Random access method and device

Abstract

The embodiment of the application provides a kind of random access method and equipment, it is related to communication technical field, UE receives resource configuration information, including the association information of each SSB group and the RO resource in first RO resource set, when carrying out random access, determine target SSB group covering the current location of UE, and according to the above-mentioned association information, determine the first RO resource and the first random access preamble associated with target SSB group, and send the first random access preamble to network equipment on the above-mentioned first RO resource;Network equipment receives the above-mentioned first random access preamble on the first RO resource, can determine the target SSB group associated with the above-mentioned first RO resource according to the above-mentioned association information, and sends random access response message to UE in the direction corresponding to each SSB in the target SSB group, so the reliability of random access response message transmission can be effectively improved.

Description

Technical Field

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

[0002] With the further evolution of 5G technology, the need for enhanced uplink coverage in various communication scenarios (such as satellite communication) is becoming increasingly strong, especially for coverage enhancement in random access processes, including coverage enhancement of both uplink and downlink channels.

[0003] In satellite communications, due to the rapid movement of satellites, user equipment (UE) will switch beams during the random access response window. How to ensure the reliable transmission of random access response messages in this situation is a technical problem that urgently needs to be solved. Summary of the Invention

[0004] This application provides a random access method and device, which can solve the technical problem that it is currently difficult to guarantee the reliable transmission of random access response messages.

[0005] In a first aspect, this application provides a random access method applied in a UE, the method comprising:

[0006] The system receives resource configuration information, which includes configuration information for multiple Synchronization Signal and PBCH Block (SSB) groups, configuration information for a first Random Access Channel Occasion (RO) resource set, and association information between each SSB group and the RO resources in the first RO resource set; wherein each SSB group includes at least one SSB, and the first RO resource set includes multiple RO resources;

[0007] Identify the target SSB group that covers the current location of the UE in each SSB group, and determine the first RO resource associated with the target SSB group and the first random access preamble corresponding to the target SSB group based on the association information.

[0008] Send the first random access preamble to the network device on the first RO resource.

[0009] In one feasible implementation, the association information includes the number of SSB groups associated with each RO resource in the first RO resource set and / or the SSB group association period; wherein the SSB group association period includes at least one PRACH period.

[0010] In one feasible implementation, determining the target SSB group covering the current location of the UE in each of the SSB groups includes:

[0011] Based on the preset ephemeris information, satellite beam layout information, and the UE's current GNSS positioning information, the target SSB group covering the UE's current location is determined in each SSB group.

[0012] In one feasible implementation, determining the first random access preamble corresponding to the target SSB group includes:

[0013] Based on the associated information, determine the preamble index range corresponding to the target SSB group;

[0014] Select a target preamble index within the range of the preamble indexes, and use the preamble corresponding to the target preamble index as the first random access preamble corresponding to the target SSB group.

[0015] In one feasible implementation, after sending the first random access preamble to the network device on the first RO resource, the method further includes:

[0016] The network device receives random access response messages in the direction corresponding to each SSB within the target SSB group.

[0017] In one feasible implementation, the resource configuration information further includes:

[0018] The association information between each SSB and the RO resources in the first RO resource set;

[0019] A first preamble index range and a second preamble index range, wherein the preamble corresponding to the first preamble index range is used to associate with the SSB group, and the preamble corresponding to the second preamble index range is used to associate with the SSB.

[0020] In one feasible implementation, the association information between each SSB and the RO resources in the first RO resource set includes:

[0021] The number of SSBs associated with each RO resource in the first RO resource set and / or the SSB association period; wherein the SSB association period includes at least one PRACH period.

[0022] In one feasible implementation, it further includes:

[0023] Based on the preset ephemeris information, satellite beam layout information, and the UE's current GNSS positioning information, the target SSB that covers the UE's current location is determined among the various SSBs.

[0024] In one feasible implementation, determining the first random access preamble corresponding to the target SSB group includes:

[0025] Based on the association information between each SSB group and the RO resources in the first RO resource set, the first sub-preamble index range corresponding to the target SSB group within the first preamble index range is determined;

[0026] Select a target preamble index within the range of the first sub-preamble index, and use the preamble corresponding to the selected target preamble index as the first random access preamble corresponding to the target SSB group.

[0027] In one feasible implementation, sending the first random access preamble to the network device on the first RO resource includes:

[0028] Determine the coverage time of the target SSB;

[0029] When the coverage time is less than a preset duration threshold, the first random access preamble is sent to the network device on the first RO resource.

[0030] In one feasible implementation, when the coverage time is greater than or equal to the preset duration threshold, the second RO resource associated with the target SSB and the second random access preamble corresponding to the target SSB are determined based on the association information between each SSB and the RO resource in the first RO resource set, and the second random access preamble is sent to the network device on the second RO resource.

[0031] In one feasible implementation, determining the second random access preamble corresponding to the target SSB includes:

[0032] Based on the association information between each SSB and the RO resources in the first RO resource set, the second sub-preamble index range corresponding to the target SSB within the second preamble index range is determined;

[0033] Select a target preamble index within the range of the second sub-preamble index, and use the preamble corresponding to the selected target preamble index as the second random access preamble corresponding to the target SSB.

[0034] In one feasible implementation, after sending the second random access preamble to the network device on the second RO resource, the method further includes:

[0035] Receive the random access response message sent by the network device in the direction corresponding to the target SSB.

[0036] In one feasible implementation, the resource configuration information further includes:

[0037] The configuration information of the second RO resource set, and the association information between each SSB and the RO resources in the second RO resource set;

[0038] The second RO resource set includes multiple RO resources, and the first RO resource set and the second RO resource set are located in different positions in the time domain and / or frequency domain.

[0039] In one feasible implementation, the association information between each SSB and the RO resources in the second RO resource set includes:

[0040] The number of SSBs associated with each RO resource in the second RO resource set and / or the SSB association period; wherein the SSB association period includes at least one PRACH period.

[0041] In one feasible implementation, it further includes:

[0042] Based on the preset ephemeris information, satellite beam layout information, and the UE's current GNSS positioning information, the target SSB that covers the UE's current location is determined among the various SSBs.

[0043] In one feasible implementation, sending the first random access preamble to the network device on the first RO resource includes:

[0044] Determine the coverage time of the target SSB;

[0045] When the coverage time is less than a preset duration threshold, the first random access preamble is sent to the network device on the first RO resource;

[0046] When the coverage time is greater than or equal to the preset duration threshold, the third RO resource associated with the target SSB and the third random access preamble corresponding to the target SSB are determined according to the association information between each SSB and the RO resource in the second RO resource set, and the third random access preamble is sent to the network device on the third RO resource; wherein, the third RO resource belongs to the second RO resource set.

[0047] In one feasible implementation, after sending the third random access preamble to the network device on the third RO resource, the method further includes:

[0048] Receive the random access response message sent by the network device in the direction corresponding to the target SSB.

[0049] In one feasible implementation, it further includes:

[0050] The preset duration threshold is determined based on the random access response window;

[0051] Alternatively, the preset duration threshold can be determined based on the resource configuration information.

[0052] Secondly, this application provides a random access method in a network device, the method comprising:

[0053] Resource configuration information is sent to the UE. The resource configuration information includes configuration information of multiple SSB groups, configuration information of a first RO resource set, and association information between each SSB group and the RO resources in the first RO resource set. Each SSB group includes at least one SSB, and the first RO resource set includes multiple RO resources.

[0054] When the first random access preamble sent by the UE on the first RO resource in the first RO resource set is received, the target SSB group associated with the first RO resource is determined according to the association information, and a random access response message is sent to the UE in the direction corresponding to each SSB in the target SSB group.

[0055] In one feasible implementation, the association information includes the number of SSB groups associated with each RO resource in the first RO resource set and / or the SSB group association period; wherein the SSB group association period includes at least one PRACH period.

[0056] In one feasible implementation, the resource configuration information further includes:

[0057] The association information between each SSB and the RO resources in the first RO resource set;

[0058] A first preamble index range and a second preamble index range, wherein the preamble corresponding to the first preamble index range is used to associate with the SSB group, and the preamble corresponding to the second preamble index range is used to associate with the SSB.

[0059] In one feasible implementation, the association information between each SSB and the RO resources in the first RO resource set includes:

[0060] The number of SSBs associated with each RO resource in the first RO resource set and / or the SSB association period; wherein the SSB association period includes at least one PRACH period.

