the first area range can be determined based on at least one of the elevation angle relative to the satellite, the distance relative to the satellite, the angle of a first specific reference point relative to the beam service area, and the distance of a second specific reference point relative to the beam service area.

[0311] The first specific reference point of the beam service area can be the center point of the beam service area or the sub-satellite point of the beam service area, but is not limited thereto; in addition, the first specific reference point and the second specific reference point can be the same or different.

[0312] Furthermore, as an optional implementation, in step 401, before the UE sends a random access request to the network-side device, the method further includes:

[0313] The UE receives a broadcast message sent by the network-side device, the broadcast message indicating the random access resources of the UE within the first area.

[0314] In this optional implementation, the broadcast message carries information such as the random access sequence, used to configure Physical Random Access Channel (PRACH) resources for random access for UEs within the first area; so that the UE can determine the RA-RNTI for descrambling based on the RO resources. Specifically, the broadcast message includes, but is not limited to, one or more of the following:

[0315] Preamble sequence;

[0316] PRACH's time-domain configuration resources;

[0317] Frequency domain configuration resources for PRACH.

[0318] As an optional implementation, the load indication field of the RAR includes at least one of the following:

[0319] Beam frequency point, which corresponds to the center frequency point of the beam or a specific frequency point of the beam;

[0320] Beam pattern;

[0321] Location index: different location indices correspond to different first region ranges.

[0322] In this optional implementation, an information field is added to the existing RAR load indication field based on the existing RAR format, ensuring that the RAR load indication field contains at least one of the following: beam frequency, beam pattern, and location index information. Thus, the UE can determine whether the received RAR is valid for itself based on this information.

[0323] Among them, Beam Frequency indicates the beam frequency point, and generally one beam corresponds to one beam frequency point. The beam frequency point corresponds to the center frequency point of the frequency domain resource where the beam is located; Beam Pattern indicates beam pattern information; Location Index indicates the location range with a certain characteristic within the beam service area or a specific location range set according to a certain rule. Different location ranges correspond to different Location Indexes.

[0324] As a specific implementation, the beam pattern includes, but is not limited to, one or more of the following:

[0325] Beam period;

[0326] Service hours.

[0327] It should be noted that the beam period generally corresponds to the beam retrace period in a hop beam scenario.

[0328] Specifically, the service time includes one or more of the following:

[0329] Start time;

[0330] Duration;

[0331] End time.

[0332] In other words, the service time may include the start time and duration; or, may include the start time and end time; or, may include the duration and end time; or, may include only any one of the start time, duration, and end time.

[0333] Specifically, the service time is any one of the following:

[0334] A continuous period of time;

[0335] Discrete time periods.

[0336] In continuous beam coverage scenarios, the service time is a continuous period of time; in hopping beam scenarios, the service time is either a continuous period of time or a discrete period of time.

[0337] When the service time is a discrete time period, the service time includes multiple start times, multiple end times and / or multiple durations.

[0338] As an optional implementation, step 402, in which the UE receives the Random Access Response (RAR) sent by the network-side device, includes:

[0339] When the first area range is the beam service area or a part of the beam service area, the UE receives a RAR corresponding to the first area range sent by the network-side device;

[0340] Alternatively, if the first region is the beam service area, the UE receives multiple RARs sent by the network-side device, each RAR corresponding to a different part of the beam service area.

[0341] In other words, when the first area range is the entirety of the beam service area or a portion of the beam service area, the network-side device can send a beam-specific RAR or a location-specific RAR that is valid for all or some UEs within the first area range. This reduces the total number of RARs within the first area range, lowers the UE random access failure rate, accelerates the random access access time, and saves resources.

[0342] When the first region encompasses the entire beam service area, the network-side device can also send multiple RARs corresponding to each of the divided regions of the beam service area. That is, the network-side device sends multiple RARs, each RAR being valid for all or part of the UEs within a single region of the beam service area. For example, if the beam service area is divided into three regions, the network-side device can simultaneously send three location-specific RARs. When a UE receives a RAR, it can determine whether the RAR is valid for itself based on the information field of the RAR load information indication field. This allows multiple UEs to share the same RAR, reduces the total number of RARs within the beam service area, thereby reducing the failure rate of random access, accelerating the access time of random access, and saving resources.

[0343] Furthermore, as an optional implementation, after the UE receives the broadcast message sent by the network-side device, the method further includes:

[0344] The UE determines the first RA-RNTI based on the random access resources and the first index, where the first index is the index of the beam where the PRACH timing occurs or the position index of the beam where the PRACH timing occurs.

[0345] The UE uses the first RA-RNTI to descramble the PDCCH corresponding to the PDSCH carrying the RAR.

[0346] In this optional implementation, the UE uses the first RA-RNTI to descramble the PDCCH, obtains relevant information of the PDSCH, and then obtains RAR information from the PDSCH to determine whether the access is successful.

[0347] As an optional implementation, the UE determines the first RA-RNTI based on the random access resource and the first index, including:

[0348] When the first region is the beam service area, the first RA-RNTI is determined according to the index of the beam where the PRACH timing is located or the location index of the beam where the PRACH timing is located.

[0349] Alternatively, if the first region is a portion of the beam service area, the first RA-RNTI is determined based on the location index of the beam where the PRACH timing occurs.

[0350] In other words, depending on the range of the first region, different indices can be used to calculate the first RA-RNTI. For example, when the range of the first region is the beam service area, the first RA-RNTI can be calculated based on the index of the beam where the PRACH timing is located. When the range of the first region is a part of the beam service area, the first RA-RNTI can be calculated based on the location index of the beam where the PRACH timing is located.

[0351] As a specific implementation, when the first area range is the beam service area, the first RA-RNTI is determined according to the index of the beam where the PRACH timing occurs, including:

[0352] According to the formula:

[0353] RA-RNTI=1+s_id+14×t_id+14×80×f_id+14×80×8×ul_carrier_id+14×80×8×2×bm_id,

[0354] Determine the first RA-RNTI;

[0355] Wherein, RA-RNTI represents the temporary identifier of the first random access radio network, s_id represents the index of the first orthogonal frequency division multiplexing (OFDM) symbol in which the PRACH timing occurs, t_id represents the index of the first time slot of the system frame in which the PRACH timing occurs, f_id represents the index of the PRACH timing in the frequency domain, ul_carrier_id indicates the uplink carrier used for random access preamble transmission, and bm_id represents the index of the beam in which the PRACH timing occurs.

[0356] This optional implementation calculates the first RA-RNTI by using the index of the beam where the PRACH timing occurs, enabling all UEs corresponding to the beam where the PRACH timing occurs to descramble the PDCCH sent by the network-side equipment to obtain the RAR carried in the PDSCH. This achieves that one RAR is effective for multiple UEs, reducing the total number of RARs.

[0357] As another optional implementation, when the first region is a portion of the beam service area, the first RA-RNTI is determined based on the location index of the beam where the PRACH timing occurs, including:

[0358] According to the formula:

[0359] RA-RNTI=1+s_id+14×t_id+14×80×f_id+14×80×8×ul_carrier_id+14×80×8×2×bl_id,

[0360] Calculate the first RA-RNTI;

[0361] Wherein, RA-RNTI represents the temporary identifier of the first random access radio network, s_id represents the index of the first orthogonal frequency division multiplexing (OFDM) symbol where the PRACH timing occurs, t_id represents the index of the first time slot of the system frame where the PRACH timing occurs, f_id represents the index of the PRACH timing in the frequency domain, ul_carrier_id indicates the uplink carrier used for random access preamble transmission, and bl_id represents the position index of the beam where the PRACH timing occurs.

