Apparatus and method for efficient wireless communication over large bandwidth

Abstract

A transceiver device (130) for wireless communication using carrier aggregation of a plurality of component carriers (CCs) distributed over an available bandwidth within an operating frequency range, where each CC carries a signal waveform. The transceiver device (130) comprises a communication interface (133) for transmitting the plurality of CCs to other transceiver devices (110) based on an adaptive communication configuration (140) according to a distance (170) between the transceiver device (130) and the other transceiver devices (110). The adaptive communication configuration (140) defines a CC bandwidth for the plurality of CCs and a number of the plurality of CCs.

Description

Technical Field

[0001] This invention relates to wireless communication technology. More specifically, this invention relates to apparatus and methods for efficient wireless communication over a wide bandwidth, particularly at high frequencies (e.g., frequencies in the terahertz frequency range). Background Technology

[0002] Wireless communication systems using large bandwidths are often affected by time-frequency synchronization errors. Due to various hardware limitations, traditional transceivers often struggle to communicate over a single large bandwidth. For example, when considering very large bandwidths, sampling time requirements can become stringent, and the performance of analog-to-digital converters (ADCs) and digital-to-analog converters (DACs) can become bottlenecks. Summary of the Invention

[0003] The purpose of this disclosure is to provide devices and methods for more efficient communication over large bandwidths, especially at high frequencies (e.g., frequencies in the terahertz frequency range).

[0004] The foregoing and other objectives are achieved through the subject matter claimed in the independent claims. Other implementations are apparent from the dependent claims, the specification, and the drawings.

[0005] According to a first aspect, a transceiver device, particularly a UE, is provided for wireless communication using carrier aggregation of multiple component carriers (CCs) distributed over an available bandwidth within an operating frequency range, wherein each CC carries a corresponding signal waveform. The transceiver device includes a communication interface for transmitting the multiple CCs to other transceiver devices based on an adaptive communication configuration according to the distance between the transceiver device and other transceiver devices. The adaptive communication configuration defines the CC bandwidth of the multiple CCs and the number of the multiple CCs. Therefore, a device for efficient wireless communication over a large bandwidth is provided. This device is particularly suitable for operation at high frequencies (e.g., frequency-rich terahertz (THz) frequencies, i.e., frequencies in the 100 GHz to 10 THz band). In fact, the THz spectrum provides a large amount of unused bandwidth that can be aggregated by the device according to the first aspect to utilize the entire available bandwidth.

[0006] In another possible implementation of the first aspect, the adaptive communication configuration further defines a center CC frequency for each of the plurality of CCs.

[0007] In another possible implementation of the first aspect, the communication interface is used to transmit the plurality of CCs such that a corresponding guard band is set in the frequency domain between adjacent (i.e., neighboring) CCs among the plurality of CCs.

[0008] In another possible implementation of the first aspect, the adaptive communication configuration defines the bandwidth of multiple guard bands located between adjacent CCs.

[0009] In another possible implementation of the first aspect, the transceiver device further includes processing circuitry for determining the adaptive communication configuration based on an estimate of the distance between the transceiver device and the other transceiver devices.

[0010] In another possible implementation of the first aspect, the signal waveform is a multi-carrier signal waveform. In one implementation, each CC may carry a corresponding orthogonal frequency-division multiplexing (OFDM) signal waveform.

[0011] In another possible implementation of the first aspect, the processing circuitry is further configured to determine the adaptive communication configuration based on the distance between the transceiver device and the other transceiver devices, and based on statistical information about the communication channel between the transceiver device and the other transceiver devices and / or statistical information about the time-frequency synchronization performance of the transceiver devices.

[0012] In another possible implementation of the first aspect, the processing circuit is further configured to implement a path loss model for providing corresponding path loss estimates for multiple frequencies within the operating frequency range and multiple distances between the transceiver and the other transceivers, and the processing circuit is further configured to use the path loss model to determine the adaptive communication configuration.

[0013] In another possible implementation of the first aspect, the processing circuitry is used to determine the adaptive communication configuration by maximizing the communication data rate of a plurality of candidate communication configurations.

[0014] In another possible implementation of the first aspect, the communication interface is used to receive the adaptive communication configuration from the other transceiver device.

[0015] In another possible implementation of the first aspect, the transceiver device is a user equipment (UE), and the other transceiver device is a base station or other UE.

[0016] According to a second aspect, a method is provided for wireless communication using carrier aggregation of multiple component carriers (CCs) distributed over available bandwidth within an operating frequency range, wherein each CC carries a corresponding signal waveform. The method includes: transmitting the multiple CCs to other transceivers based on an adaptive communication configuration according to the distance between the transceiver and other transceivers, wherein the adaptive communication configuration defines the CC bandwidth of the multiple CCs and the number of the multiple CCs.

[0017] The method described according to the second aspect of this disclosure can be performed by the transceiver device described according to the first aspect of this disclosure. Therefore, other features of the method described according to the second aspect of this disclosure are directly implemented by the functions of the transceiver device described according to the first aspect of this disclosure and its various implementations described above and below.

[0018] According to a third aspect, a transceiver device, particularly a base station, is provided for wireless communication using carrier aggregation of multiple component carriers (CCs) distributed over an available bandwidth within an operating frequency range, wherein each CC carries a corresponding signal waveform. The transceiver device includes processing circuitry for determining an adaptive communication configuration based on the distance between the transceiver device and other transceiver devices. The adaptive communication configuration defines the CC bandwidth of the multiple CCs and the number of the multiple CCs. The transceiver device also includes a communication interface for sending the adaptive communication configuration to the other transceiver devices, so that the other transceiver devices send the multiple CCs to the transceiver device based on the adaptive communication configuration.

[0019] In another possible implementation of the third aspect, the adaptive communication configuration further defines a center CC frequency for each of the plurality of CCs.

