Duplex mode repair of self-interference

Abstract

Systems and methods are described in which one or more wireless communication stations implement duplex mode repair to facilitate signal communication when problems with self-interference are identified. The duplex mode repair can be implemented for various communication scenarios, such as for random access phase communications, for communications with different priorities, etc. The wireless communication station can implement one or more changes with respect to full-duplex operation of the wireless communication station based on determining that problems related to self-interference may be or are being experienced, such as providing the wireless communication station operating in an intra-band full-duplex mode to increase interference cancellation and / or fall back to a sub-band full-duplex mode or a half-duplex mode, providing the wireless communication station operating in a sub-band full-duplex mode to increase interference cancellation and / or fall back to a half-duplex mode.

Description

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to Greek Patent Application No. 20200100014, filed on January 15, 2020, entitled “DUPLEX-MODE REMEDIATION FOR SELFINTERFERENCE,” the disclosure of which is expressly incorporated herein by reference in its entirety as if fully set forth below and for all applicable purposes. Technical Field

[0003] Aspects of the present disclosure relate generally to wireless communication systems, and more particularly to duplex mode repair with respect to self-interference implementation. Background Art

[0004] Wireless communication networks are widely deployed to provide various communication services, such as voice, video, packet data, messaging, broadcasting, etc. These wireless networks can be multiple access networks that can support multiple users by sharing available network resources. Such a network (usually a multiple access) network supports the communication of multiple users by sharing available network resources. An example of such a network is the Universal Terrestrial Radio Access Network (UTRAN). UTRAN is a radio access network (RAN) defined as a part of the Universal Mobile Telecommunications System (UMTS), which is a third generation (3G) mobile phone technology supported by the Third Generation Partnership Project (3GPP). Examples of multiple access network formats include code division multiple access (CDMA) networks, time division multiple access (TDMA) networks, frequency division multiple access (FDMA) networks, orthogonal FDMA (OFDMA) networks, and single carrier FDMA (SC-FDMA) networks.

[0005] A wireless communication network may include multiple base stations or Node Bs that may support communications for multiple user equipments (UEs). A UE may communicate with a base station via a downlink and an uplink. A downlink (or forward link) refers to a communication link from a base station to a UE, while an uplink (or reverse link) refers to a communication link from a UE to a base station.

[0006] The base station may send data and control information to the UE on the downlink and / or may receive data and control information from the UE on the uplink. On the downlink, the transmission from the base station may encounter interference caused by transmissions from neighboring base stations or from other wireless radio frequency (RF) transmitters. On the uplink, the transmission from the UE may encounter interference from uplink transmissions of other UEs communicating with neighboring base stations or from other wireless RF transmitters. This interference may degrade performance on both the downlink and uplink.

[0007] As the demand for mobile broadband access continues to increase, the potential for interference and congested networks is also increasing. For example, as more and more wireless communication stations (base stations, UEs, etc.) are deployed and used for wireless communication, the available wireless spectrum becomes more congested. Communication techniques such as full-duplex wireless communication are often implemented to optimize the use of available wireless spectrum. However, such communication techniques are not without disadvantages. For example, a wireless communication station implementing full-duplex communication may experience self-interference. Such self-interference may cause transmission and / or reception failures during wireless communication. Summary of the invention

[0008] Some aspects of the present disclosure are summarized below to provide a basic understanding of the technology discussed. This summary is not an extensive overview of all contemplated features of the present disclosure, and is neither intended to identify key or important elements of all aspects of the present disclosure, nor is it intended to delineate the scope of any or all aspects of the present disclosure. Its sole purpose is to present some concepts of one or more aspects of the present disclosure in summary form as a prelude to a more detailed description presented later.

[0009] In one aspect of the present disclosure, a wireless communication method is provided. The method may include analyzing one or more aspects of signal communication by a wireless communication station operating in full-duplex mode with respect to self-interference. The method may also include, when the analysis determines that an aspect of the one or more aspects of signal communication has a problem with self-interference, implementing duplex mode repair by the wireless communication station by falling back from full-duplex mode to facilitate signal communication.

[0010] In another aspect of the present disclosure, a device configured for wireless communication is provided. The device may include a component for analyzing one or more aspects of signal communication by a wireless communication station operating in full-duplex mode with respect to self-interference. The device may also include a component for implementing duplex mode repair by the wireless communication station to facilitate signal communication by falling back from full-duplex mode when the analysis determines that one or more aspects of signal communication have problems with self-interference.

[0011] In another aspect of the present disclosure, a non-transitory computer-readable medium having a program code for wireless communication recorded thereon is provided. The program code may include code for analyzing one or more aspects of signal communication by a wireless communication station operating in full-duplex mode with respect to self-interference. The program code may also include code for implementing duplex mode repair by the wireless communication station to facilitate signal communication by falling back from full-duplex mode when the analysis determines that one or more aspects of signal communication have problems with self-interference.

[0012] In another aspect of the present disclosure, a device configured for wireless communication is provided. According to various aspects of the present disclosure, the device includes at least one processor, and a memory coupled to the processor. The processor can be configured to analyze one or more aspects of signal communication by a wireless communication station operating in full-duplex mode with respect to self-interference. The processor can also be configured to implement duplex mode repair by the wireless communication station by falling back from full-duplex mode to facilitate signal communication when the analysis determines that one or more aspects of signal communication have problems with self-interference.

[0013] According to aspects of the present disclosure, the aforementioned systems, methods, and apparatuses may be implemented in conjunction with one or more additional features, such as the following features, either individually or in combination. For example, the aforementioned systems, methods, and apparatuses may include a fallback from full-duplex mode, including a full-duplex fallback selected from the following: fallback from in-band full-duplex mode to sub-band full-duplex mode, fallback from in-band full-duplex mode to half-duplex mode, and fallback from sub-band full-duplex mode to half-duplex mode. The aforementioned systems, methods, and apparatuses may include: sending a first message of a random access procedure, and monitoring a second message of a random access procedure in response to the first message, wherein the aspect of signal communication determined to have a problem with self-interference may include identifying a failure to receive the second message. The aforementioned systems, methods, and apparatuses may include sending a first message of a random access procedure, and monitoring a second message of a random access procedure, wherein when an analysis determines that the second message has not been received after a threshold number of times of sending the first message, the sub-band full-duplex mode may be changed by implementing duplex mode repair by falling back from the full-duplex mode. The above-mentioned systems, methods and apparatus may include changing the sub-band full-duplex mode by implementing a duplex mode repair including falling back from the sub-band full-duplex mode to the half-duplex mode. The above-mentioned systems, methods and apparatus may include monitoring a first message of a random access process, wherein the aspect of the signal communication that is determined to have a problem with self-interference may include identifying a failure to receive the first message. The above-mentioned systems, methods and apparatus may include implementing a duplex mode repair by falling back from the full-duplex mode, including falling back from the full-duplex mode to the half-duplex mode. The above-mentioned systems, methods and apparatus may include: analyzing one or more aspects of the signal communication to determine that the signal communication includes the transmission or reception of the first communication and the reception or transmission of the second communication, wherein the first communication may be determined to have a higher priority than the priority of the second communication, and wherein when the analysis determines that there is a problem with self-interference, the full-duplex mode may be changed to facilitate the communication of the first communication by falling back from the full-duplex mode. The above-mentioned systems, methods and apparatus may include a full-duplex mode, the full-duplex mode including an intra-band full-duplex mode, and wherein changing the full-duplex mode may include falling back from the intra-band full-duplex mode to a sub-band full-duplex mode. The above-mentioned systems, methods and apparatus may include a full-duplex mode, the full-duplex mode including an intra-band full-duplex mode, and wherein changing the full-duplex mode may include falling back from the intra-band full-duplex mode to a half-duplex mode. The above-mentioned systems, methods and apparatus may include a full-duplex mode, the full-duplex mode including a sub-band full-duplex mode, and wherein changing the full-duplex mode may include falling back from the sub-band full-duplex mode to a half-duplex mode.