[0362] This optional implementation calculates the first RA-RNTI using the location index of the beam where the PRACH timing occurs, enabling all UEs corresponding to the location index of the beam where the PRACH timing occurs (i.e., UEs using the location index of the beam where the PRACH timing occurs) to descramble the PDCCH sent by the network-side device to obtain the RAR carried in the PDSCH. This achieves that one RAR is effective for multiple UEs, reducing the total number of RARs.

[0363] The random access method of this application will now be described with reference to specific embodiments:

[0364] Example 1: Four-step random access process

[0365] First, the network-side device sends a broadcast message carrying information such as a random access sequence. The broadcast message is used for PRACH resource configuration for random access, including but not limited to at least one of the following: a Preamble sequence, time-domain configuration resources and frequency-domain configuration resource information for PRACH.

[0366] Second, the UE receives a broadcast message carrying information such as a random access sequence. The broadcast message is used for PRACH resource configuration for random access and includes: a preamble sequence, time-domain configuration resources and frequency-domain configuration resource information for PRACH.

[0367] Third, the UE generates a corresponding Preamble sequence based on the broadcast message and sends Msg1 at the available Random access Occasion (RO).

[0368] Fourth, after receiving the random access request Msg1 sent by the UE, the network-side device generates a corresponding Msg2 including beam_specific / location_specific RAR based on the relevant information detected in Msg1 and sends it to the UE.

[0369] Fifth, the UE decodes the received Msg2, which includes beam_specific / location_specific RAR, to obtain R, Timing Advance Command (TAC), the uplink transmission resource (UL Grant) corresponding to Msg3, the Temporary C-RNTI used by the random access device, and at least one of the following three types of information: BeamFrequency, Beam Pattern, and Location Index.

[0370] Sixth, the UE sends Msg3, which is used to transmit the RRC connection establishment request, based on the information in the received Msg2;

[0371] Seventh, the network-side equipment receives Msg3 sent by the UE, completes the random access procedure based on the information contained in Msg3, and generates Msg4 to send back the relevant feedback information to the UE.

[0372] Eighth, the UE determines whether to complete the random access procedure based on the Msg4 information fed back by the network-side equipment.

[0373] Example 2: Two-step random access process

[0374] First, the network-side device sends a broadcast message carrying information such as a random access sequence. The broadcast message is used for PRACH resource configuration for random access, including but not limited to: a Preamble sequence, one or more of the time-domain configuration resources and frequency-domain configuration resources of PRACH.

[0375] Second, the UE receives a broadcast message carrying information such as a random access sequence. The broadcast message is used for PRACH resource configuration for random access, including but not limited to: a Preamble sequence, one or more of the time-domain configuration resources and frequency-domain configuration resources of PRACH.

[0376] Third, the UE generates a corresponding Preamble sequence based on the broadcast message and sends MsgA on the transmittable RO resources;

[0377] Fourth, after receiving the random access request MsgA sent by the UE, the network-side device generates a corresponding MsgB including beam_specific / location_specific RAR based on the relevant information of the detected MsgA and sends it to the UE;

[0378] Fifth, the UE decodes the received MsgB, including beam_specific / location_specific RAR, to obtain UE Contention Resolution Identity, R, ChannelAccess-CPext, TransmitPower Control (TPC), HARQ Feedback Timing Indicator, PUCCH Resource Indicator, TAC, Cell Radio Network Temporary Identifier (C-RNTI), and at least one of the following three types of information: Beam frequency, Beam pattern, and Location Index, to determine whether the access process is complete.

[0379] Example 3: Scenario where the first region is the beam service area

[0380] For satellite beam application systems, a wide-coverage access beam and a small-range actual data service beam are used. Network-side equipment uses the access beam to send common characteristic information such as beam frequency and beam pattern to UEs within the beam service area.

[0381] For all UEs within a beam service area, beam_specific RAR can be used to send common characteristic information, such as beam frequency information, to all UEs.

[0382] The specific implementation process of this embodiment is as follows:

[0383] The network-side equipment sends a broadcast message in which the base station allocates PRACH resource configurations for random access to all UEs within its beam service area, including: the Preamble sequence, time-domain configuration resources and frequency-domain configuration resource information for PRACH.

[0384] All UEs within the beam service area utilize the configuration information in the received broadcast information to send a random access request signal or a preamble code on the same time-frequency resource (RA-RNTI). The base station sends a beam-specific RAR based on the received Msg1, where the beam-specific RAR contains at least one of the following three pieces of information:

[0385] Beam Frequency: The center frequency of the frequency domain resource in which the beam resides;

[0386] Beam Pattern: Includes, but is not limited to, beam period and service time;

[0387] Beam period: Generally corresponds to the beam retrace period in a hop beam scenario.

[0388] Service time: includes at least the start time and duration or end time. In continuous beam coverage scenarios, the service time is a continuous period of time. In hopping beam scenarios, the service time is either a continuous period of time or a discrete period of time.

[0389] Location Index: A location range within the beam service area that has a certain characteristic or a specific location range set according to a certain rule. Different location ranges correspond to different Location Indexes.

[0390] Here, RA-RNTI represents the time-frequency resources used when transmitting Msg1 / MsgA. The UE calculates RA-RNTI based on the index and RO of the beam corresponding to transmitting Msg1 / MsgA. After receiving Msg1 / MsgA, the base station calculates the corresponding RA-RNTI and uses the calculated RA-RNTI to scramble the PDCCH of Msg2 / MsgB. The UE uses the known RA-RNTI to descramble the PDCCH of Msg2 / MsgB to further obtain the RAR information of Msg2 / MsgB.

[0391] The RA-RNTI of Msg1 / MsgA is calculated as follows:

[0392] RA-RNTI=1+s_id+14×t_id+14×80×f_id+14×80×8×ul_carrier_id+14×80×8×2×bm_id

[0393] Where s_id: the index of the first OFDM symbol where the PRACH timing occurs;

[0394] t_id: The index of the first slot in the system frame where the PRACH event occurs;

[0395] f_id: The index of the PRACH timing in the frequency domain;

[0396] ul_carrier_id: Indicates the uplink carrier used for random access preamble transmission (0 indicates a regular uplink carrier, 1 indicates an additional uplink carrier);

[0397] bm_id: Index value of the beam where the PRACH timing occurs (0≤bm_id) <bm_max)。

[0398] The UE uses the information received in the access beam as prior information to perform a random access process in the serving beam. Common feature information in the UE access beam, such as beam frequency and beam pattern, can help the UE detect the broadcast information of the serving beam more quickly and reduce the time spent on blind detection of broadcast information.

[0399] Example 4: A scenario where the first area encompasses a portion of the beam service area.

[0400] Due to satellite movement, when a user's location is about to exceed the satellite's service area, location-specific RARs can be used to send information such as the relevant beam frequency and location index of the satellite to be switched to to UEs in a specific Location Index area, facilitating rapid UE switching.

[0401] For all UEs within a specific location range (first area range) set according to a certain rule, location_specific RAR can be used to send common characteristic information, such as location index information, to all UEs.