[0020] In another possible implementation of the third aspect, the adaptive communication configuration defines the bandwidth of multiple guard bands located between adjacent CCs, and uses the multiple CCs to be transmitted to the transceiver device by the other transceiver device based on the adaptive communication configuration.

[0021] In another possible implementation of the third aspect, the processing circuitry is used to determine the adaptive communication configuration based on an estimate of the distance between the transceiver device and the other transceivers devices.

[0022] In another possible implementation of the third aspect, the signal waveform is a multi-carrier signal waveform. In one implementation, each CC can carry a corresponding orthogonal frequency-division multiplexing (OFDM) signal waveform.

[0023] In another possible implementation of the third aspect, the processing circuit is further configured to determine the adaptive communication configuration based on the distance between the transceiver device and the other transceiver devices, and based on statistical information about the communication channel between the transceiver device and the other transceiver devices and / or statistical information about the time-frequency synchronization performance of the other transceiver devices.

[0024] In another possible implementation of the third aspect, the processing circuit is further configured to implement a path loss model, which provides corresponding path loss estimates for multiple frequencies within the operating frequency range and multiple distances between the transceiver and the other transceivers, and the processing circuit is further configured to use the path loss model to determine the adaptive communication configuration.

[0025] In another possible implementation of the third aspect, the processing circuitry is used to determine the adaptive communication configuration by maximizing the communication data rate of a plurality of candidate communication configurations.

[0026] In another possible implementation of the third aspect, the transceiver device is a base station or user equipment (UE), and the other transceiver devices are other UEs.

[0027] According to a fourth aspect, a method is provided for wireless communication using carrier aggregation of multiple component carriers (CCs) distributed over an available bandwidth within an operating frequency range, wherein each CC carries a corresponding signal waveform. The method includes: determining an adaptive communication configuration based on the distance between the transceiver and other transceivers, wherein the adaptive communication configuration defines the CC bandwidth of the multiple CCs and the number of the multiple CCs. The method further includes: transmitting the adaptive communication configuration to the other transceivers so that the other transceivers transmit the multiple CCs to the transceiver based on the adaptive communication configuration.

[0028] The method described according to the fourth aspect of this disclosure can be performed by the transceiver device described according to the third aspect of this disclosure. Therefore, other features of the method described according to the fourth aspect of this disclosure are directly implemented by the functions of the transceiver device described according to the third aspect of this disclosure and its various implementations described above and below.

[0029] According to a fifth aspect, a computer program product is provided, including a computer-readable storage medium for storing program code that, when executed by a computer or processor, causes the computer or processor to perform the method according to a second aspect or the method according to a fourth aspect.

[0030] The following drawings and description illustrate one or more embodiments in detail. Other features, objects, and advantages are clearly shown in the description, drawings, and claims. Attached Figure Description

[0031] The embodiments of this disclosure will be described in detail below with reference to the accompanying drawings, in which:

[0032] Figure 1 A communication system is shown, including a first transceiver device according to one embodiment and a second transceiver device according to one embodiment;

[0033] Figure 2a A schematic diagram of a component carrier (CC) allocation scheme in the THz band implemented by a transceiver device according to an embodiment is shown.

[0034] Figure 2b A graph showing the available bandwidth as a function of the varying distance between a first transceiver device according to one embodiment and a second transceiver device according to one embodiment is shown.

[0035] Figure 3 A signaling diagram illustrating the signaling flow between a first transceiver device according to one embodiment and a second transceiver device according to one embodiment is shown.

[0036] Figure 4a A schematic diagram of a first process of a first algorithm implemented by a first transceiver device and a second process of a second algorithm according to an embodiment is shown;

[0037] Figure 4b The first main embodiment is shown. Figure 4a Exemplary pseudocode for the first algorithm;

[0038] Figure 4c The first main embodiment is shown. Figure 4a Example pseudocode for the second algorithm;

[0039] Figure 4d Exemplary pseudocode of a third algorithm implemented by a first transceiver device according to a second main embodiment is shown;

[0040] Figure 5a The graph shows the error vector magnitude versus the selected bandwidth;

[0041] Figure 5b A graph showing the aggregate data rate (ADR) for different CC bandwidths when the exemplary transceiver distance is 200 meters is displayed.

[0042] Figure 6 A flowchart is shown of an operation method of a transceiver device according to an embodiment for wireless communication using carrier aggregation with multiple component carriers;

[0043] Figure 7 A flowchart is shown of an operation method of a transceiver device according to another embodiment for wireless communication using carrier aggregation of multiple component carriers.

[0044] In the following text, the same reference numerals refer to the same or at least functionally equivalent features. Detailed Implementation

[0045] In the following description, reference is made to the accompanying drawings, which form a part of this disclosure, which illustrate by way of description specific aspects of embodiments of the disclosure or aspects that may be used with embodiments of the disclosure. It should be understood that embodiments of the disclosure can be used in other ways and include structural or logical variations not depicted in the drawings. Therefore, the following detailed description should not be construed in a limiting sense, and the scope of this disclosure is defined by the appended claims.

[0046] For example, it should be understood that the disclosure relating to the described method is also applicable to the corresponding device or system used to perform the method, and vice versa. For example, if one or more specific method steps are described, the corresponding device may include one or more units, such as functional units, to perform the described one or more method steps (e.g., one unit performs one or more steps, or multiple units perform one or more of multiple steps respectively), even if the one or more units are not explicitly described or shown in the drawings. On the other hand, for example, if a specific apparatus is described based on one or more units (e.g., functional units), the corresponding method may include a step to perform the function of one or more units (e.g., one step performs the function of one or more units, or multiple steps perform the function of one or more of multiple units respectively), even if the one or more steps are not explicitly described or shown in the drawings. Furthermore, it should be understood that, unless otherwise expressly stated, features of the various exemplary embodiments and / or aspects described herein can be combined with each other.