[0014] The foregoing has outlined rather broadly the features and technical advantages of examples according to the present disclosure so that the following detailed description may be better understood. Additional features and advantages will be described below. The disclosed concepts and specific examples may be easily used as a basis for modifying or designing other structures for achieving the same purpose of the present disclosure. Such equivalent constructions do not depart from the scope of the appended claims. The features of the concepts disclosed herein, their organization and methods of operation, and related advantages may be better understood through the following description when considered in conjunction with the accompanying drawings. Each of the accompanying drawings is provided for the purpose of illustration and description and not as a definition of limitations to the claims. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] A further understanding of the nature and advantages of the present disclosure may be achieved by reference to the following drawings. In the drawings, similar components or features may have the same reference numeral. In addition, various components of the same type may be distinguished by following the reference numeral with a dash and a second reference numeral to distinguish between similar components. If only the first reference numeral is used in the specification, the description applies to any similar component having the same first reference numeral, regardless of the second reference numeral.

[0016] Figure 1 is a block diagram showing details of a wireless communication system.

[0017] Figure 2 is a block diagram showing a design of a base station and a UE configured according to one aspect of the present disclosure.

[0018] FIG. 3A to FIG. 3D Various configurations of full-duplex mode that may be used by a wireless communication station in accordance with aspects of the present disclosure are shown.

[0019] FIG. 4A to FIG. 4C An example of self-interference introduced by full-duplex wireless communications is shown in accordance with aspects of the present disclosure.

[0020] Figure 5 is a flow chart illustrating an example of operations for implementing duplex mode repair by a wireless communication station in accordance with aspects of the present disclosure.

[0021] Figures 6 to 8 is a flow chart illustrating an example of operations for implementing duplex mode repair for various communication scenarios by a wireless communication station in accordance with aspects of the present disclosure.

[0022] Fig. 9 is a block diagram conceptually illustrating a design of a UE configured for duplex-mode repair operations in accordance with some aspects of the present disclosure.

[0023] Fig.10 is a block diagram conceptually illustrating a design of a base station configured for duplex-mode repair operations in accordance with some aspects of the present disclosure. DETAILED DESCRIPTION

[0024] The specific embodiments described below in conjunction with the accompanying drawings are intended as descriptions of various configurations and are not intended to limit the scope of the present disclosure. Instead, the specific embodiments include specific details for providing a thorough understanding of the subject matter of the present invention. It will be apparent to those skilled in the art that these specific details are not required in every case, and in some cases, well-known structures and components are shown in block diagram form for clarity.

[0025] The present disclosure as a whole relates to providing or participating in authorized shared access between two or more wireless communication systems (also referred to as wireless communication networks). A wireless communication station implementing a full-duplex mode for wireless communication transmits and receives simultaneously. Such full-duplex wireless communication may result in self-interference situations. Self-interference associated with full-duplex wireless communication may result in transmission and / or reception failures during wireless communication.

[0026] In order to facilitate signal communication, when problems with self-interference are identified, a wireless communication station operating in full-duplex mode can implement duplex mode repair according to the concepts of the present disclosure. For example, duplex mode repair can be implemented for various communication scenarios, such as for random access phase communications, for communications with different priorities, etc. The wireless communication station can implement one or more changes with respect to the full-duplex operation of the wireless communication station based on determining that problems with self-interference may be experienced or are being experienced. For example, wireless communication can initiate changes to provide a wireless communication station operating in an in-band full-duplex mode to increase interference cancellation and / or fall back to a sub-band full-duplex mode or a half-duplex mode, to provide a wireless communication station operating in a sub-band full-duplex mode to increase interference cancellation and / or fall back to a half-duplex mode.

[0027] In various embodiments, these techniques and devices can be used in wireless communication networks, such as code division multiple access (CDMA) networks, time division multiple access (TDMA) networks, frequency division multiple access (FDMA) networks, orthogonal FDMA (OFDMA) networks, single carrier FDMA (SC-FDMA) networks, LTE networks, GSM networks, 5th generation (5G) or new radio (NR) networks, and other communication networks. As described herein, the terms "network" and "system" can be used interchangeably.

[0028] OFDMA networks can implement radio technologies such as Evolved UTRA (E-UTRA), IEEE 802.11, IEEE 802.16, IEEE802.20, Flash OFDM, etc. UTRA, E-UTRA, and Global System for Mobile Communications (GSM) are part of the Universal Mobile Telecommunications System (UMTS). In particular, Long Term Evolution (LTE) is a version of UMTS that uses E-UTRA. UTRA, E-UTRA, GSM, UMTS, and LTE are described in documents provided by an organization named "3rd Generation Partnership Project" (3GPP), while cdma2000 is described in documents provided by an organization named "3rd Generation Partnership Project 2" (3GPP2). These different radio technologies and standards are either known or under development. For example, the 3rd Generation Partnership Project (3GPP) is a collaboration between a group of telecommunications associations to define globally applicable third generation (3G) mobile phone specifications. 3GPP Long Term Evolution (LTE) is a 3GPP project aimed at improving the Universal Mobile Telecommunications System (UMTS) mobile phone standard. 3GPP may define specifications for next generation mobile networks, mobile systems, and mobile devices. The present disclosure relates to wireless technologies evolving from LTE, 4G, 5G, NR, etc., and sharing wireless spectrum access between networks using a set of new and different radio access technologies or radio air interfaces.

[0029] In particular, 5G networks take into account different deployments, different spectrums, and different services and devices that can be implemented using a unified air interface based on OFDM. To achieve these goals, in addition to developing new radio technologies for 5G NR networks, further enhancements to LTE and LTE-A are also considered. 5GNR will be able to scale to provide coverage for: (1) networks with ultra-high density (e.g., about 1 million nodes / km 2 ), ultra-low complexity (e.g., about 10s of bits / second), ultra-low energy consumption (e.g., about 10+ years of battery life), and with deep coverage to reach challenging locations; (2) mission-critical control including strong security to protect sensitive personal, financial, or confidential information, ultra-high reliability (e.g., ~99.9999% reliability), ultra-low latency (e.g., about 1ms), and users with widespread mobility or lack of mobility; and (3) enhanced mobile broadband, including extremely high capacity (e.g., about 10Tbps / km 2 ), extremely high data rates (e.g., multi-Gbps rates, 100+Mbps user experience rates), and deep perception with advanced discovery and optimization capabilities.

[0030] 5G NR can be implemented using an optimized OFDM-based waveform with scalable numerology and transmission time interval (TTI); a general, flexible framework that can effectively multiplex services and functions through dynamic, low-latency time division duplex (TDD) / frequency division duplex (FDD) design; and advanced wireless technologies such as massive multiple-input multiple-output (MIMO), robust millimeter wave (mmWave) transmission, advanced channel coding, and device-centric mobility. The scalability of parameters in 5G NR and the extension of subcarrier spacing can effectively solve the operation problems of different services across different spectrums and different deployments. For example, in various outdoor and macro coverage deployments of less than 3GHz FDD / TDD implementations, subcarrier spacing may appear at 15kHz, such as over 1, 5, 10, 20MHz bandwidths. For other various outdoor and small cell coverage deployments of TDD greater than 3GHz, 30kHz subcarrier spacing may appear on 80 / 100MHz bandwidths. For various other indoor broadband implementations, using TDD in the unlicensed portion of the 5 GHz band, subcarrier spacing may occur at 60 kHz over a 160 MHz bandwidth. Finally, for various deployments using TDD at 28 GHz using the mmWave component, subcarrier spacing may occur at 120 kHz over a 500 MHz bandwidth.

[0031] The scalable parameters of 5G NR facilitate scalable TTI to meet various latency and quality of service (QoS) requirements. For example, shorter TTI can be used for low latency and high reliability, while longer TTI can be used for higher spectral efficiency. Long TTI and short TTI are efficiently multiplexed to allow transmission to start on symbol boundaries. 5G NR also considers a self-contained integrated subframe design with uplink / downlink scheduling information, data, and acknowledgment in the same subframe. The self-contained integrated subframe supports communications in unlicensed or contention-based shared spectrum, and the adaptive uplink / downlink can be flexibly configured on a per-cell basis to dynamically switch between uplink and downlink to meet current traffic needs.