[0061] In one feasible implementation, when the second random access preamble sent by the UE on the second RO resource in the first RO resource set is received, the target SSB associated with the first RO resource is determined according to the association information between each SSB and the RO resource in the first RO resource set, and a random access response message is sent to the UE in the direction corresponding to the target SSB.

[0062] In one feasible implementation, the resource configuration information further includes:

[0063] The configuration information of the second RO resource set, and the association information between each SSB and the RO resources in the second RO resource set; wherein the second RO resource set includes multiple RO resources, and the positions of the first RO resource set and the second RO resource set are different in the time domain and / or frequency domain.

[0064] In one feasible implementation, the association information between each SSB and the RO resources in the second RO resource set includes:

[0065] The number of SSBs associated with each RO resource in the second RO resource set and / or the SSB association period; wherein the SSB association period includes at least one PRACH period.

[0066] In one feasible implementation, when the third random access preamble sent by the UE on the third RO resource in the second RO resource set is received, the target SSB associated with the third RO resource is determined according to the association information between each SSB and the RO resource in the second RO resource set, and a random access response message is sent to the UE in the direction corresponding to the target SSB associated with the third RO resource.

[0067] Thirdly, this application provides a random access device for use in a UE, the device comprising:

[0068] The receiving module is used to receive resource configuration information, which includes configuration information of multiple SSB groups, configuration information of a first RO resource set, and association information between each SSB group and the RO resources in the first RO resource set; wherein each SSB group includes at least one SSB, and the first RO resource set includes multiple RO resources.

[0069] The determination module is used to determine the target SSB group that covers the current location of the UE in each SSB group, and to determine the first RO resource associated with the target SSB group according to the association information, and to determine the first random access preamble corresponding to the target SSB group.

[0070] The sending module is used to send the first random access preamble to the network device on the first RO resource.

[0071] Fourthly, this application provides a random access device for use in a network device, the device comprising:

[0072] The sending module is used to send resource configuration information to the UE. The resource configuration information includes configuration information of multiple SSB groups, configuration information of a first RO resource set, and association information between each SSB group and the RO resources in the first RO resource set. Each SSB group includes at least one SSB, and the first RO resource set includes multiple RO resources.

[0073] The response module is configured to, when receiving the first random access preamble sent by the UE on the first RO resource in the first RO resource set, determine the target SSB group associated with the first RO resource based on the association information, and send a random access response message to the UE in the direction corresponding to each SSB in the target SSB group.

[0074] Fifthly, this application provides a user equipment, including: at least one processor and a memory;

[0075] The memory stores computer-executed instructions;

[0076] The at least one processor executes computer execution instructions stored in the memory, causing the at least one processor to perform the random access method as provided in the first aspect.

[0077] Sixthly, this application provides a network device, including: at least one processor and a memory;

[0078] The memory stores computer-executed instructions;

[0079] The at least one processor executes computer execution instructions stored in the memory, causing the at least one processor to perform the random access method as provided in the second aspect.

[0080] In a seventh aspect, this application provides a computer-readable storage medium storing computer-executable instructions, which, when executed by a processor, implement the random access method provided in the first aspect.

[0081] Alternatively, when the processor executes the computer execution instructions, it may implement the random access method provided in the second aspect.

[0082] Eighthly, this application provides a computer program product, including a computer program, which, when executed by a processor, implements the random access method provided in the first aspect, or implements the random access method provided in the second aspect.

[0083] The random access method and device provided in this application embodiment involve a UE receiving resource configuration information sent by a network device in advance. This resource configuration information includes configuration information of multiple SSB groups, configuration information of a first RO resource set, and association information between each SSB group and the RO resources in the first RO resource set. During random access, a target SSB group covering the UE's current location is determined among each SSB group. Based on the aforementioned association information, the first RO resource associated with the target SSB group and a first random access preamble are determined, and the first random access preamble is sent to the network device on the first RO resource. After receiving the first random access preamble sent by the UE on the first RO resource, the network device can determine the target SSB group associated with the first RO resource based on the aforementioned association information, and send a random access response message to the UE in the direction corresponding to each SSB in the target SSB group, thereby effectively improving the reliability of random access response message transmission. Attached Figure Description

[0084] Figure 1 This application provides a schematic diagram of the architecture of a wireless communication system.

[0085] Figure 2 This is a signaling diagram illustrating a random access procedure provided in an embodiment of this application;

[0086] Figure 3 The timing diagram for UE sending Msg1 and receiving Msg2 in an NTN scenario;

[0087] Figure 4 This is a schematic diagram of an RO configuration provided in the embodiments of this application. Figure 1 ;

[0088] Figure 5 This is a schematic diagram of an RO configuration provided in the embodiments of this application. Figure 2 ;

[0089] Figure 6 This is a flowchart illustrating a random access method provided in an embodiment of this application;

[0090] Figure 7 This is a schematic diagram of an RO configuration provided in the embodiments of this application. Figure 3 ;

[0091] Figure 8 This is a schematic diagram of an RO configuration provided in the embodiments of this application. Figure 4 ;

[0092] Figure 9 A schematic diagram of an RO configuration provided in this application embodiment. Figure 5 ;

[0093] Figure 10 This is a flowchart illustrating another random access method provided in the embodiments of this application;

[0094] Figure 11 This is a schematic diagram of the program modules of a random access device provided in the embodiments of this application;

[0095] Figure 12 This is a schematic diagram of the program modules of another random access device provided in the embodiments of this application;

[0096] Figure 13 This is a schematic diagram of the hardware structure of an electronic device provided in an embodiment of this application. Detailed Implementation

[0097] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, 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 some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0098] The embodiments of this application can be applied to various communication systems, such as: Advanced Long Term Evolution (LTE-A) systems, New Radio (NR) systems, evolution systems of NR systems, LTE-based access to unlicensed spectrum (LTE-U) systems, NR-based access to unlicensed spectrum (NR-U) systems, Universal Mobile Telecommunication System (UMTS), Non-terrestrial networks (NTN) systems, next-generation communication systems, or other communication systems, etc.

[0099] Reference Figure 1 , Figure 1 This is a schematic diagram of the architecture of a wireless communication system provided in an embodiment of this application. The wireless communication system provided in this embodiment includes a UE101 and a network device 102.

[0100] Optionally, UE101 can refer to various forms of user equipment, access terminals, mobile stations (MS), and mobile devices. It can also be a PDA, a handheld device with wireless communication capabilities, a computing device or other processing device connected to a wireless modem, an in-vehicle device, a wearable device, a terminal device in a future 5G network, or a terminal device in a future evolved Public Land Mobile Network (PLMN), etc. This application embodiment is not limited in this respect, as long as the UE101 can communicate wirelessly with the network device 102.

[0101] Optionally, network device 102, also known as public mobile communication network device, is the interface device for UE101 to access the Internet. It is also a form of radio station, referring to a radio transceiver station that transmits information with UE101 within a certain radio coverage area. This includes base stations (BS), also called base station equipment, which is a device deployed in a radio access network (RAN) to provide wireless communication functions. For example, in 4G networks, devices providing base station functions include evolved NodeBs (eNBs), in 5G NR, gNBs, and further evolved NodeBs (ng-eNBs). In this embodiment, network device 102 also includes devices that provide base station functions in future new communication systems.

[0102] In this application embodiment, the one-way communication link from the access network to the UE is defined as the downlink, the data transmitted on the downlink is called downlink data, and the transmission direction of the downlink data is called the downlink direction; while the one-way communication link from the UE to the access network is defined as the uplink, the data transmitted on the uplink is called uplink data, and the transmission direction of the uplink data is called the uplink direction.

[0103] When a UE accesses the network, it needs to initiate random access to obtain uplink synchronization. (Refer to...) Figure 2 , Figure 2 This is a signaling diagram illustrating a random access procedure provided in an embodiment of this application. In some embodiments, the random access procedure includes:

[0104] The UE completes downlink synchronization by reading the Master Information Block (MIB) and System Information Block Type 1 (SIB1).

[0105] By reading SIB1, the UE determines the resources used to send a random access preamble (Msg1) to the network device to indicate its intention to access the network device.

