Resource configuration method and device

Abstract

A resource configuration method and device. The method comprises: a terminal device receives configuration information from a network device, wherein the configuration information is used for configuring a transmission bandwidth of a waveform for the terminal device, so that the terminal device can transmit data with the network device on the basis of the transmission bandwidth. The transmission bandwidth is determined on the basis of a sequence spreading factor, the sequence spreading factor is a preset value, and the waveform generation comprises performing, on the basis of the sequence spreading factor, sequence spreading and frequency-domain spectral shaping (FDSS) on a symbol sequence carried by the waveform. A transmission bandwidth is allocated to a terminal device by means of a sequence spreading factor, so as to ensure the communication capacity or increase the communication capacity on the basis of a given sequence spreading factor (i.e., on the basis of ensuring the OBO gain and PAPR gain).

Description

A resource configuration method and apparatus

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to the Chinese Patent Application No. 202410544394.0, filed on April 30, 2024, and entitled "A Resource Configuration Method and Apparatus", the content of which is incorporated herein by reference in its entirety. TECHNICAL FIELD

[0003] The present application relates to the field of communication technology, and in particular to a resource configuration method and apparatus. BACKGROUND

[0004] Before a signal is transmitted through an antenna, the signal power is boosted by a power amplifier (PA). When the PA input signal power is high, the PA enters a nonlinear region, which causes nonlinear distortion to the signal, such as in-band distortion and out-of-band distortion. In order to reduce the nonlinear distortion of the PA to the signal, PA input power backoff or PA output power backoff (OBO) can be performed. The backoff amount is related to the peak-to-average power ratio (PAPR) of the signal. The PAPR describes the amplitude of the signal fluctuation. The higher the PAPR, the greater the range of input power fluctuation, and the more power value needs to be backed off.

[0005] Frequency-domain spectral shaping (FDSS) processing can be used to reduce the PAPR of a single-carrier signal (such as Discrete Fourier Transform spreading OFDM (DFT-s-OFDM)), thereby reducing the OBO and improving transmission performance. However, FDSS processing reduces the energy of subcarriers located at the edges of the signal transmission bandwidth, which degrades the demodulation performance of the data carried on these subcarriers. To this end, redundancy is generally added to the data carried on these subcarriers before FDSS is performed, which reduces the communication capacity. SUMMARY

[0006] Embodiments of the present application provide a resource configuration method and apparatus for increasing communication capacity without changing the communication OBO gain and PAPR gain.

[0007] In a first aspect, a resource configuration method is provided, which can be applied to a terminal device. The terminal device can be a terminal device, or a chip, unit or module in a terminal device, or a communication device with terminal function. Or a chip, unit or module in a communication device with terminal function. The following description takes the execution subject as a terminal device. The method can include the following steps: the terminal device receives configuration information from a network device, the configuration information being used to configure a transmission bandwidth of a waveform for the terminal device, so that the terminal device can transmit data with the network device based on the transmission bandwidth. The transmission bandwidth is determined based on a sequence expansion factor, the sequence expansion factor being a preset value, and the generation of the waveform includes sequence expansion and frequency domain spectral shaping (FDSS) processing on a symbol sequence carried by the waveform based on the sequence expansion factor.

[0008] In the above implementation, the transmission bandwidth is associated with the sequence expansion factor a, the sequence expansion factor a is non-negative, and the preset value can be multiple. That is, the sequence expansion factor can take different values, such as 0.5, 0.75, 1, or 1 / 3, 3 / 7, 1 / 2, etc. The preset value can be empirically preset, or can be agreed upon by the terminal device and the network device in advance. The sequence expansion factor is used to determine the redundancy ratio (for example, the proportion of the amount of redundant data to the transmission bandwidth), that is, before FDSS, sequence expansion is performed on the symbol sequence carried by the waveform according to the sequence expansion factor, to introduce redundant data. The transmission bandwidth can be determined based on the sequence expansion factor a in the following two ways:

[0009] The first way: the network device pre-allocates a transmission bandwidth with a resource block number L for the terminal device, then determines a bandwidth expansion factor γ according to the used sequence expansion factor a, and expands the transmission bandwidth according to the bandwidth expansion factor γ to obtain a transmission bandwidth with a resource block number L'. It can be understood that L' = L*(1+γ), where γ is non-negative.

[0010] The second way: the network device directly determines a transmission bandwidth with a resource block number L' according to the used sequence expansion factor a.

[0011] As can be seen, without changing the sequence expansion factor a (that is, without changing the redundancy ratio), by increasing the transmission bandwidth (that is, L' is greater than L), the amount of non-redundant data can be increased, thereby improving the communication capacity. At the same time, the PAPR gain and OBO gain brought by FDSS are maintained.

[0012] In a possible implementation, the transmission bandwidth determined when the sequence expansion factor is a first preset value is greater than or equal to the transmission bandwidth determined when the sequence expansion factor is a second preset value, and the first preset value is greater than the second preset value.

[0013] In this implementation, the first preset value a1 (e.g., 1) > the first preset value a2 (e.g., 0.5), and the transmission bandwidth determined based on a1 is greater than or equal to the transmission bandwidth determined based on a2. That is, the transmission bandwidth is positively correlated with the sequence spreading factor a, i.e., the greater the value of the sequence spreading factor a, the greater the transmission bandwidth allocated to the terminal device by the network device, so as to increase the amount of non-redundant data and improve the communication capacity. Optionally, when the sequence spreading factor a is equal to the first threshold value, the transmission bandwidth allocated to the terminal device reaches a maximum value, and when the sequence spreading factor a is greater than the first threshold value, the transmission bandwidth allocated to the terminal device remains the maximum value (i.e., no longer changes or increases).

[0014] In a possible implementation, the transmission bandwidth is further determined based on a window function used by the FDSS.

[0015] In this implementation, it can be understood that the transmission bandwidth is also associated with the window function. In the above first mode, it can be said that the window function is associated with the bandwidth spreading factor g. That is, the window function used by the FDSS is also used to determine the bandwidth spreading factor g, i.e., the bandwidth spreading factor g is determined according to the sequence spreading factor a and the window function used by the FDSS, so as to increase the transmission bandwidth allocated to the terminal device.

[0016] Optionally, the FDSS uses a Nyquist pulse, such as a Raised Cosine, a Root Raised Cosine (RRC), etc., and in this case, the parameter factor of the window function is a roll-off factor b. That is, the transmission bandwidth is further determined based on the roll-off factor b. It can be understood that the roll-off factor b can take different values (e.g., 0.5, 1, etc.), and therefore, in the case where the sequence spreading factor a is given (e.g., a has taken the value 0.5), the transmission bandwidth determined when the roll-off factor b is a first value is greater than or equal to the transmission bandwidth determined when the roll-off factor b is a second value, where the first value (e.g., 1) is greater than the second value (e.g., 0.5), i.e., the transmission bandwidth is positively correlated with the roll-off factor b. Similarly, when the roll-off factor b is equal to the first threshold value, the transmission bandwidth allocated to the terminal device reaches a maximum value, and when the sequence spreading factor b is greater than the first threshold value, the transmission bandwidth allocated to the terminal device no longer increases.

[0017] Optionally, in the case where the sequence spreading factor a is given, the transmission bandwidth determined when the window function used by the FDSS processing is a first window function is greater than or equal to the transmission bandwidth determined when the window function used by the FDSS processing is a second window function, where the first window function (such as RRC with a roll-off factor β of 1) corresponds to a faster edge attenuation rate than the second window function (such as the FDSS window function with a time-domain impulse response of [0.28 1 0.28]). That is, the transmission bandwidth is positively correlated with the edge attenuation rate corresponding to the window function used by the FDSS processing.

[0018] It can be understood that, based on the above implementation, the transmission bandwidth can be determined according to the sequence spreading factor a and the window function used by the FDSS processing.

[0019] In a possible implementation, the transmission bandwidth is further determined based on a carrier modulation type corresponding to the waveform.

[0020] In this implementation, it can be understood that the transmission bandwidth is further associated with the carrier modulation type. The carrier modulation type can include offset quadrature amplitude modulation (OQAM), quadrature amplitude modulation (QAM), and orthogonal frequency division multiplexing (OFDM). Therefore, in the case where the sequence spreading factor a is given, the transmission bandwidth determined when the carrier modulation type corresponding to the waveform is OQAM is greater than or equal to the transmission bandwidth determined when the carrier modulation type corresponding to the waveform is QAM; and in the case where the sequence spreading factor a is given, the transmission bandwidth determined when the carrier modulation type corresponding to the waveform is QAM is greater than or equal to the transmission bandwidth determined when the carrier modulation type corresponding to the waveform is OFDM.

[0021] It can be understood that, based on the above implementation, the transmission bandwidth can be determined according to the sequence spreading factor a, the window function used by the FDSS processing, and the carrier modulation type corresponding to the waveform (or the carrier modulation type used).

[0022] In a possible implementation, the transmission bandwidth is further determined based on a modulation order used.

[0023] In a possible implementation, the transmission bandwidth determined when the modulation order used by the waveform is a first modulation order is greater than or equal to the transmission bandwidth determined when the modulation order used by the waveform is a second modulation order, where the first modulation order is less than the second modulation order.

[0024] In this implementation, it can be understood that the transmission bandwidth is also associated with the modulation order, and the transmission bandwidth is negatively related to the modulation order. That is, in the case of a given sequence spreading factor a, the smaller the value of the modulation order is, the larger the transmission bandwidth allocated by the network device to the terminal device is, so as to increase the transmission bandwidth allocated to the terminal device.

