Patent Description:
As technology elements, such as "sensing technology", "wired/wireless communication and network infrastructure", "service interface technology", and "Security technology" have been demanded for IoT implementation, a sensor network, a Machine-to-Machine (M2M) communication,.

Machine Type Communication (MTC), and so forth have been recently researched.

<CIT> which represents the prior art according to Article <NUM>(<NUM>) EPC, discloses a method and an apparatus for performing random access.

The publication "<NPL>, discusses remaining issues related to RACH procedures and provides a corresponding text proposal based on specifications 3GPP TS <NUM>, 3GPP TS <NUM>, 3GPP TS <NUM>, and 3GPP TS <NUM>.

Transmission in a radio communication system includes: transmission from a base station (gNB) to a user equipment (UE) (referred to as downlink transmission) and the corresponding slot is referred to as a downlink slot, and a transmission from the UE to the base station (referred to as uplink transmission) and the corresponding slot is referred as an uplink slot.

In the downlink communication of a radio communication system, the system periodically transmits a synchronization signal and a broadcast channel to the user through a synchronization signal block (SSB, synchronization signal/PBCH block), wherein the period is an SSB periodicity, or referred to as the SSB burst periodicity. Meanwhile, the base station will configure a physical random access channel configuration period (PRACH configuration period), and configures a certain number of random access transmission occasions (also referred as PRACH transmission occasion, RO) in this period and satisfies that all the SSBs in an association period (i.e., a certain of time) can be mapped to the corresponding RO.

In a new radio (NR) communication system, the performance of random access directly affects the user's experience before the establishment of radio resource control, for example, in a random access procedure. In a conventional radio communication system, such as LTE and LTE-Advanced, a random access is applied to multiple scenarios such as establishing an initial link, a cell handover, re-establishing an uplink, and radio resource control (RRC) connection reconstruction. In addition, the random access is divided into contention-based random access and contention-free random access according to whether the user monopolizes the preamble sequence resources. In the contention-based random access, in the procedure of attempting to establish an uplink link, each user selects a preamble sequence from a same preamble sequence resources, and multiple users may select the same preamble sequence to transmit to the base station, so the conflict resolution mechanism is an important research direction in random access. How to reduce the conflict probability and how to quickly resolve conflicts that have already occurred is a key indicator affecting the performance of random access.

The contention-based random access procedure in LTE-A is divided into four steps, as shown in <FIG>. In step <NUM>, a user randomly selects one preamble sequence from a preamble sequence resource pool and transmits it to a base station. The base station performs correlation detection on the received signal to identify the preamble sequence transmitted by the user. In step <NUM>, the base station transmits a random access response (RAR) to the user, which includes a random access preamble sequence identifier, a timing advance command determined according to a time delay estimation between the user and the base station, a cell-radio network temporary identifier (C-RNTI), and time-frequency resources allocated for the next uplink transmission of the user. In step <NUM>, the user transmits a third message (Msg3) to the base station according to the information in the RAR. The Msg3 includes information such as a user terminal identifier and an RRC link request, wherein the user terminal identifier is unique to the user and is used for conflict resolution. In step <NUM>, the base station transmits a conflict resolution identifier to the user which includes the identifier of the user terminal that has won the conflict resolution. After detecting the identity of the user, the user upgrades the temporary C-RNTI to the C-RNTI, and transmits an ACK signal to the base station to complete the random access and wait for the scheduling of the base station. Otherwise, the user will start a new random access after a delay.

For a contention-free based random access procedure, a preamble sequence may be allocated to the user since the base station knows the user identifier. Therefore, when transmitting the preamble sequence, the user does not need to randomly select the sequence, but uses the allocated preamble sequence. After detecting the allocated preamble sequence, the base station transmits a corresponding RAR, which includes information such as timing advance and uplink resource allocation. After receiving the RAR, the user considers that the uplink synchronization has been completed and waits for further scheduling of the base station. Therefore, the contention-free based random access only includes two steps: step <NUM> is to transmit a preamble sequence; and step <NUM> is to transmit an RAR.

The random access in LTE is applicable to the following scenarios:.

The purpose of the present application is to solve at least one of the above technical defects, and the following technical solutions are proposed:.