[0402] The specific implementation process of this embodiment is as follows:

[0403] The network-side device sends a broadcast message in which it allocates PRACH resource configurations for random access to UEs within different specific location ranges (first area ranges) set according to a certain rule. These configurations include: a preamble sequence, time-domain configuration resources and frequency-domain configuration resource information for PRACH, wherein all UEs within the specific location range use the same RO resources.

[0404] At this point, the RA-RNTI of Msg1 / MsgA is calculated as follows:

[0405] RA-RNTI=1+s_id+14×t_id+14×80×f_id+14×80×8×ul_carrier_id+14×80×8×2×bl_id

[0406] s_id: The index of the first OFDM symbol where the PRACH timing occurs;

[0407] t_id: The index of the first slot in the system frame where the PRACH event occurs;

[0408] f_id: The index of the PRACH timing in the frequency domain;

[0409] ul_carrier_id: Indicates the uplink carrier used for random access preamble transmission (0 indicates a regular uplink carrier, 1 indicates an additional uplink carrier);

[0410] bl_id: The location index of the beam where the PRACH timing occurs (0 ≤ bl_id) <bl_max)。

[0411] Based on the received Msg1 / MsgA, the network-side device sends a location-specific RAR for different specific location ranges (the first location range), wherein the location-specific RAR contains at least one of the following three types of information:

[0412] Beam Frequency: The center frequency of the frequency domain resource in which the beam resides;

[0413] Beam Pattern: Includes, but is not limited to, beam period and service time;

[0414] Beam period: Generally corresponds to the beam retrace period in a hop beam scenario.

[0415] Service time: includes at least the start time and duration or end time. In continuous beam coverage scenarios, the service time is a continuous period of time. In hopping beam scenarios, the service time is either a continuous period of time or a discrete period of time.

[0416] Location Index: A location range within the beam service area that has a certain characteristic or a specific location range set according to a certain rule. Different location ranges correspond to different Location Indexes.

[0417] The UE uses the location index, beam frequency, or beam pattern information in the received location-specific RAR information as prior information. When the handover command arrives or the handover condition is triggered, the UE can use the obtained prior information to complete the handover.

[0418] The random access method in this application embodiment, firstly, adds information fields to the RAR load indication field, ensuring that the RAR load indication field contains at least one of the following: beam frequency, beam pattern, and location index information. This newly added information can serve as common characteristic information. Secondly, beam-specific / location-specific RARs are designed for UEs within a beam service area sharing common characteristics or UEs within a specific location range defined by a certain rule. This allows all UEs within a beam service area sharing common characteristics or all UEs within a specific location range defined by a certain rule to send random access response information using only one beam-specific / location-specific RAR. For example, a beam-specific RAR can be used for all UEs within a beam service area of ​​a single beam, and a location-specific RAR can be used for all UEs with the same location index within the same beam service area. This reduces the total number of RARs within the specified range, lowers the random access failure rate, accelerates random access time, and saves resources.

[0419] like Figure 5 As shown in the illustration, this application also provides a random access device applied to a network-side device, including: a memory 520, a transceiver 500, and a processor 510.

[0420] The memory 520 is used to store computer programs; the transceiver 500 is used to send and receive data under the control of the processor; the processor 510 is used to read the computer program in the memory 520 and perform the following operations:

[0421] Receive random access requests sent by user equipment (UE) through transceiver 500;

[0422] According to the random access request, the transceiver 500 sends a random access response (RAR), which corresponds to a first area range. The first area range is determined based on the beam service area, which is the service area corresponding to the beam sent by the network-side device.

[0423] Optionally, the first region is the beam service area or a portion of the beam service area.

[0424] Optionally, the target feature parameters corresponding to the same partial area in the beam service area are the same.

[0425] Optionally, the target feature parameters include one or more of the following:

[0426] The first specific angular range relative to the satellite's elevation angle;

[0427] The first specific range of distances relative to the satellite;

[0428] The second specific angular range relative to the first specific reference point of the beam service area;

[0429] The second specific distance range relative to the second specific reference point in the beam service area;

[0430] The satellite is associated with the network-side equipment.

[0431] Optionally, the processor 510 is also configured to perform the following erase operation:

[0432] The transceiver 500 sends a broadcast message indicating the random access resources of the UE within the first area.

[0433] Optionally, the load indication field of the RAR includes at least one of the following:

[0434] Beam frequency point, which corresponds to the center frequency point of the beam or a specific frequency point of the beam;

[0435] Beam pattern;

[0436] Location index; different location indices correspond to different first region ranges.

[0437] Optionally, the beam pattern includes one or more of the following:

[0438] Beam period;

[0439] Service hours.

[0440] Optionally, the service time includes one or more of the following:

[0441] Start time;

[0442] Duration;

[0443] End time.

[0444] Optionally, the service time is any one of the following:

[0445] A continuous period of time;

[0446] Discrete time periods.

[0447] Optionally, when the processor 510 sends a Random Access Response (RAR) via the transceiver 500, it performs the following operations:

[0448] If the first area range is the beam service area or a part of the beam service area, the network-side device sends a RAR corresponding to the first area range;

[0449] Alternatively, if the first area is the beam service area, the network-side device sends multiple RARs, each RAR corresponding to a different portion of the beam service area.

[0450] Optionally, when the processor 510 sends a random access response (RAR) through the transceiver 500 in accordance with the random access request, it performs the following operations:

[0451] Based on the random access request and the first index, a first random access radio network temporary identifier RA-RNTI is determined, wherein the first index is the index of the beam in which the physical random access channel PRACH timing occurs or the location index of the beam in which the PRACH timing occurs.

[0452] The physical downlink control channel (PDCCH) corresponding to the physical downlink shared channel (PDSCH) carrying the RAR is scrambled using the first RA-RNTI;

[0453] Send the PDCCH and the PDSCH carrying the RAR.

[0454] Optionally, when the processor 510 determines the first random access radio network temporary identifier (RA-RNTI) based on the random access request and the first index, it performs the following operations:

[0455] When the first region is within the beam service area, the first RA-RNTI is determined based on the index of the beam where the PRACH timing occurs;

[0456] Alternatively, if the first region is a portion of the beam service area, the first RA-RNTI is determined based on the location index of the beam where the PRACH timing occurs.

[0457] Optionally, when the processor 510 determines the first RA-RNTI based on the index of the beam where the PRACH timing occurs, in the case where the first area range is the beam service area, it performs the following operations:

[0458] According to the formula:

[0459] RA-RNTI=1+s_id+14×t_id+14×80×f_id+14×80×8×ul_carrier_id+14×80×8×2×bm_id,

[0460] Determine the first RA-RNTI;

[0461] Wherein, RA-RNTI represents the temporary identifier of the first random access radio network, s_id represents the index of the first orthogonal frequency division multiplexing (OFDM) symbol in which the PRACH timing occurs, t_id represents the index of the first time slot of the system frame in which the PRACH timing occurs, f_id represents the index of the PRACH timing in the frequency domain, ul_carrier_id indicates the uplink carrier used for random access preamble transmission, and bm_id represents the index of the beam in which the PRACH timing occurs.