[0106] If the network device correctly receives Msg1, it will send a random access response message (Msg2) scrambled with the Random Access-Radio Network Temporary Identity (RA-RNTI) to the UE.

[0107] After sending Msg1, the UE can use RA-RNTI to monitor Msg2 from the network device to descramble the message, i.e., the UE receives Msg2 within the random access response window.

[0108] Reference Figure 3 , Figure 3 This is a timing diagram for the UE sending Msg1 and receiving Msg2 in an NTN scenario.

[0109] RA-RNTI is calculated using the time and frequency resources of the Random Access Channel Occasion (RO). Msg2 may contain time advance (TA), temporary cell radio network temporary identifier (TC-RNTI), power adjustment, and resource indications for UE to transmit Mgs3. Then, the UE sends its identity and initial access establishment (Msg3) to the network device (i.e., sends scheduling transmission information) through the uplink scheduling indication in Msg2.

[0110] Finally, the network device can notify the UE of the completion of the initial access procedure via Msg4; otherwise, the UE can determine that the initial access procedure has failed. If the UE receives a conflict resolution message, it considers the conflict resolution successful and the random access procedure successful. If it does not receive scheduling from the base station within a certain period of time, it considers the conflict resolution to have failed.

[0111] In some implementations, the UE can obtain the relevant configuration of the RO through SIB messages, including the period size of the RO, the number of ROs in the time domain within a Physical Random Access Channel (PRACH) period, the number of ROs multiplexed in frequency (msg1-FDM), and the number of SSBs associated with each RO (ssb-perRACH-Occasion), etc.

[0112] In existing communication protocols, one SSB can correspond to one or more RO resources, and one RO resource can also correspond to one or more SSBs. The mapping rule between SSBs and RO resources is: the SSB is first mapped to the frequency-domain multiplexed RO resource, and then mapped to the time-domain multiplexed RO resource.

[0113] Reference Figure 4 , Figure 4 A schematic diagram of an RO configuration provided in this application embodiment. Figure 1 .

[0114] exist Figure 4 In this context, the number of SSBs is 16; ssb-perRACH-Occasion is 2; and msg1-FDM is 2.

[0115] Reference Figure 5 , Figure 5 A schematic diagram of an RO configuration provided in this application embodiment. Figure 2 .

[0116] exist Figure 5 In this context, the number of SSBs is 4; ssb-perRACH-Occasion = 1 / 2; msg1-FDM = 2.

[0117] With the further evolution of 5G technology, the need for enhanced uplink coverage in various communication scenarios (such as satellite communication) is becoming increasingly urgent, especially for coverage enhancement during random access procedures, including both uplink and downlink channels. Generally, the most direct method for enhancing coverage is retransmission. However, for random access procedures, if retransmission of the random access response message is to be used, the existing random access response window needs to be extended. In satellite communication, due to the rapid movement of the satellite, the UE will switch beams during the random access response window, making it difficult to guarantee reliable transmission of the random access response message in this situation.

[0118] To address the aforementioned technical problems, this application provides a random access method. The UE can pre-receive resource configuration information sent by a network device. This resource configuration information includes association information between each SSB group and RO resources in a first RO resource set. During random access, a target SSB group covering the UE's current location is determined. Based on the aforementioned association information, the first RO resource associated with the target SSB group and a first random access preamble are determined, and the first random access preamble is sent to the network device on the first RO resource. After receiving the first random access preamble on the first RO resource, the network device can determine the target SSB group associated with the first RO resource based on the aforementioned association information, and send a random access response message to the UE in the direction corresponding to each SSB within the target SSB group. This effectively improves the reliability of random access response message transmission. Detailed embodiments are described below.

[0119] Reference Figure 6 , Figure 6 This is a flowchart illustrating a random access method provided in an embodiment of this application.

[0120] In some embodiments, the random access method can be applied to the UE. Optionally, the random access method described above can be executed by the UE, or by a chip or specific module in the UE.

[0121] The above-mentioned random access methods include:

[0122] S601. Receive resource configuration information, which includes configuration information of multiple SSB groups, configuration information of a first RO resource set, and association information between each SSB group and the RO resources in the first RO resource set.

[0123] Each SSB group includes at least one SSB, and the first RO resource set includes multiple RO resources.

[0124] In some embodiments, a network device can configure multiple SSB groups via higher-layer signaling (e.g., system information), with each SSB group corresponding to an index number. For example, a network device can configure four SSB groups with index numbers of SSB group 0, SSB group 1, SSB group 2, and SSB group 3, respectively.

[0125] In some embodiments, an SSB group contains one or more SSBs, and different SSB groups may contain the same or different numbers of SSBs.

[0126] In some embodiments, the UE determines SSB group information by receiving higher-layer signaling (e.g., system information) sent by the network device. Optionally, the network device can configure the actual SSB group index information sent via higher-layer signaling. If the actual SSB group index information is not configured, all SSB groups are assumed to be the actual SSB groups sent by default.

[0127] In some embodiments, a RO resource can be associated with M SSB groups; where, for example, the value of M can be 1 / 2, 1 / 4, 1, 2, etc., and is configured by the network device. An SSB group association period includes one or more PRACH periods, and within an SSB group association period, each SSB group (the actual SSB group sent) can be associated with the RO resource for one round.

[0128] S602. Determine the target SSB group covering the current location of the UE in each SSB group, and determine the first RO resource associated with the target SSB group and the first random access preamble corresponding to the target SSB group based on the above association information.

[0129] In some embodiments, when the UE sends Msg1, it can cover the target SSB group of the UE's current location from each SSB group, and then determine the first RO and the first random access preamble corresponding to the target SSB group based on the association information between each SSB group and the RO resources in the first RO resource set.

[0130] S603. Send a first random access preamble to the network device on the first RO resource mentioned above.

[0131] In some embodiments, after receiving the first random access preamble on the first RO resource, the network device can determine the target SSB group corresponding to the first RO resource based on the association information between each SSB group and the RO resources in the first RO resource set, and then send a random access response message in the SSB direction within the target SSB group.

[0132] The random access method provided in this application embodiment allows the UE to receive resource configuration information sent by the network device, including configuration information of multiple SSB groups, configuration information of the first random access channel timing RO resource set, and association information between each SSB group and the RO resources in the first RO resource set. During random access, a target SSB group covering the UE's current location is determined, and based on the aforementioned association information, the first RO resource associated with the target SSB group and the first random access preamble are determined. The first random access preamble is then sent to the network device on the first RO resource. After receiving the first random access preamble on the first RO resource, the network device can determine the target SSB group associated with the first RO resource based on the aforementioned association information, and send a random access response message to the UE in the direction corresponding to each SSB within the target SSB group. This effectively improves the reliability of the random access response message transmission.

[0133] Based on the content described in the above embodiments, in some embodiments of this application, the above-mentioned association information includes the number of SSB groups associated with each RO resource in the first RO resource set and / or the SSB group association period; wherein, an SSB group association period includes at least one PRACH period.

[0134] When the UE performs SSB group and RO resource mapping, it determines the index information corresponding to each SSB group based on the configuration information of each SSB group, and determines the association relationship between each SSB group and the RO resources in the first RO resource set according to the index information corresponding to each SSB group, the number of SSB groups associated with each RO resource in the first RO resource set, and the SSB group association period.

[0135] In one feasible implementation, within an SSB group association cycle, all SSB groups actually transmitted by the network device must complete one round of mapping with RO resources. That is, within an SSB group association cycle, all SSB groups actually transmitted by the network device will be associated with one RO resource. The management rules for SSB groups and RO resources are as follows:

[0136] First, sort the PRACH resources (i.e., RO and preamble) in the following order:

[0137] 1. For a RO resource, sort it in ascending order according to the index of the random preamble, that is, sort the PRACH transmission resource groups in a RO resource from small to large according to the index of the preamble.

[0138] Second: Sort the RO resources reused in the frequency domain in ascending order according to the frequency domain resource index.

[0139] 3. Sort the RO resources reused in the time domain in ascending order according to the time domain resource index.