The dependent claims pertain to corresponding further developments and improvements.

The random access method provided by the embodiment of the present application receives the configuration information for random access from the base station, and provides the premise guarantee for the subsequent random access; and determines the available first ROs according to the at least one configured CSI -RS based on the configuration information, so that the UE can determine the time-frequency resources for random access through the indication of the configured CSI-RS, providing more ways of performing random access while laying the basis for subsequent random access; the random access is performed according to the available first ROs, so that random access is quickly performed according to the ROs determined by the CSI-RS.

The random access method provided by the embodiment of the present application receives the configuration information for random access from the base station, and provides the premise guarantee for the subsequent determination of the ROs; and determines the available the second ROs according to the configured at least one SSB based on the configuration information so that the UE can determine the time-frequency resources for random access through the indication of the configured SSB, providing more ways of performing random access while laying the basis for subsequent random access; the random access is performed according to the available first ROs, so that random access is quickly performed according to the ROs determined by the SSB, and the UE can perform autonomous handover in the presence of long-range interference, thereby increasing the probability of successful random access.

The aspects and advantages of the present invention which is defined by the independent claims, will be set forth in part in the following description, or learned through the practice of the present application.

However, in a <NUM> NR system, there are random access resources based on association of the channel state information-reference signal (CSI-RS) and the RO, in addition to the random access resources based on the association of the SSB and the RO. Therefore, how to enable a UE to determine the time-frequency resources (i.e., RO) for random access through a CSI-RS based indication manner is a problem to be solved.

Embodiments of the present invention will be described in detail hereafter. The examples of these embodiments have been illustrated in the drawings throughout which same or similar reference numerals refer to same or similar elements or elements having same or similar functions. The embodiments described hereafter with reference to the drawings are illustrative, merely used for explaining the present invention and should not be regarded as any limitations thereto.

It should be understood by those skill in the art that singular forms "a", "an", "the", and "said" may be intended to include plural forms as well, unless otherwise stated. It should be further understood that terms "include/including" used in this specification specify the presence of the stated features, integers, steps, operations, elements and/or components, but not exclusive of the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or combinations thereof. It should be understood that when a component is referred to as being "connected to" or "coupled to" another component, it may be directly connected or coupled to other elements or provided with intervening elements therebetween. In addition, "connected to" or "coupled to" as used herein may include wireless connection or coupling. As used herein, the term "and/or" includes all or any one of one or more associated listed items or combinations thereof.

In order to make the objects, technical solutions and advantages of the present application clearer, the embodiments of the present application will be further described in detail below with reference to the accompanying drawings.

Further, in some communication systems, such as a communication system in which remote interference management (RIM) is considered, when a cell base station receives a random access signal in its own cell, it may be interfered by other base stations from other cells. As a result, the success rate of reception is very low, and a lot of accesses of the user fail. Therefore, how to improve the random access success rate of the user in the case of long-range interference is a problem to be solved.

The random access method, terminal equipment and computer readable storage medium provided by the present application are intended to solve the above technical problem of the prior art.

The technical solutions of the present application and how to solve the above technical problem are described in detail in the following specific embodiments. The following specific embodiments may be combined with each other, and the same or similar concepts or processes may not be described in some embodiments. Embodiments of the present application will be described below with reference to the accompanying drawings.

Wherein, a time domain unit (also referred to as a time unit) in the present application may be: one OFDM symbol, one OFDM symbol group (consisting of multiple OFDM symbols), one slot, one slot group (consisting of multiple slots), one subframe, one subframe group (consisting of multiple subframes), one system frame, one system frame group (consisting of multiple system frames); it may be an absolute time unit, such as <NUM> millisecond, <NUM> second, etc.; the time unit could be a combination of multiple granularities, such as N1 slots plus N2 OFDM symbols.

In addition, the frequency domain unit in the present application may be: one subcarrier, one subcarrier group (consisting of multiple subcarriers), one resource block (RB) (it could be referred to as one physical resource block (PRB)), one resource block group (consisting of multiple RBs), one bandwidth part (BWP), one bandwidth part group (consisting of multiple BWPs), one bandwidth/carrier, and one bandwidth group/carrier group; it could be an absolute frequency domain unit, such as <NUM>, <NUM>, etc.; the frequency domain unit could be a combination of multiple granularities, such as M1 PRBs plus M2 subcarriers.

