CN-122029786-A - Downlink pilot signal compression

Abstract

A method is disclosed that includes receiving a configuration from a radio access network node for downlink pilot signal compression, compressing one or more downlink pilot signals received from the radio access network node based on the configuration, and transmitting information related to the one or more compressed downlink pilot signals to the radio access network node.

Inventors

• S. Rezai
• O-e. barb
• K.S.J. La Du

Assignees

• 诺基亚技术有限公司

Dates

Publication Date

20260512

Application Date

20240816

Priority Date

20231012

Claims (20)

1. 1. An apparatus comprising at least one processor and at least one memory storing instructions that, when executed by the at least one processor, cause the apparatus to at least: Receiving a configuration for downlink pilot signal compression from a radio access network node; Compressing one or more downlink pilot signals received from the radio access network node based on the configuration, and Information relating to one or more compressed downlink pilot signals is transmitted to the radio access network node.
2. 2. The apparatus of claim 1, further caused to: Transmitting capability information to the radio access network node, the capability information indicating at least a capability for supporting the downlink pilot signal compression, Wherein the configuration is received based on transmitting the capability information.
3. 3. The apparatus of any of the preceding claims, further caused to: The one or more downlink pilot signals are preprocessed according to one or more preprocessing functions indicated by the radio access network node prior to the compressing.
4. 4. The apparatus of any of the preceding claims, wherein the compression is performed using at least one quantizer, wherein the quantizer comprises a scalar quantizer or a vector quantizer.
5. 5. The apparatus of claim 4, further caused to: receiving a configuration for the quantizer from the radio access network node, wherein the configuration for the quantizer indicates at least one of: Grouping techniques for a set of resource elements of the one or more downlink pilot signals, or A quantization codebook for quantizing the set of resource elements of the one or more downlink pilot signals.
6. 6. The apparatus according to any one of claims 4 to 5, wherein said compression is performed by using an encoder and said quantizer, Wherein the encoder is configured to reduce the dimensionality of the one or more downlink pilot signals, an Wherein the quantizer is used for further compression of the one or more downlink pilot signals.
7. 7. The apparatus of claim 6, wherein the encoder is trained to compress the one or more downlink pilot signals.
8. 8. The apparatus of any of the preceding claims, further caused to: receiving an uplink pilot signal pattern from the radio access network node, the uplink pilot signal pattern being used for coordination between the one or more downlink pilot signals and one or more uplink pilot signals, and The one or more uplink pilot signals are transmitted to the radio access network node according to the uplink pilot signal pattern.
9. 9. An apparatus comprising at least one processor and at least one memory storing instructions that, when executed by the at least one processor, cause the apparatus to at least: Transmitting a configuration for downlink pilot signal compression to a user equipment; receiving information from the user equipment relating to one or more compressed downlink pilot signals; constructing one or more downlink pilot signals based on the information, and A downlink channel estimation is performed based at least on the one or more constructed downlink pilot signals.
10. 10. The apparatus of claim 9, further caused to: Receiving capability information from the user equipment, the capability information indicating at least a capability for supporting the downlink pilot signal compression, and The configuration is determined based on the capability information.
11. 11. The apparatus according to any of claims 9 to 10, wherein the constructing is performed by using at least one dequantizer, wherein the dequantizer comprises a scalar dequantizer or a vector dequantizer.
12. 12. The device of claim 11, wherein the constructing is performed by using the dequantizer and decoder.
13. 13. The apparatus according to any of claims 9 to 12, wherein the downlink channel estimation is performed using a non-machine learning based algorithm.
14. 14. The apparatus according to any of claims 9 to 12, wherein the downlink channel estimation is performed using a machine learning algorithm.
15. 15. The apparatus according to any of claims 9 to 14, wherein the downlink channel estimation is further performed based on at least one of one or more uplink pilot signals received from the user equipment, or an uplink channel correlation function.
16. 16. The apparatus of claim 15, further caused to: an uplink pilot signal pattern is transmitted to the user equipment, the uplink pilot signal pattern being used to coordinate between the one or more downlink pilot signals and the one or more uplink pilot signals.
17. 17. The apparatus of any of claims 15 to 16, further caused to: performance of at least one of an encoder for compressing the one or more downlink pilot signals, or a decoder for constructing the one or more downlink pilot signals, is monitored based on the one or more downlink pilot signals and the one or more uplink pilot signals.
18. 18. A method, comprising: Receiving a configuration for downlink pilot signal compression from a radio access network node; Compressing one or more downlink pilot signals received from the radio access network node based on the configuration, and Information relating to one or more compressed downlink pilot signals is transmitted to the radio access network node.
19. 19. A method, comprising: Transmitting a configuration for downlink pilot signal compression to a user equipment; receiving information from the user equipment relating to one or more compressed downlink pilot signals; constructing one or more downlink pilot signals based on the information, and A downlink channel estimation is performed based at least on the one or more constructed downlink pilot signals.
20. 20. A non-transitory computer readable medium comprising program instructions that, when executed by an apparatus, cause the apparatus to at least: Receiving a configuration for downlink pilot signal compression from a radio access network node; Compressing one or more downlink pilot signals received from the radio access network node based on the configuration, and Information relating to one or more compressed downlink pilot signals is transmitted to the radio access network node.

