Physical random access channel mask application
Patent Information
- Application Number
- PCT/CN2025/085861
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- Filing Date
- 2025-03-28
- Publication Date
- 2026-10-01
Smart Images

Figure CN2025085861_01102026_PF_FP_ABST
Abstract
Description
PHYSICAL RANDOM ACCESS CHANNEL MASK APPLICATIONFIELD:
[0001] Some example embodiments may generally relate to mobile or wireless telecommunication systems, such as Long Term Evolution (LTE) or fifth generation (5G) new radio (NR) access technology, or 5G beyond, or sixth generation (6G) access technology, or other communications systems. For example, certain example embodiments may relate to physical random access channel (PRACH) mask application.BACKGROUND:
[0002] Examples of mobile or wireless telecommunication systems may include the Universal Mobile Telecommunications System (UMTS) Terrestrial Radio Access Network (UTRAN) , Long Term Evolution (LTE) Evolved UTRAN (E-UTRAN) , LTE-Advanced (LTE-A) , MulteFire, LTE-A Pro, fifth generation (5G) radio access technology or new radio (NR) access technology and / or sixth generation (6G) radio access technology. Fifth generation (5G) and sixth generation (6G) wireless systems refer to the next generation (NG) of radio systems and network architecture. 5G and 6G network technology is mostly based on new radio (NR) technology, but the 5G / 6G (or NG) network can also build on E-UTRAN radio. It is estimated that NR may provide bitrates on the order of 10-20 Gbit / sor higher, and may support at least enhanced mobile broadband (eMBB) and ultra-reliable low-latency communication (URLLC) as well as massive machine-type communication (mMTC) . NR is expected to deliver extreme broadband and ultra-robust, low-latency connectivity and massive networking to support the Internet of Things (IoT) .SUMMARY:
[0003] Some example embodiments may be directed to a method. The method may include receiving, from a network element, a downlink control information command to trigger a random access procedure, including an indication of availability of a second set of physical random access channel resources alongside a first set of physical random access channel resources, and an indication of at least one random access occasion to perform a physical random access channel transmission for the triggered random access procedure. The method may also include determining whether the indication of at least one random access occasion applies to the first set of physical random access channel resources or the second set of physical random access channel resources, or both. The method may further include applying indication of at least one random access occasion to the determined at least one set of random access occasions. In addition, the method may include performing the physical random access channel transmission over the at least one indicated random access occasions for the triggered random access procedure.
[0004] Other example embodiments may be directed to an apparatus. The apparatus may include at least one processor, and at least one memory storing instructions which, when executed by the at least one processor, cause the apparatus to at least receive, from a network element, a downlink control information command to trigger a random access procedure, including an indication of availability of a second set of physical random access channel resources alongside a first set of physical random access channel resources, and an indication of at least one random access occasion to perform a physical random access channel transmission for the triggered random access procedure. The apparatus may also be caused to determine whether the indication of at least one random access occasion applies to the first set of physical random access channel resources or the second set of physical random access channel resources, or both. The apparatus may further be caused to apply indication of at least one random access occasion to the determined at least one set of random access occasions. In addition, the apparatus may be caused to perform the physical random access channel transmission over the at least one indicated random access occasions for the triggered random access procedure.
[0005] Other example embodiments may be directed to an apparatus. The apparatus may include means for receiving, from a network element, a downlink control information command to trigger a random access procedure, including an indication of availability of a second set of physical random access channel resources alongside a first set of physical random access channel resources, and an indication of at least one random access occasion to perform a physical random access channel transmission for the triggered random access procedure. The apparatus may also include means for determining whether the indication of at least one random access occasion applies to the first set of physical random access channel resources or the second set of physical random access channel resources, or both. The apparatus may further include means for applying indication of at least one random access occasion to the determined at least one set of random access occasions. In addition, the apparatus may include means for performing the physical random access channel transmission over the at least one indicated random access occasions for the triggered random access procedure.
[0006] In accordance with other example embodiments, a non-transitory computer readable medium may be encoded with instructions that may, when executed in hardware, perform a method. The method may include receiving, from a network element, a downlink control information command to trigger a random access procedure, including an indication of availability of a second set of physical random access channel resources alongside a first set of physical random access channel resources, and an indication of at least one random access occasion to perform a physical random access channel transmission for the triggered random access procedure. The method may also include determining whether the indication of at least one random access occasion applies to the first set of physical random access channel resources or the second set of physical random access channel resources, or both. The method may further include applying indication of at least one random access occasion to the determined at least one set of random access occasions. In addition, the method may include performing the physical random access channel transmission over the at least one indicated random access occasions for the triggered random access procedure.
[0007] Other example embodiments may be directed to a computer program product that performs a method. The method may include receiving, from a network element, a downlink control information command to trigger a random access procedure, including an indication of availability of a second set of physical random access channel resources alongside a first set of physical random access channel resources, and an indication of at least one random access occasion to perform a physical random access channel transmission for the triggered random access procedure. The method may also include determining whether the indication of at least one random access occasion applies to the first set of physical random access channel resources or the second set of physical random access channel resources, or both. The method may further include applying indication of at least one random access occasion to the determined at least one set of random access occasions. In addition, the method may include performing the physical random access channel transmission over the at least one indicated random access occasions for the triggered random access procedure.
[0008] Other example embodiments may be directed to an apparatus that may include circuitry configured to receive, from a network element, a downlink control information command to trigger a random access procedure, including an indication of availability of a second set of physical random access channel resources alongside a first set of physical random access channel resources, and an indication of at least one random access occasion to perform a physical random access channel transmission for the triggered random access procedure. The apparatus may also include circuitry configured to determine whether the indication of at least one random access occasion applies to the first set of physical random access channel resources or the second set of physical random access channel resources, or both. The apparatus may further include circuitry configured to apply indication of at least one random access occasion to the determined at least one set of random access occasions. In addition, the apparatus may include circuitry configured to perform the physical random access channel transmission over the at least one indicated random access occasions for the triggered random access procedure.BRIEF DESCRIPTION OF THE DRAWINGS:
[0009] For proper understanding of example embodiments, reference should be made to the accompanying drawings, wherein:
[0010] FIG. 1 illustrates an example of various synchronization signal block (SSB) to random access channel occasion (RO) mappings.