[0047] Figure 1A communication system 100 is illustrated, including a first transceiver device 110 according to one embodiment and a second transceiver device 130 according to another embodiment. The second transceiver device 130 may be a user equipment (UE) 130, and the first transceiver device 110 may be a base station 110 or other UE 110. The communication system 100 may be a wireless communication network 100.

[0048] like Figure 1 As shown, the first transceiver device 110 includes processing circuitry 111 and a communication interface 113 for wirelessly communicating with the second transceiver device 130 via at least one communication channel 160. The processing circuitry 111 can be implemented in hardware and / or software and may include digital circuitry, or both analog and digital circuitry. The digital circuitry may include components such as application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), digital signal processors (DSPs), or general-purpose processors. The first transceiver device 110 may also include a memory 115 for storing executable program code, which, when executed by the processing circuitry 111, causes the first transceiver device 110 to perform the functions and methods described herein.

[0049] Similarly, the second transceiver device 130 may include processing circuitry 131 and a communication interface 133 for wirelessly communicating with the first transceiver device 110 via at least one communication channel 160. The processing circuitry 131 may be implemented in hardware and / or software and may include digital circuitry, or both analog and digital circuitry. The digital circuitry may include components such as application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), digital signal processors (DSPs), or general-purpose processors. The second transceiver device 130 may also include a memory 135 for storing executable program code that, when executed by the processing circuitry 131, causes the second transceiver device 130 to perform the functions and methods described herein.

[0050] As detailed below, the first transceiver 110 is used for wireless communication using carrier aggregation of multiple component carriers (CCs) distributed over the available bandwidth within the operating frequency range, wherein each CC carries a corresponding signal waveform. Similarly, the second transceiver 130 is used for wireless communication using carrier aggregation of multiple CCs distributed over the available bandwidth within the operating frequency range.

[0051] The processing circuitry 111 of the first transceiver 110 is used to determine an adaptive communication configuration 140 based on the distance 170 between the first transceiver 110 and the second transceiver 130. The adaptive communication configuration 140 defines the CC bandwidth and the number of CCs among the multiple CCs. The adaptive communication configuration 140 can also define a center CC frequency for each of the multiple CCs.

[0052] The communication interface 113 of the first transceiver device 110 is used to send an adaptive communication configuration 140 to the second transceiver device 130, so that the second transceiver device 130 can send multiple CCs to the first transceiver device 110 based on the adaptive communication configuration 140.

[0053] The communication interface 133 of the second transceiver 130 is used to send multiple CCs to the first transceiver 110 based on the adaptive communication configuration 140 according to the distance 170 between the second transceiver 130 and the first transceiver 110.

[0054] The communication interface 133 of the second transceiver 130 can be used to transmit multiple CCs, such that corresponding guard bands are set in the frequency domain between adjacent (i.e., neighboring) CCs among the multiple CCs. The adaptive communication configuration 140 can also define the bandwidth of the multiple guard bands located between adjacent CCs.

[0055] The first transceiver 110 and the second transceiver 130 are described in detail below using examples of orthogonal frequency division multiplexing (OFDM) signal waveforms. It will be understood that the embodiments disclosed herein are not limited to OFDM signal waveforms and can be applied to other types of waveforms.

[0056] Furthermore, for illustrative purposes, the first transceiver 110 is also referred to as transceiver B 110, and the second transceiver 130 is also referred to as transceiver A 130, both communicating in the THz frequency band. It is understood that the embodiments disclosed herein are not limited to this configuration and may include other configurations.

[0057] As described above and below, the embodiments disclosed herein can address the problem of maximizing the achievable data rate (ADR) of a (wireless) communication system 100 using large bandwidths and affected by time-frequency synchronization errors by utilizing an adaptive orthogonal frequency division multiplexing (OFDM) parameter set (numerology) and carrier aggregation. Specifically, due to various hardware limitations, practical transceivers rarely communicate over a single large bandwidth; therefore, the embodiments disclosed herein may involve dividing the THz spectrum into multiple component carriers (CCs), guard bands, and no-transmission areas, wherein each CC carries an information-bearing signal, the guard band is used to prevent inter-CC interference, and no-transmission areas can be allocated to avoid excessive path loss. Unlike conventional methods, spectrum partitioning can be performed by customizing the bandwidth of the OFDM signal (i.e., the bandwidth of each CC) to account for the synchronization constraints of the receiver (i.e., UE 130), which are crucial when using OFDM.

[0058] As detailed below, the embodiments of transceivers 110 and 130 disclosed herein are used to determine the number of OFDM CCs to be deployed given the available bandwidth, the bandwidth of each OFDM CC, and the carrier frequency of each OFDM CC.

[0059] For example, the embodiments disclosed herein may relate to a wireless communication system 100 operating on a terahertz (THz) frequency system where frequency resources may be abundant (i.e., a communication system 100 operating in the 100 GHz to 10 THz frequency band). In fact, the THz spectrum can provide a large amount of unused bandwidth, which can be aggregated to utilize the entire available bandwidth.

[0060] The embodiments disclosed herein may involve using multiple carrier frequencies (CCs) to cover the available frequency range and achieve a CC setup that maximizes the data rate, namely, adaptive communication configuration 140. For each CC, OFDM can be used to combat multipath. Multicarrier waveforms such as OFDM can be used to combat frequency selectivity.

[0061] Figure 2aA schematic diagram of a CC allocation scheme in a THz band is shown, where the carrier frequency of each CC can be selected to avoid spectrum blocks with excessively high path loss peaks. Furthermore, guard bands can be inserted between adjacent CCs to prevent inter-CC interference. For a fixed CC bandwidth (CCB), the number of CCs can also change when the spacing 170 between the first transceiver 110 and the second transceiver 130 changes due to variations in path loss peaks.

