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Sub-band selection at cellular base station for non-overlapped or partially overlapped full duplex operation

專(zhuān)利號(hào)
US12200629B2
公開(kāi)日期
2025-01-14
申請(qǐng)人
AT&T Intellectual Property I, L.P.（US GA Atlanta）
發(fā)明人
Aditya Chopra; Salam Akoum; Thomas Novlan
IPC分類(lèi)
H04W72/04; H04L5/00; H04L5/14; H04W52/24; H04W72/0446; H04W72/541
技術(shù)領(lǐng)域
receiver,or,band,sub,duplex,in,network,self,channel,be
地域： GA GA Atlanta

摘要

Aspects of the subject disclosure may include, for example, determining a self-interference channel response of a transceiver of a mobile base station having a transmitter and a receiver. The self-interference channel response spans multiple sub-bands of a predetermined mobile cellular frequency channel. A first sub-band of the multiple sub-bands is identified according to the self-interference channel response and, an estimate is determined, at the receiver, of a first coupled transmit power level of the transmitter when operating within the first sub-band. A receiver sensitivity is adjusted according to the first coupled transmit power level to obtain an adjustment adapted to increase receiver sensitivity, while restricting operation of the receiver to a substantially linear region. The adjustment allows a transmission within the first sub-band and a reception within a second sub-band of the plurality of sub-bands to occur simultaneously at the mobile base station. Other embodiments are disclosed.

說(shuō)明書(shū)

A frequency management plan that allocates distinct and different frequency bands that are dedicated to either transmit or receive operations may support duplex operations, in which transmission and reception may occur simultaneously, with the restriction that they operate in separate and distinct frequency bands, in which spectral separation may be ensured by imposing a minimum band gap between adjacent edges of either band. Even when distinct transmit and receive bands are utilized, however, it may be necessary to impose further restrictions by way of a duplex spacing. The example duplex spacing imposes a minimum frequency separation between an uplink reception fUL 203 and downlink transmission fDL 204 operations. According to the illustrative example, the duplex spacing is greater than the band gap, further restricting available frequencies for sub-band tuning.

Frequency division duplex (FDD) operation is standardized for mobile cellular communications according to “3rd Generation Partnership Project; Technical Specification Group Radio Access Network; Evolved Universal Terrestrial Radio Access (E-UTRA); User Equipment (UE) radio transmission and reception,” 3GPP TS 36.101, v15.18.0 (2022 March). The example standard discloses an LTE Bands & Frequencies that support FDD operation. By way of example, LTE band number 1, includes an uplink band defined between 1850-1910 MHz and a downlink band defined between 1930-1990 MHz. The bandwidths are 60 MHz in either band, with a specified band gap of 20 MHz and a specified duplex spacing of 80 MHz. Each of the specified LTE bands may support permissible combinations of channel bandwidths, e.g., 1.4 MHz, 3 MHZ, 5 MHz, 10 MHz, 15 MHz and 20 MHz, with each having a corresponding number of resource blocks, e.g., 6, 15, 25, 50, 75 and 100 according to the example channel bandwidths, respectively.

權(quán)利要求

1
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