EP-4742580-A2 - DYNAMIC RECEIVER CHAIN ALLOCATION

Abstract

A method for wireless communication by a user equipment (UE) includes receiving, from a network node, a message configuring a group of component carriers (CCs). The method also includes allocating, to each CC of the group of CCs based on receiving the message configuring the group of CCs, one of a respective first number of receiver chains, from a group of receiver chains available at the UE, or a respective second number of receiver chains, from the group of receiver chains, to maximize a total number of receiver chains for decoding the group of CCs, collectively. The method further includes decoding each CC of the group of CCs based on the respective first number of receiver chains or the respective second number of receiver chains allocated to the CC.

Inventors

• CHOI, ZAE YONG
• ANG, PETER PUI LOK
• HE, RUHUA
• PATHAK, Yash
• YU, YUANNING
• PELUR SUKUMAR, Chitaranjan

Assignees

• QUALCOMM Incorporated

Dates

Publication Date

20260513

Application Date

20231012

Claims (15)

1. A method (800) for wireless communication by a user equipment, UE, comprising: detecting (802) an event associated with a wireless communication channel; allocating (804), to each component carrier, CC, of a group of CCs based on detecting the event, one of a respective first number of receiver chains, from a group of receiver chains available at the UE, or a respective second number of receiver chains, from the group of receiver chains, to maximize a total throughput for decoding the group of CCs collectively; and decoding (802) each CC of the group of CCs based on the respective first amount of receiver chains or the respective second amount of receiver chains allocated to the CC.
2. The method of claim 1, wherein each receiver chain in the group of receiver chains is a hard-wired receiver chain or a time-shared digital processing receiver chains.
3. The method of claim 1, wherein each receiver chain in the group of receiver chains includes one or more of an antenna, a radio frequency, RF,/analog amplifier, a mixer, an RF/analog filter, an analog-to-digital convertor, ADC, a down converter, a digital processor, or a digital demodulator.
4. The method of claim 1, further comprising determining, for each CC of the group of CCs, a respective first set of throughputs associated with decoding the CCs using the respective first number of receiver chains and a respective second set of throughputs associated with decoding the CCs using the respective second number of receiver chains, wherein both the respective first set of throughputs and the respective second set of throughputs are based on one or both of a current amount of network traffic or current channel conditions.
5. The method of claim 4, wherein the current amount of network traffic is based on one or both of a modulation and coding scheme or a number of modulation symbols.
6. The method of claim 4, wherein the current channel conditions are based on one or both of a signal-to-noise ratio or a reference signal measurement.
7. A method (900) for wireless communication by a user equipment, UE, comprising: detecting (902) an event associated with a wireless communication channel; allocating (904), in response to detecting the event, a respective first number of receiver chains from a group of receiver chains available at the UE to each component carrier, CC, of a first subset of CCs, of a group of CCs, currently associated with a respective second number of receiver chains from the group of receiver chains, and a respective second number of receiver chains from the group of receiver chains to each CC of a second subset of CCs, of the group of CCs, currently associated with a respective first number of receiver chains from the group of receiver chains, based on and a throughput gain associated with switching each CC of the first subset of CCs to the respective first number of receiver chains being greater than a throughput loss associated with switching each CC of the second subset of CCs to the respective second number of receiver chains; and decoding (906) each CC of the group of CCs based on the respective first number of receiver chains or the respective second number of receiver chains allocated to the CC.
8. The method of claim 7, wherein each receiver chain in the group of receiver chains is a hard-wired receiver chain or a time-shared digital processing receiver chains.
9. The method of claim 7, wherein each receiver chain in the group of receiver chains includes one or more of an antenna, a radio frequency, RF,/analog amplifier, a mixer, an RF/analog filter, an analog-to-digital convertor, ADC, a down converter, a digital processor, or a digital demodulator.
10. The method of claim 7, further comprising: determining, for each CC in the first subset of CCs, a first throughput associated with decoding the CC using the respective first number of receiver chains; and determining, for each CC in the first subset of CCs, a second throughput associated with decoding the CC using the respective second number of receiver chains, wherein the throughput gain is based on a difference between a sum of the respective first throughputs and a sum of the respective second throughputs.
11. The method of claim 10, further comprising: determining, for each CC in the second subset of CCs, a third throughput associated with decoding the CC using the respective first number of receiver chains; and determining, for each CC in the second subset of CCs, a fourth throughput associated with decoding the CC using the respective second number of receiver chains, wherein the throughput loss is based on a difference between a sum of the respective third throughputs and a sum of the respective fourth throughputs.
12. The method of claim 11, wherein each one of the respective first throughputs, respective second throughputs, respective third throughputs, and respective fourth throughputs is based on one or both of a current amount of network traffic or current channel conditions.
13. The method of claim 12, wherein the current amount of network traffic is based on one or both of a modulation and coding scheme or slot allocation.
14. The method of claim 12, wherein the current channel conditions are based on one or both of a signal-to-noise ratio or a reference signal measurement.
15. The method of claim 7, wherein the event is a change in a traffic pattern on the wireless communication channel and/or a change in channel condition of the wireless communication channel.