[0062] Figure 2b The results show the determination of the available bandwidth as a function of the varying distance 170 between a first transceiver device 110 according to one embodiment and a second transceiver device 130 according to another embodiment. Figure 2b The diagram illustrates the interdependence between spacing distance and path loss, as well as the monotonically decreasing available bandwidth. The primary reason for this monotonically decreasing bandwidth is the widening of the peak path loss (in frequency range) as distance increases. Therefore, it can be concluded that the number of CCs can vary with a distance of 170.

[0063] As described above, in the illustrative example of the OFDM signal waveform, three questions can be addressed: (i) the number of OFDM CCs to be deployed given a variation distance of 170; (ii) which OFDM CCs to use; and (iii) which carrier frequencies to use for the OFDM CCs, with the goal of maximizing the total data rate while the receiver (i.e., the second transceiver 130) is affected by time-frequency synchronization errors.

[0064] To achieve this goal, the embodiments disclosed herein provide a CC setting (i.e., adaptive communication configuration 140) that maximizes the data rate by combining the following: changing the CCB through an adaptive OFDM parameter set (i.e., adaptive communication configuration 140) and performing CC aggregation.

[0065] BS 110 and UE 130 may be able to adapt their OFDM parameter sets (i.e., adaptive communication configuration 140) and may be able to transmit and receive simultaneously on multiple carriers, respectively. Furthermore, UE 130 may be able to aggregate carriers across multiple frequency bands. In this case, carrier aggregation can be designed to utilize available frequency resources to increase the achievable data rate, the adaptive parameter set (i.e., adaptive communication configuration 140) is implemented by changing the subcarrier spacing while keeping the FFT size fixed, and can be designed to combat time-frequency synchronization errors by changing the CCB.

[0066] Specifically, for a fixed FFT size, a higher CCB (larger subcarrier spacing (SCS)) may mean higher sensitivity to time synchronization error (TSE), while a lower bandwidth (smaller SCS) may mean higher sensitivity to frequency synchronization error (FSE). Therefore, for different UEs 130, each CCB may have different error performance, which may affect communication quality. To ensure mitigation of inter-CC interference, BS 110 can set predefined values... Insert a protection band.

[0067] The embodiments disclosed herein may be based on the exchange of multiple parameters between a second transceiver device 130 (e.g., UE 130) and a first transceiver device (e.g., BS 110), which may be necessary to initiate communication.

[0068] Figure 3 A first transceiver device 110 according to an embodiment is shown (in...) Figure 3 Transceiver device B (e.g., BS110) and a second transceiver device 130 according to an embodiment (in Figure 3 A signaling diagram showing the signaling flow between transceiver devices (e.g., UE 130).

[0069] exist Figure 3 In step 301, the second transceiver 130 may send a performance metric to the first transceiver 110 (e.g., BS 110), which quantifies the capabilities of the second transceiver 130 (e.g., UE 130). In this context, the capabilities may quantify (a) time-frequency synchronization accuracy and / or (b) the additive white Gaussian noise (AWGN) power of the second transceiver 130. This information may be included in performance metric / category block 303. Time-frequency synchronization errors that degrade OFDM waveform performance can be represented by their statistical behavior. Statistical information may include (but is not limited to) the distribution and moments of time / frequency synchronization errors (i.e., TSE / carrier frequency offset (CFO)) or, in the case of (partial) compensation for these errors.

[0070] exist Figure 3In step 301, the second transceiver device 130 (e.g., UE 130) can also share its location so that the first transceiver device 110 (e.g., BS 110) can estimate the spacing distance 170 between the second transceiver device 130 (e.g., UE 130) and the first transceiver device 110 (e.g., BS 110), and can extract channel statistics including channel amplitude statistics, path loss information, and delay spread. In one embodiment, the extracted channel statistics correspond to each CC allocated on a specific frequency with different CCB configurations. Figure 3 As shown, location information can be shared in location block 305.

[0071] Then, the first transceiver 110 (e.g., BS 110) can use this information to calculate the performance of a single CC by calculating the expected error vector magnitude (EVM) metric for each CCB that the second transceiver 130 (e.g., UE 130) can support. The expected CC data rate (CCDR) for each CCB can be estimated based on the expected EVM performance. The number of CCs, the CCBs, and the frequency location of the CCs can be extracted based on the interval distance 170 between the second transceiver 130 (e.g., UE 130) and the first transceiver 110 (e.g., BS 110). Through carrier aggregation at the first transceiver 110 (e.g., BS 110), CC settings (i.e., adaptive communication configuration 140) can be selected to maximize the total data rate (also known as the expected aggregate data rate (ADR)).

[0072] exist Figure 3 In step 307, CC settings, i.e., adaptive communication configuration (in... Figure 3 The middle is called a block )140, sent from the first transceiver device 110 (e.g., BS 110) to the second transceiver device (e.g., UE 130).

[0073] The second transceiver device 130 (e.g., UE 130) can also map performance metrics to device categories, specifically UE categories. Specifically, the performance metrics mapped to UE categories can be time-frequency synchronization errors (TSE and CFO) and second-order statistics of the UE AWGN level. During RRC connection establishment, UE 130 can indicate its category to BS 110 using a Capability Information Message (CIM).

[0074] The calculation of expected EVM, expected CCDR, and expected ADR allows communication system 100 to maximize the data rate based on the instantaneous performance at the UE receiver (i.e., communication interface 133 of UE 130) without exploring all possible combinations, thus preventing signaling overhead between BS 110 and UE 130. Alternatively, an alternative could be to estimate TSE and CFO at UE 130 each time, and whenever these estimates change, send updated estimates from UE 130 to BS 110, using these updated estimates to calculate EVM and CCDR, and ultimately, ADR.

[0075] exist Figure 3 In step 309, after sending the CC settings (i.e., adaptive communication configuration 140) from the first transceiver device 110 (e.g., BS 110) to the second transceiver device 130 (e.g., UE 130), communication is established accordingly.