[0140] After sorting the PRACH resources, they are mapped to the PRACH resources in ascending order of SSB group index. For example, suppose one RO resource is associated with one SSB group, and two RO resources are reused in the frequency domain. The network device is configured with four SSBs, namely {SSB1, SSB2, SSB3, SSB4}, and six SSB groups, namely {SSB group 1 (SSB1, SSB2), SSB group 2 (SSB2, SSB3), SSB group 3 (SSB2, SSB4), SSB group 4 (SSB3, SSB4), SSB group 5 (SSB1, SSB4), SSB group 6 (SSB1, SSB3)}. Assuming the network device actually sends the following SSB groups: {SSB group 1 (SSB1, SSB2), SSB group 2 (SSB2, SSB3), SSB group 3 (SSB2, SSB4); SSB group 4 (SSB3, SSB4), SSB group 5 (SSB1, SSB4)}, the mapping result can be referenced. Figure 7 , Figure 7 A schematic diagram of an RO configuration provided in this application embodiment. Figure 3 .

[0141] In some embodiments, when the UE transmits Msg1, it can determine the target SSB group covering the UE's current location from among the various SSB groups based on preset ephemeris information, satellite beam layout information, and the UE's current GNSS positioning information. Then, based on the mapping relationship between SSB groups and PRACH resources, it determines the first RO and the first random access preamble corresponding to the target SSB group.

[0142] In some embodiments, the range of preamble indexes corresponding to the target SSB group can be determined based on the above-mentioned association information. Then, a target preamble index can be selected within the range of the preamble indexes, and the preamble corresponding to the target preamble index can be used as the first random access preamble corresponding to the target SSB group.

[0143] Optionally, the UE may randomly select a preamble corresponding to a preamble index within the target preamble sequence index range corresponding to the target SSB group as the first random access preamble.

[0144] Based on the first RO resource and the first random access preamble received, the network device can determine the target SSB group and send a random access response message in the direction of the SSB corresponding to the target SSB group. Therefore, after the UE sends the first random access preamble to the network device on the first RO resource, it can receive the random access response messages sent by the network device in the directions corresponding to each SSB within the target SSB group.

[0145] For example, with Figure 7 For example, assuming the UE determines the target SSB group as SSB group 1 based on GNSS positioning information, satellite ephemeris information, and satellite beam layout information, the UE can arbitrarily select a random access preamble on RO1 and send a random access request message to the network device. After receiving the random access request message sent by the UE on RO1, the network device can determine that the target SSB group is SSB group 1, and then the network device needs to send a random access response message in the direction corresponding to SSB1 and SSB2.

[0146] In some embodiments, if a RO resource is associated with multiple SSB groups, then different SSB groups will correspond to different random access preamble index ranges. For example, if a RO resource corresponds to 64 random access preamble indices, and assuming that a RO resource is associated with SSB group 1 and SSB group 2, then SSB group 1 can correspond to random access preamble indices 0 to 31, and SSB group 2 can correspond to random access preamble indices 32 to 63.

[0147] Based on the content described in the above embodiments, in some embodiments of this application, the network device can configure multiple SSB groups through higher-layer signaling (e.g., system information), and each SSB group corresponds to an index number. For example, the network device can configure four SSB groups: SSB group 0, SSB group 1, SSB group 2, and SSB group 3.

[0148] In some embodiments, an SSB group contains one or more SSBs, and different SSB groups may contain the same or different numbers of SSBs.

[0149] In some embodiments, the UE determines SSB group information by receiving higher-layer signaling (e.g., system information) sent by the network device. Optionally, the network device can configure the actual SSB group index information to be sent via higher-layer signaling (if no actual SSB group index information is configured, all SSB groups are assumed to be the actual SSB groups).

[0150] In some embodiments, for an SSB configured by a network device, the network device may also configure a specific subset of random access preambles to associate with the SSB.

[0151] In some embodiments, the resource configuration information above also includes the association relationship between each SSB and the RO resources in the first RO resource set; a first preamble index range and a second preamble index range, wherein the preamble corresponding to the first preamble index range is used to associate with the SSB group, and the preamble corresponding to the second preamble index range is used to associate with the SSB.

[0152] For example, one RO resource corresponds to 64 random access preambles (index numbers 0, 1, 2, ..., 62, 63). Network devices can configure the preamble index numbers from 0 to 31 to be associated with the SSB group through higher-layer signaling, and the remaining preambles (i.e., index numbers 32 to 63) to be associated with the SSB.

[0153] In some embodiments, an RO can be associated with M SSB groups; where, for example, the value of M can be 1 / 2, 1 / 4, 1, 2, 3, etc., and is configured by the network device. An SSB group association period includes one or more PRACH periods, and within an SSB group association period, each SSB group (the actual SSB group sent) can be associated with the RO for one round.

[0154] When determining the first random access preamble corresponding to the target SSB group, the UE can determine the first sub-preamble index range corresponding to the target SSB group within the first preamble index range based on the association information between each SSB group and the RO resources in the first RO resource set. Then, the UE selects a target preamble index within the first sub-preamble index range and uses the preamble corresponding to the selected target preamble index as the first random access preamble corresponding to the target SSB group.

[0155] Similarly, when determining the second random access preamble corresponding to the target SSB, the UE can determine the second sub-preamble index range corresponding to the target SSB within the second preamble index range based on the association information between each SSB and the RO resources in the first RO resource set. Then, it can select a target preamble index within the second sub-preamble index range and use the preamble corresponding to the selected target preamble index as the second random access preamble corresponding to the target SSB.

[0156] For example, assuming the first preamble index range is 0-31 and the second preamble index range is 32-63, and assuming a RO resource is associated with 2 SSB groups and 2 SSBs, then these 2 SSB groups equally share the preamble in the first preamble index range. For example, the sub-preamble index range corresponding to SSB group 1 is 0-15, and the sub-preamble index range corresponding to SSB group 2 is 16-31. The above 2 SSBs equally share the preamble in the second preamble index range. For example, the sub-preamble index range corresponding to SSB1 is 32-47, and the sub-preamble index range corresponding to SSB2 is 48-63.

[0157] In some embodiments, the association information between each SSB and the RO resources in the first RO resource set includes: the number of SSBs associated with each RO resource in the first RO resource set and / or the SSB association period; wherein, the SSB association period includes at least one PRACH period.

[0158] The UE can determine the index information corresponding to each SSB based on the configuration information of each SSB, and determine the association relationship between each SSB and the RO resources in the first RO resource set according to the index information corresponding to each SSB, the number of SSBs associated with each RO resource in the first RO resource set, and the SSB association period.

[0159] For example, suppose an RO is associated with an SSB group and an SSB, and two RO resources are reused in the frequency domain. Each RO corresponds to 64 random access preambles (index numbers 0-63). Preamble index numbers 0-31 are used to associate with SSBs, and preamble index numbers 32-63 are used to associate with SSB groups. The network device is configured with 4 SSBs, namely {SSB1, SSB2, SSB3, SSB4}; and 6 SSB groups, namely {SSB group 1 (SSB1, SSB2), SSB group 2 (SSB2, SSB3), SSB group 3 (SSB2, SSB4), SSB group 4 (SSB3, SSB4), SSB group 5 (SSB1, SSB4), SSB group 6 (SSB1, SSB3)}. Assuming the network device actually sends the following SSB groups: {SSB group 1 (SSB1, SSB2), SSB group 2 (SSB2, SSB3), SSB group 3 (SSB2, SSB4); SSB group 4 (SSB3, SSB4), SSB group 5 (SSB1, SSB4)}, the mapping result can be referenced. Figure 8 , Figure 8 A schematic diagram of an RO configuration provided in this application embodiment. Figure 4 .

[0160] In some embodiments, when the UE transmits Msg1, it determines the target SSB and target SSB group that cover its current location based on GNSS location information, satellite ephemeris information and satellite beam layout information.

[0161] In some embodiments, the UE can also determine the coverage time of a beam corresponding to an SSB based on GNSS location information, satellite ephemeris information, and satellite beam layout information. The UE can determine whether to use the PRACH resources corresponding to the target SSB or the PRACH resources corresponding to the target SSB group to send the random access request message based on the coverage time of the target SSB corresponding to its current location.

[0162] In some embodiments, when the coverage time of the target SSB is less than a duration threshold, the UE selects the PRACH resource corresponding to the target SSB group to send the random access request message; otherwise, it uses the PRACH resource corresponding to the target SSB to send the random access request message.

[0163] The aforementioned duration threshold can be determined autonomously by the UE based on the size of the random access response window, or it can be configured by the network device through higher-layer signaling.

