Random access channel parameter set method and device and computer readable medium

Abstract

In one aspect of the invention, a method, a computer readable medium, and an apparatus are presented. The apparatus may be a UE. The UE receives a random access response from the base station at the active downlink bandwidth portion, the random access response indicating uplink resources in the active uplink bandwidth portion used to transmit the random access message, where the active uplink bandwidth portion is different from the initial uplink bandwidth portion configured for the UE. The UE generates a random access message based on the parameter set of the active uplink bandwidth portion. The UE transmits a random access message on uplink resources of the active uplink bandwidth portion. The method of a random access channel parameter set with bandwidth portion operation of the present invention can explicit how to configure a parameter set for a random access channel procedure for uplink bandwidth portions other than an initially active uplink bandwidth portion.

Description

[0001] Cross-references

[0002] The present invention claims the benefit of U.S. Provisional Patent Application No. 62 / 653,015, filed April 5, 2018, entitled “RACH DESIGN FOR NEW RADIO,” and U.S. Patent Application No. 16 / 372,590, filed April 2, 2019, both of which are hereby incorporated by reference. Technical Field

[0003] The present invention generally relates to communication systems, and more particularly to a random access procedure employed by user equipment (UE). Background Art

[0004] The statements in this section merely provide background information related to the present disclosure and may not constitute prior art.

[0005] Wireless communication systems are widely deployed to provide a variety of telecommunication services, such as telephony, video, data, messaging, and broadcasting. Typical wireless communication systems employ multiple-access technologies that support communication with multiple users by sharing available system resources. Examples of such multiple-access technologies include code division multiple access (CDMA), time division multiple access (TDMA), frequency division multiple access (FDMA), orthogonal frequency division multiple access (OFDMA), single-carrier frequency division multiple access (SC-FDMA), and time division synchronous code division multiple access (TD-SCDMA).

[0006] These multiple access technologies have been applied in various telecommunication standards to provide a common protocol that enables different wireless devices to communicate at a municipal, national, regional, and even global level. An example telecommunication standard is the fifth-generation (5G) New Radio (NR). 5G NR is part of the continued evolution of mobile broadband released by the Third Generation Partnership Project (3GPP) to meet new requirements related to latency, reliability, security, scalability (for example, related to the Internet of things (IoT)) and other requirements. Some aspects of 5G NR may be based on the fourth generation (4G) long term evolution (LTE) standard. 5G NR technology still needs further improvement. These improvements may also be applicable to other multiple access technologies and the telecommunication standards that adopt these technologies. Summary of the Invention

[0007] The following presents a simplified summary of one or more aspects in order to provide a basic understanding of these aspects. This summary is not an extensive overview of all contemplated aspects and is neither intended to identify key or critical elements of all aspects nor to delineate the scope of any or all aspects. Its sole purpose is to present some concepts of one or more aspects in a simplified form as a prelude to a more detailed description that will be presented later.

[0008] In one aspect of the present invention, a method, a computer-readable medium, and an apparatus are provided. The apparatus may be a UE. The UE receives a random access response from a base station in an active downlink bandwidth part (BWP), the random access response indicating uplink resources in the active uplink bandwidth part for sending a random access message. The UE generates a random access message based on a numerology of the active uplink bandwidth part. The UE sends the random access message on uplink resources in the active uplink bandwidth part.

[0009] The method of random access channel parameter set with bandwidth part operation of the present invention can clarify how to configure the parameter set for the random access channel process for the uplink bandwidth part outside the initial active uplink bandwidth part.

[0010] To accomplish the foregoing and related ends, one or more aspects comprise the features hereinafter fully described and particularly pointed out in the claims. The detailed description and the accompanying drawings describe in detail certain illustrative features of one or more aspects. However, these features are indicative of but a few of the various ways in which the principles of the various aspects may be employed, and this description is intended to include all such aspects and their equivalents. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 is a schematic diagram illustrating an example of a wireless communication system and an access network.

[0012] Figure 2 A schematic diagram depicting a base station in an access network that communicates with a UE.

[0013] Figure 3 An example logical structure of a distributed access network is described.

[0014] Figure 4 An example physical structure of a distributed access network is described.

[0015] Figure 5 is a diagram illustrating an example of a subframe centered around a downlink (DL).

[0016] Figure 6 is a diagram illustrating an example of a subframe centered on an uplink (UL).

[0017] Figure 7 It is a schematic diagram describing the communication between a base station and a UE.

[0018] Figure 8 is a schematic diagram describing a random access procedure for a UE in a connected state.

[0019] Figure 9 FIG. 4 is a diagram illustrating a UE sending a preamble sequence in an active bandwidth portion.

[0020] Figure 10 The present invention is a flowchart of a method (process) for sending a random access message during a random access procedure.

[0021] Figure 11 is a conceptual data flow diagram illustrating the flow of data between different components / means in an exemplary apparatus.

[0022] Figure 12 is a diagram depicting an example of a hardware implementation for an apparatus employing a processing system. DETAILED DESCRIPTION

[0023] The embodiments described below in conjunction with the accompanying drawings are intended as descriptions of various configurations and are not intended to represent the only configurations that can implement the concepts described herein. The embodiments include specific details intended to provide a thorough understanding of the various concepts. However, those skilled in the art will appreciate that these concepts can be implemented without these specific details. In some instances, well-known structures and components are shown in block diagram form to avoid obscuring such concepts.

[0024] Several aspects of telecommunications systems will now be presented with reference to various apparatuses and methods. These apparatuses and methods will be described in the following detailed descriptions and illustrated in the accompanying drawings by various blocks, components, circuits, processes, algorithms, etc. (hereinafter collectively referred to as "elements"). These elements may be implemented using electronic hardware, computer software, or any combination thereof. Whether these elements are implemented in hardware or software depends on the specific application and design constraints imposed on the overall system.

[0025] By way of example, an element, or any part of an element, or any combination of elements can be implemented as a "processing system" comprising one or more processors. Examples of processors include microprocessors, microcontrollers, graphics processing units (GPUs), central processing units (CPUs), application processors, digital signal processors (DSPs), reduced instruction set computing (RISC) processors, systems on a chip (SoCs), baseband processors, field programmable gate arrays (FPGAs), programmable logic devices (PLDs), state machines, gating logic, discrete hardware circuits, and other configurations for performing the various functions of all aspects of the present invention. One or more processors in a processing system can execute software. Software should be broadly interpreted as instructions, instruction sets, codes, code segments, program codes, programs, subroutines, software components, applications, software applications, software packages, routines, subroutines, objects, executable files, execution threads, programs, functions, etc., whether referred to as software, firmware, middleware, microcode, hardware description languages, or other.