[0076] exist Figure 3 In steps 311 to 315, once the second transceiver device 130 (e.g., UE 130) changes location and selects a new CC setting (i.e., adaptive communication configuration 140) to maximize the data rate, the process is repeated. Figure 3 Steps 301, 307, and 309. (For example...) Figure 3 As shown, in the repeated step 311, the performance metrics / category block 303 may no longer need to be sent.

[0077] The following describes two main embodiments for determining the number of OFDM CCs, OFDM CCBs, and the carrier frequencies of the OFDM CCs, for a first transceiver device 110 (e.g., BS110) operating in the 100 GHz to 10 THz frequency band. As detailed below, in the first main embodiment, the task is divided into a CC processing procedure and an ADR maximization procedure. Assuming that the channel statistics for each CC are identical, these two procedures can be separated. The second main embodiment addresses the case where each CC has different channel statistics.

[0078] Figure 4a A block diagram is shown illustrating a first process 410 defined by a first algorithm and a second process 420 defined by a second algorithm, implemented by a first transceiver device 110 according to a first main embodiment. Exemplary pseudocode for the first algorithm is shown below. Figure 4b As shown (in) Figure 4b (This is referred to as the CC processing algorithm in Chinese). An example pseudocode for the second algorithm is as follows: Figure 4c As shown (in) Figure 4c This is known as the ADR maximization algorithm in China.

[0079] As described above, the first process 410 and the second process 420 are used to determine the number of OFDM CCs, OFDM CCBs, and the carrier frequencies of the OFDM CCs for a THz communication system (i.e., a system operating in the 100 GHz to 10 THz frequency band).

[0080] like Figure 4a As shown, the entire process can be divided into two parts. The first part, implemented by the first process 410, can process each CC using an adaptive parameter set to counteract the performance degradation caused by the CFO and TSE of each CCB. The CCB can be changed using the adaptive parameter set, and the corresponding CCDR will also change accordingly. Then, in the second part, implemented by the second process 420, the total bandwidth can be calculated, and all combinations of CCBs can be explored, resulting in different numbers of carrier components and different corresponding ADRs after aggregation, where the CC setting that maximizes the ADR can be selected (i.e., adaptive communication configuration 140). As mentioned above, for the first main embodiment, it is assumed that the channel statistics of all CCs are the same. If the bandwidth Compact and continuous, making the bandwidth allocated to this bandwidth The center frequency of the CC is relatively close to the center frequency of the bandwidth. If so, then this assumption can be adopted.

[0081] The following details the first process 410 and the second process 420 implemented by the first transceiver device 110 according to the first main embodiment. The entire process may be based on THz channel characteristics or statistical information 401. As described above regarding... Figure 3 As described in step 301, the entire process can also be based on receiver characteristics or statistics 403, namely the capabilities of the receiver (i.e., UE 130).

[0082] The first process 410 described above (i.e., the selection of CCB and the calculation of CCDR) can be implemented by the first algorithm. For example... Figure 4b As further shown, the first algorithm can take the following as input:

[0083] (i) and , respectively representing the available FFT size The set and available sampling time values A set;

[0084] (ii) Channel statistics 401, including delay spread , and ,in, Nakagami- Shape parameters, These are its extended parameters. Here, each channel tap can be determined according to Nakgami- The distribution is distributed to provide greater flexibility in statistical modeling of each channel tap at the THz frequency;

[0085] (iii) Statistical information 403 of the time-frequency synchronization error of the receiver performance (i.e., the performance of UE 130), including the variance of the time-frequency synchronization error. and and AWGN variance Here, CFO and TSE can be considered as having variances of […]. and A zero-mean Gaussian random variable.

[0086] like Figure 4a As shown in boxes 411 and 413, using this information, the first algorithm can process a single CC and derive a set of performance metrics corresponding to the available OFDM parameter set. Specifically, after ensuring that the selected CP size meets specific OFDM symbol efficiency requirements regarding the ratio of CP length to useful OFDM symbol length, the CCB can be changed while keeping the FFT size fixed. Therefore, changing the subcarrier spacing... At this point, a balance can be observed. More specifically, to combat frequency synchronization error (CFO), a larger [mechanism / mechanism] may be required. With a fixed FFT size, this will result in a larger CCB. Therefore, due to the presence of TSE, increasing the CCB may lead to a larger error. Thus, for a given TSE / CFO pair, there may exist an optimal subcarrier spacing choice.

[0087] To illustrate this balance, Figure 5a The graphs showing error vector magnitude (EVM) versus selected bandwidth are presented for two error settings. Figure 5a In the diagram, the analysis results for the first error setting are shown by curve 501, and the simulation results for the first error setting are shown by curve 503. Furthermore, the analysis results for the second error setting are shown by curve 505, and the simulation results for the second error setting are shown by curve 507.

[0088] like Figure 5a As shown, the first error setting indicates poor time-frequency synchronization, while the second error setting indicates good time-frequency synchronization for CC (a single OFDM waveform). That is, each error setting represents two TSE / CFO error pairs. The analysis and simulation results verify the accuracy of the analytical solution. Figure 4aAs shown in boxes 415 and 417, the analysis and evaluation results of the EVM are expected to be used in the first algorithm to calculate the CCDR. As a function of the adopted CCB, the behavior of the EVM indicates the performance trade-off between choosing a small bandwidth or a large bandwidth for a given time-frequency synchronization error.