[0164] In some embodiments, when the UE determines to use the PRACH resource corresponding to the target SSB group to send a random access request message, it determines the first RO and the first random access preamble corresponding to the target SSB group based on the association between the SSB group and the PRACH resource. The network device can determine the target SSB group based on the first RO resource and the first random access preamble received from the first random access preamble, and send a random access response message in the direction corresponding to the SSB contained in the target SSB group.

[0165] For example, refer to Figure 8 Assuming the UE determines the target SSB group as SSB group 1 based on GNSS location information, satellite ephemeris information, and satellite beam layout information, the UE selects a random access preamble from the random access preamble subset corresponding to SSB group 1 on RO1 and sends a random access request message to the network. After the network device receives the random access request message sent by the UE on RO1, it can determine that the target SSB group is SSB group 1. Then, the network device needs to send a random access response message in the direction corresponding to SSB1 and SSB2.

[0166] When the UE determines to use the PRACH resource corresponding to the target SSB to send the random access request message, it determines the second RO resource and the second random access preamble corresponding to the target SSB based on the association between the SSB and the PRACH resource. The network device, based on the second RO resource and the second random access preamble received from the second random access preamble, determines the target SSB and sends a random access response message in the direction of the target SSB.

[0167] The UE can receive random access response messages sent by network devices in the direction corresponding to the target SSB.

[0168] For example, refer to Figure 8 Assuming the UE determines the target SSB as SSB1 based on GNSS location information, satellite ephemeris information, and satellite beam layout information, the UE selects a random access preamble from the random access preamble subset corresponding to SSB1 on RO1 and sends a random access request message to the network. After receiving the random access request message sent by the UE on RO1, the network device can determine that the target SSB is SSB1, and then the network device needs to send a random access response message in the direction corresponding to SSB1.

[0169] Based on the descriptions in the above embodiments, in some embodiments of this application, for the SSB group configured by the network device, the network device will also configure specific RO resources for association with the SSB. That is, the network device will configure two sets of RO resource sets, which are orthogonal and do not overlap. One set of RO resource sets is used for association with the SSB, and the other set of RO resource sets is used for association with the SSB group.

[0170] In some embodiments, the resource configuration information may further include configuration information of the second RO resource set and association information between each SSB and the RO resources in the second RO resource set; wherein the second RO resource set includes multiple RO resources, and the first RO resource set and the second RO resource set are located in different positions in the time domain and / or frequency domain.

[0171] For example, suppose a network device is configured with two sets of RO resources, namely a first RO resource set and a second RO resource set; wherein the second RO resource set is used to associate with an SSB, and the first RO resource set is used to associate with an SSB group. The two sets of RO resources have the same time domain location but different frequency domain locations (or they can have the same frequency domain location but different time domain locations, or both frequency domain locations and time domain locations can be different).

[0172] In some embodiments, the association information between each of the SSBs and the RO resources in the second RO resource set includes the number of SSBs associated with each RO resource in the second RO resource set and the SSB association period; wherein, the SSB association period includes at least one PRACH period.

[0173] In some embodiments, the UE can determine the index information corresponding to each SSB based on the configuration information of each SSB, and determine the association relationship between each SSB and the RO resources in the second RO resource set according to the index information corresponding to each SSB, the number of SSBs associated with each RO resource in the second RO resource set, and / or the SSB association period.

[0174] In some embodiments, assuming the network device is configured with 4 SSBs, namely {SSB1, SSB2, SSB3, SSB4}; and 6 SSB groups, namely {SSB group 1 (SSB1, SSB2); SSB group 2 (SSB2, SSB3); SSB group 3 (SSB2, SSB4); SSB group 4 (SSB3, SSB4); SSB group 5 (SSB1, SSB4); SSB group 6 (SSB1, SSB3)}; and the network device actually sends the following SSB groups: {SSB group 1 (SSB1, SSB2); SSB group 2 (SSB2, SSB3); SSB group 3 (SSB2, SSB4); SSB group 4 (SSB3, SSB4); SSB group 5 (SSB1, SSB4)}. The mapping result can be referred to... Figure 9 , Figure 9 A schematic diagram of an RO configuration provided in this application embodiment. Figure 5 .

[0175] In some embodiments, when the UE transmits Msg1, it determines the target SSB and target SSB group that cover its current location based on GNSS location information, satellite ephemeris information and satellite beamforming information.

[0176] The UE can determine the coverage time of a beam corresponding to an SSB based on GNSS location information, ephemeris information, and satellite beam layout information. The UE can then determine whether to use the PRACH resources corresponding to the target SSB or the PRACH resources corresponding to the target SSB group to send the random access request message based on the coverage time of the target SSB corresponding to its current location.

[0177] In some embodiments, when the coverage time of the target SSB is less than a threshold, the UE selects the PRACH resource corresponding to the target SSB group to send the random access request message; otherwise, it uses the PRACH resource corresponding to the target SSB to send the random access request message.

[0178] The threshold for the time period can be determined autonomously by the UE based on the size of the random access response window, or it can be configured by the network device through higher-layer signaling.

[0179] In some embodiments, when the UE determines to use the PRACH resource corresponding to the target SSB group to send a random access request message, it determines the target RO and the target preamble sequence index range corresponding to the target SSB group based on the association between the SSB group and the PRACH resource (the UE can randomly select a sequence corresponding to a preamble index as the target preamble within the target preamble sequence index range corresponding to the target SSB group). The network device determines the target SSB group based on the RO of the received Msg1 and the value range corresponding to the random preamble index, and sends a random access response message in the direction corresponding to each SSB in the target SSB group.

[0180] For example, assuming the UE determines the target SSB group as SSB group 1 based on GNSS location information, satellite ephemeris information, and satellite beam layout information, the UE selects a random access preamble on RO1 in the first RO resource set and sends a random access request message to the network device. After receiving the random access request message sent by the UE on RO1 in the first RO resource set, the network device can determine that the target SSB group is SSB group 1. Then, the network device needs to send a random access response message in the direction corresponding to SSB1 and SSB2.

[0181] When the UE determines to use the PRACH resource corresponding to the target SSB to send the random access request message, it determines the third RO and the third random access preamble corresponding to the target SSB based on the association between the SSB and the PRACH resource. The network device determines the target SSB based on the third RO and the third random access preamble of the received Msg1, and sends a random access response message in the direction of the target SSB.

[0182] For example, assuming the UE determines the target SSB as SSB1 based on GNSS location information, satellite ephemeris information, and satellite beam layout information, the UE selects a random access preamble from the random access preamble subset corresponding to SSB1 on RO1 in the second RO resource set and sends a random access request message to the network. After the network device receives the random access request message sent by the UE on RO1 in the second RO resource set, it can determine that the target SSB is SSB1. Then the network device needs to send a random access response message in the direction corresponding to SSB1.

[0183] The random access method provided in this application allows the network device to configure multiple SSB groups through higher-layer signaling, with one RO (Redirect Resource) associated with several SSB groups. Additionally, the preamble can be divided into two subsets: one subset is associated with an SSB group, and the other subset is associated with an SSB. Alternatively, the network device can configure two sets of RO resources: one set is associated with an SSB group, and the other set is associated with an SSB. This effectively improves the reliability of random access response message transmission.

[0184] Based on the content described in the above embodiments, this application also provides a random access method applied to a network device. (Refer to...) Figure 10 , Figure 10 This is a flowchart illustrating another random access method provided in the embodiments of this application.

[0185] Optionally, the above-mentioned random access method can be executed by a network device, or by a chip or specific module in the network device.

[0186] The above-mentioned random access methods include:

[0187] S1001. Send resource configuration information to the UE. The resource configuration information includes configuration information of multiple SSB groups, configuration information of the first RO resource set, and association information between each SSB group and the RO resources in the first RO resource set.

[0188] Each SSB group includes at least one SSB, and the first RO resource set includes multiple RO resources.

[0189] S1002. When the first random access preamble sent by the UE on the first RO resource in the first RO resource set is received, the target SSB group associated with the first RO resource is determined according to the above association information, and a random access response message is sent to the UE in the direction corresponding to each SSB in the target SSB group.

[0190] In one feasible implementation, the aforementioned association information includes the number of SSB groups associated with each RO resource in the first RO resource set and / or the SSB group association period; wherein, the SSB group association period includes at least one PRACH period.