[0026] Therefore, in one or more example embodiments, the functions described may be implemented in hardware, software, or any combination thereof. If implemented in software, these functions may be stored on a computer-readable medium, or encoded as one or more instructions or codes on a computer-readable medium. Computer-readable media include computer storage media. The storage medium may be any available medium accessed by a computer. For example, but not limited to, a computer-readable medium may include random-access memory (RAM), read-only memory (ROM), electrically erasable programmable ROM (EEPROM), optical disk storage, magnetic disk storage, other magnetic storage devices, and combinations of the above-mentioned computer-readable media types, or any other medium that can be used to store computer-executable code in the form of computer-accessible instructions or data structures.

[0027] Figure 1 1 is a schematic diagram illustrating an example of a wireless communication system and access network 100. The wireless communication system (also referred to as a wireless wide area network (WWAN)) includes a base station 102, a UE 104, and a core network 160. Base stations 102 include macro cells (high-power cellular base stations) and / or small cells (low-power cellular base stations). Macro cells include base stations. Small cells include femtocells, picocells, and microcells.

[0028] Base stations 102 (collectively referred to as the Evolved Universal Mobile Telecommunications System (UMTS) terrestrial radio access network (E-UTRAN)) are connected to a core network 160 via a backhaul link 132 (e.g., an S1 interface). Base stations 102 may perform one or more of the following functions, among other things: user data delivery, radio channel encryption and decryption, integrity protection, header compression, mobility control functions (e.g., handover, dual connectivity), inter-cell interference coordination, connection establishment and release, load balancing, distribution of non-access stratum (NAS) messages, NAS node selection, synchronization, radio access network (RAN) sharing, multimedia broadcast multicast service (MBMS), subscriber and device tracking, RAN information management (RIM), paging, positioning, and warning messaging. The base stations 102 can communicate with each other via a backhaul link 134 (eg, an X2 interface) directly or indirectly (eg, via the core network 160). The backhaul link 134 can be wired or wireless.

[0029] Base stations 102 can communicate wirelessly with UEs 104. Each of base stations 102 can provide communication coverage for a corresponding geographic coverage area 110. There can be overlapping geographic coverage areas 110. For example, a small cell 102' can have a coverage area 110' that overlaps with the coverage area 110 of one or more macro base stations 102. A network that includes both small cells and macro cells can be referred to as a heterogeneous network. A heterogeneous network can also include a home evolved node B (HeNB), which can provide service to a restricted group called a closed subscriber group (CSG). The communication link 120 between base station 102 and UE 104 can include UL (also referred to as a reverse link) transmission from UE 104 to base station 102 and / or DL ​​(also referred to as a forward link) transmission from base station 102 to UE 104. The communication link 120 can use multiple-input and multiple-output (MIMO) antenna technology, which includes spatial multiplexing, beamforming and / or transmit diversity. The communication link 120 can be carried out through one or more carriers. The base station 102 / UE 104 can use a spectrum of up to Y MHz (e.g., 5, 10, 15, 20, 100 MHz) bandwidth per carrier, where the spectrum is allocated in carrier aggregation of up to Yx MHz (x component carriers) for transmission in each direction. The carriers may or may not be adjacent to each other. The allocation of carriers with respect to DL and UL can be asymmetric (e.g., more or fewer carriers can be allocated for DL ​​than for UL). The component carriers can include a primary component carrier and one or more secondary component carriers. The primary component carrier can be called a primary cell (PCell) and the secondary component carrier can be called a secondary cell (SCell).

[0030] The wireless communication system further includes a wireless fidelity (Wi-Fi) access point (AP) 150 that communicates with a Wi-Fi station (STA) 152 in the 5 GHz unlicensed spectrum via a communication link 154. When communicating in the unlicensed spectrum, the STA 152 / AP 150 may perform a clear channel assessment (CCA) to determine whether the channel is available before communicating.

[0031] Small cell 102' can operate in licensed and / or unlicensed spectrum. When operating in the unlicensed spectrum, small cell 102' can employ NR and use the same 5 GHz unlicensed spectrum used by Wi-Fi AP 150. Small cell 102' employing NR in the unlicensed spectrum can improve access network coverage and / or increase access network capacity.

[0032] Next-generation Node-B (gNodeB or gNB) 180 can operate at millimeter wave (mmW) frequencies and / or near-mmW frequencies to communicate with UE 104. When gNB 180 operates at mmW or near-mmW frequencies, gNB 180 may be referred to as a mmW base station. Extremely high frequency (EHF) is part of the radio frequency (RF) portion of the electromagnetic spectrum. EHF has a range of 30 GHz to 300 GHz and a wavelength between 1 mm and 10 mm. Radio waves in this frequency band may be referred to as millimeter waves. Near-mmW can extend down to 3 GHz frequencies and has a wavelength of 100 mm. The super high frequency (SHF) band ranges from 3 GHz to 30 GHz and is also known as centimeter waves. Communications using the mmW / near-mmW RF bands have extremely high path loss and a shorter range. Beamforming 184 may be used between the gNB 180 and the UE 104 to compensate for the extremely high path loss and shorter range.

[0033] The core network 160 includes a mobility management entity (MME) 162, other MMEs 164, a serving gateway 166, an MBMS gateway (GW) 168, a broadcast multicast service center (BM-SC) 170, and a packet data network (PDN) gateway 172. The MME 162 can communicate with a home subscriber server (HSS) 174. The MME 162 is a control node that handles signaling between the UE 104 and the core network 160. Generally speaking, the MME 162 provides bearer and connection management. All user Internet protocol (IP) packets are passed through the serving gateway 166, which is itself connected to the PDN gateway 172. The PDN gateway 172 provides UE IP address allocation and other functions. The PDN gateway 172 and the BM-SC 170 are connected to the PDN 176. The PDN 176 may include the Internet, an intranet, an IP multimedia subsystem (IMS), packet-switched streaming services, and / or other IP services. The BM-SC 170 may provide functionality for the provisioning and delivery of MBMS user services. The BM-SC 170 may serve as the entry point for content providers' MBMS transmissions, may be used to authorize and initiate MBMS bearer services in the public land mobile network (PLMN), and may be used to schedule MBMS transmissions. The MBMS GW 168 may be used to distribute MBMS traffic to base stations 102 belonging to a multicast broadcast single frequency network (MBSFN) area that broadcasts a specific service, and is responsible for session management (start / stop) and collecting billing information related to evolved MBMS (eMBMS).

