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EP-4327474-B1 - MANAGING RADIO FREQUENCY (RF) PATHS FOR ANTENNA SWITCH DIVERSITY (ASDIV) USING EXTRACTOR IN NETWORK COEXISTENCE

EP4327474B1EP 4327474 B1EP4327474 B1EP 4327474B1EP-4327474-B1

Inventors

  • GOPAL, THAWATT
  • MCCLOUD, MICHAEL LEE
  • MALDONADO, DAVID
  • PAULINO, Joseph David
  • BANDARU, Sridhar
  • GURUMOORTHY, Shriram

Dates

Publication Date
20260506
Application Date
20220415

Claims (13)

  1. An apparatus (1100) for wireless communication, comprising: a memory (1112); and a processor (1104) coupled to the memory, wherein the processor is configured to: select a set of candidate radio frequency, RF, paths to be considered for transmit antenna switch diversity, ASDIV; detect that a metric for a first RF path, of the set of candidate RF paths, exceeds a threshold value, wherein the metric includes an estimated voltage standing wave ratio, VSWR, and wherein the threshold value is based on power amplifier ruggedness; and determine whether to remove or maintain the first RF path from the set of candidate RF paths in response to the detection.
  2. The apparatus of claim 1, wherein, in order to determine whether to remove or maintain the first RF path from the set of candidate RF paths in response to the detection, the processor is configured to: remove the first RF path if the metric exceeds the threshold value; or maintain the first RF path if the metric is less than or equal to the threshold value.
  3. The apparatus of claim 1, wherein the set of candidate RF paths are for ASDIV and sounding reference signal, SRS, antenna switching.
  4. The apparatus of claim 1, wherein at least one of the set of candidate RF paths is selected via at least one RF extractor circuit.
  5. The apparatus of claim 4, wherein the at least one RF extractor circuit is operable to perform diplex operations to switch between RF signals of a first radio access network, RAN, and RF signals of a second RAN.
  6. The apparatus of claim 5, wherein: the set of candidate RF paths are enabled by two or more antennas, wherein at least one of the two or more antennas is connected to the at least one RF extractor circuit; wherein the two or more antennas preferably comprise at least four antennas configured to perform the ASDIV.
  7. The apparatus of claim 5, wherein the RF extractor circuit is configured to receive RF signals from at least a first radio access network, RAN, or a second RAN.
  8. The apparatus of claim 7, wherein the first RAN comprises a wireless wide-area-network, WWAN.
  9. The apparatus of claim 8, wherein the WWAN comprises at least one of a LongTerm-Evolution, LTE, network or a New Radio, NR, network; wherein the first and second RAN preferably operate in at least partially overlapping frequency bands.
  10. The apparatus of claim 7, wherein the second RAN comprises a wireless local-area-network, WLAN.
  11. The apparatus of claim 10, wherein the second RAN comprises at least one of: an industrial, scientific, and medical, ISM, radio band network; a near-field communication network; or a short-range network.
  12. The apparatus of claim 8, wherein the second RAN comprises a wireless local-area-network, WLAN.
  13. A method (700) of wireless communication, comprising: selecting (710) a set of candidate radio frequency, RF, paths to be considered for transmit antenna switch diversity, ASDIV; detecting (720) that a metric for a first RF path, of the set of candidate RF paths, exceeds a threshold value, wherein the metric includes an estimated voltage standing wave ratio, VSWR, and wherein the threshold value is based on power amplifier ruggedness; and determining (730) whether to remove or maintain the first RF path from the set of candidate RF paths in response to the detection.

Description

CROSS REFERNCE TO RELATED APPLICATIONS This application claims priority to U.S. Application No. 17/721,098, filed April 14, 2022, which claims benefit to U.S. Provisional Patent Application No. 63/177,638, filed on April 21, 2021, which are assigned to the assignee hereof. BACKGROUND Field of the Disclosure Aspects of the present disclosure relate to wireless communications, and more particularly, to techniques for a UE to manage radio frequency (RF) paths for antenna switching diversity. Description of Related Art Wireless communication systems are widely deployed to provide various telecommunication services such as telephony, video, data, messaging, broadcasts, etc. These wireless communication systems may employ multiple-access technologies capable of supporting communication with multiple users by sharing available system resources (e.g., bandwidth, transmit power, etc.). Examples of such multiple-access systems include 3rd Generation Partnership Project (3GPP) Long Term Evolution (LTE) systems, LTE Advanced (LTE-A) systems, code division multiple access (CDMA) systems, time division multiple access (TDMA) systems, frequency division multiple access (FDMA) systems, orthogonal frequency division multiple access (OFDMA) systems, single-carrier frequency division multiple access (SC-FDMA) systems, and time division synchronous code division multiple access (TD-SCDMA) systems, to name a few. In some examples, a wireless multiple-access communication system may include a number of base stations (BSs), which are each capable of simultaneously supporting communication for multiple communication devices, otherwise known as user equipments (UEs). In an LTE or LTE-A network, a set of one or more base stations may define an eNodeB (eNB). In other examples (e.g., in a next generation, a new radio (NR), or 5G network), a wireless multiple access communication system may include a number of distributed units (DUs) (e.g., edge units (EUs), edge nodes (ENs), radio heads (RHs), smart radio heads (SRHs), transmission reception points (TRPs), etc.) in communication with a number of central units (CUs) (e.g., central nodes (CNs), access node controllers (ANCs), etc.), where a set of one or more DUs, in communication with a CU, may define an access node (e.g., which may be referred to as a BS, 5G NB, next generation NodeB (gNB or gNodeB), transmission reception point (TRP), etc.). A BS or DU may communicate with a set of UEs on downlink channels (e.g., for transmissions from a BS or DU to a UE) and uplink channels (e.g., for transmissions from a UE to BS or DU). These multiple access technologies have been adopted in various telecommunication standards to provide a common protocol that enables different wireless devices to communicate on a municipal, national, regional, and even global level. NR (e.g., new radio or 5G) is an example of an emerging telecommunication standard. NR is a set of enhancements to the LTE mobile standard promulgated by 3GPP. NR is designed to better support mobile broadband Internet access by improving spectral efficiency, lowering costs, improving services, making use of new spectrum, and better integrating with other open standards using OFDMA with a cyclic prefix (CP) on the downlink (DL) and on the uplink (UL). To these ends, NR supports beamforming, multiple-input multiple-output (MIMO) antenna technology, and carrier aggregation. US 2018/331714 discloses a wireless device comprising: at least one transceiver configured to transmit and receive multiple signals; a housing comprising a first end area and a second end area, the housing containing the at least one transceiver; multiple antennas with at least one of the multiple antennas disposed in the first end area and at least one other of the multiple antennas disposed in the second end area; at least one antenna diversity switch communicatively coupled to the at least one transceiver and the multiples antennas, the at least one antenna diversity switch configured to controllably establish conductive paths between the at least one transceiver and the multiple antennas to route a signal to a selected one of: any of at least two of the multiple antennas disposed at the first end area of the housing and at least two other antennas disposed at the second end area of the housing; and a controller communicatively coupled to the at least one antenna diversity switch and configured to cause the at least one antenna diversity switch to establish the conductive paths between the at least one transceiver and the multiple antennas. US 2005/148306 discloses a station that includes a radio receiver, a switchbox and several antennas. The switchbox allows any antenna to be used either as a transmit antenna or as a receive antenna. The radio receiver includes a predictive antenna selection process. The predictive antenna selection process predicts the best antenna (for both receiving and transmitting signals) based on the signal quality of the antenna for prio