[0011] FIG. 2 illustrates an example table of physical random access channel (PRACH) mask index values.
[0012] FIG. 3 illustrates an example legacy PRACH mask table.
[0013] FIG. 4 illustrates an example new PRACH mask table, according to certain example embodiments.
[0014] FIG. 5 illustrates an example new interpretation of the PRACH mask table, according to certain example embodiments.
[0015] FIG. 6 illustrates an example of another new interpretation of the PRACH mask table, according to certain example embodiments.
[0016] FIG. 7 illustrates an example of another new PRACH mask table, according to certain example embodiments.
[0017] FIG. 8 illustrates an example flow diagram of a method, according to certain example embodiments.
[0018] FIG. 9 illustrates a set of apparatuses according to certain example embodiments.
[0019] FIG. 10 illustrates an example of a 5G / 6G network and system architecture, according to certain example embodiments.
[0020] FIG. 11 illustrates an example 6G architecture, according to certain example embodiments.
[0021] FIG. 12 illustrates an example 6G radio access network (RAN) protocol stack, according to certain example embodiments.DETAILED DESCRIPTION:
[0022] It will be readily understood that the components of certain example embodiments, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations. The following is a detailed description of some example embodiments of systems, methods, apparatuses, and computer program products for physical random access channel (PRACH) mask application. For example, certain example embodiments may be directed to PRACH mask application in response to a physical downlink control channel (PDCCH) order for triggering PRACH.
[0023] The features, structures, or characteristics of example embodiments described throughout this specification may be combined in any suitable manner in one or more example embodiments. For example, the usage of the phrases “certain embodiments, ” “an example embodiment, ” “some embodiments, ” or other similar language, throughout this specification refers to the fact that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment. Thus, appearances of the phrases “in certain embodiments, ” “an example embodiment, ” “in some embodiments, ” “in other embodiments, ” or other similar language, throughout this specification do not necessarily refer to the same group of embodiments, and the described features, structures, or characteristics may be combined in any suitable manner in one or more example embodiments. Further, the terms “base station” , “cell” , “node” , “gNB” , “network” or other similar language throughout this specification may be used interchangeably. Additionally, the term “physical random access channel (PRACH) ” and “PRACH mask index” may be used interchangeably throughout this specification.
[0024] As used herein, “at least one of the following: <a list of two or more elements>” and “at least one of <a list of two or more elements>” and similar wording, where the list of two or more elements are joined by “and” or “or, ” mean at least any one of the elements, or at least any two or more of the elements, or at least all the elements.
[0025] The specifications of the 3rd Generation Partnership Project (3GPP) describe network energy savings (NES) , and specify certain adaptations of common signal / channel transmissions. An example of signal / channel transmission may include an adaptation of physical random access channel (PRACH) in the time domain. The adaptation of PRACH in the time domain may support a same PRACH configuration index for additional PRACH resources as a PRACH configuration index for legacy resources. The adaptation of PRACH in the time domain may also support a different PRACH configuration index for the additional PRACH resources as the PRAcH configuration index for the legacy resources.
[0026] In some examples, the PRACH in the time domain may support a 1-bit field in downlink control information (DCI) 1_0 with a cell radio network temporary identifier (C-RNTI) for a UE in connected mode of a PRACH in the time-domain. The 1-bit field in DCI 1_0 may be used to allocate downlink (DL) resources for physical downlink shared channel (PDSCH) , and may be used to trigger a PRACH (e.g., physical downlink control channel (PDCCH) order) to indicate whether additional PRACH resource (s) is available for the triggered PRACH. The behavior of the UE (e.g., applicable resources for PRACH mask index) may depend at least in part by the availability of the additional PRACH resource (s) .
[0027] PRACH in the time domain may support semi-static signaling of a single PRACH mask in a DCI-based adaptation for additional PRACH resources. The support for semi-static signaling of a single PRACH may identify a subset of the additional PRACH resources. The single PRACH mask may contain multiple units including, for example, a PRACH association period, a PRACH association pattern period, and a signal frequency network (SFN) level. The PRACH association period may be determined based on valid additional random access channel (RACH) occasions (ROs) , and the PRACH mask may be applied after a valid RO determination and synchronization signal block (SSB) RO mapping. The PRACH association pattern period may include one or more association periods, and may be determined so that a pattern between PRACH occasions and synchronization signal (SS) / PBCH block indices repeats at most every 160 msec is not impacted due to application of the PRACH mask. In some instances, the DCI does not indicate the PRACH mask selection.
[0028] As described herein, the PRACH in the time-domain may support a 1-bit field in DCI 1_0 with C-RNTI. If the cyclic redundancy check (CRC) of the DCI format 1_0 is scrambled by C-RNTI and the frequency domain resource assignment field are all ones, the DCI format 1_0 may be designated for random access procedure initiated by a PDCCH order.
[0029] The PRACH mask index may be obtained from a PRACH mask table. The PRACH mask table may be pre-defined with N = [4 or 8 or 16] rows, and the semi-static signaling indicates a PRACH mask index. The PRACH mask index may contain 4 bits. If the value of the random access preamble index is not all zeros, the PRACH mask index indicates the RACH occasion associated with the SS / PBCH indicated by SS / PBCH index for the PRACH transmission of contention-free random access resources. The SS / PBCH index may contain 6 bits. If the value of the random access preamble index is not all zeros, the random access preamble index indicates the SS / PBCH that is used to determine the RACH occasion for the PRACH transmission. Otherwise, the value of the random access preamble index is reserved.