[0462] Optionally, when the processor 510 determines the first RA-RNTI based on the location index of the beam where the PRACH timing occurs, in the case where the first region is a portion of the beam service area, the processor 510 performs the following operations:

[0463] According to the formula:

[0464] RA-RNTI=1+s_id+14×t_id+14×80×f_id+14×80×8×ul_carrier_id+14×80×8×2×bl_id,

[0465] Calculate the first RA-RNTI;

[0466] Wherein, RA-RNTI represents the temporary identifier of the first random access radio network, s_id represents the index of the first orthogonal frequency division multiplexing (OFDM) symbol where the PRACH timing occurs, t_id represents the index of the first time slot of the system frame where the PRACH timing occurs, f_id represents the index of the PRACH timing in the frequency domain, ul_carrier_id indicates the uplink carrier used for random access preamble transmission, and bl_id represents the position index value of the beam where the PRACH timing occurs.

[0467] Among them, Figure 5In this context, the bus architecture can include any number of interconnected buses and bridges, specifically linking various circuits together, represented by one or more processors (processor 510) and memory (memory 520). The bus architecture can also link various other circuits such as peripheral devices, voltage regulators, and power management circuits, which are well known in the art and therefore will not be described further herein. The bus interface provides an interface. The transceiver 500 can be multiple elements, including transmitters and receivers, providing units for communicating with various other devices over transmission media, including wireless channels, wired channels, optical fibers, etc. The processor 510 is responsible for managing the bus architecture and general processing, and the memory 520 can store data used by the processor 510 during operation.

[0468] The processor 510 can be a central processing unit (CPU), an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA), or a complex programmable logic device (CPLD). The processor can also adopt a multi-core architecture.

[0469] It should be noted that the apparatus provided in this application embodiment can implement all the method steps implemented in the above random access method embodiment and can achieve the same technical effect. Here, the parts that are the same as those in the method embodiment and the beneficial effects will not be described in detail.

[0470] like Figure 6 As shown in the figure, this application embodiment also provides a random access device applied to a UE, including a memory 620, a transceiver 600, and a processor 610:

[0471] The memory 620 is used to store computer programs; the transceiver 600 is used to send and receive data under the control of the processor 610; the processor 610 is used to read the computer program in the memory 620 and perform the following operations:

[0472] The transceiver 600 sends a random access request to the network-side device.

[0473] The transceiver 600 receives a Random Access Response (RAR) sent by the network-side device. The RAR corresponds to a first area range, which is determined based on the beam service area, which is the service area corresponding to the beam sent by the network-side device.

[0474] Among them, Figure 6 In this context, the bus architecture can include any number of interconnected buses and bridges, specifically linking various circuits of one or more processors represented by processor 610 and memory represented by memory 620 together. The bus architecture can also link various other circuits such as peripheral devices, voltage regulators, and power management circuits, which are well known in the art and therefore will not be described further herein. The bus interface provides an interface. The transceiver 600 can be multiple components, including transmitters and receivers, providing a unit for communicating with various other devices over a transmission medium, including wireless channels, wired channels, optical fibers, etc. For different user equipment, the user interface 630 can also be an interface capable of connecting external or internal devices, including but not limited to keypads, displays, speakers, microphones, joysticks, etc.

[0475] The processor 610 is responsible for managing the bus architecture and general processing, while the memory 620 can store the data used by the processor 610 during operation.

[0476] Optionally, the processor 610 can be a CPU (Central Processing Unit), ASIC (Application Specific Integrated Circuit), FPGA (Field-Programmable Gate Array), or CPLD (Complex Programmable Logic Device), and the processor can also adopt a multi-core architecture.

[0477] Optionally, the first region is the beam service area or a portion of the beam service area.

[0478] Optionally, the target feature parameters corresponding to the same partial area in the beam service area are the same.

[0479] Optionally, the target feature parameters include one or more of the following:

[0480] The first specific angular range relative to the satellite's elevation angle;

[0481] The first specific range of distances relative to the satellite;

[0482] The second specific angular range relative to the first specific reference point of the beam service area;

[0483] The second specific distance range relative to the second specific reference point in the beam service area;

[0484] The satellite is associated with the network-side equipment.

[0485] Optionally, the processor 610 is further configured to:

[0486] The transceiver receives broadcast messages sent by the network-side device, the broadcast messages indicating random access resources for UEs within the first area.

[0487] Optionally, the load indication field of the RAR includes at least one of the following:

[0488] Beam frequency point, which corresponds to the center frequency point of the beam or a specific frequency point of the beam;

[0489] Beam pattern;

[0490] Location index; different location indices correspond to different first region ranges.

[0491] Optionally, the beam pattern includes one or more of the following:

[0492] Beam period;

[0493] Service hours.

[0494] Optionally, the service time includes one or more of the following:

[0495] Start time;

[0496] Duration;

[0497] End time.

[0498] Optionally, the service time is any one of the following:

[0499] A continuous period of time;

[0500] Discrete time periods.

[0501] Optionally, when the processor 610 receives a Random Access Response (RAR) sent by the network-side device through the transceiver 600, it performs the following operations:

[0502] When the first area range is the beam service area or a part of the beam service area, the UE receives a RAR corresponding to the first area range sent by the network-side device;

[0503] Alternatively, if the first region is the beam service area, the UE receives multiple RARs sent by the network-side device, each RAR corresponding to a different part of the beam service area.

[0504] Optionally, the processor 610 is also configured to perform the following operations:

[0505] Based on the random access resources and the first index, a first RA-RNTI is determined, wherein the first index is the index of the beam where the PRACH timing occurs or the position index of the beam where the PRACH timing occurs.

[0506] The PDCCH corresponding to the PDSCH carrying the RAR is descrambled using the first RA-RNTI.

[0507] Optionally, when determining the first RA-RNTI based on the random access resource and the first index, the processor 610 performs the following operations:

[0508] When the first region is the beam service area, the first RA-RNTI is determined according to the index of the beam where the PRACH timing is located or the location index of the beam where the PRACH timing is located.

[0509] Alternatively, if the first region is a portion of the beam service area, the first RA-RNTI is determined based on the location index of the beam where the PRACH timing occurs.

[0510] Optionally, when the processor 610 determines the first RA-RNTI based on the index of the beam where the PRACH timing occurs, in the case where the first area range is the beam service area, it performs the following operation: according to the formula:

[0511] RA-RNTI=1+s_id+14×t_id+14×80×f_id+14×80×8×ul_carrier_id+14×80×8×2×bm_id,

[0512] Determine the first RA-RNTI;

[0513] Wherein, RA-RNTI represents the temporary identifier of the first random access radio network, s_id represents the index of the first orthogonal frequency division multiplexing (OFDM) symbol in which the PRACH timing occurs, t_id represents the index of the first time slot of the system frame in which the PRACH timing occurs, f_id represents the index of the PRACH timing in the frequency domain, ul_carrier_id indicates the uplink carrier used for random access preamble transmission, and bm_id represents the index of the beam in which the PRACH timing occurs.

[0514] Optionally, when the processor 610 determines the first RA-RNTI based on the location index of the beam where the PRACH timing occurs, in the case where the first region is a portion of the beam service area, the processor 610 performs the following operations:

[0515] According to the formula:

[0516] RA-RNTI=1+s_id+14×t_id+14×80×f_id+14×80×8×ul_carrier_id+14×80×8×2×bl_id,

[0517] Calculate the first RA-RNTI;

[0518] Wherein, RA-RNTI represents the temporary identifier of the first random access radio network, s_id represents the index of the first orthogonal frequency division multiplexing (OFDM) symbol where the PRACH timing occurs, t_id represents the index of the first time slot of the system frame where the PRACH timing occurs, f_id represents the index of the PRACH timing in the frequency domain, ul_carrier_id indicates the uplink carrier used for random access preamble transmission, and bl_id represents the position index of the beam where the PRACH timing occurs.

