Random access resource selection, configuration method, apparatus, terminal and network side device

Abstract

The application discloses a random access resource selection and configuration method, device, terminal and network side equipment, and belongs to the technical field of communication. The random access resource selection method is executed by a terminal and includes the following steps: receiving configuration information sent by a network side equipment, wherein the configuration information is used for indicating the association relationship between the random access resource configured by the network side equipment and a first characteristic; and selecting a random access resource according to the configuration information and a second characteristic supported by the terminal. The random access resource includes at least one of the following: a downlink reference signal, a carrier, a bandwidth part, a random access type, a random access preamble, a random access preamble group and a random access occasion. The technical scheme of the embodiment of the application can ensure that the UE selects a suitable random access resource from multiple random access resources.

Description

Technical Field

[0001] This application relates to the field of communication technology, specifically to a random access resource selection and configuration method, apparatus, terminal, and network-side equipment. Background Technology

[0002] In existing New Radio (NR) systems, the network side allocates independent random access resources to NR terminals that support small data transmission / reduced capabilities / coverage enhancement, as well as terminals whose network configuration information includes access network slice allocation information. Currently, there is no content on random access resource selection in related technologies. In order to ensure that the terminal can select a suitable random access resource from multiple random access resources and to ensure that the network side device accurately identifies the characteristics and service requirements supported by the terminal, a method for random access resource selection needs to be designed. Summary of the Invention

[0003] This application provides a random access resource selection and configuration method, apparatus, terminal, and network-side device, which can ensure that the terminal selects a suitable random access resource from multiple random access resources.

[0004] In a first aspect, embodiments of this application provide a random access resource selection method, executed by a terminal, comprising:

[0005] Receive configuration information sent by the network-side device, wherein the configuration information is used to indicate the association between the random access resources configured by the network-side device and the first characteristic;

[0006] Based on the configuration information and the second feature supported by the terminal, a random access resource is selected;

[0007] The random access resources include at least one of the following:

[0008] Downlink reference signal, carrier, bandwidth portion, random access type, random access preamble, random access preamble group, and random access timing.

[0009] Secondly, embodiments of this application provide a random access resource configuration method, executed by a network-side device, comprising:

[0010] Send configuration information to the terminal, the configuration information being used to indicate the association between the random access resources configured by the network-side device and the first characteristic;

[0011] The random access resources include at least one of the following:

[0012] Downlink reference signal, carrier, bandwidth portion, random access type, random access preamble, random access preamble group, and random access timing.

[0013] Thirdly, embodiments of this application provide a random access resource selection device, applied to a terminal, comprising:

[0014] A receiving module is used to receive configuration information sent by a network-side device, wherein the configuration information is used to indicate the association between the random access resources configured by the network-side device and the first characteristic;

[0015] The selection module is used to select random access resources based on the configuration information and the second feature supported by the terminal;

[0016] The random access resources include at least one of the following:

[0017] Downlink reference signal, carrier, bandwidth portion, random access type, random access preamble, random access preamble group, and random access timing.

[0018] Fourthly, embodiments of this application provide a random access resource configuration apparatus, applied to a network-side device, comprising:

[0019] A sending module is used to send configuration information to the terminal, wherein the configuration information is used to indicate the association between the random access resources configured by the network-side device and the first characteristic;

[0020] The random access resources include at least one of the following:

[0021] Downlink reference signal, carrier, bandwidth portion, random access type, random access preamble, random access preamble group, and random access timing.

[0022] Fifthly, a terminal is provided, the terminal including a processor, a memory, and a program or instructions stored in the memory and executable on the processor, wherein the program or instructions, when executed by the processor, implement the steps of the method described in the first aspect.

[0023] In a sixth aspect, a terminal is provided, including a processor and a communication interface, wherein the processor is configured to receive configuration information sent by a network-side device, the configuration information being used to indicate the association between random access resources configured by the network-side device and a first feature; and to select random access resources according to the configuration information and a second feature supported by the terminal;

[0024] The random access resources include at least one of the following:

[0025] Downlink reference signal, carrier, bandwidth portion, random access type, random access preamble, random access preamble group, and random access timing.

[0026] In a seventh aspect, a network-side device is provided, the network-side device including a processor, a memory, and a program or instructions stored in the memory and executable on the processor, wherein the program or instructions, when executed by the processor, implement the steps of the method as described in the second aspect.

[0027] Eighthly, a network-side device is provided, including a processor and a communication interface, wherein the communication interface is used to send configuration information to a terminal, and the configuration information is used to indicate the association between random access resources configured by the network-side device and a first characteristic;

[0028] The random access resources include at least one of the following:

[0029] Downlink reference signal, carrier, bandwidth portion, random access type, random access preamble, random access preamble group, and random access timing.

[0030] A ninth aspect provides a readable storage medium on which a program or instructions are stored, which, when executed by a processor, implement the steps of the method as described in the first or second aspect.

[0031] In a tenth aspect, a chip is provided, the chip including a processor and a communication interface, the communication interface being coupled to the processor, the processor being configured to run programs or instructions to implement the method as described in the first or second aspect.

[0032] Eleventhly, a computer program / program product is provided, the computer program / program product being stored in a non-volatile storage medium, the program / program product being executed by at least one processor to implement the steps of the method as described in the first or second aspect.

[0033] In this embodiment, the terminal receives configuration information sent by the network-side device, and selects random access resources based on the configuration information and the second feature supported by the terminal. This ensures that the terminal selects a suitable random access resource from among multiple random access resources, thereby ensuring that the network-side device accurately identifies the features and service requirements supported by the terminal. Attached Figure Description

[0034] Figure 1 A schematic diagram showing a wireless communication system;

[0035] Figure 2 This diagram illustrates the random access resource selection process.

[0036] Figure 3 This diagram illustrates the Preamble partitioning method.

[0037] Figure 4This is a flowchart illustrating the random access resource selection method executed by a terminal in an embodiment of this application.

[0038] Figure 5 This is a flowchart illustrating the random access resource configuration method executed by a network-side device in an embodiment of this application.

[0039] Figure 6 This is a schematic diagram illustrating the structure of a random access resource selection device applied to a terminal according to an embodiment of this application;

[0040] Figure 7 This is a schematic diagram illustrating the structure of a random access resource configuration device applied to a network-side device according to an embodiment of this application;

[0041] Figure 8 This is a schematic diagram of the structure of the communication device according to an embodiment of this application;

[0042] Figure 9 A schematic diagram illustrating the composition of a terminal according to an embodiment of this application;

[0043] Figure 10 This is a schematic diagram illustrating the composition of the network-side device in an embodiment of this application. Detailed Implementation

[0044] The technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application are within the scope of protection of this application.

[0045] The terms "first," "second," etc., used in the specification and claims of this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such terms can be used interchangeably where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first" and "second" are generally of the same class, not limited in number; for example, a first object can be one or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0046] It is worth noting that the technologies described in this application are not limited to Long Term Evolution (LTE) / LTE-Advanced (LTE-A) systems, but can also be used in other wireless communication systems, such as Code Division Multiple Access (CDMA), Time Division Multiple Access (TDMA), Frequency Division Multiple Access (FDMA), Orthogonal Frequency Division Multiple Access (OFDMA), Single-carrier Frequency-Division Multiple Access (SC-FDMA), and other systems. The terms "system" and "network" in this application are often used interchangeably, and the described technologies can be used not only in the systems and radio technologies mentioned above, but also in other systems and radio technologies. The following description describes New Radio (NR) systems for illustrative purposes, and NR terminology is used in most of the following description; however, these technologies can also be applied to applications beyond NR systems, such as 6th Generation (6G) communication systems.

[0047] Figure 1This diagram illustrates a block diagram of a wireless communication system applicable to embodiments of this application. The wireless communication system includes a terminal 11 and a network-side device 12. The terminal 11 can also be referred to as a terminal device or user equipment (UE). The terminal 11 can be a mobile phone, tablet computer, laptop computer, personal digital assistant (PDA), handheld computer, netbook, ultra-mobile personal computer (UMPC), mobile internet device (MID), wearable device, vehicle-mounted device (VUE), pedestrian terminal (PUE), etc. Wearable devices include smartwatches, wristbands, headphones, glasses, etc. It should be noted that this application does not limit the specific type of terminal 11. Network-side equipment 12 can be a base station or a core network. The base station can be referred to as a node B, evolved node B, access point, base transceiver station (BTS), radio base station, radio transceiver, basic service set (BSS), extended service set (ESS), B node, evolved B node (eNB), home B node, home evolved B node, WLAN access point, WiFi node, transmitting and receiving point (TRP), or any other suitable term in the field, as long as the same technical effect is achieved. The base station is not limited to specific technical terms. It should be noted that in this application embodiment, only the base station in the NR system is used as an example, but the specific type of base station is not limited. The core network equipment can be a location management device, such as a location management function (LMF, E-SLMC), etc.