[0030] The PRACH mask index also indicates a subset of RACH occasion (s) from the rach-ConfigDedicated for the UL carrier (indicated by S / U field) , if provided. Otherwise, the PRACH mask index indicates a subset of RACH occasions from the rach-ConfigCommon for the UL carrier (indicated by the S / U field) in the UL bandwidth part (BWP) configuration of firstActiveUplinkBWP-ID. When the repetition number field is not set to 0, the UE may ignore this field. The S / U field indicates which UL carrier to transmit the PRACH of the contention-free random access resources. The S / U field may have a length of 1 bit, and if the value of the S / U field is set to 1, supplementary uplink (SUL) is used. Otherwise, normal uplink (NUL) is used.
[0031] The SUL field indicates whether a medium access control (MAC) control element (CE) applies to the NUL carrier or SUL carrier configuration. Furthermore, the SUL field may be set to 1 to indicate that it is applicable to the SUL carrier configuration, and the SUL field may be set to 0 to indicate that it is applicable to the NUL carrier configuration.
[0032] FIG. 1 illustrates an example of various SSB to RO mappings. As illustrated in FIG. 1, the mapping between the SSB and the RACH occasion may be defined by RRC parameters. For instance, the RRC parameter may include a msg1-frequency division multiplexing (FDM) , which specifies a number of ROs that are allocated in the frequency domain (at the same location in the time-domain) . The RRC parameter may also include a ssb-perRACH-OccasionAndCB-PreamblesPerSSB parameter which specifies a number of SSBs that can be mapped to one RO (e.g., mapped to each PRACH occasion for 4-step RA type) , and specifies a number of preamble indices that can be mapped to a single SSB. For example, if N<1, one SS / PBCH block index may be mapped to 1 / N consecutive valid PRACH occasions.
[0033] FIG. 2 illustrates an example table of PRACH mask index values. The PRACH mask may be configured to the UE to indicate where the UE can transmit PRACH. For instance, as illustrated in FIG. 2, 11 available codepoints are provided for the gNB to allow the UE to use at least a specific RO for performing PRACH transmission. In some instances, a NES PRACH resource mask may be applied on additional PRACH resources for PRACH adaptation in the time domain. Additional mechanisms may also be used for restricting the PRACH resources that a NES UE can choose from, with granularity given in terms of association periods or association pattern periods. For instance, PRACH resources may be restricted using a NES PRACH mask, which can be semi-statically signalled to UEs. The NES PRACH mask may be applied on additional PRACH resources to identify a subset of additional PRACH resources (out of the determined PRACH resources) that the UE can choose from for any of the UE’s initial access procedures supported on additional ROs (e.g., contention-based random access (CBRA) / contention-free random access (CFRA) ) .
[0034] With the adaptation of PRACH in the time domain, a PDCCH order may be transmitted via DCI format 1_0 with CRC scrambled via C-RNTI. The PDCCH order may include an SS / PDCH index, ra-PreambleIndex, and a PRACH mask index (e.g., PDCCH order PRACH mask index) . Additional PRACH resources may be indicated to the UEs semi-statically. For example, the activation of the additional PRACH resources may be indicated to UEs using DCI 1_0 with paging-RNTI (P-RNTI) . The network (NW) may also configure a PRACH mask semi-statically to be applied on the additional PRACH resources.
[0035] As indicated in RAN1, a 1-bit field in DCI 1_0 with C-RNTI may be used to trigger PRACH (e.g., PDCCH order) to indicate whether additional PRACH resource (s) is available for a triggered PRACH. If the 1-bit field in DCI 1_0 indicates 0, then additional PRACH resource (s) is not available for the triggered PRACH, and the UE may only consider legacy ROs (e.g., all UEs including, for example, UEs and R19 capable UEs; additional ROs may be used by R19 capable UEs, and the additional ROs may be semi-statically configured and dynamically activated via DCI) , after which legacy behavior may follow. However, if the 1-bit field indicates 1, then additional PRACH resource (s) is available for the triggered PRACH, and the UE may consider additional ROs along with legacy ROs. Additionally, if the 1-bit field indicates 1, the UE behavior may be defined by, for example, determining the applicable resources for PDCCH order PRACH mask index. In view of the above, it may be desirable to consider UE behavior in the presence of the 1-bit field in DCI 1_0 with C-RNTI. For example, it may be possible to determine whether the PRACH mask provided via PDCCH order is applied to additional ROs (if available) and / or to legacy ROs for PDCCH order based RACH procedures.
[0036] In certain example embodiments, the PRACH mask (in PDCCH order) may be applied separately or jointly to the additional ROs and / or legacy ROs. An example of legacy ROs is illustrated FIG. 3, which includes a legacy PRACH mask table with N (e.g., number of ROs) set to 8. As illustrated in FIG. 1, the PRACH mask indices provide indications of subsets allowed PRACH occasions of the SSB. In some example embodiments, the RACH mask may be applied separately to the legacy ROs and / or the additional ROs depending on which of these two resources is available. In certain example embodiments, the NW may provide an explicit indication to the UE in the form of 1 bit from up to 4 reserved bits out of 10 (or 12) that are unused in the DCI format 1_0 scrambled with C-RNTI. In some example embodiments, the explicit indication may be provided to the UE to indicate whether the additional or the legacy ROs are to be used for a preamble transmission. In certain example embodiments, when the one bit is set to 0, this indicates that legacy ROs should be used. On the other hand, when the bit set is 1, this indicates that additional ROs should be used.
[0037] According to certain example embodiments, when the PRACH mask is not applicable to one of additional ROs or legacy ROs, the PRACH mask may serve as an implicit indication to the UE to transmit a preamble over the other type of ROs. For example, if the PRACH mask is not applicable to legacy ROs, the UE is implicitly indicated to transmit the preamble over additional ROs.