[0032] Various other aspects and features of the present disclosure are further described below. Obviously, the teachings of this article can be embodied in various forms, and any specific structure, function, or both disclosed herein are only representative and non-restrictive. Based on the teachings of this article, it should be understood by those of ordinary skill in the art that an aspect disclosed herein can be implemented independently of any other aspect, and two or more of these aspects can be combined in various ways. For example, any number of aspects set forth herein can be used to implement a device or practice a method. In addition, in addition to or different from one or more aspects set forth herein, other structures, functions, or structures and functions can be used to implement such a device or such a method can be practiced. For example, a method can be implemented as a part of a system, device, device, and / or implemented as instructions stored on a computer-readable medium for execution on a processor or computer. In addition, an aspect may include at least one element of a claim.

[0033] Figure 1 1 is a block diagram illustrating a 5G network 100 including various base stations and UEs configured according to various aspects of the present disclosure. The 5G network 100 includes multiple base stations 105 and other network entities. A base station may be a station that communicates with a UE and may also be referred to as an evolved Node B (eNB), a next generation eNB (gNB), an access point, etc. Each base station 105 may provide communication coverage for a specific geographic area. In 3GPP, the term "cell" may refer to that specific geographic coverage area of ​​a base station and / or a base station subsystem serving that coverage area, depending on the context in which the term is used.

[0034] A base station may provide communication coverage for a macro cell or a small cell (such as a pico cell or a femto cell) and / or other types of cells. A macro cell typically covers a relatively large geographic area (e.g., several kilometers in radius) and may allow unrestricted access to UEs with a service subscription with a network provider. Small cells such as pico cells will typically cover a relatively small geographic area and may allow unrestricted access to UEs with a service subscription with a network provider. Small cells such as femto cells will also typically cover a relatively small geographic area (e.g., a home) and, in addition to unrestricted access, may also provide restricted access by UEs associated with the femto cell (e.g., UEs in a closed subscriber group (CSG), UEs of users in a home, etc.). A base station for a macro cell may be referred to as a macro base station. A base station for a small cell may be referred to as a small cell base station, a pico base station, a femto base station, or a home base station. In Figure 1In the example shown, base stations 105d and 105e can be conventional macro base stations, while base stations 105a-105c can be macro base stations that enable one of 3-dimensional (3D), full-dimensional (FD), or massive MIMO. Base stations 105a-105c use their higher-dimensional MIMO capabilities to increase coverage and capacity using 3D beamforming that simultaneously performs elevation and azimuth beamforming. Base station 105f is a small cell base station that can be a home node or a portable access point. The base station can support one or more (e.g., two, three, four, etc.) cells.

[0035] The 5G network 100 may support synchronous or asynchronous operation. For synchronous operation, the base stations may have similar frame timing, and transmissions from different base stations may be approximately aligned in time. For asynchronous operation, the base stations may have different frame timing, and transmissions from different base stations may not be aligned in time.

[0036] UE 115 is scattered throughout the wireless network, and each UE can be fixed or mobile. UE can also be referred to as a terminal, mobile station, subscriber unit, station, etc. UE can be a cellular phone, a personal digital assistant (PDA), a wireless modem, a wireless communication device, a handheld device, a tablet computer, a laptop computer, a cordless phone, a wireless local loop (WLL) station, etc. In one aspect, the UE can be a device including a universal integrated circuit card (UICC). On the other hand, the UE can be a device that does not include a UICC. In some aspects, a UE that does not include a UICC can also be referred to as an Internet of Everything (IoE) device or an Internet of Things (IoT) device. UE 115a-115d is an example of a mobile smart phone type device that accesses the 5G network 100, and the UE can also be a machine specifically configured for connecting communications, including machine type communications (MTC), enhanced MTC (eMTC), narrowband IoT (NB-IoT), etc. UE 115e-115k is an example of various machines configured for communication to access the 5G network 100. The UE can be able to communicate with any type of base station, whether it is a macro base station, a small cell, etc. In Figure 1 In the present invention, lightning (e.g., communication link) indicates wireless transmission between the UE and a serving base station (a serving base station is a base station designated to serve the UE on the downlink and / or uplink), or expected transmission between base stations, and backhaul transmission between base stations.

[0037] exist Figure 1In operation of the present invention, the base station 105 and / or the UE 115 can operate in full-duplex mode. Therefore, in addition to external interference, one or more of the base station 105 and / or the UE 115 may experience self-interference associated with its full-duplex mode transmission. Therefore, according to the concepts of the present disclosure, some or all of the base stations 105 and / or the UE 115 can be configured for duplex mode repair. For example, a wireless station (e.g., base station 105, UE 115, etc.) configured according to some aspects can implement duplex mode repair when problems related to self-interference are identified.

[0038] In operation at the 5G network 100, base stations 105a-105c use 3D beamforming and coordinated spatial techniques (such as coordinated multipoint (CoMP) or multi-connectivity) to serve UEs 115a and 115b. Macro base station 105d performs backhaul communications with base stations 105a-105c and small cells, base station 105f. Macro base station 105d also transmits multicast services that are subscribed to and received by UEs 115c and 115d. Such multicast services may include mobile TV or streaming video, or may include other services for providing community information, such as weather emergencies or alerts, such as Amber Alerts or Gray Alerts.

[0039] The 5G network 100 also supports mission-critical communications with ultra-reliable and redundant links for mission-critical devices, such as UE 115e, which is a drone. Redundant communication links with UE 115e include from macro base stations 105d and 105e and small cell base station 105f. Other machine-type devices, such as UE 115f (thermometer), UE 115g (smart meter), and UE 115h (wearable device) can communicate directly with base stations (such as small cell base station 105f and macro base station 105e) through the 5G network 100, or in a multi-hop configuration by communicating with another user device that relays its information to the network, such as UE 115f transmitting temperature measurement information to smart meter UE 115g, which then reports to the network through small cell base station 105f. The 5G network 100 may also provide additional network efficiencies through dynamic, low-latency TDD / FDD communications, such as in a vehicle-to-vehicle (V2V) mesh network between UEs 115i - 115k communicating with a macro base station 105e .

[0040] Figure 2 A block diagram shows a design of a base station 105 and a UE 115, which may be Figure 1One of the base stations and one of the UEs in the base station 105. At the base station 105, the transmit processor 220 can receive data from the data source 212 and control information from the controller / processor 240. The control information can be used for PBCH, PCFICH, PHICH, PDCCH, EPDCCH, MPDCCH, etc. The data can be used for PDSCH, etc. The transmit processor 220 can process (e.g., encode and symbol map) the data and control information to obtain data symbols and control symbols, respectively. The transmit processor 220 can also generate reference symbols, for example, for PSS, SSS, and cell-specific reference signals. The transmit (TX) multiple-input multiple-output (MIMO) processor 230 can perform spatial processing (e.g., precoding) on ​​data symbols, control symbols, and / or reference symbols (if applicable), and can provide output symbol streams to modulators (MOD) 232a to 232t. Each modulator 232 can process a corresponding output symbol stream (e.g., for OFDM, etc.) to obtain an output sample stream. Each modulator 232 may further process (eg, convert to analog, amplify, filter, and upconvert) the output sample stream to obtain a downlink signal. The downlink signals from modulators 232a through 232t may be transmitted via antennas 234a through 234t, respectively.

[0041] At the UE 115, antennas 252a to 252r may receive downlink signals from the base station 105 and may provide received signals to demodulators (DEMODs) 254a to 254r, respectively. Each demodulator 254 may condition (e.g., filter, amplify, downconvert, and digitize) a corresponding received signal to obtain input samples. Each demodulator 254 may further process the input samples (e.g., for OFDM, etc.) to obtain received symbols. A MIMO detector 256 may obtain received symbols from all demodulators 254a to 254r, perform MIMO detection on the received symbols if applicable, and provide detected symbols. A receive processor 258 may process (e.g., demodulate, deinterleave, and decode) the detected symbols, provide decoded data for the UE 115 to a data sink 260, and provide decoded control information to a controller / processor 280.