An embodiment of the present application provides a random access method, as shown in <FIG>, including: Step S210: receiving configuration information for random access from a base station; Step S220: determining available first ROs according to at least one configured CSI-RS based on the configuration information; and Step S230: performing random access according to the available first ROs.

Compared with the prior art, the random access method provided by the embodiment of the present application receives the configuration information for random access from the base station, and provides the premise guarantee for the subsequent random access; the available first ROs according to the at least one configured CSI -RS based on the configuration information are determined, so that the UE can determine the time-frequency resources for random access through the indication of the configured CSI-RS, providing more ways of performing random access while laying the basis for subsequent random access; the random access is performed according to the available first ROs, so that random access is quickly performed according to the ROs determined by the CSI-RS.

Specifically, the determining the available first ROs according to at least one configured CSI-RS based on the configured information, includes:.

Further, the determining the available first ROs according to the at least one configured CSI-RS based on the indexing time period, includes:.

Further, the determining the target CSI-RS for determining the ROs according to the at least one configured CSI-RS, including any one of the following situations:.

If there is one configured CSI-RS, the configured CSI-RS is determined as the target CSI-RS;.

Further, the determining the available first ROs associated to the target CSI-RS based on the indexing time period and an index of the at least one RO mapped by the target CSI-RS, including:.

Further, the determining a indexing time period of the RO based on the configuration information, including any one of the following:.

Further, the indexing time period includes any one of the following:.

Further, the indexing at least one RO in each indexing time period according to a predetermined manner, respectively, to obtain the time frequency resource location associated to each RO, including any one of the following cases:.

Further, the selecting ROs to be indexed from the valid ROs, including:
selecting ROs to be indexed from the valid ROs according to the minimum number of valid ROs in each indexing time period and the time-frequency resource locations of the minimum number of valid ROs in the corresponding indexing time period.

Further, the performing random access according to the valid ROs, includes:.

Further, specifically, the configuration information includes one or more of random access configuration information, SSB configuration information or CSI-RS configuration information.

The random access configuration information includes one or more of the following:.

PRACH configuration period; frequency-domain unit index of ROs; time-frequency unit index of ROs; number of ROs; format of random access preamble; number of random access preambles; root sequence index of random access preamble; cyclic shift value of random access preamble; number of SSBs that can be mapped on one RO; index of at least one CSI-RS for random access; number of ROs mapped by one CSI-RS; or index of at least one RO mapped by one CSI-RS. In the present invention, the random access configuration includes includes at least one CSI-RS index and at least one RO corresponding to each of the at least one CSI-RS index.

The SSB configuration information includes one or more of the following:
size of SSB period; number of SSBs transmitted in one SSB period; indexes of SSBs transmitted in one SSB period; time unit locations of SSBs transmitted in one SSB period; or frequency-domain unit locations of SSBs transmitted in one SSB period.

The CSI-RS configuration information includes at one or more of the following:
size of CSI-RS period; number of CSI-RSs transmitted in one CSI-RS period; indexes of CSI-RSs transmitted in one CSI-RS period; time unit locations of CSI-RSs transmitted in one CSI-RS period; or frequency-domain unit locations of CSI-RSs transmitted in one CSI-RS period.

In the following, the random access method of the foregoing embodiment of the present application is described in a comprehensive and detailed manner:.

In a communication system of <NUM>-NR, in addition to the SRB-based RO, there is also a CSI-RS-based RO configuration, therefore the UE needs to obtain a method based on an association from CSI-RS to RO to obtain an available RO method to implement the random access.

Specifically, in this embodiment, the UE obtains configuration information of the network from the network side through system information or RRC configuration message or the downlink control channel, including one or more of the following:
random access configuration information, including one or more of the following:.

The UE may obtain the association information from the SSB to the RO based on the foregoing configuration information, which includes one or more of the following:.

The UE may obtain association information from the CSI-RS to the RO based on the foregoing configuration information, which includes one or more of the following:.