[0034] A base station may also be referred to as a gNB, Node B, evolved Node-B (eNB), AP, base transceiver station, radio base station, radio transceiver, transceiver functionality, basic service set (BSS), extended service set (ESS), or other appropriate terminology. Base station 102 provides an access point to core network 160 for UE 104. Examples of UE 104 include a mobile phone, smartphone, Session Initiation Protocol (SIP) phone, laptop, personal digital assistant (PDA), satellite radio, global positioning system, multimedia device, video device, digital audio player (e.g., MP3 player), camera, game console, tablet computer, smart device, wearable device, car, electric meter, gas pump, oven, or any other similarly functional device. Some UEs 104 may also be referred to as IoT devices (e.g., parking meter, gas pump, oven, car, etc.). UE 104 may also be referred to as a station, mobile station, user station, mobile unit, user unit, wireless unit, remote unit, mobile device, wireless device, wireless communication device, remote device, mobile user station, access terminal, mobile terminal, wireless terminal, remote terminal, handset, user agent, mobile client, client, or other suitable terminology.

[0035] Figure 22 is a block diagram illustrating a base station 210 in an access network communicating with a UE 250. In the DL, IP packets from the core network 160 may be provided to a controller / processor 275. The controller / processor 275 implements Layer 3 and Layer 2 functions. Layer 3 includes the radio resource control (RRC) layer, and Layer 2 includes the packet data convergence protocol (PDCP) layer, the radio link control (RLC) layer, and the medium access control (MAC) layer. The controller / processor 275 provides RRC layer functions, PDCP layer functions, RLC layer functions, and MAC layer functions, wherein the RRC layer functions are associated with system information (e.g., master information block (MIB), system information block (SIB)) broadcast, RRC connection control (e.g., RRC connection paging, RRC connection establishment, RRC connection modification, and RRC connection release), inter-Radio Access Technology (RAT) mobility, and measurement configuration for UE measurement reporting; wherein the PDCP layer functions are associated with header compression / decompression, security (ciphering, deciphering, integrity protection, integrity verification), and handover support functions; wherein the RLC layer functions are associated with delivery of upper layer packet data units (PDUs), error correction through automatic repeat request (ARQ), concatenation, segmentation, and reassembly of RLC service data units (SDUs), resegmentation of RLC data PDUs, and reordering of RLC data PDUs; wherein the MAC layer functions are associated with mapping between logical channels and transport channels, MAC Multiplexing of SDUs to transport blocks (TBs), demultiplexing of TBs to MAC SDUs, scheduling information reporting, error correction through hybrid automatic repeat request (HARQ), priority processing, and logical channel priority are associated.

[0036] The transmit (TX) processor 216 and the receive (RX) processor 270 implement layer 1 functions associated with various signal processing functions. Layer 1 (including the physical (PHY) layer) can include error detection on the transmission channel, forward error correction (FEC) encoding / decoding of the transmission channel, interleaving, rate matching, mapping on the physical channel, modulation / demodulation of the physical channel, and MIMO antenna processing. The TX processor 216 processes the mapping to the signal constellation based on various modulation schemes (e.g., binary phase-shift keying (BPSK), quadrature phase-shift keying (QPSK), M-phase-shift keying (M-PSK), M-quadrature amplitude modulation (M-QAM)). The coded and modulated symbols can then be separated into parallel streams. Each stream can then be mapped to an Orthogonal Frequency Division Multiplexing (OFDM) subcarrier, multiplexed with a reference signal (e.g., a pilot) in the time domain and / or frequency domain, and then combined using an inverse fast Fourier transform (IFFT) to produce a physical channel that carries a time-domain OFDM symbol stream. The OFDM stream is spatially precoded to produce multiple spatial streams. The channel estimate from the channel estimator 274 can be used to determine the coding and modulation scheme, as well as for spatial processing. The channel estimate can be derived from a reference signal and / or channel state feedback sent by the UE 250. Each spatial stream can then be provided to a different antenna 220 via a separate transceiver 218 (the transceiver 218 includes an RX and a TX). Each transceiver 218 can modulate an RF carrier using its own spatial stream for transmission.

[0037] At the UE 250, each transceiver 254 (including both RX and TX) receives signals via its respective antenna 252. Each transceiver 254 recovers the information modulated onto the RF carrier and provides this information to the RX processor 256. The TX processor 268 and the RX processor 256 implement Layer 1 functions associated with various signal processing functions. The RX processor 256 can perform spatial processing on the information to recover any spatial streams to be transmitted to the UE 250. If there are multiple spatial streams to be transmitted to the UE 250, the RX processor 256 combines the multiple spatial streams into a single OFDM symbol stream. The RX processor 256 then uses a fast Fourier transform (FFT) to transform the OFDM symbol stream from the time domain to the frequency domain. The frequency domain signal includes a separate OFDM symbol stream for each subcarrier of the OFDM signal. The symbols and reference signals on each subcarrier are recovered and demodulated by determining the signal constellation most likely transmitted by the base station 210. These soft decisions can be based on the channel estimates calculated by the channel estimator 258. The soft decisions are then decoded and deinterleaved to recover the data and control signals originally sent on the physical channel by base station 210. The data and control signals are then provided to controller / processor 259, which performs Layer 3 and Layer 2 functions.

[0038] The controller / processor 259 may be associated with a memory 260 that stores program codes and data. The memory 260 may be referred to as a computer-readable medium. In the UL, the controller / processor 259 provides demultiplexing between transport and logical channels, packet reassembly, decryption, header decompression, and control signal processing to recover IP packets from the core network 160. The controller / processor 259 is also responsible for error detection using an acknowledgment (ACK) and / or negative acknowledgment (NACK) protocol to support HARQ operations.

[0039] Similar to the functional description of DL transmission through the base station 210, the controller / processor 259 provides RRC layer functions, PDCP layer functions, RLC layer functions and MAC layer functions, wherein the RRC layer functions are associated with system information (e.g., MIB, SIB) acquisition, RRC connection, and measurement reporting; the PDCP layer functions are associated with header compression / decompression, and security (encryption, decryption, integrity protection, integrity verification); the RLC layer functions are associated with the delivery of upper layer PDUs, error correction through ARQ, concatenation, segmentation and reassembly of RLC SDUs, and reordering of RLC data PDUs; the MAC layer functions are associated with mapping between logical channels and transport channels, multiplexing of MAC SDUs to TBs, demultiplexing of TBs to MAC SDUs, scheduling information reporting, error correction through HARQ, priority processing, and logical channel priority.