[0042] On the uplink, at the UE 115, a transmit processor 264 may receive and process data from a data source 262 (e.g., for a physical uplink shared channel (PUSCH)) and control information from a controller / processor 280 (e.g., for a physical uplink control channel (PUCCH)). The transmit processor 264 may also generate reference symbols for reference signals. If applicable, the symbols from the transmit processor 264 may be precoded by a TX MIMO processor 266, further processed by modulators 254a-254r (e.g., for SC-FDM, etc.), and transmitted to the base station 105. At the base station 105, the uplink signal from the UE 115 may be received by the antenna 234, processed by the demodulator 232, detected by the MIMO detector 236 if applicable, and further processed by the receive processor 238 to obtain decoded data and control information transmitted by the UE 115. Processor 238 may provide decoded data to a data sink 239 and decoded control information to controller / processor 240 .

[0043] Controllers / processors 240 and 280 may direct the operation at base station 105 and UE 115, respectively. Controller / processor 240 and / or other processors and modules at base station 105 may perform or direct the execution of various processes for the techniques described herein. Controller / processor 280 and / or other processors and modules at UE 115 may also perform or direct the execution of various processes for the techniques described herein. For example, controller / processor 240 and / or controller / processor 280 may perform or direct the execution of various processes for the techniques described herein. Figures 5 to 8 The functional blocks shown and / or other processes for the techniques described herein may be executed. Memories 242 and 282 may store data and program codes for base station 105 and UE 115, respectively. Scheduler 244 may schedule UEs for data transmission on the downlink and / or uplink.

[0044] Wireless communication stations (e.g., base stations 105, UEs 115, etc.) operating within 5G network 100 may use a variety of communication technologies. For example, Figure 1 Any and all of the base stations 105 and UEs 115 shown in FIG. 1 can implement full-duplex mode with respect to their wireless communications, for example, to optimize the use of available spectrum. As discussed in detail below, when problems with self-interference are identified in accordance with the concepts of the present disclosure, one or more wireless communication stations implement duplex mode repair to facilitate signal communication.

[0045] FIG. 3A to FIG. 3C Various configurations of full-duplex mode that may be used by wireless communication stations of the 5G network 100 are shown. Accordingly, Figure 3D1 shows a configuration of a half-duplex mode that can be used by a wireless communication station of the 5G network 100. It should be understood that FIG. 3A to FIG. 3D Examples are presented with respect to duplex mode configurations that may be used, and are not intended to limit the specific duplex mode configurations that may be utilized by wireless communication stations implementing duplex mode repair according to the concepts of this disclosure.

[0046] As in FIG. 3A to FIG. 3C As can be seen in FIG, the uplink signal 301 of the full-duplex mode overlaps with the downlink signal 302 in time. That is, a wireless communication station implementing the full-duplex mode for wireless communication transmits and receives at the same time. In contrast, a wireless communication station implementing the half-duplex mode for wireless communication transmits and receives at different times. Therefore, Figure 3D The exemplary half-duplex mode uplink signal 311 is shown not overlapping in time with the downlink one-way signal 312 .

[0047] like FIG. 3A to FIG. 3C As shown in the example of , various configurations can be used with respect to full-duplex mode. For example, Figure 3A and Figure 3B An example of in-band full-duplex is shown, where an uplink signal 301 of the full-duplex mode overlaps with a downlink signal 302 in time and frequency. That is, the uplink signal and the downlink signal at least partially share the same time and frequency resources (e.g., the uplink signal and the downlink signal overlap in full or in part in the time domain and the frequency domain). In another configuration of the full-duplex mode, Figure 3C An example of sub-band full-duplex is shown, where an uplink signal 301 in full-duplex mode overlaps with a downlink signal 302 in time, but not in frequency. That is, the uplink signal and the downlink signal at least partially share the same time resources (e.g., the uplink signal and the downlink signal overlap in full or in part in the time domain), but do not share the same frequency resources. Figure 3C In the example shown, uplink signal 301 and downlink signal 302 are separated in the frequency domain by a guard band 303 (eg, a relatively narrow amount of spectrum separating the frequency bands occupied by uplink and downlink signals).

[0048] Although full-duplex mode is used for wireless communication (such as FIG. 3A to FIG. 3CThe modes in the wireless communication technology (such as those in the wireless communication technology) are conducive to the efficient use / reuse of the wireless spectrum, but these communication technologies may introduce problems with self-interference experienced by wireless communication stations implementing full-duplex communication technology. For example, the use of shared frequency and time resources according to the in-band full-duplex configuration is prone to self-interference due to the co-location transmission and reception of signals overlapping the carrier frequency at the same time. Even if the carrier frequency is separated by the protection band according to the sub-band full-duplex configuration, the signal is easily self-interference when it is co-located and received simultaneously because the carrier frequency separation at the wireless communication station is relatively small and the signal strength of the transmitted signal is high relative to the received signal. This self-interference introduced by full-duplex wireless communication may cause transmission and / or reception failure during wireless communication. As an example, the base station may not be able to receive the random access request message sent by the UE on the uplink due to interference from the downlink transmission of the base station using the full-duplex mode during the random access phase of wireless communication. Similarly, the UE may not be able to receive the random access response message sent by the base station on the downlink due to interference from the uplink transmission of the UE using the full-duplex mode during the random access phase of wireless communication. As another example, when a wireless communication station is to receive higher priority communications while the wireless communication station is sending lower priority communications using full-duplex mode, the higher priority communications may be impaired due to transmission self-interference (e.g., a full-duplex UE has higher priority downlink communications and lower priority uplink communications).

[0049] FIG. 4A to FIG. 4C An exemplary example of self-interference introduced by full-duplex wireless communication is shown. It should be understood that FIG. 4A to FIG. 4C 1 is a portion of a 5G network 100 selected to illustrate self-interference, and the specific base stations and UEs depicted are not intended to limit the various wireless communication stations that may be affected by self-interference or that may implement duplex mode repair according to the concepts of the present disclosure.

[0050] exist Figure 4A In the example of , base stations 105d and 105e each operate in full-duplex mode, while UEs 115c and 115d each operate in half-duplex mode. In this example, base station 105d uses shared time resources and possibly shared frequency resources to receive uplink signals 401 and transmit downlink signals 402. Therefore, in addition to external interference (e.g., interference 451 from base station 105e), base station 105d experiences self-interference 450 associated with the transmission of downlink signals 402 when attempting to receive uplink signals 401.

[0051] exist Figure 4BIn the example of , base station 105d and UE 115c each operate in full-duplex mode. In this example, UE 115c uses shared time resources and possibly shared frequency resources to transmit uplink signals 401 and receive downlink signals 402. Therefore, in addition to external interference (e.g., interference 452 from base station 105e and interference 453 from UE 115d), UE 115c experiences self-interference 450 associated with the transmission of uplink signal 401 when attempting to receive downlink signal 402.

[0052] exist Figure 4C In the example of , UE 115c operates in full-duplex mode (eg, implementing a multiple transmit and receive (multi-TRP) architecture). Figure 4B As in the example of UE 115c, UE 115c uses shared time resources and possibly shared frequency resources to transmit uplink signal 401 and receive downlink signal 402. Therefore, UE 115c experiences self-interference 450 associated with the transmission of uplink signal 401 when attempting to receive downlink signal 402.

[0053] Each of the above self-interference examples associated with full-duplex wireless communications may result in transmission and / or reception failures during wireless communications. To facilitate signal communications, a wireless communication station operating in full-duplex mode may implement duplex mode repair when a problem with self-interference is identified. Figure 5 An example of operations for implementing duplex mode repair by a wireless communication station (eg, base station 105, UE 115, etc.) in accordance with aspects of the present disclosure is shown. Figures 6 to 8 An example of operations for implementing duplex mode repair by a wireless communication station for various communication scenarios is shown. Specifically, Figure 6 and Figure 7 shows an example of random access phase communication, and Figure 8 An example of communications with different priorities is shown.

