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JP-2026514294-A - Multiburst TRS measurement settings

JP2026514294AJP 2026514294 AJP2026514294 AJP 2026514294AJP-2026514294-A

Abstract

Methods, systems, and apparatus are disclosed. According to some embodiments, a network node is configured to configure a radio device to perform a time-domain channel property (TDCP) measurement based on a first tracking reference signal (TRS) burst and a second TRS burst, to cause the transmission of a first TRS burst and a second TRS burst, wherein the first TRS burst is one of aperiodic and periodic, and the second TRS burst is one of aperiodic and periodic, and to receive configuration and instructions for a TDCP measurement based on the first TRS burst and the second TRS burst. [Selection Diagram] Figure 17

Inventors

  • エルンストレーム， ペール
  • ムルガナタン， シヴァ
  • アスリー， フレードリク
  • チャン， チエンウェイ

Assignees

  • テレフオンアクチーボラゲット エルエム エリクソン（パブル）

Dates

Publication Date
20260508
Application Date
20240207
Priority Date
20230207

Claims (20)

  1. A method implemented by a wireless device (22; 22a, 22b), wherein the method is Receiving settings for performing time-domain channel property (TDCP) measurements based on a first tracking reference signal (TRS) burst and a second TRS burst (S140), Receiving the first TRS burst and the second TRS burst (S142), wherein the first TRS burst is one of aperiodic and periodic, and the second TRS burst is one of aperiodic and periodic, A method comprising performing the TDCP measurement based on the above settings and the first TRS burst and the second TRS burst (S144).
  2. The method according to claim 1, wherein the TDCP measurement is set for the lag of the number of slots based on the first TRS burst and the second TRS burst.
  3. The method according to claim 2, wherein the number of slots is set by wireless resource control signaling.
  4. The first TRS burst has periodicity of P slots and slot offset of S slots, The second TRS burst has periodicity of N*P slots and slot offset of S+L slots, The TDCP measurement is a non-periodic TDCP measurement set up with periodic Q*P for the lag of L slots based on the first TRS burst and the second TRS burst. The method according to claim 1.
  5. The first TRS burst has periodicity of P slots and slot offset of S slots, The second TRS burst has a periodicity of Q*P slots and a slot offset of S+L slots, The TDCP measurement described above is set for the lags of L slots. The method according to claim 1.
  6. The method according to claim 5, wherein the trigger for the aperiodic TDCP measurement is the next opportunity of the second TRS burst.
  7. The first TRS burst is periodic, The second TRS burst is aperiodic, The TDCP measurement is a non-periodic TDCP measurement set for the lag of L slots. The method according to claim 1.
  8. The method according to claim 7, wherein the trigger for the TDCP measurement is a TRS burst separated by L slots for a given occasion of the first TRS burst.
  9. The first TRS burst and the second TRS burst are aperiodic, The TDCP measurement is a non-periodic TDCP measurement set for the lag of L slots. The method according to claim 1.
  10. The method according to claim 9, wherein the trigger for aperiodic TDCP measurement is two TRS bursts separated by L slots.
  11. The method according to any one of claims 1 to 10, wherein the first TRS burst and the second TRS burst are assumed to be transmitted from the same antenna port.
  12. The method according to any one of claims 1 to 11, wherein the resources of the first TRS burst and the resources of the second TRS burst are assumed to be pseudo-collocated.
  13. The method according to any one of claims 1 to 11, wherein the resources of the first TRS burst and the resources of the second TRS burst have the same time domain index and the same subcarrier index.
  14. The method according to any one of claims 1 to 13, wherein the first TRS burst and the second TRS burst are configured as part of different non-zero power (NZP) channel state information-reference signal (CSI-RS) resource sets.
  15. The method according to any one of claims 1 to 13, wherein the first TRS burst and the second TRS burst are configured as part of the same NZP CSI-RS resource set.
  16. A method implemented by network nodes (16; 16a, 16b, 16c), wherein the method is Setting the wireless device (22; 22a, 22b) to perform time-domain channel property (TDCP) measurements based on a first tracking reference signal (TRS) burst and a second TRS burst (S134), The transmission of the first TRS burst and the second TRS burst (S136), wherein the first TRS burst is one of aperiodic and periodic, and the second TRS burst is one of aperiodic and periodic, A method comprising receiving the above-mentioned settings and instructions for the TDCP measurement based on the first TRS burst and the second TRS burst (S138).
  17. The method according to claim 16, wherein the TDCP measurement is set for the lag of the number of slots based on the first TRS burst and the second TRS burst.
  18. The method according to claim 17, wherein the number of slots is set by wireless resource control signaling.
  19. The first TRS burst has periodicity of P slots and slot offset of S slots, The second TRS burst has periodicity of N*P slots and slot offset of S+L slots, The TDCP measurement is a non-periodic TDCP measurement set up with periodic Q*P for the lag of L slots based on the first TRS burst and the second TRS burst. The method according to claim 16.
  20. The first TRS burst has periodicity of P slots and slot offset of S slots, The second TRS burst has a periodicity of Q*P slots and a slot offset of S+L slots, The TDCP measurement described above is set for the lags of L slots. The method according to claim 16.