[0048] Figure 2 This diagram illustrates the random access resource selection process. Figure 3 This diagram illustrates the preamble partitioning method for random access, as shown below. Figure 2 As shown, random access resource selection includes the following steps:

[0049] Step 1: The UE selects an uplink carrier based on the downlink path loss reference and the reference signal receiving power (RSRP) threshold.

[0050] Step 2: If random access resources are available on the active uplink bandwidth part (BWP) of the selected uplink carrier, the UE performs random access on the currently active uplink BWP. Otherwise, the UE switches to the initial uplink BWP.

[0051] Step 3: The UE selects the type of random access (4-step RA or 2-step RA) based on the downlink path loss reference and RSRP threshold;

[0052] Step 4: The UE selects the synchronization signal block (SSB) based on the measured L1-RSRP and RSRP threshold.

[0053] Step 5: The UE selects a preamble from the preambles associated with the selected SSB, based on the selected random access type;

[0054] Step 6: The UE randomly selects an RO from the random access opportunities (ROs) associated with the selected SSB, based on the selected random access type.

[0055] If the UE selects the 2-step RA type and the 2-step RA attempt fails N times, the UE will change the 2-step RA type to the 4-step RA type to complete the fallback. Then, the UE will reselect resources based on the 4-step RA type.

[0056] In NR systems, the network side allocates independent random access resources to UEs that support small data transmission (SDT), reduced capability NR devices (RedCap), coverage enhancement (CovEnh), and radio access networks slicing (RAN) identifiers configured by the network. To ensure that the UE can select a suitable random access resource from among multiple random access resources and that the network side devices can accurately identify the features and service requirements supported by the UE, a new method for selecting random access resources needs to be designed.

[0057] This application provides a method for random access resource selection, executed by a terminal, such as... Figure 4 As shown, the method includes:

[0058] Step 101: Receive configuration information sent by the network-side device, wherein the configuration information is used to indicate the association between the random access resources configured by the network-side device and the first feature;

[0059] Step 102: Select random access resources based on the configuration information and the second feature supported by the terminal;

[0060] The random access resources may include at least one of the following:

[0061] Downlink reference signal, carrier (including uplink and downlink carrier), bandwidth (including uplink and downlink bandwidth), random access type, random access preamble, random access preamble group, and random access timing.

[0062] In this embodiment, the terminal receives configuration information sent by the network-side device, and selects random access resources based on the configuration information and the second feature supported by the terminal. This ensures that the terminal selects a suitable random access resource from among multiple random access resources, thereby ensuring that the network-side device accurately identifies the features and service requirements supported by the terminal.

[0063] In some embodiments, the downlink reference signal may include any of the following:

[0064] Measurement symbols for the community

[0065] The measurement subframe of the cell;

[0066] Measurement time slots for the cell;

[0067] Frequency measurement symbols;

[0068] Frequency measurement subframe;

[0069] Frequency measurement time slot.

[0070] In some embodiments, the configuration information may include at least one of the following:

[0071] The downlink reference signal associated with the random access resource corresponding to the first characteristic;

[0072] The random access resource allocation information corresponding to the first characteristic includes at least one of time location information, frequency location information, code domain information, and power domain information;

[0073] The enabling information for the first characteristic;

[0074] Priority information corresponding to the first characteristic;

[0075] Measurement thresholds used for random access resource selection;

[0076] Configuration parameters used in the random access procedure;

[0077] The measurement threshold or the configuration parameter is related to the first characteristic.

[0078] In some embodiments, the first feature includes at least one of Small Data Transmission Technique (SDT), Reduced Capability NR Terminal (RedCap), Coverage Enhancement (CovEnh), Access Network Slicing (RAN), Two-Step Random Access (2-step RA), and Four-Step Random Access (4-step RA). For example, it can be any combination of at least two of RAN slicing, RedCap, SDT, and CovEnh, as well as a combination with 2-step or 4-step RA (that is, at least two of RAN slicing, RedCap, SDT, and CovEnh can be selected, and one of 2-step and 4-step RA can be selected, and then these two parts together form a combination). In one optional specific example, the first feature can be of the RAN slicing–RedCap–4step RA type.

[0079] In some embodiments, the step of selecting random access resources based on the configuration information and a second feature supported by the terminal includes:

[0080] Based on the configuration information, the second feature supported by the terminal, and the selection rules for random access resources, a random access resource is selected, wherein the selection rules for random access resources include at least one of the following:

[0081] The target carrier is determined according to the first carrier selection rule, and the target bandwidth portion is determined according to the second selection rule of the target carrier and the bandwidth portion.

[0082] The target bandwidth portion is determined according to the second selection rule of the bandwidth portion, and the target random access type is determined according to the target bandwidth portion and the third selection rule of the random access type.

[0083] The target downlink reference signal is determined according to the fourth selection rule of the downlink reference signal;

[0084] The target random access preamble group is determined according to the fifth selection rule of the random access preamble group;

[0085] The target random access type is determined according to the third selection rule of the random access type, the downlink reference signal is determined according to the fourth selection rule of the downlink reference signal, the target random access preamble group is determined according to the fifth selection rule of the random access preamble group, and the target random access preamble is determined according to the sixth selection rule of the target random access type, the target downlink reference signal, the target random access preamble group and the random access preamble.

[0086] The target random access type is determined according to the third selection rule of the random access type, the downlink reference signal is determined according to the fourth selection rule of the downlink reference signal, and the target random access timing is determined according to the seventh selection rule of the target random access type, the target downlink reference signal, and the random access timing.

[0087] In some embodiments, if the network side configures multiple (i.e., at least two) carriers or BWPs with random access resources or common message resources for the serving cell, the UE can determine the carrier or BWP for the random access procedure using a first selection rule, which may include at least one of the following:

[0088] The target carrier for the random access procedure is selected based on the measurement results. For example, it can be selected based on the L1-RSRP result corresponding to the DL pathloss reference, choosing the carrier with the best measurement result (e.g., the carrier with the largest L1-RSRP corresponding to the DL pathloss reference). Alternatively, it can be selected based on the measurement results and the configured threshold value, such as choosing the carrier corresponding to the largest or smallest measurement result, or choosing the carrier whose measurement result is greater than or equal to the threshold value, or choosing the carrier whose measurement result is less than the threshold value. If multiple carriers have measurement results that satisfy the threshold value (i.e., greater than or equal to the threshold value, or less than the threshold value), then one carrier is randomly selected from all carriers whose corresponding measurement results are greater than or equal to or less than the threshold value.

[0089] Randomly select one carrier from multiple carriers with random access resources configured on the network side device as the target carrier;

[0090] The target carrier for the random access procedure is selected based on first information, which is contained in a paging message, a random access response message, or a system message to indicate the target carrier for the random access procedure. For example, the first information may be included in downlink control information (DCI), media access control signaling (MAC CE), or physical downlink shared channel (PDSCH). The first information may include the index value of the carrier.

[0091] The target carrier for the random access procedure is selected according to the load balancing principle. In one optional implementation, the UE generates a random number and determines the uplink carrier based on the generated random number and a threshold value. For example, assuming that the network side is configured with 3 carriers (e.g., the first carrier, the second carrier, and the third carrier) and 2 threshold values ​​(e.g., 0.5 and 0.7), the UE generates a random number (e.g., 0.3) in the interval (0, 1], and then the UE selects the first carrier as the target carrier.

[0092] The target carrier is selected based on at least one of the following: the second feature supported by the terminal, the RAN slicing identifier allocation information configured in the network, the motivation for triggering the random access procedure, and the priority information corresponding to the first feature. The second or third feature may include at least one of SDT, RedCap, CovEnh, RAN slicing, 2-step RA, and 4-step RA. Any two of the first feature, the second feature, and the third feature may be the same or different. The motivation for triggering the random access procedure may be due to SDT or due to access performed by the RedCap UE. In this embodiment, the priority information corresponding to the first feature may be any order of priority among SDT, RedCap, CovEnh, and RAN slicing. For example, in one optional implementation, the priority information corresponding to the first feature can be Slice higher than RedCap, RedCap higher than SDT, and SDT higher than ConEnh; of course, in other optional implementations, it can also be Slice higher than SDT, SDT higher than RedCap, and RedCap higher than ConEnh; or it can be RedCap higher than Slice, Slice higher than SDT, and SDT higher than ConEnh; or an equal priority arrangement. This application does not specifically limit the priority information corresponding to the first feature.