[0040] The channel estimate derived by the channel estimator 258 is derived from a reference signal or feedback transmitted by the base station 210 and can be used by the TX processor 268 to select an appropriate coding and modulation scheme and to facilitate spatial processing. The spatial streams generated by the TX processor 268 can be provided to different antennas 252 via separate transceivers 254. Each transceiver 254 can modulate an RF carrier for transmission using a corresponding spatial stream. The base station 210 processes UL transmissions in a manner similar to that described for the receiver functionality at the UE 250. Each transceiver 218 receives a signal via a corresponding antenna 220. Each transceiver 218 recovers the information modulated onto the RF carrier and provides this information to the RX processor 270.

[0041] The controller / processor 275 may be associated with a memory 276 that stores program codes and data. The memory 276 may be referred to as a computer-readable medium. In the UL, the controller / processor 275 provides demultiplexing between transport and logical channels, packet reassembly, decryption, header decompression, and control signal processing to recover IP packets from the UE 250. The IP packets from the controller / processor 275 may be provided to the core network 160. The controller / processor 275 is also responsible for error detection using ACK and / or NACK protocols to support HARQ operations.

[0042] NR refers to a radio configured to operate according to a new air interface (e.g., in addition to an OFDMA-based air interface) or a fixed transport layer (e.g., other than IP). NR may use OFDM with a cyclic prefix (CP) in both the UL and DL and include support for half-duplex operation using time division duplexing (TDD). NR may include mission-critical features such as enhanced mobile broadband (eMBB) services for wide bandwidths (e.g., over 80 MHz), mmW for high carrier frequencies (e.g., 60 GHz), massive MTC (mMTC) for non-backward-compatible machine type communication (MTC) technologies, and / or ultra-reliable low latency communication (URLLC) services.

[0043] A single component carrier with a bandwidth of 100 MHz can be supported. In one example, an NR resource block (RB) can span 12 subcarriers with a subcarrier bandwidth of 60 kHz and a duration of 0.125 ms, or a subcarrier bandwidth of 15 kHz and a duration of 0.5 ms. Each radio frame can include 20 or 80 subframes (or NR time slots) of length 10 ms. Each subframe can indicate the link direction (i.e., DL or UL) used for data transmission, and the link direction of each subframe can be switched dynamically. Each subframe can include DL / UL data and DL / UL control data. The UL and DL subframes of NR can be in the following Figure 5 and Figure 6 Detailed description is given in .

[0044] The NR RAN may include a central unit (CU) and a distributed unit (DU). A NR base station (BS) (e.g., gNB, 5G Node B, Node B, transmission reception point (TRP), AP) may correspond to one or more BSs. An NR cell may be configured as an access cell (ACell) or a data-only cell (DCell). For example, the RAN (e.g., CU or DU) may configure the cell. A DCell may be a cell for carrier aggregation or dual connectivity and is not used for initial access, cell selection / reselection, or handover. In some cases, the Dcell does not send a synchronization signal (SS). In some cases, the DCell sends an SS. The NR BS may send a DL signal indicating the cell type to the UE. Based on the cell type indication, the UE may communicate with the NR BS. For example, the UE may determine an NR BS based on the indicated cell type to consider for cell selection, access, handover, and / or measurement.

[0045] Figure 3 An example logical structure of a distributed RAN 300 is described according to various aspects of the present invention. A 5G access node 306 includes an access node controller (ANC) 302. The ANC can be the CU of the distributed RAN 300. The backhaul interface to the next generation core network (NG-CN) 304 can terminate at the ANC. The backhaul interface to the adjacent next generation access node (NG-AN) can terminate at the ANC. The ANC includes one or more TRPs 308 (also referred to as BS, NR BS, Node B, 5G NB, AP or some other terminology). As mentioned above, TRP can be used interchangeably with "cell".

[0046] The TRP 308 may be a DU. The TRP may be connected to one ANC (ANC 302) or more than one ANC (not shown). For example, for RAN sharing, radio as a service (RaaS), and service-specific ANC deployments, the TRP may be connected to more than one ANC. The TRP includes one or more antenna ports. The TRP may be configured to serve traffic to the UE independently (e.g., dynamically selected) or jointly (e.g., for joint transmission).

[0047] The local structure of the distributed RAN 300 can be used to describe the fronthaul definition. A structure that supports fronthaul solutions across different deployment types can be defined. For example, the structure can be based on transmit network performance (e.g., bandwidth, latency, and / or jitter). This structure can share features and / or components with LTE. According to various aspects, the NG-AN 310 can support dual connectivity with NR. The NG-AN can share common fronthaul for LTE and NR.

[0048] This structure can enable collaboration between TRPs 308. For example, collaboration can be preset within a TRP and / or across TRPs via ANC 302. According to various aspects, an interface between TRPs may not be needed / existent.

[0049] According to various aspects, dynamic configuration of separate logical functions can exist within the distributed RAN 300 architecture. PDCP, RLC, MAC protocols can be adaptively placed in the ANC or TRP.

[0050] Figure 4 An example physical structure of a distributed RAN 400 is described according to various aspects of the present invention. A centralized core network unit (C-CU) 402 can assume core network functions. The C-CU can be centrally deployed. C-CU functions can be offloaded (e.g., to an advanced wireless service (AWS)) to handle peak capacity. A centralized RAN unit (C-RU) 404 can assume one or more ANC functions. Optionally, the C-RU can assume core network functions locally. The C-RU can be deployed in a distributed manner. The C-RU can be closer to the network edge. The DU 406 can assume one or more TRPs. The DU can be located at the network edge with RF functions.

[0051] Figure 5 5 is a diagram illustrating an example of a DL-centric subframe. The DL-centric subframe includes a control portion 502. The control portion 502 may be present at the beginning or start of the DL-centric subframe. The control portion 502 includes various scheduling information and / or control information corresponding to various portions of the DL-centric subframe. In some configurations, the control portion 502 may be a physical downlink control channel (PDCCH), such as Figure 5As shown. The DL-centric subframe also includes a DL data portion 504. The DL data portion 504 is sometimes referred to as the payload of the DL-centric subframe. The DL data portion 504 includes communication resources used for communication from the scheduling entity (e.g., UE or BS) to the subordinate entity (e.g., UE). In some configurations, the DL data portion 504 can be a physical downlink shared channel (PDSCH).

