Systems and methods for signaling transmission structure enhancement
The OTFS technique processes signals in the delay-Doppler domain to enhance wireless communication systems, addressing high-Doppler issues by maintaining orthogonality and reducing interference, thus improving performance in non-terrestrial networks.
Patent Information
- Application Number
- PCT/CN2024/105397
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- Filing Date
- 2024-07-15
- Publication Date
- 2025-11-20
AI Technical Summary
Existing wireless communication systems face challenges in high-Doppler environments, such as non-terrestrial networks, due to the destruction of subcarrier orthogonality and inter-carrier interference in OFDM systems, leading to performance degradation.
Implementing an orthogonal time frequency space (OTFS) technique for signal transmission, which processes signals in the delay-Doppler domain, enhancing the signal structure by defining resource locations, sizes, and patterns in the time-frequency domain, and using transform precoding operations to improve time and frequency estimation.
OTFS effectively addresses high-Doppler challenges by maintaining signal orthogonality and reducing interference, enabling efficient communication in environments with high mobility and Doppler shifts.
Smart Images

Figure CN2024105397_20112025_PF_FP_ABST
Abstract
Description
SYSTEMS AND METHODS FOR SIGNALING TRANSMISSION STRUCTURE ENHANCEMENTTECHNICAL FIELD
[0001] The disclosure relates generally to wireless communications, including but not limited to systems and methods for signaling transmission structure enhancement.BACKGROUND
[0002] The standardization organization Third Generation Partnership Project (3GPP) is currently in the process of specifying a new Radio Interface called 5G New Radio (5G NR) as well as a Next Generation Packet Core Network (NG-CN or NGC) . The 5G NR will have three main components: a 5G Access Network (5G-AN) , a 5G Core Network (5GC) , and a User Equipment (UE) . In order to facilitate the enablement of different data services and requirements, the elements of the 5GC, also called Network Functions, have been simplified with some of them being software based, and some being hardware based, so that they could be adapted according to need. Communication via satellite is one of the typical scenarios of the non-terrestrial networks in 3GPP standardization.SUMMARY
[0003] The example embodiments disclosed herein are directed to solving the issues relating to one or more of the problems presented in the prior art, as well as providing additional features that will become readily apparent by reference to the following detailed description when taken in conjunction with the accompany drawings. In accordance with various embodiments, example systems, methods, devices and computer program products are disclosed herein. It is understood, however, that these embodiments are presented by way of example and are not limiting, and it will be apparent to those of ordinary skill in the art who read the present disclosure that various modifications to the disclosed embodiments can be made while remaining within the scope of this disclosure.
[0004] At least one aspect is directed to a system, method, apparatus, or a computer-readable medium of the following. A first wireless network node (e.g., a user equipment (UE) or a base station (BS) ) may determine a configuration message associated with a first signal and a second signal. The first wireless network node may process the first signal and the second signal for transmission, according to the configuration message. In some embodiments, the first signal can be processed sequentially by a transform precoding operation resulting in a block of complex-valued symbols and baseband signal generation operation resulting in a time-continuous signal. In some embodiments, the second signal can be processed by a baseband signal generation operation resulting in a time-continuous signal.
[0005] In some embodiments, the first signal can be mapped to at least one resource, which is associated with at least one of following resources: a delay domain resource, or a Doppler domain resource. In some embodiments, the at least one resource is determined by at least one of:the delay domain resource is associated with a frequency domain resource; or the Doppler domain resource is associated with a time domain resource. In some embodiments, the association of the resource between different domain may include at least one of following operation: a transform precoding operation, an inverse symplectic finite Fourier transform operation, a pulse shaping filter operation, or a symplectic finite Fourier transform operation.
[0006] In some embodiments, the configuration message may comprise / indicate at least one of:a location relationship of resources in a time-frequency (TF) domain between the first signal and the second signal; a size of a resource in the TF domain for the first signal; a starting position or an ending position of the resource in the TF domain of the first signal; a subcarrier spacing of the first signal; a pattern of the first signal; a signaling for enabling or disabling a transform precoding operation of the first signal; a condition / trigger for enabling or disabling the transform precoding operation of the first signal; or a relationship between resources of the first signal and the second signal (e.g., a downlink synchronization signal, uplink signal, downlink signal, or a signal carried in RO (e.g., physical random access signal) ) . In some embodiments, the location relationship of resources in the TF domain may comprise at least one of: a resource of the first signal can be configured in the TF domain before or after at least one random access channel (RACH) occasion (RO) in a frequency domain of one or more consecutive RACH slots; a resource of the first signal can be configured as a frequency domain multiplexed (FDMed) resource with at least one RO in one or more consecutive RACH slots; a resource of the first signal can be configured in the TF domain before or after at least one RO in a time domain of one RACH slot; a resource of the first signal can be configured as a time division multiplexed (TDMed) resource with at least one RO in one RACH slot; a resource of the first signal can be configured in the TF domain between a plurality of ROs in the time domain of at least two consecutive RACH slots; a resource of the first signal can be configured as a TDMed resource between a plurality of ROs in at least two consecutive RACH slots; or a resource of the first signal can be partially configured as at least one RO of at least one or more consecutive RACH slots.
[0007] In some embodiments, the size of the resource in the TF domain for the first signal can be determined according to at least one of: a length of an occupied time domain resource; or a length of an occupied frequency domain resource. In some embodiments, the length of the occupied time domain resource / grid / symbol (e.g., NDoppler) can be at least one of: same as a length of a resource of at least one random access channel (RACH) occasion (RO) in one or more consecutive random access channel (RACH) slots; same as a length of a resource in a PRACH slot; same as a length of consecutive resources between at least two consecutive slots; indicated by a high layer signaling; predefined; or indicated by an index associated with a table (or other data structure) . In some embodiments, the length of the occupied frequency domain resource / grid / symbol (e.g., MDelay) can be at least one of: same as a length of a resource of at least one random access channel (RACH) occasion (RO) in one or more consecutive physical random access channel (PRACH) slots; indicated by a high layer signaling; (pre) defined; or indicated by an index associated with a table (or other data structure) .
[0008] In some embodiments, the starting position or the ending position of the resource in the TF domain of the first signal can be determined according to at least one of: a starting position or an ending position of the resource in a time domain; or a starting position or an ending position of the resource in a frequency domain. In some embodiments, the starting position of the resource in the time domain can be a starting symbol of a first random access channel (RACH) occasion (RO) in a random access channel (RACH) slot. The starting position of the resource in the time domain can be a starting symbol in a RACH slot. The starting position of the resource in the time domain can be an ending symbol of a RO in the RACH slot. The starting position of the resource in the time domain can be configured by a first high layer signaling. The ending position of the resource in the time domain can be an ending symbol of at least one RO in at least one RACH slot. The ending position of the resource in the time domain can be an ending symbol in at least one RACH slot. The ending position of the resource in the time domain can be a symbol before a starting symbol of a first RO in the RACH slot. The ending position of the resource in the time domain can be configured by the first high layer signaling or a second high layer signaling.
[0009] In some embodiments, the starting position of the resource in the frequency domain can be a resource block (RB) after an ending RB of a random access channel (RACH) occasion (RO) in a random access channel (RACH) slot. The starting position of the resource in the frequency domain can be a starting RB of a first RO in the RACH slot. The starting position of the resource in the frequency domain can be configured by a first high layer signaling. The ending position of the resource in the frequency domain can be the ending RB of the RO in the RACH slot. The ending position of the resource in the frequency domain can be configured by the first high layer signaling or a second high layer signaling.
[0010] In some embodiments, the subcarrier spacing of the first signal can be at least one of: same as a subcarrier spacing of a downlink (DL) synchronization signal; same as a subcarrier spacing of system information; same as a subcarrier spacing of a physical downlink control channel (PDCCH) ; same as a subcarrier spacing of a physical downlink shared channel (PDSCH) ; same as a subcarrier spacing of a physical broadcast channel (PBCH) ; same as a subcarrier spacing of a physical random access channel (PRACH) ; same as a subcarrier spacing of a physical uplink control channel (PUCCH) ; same as a subcarrier spacing of a physical uplink shared channel (PUSCH) ; or configured by a high layer signaling.
[0011] In some embodiments, the pattern of the first signal may comprise (support, or be characterized by) at least one of: the first signal with full guard symbols, or the first signal with reduced guard symbols. The first signal may comprise at least one pilot. A first resource of the pilot can be independent of the second signal or embedded within the second signal. In some embodiments, the first resource of the first signal can be determined by at least one of: the number of occupied time domain resource (s) for the first signal can be same as a length of an occupied time domain resource, wherein a number of occupied frequency resource (s) for the first signal can be determined by a maximum delay tap; or the number of the occupied time domain resource (s) for the first signal can be determined by a maximum Doppler tap, and the number of the occupied frequency resource (s) for the first signal can be determined by the maximum delay tap; or the number of the occupied time domain resource (s) for the first signal (e.g., Ng) can be equal to a length of the occupied time domain resource (e.g., NDoppler) , and the number of the occupied frequency resource (s) for the first signal (e.g., Mg) can be equal to a length of the occupied frequency domain resource (e.g., MDelay) . In some embodiments, when a number of the first signal is equal to one or is greater than one, a position of the first signal can be in a center of a plurality of resource elements.
[0012] In some embodiments, the signaling for enabling or disabling the transform precoding operation of the first signal may comprise at least one of: a high layer signaling; or a downlink control information (DCI) signaling. The transform precoding operation can be at least one of: an inverse symplectic finite Fourier transform (ISFFT) operation, a symplectic finite Fourier transform (SFFT) operation, a pulse shaping filter operation, or other pre-processing operation, post-processing operation) .