The UE determines a CSI-RS index for determining a RO by configuring one or N (N><NUM>) CSI-RS indexes for random access:.

The UE determines the available ROs according to the association relationship from the CSI-RS to the RO (i.e., to specify the location and number of ROs associated to a given CSI-RS according to one or more RO indexes mapped by one configured CSI-RS), that is to determine one or more ROs (PRACH occasion ROs) currently available for the selected CSI-RS; wherein the UE indexes all the ROs configured in one indexing time period according to a predefined manner (for example, a manner of frequency domain first and then the time domain in the present application, or a manner of time domain first and then frequency domain) according to the indication of the random access configuration information; the indexing of the ROs will be reset per indexing time period (i.e., indexing starting from zero again); wherein the indexing time period may be:.

In the present invention, the indexing time period corresponds to an association pattern period.

As shown in <FIG> is an exemplary indexing diagram of indexing the indexes of all ROs configured in a PRACH configuration period and resetting the sequence of the ROs indexes in different PRACH configuration periods.

Specifically, all the ROs configured in the foregoing one time period may be valid ROs determined after a certain judging rule (i.e., a predetermined selection rule), and the judging rule may be determined by the UE based on uplink and downlink configuration information configured by the network equipment and/or the SSB configuration information, for example, the UE determines:.

As shown in <FIG> is an exemplary indexing diagram of indexing and indexing valid ROs in one PRACH configuration period and resetting the sequence of the RO indexes in different PRACH configuration periods.

In particular, the indexing may be performed according to the minimum number of valid ROs in the time period, that is, indexing with the minimum number of valid ROs in all the time periods. As shown in <FIG>, even in the second PRACH configuration period, the first <NUM> ROs should be valid, but should be indexed based on the <NUM> ROs obtained in the first PRACH configuration period.

The UE determines the ROs available to the UE according to the configured RO index and the available RO obtained by the above association relationship, and performs random access according to the ROs:.

Another embodiment of the present application provides a random access method, as shown in <FIG>, includes: Step S610: receiving configuration information for random access from a base station; Step S620: determining the available second ROs according to at least one configured SSB based on the configuration information; and Step S630: performing random access according to the available second ROs.

Compared with the prior art, the random access method provided by the embodiment of the present application receives the configuration information for the random access from the base station, and provides the premise guarantee for the subsequent determination of the ROs; and the available the second ROs according to the configured at least one SSB based on the configuration information are determined, so that the UE can determine the time-frequency resources for random access through the indication of the configured SSB, providing more ways of performing random access while laying the basis for subsequent random access; the random access is performed according to the available first ROs, so that random access is quickly performed according to the ROs determined by the SSB, and the UE can perform autonomous handover in the presence of long-range interference, thereby increasing the probability of successful random access.

Specifically, the configuration information includes one or more of random access configuration information for no long-range interference, random access configuration information for presence of long-range interference, or SSB configuration information.

Further, the determining available second ROs according to at least one configured SSB based on the configuration information, includes:.

Further, before determining available second ROs according to at least one configured SSB based on the third association information, further includes:.

Further, the method further includes:
obtaining random access configuration selection indication information configured by a base station.

Further, the obtaining random access configuration selection indication information configured by a base station, through one or more of the following:.

Further, the performing random access according to the available second ROs, including:.

The following describes the random access method of the foregoing embodiment of the present application in a comprehensive and detailed manner:
specifically, in this embodiment, in some communication systems that consider RIM, the UE may autonomously select a new random access resource configuration by the method provided in this embodiment or select a new random access configuration based on the indication of the base station equipment; thereby achieving the purpose of improving the success rate of random access.

Specifically, the UE obtains configuration information of the network from the network side through system information or RRC configuration message or the downlink control channel, and includes one or more of the following:
random access configuration information for no-range distance interference; including one or more of the following:.

SSB configuration information; including one or more of the following:.

The UE may obtain association information (different association information from SSB to RO may be obtained based on different random access configuration information) from SSB to RO based on the above random access configuration information (for random access configuration information for no long-range interference or random access configuration information for presence of long-range interference) and SSB configuration information, including one or more the following:.

