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Downlink information sending and receiving method and device

A technology for receiving and controlling information, which is applied in the field of intelligent transportation, can solve problems such as sTTI that cannot support new granularity, and achieve the effect of ensuring delay communication requirements

Active Publication Date: 2022-08-02
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The present invention provides a downlink information sending and receiving method and device to at least solve the problem that the downlink information processing method in the related art cannot support the new granularity sTTI

Method used

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  • Downlink information sending and receiving method and device
  • Downlink information sending and receiving method and device
  • Downlink information sending and receiving method and device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0125] The base station schedules the sPDSCH through two levels of DCI. The first-level DCI indicates that the sTTI band has a fixed sTTI length / pattern, and different sTTI bands independently determine their own sTTI length / pattern. The first-level DCI is located in the LegacyPDCCH, or the first sTTI.

[0126] Figure 11 It is a schematic diagram of independently determining the sTTI length in different sTTI bands according to an embodiment of the present invention and the same sTTI length in the same sTTI band, such as Figure 11 As shown, different sTTI bands are used for terminal groups or service groups with different delay requirements, and the sTTI length in the same sTTI band is unique. Figure 11 Taking the subframe containing two sTTI bands as an example, the sTTI lengths in different sTTI bands are independently determined, and there is only one sTTI length in the same sTTI band. The specific signaling content is that the first-level DCI indicates sTTI band, and ...

Embodiment 2

[0156] The base station schedules the sPDSCH through two levels of DCI. The first level indicates the minimum sTTI length in this subframe, and the second level indicates the sTTI length. The first-level DCI is located in the Legacy PDCCH, or in the first sTTI.

[0157] Detecting sPDCCH needs to know the minimum sTTI length, so that the dynamic sTTI length is notified in the second stage, at least the possible detection OFDM symbol positions can be known, not necessarily every OFDM symbol. Simultaneous multiple sTTI bands are still optional. Figure 12 It is a schematic diagram of the two-level DCI of the present invention determining that the sTTI length in the sTTI band is a variable value, such as Figure 12 As shown, taking the subframe containing 2 sTTI bands as an example, the sTTI lengths in different sTTI bands are independently determined, with the sTTI with the smallest granularity indicated by the first level, and the variable length of the sTTI indicated by the s...

Embodiment 3

[0178] The base station schedules the sPDSCH through a single DCI.

[0179] sTTI band determination methods include:

[0180] Method A: sTTI band is configured by SIB or RRC (semi-static variable).

[0181] Specifically, it includes: (1) SIB is configured with one sTTI band; (2) SIB is configured with multiple sTTI bands, and the sTTI band where the UE is located is displayed (RRC) or implicitly (UE ID / RNTI) determined. (3) RRC configures the sTTI band where the UE is located.

[0182] Method B: sTTI band is configured like CFI. (variable at subframe level)

[0183] sTTI length determination method:

[0184] Method 1: sTTI length is configured by SIB or RRC (semi-static variable). Specifically, it includes: (1) SIB configures one sTTI length; (2) (optionally, SIB configures multiple sTTI length sets,) RRC configures specific sTTI length according to different sTTI bands, that is, {sTTI band, sTTI can be configured in combination length}, which can also be configured indi...

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Abstract

The present invention discloses a method and device for sending and receiving downlink information, wherein the method includes: determining one or more search spaces including one or more physical downlink control channels sPDCCH for receiving downlink control information, wherein the The search space includes at least one of the following resources: part of the resources in the subframe, part of the resources in the short transmission time interval sTTI, part of the resources in the orthogonal frequency division multiplexing OFDM symbol; the one or more determined search spaces include The downlink control information is received on the one or more sPDCCHs, which solves the problem that the downlink information processing method in the related art cannot support sTTI of new granularity, and guarantees the delay communication requirement.

Description

technical field [0001] The present invention relates to the technical field of intelligent transportation, and in particular, to a method and device for sending and receiving downlink information. Background technique [0002] With the 4th Generation mobile communication technology (the 4th Generation mobile communication technology, referred to as 4G) Long-Term Evolution (Long-Term Evolution, referred to as LTE) / Advanced Long-Term Evolution (Long-Term Evolution Advance, referred to as LTE-Advance / LTE- A) The commercialization of the system is becoming more and more perfect, and the technical index requirements for the next generation mobile communication technology, namely the 5th Generation mobile communication technology (5G for short) are also getting higher and higher. It is generally believed in the industry that the next-generation mobile communication system should have the characteristics of ultra-high speed, ultra-high capacity, ultra-high reliability, and ultra-...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L27/26
CPCH04L27/2601H04L27/26H04W72/04
Inventor 石靖夏树强戴博张雯任敏韩祥辉
Owner ZTE CORP