[0013] In some embodiments, the condition / trigger for enabling or disabling the transform precoding operation of the first signal may comprise at least one of: when a speed of the first wireless network node exceeds a certain threshold; or when the first wireless network node operates in a higher frequency band, or when the frequency band the first wireless network operating exceeds a certain threshold.
[0014] In some embodiments, the relationship between the resources of the first signal and the second signal may comprise at least one of: a mapping relationship of a downlink (DL) synchronization signal (e.g., a synchronization signal block (SSB) ) can be defined, wherein the resources of the first signal can be determined by a DL synchronization signal, the DL synchronization signal can be associated with an index of a beam, and the resources of the second signal can be determined by the resources of the first signal; the mapping relationship between the DL synchronization signal and the resource of the second signal can be reused, wherein the resources of the first signal and the second signal can be associated with the same DL synchronization signal, and the DL synchronization signal can be associated with the index of the beam; the mapping relationship between the DL synchronization signal and the resource of the second signal can be reused, wherein the resources of the second signal can be determined by the DL synchronization signal, the DL synchronization signal can be associated with the index of the beam, and the resources of the first signal can be determined by the resources of the second signal; the resources of the first signal can be associated with the second signal in an increasing order of first time, and then frequency; or the resources of the first signal can be associated with the second signal in an increasing order of first frequency, and then time.
[0015] In some embodiments, a second wireless network node (e.g., a UE or a BS) may transmit a configuration message associated with a first signal and a second signal to a first wireless network node (e.g., a UE or a BS) . The first wireless network node may determine the configuration message associated with the first signal and the second signal. The first wireless network node may process (e.g., handle, transform. Prepare, convert) the first signal and the second signal for transmission, according to the configuration message.BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Various example embodiments of the present solution are described in detail below with reference to the following figures or drawings. The drawings are provided for purposes of illustration only and merely depict example embodiments of the present solution to facilitate the reader's understanding of the present solution. Therefore, the drawings should not be considered limiting of the breadth, scope, or applicability of the present solution. It should be noted that for clarity and ease of illustration, these drawings are not necessarily drawn to scale.
[0017] FIG. 1 illustrates an example cellular communication network in which techniques disclosed herein may be implemented, in accordance with an embodiment of the present disclosure;
[0018] FIG. 2 illustrates a block diagram of an example base station and a user equipment device, in accordance with some embodiments of the present disclosure;
[0019] FIG. 3 illustrates an example orthogonal time frequency space (OTFS) transmitter and receiver structure, in accordance with some embodiments of the present disclosure;
[0020] FIG. 4 illustrates an example orthogonal frequency division multiplexing (OFDM) -based OTFS transmitter and receiver structure, in accordance with some embodiments of the present disclosure;
[0021] FIG. 5 illustrates an example conversion between a time-frequency (TF) domain and a delay doppler (DD) domain, in accordance with some embodiments of the present disclosure;
[0022] FIG. 6 illustrates an example signaling transmission structure, in accordance with some embodiments of the present disclosure;
[0023] FIG. 7 illustrates an example signaling transmission structure, in accordance with some embodiments of the present disclosure;
[0024] FIG. 8 illustrates an example signaling transmission structure, in accordance with some embodiments of the present disclosure;
[0025] FIG. 9 illustrates an example signaling transmission structure, in accordance with some embodiments of the present disclosure;
[0026] FIG. 10 illustrates an example signaling transmission structure, in accordance with some embodiments of the present disclosure;
[0027] FIG. 11 illustrates an example signaling transmission structure, in accordance with some embodiments of the present disclosure; and
[0028] FIG. 12 illustrates a flow diagram of an example method for signaling transmission structure enhancement, in accordance with an embodiment of the present disclosure.DETAILED DESCRIPTION
[0029] 1. Mobile Communication Technology and Environment
[0030] FIG. 1 illustrates an example wireless communication network, and / or system, 100 in which techniques disclosed herein may be implemented, in accordance with an embodiment of the present disclosure. In the following discussion, the wireless communication network 100 may be any wireless network, such as a cellular network or a narrowband Internet of things (NB-IoT) network, and is herein referred to as “network 100. ” Such an example network 100 includes a base station 102 (hereinafter “BS 102” ; also referred to as wireless communication node) and a user equipment device 104 (hereinafter “UE 104” ; also referred to as wireless communication device) that can communicate with each other via a communication link 110 (e.g., a wireless communication channel) , and a cluster of cells 126, 130, 132, 134, 136, 138 and 140 overlaying a geographical area 101. In Figure 1, the BS 102 and UE 104 are contained within a respective geographic boundary of cell 126. Each of the other cells 130, 132, 134, 136, 138 and 140 may include at least one base station operating at its allocated bandwidth to provide adequate radio coverage to its intended users.
[0031] For example, the BS 102 may operate at an allocated channel transmission bandwidth to provide adequate coverage to the UE 104. The BS 102 and the UE 104 may communicate via a downlink radio frame 118, and an uplink radio frame 124 respectively. Each radio frame 118 / 124 may be further divided into sub-frames 120 / 127 which may include data symbols 122 / 128. In the present disclosure, the BS 102 and UE 104 are described herein as non-limiting examples of “communication nodes, ” generally, which can practice the methods disclosed herein. Such communication nodes may be capable of wireless and / or wired communications, in accordance with various embodiments of the present solution.
[0032] FIG. 2 illustrates a block diagram of an example wireless communication system 200 for transmitting and receiving wireless communication signals (e.g., OFDM / OFDMA signals) in accordance with some embodiments of the present solution. The system 200 may include components and elements configured to support known or conventional operating features that need not be described in detail herein. In one illustrative embodiment, system 200 can be used to communicate (e.g., transmit and receive) data symbols in a wireless communication environment such as the wireless communication environment 100 of Figure 1, as described above.
[0033] System 200 generally includes a base station 202 (hereinafter “BS 202” ) and a user equipment device 204 (hereinafter “UE 204” ) . The BS 202 includes a BS (base station) transceiver module 210, a BS antenna 212, a BS processor module 214, a BS memory module 216, and a network communication module 218, each module being coupled and interconnected with one another as necessary via a data communication bus 220. The UE 204 includes a UE (user equipment) transceiver module 230, a UE antenna 232, a UE memory module 234, and a UE processor module 236, each module being coupled and interconnected with one another as necessary via a data communication bus 240. The BS 202 communicates with the UE 204 via a communication channel 250, which can be any wireless channel or other medium suitable for transmission of data as described herein.
[0034] As would be understood by persons of ordinary skill in the art, system 200 may further include any number of modules other than the modules shown in Figure 2. Those skilled in the art will understand that the various illustrative blocks, modules, circuits, and processing logic described in connection with the embodiments disclosed herein may be implemented in hardware, computer-readable software, firmware, or any practical combination thereof. To clearly illustrate this interchangeability and compatibility of hardware, firmware, and software, various illustrative components, blocks, modules, circuits, and steps are described generally in terms of their functionality. Whether such functionality is implemented as hardware, firmware, or software can depend upon the particular application and design constraints imposed on the overall system. Those familiar with the concepts described herein may implement such functionality in a suitable manner for each particular application, but such implementation decisions should not be interpreted as limiting the scope of the present disclosure
[0035] In accordance with some embodiments, the UE transceiver 230 may be referred to herein as an "uplink" transceiver 230 that includes a radio frequency (RF) transmitter and a RF receiver each comprising circuitry that is coupled to the antenna 232. A duplex switch (not shown) may alternatively couple the uplink transmitter or receiver to the uplink antenna in time duplex fashion. Similarly, in accordance with some embodiments, the BS transceiver 210 may be referred to herein as a "downlink" transceiver 210 that includes a RF transmitter and a RF receiver each comprising circuity that is coupled to the antenna 212. A downlink duplex switch may alternatively couple the downlink transmitter or receiver to the downlink antenna 212 in time duplex fashion. The operations of the two transceiver modules 210 and 230 may be coordinated in time such that the uplink receiver circuitry is coupled to the uplink antenna 232 for reception of transmissions over the wireless transmission link 250 at the same time that the downlink transmitter is coupled to the downlink antenna 212. Conversely, the operations of the two transceivers 210 and 230 may be coordinated in time such that the downlink receiver is coupled to the downlink antenna 212 for reception of transmissions over the wireless transmission link 250 at the same time that the uplink transmitter is coupled to the uplink antenna 232. In some embodiments, there is close time synchronization with a minimal guard time between changes in duplex direction.
[0036] The UE transceiver 230 and the base station transceiver 210 are configured to communicate via the wireless data communication link 250, and cooperate with a suitably configured RF antenna arrangement 212 / 232 that can support a particular wireless communication protocol and modulation scheme. In some illustrative embodiments, the UE transceiver 210 and the base station transceiver 210 are configured to support industry standards such as the Long Term Evolution (LTE) and emerging 5G standards, and the like. It is understood, however, that the present disclosure is not necessarily limited in application to a particular standard and associated protocols. Rather, the UE transceiver 230 and the base station transceiver 210 may be configured to support alternate, or additional, wireless data communication protocols, including future standards or variations thereof.
[0037] In accordance with various embodiments, the BS 202 may be an evolved node B (eNB) , a serving eNB, a target eNB, a femto station, or a pico station, for example. In some embodiments, the UE 204 may be embodied in various types of user devices such as a mobile phone, a smart phone, a personal digital assistant (PDA) , tablet, laptop computer, wearable computing device, etc. The processor modules 214 and 236 may be implemented, or realized, with a general purpose processor, a content addressable memory, a digital signal processor, an application specific integrated circuit, a field programmable gate array, any suitable programmable logic device, discrete gate or transistor logic, discrete hardware components, or any combination thereof, designed to perform the functions described herein. In this manner, a processor may be realized as a microprocessor, a controller, a microcontroller, a state machine, or the like. A processor may also be implemented as a combination of computing devices, e.g., a combination of a digital signal processor and a microprocessor, a plurality of microprocessors, one or more microprocessors in conjunction with a digital signal processor core, or any other such configuration.