[0038] In certain example embodiments, the UE may determine if the PRACH mask is applicable or not applicable based on a PRACH configuration of the legacy and the additional PRACH resources. For example, if the PRACH configuration includes a number of SS / PBCH blocks mapped to ROs that is greater than or equal to 1 (e.g., there are no consecutive ROs mapped to each SSB / PBCH block) , and / or a PRACH mask field indicates a codepoint different from 0 (all) , 1 (first one) or 10 (odd ones) , then the PRACH mask is not applicable. In other words, if the PRACH mask index indicates a PRACH occasion index that does not correspond to any available RO in a SSB-RO mapping cycle of the legacy ROs or the additional ROs, then it is not applicable to the legacy ROs or the additional ROs, respectively.
[0039] According to certain example embodiments, another option for addressing how the PRACH mask can be applied to additional ROs and / or to legacy ROs may include applying the PRACH mask jointly to the combination of the legacy ROs and the additional ROs. For instance, the PDCCH order PRACH mask may be used and the PRACH mask may indicate the PRACH occasions for the PRACH transmission. Additionally, in one example embodiment, the PDCCH order PRACH mask may be applied over a set of up to 8 ROs including legacy and additional ROs associated with the SS / PBCH block index indicated by the SS / PBCH block index field of the PDCCH order. According to other example embodiments, the legacy PRACH mask index values may be used.
[0040] In certain example embodiments, a new PRACH mask may be used, and the new PRACH mask may indicate the PRACH occasions for the PRACH transmission. When a new PRACH mask is used, a new table or a different interpretation of the existing PRACH mask may occur. By providing a new table, consideration of a PRACH mask table with less than 16 rows may be considered. Additionally, a new interpretation of the existing PRACH mask may suggest that the interpretation of the existing table and indices is different. According to certain example embodiments, the new PRACH mask may be applied over a set of N ROs including legacy and additional ROs associated with the SS / PBCH block index indicated by the SS / PBCH block index field of the PDCCH order. In some example embodiments, the value of N may be determined by the UE based on the configuration of the additional ROs and / or the legacy ROs or N may be indicated to the UE via higher-layer signaling, or N may be hardcoded in the specification. Additionally, N may correspond to the combination of two sets of legacy and additional ROs assembled with the SS / PBCH block index.
[0041] According to certain example embodiments, the UE may determine which PRACH mask to apply. For instance, according to certain example embodiments, the UE may determine which mask to apply based on whether the 1-bit used to indicate additional PRACH resource is available. If the 1-bit used to indicate additional PRACH resource is available, the new PRACH mask is used. In other example embodiments, the UE may determine which mask to apply based on an additional bit from the up to 4 reserved bits out of the 10 (or 12) that are not used in the DCI format 1_0 scrambled with C-RNTI, even in the context of LTM. If this additional bit is used, the additional bit may indicate whether to use the new PRACH mask over the set of N ROs. In further example embodiments, the UE may determine which mask to apply based on higher-layer signaling (e.g., SIB1, as part of the RACH resources configuration such as, for example, RACHConfig-Common) .
[0042] In certain example embodiments, when the PRACH mask (e.g., PDCCH order PRACH mask) is applied to the combination of legacy ROs and additional ROs, the new PRACH mask table may be defined. For example, for N>8, a new table may be introduced, or an existing table may be reused by using the reserved codepoints. The new table may include, for example, the new tables illustrated in FIGs. 4 and 7 with N=4 and N=16, respectively. For N<8, a new table may be introduced, or a new interpretation of the existing table may be defined. The new interpretation may include tables illustrated in FIGs. 5 and 6 with N=4 and N=16, respectively, and where the new interpretation of the PRACH mask in FIG. 5 uses 3 bits of the PRACH mask field and 1 reserved bit of the PRACH mask field. In other example embodiments, the PRACH table used by the UE may be indicated to the UE via higher-layer signaling.
[0043] According to certain example embodiments, the N ROs may be ordered and / or indexed. For example, the N ROs may be ordered and / or indexed in increasing order of frequency resource index for frequency multiplexed PRACH occasions including legacy and additional ROs. According to other example embodiments, the N ROs may be ordered and / or indexed in increasing order of time resource indices for time multiplexed PRACH occasions within a PRACH slot, including legacy and additional ROs. According to further example embodiments, the N ROs may be ordered and / or indexed in increasing order of indices for PRACH slots, including legacy and additional ROs.
[0044] FIG. 8 illustrates an example flow diagram of a method, according to certain example embodiments. In an example embodiment, the method of FIG. 8 may be performed by a network entity, or a group of multiple network elements in a 3GPP system, such as LTE or 5G-NR. For instance, in an example embodiment, the method of FIG. 8 may be performed by a UE, similar to apparatus 10 illustrated in FIG. 9.
[0045] As illustrated in FIG. 8, the method may include, at 800, receiving, from a network element, a downlink control information command to trigger a random access procedure. The downlink control information command may include an indication of availability of a second set of physical random access channel resources alongside a first set of physical random access channel resources, and an indication of at least one random access occasion to perform a physical random access channel transmission for the triggered random access procedure. The method may also include, at 805, determining whether the indication of at least one random access occasion applies to the first set of physical random access channel resources or the second set of physical random access channel resources, or both. The method may further include, at 810, applying indication of at least one random access occasion to the determined at least one set of random access occasions. In addition, the method may include, at 815, performing the physical random access channel transmission over the at least one indicated random access occasions for the triggered random access procedure.
[0046] According to certain example embodiments, the downlink control information command may be a physical downlink control channel order, and the indication of at least one random access occasion may be a physical random access channel mask. According to some example embodiments, the downlink control information command may be applied over the at least one set of random access occasions including a combination of the first set of physical random access channel resources and the second set of physical random access channel resources. According to other example embodiments, the physical downlink control channel order may indicate a physical random access channel occasion for the physical random access channel transmission.
