A method and base station for realizing channel transmission

A channel transmission and base station technology, applied in the field of channel transmission, can solve problems such as occupancy, affecting system work quality, and timing relationship

Active Publication Date: 2020-11-24
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the LTE system supports low-cost MTC UEs and coverage-enhanced MTC UEs to use cross-subframe scheduling. However, in the LTE system, the multicast / multicast single frequency network (MBSFN) subframe for transmitting multicast / broadcast services will occupy the entire system bandwidth. However, low-cost MTC UEs and coverage-enhanced MTC UEs are not sure about MBSFN, so they will affect the timing relationship between downlink control channels and downlink traffic channels; Frames will affect the repeated transmission of different physical downlink channels, affecting the quality of system work
[0007] To sum up, whether it is an MTC UE of a narrowband system or an MTC UE with enhanced coverage, the existing downlink channel transmission method cannot guarantee the timing relationship between the downlink control channel and the downlink traffic channel, which affects the normal communication and system work quality of the MTC terminal.

Method used

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  • A method and base station for realizing channel transmission
  • A method and base station for realizing channel transmission
  • A method and base station for realizing channel transmission

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0369] In this embodiment, the ePDCCH is used as the downlink control channel, and the PDSCH is used as the downlink service channel for description:

[0370] There are three types of subframe sets used by the base station to send the ePDCCH: the first type, the MBSFN subframe; the second type, the subframe set configured through high-layer signaling; the third type, all available subframes.

[0371] Corresponding to the subframe set used by the terminal to receive and detect the ePDCCH, there are three cases. The first is to detect the MBSFN subframe; the second is to detect the subframe set configured by high-level signaling; the third is to detect in all available subframes.

[0372] On the base station side, the ePDCCH schedules the PDSCH through cross-subframes; where the cross-subframe scheduling interval is k, specifically, the time of the subframe used to send the ePDCCH is n, and the time of the subframe used to send the PDSCH is n+k.

[0373] The base station indicat...

Embodiment 2

[0382] In this embodiment, the ePDCCH is used as the downlink control channel, and the PDSCH is used as the downlink service channel for description, mainly describing the situation of cross-subframe scheduling of repeated transmission when the coverage is enhanced.

[0383] There are three types of subframe sets used by the base station to send the repeatedly transmitted ePDCCH, the first type is non-MBSFN subframes; the second type is the subframe set configured through high-layer signaling; the third type is all available subframes. There are three types of subframes for detecting ePDCCH when the corresponding terminal receives: the first type, receiving and detecting in non-MBSFN subframes; the second type, receiving and detecting in the subframe set configured by high-level signaling; the third type, receiving and detecting in all subframes Receive detection. If there is an intersection between the subframe set in the subframe set configured by high-level signaling and th...

Embodiment 3

[0395] This embodiment describes in detail the transmission of downlink control channels and downlink traffic channels using the method provided by the present invention.

[0396] The base station first sends an MTC-specific system indication message for the MTC UE, and notifies the MTC terminal of the MBSFN subframe set in the cell and the subframe set for actually transmitting the PMCH channel through the system indication message.

[0397] When the MTC UE transmits downlink service information, since the MTC UE can only receive one narrowband resource in the same subframe and the downlink control channel occupies an independent narrowband resource, the base station schedules the PDSCH of the low-cost MTC UE across subframes through the ePDCCH. Service information is carried on the PDSCH.

[0398] At this time, because the cross-subframe scheduling interval k is a predefined fixed value; if k=1, the terminal blindly detects and receives the ePDCCH on the narrowband resource ...

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Abstract

The present invention discloses a method and device for realizing channel transmission, including: a base station determines a subframe set used by a downlink control channel and / or a subframe set used by a downlink traffic channel; and the base station schedules a downlink traffic channel across subframes through the downlink control channel . In the method of the present invention, after the base station determines the subframe set used by the downlink control channel and / or the subframe set used by the downlink traffic channel, the downlink traffic channel is scheduled across the subframes through the downlink control channel, thereby avoiding the need for narrowband systems and coverage enhancement systems. The timing relationship of channel transmission is affected because the multicast / multicast single frequency network (MBSFN) subframe for transmitting multicast / broadcast services will occupy the entire system bandwidth, which ensures the timing relationship between the base station and the terminal, makes the MTC terminal communicate normally, and improves the quality of the system.

Description

technical field [0001] The invention relates to the field of wireless communication, in particular to a method and a base station for realizing channel transmission. Background technique [0002] The existing long-term evolution (LTE, Long-Term Evolution) or advanced long-term evolution system (LTE-A or LTE-Advance, Long-Term Evolution Advance) is based on the dynamic scheduling of each subframe for control channel transmission, that is, each subframe Both can transmit different control channels. figure 1 It is a schematic diagram of a frame structure of control channel transmission in a frequency division duplex (FDD, Frequency Division Duplexing) mode in the prior art. Such as figure 1 As shown, a 10ms wireless frame consists of twenty slots (slots) with a length of 0.5ms and numbered 0 to 19, and slots 2i and 2i+1 form subframes (subframe) i, i with a length of 1ms is 0 or a natural number. figure 2 It is a schematic diagram of the frame structure of the control chan...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L5/00H04W72/04
CPCH04L5/003H04L5/0091H04W72/0446H04W72/23H04L5/0044H04L5/0053H04L5/0064H04L5/0092H04L5/0012H04W4/70H04W72/30H04W72/12H04W88/08
Inventor 石靖夏树强戴博陈宪明张雯刘锟方惠英
Owner ZTE CORP
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