[0052] The DL-centric subframe also includes a common UL portion 506. The common UL portion 506 is sometimes referred to as a UL burst, a common UL burst, and / or various other suitable terms. The common UL portion 506 includes feedback information corresponding to various other portions of the DL-centric subframe. For example, the common UL portion 506 includes feedback information corresponding to the control portion 502. Non-limiting examples of feedback information include ACK signals, NACK signals, HARQ indications, and / or various other suitable types of information. The common UL portion 506 includes additional or optional information, such as information related to random access channel (RACH) procedures, scheduling requests (SRs), and various other suitable types of information.

[0053] like Figure 5 As shown, the end of the DL data portion 504 can be separated in time from the beginning of the common UL portion 506. This time separation may sometimes be referred to as a gap, a guard period, a guard interval, and / or other suitable terminology. This separation provides time for switching from DL communications (e.g., reception operations by a subordinate entity (e.g., a UE)) to UL communications (e.g., transmissions by a subordinate entity (e.g., a UE)). Those skilled in the art will appreciate that the above are merely examples of DL-centric subframes, and that alternative structures with similar features may exist without necessarily detracting from the aspects described herein.

[0054] Figure 6 6 is a diagram illustrating an example of a UL-centric subframe 600. The UL-centric subframe includes a control portion 602. The control portion 602 may be present at the beginning or start of the UL-centric subframe. Figure 6 The control portion 602 may be associated with a reference Figure 5The control portion 502 is similar. The UL-centric subframe also includes a UL data portion 604. The UL data portion 604 may sometimes be referred to as the payload of the UL-centric subframe. The UL portion may refer to the communication resources used for communication from a lower-level entity (e.g., a UE) to a scheduling entity (e.g., a UE or a base station). In some configurations, the control portion 602 may be a PDCCH.

[0055] like Figure 6 As shown, the end of the control portion 602 can be separated in time from the beginning of the common UL data portion 604. This time separation may sometimes be referred to as an interval, a guard period, a guard interval, and / or other suitable terminology. This separation provides time for switching from DL communications (e.g., reception operations of the scheduling entity) to UL communications (e.g., transmissions of the scheduling entity). The UL-centric subframe also includes a common UL portion 606. Figure 6 The public UL portion 606 may be referenced with Figure 6 The common UL portion 606 is similar to the common UL portion 606. The common UL portion 606 may additionally or additionally include information regarding a channel quality indicator (CQI), SRS, and various other suitable types of information. Those skilled in the art will appreciate that the above are merely examples of DL-centric subframes, and that alternative structures with similar features may exist without necessarily detracting from the aspects described herein.

[0056] In some cases, two or more subordinate entities (e.g., UEs) can communicate with each other using sidelink signals. Practical applications of such sidelink communications include public safety, proximity services, UE-to-network relaying, vehicle-to-vehicle (V2V) communications, Internet of Everything (IoE) communications, IoT communications, mission-critical meshes, and / or various other suitable applications. Generally speaking, a sidelink signal can refer to a signal that is communicated from one subordinate entity (e.g., UE 1) to another subordinate entity (e.g., UE 2) without relaying the communication through a scheduling entity (e.g., UE or BS), even though the scheduling entity can be used for scheduling and / or control purposes. In some examples, sidelink signals can be communicated using licensed spectrum (unlike wireless local area networks that typically use unlicensed spectrum).

[0057] Figure 77 is a diagram 700 illustrating communication between a base station 702 and a UE 704. The base station 702 may operate antenna ports 722-1 to 722-N. The base station 702 may provide transmit beams 726-1 to 726-N in different directions. The UE 704 may use a random access procedure to obtain access to the cell of the base station 702. In this example, to facilitate the UE to perform the random access procedure, the base station 702 transmits a set of synchronization signal blocks (SSBs) (including SSBs 732-1 to 732-N), where the SSBs are associated with the transmit beams 726-1 to 726-N, respectively. More specifically, the primary synchronization signal (PSS) and the secondary synchronization signal (SSS) and the physical broadcast channel (PBCH) are collectively referred to as SSBs. Each of the SSBs 732-1 to 732-N may include one or more demodulation reference signals (DMRS) of the PBCH. DMRS is used for channel estimation at the UE as part of coherent demodulation.

[0058] In addition, base station 702 transmits channel state information (CSI)-reference signal (RS) sets 734-1 to 734-N specific to UE 704 using transmit-side beams 726-1 to 726-N, respectively. The UE uses the CSI-RS to estimate the channel and report the CSI to the base station. The CSI-RS is configured on a per-device basis.

[0059] In some configurations, the UE 704 may randomly or based on a rule select one of the transmit beams 726-1 to 726-N for deriving a corresponding preamble sequence for use in a random access procedure. In some configurations, the UE 704 may adjust the direction of the receive beam 728 to detect and measure the SSBs 732-1 to 732-N or the CSI-RS sets 734-1 to 734-N. Based on the direction and / or measurement (e.g., signal-to-noise ratio (SNR) measurement) results, the UE 704 may select the direction of one of the receive beam 728 and the transmit beam 726-1 to 726-N for deriving a corresponding preamble sequence for use in a random access procedure.

[0060] In one example, the UE 704 may select the transmit side beam 726-2 for deriving a relevant preamble sequence for use in a random access procedure. More specifically, the UE 704 is configured with one or more random access resources, where the random access resources are associated with each SSB 732-1 to 732-N and / or associated with each CSI-RS set 734-1 to 734-N.

[0061] Therefore, the UE 704 can select a random access resource associated with a DL reference signal (e.g., SSB or CSI-RS) of the transmit beam 726-2 (i.e., a selected one of the transmit beams 726-1 to 726-N). Subsequently, the UE 704 transmits a preamble sequence 752 to the base station 702 via the receive beam 728 (assuming that the corresponding UE transmit beam can be derived from the receive beam 728) on the selected random access resource. Based on the location of the random access resource in the time and frequency domains, the base station 702 can determine the transmit beam selected by the UE 704.

[0062] Subsequently, the base station 702 and the UE 704 may further complete a random access procedure, so that the base station 702 and the UE 704 can communicate via the transmit beam 726-2 and the receive beam 728. In this way, the UE 704 is in a connected state (e.g., RRC connection) with the base station 702. The base station 702 may use the transmit beam 726-2 to send a PDCCH 742, a PDSCH 744, and related DMRS 746 to the UE 704.