[0025] It can be understood that, based on the above implementation, the transmission bandwidth can be determined according to the sequence spreading factor a, the window function used in the FDSS processing, the carrier modulation type corresponding to the waveform, and the modulation order used in the waveform.

[0026] Optionally, the modulation order can be determined based on a modulation and coding scheme (MCS). For example, in the new radio protocol TS38.214 MCS table Table 6.1.4.1-1, MCS index 2 corresponds to a modulation order of 2, and MCS index 10 corresponds to a modulation order of 4.

[0027] In a possible implementation, the transmission bandwidth is also determined based on the power level of the terminal device.

[0028] In this implementation, it can be understood that the transmission bandwidth is also associated with the power level of the terminal. Optionally, the transmission bandwidth determined when the power level of the terminal device is a first level is greater than or equal to the transmission bandwidth determined when the power level of the terminal device is a second level, where the first level is less than the second level. That is, the transmission bandwidth is negatively related to the power level.

[0029] It can be understood that, based on the above implementation, the transmission bandwidth can be determined according to the sequence spreading factor a, the window function used in the FDSS processing, the carrier modulation type corresponding to the waveform, the modulation order used in the waveform, and the power level of the terminal device.

[0030] In a possible implementation, the lowest frequency position or the highest frequency position of the transmission bandwidth is located in the guard band of the channel bandwidth in which the transmission bandwidth is located.

[0031] In this implementation, it can be understood that the redundant data part is located in the guard band, so as to reduce the length of the transmission bandwidth actually occupying the channel bandwidth, which is helpful to improve the communication capacity of the channel bandwidth from the system perspective.

[0032] In a possible implementation, the sequence expansion factor is a ratio of a difference between the length of the symbol sequence carried by the transmission bandwidth and the length of the symbol sequence carried by the waveform and the length of the symbol sequence carried by the waveform; or, the sequence expansion factor is a ratio of a difference between the length of the symbol sequence carried by the transmission bandwidth and the length of the symbol sequence carried by the waveform and the length of the symbol sequence carried by the transmission bandwidth. The length of the symbol sequence carried by the transmission bandwidth can also be described as the number of subcarriers in the transmission bandwidth.

[0033] It can be understood that the symbol sequence carried by the transmission bandwidth includes redundant data, and the symbol sequence carried by the waveform does not include redundant data.

[0034] In a possible implementation, the terminal device sends capability information to the network device, and the capability information includes one or more of the following:

[0035] The supported maximum transmission bandwidth, the supported highest modulation order, the supported carrier modulation type, the supported window function, and the power class.

[0036] In a possible implementation, the transmission bandwidth is an uplink transmission bandwidth, and therefore the terminal device can send data to the network device on the transmission bandwidth. Alternatively, the transmission bandwidth is a downlink transmission bandwidth, and therefore the terminal device can receive data from the network device on the transmission bandwidth and demodulate the data carried on the transmission bandwidth.

[0037] In a second aspect, a resource configuration method is provided. The method can be used for a network device, which can be a network equipment, or a chip, a unit or a module with network equipment function, or a communication device with network equipment function, or a chip, a unit or a module inside a communication device with network equipment function. The method is described below with the execution subject being a network device. The method can include the following steps: the network device sends configuration information to a terminal device, where the configuration information is used to configure a transmission bandwidth of a waveform for the terminal device, and therefore the network device can transmit data with the terminal device based on the transmission bandwidth. The transmission bandwidth is determined based on a sequence expansion factor, the sequence expansion factor is a preset value, and the generation of the waveform includes sequence expansion and frequency domain spectral shaping (FDSS) processing on a symbol sequence carried by the waveform based on the sequence expansion factor.

[0038] In a possible implementation, when the sequence expansion factor is a first preset value, the determined transmission bandwidth is greater than or equal to a transmission bandwidth determined when the sequence expansion factor is a second preset value, and the first preset value is greater than the second preset value.

[0039] In a possible implementation, the transmission bandwidth is further determined based on a window function used by the FDSS.

[0040] In a possible implementation, the transmission bandwidth is further determined based on a carrier modulation type corresponding to the waveform.

[0041] In a possible implementation, the transmission bandwidth is further determined based on a modulation order used by the waveform.

[0042] In a possible implementation, when the modulation order used by the waveform is a first modulation order, the determined transmission bandwidth is greater than or equal to a transmission bandwidth determined when the modulation order used by the waveform is a second modulation order, and the first modulation order is less than the second modulation order.

[0043] In a possible implementation, the transmission bandwidth is further determined based on a power class of the terminal device.

[0044] In a possible implementation, a lowest frequency position or a highest frequency position of the transmission bandwidth is located in a guard band of a channel bandwidth in which the transmission bandwidth is located.

[0045] In a possible implementation, the sequence spreading factor is a ratio of a difference between a length of a symbol sequence carried by the transmission bandwidth and a length of a symbol sequence carried by the waveform and the length of the symbol sequence carried by the waveform, or a ratio of the difference between the length of the symbol sequence carried by the transmission bandwidth and the length of the symbol sequence carried by the waveform and a length of a symbol sequence carried by the transmission bandwidth. The length of the symbol sequence carried by the transmission bandwidth can also be described as a number of subcarriers in the transmission bandwidth.

[0046] In a possible implementation, the network device receives capability information from the terminal device, and the capability information includes one or more of the following:

[0047] a maximum transmission bandwidth supported, a highest modulation order supported, a carrier modulation type supported, a window function supported, and a power class.

[0048] In a possible implementation, the transmission bandwidth is an uplink transmission bandwidth, and therefore, the network device can receive data from the terminal device on the transmission bandwidth and demodulate data carried on the transmission bandwidth. Alternatively, the transmission bandwidth is a downlink transmission bandwidth, and therefore, the network device can transmit data to the terminal device on the transmission bandwidth.

[0049] In the method, the transmission bandwidth is described with reference to the method in the first aspect, which is not described herein again.

[0050] In a third aspect, a communication apparatus is provided, which comprises means or modules for performing the method in any one of the first aspect or the second aspect.

[0051] In a fourth aspect, a communication apparatus is provided, which comprises one or more processors configured to perform the method in any one of the first aspect or the second aspect.

[0052] In a possible implementation, the communication apparatus further comprises one or more memories; and the one or more memories store one or more programs causing the communication apparatus to perform the method in any one of the first aspect or the second aspect when the one or more programs are executed by the one or more processors.

[0053] In a fifth aspect, a chip system is provided, which comprises at least one chip and a memory, and the at least one chip is configured to read and execute a program stored in the memory to implement the method in any one of the first aspect or the second aspect.

[0054] In a sixth aspect, a readable storage medium is provided, which comprises a program causing a device to perform the method in any one of the first aspect or the second aspect when the program is run on the device.

[0055] In a seventh aspect, a program product is provided, which causes a device to perform the method in any one of the first aspect or the second aspect when the program product is run on the device.

[0056] On the basis of the implementation of each of the above aspects, the embodiments of the present application can be further combined to provide more implementations.

[0057] The technical effects that can be achieved in any one of the third aspect to the seventh aspect can be described with reference to the technical effects that can be achieved in the first aspect and / or the second aspect, and the repeated parts will not be discussed. BRIEF DESCRIPTION OF DRAWINGS

[0058] FIG. 1 is a schematic diagram of an architecture of a mobile communication system to which embodiments of the present application are applied;

[0059] FIG. 2 is a schematic diagram of a bandwidth to which embodiments of the present application are applied;

[0060] FIG. 3 is a schematic diagram of signal processing of an OFDM system provided by the present application;

[0061] FIG. 4 is a schematic diagram of frequencies corresponding to different roll-off factors to which embodiments of the present application are applied;

[0062] FIG. 5 is a schematic diagram of a power curve of a power amplifier provided by the present application;

[0063] Figure 6 is a diagram of an OQAM bit mapping provided by the present application;

[0064] Figure 7 is a diagram of a subcarrier energy variation provided by the present application;

[0065] Figure 8 is a diagram of a signal processing of another OFDM system provided by the present application;

[0066] Figure 9 is a diagram of a sequence spreading provided by the present application;

[0067] Figure 10 is a diagram of another sequence spreading provided by the present application;

[0068] Figure 11 is a diagram of a resource configuration method provided by the present application;

[0069] Figure 12 is a diagram of a spectrum of different sequence spreading factors provided by the present application;

[0070] Figure 13 is a diagram of a filter time domain response provided by the present application;

[0071] Figure 14 is a diagram of a spectrum of different window functions provided by the present application;

[0072] Figure 15 is a diagram of a transmission bandwidth provided by the present application;

[0073] Figure 16 is a diagram of a spectrum provided by the present application;

[0074] Figure 17 is a diagram of another transmission bandwidth provided by the present application;

[0075] Figure 18 is a diagram of a structure of a first communication device provided by the present application;

[0076] Figure 19 is a diagram of a structure of a second communication device provided by the present application. DETAILED DESCRIPTION

[0077] The embodiments of the present application can be applied to various communication systems, for example, a long term evolution (LTE) system, an LTE frequency division duplex (FDD) system, an LTE time division duplex (TDD) system, a universal mobile telecommunication system (UMTS) system, a worldwide interoperability for microwave access (WIMAX) communication system, a 5th generation (5G) system or a new radio (NR) system, or a future communication system, or other similar communication system, etc.