The UE first sets a random access preamble transmission counter to <NUM>, a preamble power ramping counter to <NUM>, and a random access response PDCCH counter (RAR_PDCCH_counter) to <NUM> based on current default (or pre-selected) random access configuration information (e.g., random access configuration information for no long-range interference, and for example, random access configuration information for presence of long-range interference) and the association information from SSB to RO. Then determining the available RO according to the selected SSB and the determined association information, and transmitting a random access preamble on the determined available RO, that is, determining the available RO according to the configured SSB based on the determined association information from the SSB to RO, and transmitting the random access preamble on the determined available RO, and then using a random access-radio network temporary identifier (RA-RNTI) associated to the determined RO, searching for possible PDCCH on the configured downlink resources and in the random access response window (RAR window), wherein the RAR_PDCCH_counter is for recording the number of times that the UE does not search for the PDCCH matching to the RA-RNTI in the entire RAR window. The present application proposes two ways, so that the UE may autonomously switch from random access based on default (or pre-selected) random access configuration information to random access based on another random access configuration information, for example, switching from a random access configuration information based on no long-range interference to the random access configuration information for the presence of long-range interference. Specifically:.

Furthermore, in addition to the UE autonomously selecting a new random access resource configuration, the present application further provides a manner in which the UE receives the indication of the base station equipment to select new random access configuration resources. The UE obtains N pieces of random access configuration information from the network side, and the network side notifies the user of the specifically-used random access configuration information by the random access configuration selection indication. For example, the UE obtains N=<NUM> pieces of random access configuration information from the network side (for example, one piece of random access configuration information for no long-range interference, and one piece of random access configuration information for presence of long-range interference), the network equipment notifies the UE which random access configuration to use by <MAT> ( <MAT> represents the minimum integer greater than x) bits, for example, N=<NUM>, then M=<NUM>. The UE may obtain the random access configuration selection indication information by using one or more of the following:.

Specifically, if N=<NUM>, the random access configuration selection indication information (or the RI has indication information) may also be indicated by "true" or "false", for example, if the indication is "true", the random access configuration information for presence of long-range interference is used, and if the indication is "false", the random access configuration information for no long-range interference is used.

After obtaining the random access configuration selection indication information, the UE may:.

<FIG> is a schematic structural diagram of a terminal equipment according to an embodiment of the present disclosure. As shown in <FIG>, the terminal equipment <NUM> may include a first receiving module <NUM>, a first determination module <NUM>, and a first access module <NUM>, wherein:.

Specifically, the configuration information includes one or more of random access configuration information, SSB configuration information, or CSI-RS configuration information;
The random access configuration information includes one or more of the following:
PRACH configuration period; frequency-domain unit index of RO; time-frequency unit index of RO; number of ROs; format of random access preamble; number of random access preambles; root sequence index of random access preambles; cyclic shift value of random access preamble; number of SSBs that can be mapped on one RO; index of at least one CSI-RS for random access; number of ROs mapped by one CSI-RS; and index of at least one RO mapped by one CSI-RS.

The SSB configuration information includes one or more of the following:.

Further, the first determination module is specifically configured to determine a indexing time period of the RO based on the configuration information, and determining the available first RO according to the at least one configured CSI-RS based on the indexing time period.

Further, the first determination module is specifically configured to determine a target CSI-RS for determining a RO according to the at least one configured CSI-RS; and determine the available first RO associated to the target CSI-RS based on the indexing time period and an index of at least one RO mapped by the target CSI-RS.

Further, the first determination module is specifically configured to: if there is one configured CSI-RS, the configured CSI-RS is determined as the target CSI-RS; if there are multiple configured CSI-RSs, any CSI-RS selected randomly from the multiple CSI-RSs with a medium probability is determined as the target CSI-RS; and the CSI-RS having the highest reference signal received power among the multiple CSI-RSs is determined as the target CSI-RS.

Further, the first determination module is specifically configured to index at least one RO in each indexing time period according to a predetermined manner respectively, to obtain a time-frequency resource location associated to each RO, wherein the RO represents an initial index reset of the RO in each indexing time period by an index; and determine the time-frequency resource location of the available first RO associated to the target CSI-RS based on a predefined association relationship between the CSI-RS and/or the RO and an index of at least one RO mapped by the target CSI-RS.