[0054] First reference Figure 5In the generalized flow 500 of FIG. 5 , at block 501, a wireless communication station operating in full-duplex mode analyzes one or more aspects of signal communications with respect to self-interference. For example, logic of the base station 105 (e.g., self-interference logic executed by the controller / processor 240) or logic of the UE 115 (e.g., self-interference analysis logic executed by the controller / processor 280) may analyze various aspects of signal communications currently being performed and scheduled to be performed to determine whether there may be one or more issues with respect to self-interference. As an example, the logic of the wireless communication station may determine that the wireless communication station is operating in full-duplex mode and that one or more expected signals have not yet or may not yet have been received (e.g., signals in response to signals sent by the wireless communication station, signals expected within a period of time or under current operating conditions, etc.). As another example, the logic of the wireless communication station may determine that the wireless communication station is operating in full-duplex mode and high priority information (e.g., data for low latency applications, retransmission requests, etc.) is scheduled for transmission to the wireless communication station, and its reception may be affected by the full-duplex transmission of the wireless communication station.

[0055] At block 502 of process 500, when the analysis determines that some aspect of one or more aspects of the signal communication has a problem with self-interference, the wireless communication station implements a duplex mode repair. For example, logic of base station 105 (e.g., duplex mode repair logic executed by controller / processor 240) or logic of UE 115 (e.g., duplex mode repair logic executed by controller / processor 280) can implement one or more changes to full-duplex operation of the wireless communication station based on determining that a problem with self-interference may be experienced or is being experienced. The one or more changes implemented with respect to full-duplex operation of the wireless communication station can be selected, for example, based on the specific signal communication, the specific problem identified with self-interference, the capabilities of the wireless communication station, a pre-configured repair schedule (e.g., configured by the network), etc.

[0056] As an example of a change that may be implemented with respect to full-duplex operation, the wireless communication station may be operable to increase interference cancellation performed by the wireless communication station. For example, where sufficient processing capability and electrical power are available, the wireless communication station may apply more powerful interference cancellation by implementing more cores for interference cancellation. Increasing interference cancellation may sufficiently repair self-interference to facilitate satisfactory reception of signal communications while the wireless communication station continues to operate in full-duplex mode.

[0057] As another example of a change that can be implemented with respect to full-duplex operation, the wireless communication station can additionally or alternatively operate to change the full-duplex mode. For example, the wireless communication station can fall back from in-band full-duplex to sub-band full-duplex. It should be understood that although in-band full-duplex is advantageous for both uplink and downlink to have a relatively large bandwidth, the use of shared frequency resources and time resources is prone to self-interference due to the simultaneous co-location of signals with overlapping carrier frequencies. Sub-band full-duplex, by utilizing carrier frequencies separated by guard bands, can repair self-interference to at least some extent. Therefore, falling back from in-band full-duplex to sub-band full-duplex can fully repair self-interference to facilitate the wireless communication station to continue to operate in full-duplex mode while satisfactorily receiving signal communications. Since the carrier frequency separation at the wireless communication station is relatively small and the signal strength of the transmitted signal is relatively high relative to the received signal, the sub-band full-duplex communication that implements simultaneous co-location transmission and reception of signals is prone to self-interference. Thus, in some cases, a wireless communication station may fall back from in-band full-duplex to half-duplex, or from sub-band full-duplex to half-duplex, to facilitate satisfactory reception of signal communications while the wireless communication station continues to operate in full-duplex mode.

[0058] According to aspects of the present disclosure, a wireless communication station may iteratively implement duplex mode repair (e.g., as represented by a dashed line returning from block 502 of process 500 to block 501). For example, a wireless communication station may determine that some of one or more aspects of signal communication has problems with self-interference, and therefore implement a first level of duplex mode repair. Thereafter, the wireless communication station may further analyze the signal communication (e.g., as performed using duplex mode repair, as newly scheduled, etc.) and determine that some of one or more aspects of signal communication has problems with self-interference, and therefore implement a second level of duplex mode repair, and so on. For example, such iterative duplex mode repair may be performed through multiple duplex mode repair actions, such as from a duplex mode repair action supporting the highest bandwidth communication to a duplex mode repair action supporting the lowest bandwidth communication. For example, a wireless communication station may iteratively progress from in-band full-duplex with power efficient interference cancellation to in-band full-duplex with increased interference cancellation, from in-band full-duplex with increased interference cancellation to sub-band full-duplex, and from sub-band full-duplex to half-duplex. According to aspects of the invention, duplex mode repair may iterate from and between any combination of desired duplex mode repair actions.

[0059] Reference now Figure 6 and Figure 7, an exemplary implementation of the aforementioned duplex mode repair technology for random access phase communication is shown. For example, a random access channel (RACH) process may include a contention-based 4-step random access process, in which a UE wishing to access the network may send a first message (Msg1) in which a randomly selected preamble is sent to a base station via some RACH opportunities (RO). Thereafter, the UE may monitor a second message (Msg2) from the base station to facilitate establishing a link between the UE and the base station. For example, the second message may include a message of a physical downlink control channel (PDCCH) sent on a RACH response (RAR) window and / or a physical downlink shared channel (PDSCH), including time alignment (TA), a random access preamble ID (RAPID), an uplink grant, and the like. The UE that has received the second message may send a third message (Msg3) for a contention resolution sequence in an uplink grant, and monitor a fourth message (Msg4) from the base station that provides contention resolution. It should be understood that in operation according to the above-described random access phase, when a full-duplex base station monitors RACH Msg1 while transmitting any downlink signal, the downlink signal interferes with the reception of Msg1 to at least some extent. Similarly, when a full-duplex UE monitors RACH Msg2 while transmitting any other uplink signal, the uplink signal interferes with the reception of Msg2 to at least some extent. If the UE fails to receive a second message (Msg2) in response to the first message (Msg1) from the base station, such as due to self-interference, the RACH process will not continue to establish a link between the UE and the base station. Similarly, if the base station fails to receive the first message (Msg1) from the UE, such as due to self-interference, the second message (Msg2) will not be sent, and the RACH process will not continue to establish a link between the UE and the base station.

[0060] Figure 6 An example of a UE implementing duplex mode repair for random access phase communications is shown. Figure 6 In the illustrated process 600, a wireless communication station (e.g., UE 115) operates in full-duplex mode and initiates a RACH procedure to establish a communication link with a base station (e.g., one of the base stations 105). Therefore, the wireless communication station sends a first message of a random access procedure at block 601. For example, UE 115 may send RACH Msg1 to one of the base stations 105 to attempt to establish a communication link with the base station.

[0061] At block 602 of process 600, the wireless communication station monitors a second message of a random access procedure in response to the first message. For example, UE 115 may monitor the RAR window of the PDCCH and / or PDSCH of RACH Msg2 sent by base station 105 in response to Msg1.

[0062] exist Figure 6 In block 603 of the process 600 shown, the wireless communication station operating in full-duplex mode analyzes one or more aspects of signal communication with respect to self-interference, and determines that the second message has not been received after the first message has been sent a threshold number of times. For example, the logic of UE 115 (e.g., the self-interference analysis logic executed by the controller / processor 280) can analyze the communication signal received by the UE to determine whether RACH Msg2 has been detected after the Msg1 has been sent a threshold number of times (e.g., the UE has sent N RACH Msg1s without detecting a response Msg2, where N can be any integer value determined to be suitable, such as 1-10). The logic of UE 115 can identify that the failure to detect RACH Msg2 in response to the UE sending the necessary number of Msg1s indicates a problem with self-interference (e.g., self-interference may exist according to the use of shared frequency and / or time resources in full-duplex operation, resulting in a failure of transmission and / or reception during wireless communication). For example, the transmission of the uplink signal may make it more difficult for the UE to detect Msg2 (e.g., the network detects RACH Msg1 and sends a response, but the UE cannot decode it).

[0063] At block 604 of process 600, the wireless communication station implements a duplex mode repair that changes the duplex mode. For example, the logic of UE 115 (e.g., the duplex mode repair logic executed by the controller / processor 280) may implement one or more changes regarding the full-duplex operation of the wireless communication station based on determining that RACH Msg2 is not detected after sending Msg1 a threshold number of times. For example, the duplex mode repair that changes the duplex mode may cause a wireless communication station operating in an in-band full-duplex mode to fall back to a sub-band full-duplex mode or a half-duplex mode. Similarly, according to some aspects of the present disclosure, the duplex mode repair that changes the duplex mode may, for example, cause a wireless communication station operating in a sub-band full-duplex mode to fall back to a half-duplex mode. Figure 5 As with the more general process of FIG. 6 , the wireless communication station may iteratively perform duplex mode repair according to process 600 (eg, returning from block 604 of process 600 to block 601).