[0078] FIG. 1 is a schematic diagram of an architecture of a communication system 1000 to which embodiments of the present application can be applied. As shown in FIG. 1, the communication system includes a radio access network 100 and a core network 200. Optionally, the communication system 1000 can further include an Internet 300. The radio access network 100 can include at least one radio access network device (e.g., 110a and 110b in FIG. 1) and at least one terminal (e.g., 120a-120j in FIG. 1). The terminal is connected to the radio access network device in a wireless manner. The radio access network device is connected to the core network in a wireless or wired manner. The core network device and the radio access network device can be independent and different physical devices, or the functions of the core network device and the logical functions of the radio access network device can be integrated on the same physical device, or a physical device can integrate the functions of part of the core network device and part of the radio access network device. The terminals can be connected to each other and the radio access network devices can be connected to each other in a wired or wireless manner. FIG. 1 is only a schematic diagram. The communication system can further include other network devices, such as a wireless relay device and a wireless backhaul device, which are not shown in FIG. 1.

[0079] The radio access network device can be a base station, an evolved NodeB (eNodeB), a transmission reception point (TRP), a next generation NodeB (gNB) in a 5th generation (5G) mobile communication system, a base station in a future mobile communication system, or an access node in a WiFi system, etc. It can also be a module or unit that completes part of the functions of a base station, for example, it can be a central unit (CU) or a distributed unit (DU). The CU here completes the functions of the radio resource control protocol and the packet data convergence protocol (PDCP) of the base station, and can also complete the function of the service data adaptation protocol (SDAP); the DU completes the functions of the radio link control layer and the medium access control (MAC) layer of the base station, and can also complete part or all of the functions of the physical layer. For specific descriptions of the above-mentioned protocol layers, reference can be made to the relevant technical specifications of the 3rd generation partnership project (3GPP). The radio access network device can be a macro base station (such as 110a in FIG. 1), or a micro base station or indoor station (such as 110b in FIG. 1), or a relay node or donor node, etc. The embodiments of the present application do not limit the specific technologies and specific device forms adopted by the radio access network device.

[0080] The terminal can also be referred to as a terminal device, user equipment (UE), mobile station, mobile terminal (MT), etc. The terminal can be widely applied to various scenarios, such as device-to-device (D2D), vehicle to everything (V2X) communication, machine-type communication (MTC), internet of things (IOT), virtual reality, augmented reality, industrial control, automatic driving, remote medical treatment, smart power grid, smart furniture, smart office, smart wear, smart transportation, smart city, etc. The terminal can be a mobile phone, tablet computer, computer with wireless transceiver function, wearable device, vehicle, unmanned aerial vehicle, helicopter, airplane, ship, robot, mechanical arm, smart home device, etc. Embodiments of the present application do not limit the specific technology and specific device form of the terminal.

[0081] The network device and the terminal can be fixed in position or movable. The network device and the terminal can be deployed on land, including indoors or outdoors, handheld or vehicle-mounted; can also be deployed on water surface; can also be deployed on airplanes, balloons and artificial satellites. Embodiments of the present application do not limit the application scenarios of the network device and the terminal.

[0082] The roles of the network device and the terminal can be relative, for example, the helicopter or unmanned aerial vehicle 120i in FIG. 1 can be configured as a mobile network device, and for the terminal 120j that accesses the wireless access network 100 through 120i, the unmanned aerial vehicle 120i is a network device; but for the network device 110a, 120i is a terminal, that is, 110a and 120i communicate through a wireless air interface protocol. Of course, 110a and 120i can also communicate through an interface protocol between network devices and network devices, at this time, relative to 110a, 120i is also a network device. Therefore, the network device and the terminal can be collectively referred to as a communication apparatus, 110a and 110b in FIG. 1 can be referred to as a communication apparatus with network device function, and 120a-120j in FIG. 1 can be referred to as a communication apparatus with terminal function.

[0083] The network device and the terminal, the network device and the network device, and the terminal and the terminal can communicate through the licensed spectrum, the unlicensed spectrum, or both the licensed spectrum and the unlicensed spectrum; can communicate through the spectrum below 6 gigahertz (GHz), the spectrum above 6 GHz, or both the spectrum below 6 GHz and the spectrum above 6 GHz. The embodiments of the present application do not limit the spectrum resources used for wireless communication.

[0084] In the embodiments of the present application, the functions of the network device can also be performed by a module (such as a chip) in the network device, or by a control subsystem containing network device functions. The control subsystem containing network device functions herein can be a control center in the above-mentioned application scenarios such as smart grid, industrial control, intelligent transportation, and smart city. The functions of the terminal can also be performed by a module (such as a chip or a modem) in the terminal, or by a device containing terminal functions.

[0085] In the embodiments of the present application, the network device sends a downlink signal or downlink information to the terminal, and the downlink information is carried on a downlink channel; the terminal sends an uplink signal or uplink information to the base station, and the uplink information is carried on an uplink channel. In order to communicate with the base station, the terminal needs to establish a wireless connection with the cell controlled by the base station. The cell that establishes a wireless connection with the terminal is called the service cell of the terminal.

[0086] In order to make the purpose, technical solutions and advantages of the present application clearer, the present application will be further described in detail below with reference to the drawings. The specific operation methods in the method embodiments can also be applied to the device embodiments or system embodiments.

[0087] In the following, some technologies and terms related to the embodiments of the present application are explained and described in order to facilitate understanding by those skilled in the art.

[0088] (1) Channel bandwidth, transmission bandwidth, guard band

[0089] Referring to FIG. 2, for a wireless communication system, the standard channel bandwidth can also be referred to as the carrier bandwidth, and the channel bandwidth can be 10 MHz or 20 MHz, etc.

[0090] 5G new radio (NR) is not like long term evolution (LTE) where all the spectrum resources in a standard channel bandwidth are used for data transmission. The spectrum resources on the left and right sides of a standard channel bandwidth are divided into guard bands to avoid interference from outside the channel bandwidth when data is transmitted. The spectrum resources actually used for data transmission are referred to as the transmission bandwidth, or maximum transmission bandwidth. The guard bands on the left and right sides can be asymmetric.

[0091] In LTE, the transmission bandwidth of a terminal device and the transmission bandwidth of a network device must be consistent. In 5G NR, the 3GPP protocol specifies that a system can support a larger transmission bandwidth. From the perspective of a terminal device, some services of a specific terminal device can not require a larger transmission bandwidth, and a larger transmission bandwidth also means a higher terminal cost. Therefore, the 3GPP protocol proposes the concept of a band width part (BWP) for 5G NR. A BWP refers to a continuous spectrum resource (i.e., a BWP) configured by a network device to a terminal device, and the terminal device transmits data on the continuous spectrum resource. The BWP can be smaller than or equal to the maximum transmission bandwidth, so as to flexibly configure the transmission bandwidth of the network device and the terminal device. It can be understood that different terminal devices can be configured with different BWPs.

[0092] (2) Orthogonal frequency division multiplexing (OFDM)

[0093] FIG. 3 is a schematic diagram of signal processing of an OFDM system. The input signal of the signal transmitting end is a frequency domain signal {S(p)}. The frequency domain signal is converted into an M-dimensional data block S k = [S(kM), S(kM+1), …, S(kM+M-1)] T by a serial-to-parallel (S / P) module, where subscript k represents the OFDM symbol number, and superscript T represents transposition. Through subcarrier mapping, the M data carried by S k modulate N sc subcarriers of N sc = M subcarriers, and the remaining (N-N sc ) subcarriers are modulated by data 0. The N-dimensional data vector X k is obtained by N-point inverse discrete fourier transform (IDFT). N complex time domain sampling points xk =[x k (0),x k (1),…,x k (N-1)] T Among them, x k (n), n=0,1,…,N-1 can be written as the following formula 1:

[0094] In Formula 1, x k (n'), n' = 0, 1, ..., N-1 represents the output of the subcarrier mapping, e represents the Euler constant, and j represents the imaginary unit. 2 =-1. The subcarrier mapping rule is shown in Formula 2 below:

[0095] In Formula 2, n0 is an integer, S k (l) is S k The l-th element, l = 0, 1, ..., N sc -1.

[0096] x k After the parallel-to-serial conversion module, a guard field needs to be inserted at the beginning of each OFDM symbol to eliminate inter-symbol interference (ISI) caused by multipath propagation (such as radio signals reaching the receiver through two or more paths). The guard field is obtained by adding a cyclic prefix (CP) to the beginning of each OFDM symbol. One possible implementation is to copy x... k The last G sample points are then appended to x. k At the beginning, the time-domain OFDM signal is obtained. In other words, an OFDM symbol contains valid data x k And a cyclic prefix (or redundant data). After that, it undergoes digital-to-analog conversion and is transmitted as an OFDM signal through the antenna at the signal transmitting end.

[0097] OFDM signals are transmitted through a channel and received by a signal receiver. The OFDM signals are then demodulated through inverse processing, namely, through analog-to-digital conversion, removal of CP, serial-to-parallel conversion module, N-point discrete Fourier transform (DFT), decarrier mapping, and parallel-to-serial conversion module to obtain the frequency domain signal {S(p)}.

[0098] In one possible implementation, S kThe modulation symbols and / or the redundant signal sampling points can be included. The modulation symbols can be modulation symbols obtained by modulating a (coded) bit stream. The modulation methods can include pulse amplitude modulation (PAM), phase shift keying (PSK), quadrature amplitude modulation (QAM), amplitude phase shift keying (APSK), etc. The redundant signal sampling points can include phase tracking reference signal (PTRS) sampling points, demodulation reference signals, tone reservation signals, etc.