[0038] Furthermore, the steps of a method or algorithm described in connection with the embodiments disclosed herein may be embodied directly in hardware, in firmware, in a software module executed by processor modules 214 and 236, respectively, or in any practical combination thereof. The memory modules 216 and 234 may be realized as RAM memory, flash memory, ROM memory, EPROM memory, EEPROM memory, registers, a hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art. In this regard, memory modules 216 and 234 may be coupled to the processor modules 210 and 230, respectively, such that the processors modules 210 and 230 can read information from, and write information to, memory modules 216 and 234, respectively. The memory modules 216 and 234 may also be integrated into their respective processor modules 210 and 230. In some embodiments, the memory modules 216 and 234 may each include a cache memory for storing temporary variables or other intermediate information during execution of instructions to be executed by processor modules 210 and 230, respectively. Memory modules 216 and 234 may also each include non-volatile memory for storing instructions to be executed by the processor modules 210 and 230, respectively.
[0039] The network communication module 218 generally represents the hardware, software, firmware, processing logic, and / or other components of the base station 202 that enable bi-directional communication between base station transceiver 210 and other network components and communication nodes configured to communication with the base station 202. For example, network communication module 218 may be configured to support internet or WiMAX traffic. In a typical deployment, without limitation, network communication module 218 provides an 802.3 Ethernet interface such that base station transceiver 210 can communicate with a conventional Ethernet based computer network. In this manner, the network communication module 218 may include a physical interface for connection to the computer network (e.g., Mobile Switching Center (MSC) ) . The terms “configured for, ” “configured to” and conjugations thereof, as used herein with respect to a specified operation or function, refer to a device, component, circuit, structure, machine, signal, etc., that is physically constructed, programmed, formatted and / or arranged to perform the specified operation or function.
[0040] The Open Systems Interconnection (OSI) Model (referred to herein as, “open system interconnection model” ) is a conceptual and logical layout that defines network communication used by systems (e.g., wireless communication device, wireless communication node) open to interconnection and communication with other systems. The model is broken into seven subcomponents, or layers, each of which represents a conceptual collection of services provided to the layers above and below it. The OSI Model also defines a logical network and effectively describes computer packet transfer by using different layer protocols. The OSI Model may also be referred to as the seven-layer OSI Model or the seven-layer model. In some embodiments, a first layer may be a physical layer. In some embodiments, a second layer may be a Medium Access Control (MAC) layer. In some embodiments, a third layer may be a Radio Link Control (RLC) layer. In some embodiments, a fourth layer may be a Packet Data Convergence Protocol (PDCP) layer. In some embodiments, a fifth layer may be a Radio Resource Control (RRC) layer. In some embodiments, a sixth layer may be a Non Access Stratum (NAS) layer or an Internet Protocol (IP) layer, and the seventh layer being the other layer.
[0041] Various example embodiments of the present solution are described below with reference to the accompanying figures to enable a person of ordinary skill in the art to make and use the present solution. As would be apparent to those of ordinary skill in the art, after reading the present disclosure, various changes or modifications to the examples described herein can be made without departing from the scope of the present solution. Thus, the present solution is not limited to the example embodiments and applications described and illustrated herein. Additionally, the specific order or hierarchy of steps in the methods disclosed herein are merely example approaches. Based upon design preferences, the specific order or hierarchy of steps of the disclosed methods or processes can be re-arranged while remaining within the scope of the present solution. Thus, those of ordinary skill in the art will understand that the methods and techniques disclosed herein present various steps or acts in a sample order, and the present solution is not limited to the specific order or hierarchy presented unless expressly stated otherwise.
[0042] 2. Systems and Methods for Signaling Transmission Structure Enhancement
[0043] The requirements for future mobile systems are extremely varied and strict. For example, the mobility requirement can be up to 500 km / h in a 5G system. Moreover, future mobile systems may require mobility of more than 500 km / h. Future mobile systems may also be expected to be launched for non-terrestrial coverage (e.g., underwater, unmanned aerial vehicles (UAV) , and / or LEO satellites) . Due to high latency and high Doppler shift in these environments, an orthogonal frequency division multiplexing (OFDM) system designed for lower-Doppler environments may face great challenges in estimating and compensating for the Doppler shift because of the destruction of subcarrier orthogonality, resulting in serious performance degradation. Doppler shifts can cause inter-carrier interference (ICI) in OFDM. Therefore, a classical OFDM system may not be adequate for time and frequency estimation and may no longer be effective. Orthogonal time frequency and space modulation can be a promising technique with attractive signaling attributes that can address high-Doppler signaling requirements through a different approach, namely, signaling in a delay-Doppler (DD) domain instead of the conventional approach of signaling in a time-frequency (TF) domain.
[0044] In the present disclosure, the method for signal transmission structure enhancement using orthogonal time frequency space (OTFS) technique is disclosed. The present disclosure includes an enhanced signal structure, a pattern of a first signal, and a relationship between resource (s) of the first signal and a second signal (e.g., downlink (DL) synchronization signal / random access channel (RACH) occasion (RO) ) . The content of the enhanced signal structure may comprise / indicate at least one of: a location relationship of time-frequency (T-F) resource between a first signal and a second signal; a determination of a size of TF resource for the first signal; a determination of a starting / ending position of the TF resource of the first signal; or a determination of a subcarrier spacing of the first signal. The content of the pattern of the first signal may comprise at least one of: a pattern of the first signal; a signaling for enabling / disabling the first signal; or condition (s) for enabling / disabling the first signal.
[0045] Orthogonal Frequency Division Multiplexing (OFDM) Modulation
[0046] A transmitter may first map / process information symbols X [n, m] residing in a time-frequency (TF) domain. The transmitter may apply the information symbols to the time-frequency transformed symbols X [n, m] to convert to a time domain signal s (t) for transmission over a channel through inverse finite Fourier transform (IFFT) . At a receiver, the received signal r(t) can be transformed back to a time-frequency domain signal Y [n, m] through finite Fourier transform (FFT) for demodulation. To resist / revent / avoid multipath fading and symbol interference during transmission, cyclic prefixes can be added to the transmitted signal to reduce signal interference, and / or antennas can be used for transmission.
[0047] Orthogonal Time Frequency Space (OTFS) Modulation
[0048] FIG. 3 illustrates an example general orthogonal time frequency space (OTFS) transmitter and receiver structure, in accordance with some embodiments of the present disclosure. The block diagram of the OFDM-based OTFS transmitter and receiver is shown in FIG. 3. A OTFS modulation may comprise a cascade of two two-dimensional transforms at both the transmitter and the receiver. The transmitter may first map / transform / process the information symbols x [k, l] residing in the delay-Doppler domain to symbols X [n, m] in the time-frequency domain through a transform called the 2D inverse symplectic finite Fourier transform (ISFFT) and pulse shaping filter, which together may be referred as the OTFS transform. The Heisenberg transform, which is a generalization of the OFDM transform, can be applied to the time-frequency transformed symbols X [n, m] to convert to the time domain signal s (t) for transmission over the channel. At the receiver, the received signal r (t) can be transformed back to a time-frequency domain signal Y [n, m] through Wigner transform (inverse of the Heisenberg transform) , which is a generalization of the inverse OFDM transform. Subsequently, Y [n, m] can be transformed to the delay-Doppler domain signal y [k, l] through the windowing and symplectic finite Fourier transform (SFFT) for demodulation. In some embodiments, x [k, l] and y [k, l] may represent signal (s) with doppler-delay coordinates (k, l) in a delay-Doppler domain, where k: Doppler-domain, 0 ≤ k ≤ N-1, and l: delay-domain, 0 ≤ l ≤ M -1. In some embodiments, X [n, m] and Y [n, m] may represent signal (s) with time-frequency coordinates (n, m) in a time-frequency domain, where n: time-domain, 0 ≤ n ≤ N-1, and m: frequency-domain, 0 ≤ m ≤ M-1.
[0049] The block diagram of the OFDM-based OTFS transmitter and receiver is shown in FIG. 4 when a pulse shaping filter is a rectangular window. FIG. 4 illustrates an example orthogonal frequency division multiplexing (OFDM) -based OTFS transmitter and receiver structure, in accordance with some embodiments of the present disclosure.
[0050] FIG. 5 illustrates an example conversion / transformation between a time-frequency (TF) domain and a delay doppler (DD) domain, in accordance with some embodiments of the present disclosure. In FIG. 5, the grid diagram on the left is a grid diagram of a TF domain, occupying M*N resource elements. T is the sampling interval along the time axis t. Δf is the sampling interval along the frequency axis. N and M are the sampling number along the time axis and frequency axis respectively, also known as a symbol number and a subcarrier number. In FIG. 5, the grid diagram on the right is the grid diagram of DD domain, which can occupy M*N resource elements. 1 / NT is the sampling interval along the Doppler axis (e.g., the Doppler resolution) . 1 / MΔf is the sampling interval along the delay axis (e.g., the delay resolution) . N and M are the sampling number along the Doppler axis and the delay axis respectively.
[0051] Based on the grid diagram, the conversion between TF domain and DD domain can be understood as that the signal defined on the TF domain grid diagram is mapped to the signal on the DD domain grid diagram through symplectic finite Fourier transform (SFFT) . Similarly, with inverse symplectic finite Fourier transform (ISFFT) , the signal on the DD domain grid can be mapped back to the TF domain grid. Assuming that the maximum moving speed is v and the maximum delay is td, the corresponding maximum Doppler tap can be v / c*fc / (1 / NT) and the maximum delay tap can be td / (1 / M) .