[0064] Figure 7 An example of a base station implementing duplex mode repair for random access phase communications is shown. Figure 7In the illustrated process 700, a wireless communication station (e.g., base station 105) operates in full-duplex mode and monitors a first message of a RACH procedure for establishing a communication link with another wireless communication station (e.g., one of UEs 115). Thus, at block 701, the wireless communication station monitors a first message of a random access procedure. For example, base station 105 may monitor RACH Msg1 sent by UE 105 to base station 105 in an attempt to establish a communication link with the base station.

[0065] exist Figure 7 At block 702 of the process 700 shown in , a wireless communication station operating in full-duplex mode analyzes one or more aspects of signal communication with respect to self-interference, and determines that the wireless communication station has excessively failed to receive a first message. For example, the logic of the base station 105 (e.g., the self-interference analysis logic executed by the controller / processor 240) can analyze the communication signal received by the base station to estimate the number of instances in which the first message was sent by the wireless communication station but was not successfully received. According to some aspects of the present disclosure, hypothesis testing or machine learning techniques can be applied to the received signal, and the logic of the base station 105 is used to estimate the possible number of preambles that form RACH Msg1 that are sent but not successfully detected in a given RO. This estimation of the preamble that forms RACH Msg1 may be possible, although the recovery of RACH Msg1 may still fail (e.g., due to self-interference). In another example, after establishing a communication connection with the wireless communication station, the logic of the base station 105 may receive data from a second wireless communication station (e.g., UE 115) regarding the number of times the first message was retransmitted through a second wireless communication before establishing a communication connection with the wireless communication station. Regardless of the specific technique used, the logic of the base station 105 can identify excessive failure of the base station to receive the first message as indicating a problem with self-interference (e.g., self-interference may exist based on full-duplex operation using shared frequency and / or time resources, resulting in transmission and / or reception failures during wireless communications).

[0066] At block 703 of process 700, the wireless communication station implements a duplex mode repair that changes the duplex mode. For example, logic of the base station 105 (e.g., duplex mode repair logic executed by the controller / processor 240) may implement one or more changes regarding full-duplex operation of the wireless communication station based on determining that the base station has excessively failed to receive RACH Msg1. For example, the duplex mode repair that changes the duplex mode may cause a wireless communication station operating in an in-band full-duplex mode to fall back to a sub-band full-duplex mode or a half-duplex mode. Similarly, according to some aspects of the present disclosure, the duplex mode repair that changes the duplex mode may, for example, cause a wireless communication station operating in a sub-band full-duplex mode to fall back to a half-duplex mode. Figure 5As with the more general process of FIG. 700 , the wireless communication station may iteratively perform duplex mode repair according to process 700 (eg, returning from block 703 of process 700 to block 701 ).

[0067] It should be understood that the problem of self-interference is not limited to the problem of the exemplary random access process discussed above. Self-interference typically causes transmission / reception failures during the entire communication process. In particular, the priorities of different channels present challenges in terms of self-interference. When a full-duplex UE has a high-priority downlink and a low-priority uplink, the high-priority signal may be impaired due to uplink self-interference. For example, ultra-reliable low latency communication (URLLC) may have a different priority (e.g., a higher priority) than other transmissions (e.g., enhanced mobile broadband (eMBB)). In the case of receiving URLLC while transmitting eMBB in full-duplex mode, the self-interference sent by eMBB will at least interfere with the URLLC to some extent, where such self-interference may reduce the reliability of the URLLC downlink. Likewise, different priorities exist within eMBB (e.g., PUSCH and downlink hybrid automatic repeat request (DL-HARQ). Assuming that HARQ transmission has a higher priority, if PUSCH transmission is combined with DL-HARQ reception in full-duplex operation, the uplink transmission may compromise the reliability of the high-priority downlink. If downlink reception keeps failing, one reason may be self-interference of full-duplex transmission.

[0068] Figure 8 An example implementation of a duplex mode repair technique for communications with different priorities is shown. Figure 8In block 801, a wireless communication station operating in full-duplex mode analyzes one or more aspects of signal communications with respect to self-interference and determines that the signal communications include transmission or reception of a first communication and reception or transmission of a second communication, wherein the first communication has a higher priority than the second communication. For example, logic of base station 105 (e.g., self-interference logic executed by controller / processor 240) or logic of UE 115 (e.g., self-interference analysis logic executed by controller / processor 280) can analyze various aspects of signal communications currently being performed (e.g., to determine the channel being used, the type of data being sent, a specific application associated with the communication, etc.) to identify that one communication (e.g., a downlink communication signal) has a higher priority than another communication (e.g., an uplink communication signal) and determine that one or more issues with self-interference may exist. As another example, logic of base station 105 or logic of UE 115 may analyze various aspects of a signal communication scheduled for transmission (e.g., analyzing data in a transmission queue, downlink control information (DCI), etc.) to identify that one communication (e.g., a downlink communication signal) has a higher priority than another communication (e.g., an uplink communication signal) and determine that one or more issues regarding self-interference may exist. As a result, the logic of the wireless communication station may determine that the wireless communication station is operating in full-duplex mode and that high priority information may be compromised by full-duplex transmission of the wireless communication station.

[0069] At block 802 of process 800, the wireless communication station implements a duplex mode repair that is configured to facilitate communications of higher priority communications. For example, logic of the base station 105 (e.g., duplex mode repair logic executed by the controller / processor 240) or logic of the UE 115 (e.g., duplex mode repair logic executed by the controller / processor 280) may implement one or more changes regarding full-duplex operation of the wireless communication station based on a determination that issues regarding self-interference may be experienced or are being experienced. For example, a duplex mode repair that changes the duplex mode may enable a wireless communication station operating in an in-band full-duplex mode to increase interference cancellation and / or fall back to a sub-band full-duplex mode or a half-duplex mode. Similarly, according to some aspects of the present disclosure, a duplex mode repair that changes the duplex mode may, for example, enable a wireless communication station operating in a sub-band full-duplex mode to increase interference cancellation and / or fall back to a half-duplex mode. Figure 5 As with the more general process of FIG. 8 , the wireless communication station may iteratively perform duplex mode repair according to process 800 (eg, returning from block 802 to block 801 of process 800).

[0070] Fig. 9 A block diagram illustrating a UE 915 configured according to one aspect of the present disclosure is shown. The UE 915 includes a Figure 21. For example, the UE 915 includes a controller / processor 280 that operates to execute logic or computer instructions stored in a memory 282 and to control components of the UE 915 that provide features and functions of the UE 915. The UE 915 transmits and receives signals via radios 910a-r and antennas 252a-r under the control of the controller / processor 280. The radios 910a-r include various components and hardware, such as Figure 2 As shown for UE 115, modulators / demodulators 254a-r, MIMO detector 256, receive processor 258, transmit processor 264, and TX MIMO processor 266 are included.

[0071] exist Fig. 9 In the example of , UE 915 includes self-interference analysis logic 902, such as may include logic for analyzing one or more aspects of signal communication and determining whether there is a problem with self-interference. For example, self-interference analysis logic 902 may perform and / or control analysis of signal communication as discussed above with respect to block 501 of process 500, block 603 of process 600, block 702 of process 700, and / or block 801 of process 800.

[0072] Fig. 9 The UE 915 shown in FIG. 9 also includes a duplex mode repair logic 903, such as may include logic for implementing a duplex mode repair when the self-interference analysis logic 902 determines that there is a problem with self-interference. For example, the duplex mode repair logic 903 may perform and / or control the duplex mode repair as discussed above with respect to block 502 of process 500, block 604 of process 600, block 703 of process 700, and / or block 802 of process 800.