[0099] It should be understood that when the transform point number N satisfies certain constraints, such as N being a power of 2, 3, 5, the IDFT can also be implemented by an efficient inverse fast fourier transform (IFFT). Correspondingly, the DFT can also be implemented by an efficient FFT. In the following, the IDFT and the IFFT can be interchangeable, and the DFT and the fast fourier transform (FFT) can be interchangeable.

[0100] N sc is the number of subcarriers corresponding to the OFDM signal transmission bandwidth. In the foregoing, N sc is equal to M. It should be understood that N sc may also be greater than M. For example, in the present application, the S k of length M can be subjected to sequence expansion, and it is assumed that the length of the expanded sequence is equal to N sc . Therefore, N sc ≥ M.

[0101] (3) Discrete Fourier Transform spreading OFDM (DFT-s-OFDM)

[0102] Referring to the above OFDM, as shown in FIG. 3, the DFT-s-OFDM defines a data block s k transmitted in the time domain, and performs DFT (discrete fourier transform) processing on the data block s k before the OFDM processing process, that is, performing an M-point DFT operation on each data block s k containing M data, and thereby obtaining a data block S kBy this operation, the DFT-s-OFDM signal has the characteristics of a single carrier, with a peak to average power ratio (PAPR) much lower than that of OFDM and other multi-carrier signals. Therefore, under the same power amplifier, DFT-s-OFDM can provide greater output power and higher power amplifier efficiency, thereby achieving the purpose of improving coverage and reducing energy consumption.

[0103] In a possible implementation manner, the s k The modulation symbols can be modulation symbols obtained by modulating a (coded) bit stream. The modulation manner can include PAM, PSK, QAM, offset quadrature amplitude modulation (OQAM), APSK, etc. The redundant signal sampling points can include PTRS sampling points, unique words, zeros, etc.

[0104] (4) QAM

[0105] The present application relates to, but is not limited to, Quadrature Phase Shift Keying (QPSK), 16QAM, 64QAM, and other QAM schemes. QPSK can also be referred to as 4QAM. Taking a QPSK modulation mapper as an example, it maps two consecutive bits to one QPSK symbol, as shown in the following formula 3:

[0106] where b(2i) and b(2i+1) represent the 2i-th and 2i+1-th bits, respectively, and d(i) represents the i-th QPSK symbol.

[0107] Taking a 16QAM modulation mapper as an example, it maps four consecutive bits to one 16QAM symbol, as shown in the following formula 4:

[0108] where b(4i), b(4i+1), b(4i+2), and b(4i+3) represent the 4i-th, 4i+1-th, 4i+2-th, and 4i+3-th bits, respectively, and d(i) represents the i-th 16QAM symbol.

[0109] (5) Roll-off factor / coefficient

[0110] Roll-off factor / coefficient is generally used to describe the steepness of Nyquist filter frequency response function with frequency. Assuming considering a raised cosine (a kind of Nyquist filter), Fig. 4 gives the frequency response under different roll-off factors (denoted by β below, β is 0, 0.25, 0.5, 1 respectively). It can be seen that the frequency response with a rectangular shape (corresponding to β = 0) is the steepest. In specific applications, it is difficult to implement a filter with a rectangular window frequency response. The use of roll-off can reduce the difficulty of filter implementation, but increases the bandwidth.

[0111] In a possible implementation, the bandwidth beyond the Nyquist frequency 1 / 2T is called transition bandwidth, for which the roll-off factor is defined as β = transition bandwidth / Nyquist frequency. In combination with Fig. 4, when β = 0, the transition bandwidth is 0; when β = 1, the transition bandwidth is 1 / 2T, equal to the Nyquist frequency.

[0112] (6) Power amplifier (PA)

[0113] Before the signal is transmitted through the antenna, it will pass through the PA to boost the signal power. The method to describe the behavior of the PA can be the AM-AM (Amplitude Modulation-Amplitude Modulation) and AM-PM (Amplitude Modulation-Phase Modulation) characteristics of the PA. Referring to Fig. 5, Fig. 5 provides an AM-AM curve of a PA, which describes the output power as a function of the input power. It can be seen that the amplifier has a linear region. Within the linear region, the output power of the amplifier increases linearly with the input power, or it can be understood that the PA gain (i.e. the ratio of the PA output power and the input power) remains unchanged, or the AM-AM curve slope remains unchanged. As the input power continues to increase, the PA enters a nonlinear region, the output power no longer increases linearly with the input power, the gain is compressed, and the AM-AM curve slope decreases. When the saturation output power (Saturation Output Power) is reached, i.e. the output power no longer increases with the increase of the input power, the slope is 0.

[0114] The impact of this non-linear characteristic of PA on the transmitted signal is embodied in in-band distortion and out-band distortion. Among them, the in-band distortion can be manifested as distortion of the signal in amplitude and phase, which deteriorates the signal demodulation / detection performance. The out-band distortion can be manifested as signal spectrum expansion / regeneration, which will increase the interference to the adjacent channel users. In the NR protocol, the error vector magnitude (EVM) and the in-band emission (IBE) are used to describe the requirements of the transmitted signal quality (i.e. related to in-band distortion), and the occupied bandwidth (OBW), the adjacent channel leakage ratio (ACLR), and the spectrum emission mask (SEM) are used to describe the spectrum radiation requirements (i.e. related to the out-band distortion of the signal).

[0115] The EVM and the IBE are related to the modulation order. As shown in the following Table 1, the low-order modulation has a greater requirement for EVM, or in other words, the low-order modulation can tolerate a greater error.

[0116] Table 1

[0117] In order to alleviate the impact of the non-linearity of the PA, the PA can be made to work as much as possible in the linear region by reducing the power of the input signal, i.e. input power backoff (IBO) or output power backoff (OBO), that is, this is a method at the cost of reducing the efficiency of the PA.

[0118] In one possible implementation, the OBO for EVM is defined as the OBO required to meet the EVM index, the OBO for IBE is defined as the OBO required to meet the IBE index, the OBO for OBW is defined as the OBO required to meet the OBW index, the OBO for ACLR is defined as the OBO required to meet the ACLR index, and the OBO for SEM is defined as the OBO required to meet the SEM index. The final OBO is equal to the maximum value of the OBO required by each index, i.e. OBO = max (OBO for EVM, OBO for IBE, OBO for OBW, OBO for ACLR, OBO for SEM); wherein max represents the maximum value.

[0119] (7) Peak-to-Average Power Ratio (PAPR)

[0120] The modulated signal x(t) looks like a waveform with varying amplitude in time domain. Peak power and average power are two ways to measure the amplitude of the signal. PAPR is used to describe the amplitude of the signal fluctuation, which is expressed by the ratio of the peak power to the average power in dB value within a certain time interval (such as t0 to t1), as shown in the following formula 5:

[0121] where max(|x(t)| 2 ) is the peak power, and mean(|x(t)| 2 ) is the average power.

[0122] The higher the PAPR of the PA input signal x(t) is, the greater the fluctuation range of the input power of the signal is. In order to ensure that the signal is entirely within the linear interval of FIG. 5, the more power value needs to be backed off. Therefore, the signal with low PAPR can reduce the PA OBO, improve the transmission power, and improve the coverage.

[0123] (8) OQAM

[0124] Referring to FIG. 6, FIG. 6 provides an OQAM bit mapping diagram, which can be understood as splitting the complex QAM symbol into a sequence of pure real and pure imaginary numbers that appear alternately on the basis of QAM bit mapping. For example, the QAM bit mapping generates a sequence of 3 complex symbols {z0, z1, z2}, where z0=x0+jy0, z1=x1+jy1, z2=x2+jy2, x0, x1, x2, y0, y1 and y2 are all real numbers. The offset QAM bit mapping generates a sequence of 6 symbols: {x0, jy0, x1, jy1, x2, jy2} or {jy0, x0, jy1, x1, jy2, x2}.

[0125] It should be understood that the phase difference between any two adjacent elements in the sequence of pure real and pure imaginary numbers that appear alternately is 90 degrees or pi / 2. A phase rotation is performed on the sequence of pure real and pure imaginary numbers that appear alternately, such as or to obtain a complex sequence, where θ0 is a constant. The phase difference between any two adjacent elements in the complex sequence is still 90 degrees or pi / 2. In this application, the sequence in which the phase difference between any two adjacent elements is 90 degrees or pi / 2 is called an OQAM sequence.

[0126] Optionally, the real module outputs the real part of the complex symbol sequence {x0+jy0, x1+jy1, x2+jy2,...}, i.e., the sequence {x0, x1, x2,...}; the imag module outputs the imaginary part of the complex symbol sequence {x0+jy0, x1+jy1, x2+jy2,...}, i.e., {jy0, jy1, jy2,...}. If the 2x upsampling module inputs a sequence of length M {x0, x1, x2,..., x(M-1)}, it outputs a sequence of length 2M {x0, 0, x1, 0, x2, 0,..., x(M-1), 0}. If the 2x upsampling module inputs a sequence of length M {jy0, jy1, jy2,..., jy(M-1)}, it outputs a sequence of length 2M {jy0, 0, jy1, 0, jy2, 0,..., jy(M-1), 0}. If the 1 sample delay module inputs a sequence of length 2M {x0, 0, x1, 0, x2, 0,..., x(M-1), 0}, it outputs a sequence of length 2M {0, x0, 0, x1, 0, x2, 0,..., x(M-1)}. If the 1 sample delay module inputs a sequence of length 2M {jy0, 0, jy1, 0, jy2, 0,..., jy(M-1), 0}, it outputs a sequence of length 2M {0, jy0, 0, jy1, 0, jy2, 0,..., jy(M-1)}.