[0191] In one feasible implementation, the above resource configuration information also includes:

[0192] The association information between each SSB and the RO resources in the first RO resource set;

[0193] A first preamble index range and a second preamble index range, wherein the preamble corresponding to the first preamble index range is used to associate with the SSB group, and the preamble corresponding to the second preamble index range is used to associate with the SSB.

[0194] In one feasible implementation, the association information between each SSB and the RO resources in the first RO resource set includes:

[0195] The number of SSBs associated with each RO resource in the first RO resource set and / or the SSB association period; wherein, the SSB association period includes at least one PRACH period.

[0196] In one feasible implementation, when a second random access preamble sent by the UE on a second RO resource in the first RO resource set is received, the target SSB associated with the first RO resource is determined based on the association information between each SSB and the RO resource in the first RO resource set, and a random access response message is sent to the UE in the direction corresponding to the target SSB.

[0197] In one feasible implementation, the above resource configuration information also includes:

[0198] The configuration information of the second RO resource set, and the association information between each SSB and the RO resources in the second RO resource set; wherein, the second RO resource set includes multiple RO resources, and the positions of the first RO resource set and the second RO resource set are different in the time domain and / or frequency domain.

[0199] In one feasible implementation, the association information between each SSB and the RO resources in the second RO resource set includes:

[0200] The number of SSBs associated with each RO resource in the second RO resource set and / or the SSB association period; wherein, the SSB association period includes at least one PRACH period.

[0201] In one feasible implementation, when a third random access preamble sent by the UE on a third RO resource in the second RO resource set is received, the target SSB associated with the third RO resource is determined based on the association information between each SSB and the RO resource in the second RO resource set, and a random access response message is sent to the UE in the direction corresponding to the target SSB associated with the third RO resource.

[0202] The random access method provided in this application embodiment allows the network device to determine the target SSB group associated with the first RO resource based on the association relationship between each SSB group and the RO resource in the first RO resource set after receiving the first random access preamble on the first RO resource. Then, the network device sends a random access response message to the UE in the direction corresponding to each SSB in the target SSB group, thereby effectively improving the reliability of the random access response message transmission.

[0203] Based on the content described in the above embodiments, this application also provides a random access device applied to a user equipment. (Refer to...) Figure 11 , Figure 11 This is a schematic diagram of the program modules of a random access device 11 provided in an embodiment of this application. The random access device 11 includes:

[0204] The receiving module 1101 is used to receive resource configuration information, which includes configuration information of multiple SSB groups, configuration information of a first RO resource set, and association information between each SSB group and the RO resources in the first RO resource set; wherein each SSB group includes at least one SSB, and the first RO resource set includes multiple RO resources.

[0205] The determining module 1102 is used to determine the target SSB group covering the current location of the UE in each SSB group, and to determine the first RO resource associated with the target SSB group according to the association information, and to determine the first random access preamble corresponding to the target SSB group.

[0206] The sending module 1103 is used to send the first random access preamble to the network device on the first RO resource.

[0207] In some embodiments, the association information includes the number of SSB groups associated with each RO resource in the first RO resource set and / or the SSB group association period; wherein the SSB group association period includes at least one PRACH period.

[0208] In some embodiments, the determining module 1102 is configured to:

[0209] Based on the preset ephemeris information, satellite beam layout information, and the UE's current GNSS positioning information, the target SSB group covering the UE's current location is determined in each SSB group.

[0210] In some embodiments, the determining module 1102 is configured to:

[0211] Based on the associated information, determine the preamble index range corresponding to the target SSB group;

[0212] Select a target preamble index within the range of the preamble indexes, and use the preamble corresponding to the target preamble index as the first random access preamble corresponding to the target SSB group.

[0213] In some embodiments, a receiving module is further included, for:

[0214] The network device receives random access response messages in the direction corresponding to each SSB within the target SSB group.

[0215] In some embodiments, the resource configuration information further includes:

[0216] The association information between each SSB and the RO resources in the first RO resource set;

[0217] A first preamble index range and a second preamble index range, wherein the preamble corresponding to the first preamble index range is used to associate with the SSB group, and the preamble corresponding to the second preamble index range is used to associate with the SSB.

[0218] In some embodiments, the association information between each SSB and the RO resources in the first RO resource set includes:

[0219] The number of SSBs associated with each RO resource in the first RO resource set and / or the SSB association period; wherein the SSB association period includes at least one PRACH period.

[0220] In some embodiments, the determining module 1102 is further configured to:

[0221] Based on the preset ephemeris information, satellite beam layout information, and the UE's current GNSS positioning information, the target SSB that covers the UE's current location is determined among the various SSBs.

[0222] In some embodiments, the sending module 1103 is further configured to:

[0223] Determine the coverage time of the target SSB;

[0224] When the coverage time is less than a preset duration threshold, the first random access preamble is sent to the network device on the first RO resource;

[0225] When the coverage time is greater than or equal to the preset duration threshold, the second RO resource associated with the target SSB and the second random access preamble corresponding to the target SSB are determined based on the association information between each SSB and the RO resource in the first RO resource set, and the second random access preamble is sent to the network device on the second RO resource.

[0226] In some embodiments, the receiving module is further configured to:

[0227] Receive the random access response message sent by the network device in the direction corresponding to the target SSB.

[0228] In some embodiments, the resource configuration information further includes:

[0229] The configuration information of the second RO resource set, and the association information between each SSB and the RO resources in the second RO resource set;

[0230] The second RO resource set includes multiple RO resources, and the first RO resource set and the second RO resource set are located in different positions in the time domain and / or frequency domain.

[0231] In some embodiments, the association information between each SSB and the RO resources in the second RO resource set includes:

[0232] The number of SSBs associated with each RO resource in the second RO resource set and / or the SSB association period; wherein the SSB association period includes at least one PRACH period.

[0233] In some embodiments, the determining module 1102 is further configured to:

[0234] Based on the preset ephemeris information, satellite beam layout information, and the UE's current GNSS positioning information, the target SSB that covers the UE's current location is determined among the various SSBs.

[0235] In some embodiments, the sending module 1103 is further configured to:

[0236] Determine the coverage time of the target SSB;

[0237] When the coverage time is less than a preset duration threshold, the first random access preamble is sent to the network device on the first RO resource;

[0238] When the coverage time is greater than or equal to the preset duration threshold, the third RO resource associated with the target SSB and the third random access preamble corresponding to the target SSB are determined according to the association information between each SSB and the RO resource in the second RO resource set, and the third random access preamble is sent to the network device on the third RO resource; wherein, the third RO resource belongs to the second RO resource set.

[0239] In some embodiments, the receiving module is further configured to:

[0240] Receive the random access response message sent by the network device in the direction corresponding to the target SSB.

[0241] It should be noted that the specific content executed by the receiving module 1101, determining module 1102 and sending module 1103 in this embodiment is related to the various steps executed by the UE in the random access method described in the above embodiments. For details, please refer to the content described in the above embodiments, which will not be repeated here.

[0242] This application provides a random access device 11. During random access, it determines a target SSB group covering the UE's current location. Based on the association information between each SSB group and RO resources in a first RO resource set, it determines the first RO resource associated with the target SSB group and a first random access preamble. The device then sends the first random access preamble to the network device on the first RO resource. After receiving the first random access preamble on the first RO resource, the network device can determine the target SSB group associated with the first RO resource based on the association information. It then sends a random access response message to the UE in the direction corresponding to each SSB within the target SSB group, thereby effectively improving the reliability of the random access response message transmission.

[0243] Based on the content described in the above embodiments, this application also provides a random access device applied to a user equipment. (Refer to...) Figure 12 , Figure 12 This is a schematic diagram of the program modules of another random access device provided in this application embodiment. The random access device 12 includes:

[0244] The sending module 1201 is used to send resource configuration information to the UE. The resource configuration information includes configuration information of multiple SSB groups, configuration information of a first RO resource set, and association information between each SSB group and the RO resources in the first RO resource set. Each SSB group includes at least one SSB, and the first RO resource set includes multiple RO resources.

[0245] The response module 1202 is configured to, when receiving the first random access preamble sent by the UE on the first RO resource in the first RO resource set, determine the target SSB group associated with the first RO resource according to the association information, and send a random access response message to the UE in the direction corresponding to each SSB in the target SSB group.