Further, the first determination module is specifically configured to determine first association information from SSB to RO and second association information from CSI-RS to RO, the first association information comprises an association period from SSB to the RO and/or an association pattern period from SSB to RO, the second association information comprises an association period from CSI-RS to ROs and/or an association pattern period from the CSI-RS to RO; obtain a PRACH configuration period from the configuration information; compute a time duration in which each CSI-RS configured in one CSI-RS period is completely mapped to a corresponding RO, according to the configuration information; and
compute a time duration in which each SSB configured in one SSB period is completely mapped to a corresponding ROs, according to the configuration information.

Further, the first determination module is specifically configured to index indexes of all the ROs in each indexing time period according to the predetermined manner; or for any indexing time period, select valid ROs from ROs in the indexing time period based on a predetermined selection rule, and index indexes of the valid ROs according to the predetermined manner; or for any indexing time period, select valid ROs from ROs in the indexing time period based on a predetermined selection rule, and select ROs to be indexed from the valid ROs, and index indexes of the ROs to be indexed according to the predetermined manner.

Further, the first determination module is specifically configured to select ROs to be indexed from the valid ROs according to the minimum number of valid ROs in each indexing time period and the time-frequency resource locations of the minimum number of valid ROs in the corresponding indexing time period.

Further, the first access module is specifically configured to perform random access according to the first ROs if there is one time-frequency resource location of available first ROs; or if there are multiple time-frequency resource locations of available first ROs, one or more of the following operations is performed:.

Compared with the prior art, the equipment provided by the embodiment of the present application receives the configuration information for the random access from the base station, and provides the premise guarantee for the subsequent random access; and determine the available first ROs according to the at least one configured CSI -RS based on the configuration information, so that the UE can determine the time-frequency resources for random access through the indication of the configured CSI-RS, providing more ways of performing random access while laying the basis for subsequent random access; the random access is performed according to the available first ROs, so that random access is quickly performed according to the ROs determined by the CSI-RS.

<FIG> illustrates a schematic structural diagram of a terminal equipment according to an embodiment of the present application. As shown in <FIG>, the terminal equipment <NUM> may include a second receiving module <NUM>, a second determination module <NUM>, and a second access module <NUM>, wherein:.

Further, the second determination module <NUM> is specifically configured to determine third association information between SSB and RO according to first configuration information or second configuration information, the first configuration information comprises current random access configuration information for no long-range interference and the SSB configuration information, the second configuration information comprises current random access configuration information for presence of long-range interference and the SSB configuration information; and determine available second ROs according to at least one configured SSB based on the third association information.

Further, an initialization module (not shown) is further included, the initialization module is specifically configured to initialize random access preamble transmission counter, preamble power ramping counter and random access response PDCCH counter, wherein the random access preamble transmission counter is used for recording number of times of transmission of the random access preambles, the random access response PDCCH counter is used for recording number of times that the PDCCH of the random access radio network temporary identify matched with the second RO is not searched in a random access response search window.

Wherein, the second access module <NUM> is specifically configured to: if the value of the random access preamble transmission counter is greater than or equal to a configured threshold for switching random access configuration information or the value of the random access response PDCCH counter is greater than or equal to the threshold for switching random access configuration information, then performing any one of the following operations:.

Further, the equipment further includes an obtaining module (not shown) for obtaining random access configuration selection indication information configured by the base station.

Further, the obtaining module is specifically configured to obtain random access configuration selection indication information configured by the base station by using one or more of the following:.

Further, the second access module <NUM> is specifically configured to perform random access according to the available second ROs, in a transmission time period in which the random access configuration selection indication information is received, based on the random access configuration information indicated by the random access configuration selection indication information; or, perform random access according to the available second ROs in a next transmission time period of the transmission time period in which the random access configuration selection indication information is received, based on the random access configuration information indicated by the random access configuration selection indication information;
the transmission time period includes any one of the following:
SSB period; PRACH configuration period; paging period; a configured modification period; an association time period from SSB to RO.