[0047] In certain example embodiments, the application of the indication of at least one random access occasion may be dependent upon an availability of resources of the first set of physical random access channel resources and resources of the second set of physical random access channel resources. In some example embodiments, the application of the indication of at last one random access occasion may further dependent upon an explicit indication in the form of a 1-bit field in the downlink control information command, or an implicit indication when the downlink control information command is not applicable to one of the first set of physical random access channel resources or the second set of physical random access channel resources. In other example embodiments, when the application is not applicable to one of the first set of physical random access channel resources or the second set of physical random access channel resources, the method may further include transmitting a preamble over one of the first set of physical random access channel resources or the second set of physical random access channel resources that are applicable.
[0048] According to certain example embodiments, the method may also include applying the downlink control information command jointly to a combination of the first set of physical random access channel resources and the second set of physical random access channel resources. According to some example embodiments the method may also include applying a new physical downlink control channel order that indicates a physical random access channel occasion for the physical random access channel transmission. According to other example embodiments, the method may further include applying the new physical downlink control channel order over a set number of random access occasions comprising a combination of the first set of physical random access channel resources and the second set of physical random access channel resources.
[0049] In certain example embodiments, the set number of random access occasions may be determined based on a configuration of the first set of physical random access channel resources and the second set of physical random access channel resources, or based on the set number of random access occasions being received by the apparatus via a higher-layer signaling. In some example embodiments, the method may further include determining to apply either the physical downlink control channel order or the new physical downlink control channel order based on at least one of whether a 1-bit is used to indicate the second set of physical random access channel resources is available, an additional bit from up to 4 reserved bits out of 10 that are not used in a downlink control information format 1_0 scrambled with a cell radio network temporary identifier, or a higher-layer signaling.
[0050] FIG. 9 illustrates a set of apparatuses 10 and 20 according to certain example embodiments. In certain example embodiments, apparatuses 10 and 20 may be elements in a communications network or associated with such a network. For example, apparatus 10 may be a UE, or other similar radio communication computer device, and apparatus 20 may be a BS, gNB, network, or other similar computing device.
[0051] In some example embodiments, apparatuses 10 and 20 may include one or more processors, one or more computer-readable storage medium (for example, memory, storage, or the like) , one or more radio access components (for example, a modem, a transceiver, or the like) , and / or a user interface. In some example embodiments, apparatuses 10 and 20 may be configured to operate using one or more radio access technologies, such as GSM, LTE, LTE-A, NR, 5G, WLAN, WiFi, NB-IoT, Bluetooth, NFC, MulteFire, and / or any other radio access technologies. It should be noted that one of ordinary skill in the art would understand that apparatuses 10 and 20 may include components or features not shown in FIG. 9.
[0052] As illustrated in the example of FIG. 9, apparatuses 10 and 20 may include or be coupled to a processor 12 and 22 for processing information and executing instructions or operations. Processors 12 and 22 may be any type of general or specific purpose processor. In fact, processors 12 and 22 may include one or more of general-purpose computers, special purpose computers, microprocessors, DSPs, field-programmable gate arrays (FPGAs) , application-specific integrated circuits (ASICs) , and processors based on a multi-core processor architecture, as examples. While a single processor 12 and 22 is shown in FIG. 9, multiple processors may be utilized according to other example embodiments. For example, it should be understood that, in certain example embodiments, apparatuses 10 and 20 may include two or more processors that may form a multiprocessor system (e.g., in this case processors 12 may represent a multiprocessor) that may support multiprocessing. According to certain example embodiments, the multiprocessor system may be tightly coupled or loosely coupled (e.g., to form a computer cluster) .
[0053] Processors 12 and 22 may perform functions associated with the operation of apparatuses 10 and 20 including, as some examples, precoding of antenna gain / phase parameters, encoding and decoding of individual bits forming a communication message, formatting of information, and overall control of the apparatuses 10 and 20, including processes and examples illustrated in FIGs. 1-8.
[0054] Apparatuses 10 and 20 may further include or be coupled to a memories 14 and 24 (internal or external) , which may be respectively coupled to processors 12 and 24 for storing information and instructions that may be executed by processors 12 and 24. Memories 14 and 24 may be one or more memories and of any type suitable to the local application environment, and may be implemented using any suitable volatile or nonvolatile data storage technology such as a semiconductor-based memory device, a magnetic memory device and system, an optical memory device and system, fixed memory, and / or removable memory. For example, memories 14 and 24 can be any combination of random access memory (RAM) , read only memory (ROM) , static storage such as a magnetic or optical disk, hard disk drive (HDD) , or any other type of non-transitory machine or computer readable media. The instructions stored in memories 14 and 24 may include program instructions or computer program code that, when executed by processors 12 and 22, enable the apparatuses 10 and 20 to perform tasks as described herein.
[0055] In certain example embodiments, apparatuses 10 and 20 may further include or be coupled to (internal or external) a drive or port that is configured to accept and read an external computer readable storage medium, such as an optical disc, USB drive, flash drive, or any other storage medium. For example, the external computer readable storage medium may store a computer program or software for execution by processors 12 and 22 and / or apparatuses 10 and 20 to perform any of the methods and examples illustrated in FIGs. 1-8.
[0056] In some example embodiments, apparatuses 10 and 20 may also include or be coupled to one or more antennas 15 and 25 for receiving a downlink signal and for transmitting via an UL from apparatuses 10 and 20. Apparatuses 10 and 20 may further include a transceivers 18 and 28 configured to transmit and receive information. The transceivers 18 and 28 may also include a radio interface (e.g., a modem) coupled to the antennas 15 and 25. The radio interface may correspond to a plurality of radio access technologies including one or more of GSM, LTE, LTE-A, 5G, NR, WLAN, NB-IoT, Bluetooth, BT-LE, NFC, RFID, UWB, and the like. The radio interface may include other components, such as filters, converters (for example, digital-to-analog converters and the like) , symbol demappers, signal shaping components, an Inverse Fast Fourier Transform (IFFT) module, and the like, to process symbols, such as OFDMA symbols, carried by a downlink or an UL.
