Unlock instant, AI-driven research and patent intelligence for your innovation.

User equipment (UE) and method for detecting physical downlink control channel (PDCCH)

A number and base station technology, applied in the field of UE and PDCCH detection, can solve the problems of PDSCH reception error, increase of UE cost, increase of UE processing capacity, etc., and achieve the effect of improving performance, reducing error rate, and reducing development cost

Active Publication Date: 2013-07-24
DATANG MOBILE COMM EQUIP CO LTD
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, in extreme cases, that is, the base station side uses a CCE length of 1 (or 8) to transmit data on the PDCCH, and the UE side starts detection from a CCE length of 8 (or 1), it is correct to detect the data transmitted by the PDCCH The maximum number of cycles required is N=4C, which increases the requirements for UE processing capabilities, which leads to increased UE costs and may cause corresponding PDSCH reception errors

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • User equipment (UE) and method for detecting physical downlink control channel (PDCCH)
  • User equipment (UE) and method for detecting physical downlink control channel (PDCCH)
  • User equipment (UE) and method for detecting physical downlink control channel (PDCCH)

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0034] The UE and the method for detecting the PDCCH, the base station and the method for transmitting data on the PDCCH provided by the present invention will be described in more detail below with reference to the drawings and embodiments.

[0035] According to the 3GPP 36.211 protocol, the UE will periodically use the PUCCH (Physical Uplink Control Channel, Physical Uplink Control Channel) channel to feed back the downlink CQI (Channel Quality Indicator, Channel Quality Indicator) value to the base station. Satisfaction with the channel. The applicant found that when the CQI is relatively high, the UE has a relatively strong ability to receive downlink signals. In this case, using a smaller number of CCEs, for example, the number of CCEs is 1, can ensure that the UE can correctly detect The data transmitted on the PDCCH; when the CQI value is relatively low, the ability of the UE to receive downlink signals is relatively poor. In this case, it is necessary to use a large num...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses user equipment (UE) and a method for detecting a physical downlink control channel (PDCCH). The method comprises the following steps of: acquiring a channel quality indicator (CQI) value reported last time when the detection on the PDCCH is confirmed to be triggered; determining the quantity of control channel elements (CCE) mapped by the CQI value reported last time according to a mapping relation between the CQI value predetermined with a base station and the quantity of the CCEs which are on the PDCCH and used for data transmission; and detecting data transmitted onthe PDDCH according to the determined quantity of the CCEs. By the method, the detection time of the PDCCH reaches a theoretical minimum value and the hardware complexity of the UE is reduced, so that the development cost of the UE is lowered, the error rate of detection on a physical downlink shared channel (PDSCH) by the UE is reduced, and the performance of a UE receiver is enhanced.

Description

technical field [0001] The present invention relates to the technical field of wireless communication, in particular to a UE and a method for detecting a PDCCH. Background technique [0002] In the LTE (Long Term Evolution, long-term evolution) system, PDCCH (Physical Downlink Control Channel, physical downlink control channel) is used to transmit uplink and downlink scheduling control information, and determine PUSCH (Physical Uplink Shared Channel, physical uplink shared channel) and PDSCH (Physical Downlink Shared Channel, physical downlink shared channel) resource allocation, frequency hopping type, transmission mode and other control information. [0003] In order to better adapt the PDCCH transmission of the UE (User Equipment, user equipment) to the channel conditions of the UE, the PDCCH transmission of the UE supports 4 kinds of PDCCH formats, and the CCE (Control Channel Element, control channel element) supported by the 4 kinds of PDCCH formats The length (that i...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): H04W24/02H04W24/10
Inventor 卜天
Owner DATANG MOBILE COMM EQUIP CO LTD