[0093] Select the carrier with the nearest available random access resource as the target carrier.

[0094] In some embodiments, after determining the uplink carrier, if there are multiple uplink BWPs with random access resources on the selected carrier, the UE can determine the uplink BWP for the random access procedure using a second selection rule, the second selection rule including at least one of the following:

[0095] Based on at least one of the following: the second feature supported by the terminal, the RAN slicing identifier allocation information configured in the network, the motivation for triggering the random access procedure, and the priority information corresponding to the first feature, the bandwidth portion of the random access resource that supports the third feature is selected as the target bandwidth portion. The motivation for triggering the random access procedure may be random access performed by RedCap UE.

[0096] The target bandwidth portion used for the random access procedure is selected according to the load balancing principle. In one optional implementation, the UE generates a random number and determines the uplink BWP based on the generated random number and a threshold value. For example, assuming the network side is configured with 3 carriers (e.g., first uplink BWP, second uplink BWP, and third uplink BWP) and 2 threshold values ​​(e.g., 0.4 and 0.8), the UE generates a random number (e.g., 0.5) in the interval (0, 1], and then the UE selects the second uplink BWP as the target carrier.

[0097] Randomly select one bandwidth portion from multiple bandwidth portions with random access resources configured on the network-side device as the target bandwidth portion;

[0098] The target bandwidth portion for the random access procedure is selected based on first information, which is contained in a paging message, a random access response message, or a system message, to indicate the target bandwidth portion for the random access procedure.

[0099] The second or third characteristic includes at least one of SDT, RedCap, CovEnh, RAN slicing, 2-step RA, and 4-step RA, wherein any two of the first characteristic, the second characteristic, and the third characteristic are the same or different.

[0100] In some embodiments, after determining the uplink BWP, if there are multiple random access resources on the selected uplink BWP for random access procedures of different purposes or feature types, such as SDT-based 4-step RACH or RedCap-based 4-step RACH, the UE can determine the random access type for the random access procedure using a third selection rule, wherein the third selection rule includes:

[0101] The target random access type for the random access procedure is selected based on at least one of the following: a second feature supported by the terminal, RAN slicing identifier allocation information configured in the network, motivation for triggering the random access procedure, measurement results, and the configuration information. The second feature includes at least one of SDT, RedCap, CovEnh and RAN slicing, 2-step RA, and 4-step RA. The first feature may be the same as or different from the second feature.

[0102] In some embodiments, after the random access type is determined, the UE can determine the DL reference signal for the random access procedure using a fourth selection rule, wherein the fourth selection rule includes at least one of the following:

[0103] The target downlink reference signal for the random access procedure is selected based on the measurement results and the configured measurement threshold, such as by selecting based on the DL pathloss reference or L1-RSRP results and the configured threshold.

[0104] Select a target downlink reference signal from all downlink reference signals associated with the configured random access resources.

[0105] In some embodiments, the fifth selection rule includes:

[0106] If the first condition is met, the first random access preamble group is selected as the target random access preamble group;

[0107] The first condition includes at least one of the following:

[0108] The network side configures the first random access preamble group corresponding to the target random access type;

[0109] The amount of data to be transmitted by the terminal is greater than or equal to the first threshold.

[0110] The downlink path loss measurement value of the terminal is less than the second threshold;

[0111] If the first condition is not met, a second random access preamble group is selected as the target random access preamble group, and the second random access preamble group is different from the first random access preamble group.

[0112] In some embodiments, the sixth selection rule includes:

[0113] A target random access preamble is randomly selected from the target random access preamble group corresponding to the target random access type with equal probability. The target random access preamble and the target downlink reference signal are correlated.

[0114] In some embodiments, the seventh selection rule includes:

[0115] The nearest available random access opportunity is randomly selected from the consecutive random access opportunities corresponding to the target random access type with equal probability as the target random access opportunity.

[0116] In some embodiments, after the step of selecting random access resources, the method further includes:

[0117] Perform the random access procedure;

[0118] During the random access process, if the random access type selected by the terminal includes RAN slicing or SDT (e.g., RAN slicing–RedCap–4step RA) and a preset fallback condition is met, a random access type fallback is performed, and the target random access type is reset (e.g., from RAN slicing–RedCap–4step RA to RedCap–4step RA). Alternatively, in other optional embodiments, the random access type selected by the terminal may be SDT–RedCap–4step RA, and if a preset fallback condition is met, a random access type fallback is performed, and the target random access type is reset, i.e., from SDT–RedCap–4step RA to RedCap–4step RA. Furthermore, in other embodiments of this application, the process also includes cases where various possible random access types selected by the terminal are fallbacked, and the target random access type is reset, if preset fallback conditions are met.

[0119] Based on the target random access type, select random access resources again.

[0120] In one specific embodiment, assuming the UE simultaneously supports Slice, RedCap, SDT, and CovEnh features, the random access resource selection method includes the following steps:

[0121] Step 0: Configure the association information between random access resources and UE-supported features on the network side. This association information includes:

[0122] Downlink reference signals associated with random access resources, such as SSB identifiers;

[0123] Random access resource allocation information corresponding to random access type (e.g., 4-step RA), such as time location information (e.g., RO), and / or frequency location information (e.g., PRACH occasion, carrier configuration information), and / or code domain information (e.g., preamble index);

[0124] Supporting feature enabling information (e.g., the network indicates in the configuration message that the current cell supports SDT and RedCap) and / or the priority information corresponding to the feature (e.g., RedCap feature takes precedence over SDT).

[0125] Additionally, the network side can configure measurement thresholds for random access resource selection and / or configuration parameters for the random access procedure (e.g., threshold values ​​that trigger UE random access type backoff). These threshold configurations or parameters may be associated with UE-supported features (e.g., a threshold configuration for SDT, a threshold configuration for RedCap, and a threshold configuration for RedCap-SDT), wherein the "measurement" refers to any of the following:

[0126] RSRP;

[0127] RSRQ (Reference Signal Received Quality)

[0128] RSSI (Received Signal Strength Indicator)

[0129] CR (Channel Occupancy Ratio).

[0130] Step 1: The UE initiates a random access procedure, first selecting the uplink carrier;

[0131] Assuming the network configures the RAN slicing identifier allocation information for the UE as Slice 1 (the UE first selects Slice 1 for access), and assuming the network configures SDT and RedCap resources for uplink carrier 1, and configures Slice 1 resources for uplink carrier 2, then the UE selects uplink carrier 2 according to the matching of supported features (assuming the UE simultaneously supports Slice, RedCap, SDT, Slice-RedCap, Slice-SDT, RedCap-SDT, and Slice-RedCap-SDT features) and the priority information of supported features (which can be protocol-defined, such as Slice taking precedence over RedCap, and RedCap taking precedence over SDT). (The UE first determines which carrier has Slice 1 resources and uses the carrier with Slice 1 resources as the target carrier.) Furthermore, if the network side also configures an uplink carrier 3, which is also configured with Slice 1 resources, the UE can randomly select an uplink carrier from uplink carrier 2 or uplink carrier 3, or select the uplink carrier with the larger downlink path loss reference value, or select an uplink carrier based on the measured downlink reference path loss and the configured threshold value. If the threshold value corresponding to uplink carrier 2 < downlink path loss reference < threshold value corresponding to uplink carrier 3, then the UE selects uplink carrier 3 as the target uplink carrier. Furthermore, if the network side also configures an uplink carrier 4, which is also configured with Slice 1 resources (and simultaneously includes SDT resources and RedCap resources, i.e., resources corresponding to the Slice1-Redcap-SDT feature), then the UE can select uplink carrier 4. Furthermore, if the network side also configures an uplink carrier 5, which is also configured with resources of Slice 1 (including SDT resources, i.e., resources corresponding to the Slice1-SDT feature), then the UE can select uplink carrier 5.

[0132] Step 2: The UE selects the uplink BWP;

[0133] The network side may allocate a separate BWP for random access resources for RedCap UEs, which is not the initial BWP for traditional NRUE access. Assuming the network side configures Slice 1 resources and SDT resources on the initial BWP, and configures RedCap resources and SDT resources for the separate BWP, then during the random access procedure, the UE (which supports both RedCap and Slice 1 and SDT) will select the separate BWP according to the matching and priority of supported features. For example, if the protocol stipulates that the network side configures a separate BWP for RedCap UEs on the selected uplink carrier, then the RedCap UE will select the separate BWP as the uplink BWP.