[0057] For instance, transceivers 18 and 28 may be configured to modulate information on to a carrier waveform for transmission by the antennas 15 and 25 and demodulate information received via the antenna 15 and 25 for further processing by other elements of apparatuses 10 and 20. In other example embodiments, transceivers 18 and 28 may be capable of transmitting and receiving signals or data directly. Additionally or alternatively, in some example embodiments, apparatus 10 may include an input and / or output device (I / O device) . In certain example embodiments, apparatuses 10 and 20 may further include a user interface, such as a graphical user interface or touchscreen.
[0058] In certain example embodiments, memories 14 and 34 store software modules that provide functionality when executed by processors 12 and 22. The modules may include, for example, an operating system that provides operating system functionality for apparatuses 10 and 20. The memory may also store one or more functional modules, such as an application or program, to provide additional functionality for apparatuses 10 and 20. The components of apparatuses 10 and 20 may be implemented in hardware, or as any suitable combination of hardware and software. According to certain example embodiments, apparatuses 10 and 20 may optionally be configured to communicate each other (in any combination) via a wireless or wired communication links 70 according to any radio access technology, such as NR.
[0059] According to certain example embodiments, processors 12 and 22 and memories 14 and 24 may be included in or may form a part of processing circuitry or control circuitry. In addition, in some example embodiments, transceivers 18 and 28 may be included in or may form a part of transceiving circuitry.
[0060] For instance, in certain example embodiments, apparatus 10 may be controlled by memory 14 and processor 12 to receive, from a network element, a downlink control information command to trigger a random access procedure. The downlink control information command may include an indication of availability of a second set of physical random access channel resources alongside a first set of physical random access channel resources, and an indication of at least one random access occasion to perform a physical random access channel transmission for the triggered random access procedure. Apparatus 10 may also be controlled by memory 14 and processor 12 to determine whether the indication of at least one random access occasion applies to the first set of physical random access channel resources or the second set of physical random access channel resources, or both. Apparatus 10 may further be controlled by memory 14 and processor 12 to apply indication of at least one random access occasion to the determined at least one set of random access occasions. In addition, apparatus 10 may be controlled by memory 14 and processor 12 to perform the physical random access channel transmission over the at least one indicated random access occasions for the triggered random access procedure.
[0061] In some example embodiments, an apparatus (e.g., apparatus 10 and / or apparatus 20) may include means for performing a method, a process, or any of the variants discussed herein. Examples of the means may include one or more processors, memory, controllers, transmitters, receivers, and / or computer program code for causing the performance of the operations.
[0062] Certain example embodiments may be directed to an apparatus that includes means for performing any of the methods described herein including, for example, means for receiving, from a network element, a downlink control information command to trigger a random access procedure. The downlink control information command may include an indication of availability of a second set of physical random access channel resources alongside a first set of physical random access channel resources, and an indication of at least one random access occasion to perform a physical random access channel transmission for the triggered random access procedure. The apparatus may also include means for determining whether the indication of at least one random access occasion applies to the first set of physical random access channel resources or the second set of physical random access channel resources, or both. The apparatus may further include means for applying indication of at least one random access occasion to the determined at least one set of random access occasions. In addition, the apparatus may include means for performing the physical random access channel transmission over the at least one indicated random access occasions for the triggered random access procedure.
[0063] FIG. 10 illustrates an example of a 5G / 6G network and system architecture, according to certain example embodiments. Shown are multiple network functions that may be implemented as software operating as part of a network device or dedicated hardware, as a network device itself or dedicated hardware, or as a virtual function operating as a network device or dedicated hardware. The UE illustrated in FIG. 10 may be similar to UE 10. The user plane function (UPF) may provide services such as intra-RAT and inter-RAT mobility, routing and forwarding of data packets, inspection of packets, user plane quality of service (QoS) processing, buffering of downlink packets, and / or triggering of downlink data notifications. The application function (AF) may primarily interface with the core network to facilitate application usage of traffic routing and interact with the policy framework .
[0064] FIG. 11 illustrates an example 6G architecture, according to certain example embodiments. In particular, the 6G architecture in FIG. 9 may support LCM configured to natively support AI / ML, cloud-native functionalities. Additionally, 6G gNBs may be configured to support multi-RAT spectrum sharing (MRSS) .
[0065] FIG. 12 illustrates an example 6G RAN protocol stack, according to certain example embodiments. The 6G RAN protocol stack may share some similarities with a 5G RAN protocol stack. For example, the depicted 6G RAN protocol stack may incorporate service data application protocol (SDAP) , packet data convergence protocol (PDCP) , radio link control (RLC) , and medium access control (MAC) functions, which may interface with multiple radio protocol units (RPUs) .
[0066] Certain example embodiments described herein provide several technical improvements, enhancements, and / or advantages. For instance, in some example embodiments, it may be possible to define UE behavior with respect to the application of the PRACH mask to additional ROs (when available) and / or to legacy ROs for PDCCH order based on RACH procedure. In other example embodiments, it may be possible to define how the PRACH mask (in PDCCH order) can be applied to additional ROs (when available) and / or to legacy ROs. For instance, certain example embodiments may define how the additional ROs and the legacy ROs can be applied separately or jointly. In other example embodiments, the NW may have more flexibility to control the PRACH occasions for different UEs.
[0067] A computer program product may include one or more computer-executable components which, when the program is run, are configured to carry out some example embodiments. The one or more computer-executable components may be at least one software code or portions of it. Modifications and configurations required for implementing functionality of certain example embodiments may be performed as routine (s) , which may be implemented as added or updated software routine (s) . Software routine (s) may be downloaded into the apparatus.