[0246] It should be noted that the specific content executed by the sending module 1201 and the response module 1202 in this embodiment is related to the various steps executed by the network device in the random access method described in the above embodiments. For details, please refer to the content described in the above embodiments, which will not be repeated here.

[0247] The random access device 12 provided in this application embodiment, after receiving the first random access preamble on the first RO resource, can determine the target SSB group associated with the first RO resource based on the association relationship between each SSB group and the RO resource in the first RO resource set, and send a random access response message to the UE in the direction corresponding to each SSB in the target SSB group, thereby effectively improving the reliability of random access response message transmission.

[0248] Optionally, the aforementioned random access device 11 and random access device 12 may be chips or chip modules, etc.

[0249] Regarding the modules included in the random access device 11 and random access device 12 described in the above embodiments, they may be software modules, hardware modules, or a combination of both. For example, for various devices and products applied to or integrated into a chip, each module can be implemented using hardware methods such as circuits, or at least some modules can be implemented using software programs that run on a processor integrated within the chip, while the remaining (if any) modules can be implemented using hardware methods such as circuits; for various devices and products applied to or integrated into a chip module, each module can be implemented using hardware methods such as circuits, and different modules can be located in the same component (e.g., chip, circuit module, etc.) or different components of the chip module, or at least some modules can be implemented using software programs that run on a processor integrated within the chip module, while the remaining (if any) modules can be implemented using hardware methods such as circuits; for various devices and products applied to or integrated into a terminal, each module can be implemented using hardware methods such as circuits, and different modules can be located in the same component (e.g., chip, circuit module, etc.) or different components within the terminal, or at least some modules can be implemented using software programs that run on a processor integrated within the terminal, while the remaining (if any) modules can be implemented using hardware methods such as circuits.

[0250] Furthermore, based on the content described in the above embodiments, this application also provides a user equipment, which includes at least one processor and a memory; wherein, the memory stores computer execution instructions; the at least one processor executes the computer execution instructions stored in the memory to implement the steps executed on the user equipment side as described in the above embodiments, which will not be repeated here.

[0251] Furthermore, based on the content described in the above embodiments, this application also provides a network device, which includes at least one processor and a memory; wherein the memory stores computer execution instructions; the at least one processor executes the computer execution instructions stored in the memory to implement the steps executed on the network device side as described in the above embodiments, which will not be repeated here.

[0252] To better understand the embodiments of this application, please refer to... Figure 13 , Figure 13 This is a schematic diagram of the hardware structure of an electronic device provided in an embodiment of this application. The electronic device can be either the user equipment described above or the network device described above.

[0253] like Figure 13 As shown, the electronic device 130 of this embodiment includes: a processor 1301 and a memory 1302; wherein:

[0254] Memory 1302 is used to store computer-executed instructions;

[0255] The processor 1301 is used to execute computer execution instructions stored in the memory to implement the various steps performed by the user equipment in the above embodiments, as detailed in the relevant descriptions in the foregoing method embodiments.

[0256] Alternatively, processor 1301 is configured to execute computer execution instructions stored in memory to implement the various steps performed by the network device in the above embodiments, as detailed in the relevant descriptions in the foregoing method embodiments.

[0257] Alternatively, the memory 1302 can be either standalone or integrated with the processor 1301.

[0258] When the memory 1302 is set up independently, the device also includes a bus 1303 for connecting the memory 1302 and the processor 1301.

[0259] Furthermore, based on the content described in the above embodiments, this application also provides a computer-readable storage medium storing computer-executable instructions, which, when executed by a processor, implement the steps executed on the user equipment side as described in the above embodiments.

[0260] Furthermore, based on the content described in the above embodiments, this application also provides a computer-readable storage medium storing computer-executable instructions, which, when executed by a processor, implement the steps executed on the network device side as described in the above embodiments.

[0261] Furthermore, based on the content described in the above embodiments, this application also provides a computer program product, including a computer program, which, when executed by a processor, implements the steps executed on the user device side as described in the above embodiments; or implements the steps executed on the network device side as described in the above embodiments.

[0262] It should be understood that, in the several embodiments provided in this application, the disclosed devices and methods can be implemented in other ways. For example, the device embodiments described above are merely illustrative; for instance, the division of modules is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple modules may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be indirect coupling or communication connection through some interfaces, devices, or modules, and may be electrical, mechanical, or other forms.

[0263] The modules described as separate components may or may not be physically separate. The components shown as modules may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs.

[0264] Furthermore, the functional modules in the various embodiments of this application can be integrated into one processing unit, or each module can exist physically separately, or two or more modules can be integrated into one unit. The unit composed of the above modules can be implemented in hardware or in the form of hardware plus software functional units.

[0265] The integrated modules implemented as software functional modules described above can be stored in a computer-readable storage medium. These software functional modules, stored in a storage medium, include several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) or processor to execute some steps of the methods described in the various embodiments of this application.

[0266] It should be understood that the aforementioned processor can be a Central Processing Unit (CPU), or other general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), etc. A general-purpose processor can be a microprocessor or any conventional processor. The steps of the method disclosed in the application can be directly manifested as execution by a hardware processor, or execution by a combination of hardware and software modules within the processor.

[0267] The memory may include high-speed RAM, and may also include non-volatile storage (NVM), such as at least one disk storage device, and may also be a USB flash drive, external hard drive, read-only memory, disk or optical disc, etc.

[0268] The bus can be an Industry Standard Architecture (ISA) bus, a Peripheral Component Interconnect (PCI) bus, or an Extended Industry Standard Architecture (EISA) bus, etc. Buses can be categorized as address buses, data buses, control buses, etc. For ease of illustration, the buses shown in the accompanying drawings are not limited to a single bus or a single type of bus.

[0269] The aforementioned storage medium can be implemented from any type of volatile or non-volatile storage device or a combination thereof, such as static random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic storage, flash memory, magnetic disk, or optical disk. The storage medium can be any available medium accessible to general-purpose or special-purpose computers.

[0270] An exemplary storage medium is coupled to a processor, enabling the processor to read information from and write information to the storage medium. Alternatively, the storage medium can be an integral part of the processor. Both the processor and the storage medium can reside in an Application Specific Integrated Circuit (ASIC). Alternatively, the processor and storage medium can exist as discrete components in an electronic device or host device.

[0271] Those skilled in the art will understand that all or part of the steps of the above-described method embodiments can be implemented by hardware related to program instructions. The aforementioned program can be stored in a computer-readable storage medium. When executed, the program performs the steps of the above-described method embodiments; and the aforementioned storage medium includes various media capable of storing program code, such as ROM, RAM, magnetic disks, or optical disks.

[0272] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A random access method, characterized in that, When applied in a user equipment (UE), the method includes: The system receives resource configuration information, which includes configuration information for multiple Synchronization Signal Block (SSB) groups, configuration information for a first Random Access Channel (RO) resource set, and association information between each SSB group and the RO resources in the first RO resource set; wherein each SSB group includes at least one SSB, and the first RO resource set includes multiple RO resources. Based on the preset ephemeris information, satellite beam layout information and the UE's current GNSS positioning information, the target SSB group covering the UE's current location is determined in each SSB group, and based on the association information, the first RO resource associated with the target SSB group is determined, and the first random access preamble corresponding to the target SSB group is determined. Send the first random access preamble to the network device on the first RO resource.

2. The method according to claim 1, characterized in that, The association information includes the number of SSB groups associated with each RO resource in the first RO resource set and / or the SSB group association period; wherein, the SSB group association period includes at least one Physical Random Access Channel (PRACH) period.

3. The method according to claim 1, characterized in that, Determining the first random access preamble corresponding to the target SSB group includes: Based on the associated information, determine the preamble index range corresponding to the target SSB group; Select a target preamble index within the range of the preamble indexes, and use the preamble corresponding to the target preamble index as the first random access preamble corresponding to the target SSB group.

4. The method according to any one of claims 1 to 3, characterized in that, After sending the first random access preamble to the network device on the first RO resource, the method further includes: The network device receives random access response messages in the direction corresponding to each SSB within the target SSB group.

5. The method according to claim 1, characterized in that, The resource configuration information also includes: The association information between each SSB and the RO resources in the first RO resource set; A first preamble index range and a second preamble index range, wherein the preamble corresponding to the first preamble index range is used to associate with the SSB group, and the preamble corresponding to the second preamble index range is used to associate with the SSB.