[0089] like Figure 4b Furthermore, as shown, in order to adjust the overall OFDM symbol efficiency, from Figure 4b The loop starting at line 2 of the first algorithm can ensure ≤ Simultaneously adjust the FFT size, where, It is the threshold of OFDM symbol efficiency. This is the length of the cyclic prefix in the sample. It can be set. Figure 4b The necessary exit condition in line 6 of the first algorithm is used to ensure that the solution is not abandoned. Figure 4b The conditional locking in line 3 of the first algorithm may lead to reduced efficiency if this occurs. After selecting an appropriate FFT size, the analysis EVM per CCB can be used. ) and Tx power ( The results calculate the CCDR, and then the first algorithm can return a set corresponding to the CCDRs that can be used in the second algorithm. .

[0090] The second process 420 described above (i.e., CC aggregation and ADR maximization) can be implemented by a second algorithm. For example... Figure 4c As further shown, the second algorithm can take the following as input:

[0091] (i) CCDR output obtained from the first algorithm ,

[0092] (ii) The distance (d) between the transmitter and receiver is 170.

[0093] (iii) Guard band bandwidth provided by BS 110 during the processing phase The protected frequency band bandwidth Define the minimum interval between adjacent CCs to avoid interference.

[0094] (iv) FFT size ,

[0095] (v) The carrier center frequency of the entire frequency band ,

[0096] (vi) ,

[0097] (vii) The maximum number of CCs that two devices can support .

[0098] like Figure 4a As shown in box 421, using this information, the second algorithm can first determine the available frequency range (i.e., the total available bandwidth). The available frequency range depends on the spacing between the transmitter (i.e., the first transceiver 110) and the receiver (i.e., the second transceiver 130). 170. Figure 2a The total available bandwidth is further shown. Here, The available bandwidth corresponding to the two path loss peaks.

[0099] like Figure 4a As shown in box 423 and as Figure 4c As further shown in the diagram, next, for each bandwidth setting, as in... Figure 4c As written in line 3, given and The number of CCs can be determined. Figure 4c In the next line, such as Figure 4a As further shown in box 425, given the available bandwidth and It can calculate the carrier frequency of each CC and insert that carrier frequency into the set. In China. Specifically, in Figure 4c In line 5, the ADR for each bandwidth setting on each allocated carrier frequency can be calculated and stored. In the middle, after completion, as follows Figure 4a As shown in box 427, It can capture CCB and sets In this case, ADR is maximized. For example, suppose... GHz, , , CCB 4.8 GHz. The set of carrier frequencies is then... ={332.4, 342, 351.6} Hz. In Figure 4c In line 8 of the second algorithm, the variable parameters corresponding to the maximum achievable ADR are extracted, and then... Figure 4c In line 9, the set It can return the number of CCs (i.e. CC corresponds to CCB (i.e.) The set of carrier frequencies of CC (i.e.) ), calculated CP length And (common) FFT size N, to establish CC settings (i.e., adaptive communication configuration 140) between UE 130 and BS110 and initiate communication.

[0100] As described above, the main difference between the second main embodiment and the first main embodiment is that, for those derived from... Figure 4d The ADR maximization scheme defined by the third algorithm shown takes into account different channel statistics for each CC. According to one embodiment, the third algorithm can be implemented by the first transceiver device 110 to determine the number of OFDM CCs, OFDM CCs, and the carrier frequency of the OFDM CCs.

[0101] Figure 4d The third algorithm shown takes the following as input:

[0102] · and , respectively representing the available FFT size The set and available sampling time values The set,

[0103] Channel statistics, including delay spread , and These channel statistics now all depend on the CC's location in the available spectrum.

[0104] • Statistical information on receiver performance, including the variance of time-frequency synchronization error. and ,

[0105] ·AWGN variance ,

[0106] • Spacing between transmitter and receiver ,

[0107] • Protected bandwidth The protected frequency band bandwidth Define the interval between adjacent CCs to avoid interference.

[0108] • Carrier center frequency of the entire frequency band The CC program is planned to be distributed in this frequency band.

[0109] • Maximum number of CCs supported .

[0110] Based on these inputs, Figure 4d The third algorithm shown first calculates the available bandwidth. As an initial step, the CCBs are distributed to understand the distance-dependent molecular absorption loss peaks. Then, for each CCB, according to... Figure 4dThe calculation performed in line 3 of the third algorithm shown is used to calculate the number of CCs. Figure 4d In line 5 of the third algorithm shown, the center frequency of each CC is determined. Subsequently, according to Extract the channel statistics required to calculate the EVM, and based on each The CP length is calculated with explicit delay spread. To adjust the overall OFDM symbol efficiency, from... Figure 4d The third algorithm shown, starting at line 10, loops to adjust the FFT size for each CC. ), while ensuring the CP length at each CC ( ) and FFT size ( The ratio between them is less than ,in, This is the threshold for OFDM symbol efficiency. (Setting) Figure 4d The necessary exit condition in line 13 of the third algorithm shown is to ensure that the scheme is not... Figure 4d The third algorithm shown in line 11 has a conditional blocking mechanism; note that if this occurs, efficiency will decrease. After choosing an appropriate FFT size, the CCDR for each CC is computed using the expected EVM for each CCB, and then the set corresponding to the CCDR for each CC is returned. Then, through carrier aggregation, the ADR for each CCB setting is calculated using CCDR, such as... Figure 4d The third algorithm is shown in line 18. In Figure 4d In line 20 of the third algorithm shown, the maximum ADR is found, and the set of CCBs and the FFT sizes of each CCB is specified. A set of CP lengths including the CP length of each CC. CC quantity and its location Optimal sampling time corresponding to the maximum ADR Each of these quantities is related to Figure 3 The set shown is used to establish a communication session. Related.

[0111] To demonstrate the effectiveness of the proposed solution, Figure 5b The results shown indicate that a different ADR is achieved for each CCB, where the CCB to be selected is the one corresponding to 2.4 GHz, as this CCB can generate a maximum achievable ADR of approximately 172 Gbps. For the 0.6 GHz CCB, the performance limitation is attributed to the limitation on the maximum number of aggregable CCs, which is set to 16 in this exemplary embodiment. It should be noted that to generate this set of results, it is assumed that all CCs observe the same channel statistics.

