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JP-7854920-B2 - Random access procedures in next-generation networks

JP7854920B2JP 7854920 B2JP7854920 B2JP 7854920B2JP-7854920-B2

Inventors

  • マリー， ジョセフ エム．
  • アドジャクパル， パスカル エム．
  • チェン， ウェイ
  • アイヤール， ラクシュミ アール．
  • ジャン， チアン
  • ツァイ， アラン ワイ．
  • ジャン， グオドン
  • リ， チン

Assignees

  • インターデイジタル パテント ホールディングス インコーポレイテッド

Dates

Publication Date
20260507
Application Date
20221031
Priority Date
20160615

Claims (18)

  1. Apparatus, the apparatus, Non-transient memory containing instructions for performing random access in a network, The system comprises a processor operably coupled to the non-transient memory, wherein the processor An instruction to measure a beam in a downlink sweep subframe, wherein the downlink sweep subframe includes an initial access signal comprising two or more synchronization signals and a master information block (MIB) constituting system information (SI), and the two or more synchronization signals are composed of a synchronization signal and a beam training reference signal , A command to select a first downlink transmission beam based on the measured beam, Instructions for determining the random access preamble associated with the first downlink transmission beam and the physical random access channel (PRACH) resource associated with the first downlink transmission beam, The system is configured to execute an instruction that transmits the random access preamble to a node via the PRACH resource, The random access preamble is selected from a set of random access preambles associated with the first downlink transmission beam based on the device type and service type . The PRACH resource is randomly selected from a set of PRACH resources associated with the first downlink transmission beam.
  2. The apparatus according to claim 1, wherein the preamble continuously includes a cyclic prefix period, a Zadoff-Chu sequence period, and a protection period.
  3. The aforementioned processor, Instructions to monitor the downlink control channel for random access responses (RARs), The apparatus according to claim 1, further configured to execute a command to receive the RAR from the node.
  4. The PRACH resource is configured in the uplink sweep slot of the uplink subframe, The apparatus according to claim 1, wherein the time resource of the PRACH resource is determined by the first downlink transmission beam.
  5. The apparatus according to claim 3, wherein the monitoring command continues over a period including one or more downlink sweep subframes.
  6. The apparatus according to claim 5, wherein the command to be monitored includes identifying the Random Access Radio Network Temporary Identifier (RA-RNTI) of the RAR.
  7. The apparatus according to claim 6, wherein the RAR includes a random access preamble identifier that matches the transmitted random access preamble.
  8. The apparatus according to claim 1, wherein the network is a new wireless (NR) network.
  9. The apparatus described in claim 1 is a user device.
  10. The apparatus according to claim 1, wherein the node is a base station.
  11. A wireless communication method in a network, Transmitting an initial access signal via a first downlink transmission beam, which includes two or more synchronization signals and a master information block (MIB) constituting system information (SI) , wherein the two or more synchronization signals consist of a synchronization signal and a beam training reference signal . A wireless communication method comprising receiving a random access preamble selected from a set of random access preambles associated with the first downlink transmission beam, based on a device type and a service type , via a physical random access channel (PRACH) resource associated with the first downlink transmission beam.
  12. The wireless communication method according to claim 11, wherein the preamble continuously includes a cyclic prefix period, a Zadoff-Chu sequence period, and a protection period.
  13. The wireless communication method according to claim 11, wherein the network is a new wireless (NR).
  14. A wireless transceiver unit (WTRU), The system receives configuration parameters associated with a physical random access channel (PRACH), and these configuration parameters indicate multiple random access preambles and multiple PRACH resources. Based on the device type and service type, a random access preamble is selected from the plurality of random access preambles. The selected random access preamble is transmitted via at least one PRACH resource among the plurality of PRACH resources. The downlink control channel is monitored for information associated with the random access response (RAR) in response to the transmission of the selected random access preamble. A wireless transceiver unit equipped with a processor configured in such a way.
  15. The aforementioned multiple random access preambles include multiple random access preamble subsets, and the selected random access preamble is associated with the random access preamble subset corresponding to the service type. The wireless transmitting and receiving unit according to claim 14.
  16. The configuration parameters associated with the PRAC are received via a broadcast of system information. The wireless transmitting and receiving unit according to claim 14.
  17. The service type corresponds to a network slice, and the random access preamble subset associated with the selected random access preamble is associated with the network slice. The wireless transceiver unit according to claim 15.
  18. The at least one PRACH resource is randomly selected from a plurality of PRACH resources associated with a first downlink transmit beam based on the measured beam. The wireless transmitting and receiving unit according to claim 14.