[0127] In splitting mode 1, {x0, 0, x1, 0, x2, 0,..., x(M-1), 0} plus {0, jy0, 0, jy1, 0, jy2, 0,..., jy(M-1)} produces {x0, jy0, x1, jy1,..., x(M-1), jy(M-1)}.

[0128] In splitting mode 2, {0, x0, 0, x1, 0, x2, 0,..., x(M-1)} plus {jy0, 0, jy1, 0, jy2, 0,..., jy(M-1), 0} produces {jy0, x0, jy1, x1,..., jy(M-1), x(M-1)}.

[0129] In summary, it is pointed out that the π / 2-BPSK modulation defined in NR can be regarded as an offset 4QAM or offset QPSK modulation with a phase rotation of π / 4.

[0130] It can be understood that, under the condition of carrying the same number of bits, the length of the OQAM sequence is twice the length of the QAM symbol sequence. Alternatively, it can be understood that the number of resource elements (REs) required to transmit the OQAM sequence is twice the number of REs required to transmit the QAM symbol sequence. However, the frequency domain signal corresponding to the OQAM sequence at most has half of the redundancy. Under the condition of no loss of demodulation performance, the frequency domain redundancy can be removed, so that the minimum bandwidth required to transmit the OQAM sequence is equal to the bandwidth required to transmit the QAM symbol sequence. For this purpose, the above-mentioned DFT-s-OFDM signal generation process inputs s k For the OQAM symbol sequence, it is assumed in the present application that the redundancy of the DFT output result is removed to obtain S k .

[0131] (9) Frequency-domain spectral shaping (FDSS)

[0132] FDSS can be understood as a windowing process performed on the signal S k to be transmitted. The mathematical description can refer to the following formula 6:

[0133] where c[i] is the i-th coefficient of the FDSS window function. is mapped onto N sc =M subcarriers corresponding to the transmission bandwidth. Taking S k [i] as a QPSK symbol with an amplitude of 1, the FDSS window function is a root raised cosine (RRC) with a roll-off factor of 0.2, and N sc =720 REs as an example, FIG. 7 exemplarily shows the amplitude variation of the data carried on the subcarriers with and without FDSS. Among them, S k [i] corresponds to the amplitude without FDSS, corresponds to the amplitude with FDSS.

[0134] As shown in Figure 7, FDSS improves the energy of the intermediate subcarrier. In other words, compared to signals without FDSS processing, the signal with FDSS processing has a more concentrated spectrum, or, more accurately, a smaller OBO and lower out-of-band radiation. Therefore, in integrated sensing and communication (ISAC) scenarios, it can reduce ambiguity function sidelobes and improve sensing performance. Furthermore, FDSS can reduce the PAPR of single-carrier signals (such as DFT-s-OFDM), thereby reducing the nonlinear effect of PA on the signal and improving signal transmission performance.

[0135] As shown in Figure 7, using FDSS reduces the energy of edge subcarriers, thereby deteriorating the demodulation performance of the data carried on the edge subcarriers, such as the bit error rate (BER). Therefore, in order to mitigate or avoid the loss of demodulation performance caused by FDSS and improve demodulation performance, redundancy (also known as introducing a redundant sequence or an extended sequence) is usually added to the data carried on these subcarriers before FDSS processing.

[0136] Referring to Figure 8, input M-dimensional data block S k , for S k Perform sequence expansion to obtain a length equal to N sc sequence Referring to Figure 9, N sc >M, the shaded parts (S1 and S2) are the extended sequences that introduce redundancy, N sc This can be understood as the number of subcarriers corresponding to the OFDM signal transmission bandwidth, and M can be understood as the number of subcarriers occupied by the data to be transmitted (or the effective data). Then, regarding... Performing FDSS yields a length equal to N. sc sequence and The relationship between them can be referenced in Formula 7 below:

[0137] In one possible implementation, the extended sequence can be obtained by copying the symbol sequence corresponding to the valid data. Taking Figure 9 as an example, a portion of the data in the symbol sequence is copied to obtain the extended sequence (including a first extended sequence S1 and a second extended sequence S2). Then, the first extended sequence is added to the end of the symbol sequence, and the second extended sequence is added to the beginning of the symbol sequence, thus obtaining the extended sequence. It is understood that the extended sequence can also be obtained in other ways, and this application does not limit it here.

[0138] get Next, referring to Figure 3, proceed sequentially... Subcarrier mapping, IDFT, and CP are performed to obtain the time-domain OFDM signal. The length of the extended sequence is based on N. sc The sequence expansion factor is determined based on the sequence expansion factor, which is used to determine the length of the symbol sequence of the valid data and the length of the expanded sequence.

[0139] In one possible implementation, the sequence expansion factor α is N. sc The ratio of the difference between M and M to M, that is,

[0140] In one possible implementation, the sequence expansion factor α is N. sc The ratio of the difference between M and the first length, i.e.,

[0141] It is understandable that, given a certain number of subcarriers, the larger α is, the smaller M is, meaning the OFDM signal carries less effective data.

[0142] In one possible implementation, QAM DFT-s-OFDM or OFDM, the corresponding FDSS window function is symmetric. Therefore, the sequence expansion method can refer to the following formula 8:

[0143] Here, mod represents the modulo operation, for example, 12 mod 5 = 2. It should be understood that other sequence expansion methods also exist. For example, for OFDM, the sequence expansion method can be referred to in Formula 9 below:

[0144] Based on the above description, FDSS can reduce the PAPR of the DFT-s-OFDM signal, thereby reducing the OBO of the PA. Table 2 below shows the OBO of the PA under different sequence spread factors.

[0145] Table 2

[0146] The simulation parameters used include: BWP corresponding to 60RB, subcarrier spacing of 30k, channel bandwidth of 25MHz, frequency range 1 (FR1), QPSK symbol, PA model (saturated output power of approximately 29.02dBm), FDSS window function of RRC (sequence spread factor α equals its roll-off coefficient), antenna gain of 5dBi, UE maximum transmit power of 26dBm, and ACLR requirement of 30dB.

[0147] It should be understood that the OBO values in Table 2 are related to the simulation parameters. That is, the OBO values change when the simulation parameters change, but the conclusion that the signal has OBO gain with FDSS processing compared to no FDSS processing does not change.

[0148] As can be seen from Table 2, the OBO of the PA can be reduced by using FDSS, thereby improving the transmission power of the UE, i.e., improving the signal transmission performance. However, sequence spreading actually increases redundancy, and the redundant part occupies the transmission bandwidth but does not transmit new information (i.e., N sc subcarriers actually transmit only M symbols), which results in a decrease in communication capacity. Referring to FIG. 10, the transmission bandwidth allocated to the terminal device carries N sc subcarriers, and when a = 0 (which can be understood as no FDSS processing), the effective data M = N sc transmitted by the transmission bandwidth; and when a = 1, the effective data M < N transmitted by the transmission bandwidth. That is, M < N sc As can be seen, sequence spreading increases redundancy, and when the number of subcarriers is given (or the transmission bandwidth is given), the amount of effective data that can be carried by the OFDM signal decreases, i.e., the communication capacity decreases.

[0149] Therefore, how to improve the capacity of the transmission bandwidth to transmit effective data without changing the sequence spreading factor a (which can be understood as not changing the OBO gain and PAPR gain) is a technical problem to be solved at present. To this end, an embodiment of the present application provides a resource configuration method, which increases the transmission bandwidth configured for the terminal device, utilizes the PAPR gain and OBO gain brought by FDSS, and improves the capacity of the transmission bandwidth to transmit effective data, as shown in the flow of FIG. 11 and the related description.

[0150] The execution subject of the resource configuration method provided by the embodiment of the present application is introduced by taking a network device and a terminal device as an example. The network device in the embodiment of the present application can be a network device, or a chip, unit or module in the network device, such as the access network device 110a or the access network device 110b in the foregoing FIG. 1. The network device can also be a communication device with a network device function or a chip, unit or module inside the communication device with a network device function. The terminal device in the embodiment of the present application can be a terminal device, or a chip, unit or module in the terminal device, such as any terminal shown in the foregoing FIG. 1. The terminal device can also be a communication device with a terminal function or a chip, unit or module inside the communication device with a terminal function. For ease of understanding, the terminal device in the embodiment of the present application is taken as a terminal device or a chip, unit or module inside the terminal device, and the network device is taken as a network device or a chip, unit or module inside the network device.

[0151] The application will be described in further detail below with reference to the drawings. The specific operation methods in the method embodiments can also be applied to the device embodiments or system embodiments.

[0152] Based on the network system architecture shown in FIG. 1 and the content of the above-mentioned related technology, FIG. 11 exemplarily shows a flow diagram of a resource configuration method provided by an embodiment of the application. The scheme in FIG. 11 is introduced by taking the interaction execution of a network device and a terminal device as an example. The related description of the network device and the terminal device is referred to the foregoing content, and will not be described again.

[0153] As shown in FIG. 11, the resource configuration method can include the following steps:

[0154] Step 1101: The network device sends configuration information to the terminal device, the configuration information being used for configuring the transmission bandwidth of a waveform, the transmission bandwidth being determined based on a sequence spreading factor, the sequence spreading factor being a preset value.