Description

This disclosure relates to wireless communication, and more particularly to multiburst tracking reference signal (TRS) TRS measurement settings. The Third Generation Partnership Project (3GPP) is developing and is developing standards for fourth-generation (4G) wireless communication systems (also known as Long Term Evolution (LTE)) and fifth-generation (5G) wireless communication systems (also known as New Radio (NR)). Such systems will provide, among other features, broadband communication between network nodes such as base stations and mobile radio devices (WDs), as well as communication between network nodes and between WDs. 3GPP is also developing standards for sixth-generation (6G) wireless communication networks. Multi-user, multi-input, multi-output (MU-MIMO) In MU-MIMO, two or more users (e.g., wireless devices) within the same cell are jointly scheduled on the same time-frequency resource (one or more). That is, two or more independent data streams are transmitted simultaneously to different wireless devices, and spatial domains can commonly be used to isolate each stream. Transmitting several streams simultaneously can increase the system's capacity. However, this comes at the cost of reducing the signal-to-interference plus noise ratio (SINR) per stream, as power must be shared between streams and the streams can interfere with each other. Channel Status Information Reference Signal (CSI-RS) In CSI measurement and feedback, CSI-RS is defined. CSI-RS is transmitted on each antenna port and used by wireless devices to measure the downlink channel between each transmitting antenna port and each receiving antenna port. The transmitting antenna port is also called the CSI-RS port. The number of antenna ports supported in NR is {1, 2, 4, 8, 12, 16, 24, 32}. By measuring the received CSI-RS, wireless devices can estimate the channel that the CSI-RS is traversing, including the radio propagation channel and antenna gain. CSI-RS for the above purpose is also called non-zero power (NZP) CSI-RS. CSI-RS can be configured to transmit within several resource elements (REs) in a slot and within several slots. Figure 1 shows an example of CSI-RS REs for 12 antenna ports, with one RE per resource block (RB) per port. Furthermore, interference measurement resources (IMR) for wireless devices to measure interference are also defined in the NR. An IMR resource includes either four REs, i.e., four adjacent REs at the same frequency in the same OFDM symbol, or a 2x2 array of adjacent REs in both time and frequency within a slot. By measuring both the channel based on NZP CSI-RS and the interference based on IMR, wireless devices can estimate the effective channel and noise plus interference for determining the CSI, i.e., rank, precoding matrix, and channel quality. Furthermore, wireless devices in NR may be configured to measure interference based on one or more NZP CSI-RS resources. Tracking Reference Signal (TRS) Oscillator defects can cause transmission and reception to be out of sync in time and/or frequency, which can lead to inter-symbol and intra-symbol interference. NR introduced a tracking reference signal (TRS) that can be used by wireless devices for fine-grained time/frequency synchronization. In the NR 3GPP specification, TRS may be set when no CSI reporting setting is configured, or when the higher-layer parameter "reportQuantity" in the CSI-ReportConfig information element (IE) associated with all reporting settings linked to a CSI-RS resource set containing (one or more) TRS is set to "none". This means that CSI reporting based on measurements of TRS is not supported in NR. The TRS is configured via "trs-info" in the NZP-CSI-RS-ResourceSet information element (IE) of 3GPP Technical Specification (TS) 38.331 related to a CSI-RS resource set, and for that CSI-RS resource set, a wireless device can assume that the antenna ports with the same port index as the configured NZP CSI-RS resources in the resource set are the same. From the perspective of the 3GPP specification, the TRS is designated as a special type of NZP CSI-RS where the corresponding NZP CSI-RS resource set containing (one or more) TRS has a truly set upper-layer parameter "trs-info". TRS is not actually a CSI-RS, but rather a resource set consisting of multiple periodic NZP CSI-RSs. More specifically, TRS consists of four 1-port, density 3 CSI-RSs located within two consecutive slots. The CSI-RSs within the resource set can be set to a periodicity of 10, 20, 40, or 80 ms. Note that the exact set of REs used for the TRS CSI-RSs may vary. There can be a 4-symbol time domain separation between two CSI-RSs within a slot. Figure 2 shows an example of a TRS burst of two TRS symbols in two adjacent slots. NR also supports aperiodic TRS. In LTE, the Cell-Specific Reference Signal (CRS) served the same purpose as the TRS, as the LTE CRS could be used for synchronization, but it could also be used for CSI reporting, which is not supported for the TR