[0134] Step 3: The UE determines the random access type;

[0135] On the uplink BWP selected by the UE, assuming that the network has configured corresponding random access resources (which may include 4-step / 2-step RO and / or the corresponding Preamble group / Preamble) for features such as Slice 1, Redcap, SDT, and CovEnh, and also configured corresponding random access resources for the feature RAN slicing–Redcap–SDT–CovEnh–4step RA. The UE can determine the random access type as Slice-RedCap-SDT-4step random access based on its support for RedCap, the network configuration of its RAN slicing identifier allocation information as Slice 1, and the current random access procedure being SDT-triggered. (For example, the UE first determines that the network has configured resources corresponding to RAN slicing 1. If the resources corresponding to RAN slicing 1 include resources corresponding to RedCap, then it further determines whether the resources corresponding to RedCap include resources corresponding to SDT (such as 4-step RA resources corresponding to Slice-RedCap-SDT). If so, the UE determines the target random access type as Slice-RedCap-SDT-4step RA.) If the network also configures corresponding 2-step random access resources for the Slice-RedCap-SDT feature, the UE can determine the random access type as Slice-RedCap-SDT-2step RA based on the measurement results and configuration thresholds (such as the measurement results being higher than the threshold value associated with the Slice-RedCap-SDT combined feature). Additionally, if the network only configures the corresponding 2-step random access resources for the feature combination, it is determined to be the Slice-RedCap-SDT-2step RA random access type.

[0136] Of course, in other implementations, the UE can first determine if the network has configured resources corresponding to RedCap. If the resources corresponding to RedCap include resources corresponding to RAN slicing 1, then it further determines whether the resources corresponding to RAN slicing 1 contain resources corresponding to SDT (such as 4-step RA resources corresponding to RedCap-Slice-SDT). If so, the UE determines the target random access type as RedCap-Slice-SDT-4step RA. If the network also configures corresponding 2-step random access resources for the RedCap-Slice-SDT feature, the UE can determine the RedCap-Slice-SDT-2step RA random access type based on the measurement results and configuration thresholds (e.g., the measurement results are higher than the threshold value associated with the RedCap-Slice-SDT combined feature). Alternatively, if the network only configures corresponding 2-step random access resources for the feature combination, then it determines the RedCap-Slice-SDT-2step RA random access type.

[0137] It should be noted that in this application, there is no specific limitation on the order in which the resources corresponding to each characteristic are determined. The specific order in which the resources corresponding to each characteristic are determined can be selected according to actual needs.

[0138] Furthermore, the UE can also determine the Slice-RedCap-SDT-CovEnh-4step random access type based on its support for RedCap and the network configuration information indicating that the UE belongs to slice1 and the current random access procedure is SDT-triggered, and based on the measurement results and configuration thresholds (e.g., the measurement results are lower than the threshold value associated with the Slice-RedCap-SDT-EovEnh combined feature).

[0139] Step 4: Select the downlink reference signal;

[0140] If the random access type selected by the UE includes at least the CovEnh mode (e.g., Slice-RedCap-SDT-EovEnh), one implementation is as follows: if the UE measures that at least one SSB has an L1-RSRP higher than the configured threshold, then it arbitrarily selects one SSB from at least one SSB; otherwise, the UE selects one from all downlink reference signals associated with the configured random access resources (arbitrarily or with equal probability). Another implementation is as follows: the UE selects one from all downlink reference signals associated with the configured random access resources (arbitrarily or with equal probability).

[0141] Steps 5 and 6: Select preamble and RO;

[0142] The UE randomly selects one preamble with equal probability from all preambles of the selected random access type (e.g., all preambles configured by the network on slice1 for the Slice-RedCap-SDT-4step RA access type). The UE randomly selects one RO with equal probability from all consecutive ROs of the selected random access type (e.g., all consecutive ROs configured by the network on slice1 for the Slice-RedCap-SDT-4step RA access type).

[0143] Step 7: Rollback to random access type.

[0144] If the random access type selected by the UE includes at least Slicing or SDT and the fallback conditions are met, then a random access type fallback will be performed, and random access resources will be reselected according to the fallback type. For example, the UE can fall back from the Slice-RedCap-SDT access type to Slice-RedCap. The fallback conditions can be that the random access process has not been completed after the UE has attempted N random access attempts with the Slice-RedCap-SDT access type, or that a fallback instruction has been received from the network side. Afterward, the UE will reselect random access resources according to the Slice-RedCap type, where N is a positive integer.

[0145] In cases where the network side allocates independent random access resources to UEs that support SDT, RedCap, CovEnh, and whose network configuration information includes Slicing allocation information, this embodiment ensures that the UE can select a suitable random access resource from multiple random access resources, ensuring that the network-side equipment accurately identifies the features and service requirements supported by the UE.

[0146] This application also provides a method for random access resource configuration, executed by a network-side device, such as... Figure 5 As shown, it includes:

[0147] Step 201: Send configuration information to the terminal, wherein the configuration information is used to indicate the association between the random access resources configured by the network-side device and the first feature;

[0148] The random access resources include at least one of the following:

[0149] Downlink reference signal, carrier, bandwidth portion, random access type, random access preamble, random access preamble group, and random access timing.

[0150] In some embodiments, the configuration information includes at least one of the following:

[0151] The downlink reference signal associated with the random access resource corresponding to the first characteristic;

[0152] The random access resource allocation information corresponding to the first characteristic includes at least one of time location information, frequency location information, code domain information, and power domain information;

[0153] The enabling information for the first characteristic;

[0154] Priority information corresponding to the first characteristic;

[0155] Measurement thresholds used for random access resource selection;

[0156] Configuration parameters used in the random access procedure;

[0157] The measurement threshold or the configuration parameter is related to the first characteristic.

[0158] In some embodiments, the first feature includes at least one of Small Data Transmission Technique (SDT), Reduced Capability NR Terminal (RedCap), Coverage Enhancement (CovEnh), Access Network Slicing (RAN), Two-Step Random Access (2-step RA), and Four-Step Random Access (4-step RA).

[0159] It should be noted that the random access resource selection method provided in this application embodiment can be executed by a random access resource selection device, or a module within that random access resource selection device for executing the loading random access resource selection method. This application embodiment uses the execution of the loading random access resource selection method by a random access resource selection device as an example to illustrate the random access resource selection method provided in this application embodiment.

[0160] This application provides a random access resource selection device, applied to terminal 300, such as... Figure 6 As shown, the device includes:

[0161] The receiving module 310 is used to receive configuration information sent by the network-side device, wherein the configuration information is used to indicate the association between the random access resources configured by the network-side device and the first feature;

[0162] Selection module 320 is used to select random access resources based on the configuration information and the second feature supported by the terminal;

[0163] The random access resources include at least one of the following:

[0164] Downlink reference signal, carrier, bandwidth portion, random access type, random access preamble, random access preamble group, and random access timing.

[0165] In some embodiments, the configuration information includes at least one of the following:

[0166] The downlink reference signal associated with the random access resource corresponding to the first characteristic;

[0167] The random access resource allocation information corresponding to the first characteristic includes at least one of time location information, frequency location information, code domain information, and power domain information;

[0168] The enabling information for the first characteristic;

[0169] Priority information corresponding to the first characteristic;

[0170] Measurement thresholds used for random access resource selection;

[0171] Configuration parameters used in the random access procedure;

[0172] The measurement threshold or the configuration parameter is related to the first characteristic.

[0173] In some embodiments, the first feature includes at least one of Small Data Transmission Technique (SDT), Reduced Capability NR Terminal (RedCap), Coverage Enhancement (CovEnh), Access Network Slicing (RAN), Two-Step Random Access (2-step RA), and Four-Step Random Access (4-step RA).

[0174] In some embodiments, the selection module is specifically used to select a random access resource based on the configuration information and the second feature supported by the terminal, and according to the selection rules for the random access resource, wherein the selection rules for the random access resource include at least one of the following:

[0175] The target carrier is determined according to the first carrier selection rule, and the target bandwidth portion is determined according to the second selection rule of the target carrier and the bandwidth portion.

[0176] The target bandwidth portion is determined according to the second selection rule of the bandwidth portion, and the target random access type is determined according to the target bandwidth portion and the third selection rule of the random access type.