6. The method according to claim 5, characterized in that, The association information between each SSB and the RO resources in the first RO resource set includes: The number of SSBs associated with each RO resource in the first RO resource set and / or the SSB association period; wherein the SSB association period includes at least one PRACH period.

7. The method according to claim 6, characterized in that, Also includes: Based on the preset ephemeris information, satellite beam layout information, and the UE's current GNSS positioning information, the target SSB that covers the UE's current location is determined among the various SSBs.

8. The method according to claim 7, characterized in that, Determining the first random access preamble corresponding to the target SSB group includes: Based on the association information between each SSB group and the RO resources in the first RO resource set, the first sub-preamble index range corresponding to the target SSB group within the first preamble index range is determined; Select a target preamble index within the range of the first sub-preamble index, and use the preamble corresponding to the selected target preamble index as the first random access preamble corresponding to the target SSB group.

9. The method according to claim 8, characterized in that, Sending the first random access preamble to the network device on the first RO resource includes: Determine the coverage time of the target SSB; When the coverage time is less than a preset duration threshold, the first random access preamble is sent to the network device on the first RO resource.

10. The method according to claim 9, characterized in that, Also includes: When the coverage time is greater than or equal to the preset duration threshold, the second RO resource associated with the target SSB and the second random access preamble corresponding to the target SSB are determined based on the association information between each SSB and the RO resource in the first RO resource set, and the second random access preamble is sent to the network device on the second RO resource.

11. The method according to claim 10, characterized in that, Determining the second random access preamble corresponding to the target SSB includes: Based on the association information between each SSB and the RO resources in the first RO resource set, the second sub-preamble index range corresponding to the target SSB within the second preamble index range is determined; Select a target preamble index within the range of the second sub-preamble index, and use the preamble corresponding to the selected target preamble index as the second random access preamble corresponding to the target SSB.

12. The method according to claim 10, characterized in that, After sending the second random access preamble to the network device on the second RO resource, the method further includes: Receive the random access response message sent by the network device in the direction corresponding to the target SSB.

13. The method according to claim 1, characterized in that, The resource configuration information also includes: Configuration information of the second RO resource set, and association information between each SSB and the RO resources in the second RO resource set; The second RO resource set includes multiple RO resources, and the first RO resource set and the second RO resource set are located in different positions in the time domain and / or frequency domain.

14. The method according to claim 13, characterized in that, The association information between each SSB and the RO resources in the second RO resource set includes: The number of SSBs associated with each RO resource in the second RO resource set and / or the SSB association period; wherein the SSB association period includes at least one PRACH period.

15. The method according to claim 13, characterized in that, Also includes: Based on the preset ephemeris information, satellite beam layout information, and the UE's current GNSS positioning information, the target SSB that covers the UE's current location is determined among the various SSBs.

16. The method according to claim 15, characterized in that, Sending the first random access preamble to the network device on the first RO resource includes: Determine the coverage time of the target SSB; When the coverage time is less than a preset duration threshold, the first random access preamble is sent to the network device on the first RO resource; When the coverage time is greater than or equal to the preset duration threshold, the third RO resource associated with the target SSB and the third random access preamble corresponding to the target SSB are determined according to the association information between each SSB and the RO resource in the second RO resource set, and the third random access preamble is sent to the network device on the third RO resource; wherein, the third RO resource belongs to the second RO resource set.

17. The method according to claim 16, characterized in that, After sending the third random access preamble to the network device on the third RO resource, the method further includes: Receive the random access response message sent by the network device in the direction corresponding to the target SSB.

18. The method according to claim 9 or 16, characterized in that, Also includes: The preset duration threshold is determined based on the random access response window; Alternatively, the preset duration threshold can be determined based on the resource configuration information.

19. A random access method, characterized in that, When applied in network devices, the method includes: Resource configuration information is sent to the UE. The resource configuration information includes configuration information of multiple SSB groups, configuration information of a first RO resource set, and association information between each SSB group and the RO resources in the first RO resource set. Each SSB group includes at least one SSB, and the first RO resource set includes multiple RO resources. When the first random access preamble sent by the UE on the first RO resource in the first RO resource set is received, the target SSB group associated with the first RO resource is determined according to the association information, and a random access response message is sent to the UE in the direction corresponding to each SSB in the target SSB group.

20. The method according to claim 19, characterized in that, The association information includes the number of SSB groups associated with each RO resource in the first RO resource set and / or the SSB group association period; wherein, the SSB group association period includes at least one PRACH period.

21. The method according to claim 19, characterized in that, The resource configuration information also includes: The association information between each SSB and the RO resources in the first RO resource set; A first preamble index range and a second preamble index range, wherein the preamble corresponding to the first preamble index range is used to associate with the SSB group, and the preamble corresponding to the second preamble index range is used to associate with the SSB.

22. The method according to claim 21, characterized in that, The association information between each SSB and the RO resources in the first RO resource set includes: The number of SSBs associated with each RO resource in the first RO resource set and / or the SSB association period; wherein the SSB association period includes at least one PRACH period.

23. The method according to claim 21, characterized in that, When the second random access preamble sent by the UE on the second RO resource in the first RO resource set is received, the target SSB associated with the second RO resource is determined according to the association information between each SSB and the RO resource in the first RO resource set, and a random access response message is sent to the UE in the direction corresponding to the target SSB.

24. The method according to claim 19, characterized in that, The resource configuration information also includes: The configuration information of the second RO resource set, and the association information between each SSB and the RO resources in the second RO resource set; wherein the second RO resource set includes multiple RO resources, and the positions of the first RO resource set and the second RO resource set are different in the time domain and / or frequency domain.

25. The method according to claim 24, characterized in that, The association information between each SSB and the RO resources in the second RO resource set includes: The number of SSBs associated with each RO resource in the second RO resource set and / or the SSB association period; wherein the SSB association period includes at least one PRACH period.

26. The method according to claim 24, characterized in that, When the third random access preamble sent by the UE on the third RO resource in the second RO resource set is received, the target SSB associated with the third RO resource is determined according to the association information between each SSB and the RO resource in the second RO resource set, and a random access response message is sent to the UE in the direction corresponding to the target SSB associated with the third RO resource.

27. A random access device, characterized in that, The device, used in a UE, includes: The receiving module is used to receive resource configuration information, which includes configuration information of multiple SSB groups, configuration information of a first RO resource set, and association information between each SSB group and the RO resources in the first RO resource set; wherein each SSB group includes at least one SSB, and the first RO resource set includes multiple RO resources. The determination module is used to determine the target SSB group covering the current location of the UE in each SSB group according to the preset ephemeris information, satellite beam layout information and the current GNSS positioning information of the UE, and to determine the first RO resource associated with the target SSB group according to the association information, and to determine the first random access preamble corresponding to the target SSB group. The sending module is used to send the first random access preamble to the network device on the first RO resource.

28. A random access device, characterized in that, The device, used in network equipment, includes: The sending module is used to send resource configuration information to the UE. The resource configuration information includes configuration information of multiple SSB groups, configuration information of a first RO resource set, and association information between each SSB group and the RO resources in the first RO resource set. Each SSB group includes at least one SSB, and the first RO resource set includes multiple RO resources. The response module is configured to, when receiving the first random access preamble sent by the UE on the first RO resource in the first RO resource set, determine the target SSB group associated with the first RO resource based on the association information, and send a random access response message to the UE in the direction corresponding to each SSB in the target SSB group.

29. A user equipment, characterized in that, include: At least one processor and memory; The memory stores computer-executed instructions; The at least one processor executes computer execution instructions stored in the memory, causing the at least one processor to perform the random access method as described in any one of claims 1 to 18.

30. A network device, characterized in that, include: At least one processor and memory; The memory stores computer-executed instructions; The at least one processor executes computer execution instructions stored in the memory, causing the at least one processor to perform the random access method as described in any one of claims 19 to 26.

31. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores computer-executable instructions, which, when executed by a processor, implement the random access method as described in any one of claims 1 to 18; Alternatively, when the processor executes the computer execution instructions, it implements the random access method as described in any one of claims 19 to 26.

32. A computer program product, comprising a computer program, characterized in that, When the computer program is executed by a processor, it implements the random access method as described in any one of claims 1 to 18, or the random access method as described in any one of claims 19 to 26.

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