[0112] Considering the following practical limitations, the embodiments disclosed herein can efficiently utilize the wireless resources in a wireless communication system 100 with a large available bandwidth: (i) due to frequency selective path loss, the available bandwidth depends on the spacing distance 170 between the transmitter (i.e., the first transceiver device 110) and the receiver (i.e., the second transceiver device 130); (ii) the performance of the receiver depends on the statistics of the time-frequency synchronization error.

[0113] Advantageously, the embodiments disclosed herein can maximize data rates while taking into account the aforementioned limitations. Specifically, to achieve this, two techniques can be combined: (i) using an adaptive OFDM parameter set to vary the bandwidth of a single CC, and (ii) using component carrier aggregation to utilize a large amount of available bandwidth.

[0114] Advantageously, the embodiments disclosed herein can divide the available spectrum into subbands, allowing the CC to occupy the bandwidth (CCB) of each subband, and then aggregate all carriers to maximize the data rate, rather than deploying a single OFDM waveform that would tighten synchronization constraints, for example, in high-bandwidth (large FFT size) scenarios. Furthermore, by using an adaptive OFDM parameter set, each CCB can be modified to counteract the inherent time-frequency synchronization error at the receiver (i.e., the second transceiver 130), which is captured by statistics reported by the UE 130 to the BS 110.

[0115] Furthermore, the embodiments disclosed herein can deploy OFDM to counteract the frequency selectivity imposed by the channel at each CC. In conventional approaches, the coherent bandwidth of the channel may be the sole metric for determining the CCB. In the embodiments disclosed herein, the CCB can no longer be limited by the coherent bandwidth, and by using multi-carrier waveforms (e.g., OFDM), the frequency selectivity of each CC can be counteracted, and a higher CCB can be achieved. Since OFDM can be sensitive to synchronization errors, the embodiments disclosed herein can utilize an adaptive parameter set as additional degrees of freedom to counteract the detrimental effects of synchronization errors and modify the CCB. Thus, the problem of finding a CC setting (i.e., adaptive communication configuration 140) that includes the number and bandwidth of CCs that maximize ADR given synchronization constraints and different spacing distances between communication nodes is solved.

[0116] Furthermore, by utilizing adaptive OFDM parameter sets and carrier aggregation, the embodiments disclosed herein can utilize all available bandwidth by allocating multiple CCs at different frequencies. In other words, spectrum allocation can be adaptively performed based on the spacing between the transmitter (i.e., the first transceiver 110) and the receiver (i.e., the second transceiver 130). Therefore, using multiple CCs can utilize the entire available spectrum and can improve the overall data rate.

[0117] As described above, the embodiments disclosed herein are not limited to OFDM signal waveforms, but can be applied to other types of waveforms.

[0118] Figure 6 A flowchart of a method 600 according to one embodiment is shown. Method 600 is used for wireless communication using carrier aggregation of multiple component carriers (CCs) distributed over an available bandwidth in an operating frequency range, wherein each CC carries a corresponding signal waveform.

[0119] Method 600 includes step 601: sending multiple CCs to the first transceiver 110 based on an adaptive communication configuration 140 according to a distance 170 between the second transceiver 130 and the first transceiver 110, wherein the adaptive communication configuration 140 defines the CC bandwidth and the number of multiple CCs.

[0120] Since method 600 can be implemented by the second transceiver device 130, other features of method 600 are implemented directly through the functionality of the second transceiver device 130 and its various embodiments described above and below.

[0121] Figure 7 A flowchart of a method 700 according to one embodiment is shown. Method 700 is used for wireless communication using carrier aggregation of multiple component carriers (CCs) distributed over an available bandwidth in an operating frequency range, wherein each CC carries a corresponding signal waveform.

[0122] Method 700 includes step 701: determining an adaptive communication configuration 140 based on the distance 170 between the first transceiver device 110 and the second transceiver device 130, wherein the adaptive communication configuration 140 defines the CC bandwidth of a plurality of CCs and the number of the plurality of CCs.

[0123] Method 700 further includes step 703: sending an adaptive communication configuration 140 to the second transceiver device 130 so that the second transceiver device 130 sends multiple CCs to the first transceiver device 110 based on the adaptive communication configuration 140.

[0124] Since method 700 can be implemented by the first transceiver device 110, other features of method 700 are directly implemented through the functions of the first transceiver device 110 and its various embodiments described above and below.

[0125] Those skilled in the art will understand that “blocks” (“units”) in the various drawings (methods and apparatuses) represent or describe the functionality of embodiments of this disclosure (and are not necessarily independent “units” in hardware or software), thereby equally describing the functionality or features (unit = step) of apparatus embodiments and method embodiments.

[0126] In the several embodiments provided in this application, it should be understood that the disclosed systems, apparatuses, and methods can be implemented in other ways. For example, the embodiments described for apparatus are merely exemplary. For example, the unit division is only a logical functional division, and other division methods may be used in actual implementation. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not performed. Furthermore, the mutual coupling or direct coupling or communication connection shown or described can be implemented through some interfaces. Indirect coupling or communication connection between apparatuses or units can be implemented electronically, mechanically, or otherwise.

[0127] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of the embodiment solution according to actual needs.

[0128] Furthermore, the functional units in the embodiments of the present invention can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit.

Claims

1. A transceiver (130) for wireless communication using carrier aggregation of multiple component carriers CC distributed over an available bandwidth in an operating frequency range, wherein, Each CC carries a signal waveform, and the transceiver (130) includes: A communication interface (133) is used to send the plurality of CCs to the other transceiver devices (110) based on an adaptive communication configuration (140) according to the distance (170) between the transceiver device (130) and the other transceiver devices (110), wherein the adaptive communication configuration (140) defines the CC bandwidth of the plurality of CCs and the number of the plurality of CCs.