Description

CROSS-REFERENCE TO RELATED APPLICATION The present application claims priority to U.S. Patent Application No. 18/074,365, filed on December 2, 2022, and titled "DYNAMIC RECEIVER CHAIN ALLOCATION," the disclosure of which is expressly incorporated by reference in its entirety. FIELD OF THE DISCLOSURE The present disclosure relates generally to wireless communications, and more specifically to dynamically allocating receiver chains available at a wireless communication device. BACKGROUND Wireless communications systems are widely deployed to provide various telecommunications services such as telephony, video, data, messaging, and broadcasts. Typical wireless communications systems may employ multiple-access technologies capable of supporting communications with multiple users by sharing available system resources (for example, bandwidth, transmit power, or the like). Examples of such multiple-access technologies include 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, time division synchronous code division multiple access (TD-SCDMA) systems, and long term evolution (LTE). LTE/LTE-Advanced is a set of enhancements to the universal mobile telecommunications system (UMTS) mobile standard promulgated by the Third Generation Partnership Project (3GPP). Narrowband (NB)-Internet of things (IoT) and enhanced machine-type communications (eMTC) are a set of enhancements to LTE for machine type communications. A wireless communications network may include a number of base stations (BSs) that can support communications for a number of user equipment (UEs). A user equipment (UE) may communicate with a base station (BS) via the downlink and uplink. The downlink (or forward link) refers to the communication link from the BS to the UE, and the uplink (or reverse link) refers to the communication link from the UE to the BS. As will be described in more detail, a BS may be referred to as a Node B, an evolved Node B (eNB), a gNB, an access point (AP), a radio head, a transmit and receive point (TRP), a new radio (NR) BS, a 5G Node B, or a 6G Node B. The above multiple access technologies have been adopted in various telecommunications standards to provide a common protocol that enables different user equipment to communicate on a municipal, national, regional, and even global level. New radio (NR), which may also be referred to as 5G, is a set of enhancements to the LTE mobile standard promulgated by the Third Generation Partnership Project (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 orthogonal frequency division multiplexing (OFDM) with a cyclic prefix (CP) (CP-OFDM) on the downlink (DL), using CP-OFDM or SC-FDM (for example, also known as discrete Fourier transform spread OFDM (DFT-s-OFDM)) on the uplink (UL), as well as supporting beamforming, multiple-input multiple-output (MIMO) antenna technology, and carrier aggregation. A UE may include a group of receiver chains for receiving communications via one or more communication bands. In some examples, a UE may decode a group of component carriers (CCs) configured in one or more of the communication bands. In some such examples, based on availability of radio frequency (RF) resources and demodulation capabilities (for example, an analog-to-digital converter (ADC) sampling rate and a decoding sampling rate), a UE may not be able to use a maximum number of receiver chains supported by the UE to decode each CC of the group of CCs. SUMMARY In one aspect of the present disclosure, a method for wireless communication includes receiving, from a network node, a message configuring a group of component carriers (CCs). The method further includes allocating, to each CC of the group of CCs based on receiving the message configuring the group of CCs, one of a respective first number of receiver chains, from a group of receiver chains available at the UE, or a respective second number of receiver chains, from the group of receiver chains, to maximize a total number of receiver chains actively used for decoding the group of CCs, collectively. The method still further includes decoding each CC of the group of CCs based on the respective first number of receiver chains or the respective second number of receiver chains allocated to the CC. Another aspect of the present disclosure is directed to an apparatus including means for receiving, from a network node, a message configuring a group of CCs. The apparatus further includes means for allocating, to each CC of the group of CCs based on receiving the message configuring the group of CCs, one of a respective first number of receiver chains,