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Downlink resource granularity determination method, device and system

A determination method and resource granule technology, applied in the field of communication, can solve problems such as LTE service occupation bandwidth conflicts

Inactive Publication Date: 2018-04-06
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Embodiments of the present invention provide a method, device, and system for determining downlink resource granularity, so as to at least solve the problem of conflict between low-latency transmission and bandwidth occupied by LTE services in the related art

Method used

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  • Downlink resource granularity determination method, device and system
  • Downlink resource granularity determination method, device and system
  • Downlink resource granularity determination method, device and system

Examples

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Embodiment 1

[0170] The method steps described in this application document may be run in a long-term evolution LTE system, and the network architecture of the network may include network-side equipment (eg, a base station) and a terminal. This embodiment provides a method for determining the granularity of downlink resources that can run on the foregoing network architecture. It should be noted that the operating environment of the foregoing information transmission method provided in this embodiment of the present application is not limited to the foregoing network architecture.

[0171] figure 1 It is the flow of a method for determining downlink resource granularity according to an embodiment of the present invention Figure 1 ,like figure 1 shown, including the following steps:

[0172] Step S102, the base station configures a set containing x PRBs, wherein some or all of the resources in the set containing x PRBs are used to send the second downlink control channel and the second d...

specific Embodiment 1

[0224] The base station sends downlink control information containing DL sTTI band resource allocation in the first physical downlink control channel PDCCH, and the DL sTTI band uses the type 0 / 1 / 2 resource allocation method in the LTE system or other methods, but the resource granularity used is The frequency domain size of the control channel element sCCE of the second physical downlink control channel sPDCCH. Here, sCCE=3PRB and limited to one OFDM symbol are taken as an example. The base station sequentially sends multiple second physical downlink control channels sPDCCHs in the candidate set, wherein the downlink control information carried by the sPDCCHs includes resource allocation information of the second physical downlink data channels.

[0225] image 3 is a schematic diagram when x is an integer multiple of the frequency domain size of the second downlink control channel resource unit according to the first embodiment of the present invention Figure 1 ,like im...

specific Embodiment 2

[0232] The base station sends downlink control information containing DL sTTI band resource allocation in the first physical downlink control channel PDCCH, and the DL sTTI band uses the type 0 / 1 / 2 resource allocation method in the LTE system or other methods, but the resource granularity used is An integer multiple of the least common divisor of the first downlink data channel resource allocation granularity and the frequency domain size of the second downlink control channel resource unit; or an integer multiple of an ERBG (enhanced resource block group), where the ERBG is M times the RBG, and M is the number of PRBs included in the second downlink control channel resource element sCCE. Here, sCCE=3PRB and limited to one OFDM symbol are taken as an example. The base station sequentially sends multiple second physical downlink control channels sPDCCHs in the candidate set, wherein the downlink control information carried by the sPDCCHs includes resource allocation information...

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Abstract

The invention provides a downlink resource granularity determination method, device and system. The method comprises the following steps: a base station configures a set comprising x physical resourceblocks (PRBs), wherein part or all resources in the set comprising the x PRBs are used for sending of a second downlink control channel and a second downlink data channel, and x is a positive integer; and the base station sends configuration information used for configuration of the set through high layer signaling or physical layer signaling carried by a first downlink control channel. The downlink resource granularity determination method, device and system adopting the technical scheme has the advantages that the problem of bandwidth occupation conflicts between low-delay transmission andLTE businesses in the relevant art is solved, so that low-delay businesses and the traditional LTE businesses can efficiently use downlink resources in a system bandwidth without resource waste or conflicts, DL sTTI band internal resource allocation expenses can be reduced, and the purpose of reasonable coexistence of the low-delay businesses and the traditional LTE businesses can be further achieved.

Description

technical field [0001] The present invention relates to the field of communications, and in particular, to a method, device and system for determining downlink resource granularity. Background technique [0002] In the LTE system, a transmission time interval (Transmission Time Interval, TTI for short) of 1 ms is adopted, that is, a 1 ms subframe. In the existing LTE system, TTI bundling is introduced when considering uplink coverage enhancement, and multiple TTIs are bundled together to transmit one data block, that is, the transmission time interval is increased. At present, the 3rd Generation Partnership Project (3GPP for short) has organized a research on reducing the transmission time interval, so as to reduce the user plane time and the control plane delay. [0003] There are currently two methods for reducing TTI. One is to reduce the duration of a single OFDM symbol by expanding the subcarrier spacing of the Orthogonal Frequency Division Multiplexing (OFDM) system. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W72/04H04W72/14H04L5/00
CPCH04L5/0007H04W72/0453H04W72/23H04L5/00H04W72/04
Inventor 石靖夏树强张雯韩祥辉梁春丽任敏张文峰
Owner ZTE CORP
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