[0052] Synchronization Signal Block (SSB) and Random Access Channel (RACH) Occasion (RO) Association Mapping
[0053] In new radio (NR) , a downlink (DL) synchronization signal (e.g., SSB) can be associated with different beam (s) . A user equipment (UE) may select a certain beam and send a physical random access channel (PRACH) on a random access channel (RACH) occasion (RO) using that beam. In order for the network (NW) to determine which beam the UE has selected, a specific mapping between SSB and RACH Occasion (RO) is defined. By detecting which RO that the UE uses to send the PRACH, NW can determine which SSB beam that the UE has selected. Each valid RO and its contained preamble sequence can be associated and mapped with specific SSB. Once the wireless network node (e.g., UE) selects an SSB, the wireless network node may randomly select a preamble sequence from the corresponding RO resources based on the mapping rules from SSB to RO for transmission. The mapping rule can be determined by at least one following parameters. A number of SSBs corresponding to each RO can be N. The range of N values can be {1 / 8, 1 / 4, 1 / 2, 1, 2, 4, 8, 16} , signaled by a high layer parameter ssb-perRACH-OccasionAndCB-PreamblesPerSSB. Each RO may include preambles Npreamble, with a value range of 1-64. The number of preamble corresponding to each SSB for contention-based random access (CBRA) can be R. If N < 1, the N may indicate that each SSB corresponds to N consecutive ROs. If N >= 1, the N may indicate that each RO corresponds to N SSBs.
[0054] In the present disclosure, a signal and a transceiver structure are designed for time and frequency estimation. A first wireless network node (e.g., a user equipment (UE) or a base station (BS) ) may determine a configuration message associated with a first signal and a second signal. The first wireless network node may process the first signal and the second signal for transmission, according to the configuration message. The configuration message may comprise / indicate at least one of: a location relationship of resources in a time-frequency (TF) domain between the first signal and the second signal; a size of a resource in the TF domain for the first signal; a starting position or an ending position of the resource in the TF domain of the first signal; a subcarrier spacing of the first signal; a pattern of the first signal; a signaling for enabling or disabling a processing module / transform precoding operation of the first signal; a condition for enabling or disabling the processing module / transform precoding operation of the first signal; or a relationship between resources of the first signal and the second signal (e.g., a downlink synchronization signal or a RO) .
[0055] In some embodiments, a second wireless network node (e.g., a UE or a BS) may transmit a configuration message associated with a first signal and a second signal to a first wireless network node (e.g., a UE or a BS) . The first wireless network node may receive / determine the configuration message associated with the first signal and the second signal. The first wireless network node may process the first signal and the second signal for transmission, according to the configuration message.
[0056] Implementation Example 1: Enhanced Signal Structure
[0057] FIGs. 6-11 illustrate example signaling transmission structures, in accordance with some embodiments of the present disclosure. The structure (s) can be used for data transmission in uplink and downlink channels, and / or for time-frequency offset estimation for the channel (e.g., PRACH) .
[0058] The signal structure may include 2 types of signals (e.g., a first signal and a second signal) . In some embodiments, the first signal can be processed sequentially by a transform precoding operation (e.g., ISFFT, SFFT, other pre-processing module / operation, or post-processing module / operation) resulting in a block of complex-valued symbols and a baseband signal generation operation (e.g., FFT, DFT) resulting in a time-continuous signal. In some embodiments, the second signal can be processed by the baseband signal generation operation resulting in a time-continuous signal. In some embodiments, the first signal can be mapped to at least one resource, which is associated with at least one of following resource: a delay domain resource, a Doppler domain resource. In some embodiments, the at least one resource is determined by at least one of following mappings: the delay domain resource can be associated with the frequency domain resource; the doppler domain resource can be associated with the time domain resource. In some embodiments, the association of the resource between different domain may include at least one of following operation: a transform precoding operation, an inverse symplectic finite Fourier transform operation, a pulse shaping filter operation, or a symplectic finite Fourier transform operation.
[0059] The processing can be as follows. For example, the first signal can be mapped to a Delay-Doppler domain resource and can then be modulated by ISFFT (e.g., pre-processing) and OFDM for transmission over the channel. At the receiver, the received signal can be transformed back to Delay-Doppler domain signal through OFDM-demodulation and SFFT (e.g., post-processing) . The time frequency offset can be estimated based on the difference of transmitted signal and received signal. Feature: the first signal can be processed by a general OTFS transmitter and receiver described above or OFDM-based OTFS transmitter and receiver described above and can be carried in the DD domain resource.
[0060] In some embodiments, the second signal can be in a time frequency (TF) domain and modulated by OFDM for transmission over the channel. At the receiver, the received signal can be transformed back to time-frequency domain signal through OFDM de-modulation. The time frequency offset experienced by the second signal can be compensated using the time and frequency offset estimated by the first signal. Feature: the second signal can be processed by a OFDM transmitter and receiver or discrete Fourier transform (DFT) -s-OFDM transmitter and receiver and carried in TF domain. The second signal can be at least one of: a physical random access channel (PRACH) signal, a physical uplink shared channel (PUSCH) signal, a physical uplink control channel (PUCCH) signal, a physical downlink shared channel (PDSCH) signal, or a physical downlink control channel (PDCCH) signal.
[0061] Location relationship of T-F resource between the first signal and the second signal
[0062] The location relationship of resources in the TF domain may comprise / support (or be characterized by) at least one of: a resource of the first signal can be configured in the TF domain before or after at least one random access channel (RACH) occasion (RO) in a frequency domain of one or more consecutive RACH slots; a resource of the first signal can be configured as a frequency domain multiplexed (FDMed) resource with at least one RO in one or more consecutive RACH slots; a resource of the first signal can be configured in the TF domain before or after at least one RO in a time domain of one RACH slot; a resource of the first signal can be configured as a time division multiplexed (TDMed) resource with at least one RO in one RACH slot; a resource of the first signal can be configured in the TF domain between a plurality of ROs in the time domain of at least two consecutive RACH slots; a resource of the first signal can be configured as a TDMed resource between a plurality of ROs in at least two consecutive RACH slots; or a resource of the first signal can be partially configured as at least one RO of at least one or more consecutive RACH slots. For the relative positional relationship of the first signal and the second signal, the following options can be supported.
[0063] Option-1: A resource of the first signal can be located on the T-F domain resource before / after one or more frequency domain RACH Occasions (ROs) in one or more consecutive PRACH slots or the resource of the first signal can be FDMed with ROs in one or more consecutive PRACH slots, the location, which can be either before or after ROs. FIG. 6 illustrates an example signaling transmission structure (e.g., Option-1) , in accordance with some embodiments of the present disclosure.
[0064] Option-2: A resource of the first signal can be located on the T-F domain resource before / after one or more time domain RACH occasions in one PRACH slot or the resource of the first signal can be TDMed with ROs in one PRACH slot, which can be either before or after ROs. FIG. 7 illustrates an example signaling transmission structure (e.g., Option-2) , in accordance with some embodiments of the present disclosure.
[0065] Option-3: A resource of the first signal can be located on the T-F domain resource between one or more time domain RACH occasions in at least two consecutive PRACH slots or the resource of the first signal can be TDMed with ROs in at least two consecutive PRACH slots, which can be located one or more time domain RACH Occasions in at least two consecutive PRACH slots. FIG. 8 illustrates an example signaling transmission structure (e.g., Option-3) , in accordance with some embodiments of the present disclosure.
[0066] Option-4: A resource of the first signal can be partially configured as at least one RO of at least one or more consecutive RACH slots. For example, a resource of the first signal may reuse partial ROs as the resource of the first signal.
[0067] Determination of size of TF resource for the first signal
[0068] For the determination of size of the T-F resource for the first signal, the following options can be considered. The size of the resource in the TF time domain for the first signal can be determined according to at least one of: a length of an occupied time domain resource; or a length of an occupied frequency domain resource.
[0069] In some embodiments, the length of the occupied time domain resource / grid / symbol (e.g., NDoppler) can be at least one of: same as a length of a resource of at least one random access channel (RACH) occasion (RO) in one or more consecutive random access channel (RACH) slots; same as a length of a resource in a PRACH slot; same as a length of consecutive resources between at least two consecutive slots; indicated by a high layer signaling; predefined; or indicated by an index associated with a table.
[0070] In certain embodiments, the length of the occupied time-domain resource / grid / symbols NDoppler can be at least one of:
[0071] same as the length of the resource / grid / symbols of one or more RACH occasions in one or more consecutive PRACH slots;
[0072] equal to the length of the resource / grid / symbols within a PRACH slot, excluding the resource / grid / symbols for one or more RACH occasions;
[0073] equal to the length of the consecutive resource / grid / symbols between at least two consecutive slots, excluding the resource / grid / symbols for one or more RACH occasions in at least two consecutive slots;
[0074] indicated by high layer signaling, the length of the resource / grid / symbols in time domain can satisfy the condition: the length is greater than or equal to n times the maximum Doppler tap, the length NDoppler can be a specific value, or an index indexed to a specific value;
[0075] predefined, the length of the resource / grid / symbols in time domain can satisfy the condition: the length is greater than or equal to n times the maximum Doppler tap, the length can be a specific value NDoppler; or
[0076] tabulate defined and high layer signaling, the length of the resource / grid / symbols in time domain may satisfy the condition: the length is greater than or equal to n times the maximum Doppler tap, the length NDoppler can be an index indexed to a specific value (configured by a high layer signaling) .