[0063] Figure 8 800 is a diagram illustrating a random access procedure for a UE in a connected state. In some cases, despite being in a connected state, the UE 704 still needs to perform a random access procedure with the base station 702 or another base station. In this example, as described above with reference to Figure 7 UE 704 connects to base station 702. UE 704 may receive a request (e.g., a PDCCH command) from base station 702 to re-initiate a random access procedure. UE 704 may detect the arrival of uplink data without performing uplink synchronization, and thus may perform a random access procedure with base station 702. UE 704 may detect the arrival of downlink data without performing uplink synchronization, and thus may perform a random access procedure with base station 702. UE 704 may decide to resume the beam, and thus may perform a random access procedure with base station 702. UE 704 may be handed over from base station 702 to another base station, and thus may perform a random access procedure with the other base station.

[0064] In this example, at process 802, base station 702 sends a PDCCH command to UE 704. Specifically, the PDCCH command may be sent using transmit beam 726-2. Therefore, upon receiving the PDCCH command, at process 803, UE 704 initiates a random access procedure while in connected mode. In another example, UE 704 may detect a beam failure and internally generate a beam failure recovery request. Thus, UE 704 may also initiate a random access procedure while in connected mode. At process 804, as described above, base station 702 transmits SSBs 732-1 to 732-N and / or CSI-RS sets 734-1 to 734-N associated with transmit beams 726-1 to 726-N, respectively. UE 704 may detect some or all of SSBs 732-1 to 732-N. Note that process 804 may also occur before process 802.

[0065] At process 806, as described above, in some configurations, the UE 704 may select one of the transmit beams 726-1 to 726-N randomly or based on measurement results. For example, the base station 702 may select the transmit beam 726-1 for deriving the associated preamble sequence 752 used in the random access procedure.

[0066] Therefore, at process 808, base station 702 can use the corresponding beam of transmit-side beam 726-2 to receive preamble sequence 752, which is transmitted on the random access resource associated with the downlink reference signal of transmit-side beam 726-1. UE 704 determines the timing advance (TA) of UE 704 based on preamble sequence 752 received through transmit-side beam 726-2.

[0067] In this case, base station 702 can receive preamble sequence 752 on transmit beam 726-2. The network of base station 702 can also determine that preamble sequence 752 is transmitted on random access resources associated with SSB 732-2 and / or CSI-RS set 734-2 of transmit beam 726-2. In this way, the network can know that UE 704 selected transmit beam 726-2.

[0068] At process 810, the base station 702 (under the control of the network) generates a random access response (RAR), which includes information such as the preamble code sequence 752 detected by the network and to which the response is valid, the TA calculated by the network based on the reception timing of the preamble code sequence, the scheduling grant indicating the resources used by the UE 704 for subsequent message transmission, and / or a temporary identifier for further communication between the device and the network, a temporary cell radio network temporary identifier (TC-RNTI), etc.

[0069] At process 812, the base station 702 sends a PDCCH scheduling command for scheduling RAR transmission by using the transmit side beam 726-2. Therefore, the DMRS of the PDCCH scheduling command and the DMRS of the PDCCH order are quasi-colocated. In addition, the PDCCH scheduling command can be scrambled by the cell radio network temporary identifier (C-RNTI) of the UE 704 known to the network. In addition, as described above, the UE 704 is in a connected state. The serving beam from the base station 702 to the UE 704 can be the transmit side beam 726-1. At or approximately when the base station 702 sends the PDCCH scheduling command for scheduling RAR transmission on the transmit side beam 726-2, the base station 702 can also send a PDCCH for scheduling the PDSCH carrying user data on the transmit side beam 726-1.

[0070] At process 814, base station 702 transmits a RAR to UE 704 on transmit-side beam 726-2. The RAR may be sent in a conventional downlink PDSCH. After process 814, the uplink of UE 704 is time-synchronized. However, before user data can be sent to / from UE 704, a cell-unique identifier (C-RNTI) must be assigned to UE 704 (unless UE 704 has already been assigned a C-RNTI). Depending on the device state, additional message exchanges may be required to establish the connection.

[0071] Subsequently, at process 822, UE 704 transmits a random access message to base station 702 using the uplink shared channel (UL-SCH) resources allocated in the random access response at process 814. An important part of the random access message is the inclusion of a device identifier. If UE 704 is already known to base station 702 and the network, i.e., in the RRC connected (RRC_CONNECTED) or RRC inactive (RRC_INACTIVE) state, the allocated C-RNTI is used as the device identifier.

[0072] At process 824, base station 702 sends a random access message (message 4) to UE 704. If UE 704 has been assigned a C-RNTI, base station 702 uses the C-RNTI to address UE 704 on the PDCCH that schedules the random access message. Upon detecting the C-RNTI on the PDCCH, UE 704 declares the random access attempt successful and does not require contention resolution information for the downlink shared channel (DL-SCH). Because the C-RNTI is unique to each device, unintended devices will ignore the PDCCH transmission.

[0073] When UE 704 does not have a valid C-RNTI, base station 702 addresses a random access message, and the associated DL-SCH contains a random access message using C-RNTI (resolution message). The device compares the identifier in the message with the identifier sent in step 3.

[0074] Figure 9 Schematic diagram 900 illustrates UE 704 transmitting a preamble sequence in an active bandwidth portion of UE 704. In this example, UE 704 initially connects to base station 702 in bandwidth portion 984 (initial active bandwidth portion). Subsequently, base station 702 configures UE 704 to switch to bandwidth portion 982. Specifically, base station 702 transmits a bandwidth portion configuration to UE 704 via dedicated signaling to configure bandwidth portion 982. The bandwidth portion configuration includes uplink and downlink parameters, as well as common and dedicated parameters. The common parameters include BWP-UplinkCommon and BWP-DownlinkCommon.

[0075] When the UE 704 operates in the bandwidth portion 982, the UE 704 receives the PDCCH command 922 (e.g. Figure 8 802 described above). Thus, UE 704 may transmit preamble sequence 752 in bandwidth portion 984 (as in process 808). Base station 702 transmits RAR 932 to UE 704 (as in process 814).

[0076] UE 704 may decide to send a random access message 936 (as described in process 822). During preparation of random access message 936, UE 704 may need to determine a parameter set for generating and sending random access message 936. In some configurations, UE 704 may use the parameter set for bandwidth portion 982 as the parameter set for sending random access message 936. For example, UE 704 may determine the subcarrier spacing of random access message 936 based on SubcarrierSpacing or UL-BWP-mu in the BWP-UplinkCommon parameter. UE 704 may determine the CP length of random access message 936 based on UL-BWP-cp in the BWP-UplinkCommon parameter. Thus, UE 704 may prepare and send random access message 936 using the determined subcarrier spacing and CP length.