[0155] In this flow, the generation of the waveform includes sequence spreading and frequency domain spectral shaping (FDSS) processing on a symbol sequence carried by the waveform based on the sequence spreading factor. To this end, the transmission bandwidth allocated to the terminal device can be determined according to the sequence spreading factor. Optionally, the following describes how to determine the transmission bandwidth in two ways:

[0156] The first way:

[0157] The network device pre-allocates a BWP with an RB number L to the terminal device, and then determines a bandwidth spreading factor γ, so as to expand the BWP according to the bandwidth spreading factor γ to obtain a transmission bandwidth with an RB number L'. Wherein, the bandwidth spreading factor γ can be determined according to at least one of the following: the used sequence spreading factor α, the window function used for FDSS processing, the carrier modulation type corresponding to the waveform, the used modulation order, the power level of the terminal device, etc. Wherein, L' = L*(1+γ), the bandwidth spreading factor γ can be calculated by weighted summation or the like, and the specific calculation method of the bandwidth spreading factor γ is not limited here.

[0158] The second way:

[0159] The network device determines the BWP associated with the parameters required for data transmission with the terminal device from a plurality of BWPs as the BWP' of the terminal device. Wherein, the plurality of BWPs can be determined by the above-mentioned first way, or can be preset according to simulation results or the like, which is not specifically limited here.

[0160] In a possible implementation, the transmission bandwidth is associated with the sequence spreading factor a. The sequence spreading factor a can be understood as the a used by the terminal device when communicating with the network device. The a can be one of preset values, such as a plurality of values (0.5, 0.75, 1, 3, or 1 / 3, 3 / 7, 1 / 2, etc., which are not limited in the present application) pre-agreed by the terminal device and the network device. The terminal device selects one of the values as the sequence spreading factor a (for example, 0.5) when performing sequence spreading.

[0161] Referring to FIG. 12, the spectrum of the signal is more distant from the spectrum of the SEM when a = 3, that is, the spectrum of the signal is more concentrated when a = 3. That is, the transmission bandwidth is positively correlated with the sequence spreading factor a, that is, the greater the value of the sequence spreading factor a, the greater the transmission bandwidth determined based on the a. For example, when a = 0.25, the transmission bandwidth determined based on "a = 0.25" is 60 RBs; when a = 0.5, the transmission bandwidth determined based on "a = 0.5" is 90 RBs; and when a = 1, the transmission bandwidth determined based on "a = 1" is 120 RBs.

[0162] It can be understood that different values of the sequence spreading factor a have a mapping relationship with transmission bandwidths of different numbers of RBs, and therefore the network device can directly allocate a transmission bandwidth of a corresponding number of RBs to the terminal device according to the mapping relationship by using the sequence spreading factor a (that is, the value of the sequence spreading factor a at this time).

[0163] In a possible implementation, the transmission bandwidth is associated with the window function. Referring to FIG. 13, the edge attenuation speed of the RRC (denoted as window function 2) with a roll-off factor β of 1 is faster than the edge attenuation speed of the FDSS window function (denoted as window function 1) with a time domain impulse response of [0.28 1 0.28]. Based on this, FIG. 14 provides the spectrum of the PA output signal under the design of the two window functions, and it can be seen that the spectrum of the signal is closer to the spectrum of the SEM when the window function 1 is used, that is, the spectrum of the signal is more concentrated when the window function 2 is used than when the window function 1 is used. In order to consider the IBE constraint, a greater transmission bandwidth is required for the communication capacity, and therefore the transmission bandwidth required when the window function 2 is used is greater than the transmission bandwidth required when the window function 1 is used in the case where the sequence spreading factor a is given. That is, the transmission bandwidth is positively correlated with the edge attenuation speed corresponding to the window function.

[0164] Based on this, in the case of a given sequence expansion factor α, the transmission bandwidth determined based on different window functions is different. For example, α = 0.25 and window function 1, the determined transmission bandwidth is 60 RBs; α = 0.25 and window function 2, the determined transmission bandwidth is 75 RBs; α = 0.5 and window function 1, the determined transmission bandwidth is 90 RBs; α = 0.5 and window function 2, the determined transmission bandwidth is 105 RBs; α = 1 and window function 1, the determined transmission bandwidth is 120 RBs; α = 1 and window function 2, the determined transmission bandwidth is 135 RBs.

[0165] It can be understood that different window functions have a mapping relationship with transmission bandwidths of different RB quantities, and therefore, based on the window function used by the terminal device when performing FDSS processing, the network device can directly allocate the terminal device a transmission bandwidth of a corresponding RB quantity according to the mapping relationship.

[0166] In a possible implementation, the window function is a Nyquist pulse RRC. Based on this, the transmission bandwidth is associated with a roll-off factor β, and the OBO information of the PA is shown in Table 3 below.

[0167] Table 3

[0168] The used parameters include an OQAM DFT-s-OFDM waveform, a modulation order of 2 (that is, QPSK modulation is used), a roll-off factor β of 0.5 and 1, a transmission bandwidth corresponding to an RB quantity of 60, 62, 64, and a maximum UE power of 26 dBm. It can be seen that when the transmission bandwidth is 62 RBs, for β = 0.5 or β = 1, the OBO for SEM determines the PA OBO, and the UE can transmit data at a maximum power of 26 dBm. When the transmission bandwidth is 64 RBs, for β = 0.5, the OBO for IBE (a value of 5) determines the PA OBO, and the UE cannot transmit data at a maximum power of 26 dBm; for β = 1, the OBO for SEM still determines the PA OBO, and the UE can transmit data at a maximum power of 26 dBm. Therefore, β = 1 supports a larger RB quantity of the transmission bandwidth than β = 0.5, or in other words, β = 1 supports a larger transmission bandwidth than β = 0.5, that is, the transmission bandwidth is positively correlated with the roll-off factor β.

[0169] In a possible implementation, when the sequence spreading factor a is given, the transmission bandwidth determined based on different values of the roll-off factor b is different (that is, the greater the value of the roll-off factor b, the greater the transmission bandwidth). For example, when a = 0.25 and b = 0.5, the determined transmission bandwidth is 60 RBs; when a = 0.25 and b = 1, the determined transmission bandwidth is 75 RBs; when a = 0.5 and b = 0.5, the determined transmission bandwidth is 90 RBs; when a = 0.5 and b = 1, the determined transmission bandwidth is 105 RBs; when a = 1 and b = 0.5, the determined transmission bandwidth is 120 RBs; and when a = 1 and b = 1, the determined transmission bandwidth is 135 RBs.

[0170] It can be understood that different values of the roll-off factor b have a mapping relationship with transmission bandwidths of different RB quantities, and therefore the network device can allocate, for the terminal device, a transmission bandwidth of a corresponding RB quantity according to the mapping relationship, by using the roll-off factor b used in the FDSS processing (that is, the value of the roll-off factor b at this time).

[0171] In a possible implementation, the transmission bandwidth is associated with a carrier modulation type. Taking an example in which the carrier modulation type includes single-carrier OQAM, single-carrier QAM, and OFDM, when the sequence spreading factor a is given, the transmission bandwidth determined based on OQAM is greater than or equal to the transmission bandwidth determined based on QAM, and the transmission bandwidth determined based on QAM is greater than or equal to the transmission bandwidth determined based on OFDM.

[0172] It can be understood that different carrier modulation types have a mapping relationship with transmission bandwidths of different RB quantities, and therefore the network device can allocate, for the terminal device, a transmission bandwidth of a corresponding RB quantity according to the mapping relationship, based on the carrier modulation type corresponding to the waveform (that is, the carrier modulation type required to be used by the terminal device).

[0173] In a possible implementation, the transmission bandwidth is associated with the modulation order. Optionally, in a fixed carrier modulation scheme (such as DFT-s-OFDM) given the sequence spreading factor a, the transmission bandwidth is negatively related to the modulation order. The modulation order can be determined based on a modulation and coding scheme (MCS). For example, according to the new radio protocol TS 38.214 MCS table Table 6.1.4.1-1, the MCS index 2 corresponds to a modulation order of 2, and the MCS index 10 corresponds to a modulation order of 4. The present application does not limit the modulation order. For example, when a = 0.25 and the modulation order is 2, the determined transmission bandwidth is 60 RBs; when a = 0.25 and the modulation order is 4, the determined transmission bandwidth is 75 RBs; when a = 0.5 and the modulation order is 2, the determined transmission bandwidth is 90 RBs; and when a = 0.5 and the modulation order is 4, the determined transmission bandwidth is 105 RBs.

[0174] It can be understood that the transmission bandwidth of different RB numbers has a mapping relationship with different modulation orders, and therefore, based on the modulation order corresponding to the waveform (that is, the modulation order required to be used by the terminal device), the network device can allocate the transmission bandwidth of the corresponding RB number to the terminal device according to the mapping relationship.

[0175] In a possible implementation, the transmission bandwidth is associated with the power class. In the NR protocol, terminal devices are divided into seven categories (that is, corresponding to seven power classes), as shown in Table 4 below.

[0176] Table 4

[0177] For example, based on Table 4, the maximum transmission power of a vehicle-mounted terminal with a power class of 2 is 26 dBm, and the maximum transmission power of a handheld terminal with a power class of 3 is 23 dBm. Based on the above description, the greater the transmit power (positively related to the power class), the smaller the OBO of the PA, and the greater the nonlinear distortion of the PA, and therefore the transmission bandwidth is negatively related to the power class. That is, given the sequence spreading factor a, the transmission bandwidth determined based on different power classes is different (that is, the higher the power class, the smaller the transmission bandwidth). For example, when a = 0.25 and the power class is 2, the determined transmission bandwidth is 60 RBs; when a = 0.25 and the power class is 3, the determined transmission bandwidth is 45 RBs; when a = 0.5 and the power class is 2, the determined transmission bandwidth is 90 RBs; and when a = 0.5 and the power class is 3, the determined transmission bandwidth is 75 RBs.