[0077] In some embodiments, the length of the occupied frequency domain resource / grid / symbol (e.g., MDelay) can be at least one of: same as a length of a resource of at least one random access channel (RACH) occasion (RO) in one or more consecutive physical random access channel (PRACH) slots; indicated by a high layer signaling; predefined; or indicated by an index associated with a table.
[0078] In certain embodiments, the length of the occupied frequency-domain resource / grid / subcarrier / RB MDelay can be at least one of:
[0079] same as the length of the resource / grid / subcarrier / RB of one or more RACH occasions in one or more consecutive PRACH slots;
[0080] indicated by a high layer signaling, the length of the resource / grid / symbols / RB in frequency domain can satisfy the condition: the length is greater than or equal to n times the maximum delay tap, the length MDelay can be a specific value or an index indexed to a specific value;
[0081] predefined, the length of the resource / grid / subcarrier / RB in time domain can satisfy the condition: the length is greater than or equal to n times the maximum delay tap, the length can be a specific value MDelay; or
[0082] indicated by an index associated with a table, the length of the
[0083] resource / grid / subcarrier / RB in frequency domain can satisfy the condition: the length is greater than or equal to n times the maximum delay tap, the length MDelay can be an index indexed to a specific value (configured by a high layer signaling) .
[0084] Determination of the starting / ending position of the T-F resource of the first signal
[0085] In some embodiments, the starting position or the ending position of the resource in the TF domain of the first signal can be determined according to at least one of: a starting position or an ending position of the resource in a time domain; or a starting position or an ending position of the resource in a frequency domain. For the determination of the starting / ending position of the above T-F resources defined, the following solutions can be considered.
[0086] In some embodiments, the starting position of the resource in the time domain can be a starting symbol of a first random access channel (RACH) occasion (RO) in a random access channel (RACH) slot. The starting position of the resource in the time domain can be a starting symbol in a RACH slot. The starting position of the resource in the time domain can be an ending symbol of a RO in the RACH slot. The starting position of the resource in the time domain can be configured by a first high layer signaling. The ending position of the resource in the time domain can be an ending symbol of at least one RO in at least one RACH slot. The ending position of the resource in the time domain can be an ending symbol in at least one RACH slot. The ending position of the resource in the time domain can be a symbol before a starting symbol of a first RO in the RACH slot. The ending position of the resource in the time domain can be configured by the first high layer signaling or a second high layer signaling.
[0087] In certain embodiments, the starting / ending position of time domain resources can be determined by at least one of the following approaches.
[0088] The starting position of time domain can be same as the starting symbol of the first RACH occasion in a PRACH slot.
[0089] The starting position of time domain can be the starting symbol in a PRACH slot.
[0090] The starting position of time domain can be the ending symbol of the one or more RACH occasions in a PRACH slot.
[0091] The starting position of time domain can be configured by high layer signaling, e.g., configure the starting SFN, symbols index.
[0092] The ending position of time domain can be same as the ending position / symbol of one or more RACH occasion in one or more PRACH slots.
[0093] The ending position of time domain can be the ending symbol in one or more PRACH slots.
[0094] The ending position of the time domain can be the resource / grid / symbol before the starting position / symbol of the first RO in PRACH slot.
[0095] The ending position of time domain can be configured by a high layer signaling;
[0096] In some embodiments, the starting position of the resource in the frequency domain can be a resource block (RB) after an ending RB of a random access channel (RACH) occasion (RO) in a random access channel (RACH) slot. The starting position of the resource in the frequency domain can be a starting RB of a first RO in the RACH slot. The starting position of the resource in the frequency domain can be configured by a first high layer signaling. The ending position of the resource in the frequency domain can be the ending RB of the RO in the RACH slot. The ending position of the resource in the frequency domain can be configured by the first high layer signaling or a second high layer signaling.
[0097] In certain embodiments, the starting / ending position of frequency domain resources can be determined by at least one of the following approaches.
[0098] The starting position of frequency domain can be the resource / grid / RB after the ending RB of the one or more RACH occasions in a PRACH slot.
[0099] The starting position of frequency domain can be same as the starting RB of the first RACH occasion in a PRACH slot.
[0100] The starting position of frequency domain can be configured by high layer signaling, e.g., configure starting RB / subcarrier.
[0101] The ending position of frequency domain can be same as the ending position / RB of one or more RACH occasion in one or more PRACH slots.
[0102] The ending position of frequency domain can be configured by a high layer signaling;
[0103] Determination of subcarrier spacing of the first signal
[0104] In some embodiments, the subcarrier spacing of the first signal can be at least one of: same as a subcarrier spacing of a downlink (DL) synchronization signal; same as a subcarrier spacing of system information; same as a subcarrier spacing of a physical downlink control channel (PDCCH) ; same as a subcarrier spacing of a physical downlink shared channel (PDSCH) ; same as a subcarrier spacing of a physical broadcast channel (PBCH) ; same as a subcarrier spacing of a physical random access channel (PRACH) ; same as a subcarrier spacing of a physical uplink control channel (PUCCH) ; same as a subcarrier spacing of a physical uplink shared channel (PUSCH) ; or configured by a high layer signaling.
[0105] For the subcarrier spacing of the first signal, at least one of following options can be supported.
[0106] Same as the subcarrier spacing of the DL synchronization signal / system information (e.g., SSB) .
[0107] Same as the subcarrier spacing of the PDCCH (control resource set (CORESET) ) / PDSCH / physical broadcast channel (PBCH) .
[0108] Same as the subcarrier spacing of the PRACH / PUCCH / PUSCH.
[0109] Configured by a high layer signaling.
[0110] Implementation Example 2: Pattern of the first signal
[0111] In some embodiments, the pattern of the first signal may comprise / support (or be characterized by) at least one of: the first signal with full guard symbols, or the first signal with reduced guard symbols. The first signal may comprise at least one pilot. A first resource of the pilot can be independent of the second signal or embedded within the second signal.
[0112] In some embodiments, the first signal can be embedded pilot (s) with high power. For example, the first signal can be embedded pilot (s) with full guard symbols, embedded pilot (s) with reduced guard symbols.
[0113] Method-1: For the first signal with full guard symbols, the number of occupied time domain resource for first signal can be same as a length of an occupied time domain resource (e.g., NDoppler) . The number of occupied frequency resource for first signal can be Mg. The Mg can be determined by the maximum delay tap, for example, if the maximum delay tap is lmax, the number of occupied frequency domain resource for first signal can be 2lmax+1. The total guard overhead can be NDopplerMg-1. NDoppler can be total time domain resource of the first signal.
[0114] Method-2: For the first signal with reduced guard symbols, the number of occupied time domain resource for first signal can be Ng. The Ng can be determined by the maximum Doppler tap. For example, if the maximum Doppler tap is kmax, the number of occupied time domain resource for first signal can be 4kmax+1. The number of occupied frequency domain resource for first signal can be Mg. The Mg can be determined by the maximum delay tap. For example, if the maximum delay tap is lmax, the number of frequency domain resource for first signal can be 2lmax+1. The total guard overhead can be NgMg-1.
[0115] The number of the occupied frequency resource (s) for the first signal (e.g., Mg) can be equal to a length of the occupied frequency domain resource (e.g., MDelay) . For example, Ng and Mg can be equal to NDoppler and MDelay, wherein NDoppler and MDelay can be the size of time-frequency domain resource for the first signal which have been defined in Implementation Example-1.
[0116] For the resource in T-F domain including MDelayNDoppler resource elements, the number of first signal can be one or greater than one. In some embodiments, when a number of the first signal is equal to one or is greater than one, a position of the first signal can be in a center of a plurality of resource elements. If the number of first signal is only one, the position of first signal can be in the center of the NDoppler*Mg or Ng*Mg or NDoppler*MDelay resource elements. If the number of first signal includes more than one signal, the position of each first signal can be in the center of the NDoppler*Mg or Ng*Mg resource elements. The MDelayNDoppler DD resource can be divided into multiple NDoppler*Mg or Ng*Mg resources evenly or unevenly. That is to say, each NDoppler*Mg or Ng*Mg resource can be the same size or different, depending on maximum Doppler (e.g., speed) and delay.
[0117] FIG. 9 illustrates an example signaling transmission structure, in accordance with some embodiments of the present disclosure. In FIG. 9, multiple first signals with reduced guard symbols can be divided evenly in the resource for the first signal. FIG. 9 illustrates an example of packing 6 reference signals (RSs) in the continuous resource for the first signal. The non-P shaded area shows the guard area for each first signal, which can be determined by the maximum delay and / or Doppler spreads. P represents the first signal.
[0118] FIG. 10 illustrates an example signaling transmission structure, in accordance with some embodiments of the present disclosure. In FIG. 10, multiple first signals with reduced guard symbols can be divided unevenly in the resource for the first signal. FIG. 10 illustrates an example of packing 6 RSs in the continuous resource for the first signal. The non-P shaded area shows the guard area for each first signal, which can be determined by the maximum delay and Doppler spreads. P represents the first signal.
[0119] Assume that a first signal is placed at (x1, y1) in delay-Doppler domain, and after pre-processing (e.g., transform precoding operation) , OFDM modulation, fading channel, and noise, the receiver can perform OFDM de-modulation and post-processing (e.g., de-transform precoding operation) to obtain the first signal at the receiver. The position of the first signal received can be (x2, y2) , then the corresponding frequency offset can be estimated as (x2-x1)*Doppler resolution, the corresponding timing offset can be estimated as (y1-y2) *delay resolution.