[0073] Fig.10 A block diagram illustrating a base station 1005 configured according to one aspect of the present disclosure is shown. The base station 1005 includes Figure 2 1005. For example, the base station 1005 includes a controller / processor 240 that operates to execute logic or computer instructions stored in a memory 242 and to control components of the base station 1005 that provide the features and functions of the base station 1005. The base station 1005 transmits and receives signals via the radios 1010a-t and antennas 234a-t under the control of the controller / processor 240. The radios 1010a-t include various components and hardware, such as Figure 2 As shown for base station 105, it includes modulators / demodulators 232a-t, MIMO detector 236, receive processor 238, transmit processor 220 and TX MIMO processor 230.

[0074] exist Fig.10 In the example of , base station 1005 includes self-interference analysis logic 1002, such as may include logic for analyzing one or more aspects of signal communication and determining whether there is a problem with self-interference. For example, self-interference analysis logic 1002 may perform and / or control analysis of signal communication as discussed above with respect to block 501 of process 500, block 603 of process 600, block 702 of process 700, and / or block 801 of process 800.

[0075] Fig.10 The base station 1015 shown in also includes duplex mode repair logic 1003, such as may include logic for implementing duplex mode repair when the self-interference analysis logic 1002 determines that there is a problem with self-interference. For example, the duplex mode repair logic 1003 may perform and / or control duplex mode repair as discussed above with respect to block 502 of process 500, block 604 of process 600, block 703 of process 700, and / or block 802 of process 800.

[0076] Those skilled in the art will appreciate that any of a variety of different technologies and techniques may be used to represent information and signals. For example, data, instructions, commands, information, signals, bits, symbols, and chips that may be referenced throughout the above specification may be represented by voltages, currents, electromagnetic waves, magnetic fields or particles, optical fields or particles, or any combination thereof.

[0077] Figures 5 to 8 The functional blocks and modules in may include processors, electronic devices, hardware devices, electronic components, logical circuits, memories, software codes, firmware codes, etc., or any combination thereof.

[0078] Those skilled in the art may further appreciate that various illustrative logic blocks, modules, circuits and algorithmic steps described in conjunction with the disclosure herein may be implemented as electronic hardware, computer software or a combination of the two. In order to clearly illustrate this interchangeability of hardware and software, various illustrative components, blocks, modules, circuits and steps have been described above generally according to their functions. Whether such functions are implemented as hardware or software depends on specific applications and the design constraints imposed according to the overall system. The technician may implement the functions in different ways for each specific application, but such implementation decision should not be interpreted as causing a departure from the scope of the present disclosure. Those skilled in the art will also readily recognize that the order or combination of components, methods or interactions described herein are merely examples, and the components, methods or interactions of various aspects of the present disclosure may be combined or performed in a manner other than those illustrated and described herein.

[0079] The various illustrative logical blocks, modules, and circuits described in conjunction with the disclosure herein may be implemented or executed with a general purpose processor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or any combination thereof, designed to perform the functions described herein. A general purpose processor may be a microprocessor, but alternatively, the processor may be any conventional processor, controller, microcontroller, or state machine. The processor may also be implemented as a combination of computing devices, for example, a combination of a DSP and a microprocessor, a plurality of microprocessors, a combination of one or more microprocessors with a DSP core, or any other such configuration.

[0080] The steps of the method or algorithm described in conjunction with the disclosure herein may be directly embodied in hardware, in a software module executed by a processor, or in a combination of the two. The software module may reside in a RAM memory, a flash memory, a ROM memory, an EPROM memory, an EEPROM memory, a register, a hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art. An exemplary storage medium is coupled to a processor so that the processor can read information from the storage medium and write information to the storage medium. Alternatively, the storage medium may be integrated with the processor. The processor and the storage medium may reside in an ASIC. The ASIC may reside in a user terminal. Alternatively, the processor and the storage medium may reside in a user terminal as discrete components.

[0081] In one or more exemplary designs, the functions described can be implemented in hardware, software, firmware, or any combination thereof. If implemented in software, the functions can be stored on a computer-readable medium or sent via a computer-readable medium as one or more instructions or codes. Computer-readable media include computer storage media and communication media, which include any media that are conducive to transferring a computer program from one place to another. Computer-readable storage media can be any available media that can be accessed by a general or special-purpose computer. By way of example and not limitation, such computer-readable media may include RAM, ROM, EEPROM, CD-ROM or other optical disk storage devices, magnetic disk storage devices or other magnetic storage devices, or any other media that can be used to carry or store a desired program code device, which is in the form of an instruction or data structure and can be accessed by a general or special-purpose computer or a general or special-purpose processor. In addition, any connection can be appropriately referred to as a computer-readable medium. For example, if the software is sent from a website, server, or other remote source using a coaxial cable, fiber optic cable, twisted pair, or digital subscriber line (DSL), the coaxial cable, fiber optic cable, twisted pair, or DSL can be included in the definition of the medium. As used herein, disk and disc include compact disc (CD), laser disc, optical disc, digital versatile disc (DVD), floppy disk and Blu-ray disc, where disks usually reproduce data magnetically, while discs reproduce data optically with lasers. Combinations of the above should also be included within the scope of computer-readable media.

[0082] As used herein, when used in a list of two or more items, the term "and / or" means that any one of the listed items is taken alone, or a combination of two or more of the listed items may be taken. For example, if a composition is described as comprising components A, B, and / or C, the composition may comprise: only A; only B; only C; a combination of A and B; a combination of A and C; a combination of B and C; or a combination of A, B, and C. Moreover, as used herein, including in the claims, "or" used in a list of items beginning with "at least one" means a disjunctive list, so that, for example, a list of "at least one of A, B, or C" means A or B or C, or AB or AC or BC, or ABC (i.e., A and B and C), or any combination of any of them.

[0083] The above description of the present disclosure is provided to enable those skilled in the art to implement or use the present disclosure. Various modifications to the present disclosure will be apparent to those skilled in the art, and the general principles defined herein may be applied to other variations without departing from the spirit or scope of the present disclosure. Therefore, the present disclosure is not intended to be limited to the examples and designs described herein, but should be given the broadest scope consistent with the principles and novel features disclosed herein.

Claims

1. A method of wireless communication, comprising: analyzing one or more aspects of signal communication with respect to self-interference by a wireless communication station operating in a full-duplex mode; as well as When the analyzing determines that an aspect of the one or more aspects of the signal communication has a problem with self-interference, performing, by the wireless communication station, iterative duplex mode repair by backing off from the full-duplex mode to facilitate the signal communication and by stepping through a plurality of duplex mode repair actions, The iterative duplex mode repair comprises iteratively progressing from in-band full duplex with power efficient interference cancellation to in-band full duplex with increased interference cancellation, from in-band full duplex with increased interference cancellation to sub-band full duplex, and from sub-band full duplex to half duplex.

2. The method of claim 1 , wherein falling back from the full-duplex mode comprises a full-duplex fallback selected from the group consisting of: Fallback from in-band full-duplex mode to sub-band full-duplex mode; Falling back from the in-band full-duplex mode to the half-duplex mode; as well as Falling back from the sub-band full-duplex mode to the half-duplex mode.

3. The method according to claim 1, further comprising: The wireless communication station in the full-duplex mode sends a first message of a random access procedure; as well as The random access procedure is monitored, by the wireless communication station, for a second message in response to the first message, wherein the aspect of the signal communication determined to have issues with self-interference includes identifying a failure to receive the second message.

4. The method according to claim 1, further comprising: The wireless communication station in sub-band full-duplex mode sends a first message of a random access procedure; as well as The wireless communication station monitors a second message of the random access procedure, wherein when the analysis determines that the second message has not been received after sending the first message a threshold number of times, the duplex mode repair is implemented to change the sub-band full-duplex mode by falling back from the full-duplex mode.

5. The method of claim 4, wherein changing the sub-band full-duplex mode by performing duplex mode repair comprises: Falling back from the full-duplex mode to the half-duplex mode of the sub-band.

6. The method according to claim 1, further comprising: A first message of a random access procedure is monitored by the wireless communication station operating in the full-duplex mode, wherein the aspect of the signal communication determined to have issues with self-interference includes identifying a failure to receive the first message.

7. The method of claim 1 , wherein implementing the duplex mode restoration by falling back from the full-duplex mode comprises: Falling back from the full-duplex mode to the half-duplex mode.