[0177] The target downlink reference signal is determined according to the fourth selection rule of the downlink reference signal;

[0178] The target random access preamble group is determined according to the fifth selection rule of the random access preamble group;

[0179] The target random access type is determined according to the third selection rule of the random access type, the downlink reference signal is determined according to the fourth selection rule of the downlink reference signal, the target random access preamble group is determined according to the fifth selection rule of the random access preamble group, and the target random access preamble is determined according to the sixth selection rule of the target random access type, the target downlink reference signal, the target random access preamble group and the random access preamble.

[0180] The target random access type is determined according to the third selection rule of the random access type, the downlink reference signal is determined according to the fourth selection rule of the downlink reference signal, and the target random access timing is determined according to the seventh selection rule of the target random access type, the target downlink reference signal, and the random access timing.

[0181] In some embodiments, the first selection rule includes at least one of the following:

[0182] Select the target carrier for the random access procedure based on the measurement results;

[0183] Randomly select one carrier from multiple carriers with random access resources configured on the network side device as the target carrier;

[0184] The target carrier for the random access procedure is selected based on first information, which is contained in a paging message, a random access response message, or a system message, and is used to indicate the target carrier for the random access procedure.

[0185] The target carrier for the random access procedure is selected based on the load balancing principle;

[0186] The target carrier is selected based on at least one of the following: the second feature supported by the terminal, the RAN slicing identifier allocation information configured by the network, the motivation for triggering the random access procedure, and the priority information corresponding to the first feature. The second or third feature includes at least one of SDT, RedCap, CovEnh, RANslicing, 2-step RA, and 4-step RA. Any two of the first feature, the second feature, and the third feature may be the same or different.

[0187] Select the carrier with the nearest available random access resource as the target carrier.

[0188] In some embodiments, the second selection rule includes at least one of the following:

[0189] Based on at least one of the following: the second feature supported by the terminal, the RAN slicing identifier allocation information configured in the network, the motivation for triggering the random access procedure, and the priority information corresponding to the first feature, the bandwidth portion of the random access resource that supports the third feature is selected as the target bandwidth portion.

[0190] The target bandwidth portion for the random access process is selected based on load balancing principles.

[0191] Randomly select one bandwidth portion from multiple bandwidth portions with random access resources configured on the network-side device as the target bandwidth portion;

[0192] The target bandwidth portion for the random access procedure is selected based on first information, which is contained in a paging message, a random access response message, or a system message, to indicate the target bandwidth portion for the random access procedure.

[0193] The second or third characteristic includes at least one of SDT, RedCap, CovEnh, RAN slicing, 2-step RA, and 4-step RA, wherein any two of the first characteristic, the second characteristic, and the third characteristic are the same or different;

[0194] In some embodiments, the third selection rule includes:

[0195] The target random access type for the random access procedure is selected based on at least one of the following: a second feature supported by the terminal, RAN slicing identifier allocation information configured in the network, motivation for triggering the random access procedure, measurement results, and the configuration information. The second feature includes at least one of SDT, RedCap, CovEnh and RAN slicing, 2-step RA, and 4-step RA. The first feature may be the same as or different from the second feature.

[0196] In some embodiments, the fourth selection rule includes at least one of the following:

[0197] The target downlink reference signal for the random access procedure is selected based on the measurement results and the configured measurement threshold.

[0198] Select a target downlink reference signal from all downlink reference signals associated with the configured random access resources.

[0199] In some embodiments, the fifth selection rule includes:

[0200] If the first condition is met, the first random access preamble group is selected as the target random access preamble group;

[0201] The first condition includes at least one of the following:

[0202] The network side configures the first random access preamble group corresponding to the target random access type;

[0203] The amount of data to be transmitted by the terminal is greater than or equal to the first threshold.

[0204] The downlink path loss measurement value of the terminal is less than the second threshold;

[0205] If the first condition is not met, a second random access preamble group is selected as the target random access preamble group, and the second random access preamble group is different from the first random access preamble group.

[0206] In some embodiments, the sixth selection rule includes:

[0207] A target random access preamble is randomly selected from the target random access preamble group corresponding to the target random access type with equal probability. The target random access preamble and the target downlink reference signal are correlated.

[0208] In some embodiments, the seventh selection rule includes:

[0209] The nearest available random access opportunity is randomly selected from the consecutive random access opportunities corresponding to the target random access type with equal probability as the target random access opportunity.

[0210] In some embodiments, the apparatus further includes:

[0211] The execution module is used to perform the random access procedure;

[0212] The rollback module is used during the random access process to roll back the random access type and reset the target random access type when the random access type selected by the terminal includes RANslicing or SDT and the preset rollback conditions are met.

[0213] The selection module 320 is further configured to select random access resources again based on the target random access type.

[0214] The random access resource selection device in this application embodiment can be a device, a device with an operating system, or an electronic device, or it can be a component, integrated circuit, or chip in a terminal. The device or electronic device can be a mobile terminal or a non-mobile terminal. For example, a mobile terminal can include, but is not limited to, the types of terminals 11 listed above, while a non-mobile terminal can be a server, network attached storage (NAS), personal computer (PC), television (TV), ATM, or self-service machine, etc. This application embodiment does not specifically limit the type of terminal.

[0215] The random access resource selection device provided in this application embodiment can achieve... Figure 4 The various processes implemented in the method embodiments achieve the same technical effect, and will not be described again here to avoid repetition.

[0216] It should be noted that the random access resource configuration method provided in this application embodiment can be executed by a random access resource configuration device, or a module within that device used to execute the loading random access resource configuration method. This application embodiment uses the execution of the loading random access resource configuration method by a random access resource configuration device as an example to illustrate the random access resource configuration method provided in this application embodiment.

[0217] This application provides a random access resource configuration device, such as... Figure 7 As shown, it is applied to network-side devices, including:

[0218] The sending module 410 is used to send configuration information to the terminal, wherein the configuration information is used to indicate the association between the random access resources configured by the network-side device and the first feature;

[0219] The random access resources include at least one of the following:

[0220] Downlink reference signal, carrier, bandwidth portion, random access type, random access preamble, random access preamble group, and random access timing.

[0221] In some embodiments, the configuration information includes at least one of the following:

[0222] The downlink reference signal associated with the random access resource corresponding to the first characteristic;

[0223] The random access resource allocation information corresponding to the first characteristic includes at least one of time location information, frequency location information, code domain information, and power domain information;

[0224] The enabling information for the first characteristic;

[0225] Priority information corresponding to the first characteristic;

[0226] Measurement thresholds used for random access resource selection;

[0227] Configuration parameters used in the random access procedure;

[0228] The measurement threshold or the configuration parameter is related to the first characteristic.

[0229] In some embodiments, the first feature includes at least one of Small Data Transmission Technique (SDT), Reduced Capability NR Terminal (RedCap), Coverage Enhancement (CovEnh), Access Network Slicing (RAN), Two-Step Random Access (2-step RA), and Four-Step Random Access (4-step RA).

[0230] The random access resource configuration device provided in this application embodiment can achieve... Figure 5 The various processes implemented in the method embodiments achieve the same technical effect, and will not be described again here to avoid repetition.

[0231] Optional, such as Figure 8 As shown, this application embodiment also provides a communication device 500, including a processor 501, a memory 502, and a program or instructions stored in the memory 502 and executable on the processor 501. For example, when the communication device 500 is a terminal, the program or instructions executed by the processor 501 implement the various processes of the above-described random access resource selection method embodiment applied to the terminal, and achieve the same technical effect. To avoid repetition, it will not be described again here. When the communication device 500 is a network-side device, the program or instructions executed by the processor 501 implement the various processes of the above-described random access resource configuration method embodiment applied to the network-side device, and achieve the same technical effect. To avoid repetition, it will not be described again here.

[0232] This application embodiment also provides a terminal, including a processor and a communication interface. The processor is used to receive configuration information sent by a network-side device. The configuration information is used to indicate the association between random access resources configured by the network-side device and a first feature. Based on the configuration information and a second feature supported by the terminal, the processor selects random access resources. The random access resources include at least one of the following: downlink reference signal, carrier, bandwidth portion, random access type, random access preamble, random access preamble group, and random access timing.

[0233] This terminal embodiment corresponds to the aforementioned terminal-side method embodiment. All implementation processes and methods of the aforementioned method embodiments can be applied to this terminal embodiment and achieve the same technical effect. Specifically, Figure 9A schematic diagram of the hardware structure of a terminal to implement an embodiment of this application.

[0234] The terminal 1000 includes, but is not limited to, at least some of the following components: radio frequency unit 1001, network module 1002, audio output unit 1003, input unit 1004, sensor 1005, display unit 1006, user input unit 1007, interface unit 1008, memory 1009, and processor 1010.