[0178] It can be understood that different power levels have a mapping relationship with different RB number transmission bandwidths, and therefore, based on the power level of the terminal device, the network device can allocate a corresponding RB number transmission bandwidth to the terminal device according to the mapping relationship.

[0179] It should be understood that different RB number transmission bandwidths can also have a mapping relationship with a plurality of combination modes between the above information (sequence spreading factor α, window function used by FDSS processing, carrier modulation type corresponding to the waveform, modulation order used, and power level of the terminal device), which will not be described in detail herein. For example, different RB number transmission bandwidths have a mapping relationship with the sequence spreading factor α and the window function used by the FDSS processing; or different RB number transmission bandwidths have a mapping relationship with the sequence spreading factor α, the window function used by the FDSS processing, and the carrier modulation type corresponding to the waveform; or different RB number transmission bandwidths have a mapping relationship with the sequence spreading factor α, the window function used by the FDSS processing, the carrier modulation type corresponding to the waveform, and the modulation order corresponding to the waveform; or different RB number transmission bandwidths have a mapping relationship with the sequence spreading factor α, the window function used by the FDSS processing, the carrier modulation type corresponding to the waveform, the modulation order corresponding to the waveform, and the power level of the terminal device.

[0180] In a possible implementation, the above parameters (including the value of the sequence spreading factor α, the window function used by the FDSS processing, the carrier modulation type corresponding to the waveform, the value of the modulation order, and / or the power level of the terminal device) can be sent by the terminal device to the network device before step 1401. For example, the terminal device sends capability information to the network device, and the capability information includes one or more of the following: the maximum transmission bandwidth supported, the highest modulation order supported, the carrier modulation type supported, the window function supported, and the power level.

[0181] In a possible implementation, the configuration information includes first indication information and second indication information. The first indication information indicates the position information of the transmission bandwidth, such as the starting position. The second indication information indicates the RB number carried by the transmission bandwidth, or in other words, the second indication information indicates the length of the symbol sequence carried by the transmission bandwidth, such as the value of the sequence spreading factor α, the window function used by the FDSS processing, the carrier modulation type corresponding to the waveform, the modulation order corresponding to the waveform, the power level of the terminal device, and the like.

[0182] Step 1102: transmitting data based on the transmission bandwidth.

[0183] In this flow, the transmission bandwidth can be the uplink transmission bandwidth and / or the downlink transmission bandwidth.

[0184] Optionally, when the transmission bandwidth is the uplink transmission bandwidth, the terminal device can send data to the network device on the transmission bandwidth; the network device can receive data from the terminal device on the transmission bandwidth, and demodulate the data carried on the transmission bandwidth.

[0185] Optionally, when the transmission bandwidth is the downlink transmission bandwidth, the terminal device can receive data from the network device on the transmission bandwidth, and demodulate the data carried on the transmission bandwidth; the network device can send data to the terminal device on the transmission bandwidth.

[0186] The transmission bandwidth can be understood as a BWP` with a resource block number of L`. In related technologies, the network device directly allocates the required transmission bandwidth BWP to the terminal device, which is irrelevant to the sequence expansion factor α. Referring to FIG. 15, in related technologies, the network device allocates a BWP with a resource block number of L to the terminal device, and because the sequence expansion factor α = 1, it can be determined that the effective data that can be transmitted by the BWP is L / 2 (i.e., M). Based on the above description of the transmission bandwidth, it can be determined that the effective data that can be transmitted by the BWP` is L` / 2 (i.e., M`), because L` is greater than L, so M` is greater than M, that is, the effective data that can be transmitted by the BWP` is more than the effective data that can be transmitted by the BWP, or in other words, the capacity of the BWP` is greater than the capacity of the BWP.

[0187] In addition, referring to FIG. 16, it can be seen that the spectrum of the transmission bandwidth (corresponding to OQAM, α = 1, the spectrum of 64 RBs) is equivalent to the distance between the spectrum of the signal with α = 0 and the spectrum of the SEM, that is, the spectrum width of the transmission bandwidth is equivalent to the spectrum width of the signal with α = 0, and therefore, compared with the transmission bandwidth with α = 0, the transmission bandwidth improves the OBO gain and the PAPR gain on the basis of ensuring the spectrum efficiency; compared with the transmission bandwidth with α = 1, the transmission bandwidth improves the communication capacity on the basis of ensuring the OBO gain and the PAPR gain.

[0188] In a possible implementation manner, part of the transmission bandwidth is located in the guard band of the channel bandwidth, so as to reduce the length of the transmission bandwidth actually occupying the channel bandwidth and improve the communication capacity of the channel bandwidth. Referring to FIG. 17, the shaded part is the part of the transmission bandwidth located in the guard band of the channel bandwidth. It can be seen that different UEs correspond to different transmission bandwidths, for example, UE1 corresponds to the transmission bandwidth on the left, that is, the lowest frequency position of the transmission bandwidth of UE1 is located in the left guard band of the channel bandwidth. UE2 corresponds to the transmission bandwidth on the right, that is, the highest frequency position of the transmission bandwidth of UE2 can be located in the right guard band of the channel bandwidth. In the transmission bandwidth, the part located in the guard band carries redundant data, and the non-redundant data is located in the channel bandwidth, so as to ensure the communication performance.

[0189] The present application increases the amount of non-redundant data by increasing the transmission bandwidth, thereby improving the communication capacity, while maintaining the PAPR gain and OBO gain brought by FDSS, under the condition that the sequence spreading factor a used is given (i.e. the value of the sequence spreading factor a is not changed).

[0190] It can be understood that, in order to implement the functions in the above embodiments, the network device and the terminal device comprise hardware structures and / or software modules corresponding to the functions. Those skilled in the art should easily realize that, in combination with the units and method steps of the examples described in the embodiments disclosed in the present application, the present application can be realized in the form of hardware or a combination of hardware and computer software. Whether a certain function is realized in the form of hardware or computer software driving hardware depends on the specific application scenario and design constraints of the technical solution.

[0191] FIG. 18 and FIG. 19 are structural schematic diagrams of communication devices provided by the embodiments of the present application. These communication devices can be used to implement the functions of the terminal device or the network device in the above method embodiments, and thus can also achieve the beneficial effects possessed by the above method embodiments. In the embodiments of the present application, the communication device can be one of the terminals 120a-120j shown in FIG. 1, can be the base station 110a or 110b shown in FIG. 1, or can be a module (such as a chip) applied to a terminal or a base station.

[0192] As shown in FIG. 18, the first communication device 1800 comprises a processing unit 1810 and a transceiver unit 1820. The first communication device 1800 is used to implement the functions of the terminal device or the network device in the above method embodiments shown in FIG. 11.

[0193] When the first communication device 1800 is used to implement the functions of the terminal device in the method embodiments shown in FIG. 11, the processing unit 1810 is configured to receive configuration information from a network device through the transceiver unit 1820, and transmit data with the network device based on a transmission bandwidth; wherein the configuration information is used to configure a terminal device with a transmission bandwidth of a waveform, the transmission bandwidth is determined based on a sequence spreading factor, the sequence spreading factor is a preset value, and the generation of the waveform comprises sequence spreading and FDSS processing on a symbol sequence carried by the waveform based on the sequence spreading factor.

[0194] When the first communication apparatus 1800 is configured to implement the function of the network device in the method embodiment shown in FIG. 11, the processing unit 1810 is configured to transmit configuration information to a terminal device through the transceiver unit 1820, and transmit data with the terminal device based on the transmission bandwidth; wherein the configuration information is used to configure the terminal device with a transmission bandwidth of a waveform, the transmission bandwidth is determined based on a sequence spreading factor, the sequence spreading factor is a preset value, and the generation of the waveform includes sequence spreading and frequency domain spectral shaping (FDSS) processing on a symbol sequence carried by the waveform based on the sequence spreading factor.

[0195] For more detailed description of the processing unit 1810 and the transceiver unit 1820, please refer to the relevant description in the method embodiment shown in FIG. 11, which will not be repeated here.

[0196] As shown in FIG. 19, the second communication apparatus 1900 includes a processor 1910 and an interface circuit 1920. The processor 1910 and the interface circuit 1920 are coupled to each other. It can be understood that the interface circuit 1920 can be a transceiver or an input / output interface. Optionally, the second communication apparatus 1900 can further include a memory 1930 for storing instructions executed by the processor 1910 or storing input data required by the processor 1910 to run instructions or storing data generated after the processor 1910 runs instructions.

[0197] When the second communication apparatus 1900 is configured to implement the method shown in FIG. 11, the processor 1910 is configured to implement the function of the processing unit 1810, and the interface circuit 1920 is configured to implement the function of the transceiver unit 1820.

[0198] When the above communication apparatus is a chip applied to a terminal device, the terminal chip implements the function of the terminal device in the above method embodiment. The terminal chip receives information from other modules (such as a radio frequency module or an antenna) in the terminal device, and the information is sent by the network device to the terminal chip; or the terminal chip sends information to other modules (such as a radio frequency module or an antenna) in the terminal device, and the information is sent by the terminal device to the network device.

[0199] When the above communication apparatus is a module applied to a network device, the module implements the function of the network device in the above method embodiment. The module receives information from other modules (such as a radio frequency module or an antenna) in the network device, and the information is sent by the terminal to the network device; or the module sends information to other modules (such as a radio frequency module or an antenna) in the network device, and the information is sent by the network device to the terminal. The network device module here can be a baseband chip of the network device, or a DU or other module, and the DU here can be a DU under the open radio access network (O-RAN) architecture.