Description

Downlink pilot signal compression Technical Field The following example embodiments relate to wireless communications. Background A pilot (pilot) signal is a known data sequence transmitted within a communication system that may be used to facilitate estimation of Channel State Information (CSI). Disclosure of Invention The scope of protection sought for the various example embodiments is set forth in the independent claims. Example embodiments and features (if any) described in this specification that do not fall within the scope of the independent claims are to be construed as examples useful for understanding the various embodiments. According to an aspect, there is provided an apparatus comprising at least one processor and at least one memory storing instructions that, when executed by the at least one processor, cause the apparatus at least to receive a configuration for downlink pilot signal compression from a radio access network node, compress one or more downlink pilot signals received from the radio access network node based on the configuration, and send information relating to the one or more compressed downlink pilot signals to the radio access network node. According to another aspect, there is provided an apparatus comprising means for receiving a configuration for downlink pilot signal compression from a radio access network node, means for compressing one or more downlink pilot signals received from the radio access network node based on the configuration, and means for transmitting information relating to the one or more compressed downlink pilot signals to the radio access network node. According to another aspect, a method is provided comprising receiving a configuration for downlink pilot signal compression from a radio access network node, compressing one or more downlink pilot signals received from the radio access network node based on the configuration, and transmitting information related to the one or more compressed downlink pilot signals to the radio access network node. According to another aspect, there is provided a computer program comprising instructions which, when executed by an apparatus, cause the apparatus at least to receive a configuration for downlink pilot signal compression from a radio access network node, compress one or more downlink pilot signals received from the radio access network node based on the configuration, and send information relating to the one or more compressed downlink pilot signals to the radio access network node. According to another aspect, there is provided a computer readable medium comprising program instructions which, when executed by an apparatus, cause the apparatus at least to receive a configuration for downlink pilot signal compression from a radio access network node, compress one or more downlink pilot signals received from the radio access network node based on the configuration, and send information relating to the one or more compressed downlink pilot signals to the radio access network node. According to another aspect, there is provided a non-transitory computer readable medium comprising program instructions which, when executed by an apparatus, cause the apparatus at least to receive a configuration for downlink pilot signal compression from a radio access network node, compress one or more downlink pilot signals received from the radio access network node based on the configuration, and send information related to the one or more compressed downlink pilot signals to the radio access network node. According to another aspect, there is provided an apparatus comprising at least one processor and at least one memory storing instructions that, when executed by the at least one processor, cause the apparatus at least to transmit a configuration for downlink pilot signal compression to a user equipment, receive information related to one or more compressed downlink pilot signals from the user equipment, construct one or more downlink pilot signals based on the information, and perform downlink channel estimation based at least on the one or more constructed downlink pilot signals. According to another aspect, there is provided an apparatus comprising means for transmitting to a user equipment a configuration for downlink pilot signal compression, means for receiving information from the user equipment related to one or more compressed downlink pilot signals, means for constructing one or more downlink pilot signals based on the information, and means for performing downlink channel estimation based at least on the one or more constructed downlink pilot signals. According to another aspect, a method is provided that includes transmitting a configuration for downlink pilot signal compression to a user equipment, receiving information from the user equipment regarding one or more compressed downlink pilot signals, constructing one or more downlink pilot signals based on the information, and performing downlink channel estimation