CN-122029787-A - Techniques for rank-aware interference suppression based on neighbor cell layer notification

Abstract

Methods, systems, and devices for wireless communications are described. The user equipment may send a message to the serving network entity requesting the number of transmission layers scheduled for communication within the communication resource by one or more neighboring network entities. In response, the user equipment may receive an indication of a number of transmission layers scheduled for use by one or more neighboring network entities for communication within the communication resource from the serving network entity. The user equipment may apply the number of transmission layers for the communication resources to a rank-aware interference suppression algorithm and may use the rank-aware interference suppression algorithm to improve the noise covariance matrix estimation. The improved noise covariance matrix estimate may be used to mitigate interference at the communication resources when receiving a downlink message from a serving network entity via the communication resources.

Inventors

• Y. Stan
• R. Shepard
• A. Regev
• MOSES ALAN

Assignees

• 高通股份有限公司

Dates

Publication Date

20260512

Application Date

20240917

Priority Date

20231103

Claims (20)

1. 1. A User Equipment (UE), the UE comprising: One or more of the memories may be provided, the one or more memories store processor executable code; and One or more processors coupled with the one or more memories and operable, individually or collectively, to execute the code to cause the UE to: transmitting, to a first network entity serving the UE, a first message comprising a request for a number of transmission layers scheduled for communication within a communication resource by one or more neighboring network entities; receiving an indication of the number of transmission layers for the communication resource from the first network entity, and A downlink message is received via the communication resource using a rank-aware channel estimation algorithm corresponding to the number of transmission layers for the communication resource.
2. 2. The UE of claim 1, wherein the first message is sent based at least in part on a noise covariance matrix estimate for the communication resource meeting an interference threshold.
3. 3. The UE of claim 2, wherein the one or more processors are further operable individually or collectively to execute the code to cause the UE to: control information including an indication to perform the noise covariance matrix estimation within the communication resources is received from the first network entity.
4. 4. The UE of claim 1, wherein: The first message includes an indication of a granularity associated with the number of transmission layers, and The granularity includes a number of transmission layers per resource element, a number of transmission layers per resource block, a number of transmission layers per slot, or a number of transmission layers per subcarrier.
5. 5. The UE of claim 1, wherein the indication of the number of transmission layers comprises a sum of the number of transmission layers associated with the one or more neighboring network entities.
6. 6. The UE of claim 1, wherein: the indication of the number of transmission layers for the communication resource is received via control signaling, and The control signaling also includes a scheduling grant allocating the communication resource to the UE.
7. 7. The UE of claim 1, wherein: the first message is sent via a first medium access control-control element (MAC-CE) or a Physical Uplink Control Channel (PUCCH), and The indication of the number of transmission layers for the communication resource is received via a second medium access control-control element (MAC-CE) or a Physical Downlink Control Channel (PDCCH).
8. 8. A first network entity, the first network entity comprising: One or more of the memories may be provided, the one or more memories store processor executable code; and One or more processors coupled with the one or more memories and operable, individually or collectively, to execute the code to cause the first network entity to: receiving a first message from a User Equipment (UE) served by the first network entity comprising a request for a number of transmission layers scheduled for communication within a communication resource by one or more neighboring network entities; Transmitting a second message comprising a request for the number of transmission layers for the communication resource to a second network entity; Receiving a third message from the second network entity comprising an indication of the number of transmission layers for the communication resource, and The indication of the number of transmission layers for the communication resource is sent to the UE.
9. 9. The first network entity of claim 8, wherein: The first message includes an indication of a granularity associated with the number of transmission layers, and The granularity includes a number of transmission layers per resource element, a number of transmission layers per resource block, a number of transmission layers per slot, or a number of transmission layers per subcarrier.
10. 10. The first network entity of claim 9, wherein the indication of the number of transmission layers is based at least in part on the granularity.
11. 11. The first network entity of claim 8, wherein the one or more processors are further operable individually or collectively to execute the code to cause the first network entity to: Control information including an indication to perform noise covariance matrix estimation on the communication resources is transmitted to the UE.
12. 12. The first network entity of claim 8, wherein: the indication of the number of transmission layers for the communication resource is transmitted to the UE via control signaling, and The control signaling also includes a scheduling grant allocating the communication resource to the UE.
13. 13. The first network entity of claim 8, wherein the first network entity comprises a serving gndeb (gNB) serving the UE, the one or more neighboring network entities comprise one or more interferers gnbs, and the second network entity comprises a core network entity serving multiple gnbs, the multiple gnbs comprising the serving gNB and the one or more interferers gnbs.
14. 14. The first network entity of claim 8, wherein the first message includes information indicating an estimated geographic location of the UE.
15. 15. The first network entity of claim 8, wherein: The first message is received via a first medium access control-control element (MAC-CE) or a Physical Uplink Control Channel (PUCCH), and The indication of the number of transmission layers for the communication resource is transmitted via a second medium access control-control element (MAC-CE) or a Physical Downlink Control Channel (PDCCH).
16. 16. A second network entity, the second network entity comprising: One or more of the memories may be provided, the one or more memories store processor executable code; and One or more processors coupled with the one or more memories and operable, individually or collectively, to execute the code to cause the second network entity to: Receiving a message from a first network entity comprising a request for a number of transmission layers scheduled for communication within a communication resource by one or more neighboring network entities; requesting from at least one of the one or more neighboring network entities a number of transmission layers scheduled for use by the at least one neighboring network entity for communication within the communication resource, and An indication of the number of transmission layers scheduled for use by the at least one neighboring network entity for communication within the communication resource is transmitted to the first network entity.
17. 17. The second network entity of claim 16, wherein the message comprises information indicating an estimated geographic location of a User Equipment (UE) served by the first network entity.
18. 18. The second network entity of claim 16, wherein the one or more processors are further operable individually or collectively to execute the code to cause the second network entity to: The one or more neighboring network entities are identified based on a determination of one or more candidate network entities having a likelihood of interfering with the first network entity.
19. 19. The second network entity of claim 18, wherein the determination of the one or more candidate network entities is based at least in part on an estimated geographic location of a UE requesting the number of transmission layers.
20. 20. The second network entity of claim 16, wherein the first network entity comprises a serving gnnb (gNB) that serves UEs requesting the number of transmission layers, the one or more neighboring network entities comprise one or more interferers gnbs, and the second network entity comprises a core network entity that serves multiple gnbs, the multiple gnbs comprising the serving gNB and the one or more interferers gnbs.