[0235] Those skilled in the art will understand that the terminal 1000 may also include a power supply (such as a battery) for supplying power to various components. The power supply may be logically connected to the processor 1010 through a power management system, thereby enabling functions such as managing charging, discharging, and power consumption through the power management system. Figure 9 The terminal structure shown does not constitute a limitation on the terminal. The terminal may include more or fewer components than shown, or combine certain components, or have different component arrangements, which will not be elaborated here.

[0236] It should be understood that, in this embodiment, the input unit 1004 may include a graphics processing unit (GPU) 10041 and a microphone 10042. The GPU 10041 processes image data of still images or videos obtained by an image capture device (such as a camera) in video capture mode or image capture mode. The display unit 1006 may include a display panel 10061, which may be configured in the form of a liquid crystal display, an organic light-emitting diode, or the like. The user input unit 1007 includes a touch panel 10071 and other input devices 10072. The touch panel 10071 is also called a touch screen. The touch panel 10071 may include a touch detection device and a touch controller. Other input devices 10072 may include, but are not limited to, physical keyboards, function keys (such as volume control buttons, power buttons, etc.), trackballs, mice, and joysticks, which will not be described in detail here.

[0237] In this embodiment, the radio frequency unit 1001 receives downlink data from the network-side device and processes it for the processor 1010; additionally, it sends uplink data to the network-side device. Typically, the radio frequency unit 1001 includes, but is not limited to, an antenna, at least one amplifier, a transceiver, a coupler, a low-noise amplifier, a duplexer, etc.

[0238] The memory 1009 can be used to store software programs or instructions and various data. The memory 1009 may primarily include a program or instruction storage area and a data storage area. The program or instruction storage area may store the operating system, application programs or instructions required for at least one function (such as sound playback, image playback, etc.). Furthermore, the memory 1009 may include high-speed random access memory and non-volatile memory, wherein the non-volatile memory may be read-only memory (ROM), programmable read-only memory (PROM), erasable programmable read-only memory (EPROM), electrically erasable programmable read-only memory (EEPROM), or flash memory. For example, at least one disk storage device, flash memory device, or other non-volatile solid-state storage device.

[0239] Processor 1010 may include one or more processing units; optionally, processor 1010 may integrate an application processor and a modem processor, wherein the application processor mainly handles the operating system, user interface, and applications or instructions, and the modem processor mainly handles wireless communication, such as a baseband processor. It is understood that the aforementioned modem processor may also not be integrated into processor 1010.

[0240] The processor 1010 is configured to receive configuration information sent by the network-side device, wherein the configuration information is used to indicate the association between the random access resources configured by the network-side device and the first feature.

[0241] Based on the configuration information and the second feature supported by the terminal, a random access resource is selected;

[0242] The random access resources include at least one of the following:

[0243] Downlink reference signal, carrier, bandwidth portion, random access type, random access preamble, random access preamble group, and random access timing.

[0244] In some embodiments, the configuration information includes at least one of the following:

[0245] The downlink reference signal associated with the random access resource corresponding to the first characteristic;

[0246] The random access resource allocation information corresponding to the first characteristic includes at least one of time location information, frequency location information, code domain information, and power domain information;

[0247] The enabling information for the first characteristic;

[0248] Priority information corresponding to the first characteristic;

[0249] Measurement thresholds used for random access resource selection;

[0250] Configuration parameters used in the random access procedure;

[0251] The measurement threshold or the configuration parameter is related to the first characteristic.

[0252] In some embodiments, the first feature includes at least one of Small Data Transmission Technique (SDT), Reduced Capability NR Terminal (RedCap), Coverage Enhancement (CovEnh), Access Network Slicing (RAN), Two-Step Random Access (2-step RA), and Four-Step Random Access (4-step RA).

[0253] In some embodiments, the processor 1010 is configured to select a random access resource based on the configuration information and a second feature supported by the terminal, and further according to a random access resource selection rule, wherein the random access resource selection rule includes at least one of the following:

[0254] The target carrier is determined according to the first carrier selection rule, and the target bandwidth portion is determined according to the second selection rule of the target carrier and the bandwidth portion.

[0255] The target bandwidth portion is determined according to the second selection rule of the bandwidth portion, and the target random access type is determined according to the target bandwidth portion and the third selection rule of the random access type.

[0256] The target downlink reference signal is determined according to the fourth selection rule of the downlink reference signal;

[0257] The target random access preamble group is determined according to the fifth selection rule of the random access preamble group;

[0258] The target random access type is determined according to the third selection rule of the random access type, the downlink reference signal is determined according to the fourth selection rule of the downlink reference signal, the target random access preamble group is determined according to the fifth selection rule of the random access preamble group, and the target random access preamble is determined according to the sixth selection rule of the target random access type, the target downlink reference signal, the target random access preamble group and the random access preamble.

[0259] The target random access type is determined according to the third selection rule of the random access type, the downlink reference signal is determined according to the fourth selection rule of the downlink reference signal, and the target random access timing is determined according to the seventh selection rule of the target random access type, the target downlink reference signal, and the random access timing.

[0260] In some embodiments, the first selection rule includes at least one of the following:

[0261] Select the target carrier for the random access procedure based on the measurement results;

[0262] Randomly select one carrier from multiple carriers with random access resources configured on the network side device as the target carrier;

[0263] The target carrier for the random access procedure is selected based on first information, which is contained in a paging message, a random access response message, or a system message, and is used to indicate the target carrier for the random access procedure.

[0264] The target carrier for the random access procedure is selected based on the load balancing principle;

[0265] The target carrier is selected based on at least one of the following: the second feature supported by the terminal, the RAN slicing identifier allocation information configured by the network, the motivation for triggering the random access procedure, and the priority information corresponding to the first feature. The second or third feature includes at least one of SDT, RedCap, CovEnh, RANslicing, 2-step RA, and 4-step RA. Any two of the first feature, the second feature, and the third feature may be the same or different.

[0266] Select the carrier with the nearest available random access resource as the target carrier.

[0267] In some embodiments, the second selection rule includes at least one of the following:

[0268] Based on at least one of the following: the second feature supported by the terminal, the RAN slicing identifier allocation information configured in the network, the motivation for triggering the random access procedure, and the priority information corresponding to the first feature, the bandwidth portion of the random access resource that supports the third feature is selected as the target bandwidth portion.

[0269] The target bandwidth portion for the random access process is selected based on load balancing principles.

[0270] Randomly select one bandwidth portion from multiple bandwidth portions with random access resources configured on the network-side device as the target bandwidth portion;

[0271] The target bandwidth portion for the random access procedure is selected based on first information, which is contained in a paging message, a random access response message, or a system message, to indicate the target bandwidth portion for the random access procedure.

[0272] The second or third characteristic includes at least one of SDT, RedCap, CovEnh, RAN slicing, 2-step RA, and 4-step RA, wherein any two of the first characteristic, the second characteristic, and the third characteristic are the same or different;

[0273] In some embodiments, the third selection rule includes:

[0274] The target random access type for the random access procedure is selected based on at least one of the following: a second feature supported by the terminal, RAN slicing identifier allocation information configured in the network, motivation for triggering the random access procedure, measurement results, and the configuration information. The second feature includes at least one of SDT, RedCap, CovEnh and RAN slicing, 2-step RA, and 4-step RA. The first feature may be the same as or different from the second feature.

[0275] In some embodiments, the fourth selection rule includes at least one of the following:

[0276] The target downlink reference signal for the random access procedure is selected based on the measurement results and the configured measurement threshold.

[0277] Select a target downlink reference signal from all downlink reference signals associated with the configured random access resources.

[0278] In some embodiments, the fifth selection rule includes:

[0279] If the first condition is met, the first random access preamble group is selected as the target random access preamble group;

[0280] The first condition includes at least one of the following:

[0281] The network side configures the first random access preamble group corresponding to the target random access type;

[0282] The amount of data to be transmitted by the terminal is equal to or equal to the first threshold.

[0283] The downlink path loss measurement value of the terminal is less than the second threshold;

[0284] If the first condition is not met, a second random access preamble group is selected as the target random access preamble group, and the second random access preamble group is different from the first random access preamble group.

[0285] In some embodiments, the sixth selection rule includes:

[0286] A target random access preamble is randomly selected from the target random access preamble group corresponding to the target random access type with equal probability. The target random access preamble and the target downlink reference signal are correlated.