[0200] It can be appreciated that the processor in the embodiments of the present application can be a central processing unit (CPU), and can also be other general-purpose processors, digital signal processors (DSP), application specific integrated circuits (ASIC), field programmable gate arrays (FPGA) or other programmable logic devices, transistor logic devices, hardware components or any combination thereof. The general-purpose processor can be a microprocessor or any conventional processor.

[0201] In the present application, another example of a communication device is provided, which comprises at least one processor and at least one memory, the at least one processor and the at least one memory are coupled, the at least one memory is configured to store instructions, when the instructions are executed by the at least one processor, the communication device performs the method in the above embodiments. Taking the communication device comprising one processor and one memory as an example, as shown in FIG. 19, the second communication device 1900 comprises one processor 1910 and one memory 1930. The processor 1910 and the memory 1930 are coupled, and the memory 1930 stores part or all of the instructions, when the instructions stored in the memory 1930 are executed by the processor 1910, the second communication device 1900 performs the method performed by the terminal device or the network device in the above embodiments. Optionally, the memory can be integrated in the processor 1910.

[0202] The method steps in the embodiments of the present application can be implemented in hardware, or can be implemented in software instructions executable by a processor. The software instructions can be composed of corresponding software modules, and the software modules can be stored in a random access memory, a flash memory, a read-only memory, a programmable read-only memory, an electrically programmable read-only memory, a register, a hard disk, a mobile hard disk, a CD-ROM or any other form of storage medium well known in the art. An exemplary storage medium is coupled to the processor, so that the processor can read information from the storage medium and write information to the storage medium. The storage medium can also be an integral part of the processor. The processor and the storage medium can be located in an ASIC. In addition, the ASIC can be located in the network device or the terminal. The processor and the storage medium can also exist as discrete components in the network device or the terminal.

[0203] In the above embodiments, all or part of the embodiments can be implemented by software, hardware, firmware or any combination thereof. When implemented by software, all or part of the embodiments can be implemented in the form of a computer program product. The computer program product includes one or more computer programs or instructions. When the computer programs or instructions are loaded and executed on a computer, all or part of the processes or functions described in the embodiments are performed. The computer can be a general purpose computer, a special purpose computer, a computer network, a network device, a user equipment or other programmable apparatus. The computer programs or instructions can be stored in a computer readable storage medium or transferred from one computer readable storage medium to another computer readable storage medium, for example, the computer programs or instructions can be transferred from one website site, computer, server or data center to another website site, computer, server or data center through wired or wireless manner. The computer readable storage medium can be any available medium that can be accessed by a computer or a data storage device such as a server, data center and the like integrated with one or more available media. The available media can be a magnetic medium, such as a floppy disk, a hard disk, a magnetic tape; or an optical medium, such as a digital video disc; or a semiconductor medium, such as a solid state disk. The computer readable storage medium can be a volatile or non-volatile storage medium, or can include both volatile and non-volatile storage media.

[0204] In various embodiments of the present application, the terms and / or descriptions of different embodiments are consistent and can be referred to each other if there is no special description and logical conflict. The technical features in different embodiments can be combined to form new embodiments according to their inherent logical relationship.

[0205] In the present application, "at least one" means one or more, and "multiple" means two or more. The association relationship between the associated objects is described, which means that there can be three kinds of relationships, for example, A and / or B, which can represent the following cases: A exists alone, A and B exist together, and B exists alone, where A and B can be singular or plural. In the literal description of the present application, the character " / ", generally represents that the associated objects before and after are in an "or" relationship; in the formula of the present application, the character " / ", represents that the associated objects before and after are in a "division" relationship. "Including at least one of A, B and C" can mean: including A; including B; including C; including A and B; including A and C; including B and C; including A, B and C.

[0206] It can be understood that various numbers involved in the embodiments of the present application are only distinguished for convenience of description, and do not limit the scope of the embodiments of the present application. The size of the serial number of the above processes does not mean the order of execution, and the execution order of the processes should be determined according to their functions and inherent logic.

Claims

1. A resource configuration method, characterized by, The method comprises: receiving configuration information from a network device, the configuration information being used to configure a transmission bandwidth of a waveform, the transmission bandwidth being determined based on a sequence spreading factor, the sequence spreading factor being a preset value, generation of the waveform comprising sequence spreading and frequency domain spectral shaping (FDSS) processing of a symbol sequence carried by the waveform based on the sequence spreading factor; transmitting data with the network device based on the transmission bandwidth.

2. The method of claim 1, wherein, The transmission bandwidth determined when the sequence spreading factor is a first preset value is greater than or equal to the transmission bandwidth determined when the sequence spreading factor is a second preset value, the first preset value being greater than the second preset value.

3. The method according to claim 1 or 2, characterized in that, The transmission bandwidth is further determined based on a window function used in the FDSS processing.

4. The method according to any one of claims 1 to 3, characterized in that, The transmission bandwidth is further determined based on a carrier modulation type corresponding to the waveform.

5. The method according to any one of claims 1 to 4, characterized in that, The transmission bandwidth is further determined based on a modulation order used in the waveform.

6. The method of claim 5, wherein, The transmission bandwidth determined when the modulation order used in the waveform is a first modulation order is greater than or equal to the transmission bandwidth determined when the modulation order used in the waveform is a second modulation order, the first modulation order being less than the second modulation order.

7. The method according to any one of claims 1 to 6, characterized in that, The transmission bandwidth is further determined based on a power class of the terminal device.

8. The method of claim 1, wherein, A lowest frequency position or a highest frequency position of the transmission bandwidth is located within a guard band of a channel bandwidth in which the transmission bandwidth is located.

9. The method of claim 1, wherein, The sequence spreading factor is a ratio of a difference between a length of a symbol sequence carried by the transmission bandwidth and a length of a symbol sequence carried by the waveform to the length of the symbol sequence carried by the waveform. Alternatively, The sequence spreading factor is a ratio of a difference between a length of a symbol sequence carried by the transmission bandwidth and a length of a symbol sequence carried by the waveform to the length of the symbol sequence carried by the transmission bandwidth.

10. The method according to any one of claims 3-7, characterized in that, The method further comprises: sending capability information to the network device, the capability information comprising one or more of: a maximum transmission bandwidth supported, a highest modulation order supported, a carrier modulation type supported, a window function supported, and a power class.

11. A resource configuration method, comprising: The method comprises: sending configuration information, the configuration information being used to configure a transmission bandwidth of a waveform, the transmission bandwidth being determined based on a sequence spreading factor, the sequence spreading factor being a preset value, generation of the waveform comprising sequence spreading and frequency domain spectral shaping (FDSS) processing of a symbol sequence carried by the waveform based on the sequence spreading factor; transmitting data with a terminal device based on the transmission bandwidth.

12. The method of claim 11, wherein, The transmission bandwidth determined when the sequence spreading factor is a first preset value is greater than or equal to the transmission bandwidth determined when the sequence spreading factor is a second preset value, the first preset value being greater than the second preset value.

13. The method according to claim 11 or 12, characterized in that, The transmission bandwidth is further determined based on a window function used in the FDSS processing.

14. The method according to any one of claims 11-13, characterized in that, The transmission bandwidth is further determined based on a carrier modulation type corresponding to the waveform.

15. The method according to any one of claims 11-14, characterized in that, The transmission bandwidth is further determined based on a modulation order used in the waveform.

16. The method of claim 15, wherein, The transmission bandwidth determined when the modulation order used in the waveform is a first modulation order is greater than or equal to the transmission bandwidth determined when the modulation order used in the waveform is a second modulation order, the first modulation order being less than the second modulation order.

17. The method according to any one of claims 11-16, characterized in that, The transmission bandwidth is further determined based on a power class of the terminal device.

18. The method of claim 11, wherein, A lowest frequency position or a highest frequency position of the transmission bandwidth is located in a guard band of a channel bandwidth in which the transmission bandwidth is located.

19. The method of claim 11, wherein, The sequence spreading factor is a ratio of a difference between a length of a symbol sequence carried by the transmission bandwidth and a length of a symbol sequence carried by the waveform and the length of the symbol sequence carried by the waveform. Or, The sequence spreading factor is a ratio of a difference between a length of a symbol sequence carried by the transmission bandwidth and a length of a symbol sequence carried by the waveform and the length of the symbol sequence carried by the transmission bandwidth.

20. The method according to any one of claims 13-17, characterized by, Further comprising: Receiving capability information from the terminal device, the capability information comprising one or more of: A maximum transmission bandwidth supported, a highest modulation order supported, a carrier modulation type supported, a window function supported, and a power class.

21. A readable storage medium, characterized by, The readable storage medium comprises a program which, when run on a device, causes the device to perform the method of any one of claims 1-10, or to perform the method of any one of claims 11-20.

22. A communications device, characterized by The communication device comprises at least one processor configured to read and execute program instructions stored in a memory, so as to cause the method of any one of claims 1-10 to be implemented, or to cause the method of any one of claims 11-20 to be performed.

23. The communication apparatus according to claim 22, wherein, Further comprising the memory.

24. A computer program product, characterised in that, The computer program product comprises computer program instructions which, when run on a device, cause the device to perform the method of any one of claims 1-10, or to perform the method of any one of claims 11-20.

25. A communications device, characterized by Comprising a module for performing the method of any one of claims 1-20.

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