8. A method according to claim 1, wherein the analysis of one or more aspects of signal communication determines that the signal communication includes the transmission or reception of a first communication and the reception or transmission of a second communication, wherein the priority of the first communication is higher than the priority of the second communication, and wherein when the analysis determines that there is a problem with self-interference, the duplex mode repair is implemented by falling back from the full-duplex mode to change the full-duplex mode to facilitate the communication of the first communication.

9. The method of claim 8, wherein the full-duplex mode comprises an in-band full-duplex mode, and wherein changing the full-duplex mode comprises: Falling back from the in-band full-duplex mode to the sub-band full-duplex mode.

10. The method of claim 8, wherein the full-duplex mode comprises an in-band full-duplex mode, and wherein changing the full-duplex mode comprises: Falling back from the in-band full-duplex mode to half-duplex mode.

11. The method of claim 8, wherein the full-duplex mode comprises a sub-band full-duplex mode, and wherein changing the full-duplex mode comprises: Falling back from the full-duplex mode to the half-duplex mode of the sub-band.

12. An apparatus configured for wireless communication, comprising: means for analyzing one or more aspects of signal communication with respect to self-interference by a wireless communication station operating in a full-duplex mode; as well as means for implementing, by the wireless communication station, iterative duplex mode repair by backing off from the full duplex mode to facilitate the signal communication and by stepping through a plurality of duplex mode repair actions when the analyzing determines that an aspect of the one or more aspects of the signal communication has problems with self-interference, The iterative duplex mode repair comprises iteratively progressing from in-band full duplex with power efficient interference cancellation to in-band full duplex with increased interference cancellation, from in-band full duplex with increased interference cancellation to sub-band full duplex, and from sub-band full duplex to half duplex.

13. The apparatus according to claim 12, further comprising: means for sending, by the wireless communication station in the full-duplex mode, a first message of a random access procedure; as well as means for monitoring, by the wireless communication station in response to the first message, a second message of the random access procedure, wherein the aspect of the signal communication determined to present a problem with self-interference comprises identifying a failure to receive the second message.

14. The apparatus according to claim 12, further comprising: means for sending, by the wireless communication station in sub-band full-duplex mode, a first message of a random access procedure; as well as A component for monitoring a second message by the wireless communication station, wherein when the component for analyzing determines that the second message has not been received after sending the first message a threshold number of times, the duplex mode repair performed by falling back from the full-duplex mode changes the sub-band full-duplex mode by falling back from the sub-band full-duplex mode to the half-duplex mode.

15. The apparatus according to claim 12, further comprising: Means for monitoring, by the wireless communication station operating in the full-duplex mode, a first message of a random access procedure, wherein the aspect of the signal communication determined to present problems with self-interference comprises identifying a failure to receive the first message.

16. A non-transitory computer readable medium having recorded thereon a program code configured for wireless communication, the program code being executable by one or more processors to cause the one or more processors to: analyzing one or more aspects of signal communication by a wireless communication station operating in a full-duplex mode with respect to self-interference; and When the analysis determines that an aspect of the one or more aspects of the signal communication has a problem with self-interference, the wireless communication station performs iterative duplex mode repair by backing off from the full-duplex mode to facilitate the signal communication and by stepping through a plurality of duplex mode repair actions, The iterative duplex mode repair comprises: Iteratively progresses from in-band full duplex with power efficient interference cancellation to in-band full duplex with increased interference cancellation, from in-band full duplex with increased interference cancellation to sub-band full duplex, from sub-band full duplex to half-duplex.

17. The non-transitory computer readable medium of claim 16, wherein the program code further causes the one or more processors to: The wireless communication station in the full-duplex mode sends a first message of a random access procedure; and The random access procedure is monitored, by the wireless communication station, for a second message in response to the first message, wherein the aspect of the signal communication determined to have issues with self-interference includes identifying a failure to receive the second message.

18. The non-transitory computer readable medium of claim 16, wherein the program code further causes the one or more processors to: The wireless communication station in sub-band full-duplex mode sends a first message of a random access procedure; and A second message of the random access process is monitored by the wireless communication station, wherein when the analysis determines that the second message has not been received after sending the first message a threshold number of times, the duplex mode repair performed by falling back from the full-duplex mode changes the sub-band full-duplex mode by falling back from the sub-band full-duplex mode to the half-duplex mode.

19. The non-transitory computer readable medium of claim 16, wherein the program code further causes the one or more processors to: A first message of a random access procedure is monitored by the wireless communication station operating in the full-duplex mode, wherein the aspect of the signal communication determined to have issues with self-interference includes identifying a failure to receive the first message.

20. An apparatus configured for wireless communication, the apparatus comprising: at least one processor; as well as at least one memory, the at least one memory being communicatively coupled to the at least one processor and storing processor-readable code, the processor-readable code being configured, when executed by the at least one processor, to: analyzing one or more aspects of signal communication with respect to self-interference by a wireless communication station operating in a full-duplex mode; as well as When the analysis determines that there are problems with self-interference in one or more aspects of the signal communication, the wireless communication station implements iterative duplex mode repair by falling back from the full-duplex mode to facilitate the signal communication and by stepping through multiple duplex mode repair actions, wherein the iterative duplex mode repair includes: iteratively progressing from in-band full-duplex with power-efficient interference cancellation to in-band full-duplex with increased interference cancellation, from in-band full-duplex with increased interference cancellation to sub-band full-duplex, and from sub-band full-duplex to half-duplex.

21. The apparatus of claim 20, wherein falling back from the full-duplex mode comprises a full-duplex fallback selected from the group consisting of: Fallback from in-band full-duplex mode to sub-band full-duplex mode; Falling back from the in-band full-duplex mode to the half-duplex mode; as well as Falling back from the full-duplex mode to the half-duplex mode of the sub-band.

22. The apparatus of claim 20, wherein the at least one processor is further configured to: The wireless communication station in the full-duplex mode sends a first message of a random access procedure; and The random access procedure is monitored, by the wireless communication station, for a second message in response to the first message, wherein the aspect of the signal communication determined to have issues with self-interference includes identifying a failure to receive the second message.

23. The apparatus of claim 20, wherein the at least one processor is further configured to: The wireless communication station in sub-band full-duplex mode sends a first message of a random access procedure; and The wireless communication station monitors a second message of the random access process, wherein when analysis determines that the second message is not received after sending the first message a threshold number of times, the duplex mode repair is implemented to change the sub-band full-duplex mode by falling back from the duplex mode.

24. The apparatus of claim 23, wherein the at least one processor is configured to: The sub-band full-duplex mode is changed by falling back from the sub-band full-duplex mode to the half-duplex mode.

25. The apparatus of claim 20, wherein the at least one processor is further configured to: A first message of a random access procedure is monitored by the wireless communication station operating in the full-duplex mode, wherein the aspect of the signal communication determined to have issues with self-interference includes identifying a failure to receive the first message.

26. The apparatus of claim 25, wherein the at least one processor is configured to: The duplex mode restoration is implemented by falling back from the full-duplex mode to the half-duplex mode.

27. An apparatus according to claim 20, wherein the at least one processor configured to analyze one or more aspects of signal communication determines that the signal communication includes the sending or receiving of a first communication and the receiving or sending of a second communication, wherein the priority of the first communication is higher than the priority of the second communication, and when the analysis determines that there is a problem with self-interference, the duplex mode repair is implemented by falling back from the full-duplex mode to change the full-duplex mode to facilitate communication of the first communication.

28. The apparatus of claim 27, wherein the full-duplex mode comprises an in-band full-duplex mode, and wherein the at least one processor is configured to: The full-duplex mode is changed by falling back from the in-band full-duplex mode to a sub-band full-duplex mode.

29. The apparatus of claim 27, wherein the full-duplex mode comprises an in-band full-duplex mode, and wherein the at least one processor is configured to: The full-duplex mode is changed by falling back from the in-band full-duplex mode to a half-duplex mode.

30. The apparatus of claim 27, wherein the full-duplex mode comprises a sub-band full-duplex mode, and wherein the at least one processor is configured to: The full-duplex mode is changed by falling back from the sub-band full-duplex mode to the half-duplex mode.

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