[0077] In the above example, bandwidth portion 982 and bandwidth portion 984 can each be an uplink bandwidth portion and a downlink bandwidth portion. In another example, UE 704 operates separate active uplink bandwidth portion 972 and downlink bandwidth portion 974 that are different from the initial uplink bandwidth portion and the initial active downlink bandwidth portion, respectively. In this second example, preamble sequence 752 and random access message 936 are transmitted in uplink bandwidth portion 972, and RAR 932 is transmitted in downlink bandwidth portion 974.

[0078] Figure 10 1000 is a flow chart of a method (process) for sending a random access message during a random access procedure. The method may be performed by a UE (e.g., UE 704, apparatus 1102, and apparatus 1102'). At operation 1002, the UE receives a control message from a base station. The control message includes one or more configurations of a parameter set defining an active uplink bandwidth portion. At operation 1004, when the UE is in a connected state before receiving a random access response, the UE sends a preamble sequence to the base station in the active uplink bandwidth portion.

[0079] At operation 1006, the UE receives a random access response from the base station in the active downlink bandwidth portion, the random access response indicating uplink resources in the active uplink bandwidth portion for transmitting the random access message. At operation 1008, the UE determines a parameter set for the active uplink bandwidth portion based on one or more configurations received from the base station.

[0080] At operation 1010, the UE generates a random access message based on a parameter set of the active uplink bandwidth portion.At operation 1012, the UE sends the random access message on uplink resources of the active uplink bandwidth portion.

[0081] In some configurations, the active uplink bandwidth portion is different from the initial uplink bandwidth portion configured for the UE. In some configurations, the active uplink bandwidth portion is the same as the initial uplink bandwidth portion configured for the UE.

[0082] In some configurations, the active uplink bandwidth portion is the same as the active downlink bandwidth portion, the initial uplink bandwidth portion on which the UE resides is the same as the initial downlink bandwidth portion, and the active uplink bandwidth portion is different from the initial downlink bandwidth portion.

[0083] In some configurations, the parameter set defines the subcarrier spacing for the active uplink bandwidth portion. In some configurations, the parameter set defines the subcarrier spacing and cyclic prefix for the active uplink bandwidth portion. In some configurations, the parameter set defines the cyclic prefix for the active uplink bandwidth portion.

[0084] Figure 11 1 is a conceptual data flow diagram 1100 illustrating the data flow between different components / means in an exemplary apparatus 1102. The apparatus 1102 may be a UE. The apparatus 1102 includes a receiving component 1104, a random access (RA) component 1108, a bandwidth part (BWP) component 1112, and a transmitting component 1110.

[0085] Bandwidth portion component 1112 receives a control message from base station 1150. The control message includes one or more configurations defining a parameter set for the active uplink bandwidth portion. Bandwidth portion component 1112 determines the parameter set for the active uplink bandwidth portion based on the one or more configurations. When the UE is in a connected state before receiving a random access response, random access component 1108 transmits a preamble sequence to the base station in the active uplink bandwidth portion.

[0086] The random access component 1108 receives a random access response from the base station in the active downlink bandwidth portion, the random access response indicating uplink resources in the active uplink bandwidth portion for sending the random access message.

[0087] The random access component 1108 generates a random access message based on the parameter set of the active uplink bandwidth portion.The random access component 1108 sends the random access message on uplink resources of the active uplink bandwidth portion.

[0088] In some configurations, the active uplink bandwidth portion is different from the initial uplink bandwidth portion configured for the UE. In some configurations, the active uplink bandwidth portion is the same as the initial uplink bandwidth portion configured for the UE.

[0089] In some configurations, the active uplink bandwidth portion is the same as the active downlink bandwidth portion, the initial uplink bandwidth portion on which the UE resides is the same as the initial downlink bandwidth portion, and the active uplink bandwidth portion is different from the initial downlink bandwidth portion.

[0090] In some configurations, the parameter set defines the subcarrier spacing for the active uplink bandwidth portion. In some configurations, the parameter set defines the subcarrier spacing and cyclic prefix for the active uplink bandwidth portion. In some configurations, the parameter set defines the cyclic prefix for the active uplink bandwidth portion.

[0091] Figure 12 1 is a schematic diagram 1200 illustrating an example of a hardware implementation for an apparatus 1102′ employing a processing system 1214. Apparatus 1102′ may be a UE. Processing system 1214 may implement a bus architecture, generally represented by bus 1224. Depending on the specific application and overall design constraints of processing system 1214, bus 1224 may include any number of interconnected buses and bridges. Bus 1224 links together various circuits including one or more processors and / or hardware components, represented by one or more processors 1204, receiving component 1104, random access component 1108, transmitting component 1110, bandwidth portion component 1112, and computer-readable medium / memory 1206. Bus 1224 may also link various other circuits, such as timing sources, external devices, voltage regulators, and power management circuits.

[0092] The processing system 1214 may be coupled to a transceiver 1210, which may be one or more of the transceivers 254. The transceiver 1210 may be coupled to one or more antennas 1220, which may be the communication antennas 252.

[0093] The transceiver 1210 provides a means for communicating with various other devices via a transmission medium. The transceiver 1210 receives signals from one or more antennas 1220, extracts information from the received signals, and provides the extracted information to the processing system 1214 (particularly the receiving component 1104). In addition, the transceiver 1210 receives information from the processing system 1214 (particularly the transmitting component 1110) and generates signals based on the received information for application to one or more antennas 1220.

[0094] Processing system 1214 includes one or more processors 1204 coupled to computer-readable media / memory 1206. The one or more processors 1204 are responsible for overall processing, including executing software stored on computer-readable media / memory 1206. When executed by the one or more processors 1204, the software enables processing system 1214 to perform the various functions of any of the specific devices described above. The computer-readable media / memory 1206 may also be used to store data that is manipulated by the one or more processors 1204 when executing the software. Processing system 1214 also includes at least one of a receiving component 1104, a random access component 1108, a transmitting component 1110, and a bandwidth fraction component 1112. These components may be software components running on the one or more processors 1204, resident / stored in the computer-readable media / memory 1206, one or more hardware components coupled to the one or more processors 1204, or a combination of these components. The processing system 1214 may be a component of the UE 250 and include the memory 260 and / or at least one of the TX processor 268 , the RX processor 256 , and the communication processor 259 .