2. The transceiver device (130) according to claim 1, wherein, The adaptive communication configuration (140) also defines a center CC frequency for each of the plurality of CCs.

3. The transceiver device (130) according to claim 1, wherein, The communication interface (133) is used to transmit the plurality of CCs, thereby setting a corresponding guard band between adjacent CCs of the plurality of CCs.

4. The transceiver device (130) according to claim 3, wherein, The adaptive communication configuration (140) defines the bandwidth of multiple guard bands located between adjacent CCs.

5. The transceiver (130) according to any one of the preceding claims, wherein, The transceiver (130) further includes a processing circuit (131) for determining the adaptive communication configuration (140) based on an estimate of the distance (170) between the transceiver (130) and the other transceivers (110).

6. The transceiver device (130) according to claim 5, wherein, The signal waveform is a multi-carrier signal waveform.

7. The transceiver (130) according to claim 5 or 6, wherein, The processing circuit (131) is also used to determine the adaptive communication configuration (140) based on the distance (170) between the transceiver device (130) and the other transceiver device (110) and based on information about the communication channel (160) between the transceiver device (130) and the other transceiver device (110) and / or information about the time-frequency synchronization performance of the transceiver device (130).

8. The transceiver (130) according to claim 5, 6 or 7, wherein, The processing circuit (131) is also used to implement a path loss model, which provides path loss estimates for multiple frequencies within the operating frequency range and multiple distances (170) between the transceiver (130) and the other transceiver (110), and the processing circuit (131) is also used to determine the adaptive communication configuration (140) using the path loss model.

9. The transceiver (130) according to any one of claims 5 to 8, wherein, The processing circuit (131) is used to determine the adaptive communication configuration (140) by maximizing the communication data rate of multiple candidate communication configurations.

10. The transceiver (130) according to any one of the preceding claims, wherein, The communication interface (133) is used to receive the adaptive communication configuration (140) from the other transceiver device (110).

11. The transceiver (130) according to any one of the preceding claims, wherein, The transceiver device (130) is a user equipment (UE), and the other transceiver devices (110) are base stations or other UEs.

12. A method (600), wherein, The method (600) is used for wireless communication using carrier aggregation of multiple component carriers (CCs) distributed over an available bandwidth within an operating frequency range, wherein each CC carries a signal waveform, and the method (600) includes: Based on the distance (170) between the transceiver device (130) and other transceiver devices (110), the plurality of CCs are sent (601) to the other transceiver devices (110) according to an adaptive communication configuration (140), wherein the adaptive communication configuration (140) defines the CC bandwidth of the plurality of CCs and the number of the plurality of CCs.

13. A transceiver device (110), wherein, The transceiver (110) is used for wireless communication using carrier aggregation of multiple component carriers (CCs) distributed over an available bandwidth within an operating frequency range, wherein each CC carries a signal waveform, and the transceiver (110) includes: Processing circuit (111) is configured to determine an adaptive communication configuration (140) based on the distance (170) between the transceiver device (110) and other transceiver devices (130), wherein the adaptive communication configuration (140) defines the CC bandwidth of the plurality of CCs and the number of the plurality of CCs; The communication interface (113) is used to send the adaptive communication configuration (140) to the other transceiver devices (130).

14. The transceiver (110) according to claim 13, wherein, The adaptive communication configuration (140) also defines a center CC frequency for each of the plurality of CCs.

15. The transceiver (110) according to claim 13 or 14, wherein, The adaptive communication configuration (140) defines the bandwidth of multiple guard bands located between adjacent CCs, and will be used by the other transceiver (130) to send the multiple CCs to the transceiver (110) based on the adaptive communication configuration (140).

16. The transceiver (110) according to any one of claims 13 to 15, wherein, The processing circuit (111) is used to determine the adaptive communication configuration (140) based on an estimate of the distance (170) between the transceiver device (110) and the other transceiver devices (130).

17. The transceiver (110) according to claim 16, wherein, The signal waveform is a multi-carrier signal waveform.

18. The transceiver (110) according to claim 16 or 17, wherein, The processing circuit (111) is also used to determine the adaptive communication configuration (140) based on the distance (170) between the transceiver device (110) and the other transceiver device (130) and based on information about the communication channel (160) between the transceiver device (110) and the other transceiver device (130) and / or information about the time-frequency synchronization performance of the other transceiver device (130).

19. The transceiver (110) according to claim 16, 17 or 18, wherein, The processing circuit (111) is also used to implement a path loss model, which provides path loss estimates for multiple frequencies within the operating frequency range and multiple distances (170) between the transceiver (110) and the other transceiver (130), and the processing circuit (111) is also used to determine the adaptive communication configuration (140) using the path loss model.

20. The transceiver (110) according to any one of claims 16 to 19, wherein, The processing circuit (111) is used to determine the adaptive communication configuration (140) by maximizing the communication data rate of multiple candidate communication configurations.

21. The transceiver (110) according to any one of the preceding claims, wherein, The transceiver device (110) is a base station or user equipment (UE), and the other transceiver devices (130) are other UEs.

22. A method (700), wherein, The method (700) is used for wireless communication using carrier aggregation of multiple component carriers (CCs) distributed over an available bandwidth within an operating frequency range, wherein each CC carries a signal waveform, and the method (700) includes: An adaptive communication configuration (140) is determined (701) based on the distance (170) between the transceiver device (110) and other transceiver devices (130), wherein the adaptive communication configuration (140) defines the CC bandwidth of the plurality of CCs and the number of the plurality of CCs; Send (703) the adaptive communication configuration (140) to the other transceiver devices (130).

23. A computer program product comprising a computer-readable storage medium for storing program code, which, when executed by a computer or processor, causes the computer or processor to perform the method (600, 700) according to claim 12 or 22.

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