[0068] As an example, software or a computer program code or portions of it may be in a source code form, object code form, or in some intermediate form, and it may be stored in some sort of carrier, distribution medium, or computer readable medium, which may be any entity or device capable of carrying the program. Such carriers may include a record medium, computer memory, read-only memory, photoelectrical and / or electrical carrier signal, telecommunications signal, and software distribution package, for example. Depending on the processing power needed, the computer program may be executed in a single electronic digital computer or it may be distributed amongst a number of computers. The computer readable medium or computer readable storage medium may be a non-transitory medium.
[0069] In other example embodiments, the functionality may be performed by hardware or circuitry included in an apparatus (e.g., apparatus 10 or apparatus 20) , for example through the use of an application specific integrated circuit (ASIC) , a programmable gate array (PGA) , a field programmable gate array (FPGA) , or any other combination of hardware and software. In yet another example embodiment, the functionality may be implemented as a signal, a non-tangible means that can be carried by an electromagnetic signal downloaded from the Internet or other network.
[0070] According to certain example embodiments, an apparatus, such as a node, device, or a corresponding component, may be configured as circuitry, a computer or a microprocessor, such as single-chip computer element, or as a chipset, including at least a memory for providing storage capacity used for arithmetic operation and an operation processor for executing the arithmetic operation.
[0071] One having ordinary skill in the art will readily understand that the disclosure as discussed above may be practiced with procedures in a different order, and / or with hardware elements in configurations which are different than those which are disclosed. Therefore, although the disclosure has been described based upon these example embodiments, it would be apparent to those of skill in the art that certain modifications, variations, and alternative constructions would be apparent, while remaining within the spirit and scope of example embodiments. Although the above embodiments refer to 5G NR and LTE technology, the above embodiments may also apply to any other present or future 3GPP technology, such as LTE-advanced, and / or fourth generation (4G) technology.
[0072] Partial Glossary:
[0073] 3GPP 3rd Generation Partnership Project
[0074] 5G 5th Generation
[0075] 5GC 5G Core
[0076] 5GCN 5G Core Network
[0077] BS Base Station
[0078] DCI Downlink Control Information
[0079] DL Downlink
[0080] eNB Enhanced Node B
[0081] E-UTRAN Evolved UTRAN
[0082] gNB 5G or Next Generation NodeB
[0083] NES Network Energy Saving
[0084] PDSCH Physical Downlink Shared Channel
[0085] PrACH Physical RACH
[0086] PL Pathloss
[0087] RA Random Access
[0088] RACH RA Channel
[0089] RRC Radio Resource Control
[0090] SSB Synchronization Signal Block
[0091] UE User Equipment
[0092] UL Uplink
[0093] RF Radio Frequency
Claims
1.An apparatus, comprising:at least one processor; andat least one memory storing instructions which, when executed by the at least one processor, cause the apparatus to at least:receive, from a network element, a downlink control information command to trigger a random access procedure, including an indication of availability of a second set of physical random access channel resources alongside a first set of physical random access channel resources, and an indication of at least one random access occasion to perform a physical random access channel transmission for the triggered random access procedure; anddetermine whether the indication of at least one random access occasion applies to the first set of physical random access channel resources or the second set of physical random access channel resources, or both;apply indication of at least one random access occasion to the determined at least one set of random access occasions; andperform the physical random access channel transmission over the at least one indicated random access occasions for the triggered random access procedure.2.The apparatus according to claim 1, wherein the downlink control information command is a physical downlink control channel order, and the indication of at least one random access occasion is a physical random access channel mask.3.The apparatus according to claims 1 or 2, wherein the downlink control information command is applied over the at least one set of random access occasions comprising a combination of the first set of physical random access channel resources and the second set of physical random access channel resources.4.The apparatus according to claim 2, wherein the physical downlink control channel order indicates a physical random access channel occasion for the physical random access channel transmission.5.The apparatus according to any one of claims 1-4, wherein the application of the indication of at least one random access occasion is dependent upon an availability of resources of the first set of physical random access channel resources and resources of the second set of physical random access channel resources.6.The apparatus according to any one of claims 1-5, wherein the application of the indication of at last one random access occasion is further dependent uponan explicit indication in the form of a 1-bit field in the downlink control information command, oran implicit indication when the downlink control information command is not applicable to one of the first set of physical random access channel resources or the second set of physical random access channel resources.7.The apparatus according to claim 6, wherein when the application is not applicable to one of the first set of physical random access channel resources or the second set of physical random access channel resources, the instructions, when executed by the at least one processor, further cause the apparatus to:transmit a preamble over one of the first set of physical random access channel resources or the second set of physical random access channel resources that are applicable.8.The apparatus according to any one of claims 1-7, wherein the instructions, when executed by the at least one processor, further cause the apparatus to:apply the downlink control information command jointly to a combination of the first set of physical random access channel resources and the second set of physical random access channel resources.9.The apparatus according to any one of claims 1-8, wherein the instructions, when executed by the at least one processor, further cause the apparatus to:apply a new physical downlink control channel order that indicates a physical random access channel occasion for the physical random access channel transmission.10.The apparatus according to claim 9, wherein the instructions, when executed by the at least one processor, further cause the apparatus to:apply the new physical downlink control channel order over a set number of random access occasions comprising a combination of the first set of physical random access channel resources and the second set of physical random access channel resources.11.The apparatus according to claim 10, wherein the set number of random access occasions is determinedbased on a configuration of the first set of physical random access channel resources and the second set of physical random access channel resources, orbased on the set number of random access occasions being received by the apparatus via a higher-layer signaling.12.The apparatus according to any one of claims 1-11, wherein the instructions, when executed by the at least one processor, further cause the apparatus to:determine to apply either the physical downlink control channel order or the new physical downlink control channel order based on at least one of the following:whether a 1-bit is used to indicate the second set of physical random access channel resources is available,an additional bit from up to 4 reserved bits out of 10 that are not used in a downlink control information format 1_0 scrambled with a cell radio network temporary identifier, ora higher-layer signaling.13.A method, comprising:receiving, from a network element, a downlink control information command to trigger a random access procedure, including an indication of availability of a second set of physical random access channel resources alongside a first set of physical random access channel resources, and an indication of at least one random access occasion to perform a physical random access channel transmission for the triggered random access procedure; anddetermining whether the indication of at least one random access occasion applies to the first set of physical random access channel resources or the second set of physical random access