[0519] It should be noted that the apparatus provided in this application embodiment can implement all the method steps implemented in the above random access method embodiment and can achieve the same technical effect. Here, the parts that are the same as those in the method embodiment and the beneficial effects will not be described in detail.

[0520] like Figure 7 As shown in the illustration, this application also provides a random access device, applied to a network-side device, comprising:

[0521] The first receiving unit 701 is used to receive a random access request sent by the user equipment (UE).

[0522] The first sending unit 702 is configured to send a random access response (RAR) according to the random access request. The RAR corresponds to a first area range, which is determined based on the beam service area, which is the service area corresponding to the beam sent by the network-side device.

[0523] In the random access device of this application embodiment, the first area range is the beam service area or a portion of the beam service area.

[0524] In the random access device of this application embodiment, the target feature parameters corresponding to the same partial area in the beam service area are the same.

[0525] In the random access device of this application embodiment, the target feature parameters include one or more of the following:

[0526] The first specific angular range relative to the satellite's elevation angle;

[0527] The first specific range of distances relative to the satellite;

[0528] The second specific angular range relative to the first specific reference point of the beam service area;

[0529] The second specific distance range relative to the second specific reference point in the beam service area;

[0530] The satellite is associated with the network-side equipment.

[0531] The random access device in this application embodiment further includes:

[0532] The third sending unit is configured to send a broadcast message before the first sending unit 702 receives a random access request sent by the user equipment (UE), the broadcast message indicating the random access resources of the UE within the first area.

[0533] In the random access device of this application embodiment, the load indication field of the RAR includes at least one of the following:

[0534] Beam frequency point, which corresponds to the center frequency point of the beam or a specific frequency point of the beam;

[0535] Beam pattern;

[0536] Location index; different location indices correspond to different first region ranges.

[0537] In the random access device of this application embodiment, the beam pattern includes one or more of the following:

[0538] Beam period;

[0539] Service hours.

[0540] In the random access device of this application embodiment, the service time includes one or more of the following:

[0541] Start time;

[0542] Duration;

[0543] End time.

[0544] In the random access device of this application embodiment, the service time is any one of the following:

[0545] A continuous period of time;

[0546] Discrete time periods.

[0547] In the random access device of this application embodiment, when the first sending unit 702 sends a random access response (RAR), it is specifically used to send a RAR corresponding to the first area range when the first area range is the beam service area or a part of the beam service area.

[0548] Alternatively, if the first area is the beam service area, the network-side device sends multiple RARs, each RAR corresponding to a different portion of the beam service area.

[0549] In the random access apparatus of this application embodiment, when the first sending unit 702 is used to send a random access response (RAR) according to the random access request, it is specifically used for:

[0550] Based on the random access request and the first index, a first random access radio network temporary identifier RA-RNTI is determined, wherein the first index is the index of the beam in which the physical random access channel PRACH timing occurs or the location index of the beam in which the PRACH timing occurs.

[0551] The physical downlink control channel (PDCCH) corresponding to the physical downlink shared channel (PDSCH) carrying the RAR is scrambled using the first RA-RNTI;

[0552] Send the PDCCH and the PDSCH carrying the RAR.

[0553] In the random access apparatus of this application embodiment, when the first sending unit 702 is used to determine the first random access radio network temporary identifier RA-RNTI based on the random access request and the first index, it is specifically used for:

[0554] When the first region is within the beam service area, the first RA-RNTI is determined based on the index of the beam where the PRACH timing occurs;

[0555] Alternatively, if the first region is a portion of the beam service area, the first RA-RNTI is determined based on the location index of the beam where the PRACH timing occurs.

[0556] In the random access device of this application embodiment, when the first transmitting unit 702 determines the first RA-RNTI according to the index of the beam where the PRACH timing occurs, in the case that the first area range is the beam service area, it is specifically used for:

[0557] According to the formula:

[0558] RA-RNTI=1+s_id+14×t_id+14×80×f_id+14×80×8×ul_carrier_id+14×80×8×2×bm_id,

[0559] Determine the first RA-RNTI;

[0560] Wherein, RA-RNTI represents the temporary identifier of the first random access radio network, s_id represents the index of the first orthogonal frequency division multiplexing (OFDM) symbol in which the PRACH timing occurs, t_id represents the index of the first time slot of the system frame in which the PRACH timing occurs, f_id represents the index of the PRACH timing in the frequency domain, ul_carrier_id indicates the uplink carrier used for random access preamble transmission, and bm_id represents the index of the beam in which the PRACH timing occurs.

[0561] In the random access device of this application embodiment, when the first transmitting unit 702 determines the first RA-RNTI based on the position index of the beam where the PRACH timing occurs, in the case that the first area range is a part of the beam service area, the specific function is as follows:

[0562] According to the formula:

[0563] RA-RNTI=1+s_id+14×t_id+14×80×f_id+14×80×8×ul_carrier_id+14×80×8×2×bl_id,

[0564] Calculate the first RA-RNTI;

[0565] Wherein, RA-RNTI represents the temporary identifier of the first random access radio network, s_id represents the index of the first orthogonal frequency division multiplexing (OFDM) symbol where the PRACH timing occurs, t_id represents the index of the first time slot of the system frame where the PRACH timing occurs, f_id represents the index of the PRACH timing in the frequency domain, ul_carrier_id indicates the uplink carrier used for random access preamble transmission, and bl_id represents the position index of the beam where the PRACH timing occurs.

[0566] It should be noted that the apparatus provided in this application embodiment can implement all the method steps implemented in the above random access method embodiment and can achieve the same technical effect. Here, the parts that are the same as those in the method embodiment and the beneficial effects will not be described in detail.

[0567] like Figure 8 As shown in the illustration, this application also provides a random access device applied to a UE, comprising:

[0568] The second sending unit 801 is used to send a random access request to the network-side device;

[0569] The second receiving unit 802 is used to receive a Random Access Response (RAR) sent by the network-side device. The RAR corresponds to a first area range, which is determined based on the beam service area. The beam service area is the service area corresponding to the beam sent by the network-side device.

[0570] In the random access device of this application embodiment, the first area range is the beam service area or a portion of the beam service area.

[0571] In the random access device of this application embodiment, the target feature parameters corresponding to the same partial area in the beam service area are the same.

[0572] In the random access device of this application embodiment, the target feature parameters include one or more of the following:

[0573] The first specific angular range relative to the satellite's elevation angle;

[0574] The first specific range of distances relative to the satellite;

[0575] The second specific angular range relative to the first specific reference point of the beam service area;

[0576] The second specific distance range relative to the second specific reference point in the beam service area;

[0577] The satellite is associated with the network-side equipment.

[0578] The random access device in this application embodiment further includes:

[0579] The third receiving unit is used to receive a broadcast message sent by the network-side device, the broadcast message indicating the random access resources of the UE within the first area.