Description

(Citation of related application) This application is U.S. Provisional Application No. 62/350,379 (filed June 15, 2016, title "R andom Access Procedures in Next Gen Netw (orks) and U.S. Provisional Application No. 62/400,813 (filed September 28, 2016) Claiming priority rights to the application named "NR Random Access," both applications are incorporated herein by reference in their entirety. (Field) This application applies to random access procedures on a device. NextGen networks are expected to support a diverse set of use cases, including, but not limited to, mMTC, eMBB, and UR/LL. Network/RAN slicing is a concept proposed to enable operators to meet the diverse and sometimes conflicting requirements of these use cases. However, traditional procedures such as random access are not designed to support network/RAN slicing architectures. There is a need to develop new random access procedures that are optimized for NextGen networks configured for network/RAN slicing. New radio (NR) access technologies are currently being studied to identify and develop technical components for systems operating at frequencies up to 100 GHz. Beamforming is expected to be employed to compensate for the increased path loss in these high-frequency NR (HF-NR) systems. However, existing random access procedures based on omnidirectional or sector-based transmission do not support the functions required for beamforming-based access, such as beam sweeping, beam pairing, and beam training. There is a need for enhanced random access procedures that support beamforming for NR networks. To facilitate a more solid understanding of this application, accompanying drawings are referenced here, where similar elements are referred to using the same numbering. These drawings are intended solely for illustrative purposes and should not be construed as limiting this application. Figure 1A illustrates an exemplary communication system according to one embodiment of the present invention. Figure 1B illustrates an exemplary device configured for wireless communication according to one embodiment of the present invention. Figure 1C illustrates a diagram of a wireless access network and a core network according to one embodiment of the present invention. Figure 1D illustrates a diagram of a wireless access network and a core network according to another embodiment of the present application. Figure 1E illustrates a diagram of a wireless access network and a core network according to yet another embodiment of the present application. Figure 1F illustrates a block diagram of an exemplary computing system according to one embodiment of the present invention that communicates with one or more networks as described above in Figures 1A, 1C, 1D, and 1E. Figure 2A is a schematic diagram illustrating the RRC protocol state machine. Figure 2B is a schematic diagram illustrating the system information acquisition procedure. Figure 3 is a schematic diagram of the measurement model used in LTE. Figure 4 is a schematic diagram of the layer 2 structure for DL. Figure 5 is a schematic diagram of a two-layer structure for UL. Figure 6 is a schematic diagram illustrating the random access preamble format. Figure 7 is a schematic diagram illustrating the PRACH resource definition. Figure 8 is a schematic diagram illustrating a contention-based random access procedure. Figure 9 is a schematic diagram of the structure for LTE DL multi-antenna transmission. Figure 10 is a schematic diagram of cell coverage with a sector beam and multiple high-gain narrow beams. Figure 11 is a schematic diagram of a virtual cell. Figure 12 is a schematic diagram illustrating the transition from RRC_IDLE to RRC_CONNECTED. Figure 13 is a schematic diagram illustrating the concept of network slicing. Figure 14 is a schematic diagram illustrating an exemplary configuration that supports RAN slicing. Figure 15 is a schematic diagram illustrating the common PRACH resources. Figure 16 is a schematic diagram illustrating a common PRACH resource that supports multiple numerology systems. Figure 17 is a schematic diagram illustrating an exemplary common PRACH resource configuration that supports one mMTC, two eMBBs, and four UR/LLPRACH resources. Figure 18 is a schematic diagram illustrating an exemplary common PRACH resource configuration with "stacked" mMTC PRACH resources. Figure 19 is a schematic diagram illustrating the PRACH resources specific to a slice. Figure 20 is a schematic diagram illustrating a random access procedure that uses a common PRACH resource. Figure 21 is a schematic diagram illustrating the service-based partitioning of the random access preamble. Figure 22 is a schematic diagram illustrating the service type MAC CE. Figure 23 is a schematic diagram illustrating a random access procedure that uses a slice-specific PRACH resource. Figure 24 is a schematic diagram illustrating a random access procedure involving permissionless transmission. Figure 25A-C is a schematic diagram