Description

Techniques for rank-aware interference suppression based on neighbor cell layer notification Cross reference This patent application claims the benefit of U.S. patent application Ser. No. 18/501,829, entitled "TECHNIQUES FOR RANK-AWARE INTERFERENCE REJECTION BASED ON NEIGHBOR CELL LAYER NOTICA (technique for rank-aware interference suppression based on neighbor cell layer NOTIFICATION)" filed by EISTEIN et al at month 11 of 2023, which is assigned to the assignee of the present application and expressly incorporated herein by reference. Technical Field The following relates to wireless communications, including techniques for rank-aware interference suppression based on neighbor cell layer notification. Background Wireless communication systems are widely deployed to provide various types of communication content such as voice, video, packet data, messaging, broadcast, and so on. These systems may be able to support communication with multiple users by sharing the available system resources (e.g., time, frequency, and power). Examples of such multiple access systems include fourth generation (4G) systems, such as Long Term Evolution (LTE) systems, LTE-advanced (LTE-a) systems, or LTE-a Pro systems, and fifth generation (5G) systems, which may be referred to as New Radio (NR) systems. These systems may employ techniques such as Code Division Multiple Access (CDMA), time Division Multiple Access (TDMA), frequency Division Multiple Access (FDMA), orthogonal FDMA (OFDMA), or discrete fourier transform spread orthogonal frequency division multiplexing (DFT-S-OFDM). A wireless multiple-access communication system may include one or more base stations, each supporting wireless communication for communication devices, which may be referred to as User Equipment (UEs). In some cases, to avoid interference between downlink transmissions from the same base station, the base station may allocate unique resources to each of the UEs served by the base station. However, in some cases, a base station may allocate resources to its users, which resources are also allocated to users served by another base station within the wireless communication system. In such cases, different base stations may simultaneously use the same resources for downlink communications, resulting in potential interference of downlink signals at one or more of the UEs. Disclosure of Invention The described technology relates to improved methods, systems, devices, and apparatuses supporting techniques for rank-aware interference suppression based on neighbor cell layer notification. According to various aspects, the described techniques may provide for determining, by a UE, whether an interference level within a communication resource, such as a resource for downlink communication from a serving network entity (e.g., a base station), meets an interference threshold. Based on determining that the interference level meets the interference threshold, the UE may send a message to the serving network entity requesting a notification of the number of transmission layers scheduled for communication within the communication resource by one or more neighboring network entities. The serving network may deliver the request from the UE to the core network entity, and the core network entity may identify one or more network entities that are potential sources of interference to the serving network entity (such as one or more network entities that are proximate to the serving network entity or requesting the UE, or a combination thereof) as one or more neighboring network entities. The core network entity may request each of the neighboring network entities to inform the core network entity of the number of transmission layers scheduled for use by the neighboring network entity for communication within the communication resource. One or more of the neighboring network entities may inform the core network entity of the number of transmission layers scheduled for use by the neighboring network entity for communication within the communication resource. The core network entity may receive one or more responses from the one or more identified neighboring network entities and may aggregate (e.g., sum) the indicated number of transmit layers scheduled for communication within the communication resource. The core network entity may send an indication of the number of aggregated transmission layers scheduled for communication within the communication resources by the one or more identified neighboring network entities to the serving network entity, and the serving network entity may send the indication to the UE. To mitigate interference from one or more identified neighboring network entities, the UE may apply an aggregated number of transmission layers scheduled for communication within the communication resources by the one or more identified neighboring network entities to a rank-aware channel estimation algorithm, and may then use the updated rank-aware channel estimati