[0580] In the random access device of this application embodiment, the load indication field of the RAR includes at least one of the following:

[0581] Beam frequency point, which corresponds to the center frequency point of the beam or a specific frequency point of the beam;

[0582] Beam pattern;

[0583] Location index; different location indices correspond to different first region ranges.

[0584] In the random access device of this application embodiment, the beam pattern includes one or more of the following:

[0585] Beam period;

[0586] Service hours.

[0587] In the random access device of this application embodiment, the service time includes one or more of the following:

[0588] Start time;

[0589] Duration;

[0590] End time.

[0591] In the random access device of this application embodiment, the service time is any one of the following:

[0592] A continuous period of time;

[0593] Discrete time periods.

[0594] In the random access device of this application embodiment, when the second receiving module is used to receive the Random Access Response (RAR) sent by the network-side device, it is specifically used for:

[0595] When the first area range is the beam service area or a part of the beam service area, the UE receives a RAR corresponding to the first area range sent by the network-side device;

[0596] Alternatively, if the first region is the beam service area, the UE receives multiple RARs sent by the network-side device, each RAR corresponding to a different part of the beam service area.

[0597] The random access device in this application embodiment further includes:

[0598] The determining unit is configured to determine the first RA-RNTI based on the random access resources and the first index, wherein the first index is the index of the beam where the PRACH timing occurs or the position index of the beam where the PRACH timing occurs.

[0599] The processing unit is used to descramble the PDCCH corresponding to the PDSCH carrying the RAR using the first RA-RNTI.

[0600] In the random access device of this application embodiment, the determining unit is specifically used for:

[0601] When the first region is the beam service area, the first RA-RNTI is determined according to the index of the beam where the PRACH timing is located or the location index of the beam where the PRACH timing is located.

[0602] Alternatively, if the first region is a portion of the beam service area, the first RA-RNTI is determined based on the location index of the beam where the PRACH timing occurs.

[0603] In the random access device of this application embodiment, when the determining unit determines the first RA-RNTI based on the index of the beam where the PRACH timing occurs, in the case that the first area range is the beam service area, it is specifically used for:

[0604] According to the formula:

[0605] RA-RNTI=1+s_id+14×t_id+14×80×f_id+14×80×8×ul_carrier_id+14×80×8×2×bm_id,

[0606] Determine the first RA-RNTI;

[0607] Wherein, RA-RNTI represents the temporary identifier of the first random access radio network, s_id represents the index of the first orthogonal frequency division multiplexing (OFDM) symbol in which the PRACH timing occurs, t_id represents the index of the first time slot of the system frame in which the PRACH timing occurs, f_id represents the index of the PRACH timing in the frequency domain, ul_carrier_id indicates the uplink carrier used for random access preamble transmission, and bm_id represents the index of the beam in which the PRACH timing occurs.

[0608] In the random access device of this application embodiment, when the determining unit determines the first RA-RNTI based on the position index of the beam where the PRACH timing occurs, in the case that the first area range is a part of the beam service area, the determining unit is specifically used for:

[0609] According to the formula:

[0610] RA-RNTI=1+s_id+14×t_id+14×80×f_id+14×80×8×ul_carrier_id+14×80×8×2×bl_id,

[0611] Calculate the first RA-RNTI;

[0612] Wherein, RA-RNTI represents the temporary identifier of the first random access radio network, s_id represents the index of the first orthogonal frequency division multiplexing (OFDM) symbol where the PRACH timing occurs, t_id represents the index of the first time slot of the system frame where the PRACH timing occurs, f_id represents the index of the PRACH timing in the frequency domain, ul_carrier_id indicates the uplink carrier used for random access preamble transmission, and bl_id represents the position index of the beam where the PRACH timing occurs.

[0613] It should be noted that the apparatus provided in this application embodiment can implement all the method steps implemented in the above random access method embodiment and can achieve the same technical effect. Here, the parts that are the same as those in the method embodiment and the beneficial effects will not be described in detail.

[0614] It should be noted that the division of units in the embodiments of this application is illustrative and only represents one logical functional division. In actual implementation, other division methods may be used. Furthermore, the functional units in the various embodiments of this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated units described above can be implemented in hardware or as software functional units.

[0615] If the integrated unit is implemented as a software functional unit and sold or used as an independent product, it can be stored in a processor-readable storage medium. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) or processor to execute all or part of the steps of the methods described in the various embodiments of this application. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0616] In some embodiments of this application, a processor-readable storage medium is also provided, the processor-readable storage medium storing program instructions for causing the processor to perform the following steps:

[0617] Receive random access requests sent by user equipment (UE);

[0618] Based on the random access request, a random access response (RAR) is sent. The RAR corresponds to a first area range, which is determined based on the beam service area, which is the service area corresponding to the beam sent by the network-side device.

[0619] or,

[0620] Send a random access request to the network-side device;

[0621] The network-side device receives a Random Access Response (RAR) sent by the network-side device. The RAR corresponds to a first area range, which is determined based on the beam service area, which is the service area corresponding to the beam sent by the network-side device.

[0622] When the program instruction is executed by the processor, it can implement all the implementation methods applied to the network-side device in the above random access method embodiments, or implement all the implementation methods applied to the UE in the above random access method embodiments. To avoid repetition, it will not be described again here.

[0623] The terminal devices involved in the embodiments of this application can be devices that provide voice and / or data connectivity to users, handheld devices with wireless connectivity, or other processing devices connected to a wireless modem. The names of the terminal devices may differ in different systems; for example, in a 5G system, a terminal device can be called User Equipment (UE). Wireless terminal devices can communicate with one or more core networks (CNs) via a Radio Access Network (RAN). Wireless terminal devices can be mobile terminal devices, such as mobile phones (or "cellular" phones) and computers with mobile terminal devices, for example, portable, pocket-sized, handheld, computer-embedded, or vehicle-mounted mobile devices that exchange voice and / or data with the RAN. Examples include Personal Communication Service (PCS) phones, cordless phones, Session Initiated Protocol (SIP) phones, Wireless Local Loop (WLL) stations, and Personal Digital Assistants (PDAs). Wireless terminal equipment can also be referred to as a system, subscriber unit, subscriber station, mobile station, mobile station, remote station, access point, remote terminal, access terminal, user terminal, user agent, or user device, but this application embodiment does not limit the terminology.

[0624] The network device involved in this application embodiment can be a base station, which may include multiple cells providing services to terminals. Depending on the specific application, a base station may also be called an access point, or a device in an access network that communicates with a wireless terminal device through one or more sectors on the air interface, or other names. The network device can be used to exchange received air frames with Internet Protocol (IP) packets, acting as a router between the wireless terminal device and the rest of the access network, where the rest of the access network may include an Internet Protocol (IP) communication network. The network device can also coordinate the attribute management of the air interface. For example, the network equipment involved in the embodiments of this application can be a base transceiver station (BTS) in a Global System for Mobile communications (GSM) or Code Division Multiple Access (CDMA) system, a 5G base station (gNB) in a next-generation 5G network architecture, an evolved Node B (eNB or e-NodeB) in a Long Term Evolution (LTE) system, a Home evolved Node B (HeNB), a relay node, a femto, a pico, etc., and is not limited in the embodiments of this application. In some network structures, the network equipment may include centralized unit (CU) nodes and distributed unit (DU) nodes, and the centralized unit and distributed unit may also be geographically separated.