channel resources, or both;applying indication of at least one random access occasion to the determined at least one set of random access occasions; andperforming the physical random access channel transmission over the at least one indicated random access occasions for the triggered random access procedure.14.The method according to claim 13, wherein the downlink control information command is a physical downlink control channel order, and the indication of at least one random access occasion is a physical random access channel mask.15.The method according to claims 13 or 14, wherein the downlink control information command is applied over the at least one set of random access occasions comprising a combination of the first set of physical random access channel resources and the second set of physical random access channel resources.16.The method according to claim 14, wherein the physical downlink control channel order indicates a physical random access channel occasion for the physical random access channel transmission.17.The method according to any one of claims 13-16, wherein the application of the indication of at least one random access occasion is dependent upon an availability of resources of the first set of physical random access channel resources and resources of the second set of physical random access channel resources.18.The method according to any one of claims 13-17, wherein the application of the indication of at last one random access occasion is further dependent uponan explicit indication in the form of a 1-bit field in the downlink control information command, oran implicit indication when the downlink control information command is not applicable to one of the first set of physical random access channel resources or the second set of physical random access channel resources.19.The method according to claim 18, wherein when the application is not applicable to one of the first set of physical random access channel resources or the second set of physical random access channel resources, the method further comprises:transmitting a preamble over one of the first set of physical random access channel resources or the second set of physical random access channel resources that are applicable.20.The method according to any one of claims 13-19, further comprising:applying the downlink control information command jointly to a combination of the first set of physical random access channel resources and the second set of physical random access channel resources.21.The method according to any one of claims 13-20, further comprising:applying a new physical downlink control channel order that indicates a physical random access channel occasion for the physical random access channel transmission.22.The method according to claim 21, further comprising:applying the new physical downlink control channel order over a set number of random access occasions comprising a combination of the first set of physical random access channel resources and the second set of physical random access channel resources.23.The method according to claim 22, wherein the set number of random access occasions is determinedbased on a configuration of the first set of physical random access channel resources and the second set of physical random access channel resources, orbased on the set number of random access occasions being received by the apparatus via a higher-layer signaling.24.The method according to any one of claims 13-23, further comprising:determining to apply either the physical downlink control channel order or the new physical downlink control channel order based on at least one of the following:whether a 1-bit is used to indicate the second set of physical random access channel resources is available,an additional bit from up to 4 reserved bits out of 10 that are not used in a downlink control information format 1_0 scrambled with a cell radio network temporary identifier, ora higher-layer signaling.25.An apparatus, comprisingmeans for receiving, from a network element, a downlink control information command to trigger a random access procedure, including an indication of availability of a second set of physical random access channel resources alongside a first set of physical random access channel resources, and an indication of at least one random access occasion to perform a physical random access channel transmission for the triggered random access procedure; andmeans for determining whether the indication of at least one random access occasion applies to the first set of physical random access channel resources or the second set of physical random access channel resources, or both;means for applying indication of at least one random access occasion to the determined at least one set of random access occasions; andmeans for performing the physical random access channel transmission over the at least one indicated random access occasions for the triggered random access procedure.26.The apparatus according to claim 25, wherein the downlink control information command is a physical downlink control channel order, and the indication of at least one random access occasion is a physical random access channel mask.27.The apparatus according to claims 25 or 26, wherein the downlink control information command is applied over the at least one set of random access occasions comprising a combination of the first set of physical random access channel resources and the second set of physical random access channel resources.28.The apparatus according to claim 26, wherein the physical downlink control channel order indicates a physical random access channel occasion for the physical random access channel transmission.29.The apparatus according to any one of claims 25-28, wherein the application of the indication of at least one random access occasion is dependent upon an availability of resources of the first set of physical random access channel resources and resources of the second set of physical random access channel resources.30.The apparatus according to any one of claims 25-29, wherein the application of the indication of at last one random access occasion is further dependent uponan explicit indication in the form of a 1-bit field in the downlink control information command, oran implicit indication when the downlink control information command is not applicable to one of the first set of physical random access channel resources or the second set of physical random access channel resources.31.The apparatus according to claim 30, wherein when the application is not applicable to one of the first set of physical random access channel resources or the second set of physical random access channel resources, the apparatus further comprises:means for transmitting a preamble over one of the first set of physical random access channel resources or the second set of physical random access channel resources that are applicable.32.The apparatus according to any one of claims 25-31, further comprising:means for applying the downlink control information command jointly to a combination of the first set of physical random access channel resources and the second set of physical random access channel resources.33.The apparatus according to any one of claims 25-32, further comprising:means for applying a new physical downlink control channel order that indicates a physical random access channel occasion for the physical random access channel transmission.34.The apparatus according to claim 33, further comprising:means for applying the new physical downlink control channel order over a set number of random access occasions comprising a combination of the first set of physical random access channel resources and the second set of physical random access channel resources.35.The apparatus according to claim 34, wherein the set number of random access occasions is determinedbased on a configuration of the first set of physical random access channel resources and the second set of physical random access channel resources, orbased on the set number of random access occasions being received by the apparatus via a higher-layer signaling.36.The apparatus according to any one of claims 25-35, further comprising:means for determining to apply either the physical downlink control channel order or the new physical downlink control channel order based on at least one of the following:whether a 1-bit is used to indicate the second set of physical random access channel resources is available,an additional bit from up to 4 reserved bits out of 10 that are not used in a downlink control information format 1_0 scrambled with a cell radio network temporary identifier, ora higher-layer signaling.37.A non-transitory computer readable medium comprising program instructions stored thereon for performing the method according to any of claims 13-24.38.An apparatus comprising circuitry configured to cause the apparatus to perform the method according to any of claims 13-24.