[0287] In some embodiments, the seventh selection rule includes:

[0288] The nearest available random access opportunity is randomly selected from the consecutive random access opportunities corresponding to the target random access type with equal probability as the target random access opportunity.

[0289] In some embodiments, the processor 1010 is configured to execute a random access procedure; during the random access procedure, if the random access type selected by the terminal includes RAN slicing or SDT type and a preset fallback condition is met, a random access type fallback is performed and the target random access type is reset; and a random access resource is selected again according to the target random access type.

[0290] This application embodiment also provides a network-side device, including a processor and a communication interface. The communication interface is used to send configuration information to a terminal. The configuration information is used to indicate the association between random access resources configured by the network-side device and a first characteristic. The random access resources include at least one of the following: a downlink reference signal, a carrier, a bandwidth portion, a random access type, a random access preamble, a random access preamble group, and a random access timing. This network-side device embodiment corresponds to the above-described network-side device method embodiment. All implementation processes and methods of the above method embodiments can be applied to this network-side device embodiment and achieve the same technical effects.

[0291] Specifically, embodiments of this application also provide a network-side device. For example... Figure 10 As shown, the network device 700 includes an antenna 71, a radio frequency (RF) device 72, and a baseband device 73. The antenna 71 is connected to the RF device 72. In the uplink direction, the RF device 72 receives information through the antenna 71 and transmits the received information to the baseband device 73 for processing. In the downlink direction, the baseband device 73 processes the information to be transmitted and sends it to the RF device 72. The RF device 72 processes the received information and then transmits it through the antenna 71.

[0292] The aforementioned frequency band processing device can be located in the baseband device 73. The method executed by the network-side device in the above embodiments can be implemented in the baseband device 73, which includes a processor 74 and a memory 75.

[0293] The baseband device 73 may include, for example, at least one baseband board on which multiple chips are disposed, such as... Figure 10As shown, one of the chips, for example, is a processor 74, which is connected to a memory 75 to call the program in the memory 75 and execute the network device operations shown in the above method embodiment.

[0294] The baseband device 73 may also include a network interface 76 for exchanging information with the radio frequency device 72, such as a common public radio interface (CPRI).

[0295] Specifically, the network-side device in this embodiment of the invention further includes: instructions or programs stored in memory 75 and executable on processor 74, wherein processor 74 calls the instructions or programs in memory 75 to execute. Figure 7 The methods executed by each module shown achieve the same technical effect, and to avoid repetition, they will not be described in detail here.

[0296] This application also provides a readable storage medium storing a program or instructions. When the program or instructions are executed by a processor, they implement the various processes of the above-described random access resource selection method or random access resource configuration method embodiments and achieve the same technical effect. To avoid repetition, they will not be described again here.

[0297] The processor mentioned above is the processor in the terminal described in the above embodiments. The readable storage medium includes computer-readable storage media, such as computer read-only memory (ROM), random access memory (RAM), magnetic disk, or optical disk.

[0298] This application embodiment also provides a chip, which includes a processor and a communication interface. The communication interface is coupled to the processor. The processor is used to run programs or instructions to implement the various processes of the above-described random access resource selection method or random access resource configuration method embodiments, and can achieve the same technical effect. To avoid repetition, it will not be described again here.

[0299] It should be understood that the chip mentioned in the embodiments of this application may also be referred to as a system-on-a-chip, system chip, chip system, or system-on-a-chip, etc.

[0300] This application also provides a computer program / program product, which is stored in a non-volatile storage medium and executed by at least one processor to implement the various processes of the above-described random access resource selection method or random access resource configuration method embodiments, and can achieve the same technical effect. To avoid repetition, it will not be described again here.

[0301] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element. Furthermore, it should be noted that the scope of the methods and apparatuses in the embodiments of this application is not limited to performing functions in the order shown or discussed, but may also include performing functions substantially simultaneously or in the reverse order, depending on the functions involved. For example, the described methods may be performed in a different order than described, and various steps may be added, omitted, or combined. Additionally, features described with reference to certain examples may be combined in other examples.

[0302] Through the above description of the embodiments, those skilled in the art can clearly understand that the methods of the above embodiments can be implemented by means of software plus necessary general-purpose hardware platforms. Of course, they can also be implemented by hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, can be embodied in the form of a computer software product. This computer software product is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk) and includes several instructions to cause a terminal (which may be a mobile phone, computer, server, air conditioner, or network device, etc.) to execute the methods described in the various embodiments of this application.

[0303] The embodiments of this application have been described above with reference to the accompanying drawings. However, this application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of this application.

Claims

1. A method for random access resource selection, characterized in that, Executed by the terminal, including: Receive configuration information sent by the network-side device, wherein the configuration information is used to indicate the association between the random access resources configured by the network-side device and the first characteristic; Based on the configuration information and the second feature supported by the terminal, a random access resource is selected; The random access resources include at least one of the following: Downlink reference signal, carrier, bandwidth portion, random access type, random access preamble, random access preamble group, and random access timing; The configuration information includes at least one of the following: The downlink reference signal associated with the random access resource corresponding to the first characteristic; Priority information corresponding to the first characteristic; The step of selecting random access resources based on the configuration information and the second feature supported by the terminal includes: Based on the configuration information, the second feature supported by the terminal, and the selection rules for random access resources, a random access resource is selected. The selection rules for random access resources include at least one of the following: The target random access type is determined according to the third selection rule of the random access type, the target downlink reference signal is determined according to the fourth selection rule of the downlink reference signal, the target random access preamble group is determined according to the fifth selection rule of the random access preamble group, and the target random access preamble is determined according to the sixth selection rule of the target random access type, the target downlink reference signal, the target random access preamble group and the random access preamble. The target random access type is determined according to the third selection rule of the random access type, the target downlink reference signal is determined according to the fourth selection rule of the downlink reference signal, and the target random access timing is determined according to the seventh selection rule of the target random access type, the target downlink reference signal, and the random access timing.

2. The method according to claim 1, characterized in that, The first feature includes at least one of Small Data Transmission (SDT), Reduced Capability NR Terminal (RedCap), Coverage Enhancement (CovEnh), Access Network Slicing (RAN), Two-Step Random Access (2-step RA), and Four-Step Random Access (4-step RA).

3. The method according to claim 1, characterized in that, The step of selecting random access resources based on the configuration information and the second feature supported by the terminal further includes: Based on the configuration information, the second feature supported by the terminal, and the selection rules for random access resources, a random access resource is selected. The selection rules for random access resources include at least one of the following: The target carrier is determined according to the first carrier selection rule, and the target bandwidth portion is determined according to the second selection rule of the target carrier and the bandwidth portion. The target bandwidth portion is determined according to the second selection rule of the bandwidth portion, and the target random access type is determined according to the target bandwidth portion and the third selection rule of the random access type. The target downlink reference signal is determined according to the fourth selection rule of the downlink reference signal; The target random access preamble group is determined according to the fifth selection rule of the random access preamble group.

4. The method according to claim 3, characterized in that, The first selection rule includes at least one of the following: Select the target carrier for the random access procedure based on the measurement results; Randomly select one carrier from multiple carriers with random access resources configured on the network side device as the target carrier; The target carrier for the random access procedure is selected based on first information, which is contained in a paging message, a random access response message, or a system message, and is used to indicate the target carrier for the random access procedure. The target carrier for the random access procedure is selected based on the load balancing principle; The target carrier is selected based on at least one of the following: the second feature supported by the terminal, the RAN slicing identifier allocation information configured by the network, the motivation for triggering the random access procedure, and the priority information corresponding to the first feature. The second or third feature includes at least one of SDT, RedCap, CovEnh, RANslicing, 2-step RA, and 4-step RA. Any two of the first feature, the second feature, and the third feature may be the same or different. Select the carrier with the nearest available random access resource as the target carrier.

5. The method according to claim 3, characterized in that, The second selection rule includes at least one of the following: Based on at least one of the following: the second feature supported by the terminal, the RAN slicing identifier allocation information configured in the network, the motivation for triggering the random access procedure, and the priority information corresponding to the first feature, the bandwidth portion of the random access resource that supports the third feature is selected as the target bandwidth portion. The target bandwidth portion for the random access process is selected based on load balancing principles. Randomly select one bandwidth portion from multiple bandwidth portions with random access resources configured on the network-side device as the target bandwidth portion; The target bandwidth portion for the random access procedure is selected based on first information, which is contained in a paging message, a random access response message, or a system message, to indicate the target bandwidth portion for the random access procedure. The second or third characteristic includes at least one of SDT, RedCap, CovEnh, RAN slicing, 2-step RA, and 4-step RA, wherein any two of the first characteristic, the second characteristic, and the third characteristic are the same or different.