[0625] Network devices and terminal devices can each use one or more antennas for multiple-input multiple-output (MIMO) transmission. MIMO transmission can be single-user MIMO (SU-MIMO) or multiple-user MIMO (MU-MIMO). Depending on the configuration and number of antenna combinations, MIMO transmission can be 2D-MIMO, 3D-MIMO, FD-MIMO, or massive-MIMO, and can also be diversity transmission, precoding transmission, or beamforming transmission, etc.

[0626] Those skilled in the art will understand that embodiments of this application can be provided as methods, systems, or computer program products. Therefore, this application can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, this application can take the form of a computer program product implemented on one or more computer-usable storage media (including, but not limited to, disk storage and optical storage) containing computer-usable program code.

[0627] This application is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of this application. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer-executable instructions. These computer-executable instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart... Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0628] These processor-executable instructions may also be stored in a processor-readable memory that can direct a computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in the processor-readable memory produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0629] These processors can execute instructions that can also be loaded onto a computer or other programmable data processing device, causing a series of operational steps to be performed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable device for implementing the process. Figure 1One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0630] Obviously, those skilled in the art can make various modifications and variations to this application without departing from the spirit and scope of this application. Therefore, if such modifications and variations fall within the scope of the claims of this application and their equivalents, this application also intends to include such modifications and variations.

Claims

1. A random access method, characterized in that, include: The network-side equipment receives a random access request sent by the user equipment (UE); The network-side device sends a Random Access Response (RAR) based on the random access request. The RAR corresponds to a first area range, which is determined based on a beam service area. The beam service area is the service area corresponding to the beam sent by the network-side device. The same portion of the beam service area corresponds to the same target feature parameters, which include one or more of the following: The first specific angular range relative to the satellite's elevation angle; The first specific range of distances relative to the satellite; The second specific angular range relative to the first specific reference point of the beam service area; The second specific distance range relative to the second specific reference point in the beam service area; The satellite is associated with the network-side equipment.

2. The method according to claim 1, characterized in that, The first region is the beam service area or a portion of the beam service area.

3. The method according to claim 1, characterized in that, Before the network-side equipment receives the random access request sent by the user equipment (UE), it also includes: The network-side device sends a broadcast message, which indicates the random access resources of the UE within the first area.

4. The method according to claim 1, characterized in that, The load indication field of the RAR includes at least one of the following: Beam frequency point, which corresponds to the center frequency point of the beam or a specific frequency point of the beam; Beam pattern; Location index; different location indices correspond to different first region ranges.

5. The method according to claim 4, characterized in that, The beam pattern includes one or more of the following: Beam period; Service hours.

6. The method according to claim 5, characterized in that, The service hours include one or more of the following: Start time; Duration; End time.

7. The method according to claim 6, characterized in that, The service time is any one of the following: A continuous period of time; Discrete time periods.

8. The method according to claim 1, characterized in that, Send a Random Access Response (RAR), including: If the first area range is the beam service area or a part of the beam service area, the network-side device sends a RAR corresponding to the first area range; Alternatively, if the first area is the beam service area, the network-side device sends multiple RARs, each RAR corresponding to a different portion of the beam service area.

9. The method according to claim 1, characterized in that, The network-side device sends a Random Access Response (RAR) based on the random access request, including: The network-side device determines the first random access radio network temporary identifier RA-RNTI based on the random access request and the first index, wherein the first index is the index of the beam in which the physical random access channel PRACH timing occurs or the location index of the beam in which the PRACH timing occurs. The network-side device uses the first RA-RNTI to scramble the physical downlink control channel (PDCCH) corresponding to the physical downlink shared channel (PDSCH) carrying the RAR; The network-side device sends the PDCCH and the PDSCH carrying the RAR.

10. The method according to claim 9, characterized in that, The network-side device determines the first random access radio network temporary identifier (RA-RNTI) based on the random access request and the first index, including: When the first region is within the beam service area, the first RA-RNTI is determined based on the index of the beam where the PRACH timing occurs; Alternatively, if the first region is a portion of the beam service area, the first RA-RNTI is determined based on the location index of the beam where the PRACH timing occurs.

11. The method according to claim 10, characterized in that, When the first region is within the beam service area, the first RA-RNTI is determined based on the index of the beam where the PRACH timing occurs, including: According to the formula: RA-RNTI=1+s_id+14×t_id+14×80×f_id+14×80×8×ul_carrier_id+14×80×8×2×bm_id, Determine the first RA-RNTI; Wherein, RA-RNTI represents the temporary identifier of the first random access radio network, s_id represents the index of the first orthogonal frequency division multiplexing (OFDM) symbol in which the PRACH timing occurs, t_id represents the index of the first time slot of the system frame in which the PRACH timing occurs, f_id represents the index of the PRACH timing in the frequency domain, ul_carrier_id indicates the uplink carrier used for random access preamble transmission, and bm_id represents the index of the beam in which the PRACH timing occurs.

12. The method according to claim 10, characterized in that, When the first region is a portion of the beam service area, determining the first RA-RNTI based on the location index of the beam where the PRACH timing occurs includes: According to the formula: RA-RNTI=1+s_id+14×t_id+14×80×f_id+14×80×8×ul_carrier_id+14×80×8×2×bl_id, Calculate the first RA-RNTI; Wherein, RA-RNTI represents the temporary identifier of the first random access radio network, s_id represents the index of the first orthogonal frequency division multiplexing (OFDM) symbol where the PRACH timing occurs, t_id represents the index of the first time slot of the system frame where the PRACH timing occurs, f_id represents the index of the PRACH timing in the frequency domain, ul_carrier_id indicates the uplink carrier used for random access preamble transmission, and bl_id represents the position index of the beam where the PRACH timing occurs.

13. A random access method, characterized in that, include: The UE sends a random access request to the network-side equipment; The UE receives a Random Access Response (RAR) sent by the network-side device. The RAR corresponds to a first area range, which is determined based on a beam service area. The beam service area is the service area corresponding to the beam sent by the network-side device. The target feature parameters corresponding to the same part of the beam service area are the same. The target feature parameters include one or more of the following: The first specific angular range relative to the satellite's elevation angle; The first specific range of distances relative to the satellite; The second specific angular range relative to the first specific reference point of the beam service area; The second specific distance range relative to the second specific reference point in the beam service area; The satellite is associated with the network-side equipment.

14. The method according to claim 13, characterized in that, The first region is the beam service area or a portion of the beam service area.

15. The method according to claim 13, characterized in that, Before the UE sends a random access request to the network-side equipment, it also includes: The UE receives a broadcast message sent by the network-side device, the broadcast message indicating the random access resources of the UE within the first area.

16. The method according to claim 13, characterized in that, The load indication field of the RAR includes at least one of the following: Beam frequency point, which corresponds to the center frequency point of the beam or a specific frequency point of the beam; Beam pattern; Location index; different location indices correspond to different first region ranges.

17. The method according to claim 16, characterized in that, The beam pattern includes one or more of the following: Beam period; Service hours.

18. The method according to claim 17, characterized in that, The service time includes one or more of the following: start time; duration; end time.

19. The method according to claim 18, characterized in that, The service time is any one of the following: A continuous period of time; Discrete time periods.