[0120] Signaling for enabling / disabling transform precoding operation of the first signal
[0121] In the implementation examples 1 and 2, the signal structure, pattern, and the relevant signaling are defined. In the present disclosure, the enabling / disabling signaling / conditions of the transform precoding operation of the first signal can be defined. In some embodiments, the signaling for enabling or disabling the transform precoding operation of the first signal may comprise at least one of: a high layer signaling; or a downlink control information (DCI) signaling. The transform precoding operation of the first signal can be at least one of: inverse symplectic finite Fourier transform (ISFFT) , symplectic finite Fourier transform (SFFT) , or other pre-processing module / operation, post-processing module / operation. For example, the following method can be considered. Signaling for enabling the transform precoding operation (e.g., pre-processing module / operation, post-processing module / operation) to process the first signal can be a high layer signaling, a downlink control information (DCI) signaling (if data channel allowed) .
[0122] Conditions for enabling / disabling transform precoding operation of the first signal
[0123] In some embodiments, the condition for enabling or disabling the transform precoding operation of the first signal may comprise at least one of: when a speed of the first wireless network node exceeds a certain threshold; when a frequency band of the first wireless network node operating exceeds a certain threshold; or when the first wireless network node operates in a higher frequency band. For example, conditions for enabling transform precoding operation (e.g., pre-processing module / operation, post-processing module / operation) to process the first signal may include at least one of: when the network or UE speed exceeds a certain threshold; when a frequency band of the first wireless network node operating exceeds a certain threshold; or when the network or UE operates in a higher frequency band.
[0124] Implementation Example 3: Relationship between the resource of first signal and second signal
[0125] In some embodiments, the relationship between the resources of the first signal and the second signal may comprise at least one of: a mapping relationship of a downlink (DL) synchronization signal (e.g., a synchronization signal block (SSB) ) can be defined, wherein the resources of the first signal can be determined by a DL synchronization signal, the DL synchronization signal can be associated with an index of a beam, and the resources of the second signal can be determined by the resources of the first signal; the mapping relationship between the DL synchronization signal and the resource of the second signal can be reused, wherein the resources of the first signal and the second signal can be associated with the same DL synchronization signal, and the DL synchronization signal can be associated with the index of the beam; the mapping relationship between the DL synchronization signal and the resource of the second signal can be reused, wherein the resources of the second signal can be determined by the DL synchronization signal, the DL synchronization signal can be associated with the index of the beam, and the resources of the first signal can be determined by the resources of the second signal; the resources of the first signal can be associated with the second signal in an increasing order of first time, and then frequency; or the resources of the first signal can be associated with the second signal in an increasing order of first frequency, and then time.
[0126] For the relationship between the resource of the first signal and the second signal (e.g., DL synchronization signal / RO) , at least one of following methods can be supported.
[0127] A new DL synchronization signal (e.g., SSB) mapping relationship can be defined. The resource of first signal can be associated with / determined by the downlink synchronization signal. The DL synchronization signal (e.g., SSB) can be associated with different beam corresponding to specific beam index. The resource of second signal can be associated with / determined by the resource of first signal (e.g., can be new mapping rules compared with mapping rules) . The mapping of SSB, first signal resource, and / or ROs can be determined based on new mapping rules.
[0128] When a UE selects a certain beam corresponding to a specific beam index, the resource of the first signal can be determined. The UE may determine the resource of the second signal (e.g., ROs) based on the determined first signal resource. The UE may send the first signal and the second signal (e.g., PRACH) on the first signal resource and the second signal resource (e.g., RACH occasion) corresponding to that beam.
[0129] If N < 1, N may indicate that each SSB corresponds to N consecutive first signal, and N consecutive first signal corresponds to N consecutive ROs for the second signal.
[0130] If N = 1, N may indicate that each SSB corresponds to each first signal, and each first signal corresponds to the each ROs for the second signal.
[0131] If N>1, N may indicate that N SSBs corresponds to each first signal, and each first signal corresponds to the each ROs for the second signal .
[0132] In other method, existing SSB mapping relationship can be reused. The resource of the first signal and the second signal (e.g., RO (s) ) can be associated with the same downlink synchronization signal. The DL synchronization signal (e.g., SSB) can be associated with different beam corresponding to specific beam index (can be legacy mapping rules) .
[0133] When a UE selects a certain beam corresponding to a specific beam index, the resource of the first signal and the second signal (e.g., ROs) can be determined. The UE may send the first signal and the second signal (e.g., PRACH) on the first signal resource and the second signal resource (e.g., RACH occasion) corresponding to that beam.
[0134] If N < 1, N may indicate that each SSB corresponds to N consecutive ROs for second signal and N consecutive first signal.
[0135] If N = 1, N may indicate that each SSB corresponds to each RO for the second signal and each first signal.
[0136] If N > 1, N may indicate that N SSBs corresponds to a RO for the second signal and a first signal.
[0137] In other method, existing SSB mapping relationship can be reused. The resource of the second signal can be associated with the downlink synchronization signal. The DL synchronization signal (e.g., SSB) can be associated with different beam corresponding to specific beam index (can be legacy mapping rules) . The resource of the first signal can be associated with / determined by the resource of the second signal.
[0138] When a UE selects a certain beam corresponding to a specific beam index, the resource of the second signal (e.g., ROs) can be determined. The UE may determine the resource of the first signal based on the determined second signal resource (e.g., RO) . The UE may send the first signal and the second signal (e.g., PRACH) on the first signal resource and the second signal resource (e.g., RACH occasion) corresponding to that beam.
[0139] If N < 1, N may indicate that each SSB corresponds to N consecutive ROs for the second signal, and N consecutive ROs corresponds to each resource for the first signal. In some embodiments, if N < 1, N may indicate that each SSB corresponds to N consecutive ROs for the second signal, and N consecutive ROs corresponds to N consecutive resource of the first signal.
[0140] If N = 1, N may indicate that each SSB corresponds to each RO for the second signal, and each RO corresponding to each first signal, the relationship between SSB, RO, and the first signal is shown in FIG. 11.
[0141] If N > 1, N may indicate that N SSBs corresponds to each RO for the second signal, and each RO corresponds to each resource for the first signal.
[0142] In some embodiments, the first signal in each NDoppler*Mg or Ng*Mg or NDoppler*MDelay resource can be associated with the RO (s) in increasing order of first time, and then frequency or in increasing order of first frequency, and then time.
[0143] In some embodiments, the first signal in each NDoppler*Mg or Ng*Mg or NDoppler*MDelay resource can be associated with the DL synchronization signal (e.g., SSB with specific beam index) / specific preamble in increasing order of first time, and then frequency or in increasing order of first frequency, and then time.
[0144] FIG. 11 illustrates an example signaling transmission structure, in accordance with some embodiments of the present disclosure. FIG. 11 illustrates a relationship between SSB, RO and first signal (s) . In FIG. 11, same shaded area shows the association between SSB, RO, and first signal, one to one each SSB corresponds to each RO, and each RO corresponding to each first signal.
[0145] It should be understood that one or more features from the above / following implementation examples are not exclusive to the specific implementation examples, but can be combined in any manner (e.g., in any priority and / or order, concurrently or otherwise) .
[0146] FIG. 12 illustrates a flow diagram of a method 1200 for signaling transmission structure enhancement. The method 1200 may be implemented using any one or more of the components and devices detailed herein in conjunction with FIGs. 1–11. In overview, the method 1200 may be performed by a first wireless network node (e.g., a UE or a BS) , in some embodiments. Additional, fewer, or different operations may be performed in the method 1200 depending on the embodiment. At least one aspect of the operations is directed to a system, method, apparatus, or a computer-readable medium.
[0147] A first wireless network node (e.g., a user equipment (UE) or a base station (BS)) may determine a configuration message associated with a first signal and a second signal. The first wireless network node may process the first signal and the second signal for transmission, according to the configuration message. In some embodiments, the first signal can be processed sequentially by a transform precoding operation resulting in a block of complex-valued symbols and baseband signal generation operation resulting in a time-continuous signal. In some embodiments, the second signal can be processed by a baseband signal generation operation resulting in a time-continuous signal.
[0148] In some embodiments, the first signal can be mapped to at least one resource, which is associated with at least one of following resources: a delay domain resource, a Doppler domain resource. In some embodiments, the at least one resource is determined by at least one of:the delay domain resource is associated with a frequency domain resource; or the Doppler domain resource is associated with a time domain resource. In some embodiments, the association of the resource between different domain may include at least one of following operations: a transform precoding operation, an inverse symplectic finite Fourier transform operation, a pulse shaping filter operation, or a symplectic finite Fourier transform operation.
[0149] In some embodiments, the configuration message may comprise / indicate at least one of:a location relationship of resources in a time-frequency (TF) domain between the first signal and the second signal; a size of a resource in the TF domain for the first signal; a starting position or an ending position of the resource in the TF domain of the first signal; a subcarrier spacing of the first signal; a pattern of the first signal; a signaling for enabling or disabling the transform precoding operation of the first signal; a condition for enabling or disabling the transform precoding operation of the first signal; or a relationship between resources of the first signal and the second signal (e.g., a downlink synchronization signal , uplink signal, downlink signal, or a signal carried in RO (e.g., physical random access signal) ) . In some embodiments, the location relationship of resources in the TF domain may comprise at least one of: a resource of the first signal can be configured in the TF domain before or after at least one random access channel (RACH) occasion (RO) in a frequency domain of one or more consecutive RACH slots; a resource of the first signal can be configured as a frequency domain multiplexed (FDMed) resource with at least one RO in one or more consecutive RACH slots; a resource of the first signal can be configured in the TF domain before or after at least one RO in a time domain of one RACH slot; a resource of the first signal can be configured as a time division multiplexed (TDMed) resource with at least one RO in one RACH slot; a resource of the first signal can be configured in the TF domain between a plurality of ROs in the time domain of at least two consecutive RACH slots; a resource of the first signal can be configured as a TDMed resource between a plurality of ROs in at least two consecutive RACH slots; or a resource of the first signal can be partially configured as at least one RO of at least one or more consecutive RACH slots.