6. The method according to claim 3, characterized in that, The third selection rule includes: The target random access type for the random access procedure is selected based on at least one of the following: a second feature supported by the terminal, RAN slicing identifier allocation information configured in the network, motivation for triggering the random access procedure, measurement results, and the configuration information. The second feature includes at least one of SDT, RedCap, CovEnh and RAN slicing, 2-step RA, and 4-step RA. The first feature may be the same as or different from the second feature.

7. The method according to claim 3, characterized in that, The fourth selection rule includes at least one of the following: The target downlink reference signal for the random access procedure is selected based on the measurement results and the configured measurement threshold. Select a target downlink reference signal from all downlink reference signals associated with the configured random access resources.

8. The method according to claim 3 or 6, characterized in that, The fifth selection rule includes: If the first condition is met, the first random access preamble group is selected as the target random access preamble group; The first condition includes at least one of the following: The network side configures the first random access preamble group corresponding to the target random access type; The amount of data to be transmitted by the terminal is greater than or equal to the first threshold. The downlink path loss measurement value of the terminal is less than the second threshold; If the first condition is not met, a second random access preamble group is selected as the target random access preamble group, and the second random access preamble group is different from the first random access preamble group.

9. The method according to claim 8, characterized in that, The sixth selection rule includes: A target random access preamble is randomly selected from the target random access preamble group corresponding to the target random access type with equal probability. The target random access preamble and the target downlink reference signal are correlated.

10. The method according to claim 3, characterized in that, The seventh selection rule includes: The nearest available random access opportunity is randomly selected from the consecutive random access opportunities corresponding to the target random access type with equal probability as the target random access opportunity.

11. The method according to claim 1, characterized in that, After the step of selecting random access resources, the method further includes: Perform the random access procedure; During the random access process, if the random access type selected by the terminal includes RAN slicing or SDT and the preset fallback conditions are met, the random access type will be fallbacked and the target random access type will be reset. Based on the target random access type, select random access resources again.

12. A random access resource selection device, characterized in that, Applied to terminals, including: A receiving module is used to receive configuration information sent by a network-side device, wherein the configuration information is used to indicate the association between the random access resources configured by the network-side device and the first characteristic; The selection module is used to select random access resources based on the configuration information and the second feature supported by the terminal; The random access resources include at least one of the following: Downlink reference signal, carrier, bandwidth portion, random access type, random access preamble, random access preamble group, and random access timing; The configuration information includes at least one of the following: The downlink reference signal associated with the random access resource corresponding to the first characteristic; Priority information corresponding to the first characteristic; The selection module is specifically used to select random access resources based on the configuration information, the second feature supported by the terminal, and the selection rules for random access resources. The selection rules for random access resources include at least one of the following: The target random access type is determined according to the third selection rule of the random access type, the target downlink reference signal is determined according to the fourth selection rule of the downlink reference signal, the target random access preamble group is determined according to the fifth selection rule of the random access preamble group, and the target random access preamble is determined according to the sixth selection rule of the target random access type, the target downlink reference signal, the target random access preamble group and the random access preamble. The target random access type is determined according to the third selection rule of the random access type, the target downlink reference signal is determined according to the fourth selection rule of the downlink reference signal, and the target random access timing is determined according to the seventh selection rule of the target random access type, the target downlink reference signal, and the random access timing.

13. The apparatus according to claim 12, characterized in that, The first feature includes at least one of Small Data Transmission (SDT), Reduced Capability NR Terminal (RedCap), Coverage Enhancement (CovEnh), Access Network Slicing (RAN), Two-Step Random Access (2-step RA), and Four-Step Random Access (4-step RA).

14. The apparatus according to claim 12, characterized in that, The selection module is specifically used to select random access resources based on the configuration information, the second feature supported by the terminal, and the selection rules for random access resources. The selection rules for random access resources further include at least one of the following: The target carrier is determined according to the first carrier selection rule, and the target bandwidth portion is determined according to the second selection rule of the target carrier and the bandwidth portion. The target bandwidth portion is determined according to the second selection rule of the bandwidth portion, and the target random access type is determined according to the target bandwidth portion and the third selection rule of the random access type. The target downlink reference signal is determined according to the fourth selection rule of the downlink reference signal; The target random access preamble group is determined according to the fifth selection rule of the random access preamble group.

15. The apparatus according to claim 14, characterized in that, The first selection rule includes at least one of the following: Select the target carrier for the random access procedure based on the measurement results; Randomly select one carrier from multiple carriers with random access resources configured on the network side device as the target carrier; The target carrier for the random access procedure is selected based on first information, which is contained in a paging message, a random access response message, or a system message, and is used to indicate the target carrier for the random access procedure. The target carrier for the random access procedure is selected based on the load balancing principle; The target carrier is selected based on at least one of the following: the second feature supported by the terminal, the RAN slicing identifier allocation information configured by the network, the motivation for triggering the random access procedure, and the priority information corresponding to the first feature. The second or third feature includes at least one of SDT, RedCap, CovEnh, RANslicing, 2-step RA, and 4-step RA. Any two of the first feature, the second feature, and the third feature may be the same or different. Select the carrier with the nearest available random access resource as the target carrier.

16. The apparatus according to claim 14, characterized in that, The second selection rule includes at least one of the following: Based on at least one of the following: the second feature supported by the terminal, the RAN slicing identifier allocation information configured in the network, the motivation for triggering the random access procedure, and the priority information corresponding to the first feature, the bandwidth portion of the random access resource that supports the third feature is selected as the target bandwidth portion. The target bandwidth portion for the random access process is selected based on load balancing principles. Randomly select one bandwidth portion from multiple bandwidth portions with random access resources configured on the network-side device as the target bandwidth portion; The target bandwidth portion for the random access procedure is selected based on first information, which is contained in a paging message, a random access response message, or a system message, to indicate the target bandwidth portion for the random access procedure. The second or third characteristic includes at least one of SDT, RedCap, CovEnh, RAN slicing, 2-step RA, and 4-step RA, wherein any two of the first characteristic, the second characteristic, and the third characteristic are the same or different.

17. The apparatus according to claim 14, characterized in that, The third selection rule includes: The target random access type for the random access procedure is selected based on at least one of the following: a second feature supported by the terminal, RAN slicing identifier allocation information configured in the network, motivation for triggering the random access procedure, measurement results, and the configuration information. The second feature includes at least one of SDT, RedCap, CovEnh and RAN slicing, 2-step RA, and 4-step RA. The first feature may be the same as or different from the second feature.

18. The apparatus according to claim 14, characterized in that, The fourth selection rule includes at least one of the following: The target downlink reference signal for the random access procedure is selected based on the measurement results and the configured measurement threshold. Select a target downlink reference signal from all downlink reference signals associated with the configured random access resources.

19. The apparatus according to claim 14 or 17, characterized in that, The fifth selection rule includes: If the first condition is met, the first random access preamble group is selected as the target random access preamble group; The first condition includes at least one of the following: The network side configures the first random access preamble group corresponding to the target random access type; The amount of data to be transmitted by the terminal is greater than or equal to the first threshold. The downlink path loss measurement value of the terminal is less than the second threshold; If the first condition is not met, a second random access preamble group is selected as the target random access preamble group, and the second random access preamble group is different from the first random access preamble group.

20. The apparatus according to claim 19, characterized in that, The sixth selection rule includes: A target random access preamble is randomly selected from the target random access preamble group corresponding to the target random access type with equal probability. The target random access preamble and the target downlink reference signal are correlated.

21. The apparatus according to claim 14, characterized in that, The seventh selection rule includes: The nearest available random access opportunity is randomly selected from the consecutive random access opportunities corresponding to the target random access type with equal probability as the target random access opportunity.

22. The apparatus according to claim 12, characterized in that, The device further includes: The execution module is used to perform the random access procedure; The rollback module is used during the random access process to roll back the random access type and reset the target random access type when the random access type selected by the terminal includes RANslicing or SDT and the preset rollback conditions are met. The selection module is also used to select random access resources again based on the target random access type.

23. A terminal, characterized in that, It includes a processor, a memory, and a program or instructions stored in the memory and executable on the processor, wherein the program or instructions, when executed by the processor, implement the steps of the random access resource selection method as described in any one of claims 1 to 11.

24. A readable storage medium, characterized in that, The readable storage medium stores a program or instructions that, when executed by a processor, implement the steps of the random access resource selection method as described in any one of claims 1-11.

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