Compared with the prior art, the device provided by the embodiment of the present application receives the configuration information for the random access from the base station, and provides the premise guarantee for the subsequent determination of the ROs; and determines the available the second ROs according to the configured at least one SSB based on the configuration information so that the UE can determine the time-frequency resources for random access through the indication of the configured SSB, providing more ways of performing random access while laying the basis for subsequent random access. The random access is performed according to the available first ROs, so that random access is quickly performed according to the ROs determined by the SSB, and the UE can perform autonomous handover in the presence of long-range interference, thereby increasing the probability of successful random access.

Another embodiment of the present invention provides a terminal equipment comprising: a processor; and a memory configured to store machine readable instructions that, when executed by the processor, cause the processor to perform the above random access method.

<FIG> illustrates a block diagram that schematically illustrates a computing system according to an embodiment of the present disclosure that can be used to implement the UE of the present disclosure.

As shown in <FIG>, a computing system <NUM> includes a processor <NUM>, a computer readable storage medium <NUM>, an output interface <NUM>, and an input interface <NUM>. The computing system <NUM> may perform the method described above with reference to <FIG> or <FIG> to configure a reference signal and perform data transmission based on the reference signal.

In particular, the processor <NUM> may include, for example, a general purpose microprocessor, an instruction set processor, and/or a related chipset and/or a special purpose microprocessor (e.g., an application specific integrated circuit (ASIC)), and the like. The processor <NUM> may also include an onboard memory for caching purposes. The processor <NUM> may be a single processing unit or a plurality of processing units for performing different actions of the method flow described with reference to <FIG> or <FIG>.

The computer readable storage medium <NUM>, for example, may be any medium that can contain, store, communicate, propagate or transport the instructions. For example, a readable storage medium may include, but is not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, device, or propagation medium. Specific examples of the readable storage medium include: a magnetic storage apparatus such as a magnetic tape or a hard disk (HDD); an optical storage apparatus such as a compact disk (CD-ROM); a memory such as a random access memory (RAM) or a flash memory; and/or a wired/wireless communication link.

The computer readable storage medium <NUM> may include a computer program, which may include codes/computer executable instructions that, when executed by the processor <NUM>, cause the processor <NUM> to perform, for example, the method flow described above in combination with <FIG> or <FIG> and any variations thereof.

The computer program may be configured to have, for example, computer program codes including a computer program module. For example, in an example embodiment, the codes in the computer program may include one or more program modules, including, for example, module <NUM>, module <NUM>, - - -. It should be noted that the division manner and number of modules are not fixed, and those skilled in the art may use suitable program modules or program module combinations according to actual cases. When these program module combinations are executed by the processor <NUM>, the processor <NUM> may perform, for example, the method flow described above in connection with <FIG> or <FIG> and any variations thereof.

According to an embodiment of the present disclosure, the processor <NUM> may use the output interface <NUM> and the input interface <NUM> to perform the method flow described above in connection with <FIG> or <FIG> and any variations thereof.

It should be understood that although the various steps in the flowchart of the drawings are sequentially displayed as indicated by the arrows, these steps are not necessarily performed in the order indicated by the arrows. Except as explicitly stated herein, the execution of these steps is not strictly limited, and may be performed in other sequences. Moreover, at least some of the steps in the flowchart of the drawings may include a plurality of sub-steps or stages, which are not necessarily performed at the same time, but may be executed at different times, and the execution order thereof is also not necessarily performed sequentially, but may be performed alternately or alternately with at least a portion of other steps or sub-steps or stages of other steps.

Claim 1:
A method performed by a user equipment, UE (<NUM>; <NUM>), in a wireless communication system, the method comprising:
receiving (S610), from a base station, configuration information for random access, wherein the configuration information includes at least one channel state information-reference signal, CSI-RS, indexes and at least one physical random access channel occasions, ROs, corresponding to each of the at least one CSI-RS indexes;
determining (S620) ROs associated with the at least one CSI-RS indexes based on the configuration information; and
performing (S630) a random access according to the ROs,
wherein an indexing of the ROs indicated by the at least one ROs is reset per an association pattern period and
wherein the association pattern period includes one or more association periods and is associated with a pattern based on a synchronization signal block, SSB, and the ROs.