[0150] In some embodiments, the size of the resource in the TF time domain for the first signal can be determined according to at least one of: a length of an occupied time domain resource; or a length of an occupied frequency domain resource. In some embodiments, the length of the occupied time domain resource / grid / symbol (e.g., NDoppler) can be at least one of: same as a length of a resource of at least one random access channel (RACH) occasion (RO) in one or more consecutive random access channel (RACH) slots; same as a length of a resource in a PRACH slot; same as a length of consecutive resources between at least two consecutive slots; indicated by a high layer signaling; predefined; or indicated by an index associated with a table. In some embodiments, the length of the occupied frequency domain resource / grid / symbol (e.g., MDelay) can be at least one of: same as a length of a resource of at least one random access channel (RACH) occasion (RO) in one or more consecutive physical random access channel (PRACH) slots; indicated by a high layer signaling; predefined; or indicated by an index associated with a table.
[0151] In some embodiments, the starting position or the ending position of the resource in the TF domain of the first signal can be determined according to at least one of: a starting position or an ending position of the resource in a time domain; or a starting position or an ending position of the resource in a frequency domain. In some embodiments, the starting position of the resource in the time domain can be a starting symbol of a first random access channel (RACH) occasion (RO) in a random access channel (RACH) slot. The starting position of the resource in the time domain can be a starting symbol in a RACH slot. The starting position of the resource in the time domain can be an ending symbol of a RO in the RACH slot. The starting position of the resource in the time domain can be configured by a first high layer signaling. The ending position of the resource in the time domain can be an ending symbol of at least one RO in at least one RACH slot. The ending position of the resource in the time domain can be an ending symbol in at least one RACH slot. The ending position of the resource in the time domain can be a symbol before a starting symbol of a first RO in the RACH slot. The ending position of the resource in the time domain can be configured by the first high layer signaling or a second high layer signaling.
[0152] In some embodiments, the starting position of the resource in the frequency domain can be a resource block (RB) after an ending RB of a random access channel (RACH) occasion (RO) in a random access channel (RACH) slot. The starting position of the resource in the frequency domain can be a starting RB of a first RO in the RACH slot. The starting position of the resource in the frequency domain can be configured by a first high layer signaling. The ending position of the resource in the frequency domain can be the ending RB of the RO in the RACH slot. The ending position of the resource in the frequency domain can be configured by the first high layer signaling or a second high layer signaling.
[0153] In some embodiments, the subcarrier spacing of the first signal can be at least one of: same as a subcarrier spacing of a downlink (DL) synchronization signal; same as a subcarrier spacing of system information; same as a subcarrier spacing of a physical downlink control channel (PDCCH) ; same as a subcarrier spacing of a physical downlink shared channel (PDSCH) ; same as a subcarrier spacing of a physical broadcast channel (PBCH) ; same as a subcarrier spacing of a physical random access channel (PRACH) ; same as a subcarrier spacing of a physical uplink control channel (PUCCH) ; same as a subcarrier spacing of a physical uplink shared channel (PUSCH) ; or configured by a high layer signaling.
[0154] In some embodiments, the pattern of the first signal may comprise at least one of: the first signal with full guard symbols, or the first signal with reduced guard symbols. The first signal may comprise at least one pilot. A first resource of the pilot can be independent of the second signal or embedded within the second signal. In some embodiments, the first resource of the first signal can be determined by at least one of: the number of occupied time domain resource (s) for the first signal can be same as a length of an occupied time domain resource, wherein a number of occupied frequency resource (s) for the first signal can be determined by a maximum delay tap; or the number of the occupied time domain resource (s) for the first signal can be determined by a maximum Doppler tap, and the number of the occupied frequency resource (s) for the first signal can be determined by the maximum delay tap; or the number of the occupied time domain resource (s) for the first signal (e.g., Ng) can be equal to a length of the occupied time domain resource (e.g., NDoppler) , and the number of the occupied frequency resource (s) for the first signal (e.g., Mg) can be equal to a length of the occupied frequency domain resource (e.g., MDelay) . In some embodiments, when a number of the first signal is equal to one or is greater than one, a position of the first signal can be in a center of a plurality of resource elements.
[0155] In some embodiments, the signaling for enabling or disabling the transform precoding operation of the first signal may comprise at least one of: a high layer signaling; or a downlink control information (DCI) signaling. The transform precoding operation of the first signal can be at least one of: an inverse symplectic finite Fourier transform (ISFFT) operation, a symplectic finite Fourier transform (SFFT) operation, a pulse shaping filter operation, or other pre-processing operation, post-processing operation.
[0156] In some embodiments, the condition for enabling or disabling the transform precoding operation of the first signal may comprise at least one of: when a speed of the first wireless network node exceeds a certain threshold; when the first wireless network node operates in a higher frequency band, or when the frequency band the first wireless network operating exceeds a certain threshold..
[0157] In some embodiments, the relationship between the resources of the first signal and the second signal may comprise at least one of: a mapping relationship of a downlink (DL) synchronization signal (e.g., a synchronization signal block (SSB) ) can be defined, wherein the resources of the first signal can be determined by a DL synchronization signal, the DL synchronization signal can be associated with an index of a beam, and the resources of the second signal can be determined by the resources of the first signal; the mapping relationship between the DL synchronization signal and the resource of the second signal can be reused, wherein the resources of the first signal and the second signal can be associated with the same DL synchronization signal, and the DL synchronization signal can be associated with the index of the beam; the mapping relationship between the DL synchronization signal and the resource of the second signal can be reused, wherein the resources of the second signal can be determined by the DL synchronization signal, the DL synchronization signal can be associated with the index of the beam, and the resources of the first signal can be determined by the resources of the second signal; the resources of the first signal can be associated with the second signal in an increasing order of first time, and then frequency; or the resources of the first signal can be associated with the second signal in an increasing order of first frequency, and then time.
[0158] In some embodiments, a second wireless network node (e.g., a UE or a BS) may transmit a configuration message associated with a first signal and a second signal to a first wireless network node (e.g., a UE or a BS) . The first wireless network node may determine the configuration message associated with the first signal and the second signal. The first wireless network node may process the first signal and the second signal for transmission, according to the configuration message.
[0159] While various embodiments of the present solution have been described above, it should be understood that they have been presented by way of example only, and not by way of limitation. Likewise, the various diagrams may depict an example architectural or configuration, which are provided to enable persons of ordinary skill in the art to understand example features and functions of the present solution. Such persons would understand, however, that the solution is not restricted to the illustrated example architectures or configurations, but can be implemented using a variety of alternative architectures and configurations. Additionally, as would be understood by persons of ordinary skill in the art, one or more features of one embodiment can be combined with one or more features of another embodiment described herein. Thus, the breadth and scope of the present disclosure should not be limited by any of the above-described illustrative embodiments.
[0160] It is also understood that any reference to an element herein using a designation such as "first, " "second, " and so forth does not generally limit the quantity or order of those elements. Rather, these designations can be used herein as a convenient means of distinguishing between two or more elements or instances of an element. Thus, a reference to first and second elements does not mean that only two elements can be employed, or that the first element must precede the second element in some manner.
[0161] Additionally, a person having ordinary skill in the art would understand that information and signals can be represented using any of a variety of different technologies and techniques. For example, data, instructions, commands, information, signals, bits and symbols, for example, which may be referenced in the above description can be represented by voltages, currents, electromagnetic waves, magnetic fields or particles, optical fields or particles, or any combination thereof.
[0162] A person of ordinary skill in the art would further appreciate that any of the various illustrative logical blocks, modules, processors, means, circuits, methods and functions described in connection with the aspects disclosed herein can be implemented by electronic hardware (e.g., a digital implementation, an analog implementation, or a combination of the two) , firmware, various forms of program or design code incorporating instructions (which can be referred to herein, for convenience, as "software" or a "software module) , or any combination of these techniques. To clearly illustrate this interchangeability of hardware, firmware and software, various illustrative components, blocks, modules, circuits, and steps have been described above generally in terms of their functionality. Whether such functionality is implemented as hardware, firmware or software, or a combination of these techniques, depends upon the particular application and design constraints imposed on the overall system. Skilled artisans can implement the described functionality in various ways for each particular application, but such implementation decisions do not cause a departure from the scope of the present disclosure.
[0163] Furthermore, a person of ordinary skill in the art would understand that various illustrative logical blocks, modules, devices, components and circuits described herein can be implemented within or performed by an integrated circuit (IC) that can include a general purpose processor, a digital signal processor (DSP) , an application specific integrated circuit (ASIC) , a field programmable gate array (FPGA) or other programmable logic device, or any combination thereof. The logical blocks, modules, and circuits can further include antennas and / or transceivers to communicate with various components within the network or within the device. A general purpose processor can be a microprocessor, but in the alternative, the processor can be any conventional processor, controller, or state machine. A processor can also be implemented as a combination of computing devices, e.g., a combination of a DSP and a microprocessor, a plurality of microprocessors, one or more microprocessors in conjunction with a DSP core, or any other suitable configuration to perform the functions described herein.
[0164] If implemented in software, the functions can be stored as one or more instructions or code on a computer-readable medium. Thus, the steps of a method or algorithm disclosed herein can be implemented as software stored on a computer-readable medium. Computer-readable media includes both computer storage media and communication media including any medium that can be enabled to transfer a computer program or code from one place to another. A storage media can be any available media that can be accessed by a computer. By way of example, and not limitation, such computer-readable media can include RAM, ROM, EEPROM, CD-ROM or other optical disk storage, magnetic disk storage or other magnetic storage devices, or any other medium that can be used to store desired program code in the form of instructions or data structures and that can be accessed by a computer.