[0095] In one configuration, the apparatus 1102 / apparatus 1102′ for wireless communication includes a method for performing Figure 8 The above-mentioned means may be that one or more components of the processing system 1214 of the apparatus 1102 and / or the apparatus 1102' are configured to perform the functions described in the above-mentioned means.

[0096] As described above, the processing system 1214 includes the TX processor 268, the RX processor 256, and the communication processor 259. Likewise, in one configuration, the aforementioned means may be such that the TX processor 268, the RX processor 256, and the communication processor 259 are configured to perform the functions described above.

[0097] It should be understood that the specific order or hierarchy of steps in the disclosed processes / flowcharts is illustrative of exemplary methods. It should be understood that the specific order or hierarchy of steps in the processes / flowcharts may be rearranged based on design preferences. In addition, some steps may be further combined or omitted. The accompanying methods claim elements of the various steps presented in an exemplary order, but this does not mean that the present invention is limited to the specific order or hierarchy presented.

[0098] The foregoing description is provided to enable those skilled in the art to practice the various aspects described herein. Various modifications to these aspects will be readily apparent to those skilled in the art, and the general principles defined herein may also be applied to other aspects. Accordingly, the claims are not intended to be limited to the aspects illustrated herein, but rather to the full scope consistent with the language of the claims. In the claims, unless otherwise stated, references to elements in the singular are not intended to mean "one and only one," but rather "one or more." The term "exemplary" is used herein to mean "serving as an example, instance, or illustration." Any aspect described as "exemplary" is not necessarily preferred or advantageous over other aspects. Unless otherwise specified, the term "some" refers to one or more. Combinations such as "at least one of A, B, or C," "one or more of A, B, or C," "at least one of A, B, and C," "one or more of A, B, and C," and "A, B, C, or any combination thereof" include any combination of A, B, and / or C, and may include multiple A's, multiple B's, or multiple C's. Specifically, combinations such as "at least one of A, B, or C," "one or more of A, B, or C," "at least one of A, B, and C," "one or more of A, B, and C," and "A, B, C, or any combination thereof" may be only A, only B, only C, A and B, A and C, B and C, or A and B and C, wherein any such combination may include one or more members of A, B, or C. All structural and functional equivalents to the elements of the various aspects described in this disclosure that are known or subsequently become known to those skilled in the art are expressly incorporated herein by reference and are intended to be encompassed by the claims. In addition, regardless of whether the invention is expressly recited in the claims, the disclosure of this disclosure is not intended to be dedicated to the public. The words "module," "mechanism," "component," "device," and the like are not substitutes for the term "means." Therefore, unless an element in a claim is explicitly stated using the phrase "means for...", the element should not be understood as functionally limited.

Claims

1. A method for random access channel parameter set of user equipment, characterized in that: include: receiving a random access response from a base station in an active downlink bandwidth portion, the random access response indicating uplink resources in an active uplink bandwidth portion for sending the random access message, wherein the active uplink bandwidth portion is different from an initial uplink bandwidth portion configured for the user equipment; generating the random access message based on a parameter set of the active uplink bandwidth portion; as well as The random access message is sent on the uplink resources of the active uplink bandwidth portion.

2. The method for random access channel parameter set according to claim 1, characterized in that: The active uplink bandwidth portion is the same as the active downlink bandwidth portion, the initial uplink bandwidth portion where the user equipment resides is the same as the initial downlink bandwidth portion, and the active uplink bandwidth portion is different from the initial downlink bandwidth portion.

3. The method for random access channel parameter set according to claim 1, further comprising: When the user equipment is in a connected state before receiving the random access response, a preamble sequence is sent to the base station in the active uplink bandwidth portion.

4. The method for random access channel parameter set according to claim 1, further comprising: The parameter set for the active uplink bandwidth is determined based on receiving one or more configurations from the base station.

5. The method for random access channel parameter set according to claim 4, further comprising: A control message is received from the base station, the control message including the one or more configurations defining the parameter set for the active uplink bandwidth portion.

6. The method for random access channel parameter set according to claim 4, characterized in that: This parameter set defines the subcarrier spacing of the active uplink bandwidth portion.

7. The method for randomly accessing a channel parameter set as claimed in claim 4, characterized in that: The parameter set defines the subcarrier spacing and cyclic prefix of the active uplink bandwidth portion.

8. The method for randomly accessing a channel parameter set as claimed in claim 4, characterized in that: This parameter set defines the cyclic prefix of the active uplink bandwidth portion.

9. A device for random access channel parameter set, the device being a user equipment, characterized in that: include: Memory; as well as at least one processor coupled to the memory and configured to: receiving a random access response from a base station in an active downlink bandwidth portion, the random access response indicating uplink resources in an active uplink bandwidth portion for sending the random access message, wherein the active uplink bandwidth portion is different from an initial uplink bandwidth portion configured for the user equipment; generating the random access message based on a parameter set of the active uplink bandwidth portion; as well as The random access message is sent on the uplink resources of the active uplink bandwidth portion.

10. The device according to claim 9, characterized in that The active uplink bandwidth portion is the same as the active downlink bandwidth portion, the initial uplink bandwidth portion where the user equipment resides is the same as the initial downlink bandwidth portion, and the active uplink bandwidth portion is different from the initial downlink bandwidth portion.

11. The apparatus of claim 9, the at least one processor further configured to: When the user equipment is in a connected state before receiving the random access response, a preamble sequence is sent to the base station in the active uplink bandwidth portion.

12. The apparatus of claim 9, wherein the at least one processor is further configured to: The parameter set for the active uplink bandwidth is determined based on receiving one or more configurations from the base station.

13. The apparatus of claim 12, the at least one processor further configured to: A control message is received from the base station, the control message including the one or more configurations defining the parameter set for the active uplink bandwidth portion.

14. The device according to claim 12, characterized in that This parameter set defines the subcarrier spacing of the active uplink bandwidth portion.

15. The device according to claim 12, characterized in that The parameter set defines the subcarrier spacing and cyclic prefix of the active uplink bandwidth portion.

16. The device according to claim 12, characterized in that This parameter set defines the cyclic prefix of the active uplink bandwidth portion.

17. A computer readable medium for storing computer executable code, characterized in that: The computer executable code is used to execute the steps of the method for setting a random access channel parameter set according to any one of claims 1 to 8.

Images