20. The method according to claim 13, characterized in that, The UE receives a Random Access Response (RAR) sent by the network-side device, including: When the first area range is the beam service area or a part of the beam service area, the UE receives a RAR corresponding to the first area range sent by the network-side device; Alternatively, if the first region is the beam service area, the UE receives multiple RARs sent by the network-side device, each RAR corresponding to a different part of the beam service area.

21. The method according to claim 15, characterized in that, The method further includes: The UE determines the first RA-RNTI based on the random access resources and the first index, where the first index is the index of the beam where the PRACH timing occurs or the position index of the beam where the PRACH timing occurs. The UE uses the first RA-RNTI to descramble the PDCCH corresponding to the PDSCH carrying the RAR.

22. The method according to claim 21, characterized in that, The UE determines the first RA-RNTI based on the random access resource and the first index, including: When the first region is the beam service area, the first RA-RNTI is determined according to the index of the beam where the PRACH timing is located or the location index of the beam where the PRACH timing is located. Alternatively, if the first region is a portion of the beam service area, the first RA-RNTI is determined based on the location index of the beam where the PRACH timing occurs.

23. The method according to claim 22, characterized in that, When the first region is within the beam service area, the first RA-RNTI is determined based on the index of the beam where the PRACH timing occurs, including: According to the formula: RA-RNTI=1+s_id+14×t_id+14×80×f_id+14×80×8×ul_carrier_id+14×80×8×2×bm_id, Determine the first RA-RNTI; Wherein, RA-RNTI represents the temporary identifier of the first random access radio network, s_id represents the index of the first orthogonal frequency division multiplexing (OFDM) symbol in which the PRACH timing occurs, t_id represents the index of the first time slot of the system frame in which the PRACH timing occurs, f_id represents the index of the PRACH timing in the frequency domain, ul_carrier_id indicates the uplink carrier used for random access preamble transmission, and bm_id represents the index of the beam in which the PRACH timing occurs.

24. The method according to claim 22, characterized in that, When the first region is a portion of the beam service area, determining the first RA-RNTI based on the location index of the beam where the PRACH timing occurs includes: According to the formula: RA-RNTI=1+s_id+14×t_id+14×80×f_id+14×80×8×ul_carrier_id+14×80×8×2×bl_id, Calculate the first RA-RNTI; Wherein, RA-RNTI represents the temporary identifier of the first random access radio network, s_id represents the index of the first orthogonal frequency division multiplexing (OFDM) symbol where the PRACH timing occurs, t_id represents the index of the first time slot of the system frame where the PRACH timing occurs, f_id represents the index of the PRACH timing in the frequency domain, ul_carrier_id indicates the uplink carrier used for random access preamble transmission, and bl_id represents the position index of the beam where the PRACH timing occurs.

25. A random access device, characterized in that, Includes memory, transceiver, and processor: Memory, used to store computer programs; Transceiver, used to send and receive data under the control of the processor; Processor, configured to read the computer program in the memory and perform the following operations: Receive random access requests sent by user equipment (UE) via transceiver; Based on the random access request, a random access response (RAR) is sent via the transceiver. The RAR corresponds to a first area range, which is determined based on a beam service area. The beam service area is the service area corresponding to the beam sent by the network-side device. The same portion of the beam service area corresponds to the same target feature parameters, which include one or more of the following: The first specific angular range relative to the satellite's elevation angle; The first specific range of distances relative to the satellite; The second specific angular range relative to the first specific reference point of the beam service area; The second specific distance range relative to the second specific reference point in the beam service area; The satellite is associated with the network-side equipment.

26. The apparatus according to claim 25, characterized in that, The first region is the beam service area or a portion of the beam service area.

27. The apparatus according to claim 25, characterized in that, The processor is also used to perform the following operations: The transceiver sends a broadcast message indicating the random access resources of the UE within the first area.

28. The apparatus according to claim 25, characterized in that, The load indication field of the RAR includes at least one of the following: Beam frequency point, which corresponds to the center frequency point of the beam or a specific frequency point of the beam; Beam pattern; Location index; different location indices correspond to different first region ranges.

29. The apparatus according to claim 25, characterized in that, When the processor sends a Random Access Response (RAR) via the transceiver in accordance with the random access request, it performs the following operations: Based on the random access request and the first index, a first random access radio network temporary identifier RA-RNTI is determined, wherein the first index is the index of the beam in which the physical random access channel PRACH timing occurs or the location index of the beam in which the PRACH timing occurs. The physical downlink control channel (PDCCH) corresponding to the physical downlink shared channel (PDSCH) carrying the RAR is scrambled using the first RA-RNTI; Send the PDCCH and the PDSCH carrying the RAR.

30. A random access device, characterized in that, Includes memory, transceiver, and processor: Memory, used to store computer programs; Transceiver, used to send and receive data under the control of the processor; Processor, configured to read the computer program in the memory and perform the following operations: The transceiver sends a random access request to the network-side device. The transceiver receives a Random Access Response (RAR) sent by the network-side device. The RAR corresponds to a first area range, which is determined based on a beam service area. The beam service area is the service area corresponding to the beam sent by the network-side device. Within the same portion of the beam service area, the target feature parameters are identical. These target feature parameters include one or more of the following: The first specific angular range relative to the satellite's elevation angle; The first specific range of distances relative to the satellite; The second specific angular range relative to the first specific reference point of the beam service area; The second specific distance range relative to the second specific reference point in the beam service area; The satellite is associated with the network-side equipment.

31. The apparatus according to claim 30, characterized in that, The processor is also used for: The transceiver receives broadcast messages sent by the network-side device, the broadcast messages indicating random access resources for UEs within the first area.

32. The apparatus according to claim 30, characterized in that, The processor is also used to perform the following operations: Based on the random access resources and the first index, a first RA-RNTI is determined, wherein the first index is the index of the beam where the PRACH timing occurs or the position index of the beam where the PRACH timing occurs. The PDCCH corresponding to the PDSCH carrying the RAR is descrambled using the first RA-RNTI.

33. A random access device, characterized in that, include: The first receiving unit is used to receive random access requests sent by the user equipment (UE). The first sending unit is configured to send a Random Access Response (RAR) according to the random access request. The RAR corresponds to a first area range, which is determined based on a beam service area. The beam service area is the service area corresponding to the beam sent by the network-side device. The same portion of the beam service area corresponds to the same target feature parameters, which include one or more of the following: The first specific angular range relative to the satellite's elevation angle; The first specific range of distances relative to the satellite; The second specific angular range relative to the first specific reference point of the beam service area; The second specific distance range relative to the second specific reference point in the beam service area; The satellite is associated with the network-side equipment.

34. A random access device, characterized in that, include: The second sending unit is used to send random access requests to network-side devices; The second receiving unit is configured to receive a Random Access Response (RAR) sent by the network-side device. The RAR corresponds to a first area range, which is determined based on a beam service area. The beam service area is the service area corresponding to the beam sent by the network-side device. The target feature parameters corresponding to the same portion of the beam service area are the same. The target feature parameters include one or more of the following: The first specific angular range relative to the satellite's elevation angle; The first specific range of distances relative to the satellite; The second specific angular range relative to the first specific reference point of the beam service area; The second specific distance range relative to the second specific reference point in the beam service area; The satellite is associated with the network-side equipment.

35. A processor-readable storage medium, characterized in that, The processor-readable storage medium stores program instructions for causing the processor to perform the steps of the random access method as described in any one of claims 1 to 24.

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