[0165] In this document, the term "module" as used herein, refers to software, firmware, hardware, and any combination of these elements for performing the associated functions described herein. Additionally, for purpose of discussion, the various modules are described as discrete modules; however, as would be apparent to one of ordinary skill in the art, two or more modules may be combined to form a single module that performs the associated functions according embodiments of the present solution.
[0166] Additionally, memory or other storage, as well as communication components, may be employed in embodiments of the present solution. It will be appreciated that, for clarity purposes, the above description has described embodiments of the present solution with reference to different functional units and processors. However, it will be apparent that any suitable distribution of functionality between different functional units, processing logic elements or domains may be used without detracting from the present solution. For example, functionality illustrated to be performed by separate processing logic elements, or controllers, may be performed by the same processing logic element, or controller. Hence, references to specific functional units are only references to a suitable means for providing the described functionality, rather than indicative of a strict logical or physical structure or organization.
[0167] Various modifications to the embodiments described in this disclosure will be readily apparent to those skilled in the art, and the general principles defined herein can be applied to other embodiments without departing from the scope of this disclosure. Thus, the disclosure is not intended to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the novel features and principles disclosed herein, as recited in the claims below.
Claims
1.A method comprising:determining, by a first wireless network node, a configuration message associated with a first signal and a second signal; andprocessing, by the first wireless network node, the first signal and the second signal for transmission, according to the configuration message.2.The method of claim 1, wherein the first signal is to be processed sequentially by a transform precoding operation resulting in a block of complex-valued symbols and a baseband signal generation operation resulting in a time-continuous signal.3.The method of claim 1, wherein the second signal is to be processed by a baseband signal generation operation resulting in a time-continuous signal.4.The method of claim 2, wherein the first signal is mapped to at least one resource, which is associated with at least one of following resources: a delay domain resource, or a Doppler domain resource.5.The method of the claim 4, wherein the at least one resource is determined by at least one of:the delay domain resource is associated with a frequency domain resource; orthe doppler domain resource is associated with a time domain resource.6.The method of claim 1, wherein the configuration message comprises at least one of:a location relationship of resources in a time-frequency (TF) domain between the first signal and the second signal;a size of a resource in the TF domain for the first signal;a starting position or an ending position of the resource in the TF domain of the first signal;a subcarrier spacing of the first signal;a pattern of the first signal;a signaling for enabling or disabling a transform precoding operation of the first signal;a condition for enabling or disabling the transform precoding operation of the first signal; ora relationship between resources of the first signal and the second signal.7.The method of claim 6, wherein the location relationship of resources in the TF domain comprises at least one of:a resource of the first signal is configured in the TF domain before or after at least one random access channel (RACH) occasion (RO) in a frequency domain of one or more consecutive RACH slots;a resource of the first signal is configured as a frequency domain multiplexed (FDMed) resource with at least one RO in one or more consecutive RACH slots;a resource of the first signal is configured in the TF domain before or after at least one RO in a time domain of one RACH slot;a resource of the first signal is configured as a time division multiplexed (TDMed) resource with at least one RO in one RACH slot;a resource of the first signal is configured in the TF domain between a plurality of ROs in the time domain of at least two consecutive RACH slots;a resource of the first signal is configured as a TDMed resource between a plurality of ROs in at least two consecutive RACH slots; ora resource of the first signal is partially configured as at least one RO of at least one or more consecutive RACH slots.8.The method of claim 6, wherein the size of the resource in the TF domain for the first signal is determined according to at least one of:a length of an occupied time domain resource; ora length of an occupied frequency domain resource.9.The method of claim 8, wherein the length of the occupied time domain resource is at least one of:same as a length of a resource of at least one random access channel (RACH) occasion (RO) in one or more consecutive random access channel (RACH) slots;same as a length of a resource in a PRACH slot;same as a length of consecutive resources between at least two consecutive slots;indicated by a high layer signaling;predefined; orindicated by an index associated with a table.10.The method of claim 8, wherein the length of the occupied frequency domain resource is at least one of:same as a length of a resource of at least one random access channel (RACH) occasion (RO) in one or more consecutive physical random access channel (PRACH) slots;indicated by a high layer signaling;predefined; orindicated by an index associated with a table.11.The method of claim 6, wherein the starting position or the ending position of the resource in the TF domain of the first signal is determined according to at least one of:a starting position or an ending position of the resource in a time domain; ora starting position or an ending position of the resource in a frequency domain.12.The method of claim 11, wherein at least one of:the starting position of the resource in the time domain is a starting symbol of a first random access channel (RACH) occasion (RO) in a random access channel (RACH) slot;the starting position of the resource in the time domain is a starting symbol in a RACH slot;the starting position of the resource in the time domain is an ending symbol of a RO in the RACH slot;the starting position of the resource in the time domain is configured by a first high layer signaling;the ending position of the resource in the time domain is an ending symbol of at least one RO in at least one RACH slot;the ending position of the resource in the time domain is an ending symbol in at least one RACH slot;the ending position of the resource in the time domain is a symbol before a starting symbol of a first RO in the RACH slot; orthe ending position of the resource in the time domain is configured by the first high layer signaling or a second high layer signaling.13.The method of claim 11, wherein at least one of:the starting position of the resource in the frequency domain is a resource block (RB) after an ending RB of a random access channel (RACH) occasion (RO) in a random access channel (RACH) slot;the starting position of the resource in the frequency domain is a starting RB of a first RO in the RACH slot;the starting position of the resource in the frequency domain is configured by a first high layer signaling;the ending position of the resource in the frequency domain is the ending RB of the RO in the RACH slot; orthe ending position of the resource in the frequency domain is configured by the first high layer signaling or a second high layer signaling.14.The method of claim 6, wherein the subcarrier spacing of the first signal is at least one of:same as a subcarrier spacing of a downlink (DL) synchronization signal;same as a subcarrier spacing of system information;same as a subcarrier spacing of a physical downlink control channel (PDCCH) ;same as a subcarrier spacing of a physical downlink shared channel (PDSCH) ;same as a subcarrier spacing of a physical broadcast channel (PBCH) ;same as a subcarrier spacing of a physical random access channel (PRACH) ;same as a subcarrier spacing of a physical uplink control channel (PUCCH) ;same as a subcarrier spacing of a physical uplink shared channel (PUSCH) ; orconfigured by a high layer signaling.15.The method of claim 6, wherein the pattern of the first signal comprises at least one of: the first signal with full guard symbols, or the first signal with reduced guard symbols,wherein the first signal comprises at least one pilot, and a first resource of the pilot is independent of the second signal or embedded within the second signal.16.The method of claim 15, wherein the first resource of the first signal is determined by at least one of:the number of occupied time domain resource (s) for the first signal is same as a length of an occupied time domain resource, wherein a number of occupied frequency resource (s) for the first signal is determined by a maximum delay tap;the number of the occupied time domain resource (s) for the first signal is determined by a maximum Doppler tap, and the number of the occupied frequency resource (s) for the first signal is determined by the maximum delay tap; orthe number of the occupied time domain resource (s) for the first signal is equal to a length of the occupied time domain resource, and the number of the occupied frequency resource (s) for the first signal is equal to a length of the occupied frequency domain resource.17.The method of claim 15, wherein:when a number of the first signal is equal to one or is greater than one, a position of the first signal is in a center of a plurality of resource elements.18.The method of claim 6, wherein the signaling for enabling or disabling the transform precoding operation of the first signal comprises at least one of:a high layer signaling; ora downlink control information (DCI) signaling.19.The method of claim 6, wherein the condition for enabling or disabling the transform precoding operation of the first signal comprises at least one of:when a speed of the first wireless network node exceeds a certain threshold; orwhen the first wireless network node operates in a higher frequency band.20.The method of claim 6, wherein the relationship between the resources of the first signal and the second signal comprises at least one of:a mapping relationship of a downlink (DL) synchronization signal is defined, wherein the resources of the first signal are determined by a DL synchronization signal, the DL synchronization signal is associated with an index of a beam, and the resources of the second signal are determined by the resources of the first signal;the mapping relationship between the DL synchronization signal and the resource of the second signal is reused, wherein the resources of the first signal and the second signal are associated with the same DL synchronization signal, and the DL synchronization signal is associated with the index of the beam;the mapping relationship between the DL synchronization signal and the resource of the second signal is reused, wherein the resources of the second signal are determined by the DL synchronization signal, the DL synchronization signal is associated with the index of the beam, and the resources of the first signal are determined by the resources of the second signal;the resources of the first signal are associated with the second signal in an increasing order of first time, and then frequency; orthe resources of the first signal are associated with the second signal in an increasing order of first frequency, and then time.21.A method comprising:transmitting, by a second wireless network node to a first wireless network node, a configuration message associated with a first signal and a second signal,wherein the first wireless network node determines the configuration message associated with the first signal and the second signal, and the first wireless network node processes the first signal and the second signal for transmission, according to the configuration message.22.A non-transitory computer readable medium storing instructions, which when executed by at least one processor, cause the at least one processor to perform the method of any one of claims 1-21.23.An apparatus comprising:at least one processor configured to perform the method of any one of claims 1-21.
Citation Information
Patent Citations
Transmission configuration method, transmission configuration determination method, base station and terminal
CN108024268A
Signal configuration and self-adaption method and device and related equipment
CN116981078A
Signal transmission methods and apparatuses, nodes, and storage media
US20230300892A1
Data transmission method and apparatus
WO2021159258A1