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Collision avoidance between downlink control channel and aperiodic channel state information-reference signal

A channel state information, aperiodic technology, applied in the directions of transmission path sub-channel allocation, pilot signal allocation, transmission path separation device, etc., can solve problems such as complicated wireless device processing

Active Publication Date: 2022-03-29
TELEFON AB LM ERICSSON (PUBL)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This complicates the wireless device processing as it is generally desirable to indicate to the wireless device which ZP CSI-RS configuration it uses for rate matching on all channels including EPDCCH and PDSCH

Method used

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  • Collision avoidance between downlink control channel and aperiodic channel state information-reference signal
  • Collision avoidance between downlink control channel and aperiodic channel state information-reference signal
  • Collision avoidance between downlink control channel and aperiodic channel state information-reference signal

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0160] One solution to resolve conflicts between EPDCCH REs and REs belonging to aperiodic CSI-RS transmissions is to have the wireless device assume that no aperiodic CSI-RS, if the wireless device receives an EPDCCH message in the EPDCCH set in the subframe indicating that aperiodic CSI-RS has been transmitted. If the PDCCH indicates the presence of aperiodic CSI-RS transmission in a subframe, and the wireless device does not receive an EPDCCH message in an EPDCCH set, then the wireless device is allowed to assume that aperiodic CSI-RS is transmitted in subframes in PRBs belonging to that EPDCCH set. RS. It should be noted that these rules only apply if the wireless device is configured to receive aperiodic CSI-RS without a subframe configuration associated with it (i.e., these rules do not apply transmitting wireless device). exist Figure 15 An example of this embodiment is shown in . exist Figure 16 The steps associated with this example are illustrated in .

[016...

Embodiment 2

[0166] A second solution to resolve conflicts between EPDCCH REs and REs belonging to aperiodic CSI-RS transmission is to have the wireless device assume that no aperiodic CSI-RS is transmitted to the wireless device in subframes in the PRB carrying the EPDCCH message , if the wireless device receives an EPDCCH message indicating that an aperiodic CSI-RS has been transmitted in a subframe. If the PDCCH indicates the presence of aperiodic CSI-RS transmission in the subframe and the wireless device 16 does not receive the EPDCCH message, then the wireless device 16 is allowed to assume that aperiodic CSI is transmitted in subframes in PRBs belonging to the EPDCCH set configured for the WD -RS. It should be noted that these rules only apply if the wireless device 16 is configured to receive aperiodic CSI-RS without a subframe configuration associated with it (i.e., these rules do not apply transmitting wireless device). exist Figure 18 An example of this embodiment is shown i...

Embodiment 3

[0170] A third solution to resolve conflicts between EPDCCH REs and REs belonging to aperiodic CSI-RS transmissions is to have the wireless device assume that no aperiodic CSI-RS transmissions are made to the wireless device 16 in a subframe in any RE carrying an EPDCCH message. CSI-RS, if the wireless device 16 receives the EPDCCH message in the subframe. For example, if Figure 7 REs with index 0 shown in , carry EPDCCH messages, the wireless device 16 assumes that no aperiodic CSI-RS is transmitted in these REs. If the PDCCH indicates that there is aperiodic CSI-RS transmission in the subframe, and the wireless device 16 does not receive the EPDCCH message, then the wireless device 16 is allowed to assume that aperiodic CSI-RS transmission can be transmitted in the subframe in all REs belonging to the EPDCCH set configured for the WD sex CSI-RS. It should be noted that these rules only apply if the wireless device 16 is configured to receive aperiodic CSI-RS without a sub...

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Abstract

A method, wireless apparatus and network node for avoiding collisions between a downlink control channel and an aperiodic channel state information reference signal (aperiodic CSI‑RS) are provided. According to some aspects, there is provided a method comprising: receiving an aperiodic channel state information reference signal based on the assumption that there is no aperiodic CSI‑RS in physical layer resources corresponding to a set of downlink control channels— – Aperiodic CSI‑RS.

Description

technical field [0001] The present disclosure relates to methods for configuring an aperiodic Channel State Information Reference Signal (CSI-RS), and in particular, for avoiding communication between a downlink control channel and an aperiodic Channel State Information Reference Signal (CSI-RS). Conflicting methods, network nodes, wireless devices, computer programs and computer program products thereof. Background technique [0002] Long Term Evolution (LTE) uses Orthogonal Frequency Division Multiplexing (OFDM) in the downlink, and uses Discrete Fourier Transform (DFT) to spread OFDM in the uplink. The basic LTE downlink physical resources can thus be viewed as figure 1 The time-frequency grid illustrated in , where each resource element corresponds to one OFDM subcarrier during one OFDM symbol interval. [3GPP TS 36.211 Technical Specification Group Radio Access Network; Evolved Universal Terrestrial Radio Access (E-UTRA); Physical Channels and Modulation (Release 13); ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L5/00
CPCH04L5/0007H04L5/005H04L5/0089H04L5/0094H04L5/0048H04W72/0446H04W74/0816H04W72/23
Inventor M.芙瑞尼R.M.哈里森F.姆尼尔S.姆鲁加纳桑高世伟
Owner TELEFON AB LM ERICSSON (PUBL)