Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Transmission method for physical downlink control channel

A physical downlink control and control channel technology, applied in wireless communication, multi-frequency code systems, electrical components, etc., can solve the problems of limited number of UEs, limited control channel transmission capacity, affecting MU-MIMO and CoMP performance gains, etc. The effect of increasing capacity

Active Publication Date: 2013-02-13
POTEVIO INFORMATION TECH
View PDF8 Cites 20 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the prior art, the number of UEs that can be carried by CRS-based PDCCH is limited, which seriously affects the performance gain of MU-MIMO and CoMP
At the same time, in the heterogeneous scenario, the PDCCH demodulated based on CRS is strongly interfered (for example, the low-power micro cell (RRH / Pico cell) is interfered by the macro cell), which requires eNB to use a higher number of CCEs to transmit PDCCH, which further limits The transmission capability of the control channel

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
  • Transmission method for physical downlink control channel
  • Transmission method for physical downlink control channel
  • Transmission method for physical downlink control channel

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0021] The core idea of ​​the technical solution of the present invention is to design a "Control Channel Indication Field" (CCIF) for indicating the control information of the UE. The CCIF contains a small amount of indication information. / 9 / 10 UEs have the same number of CCEs to ensure backward compatibility; at the same time, the control channel indicator field is only placed in the UE-specific search space, which reduces the number of blind detections, reduces the complexity of the UE, and saves energy consumption. The physical downlink of the UE The content domain information of the control channel is carried on the original PDSCH, which significantly improves the capacity of the PDCCH carried by the subframe. The transmission strategy based on the demodulation of the demodulation reference signal DMRS (Demodulation Reference Signal) is used, that is, the scheme of introducing D-PDCCH (through DMRS based -RS demodulation PDCCH), compared with the PDCCH scheme based on CRS...

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 provides a transmission method for a physical downlink control channel (PDCCH). The transmission method comprises the following steps that: (A) a network side sets a control channel indicator field (CCIF) for indicating the control information of user equipment (UE), and bears the contents of the PDCCH on an orthogonal frequency division multiplexing symbol of a physical downlink shared channel (PDSCH); and (B) the UE decodes the CCIF, determines the modulation mode and position of the control information, and acquires the contents of the PDCCH from the PDSCH according to the position. According to the scheme, the PDCCH bearing capacity of a sub-frame can be remarkably improved.

Description

technical field [0001] The present invention relates to the technical field of wireless communication, in particular to a method for sending a physical downlink control channel. Background technique [0002] The channel structure of LTE Release 8 / 9 / 10 is as follows figure 1 shown. In LTE Release 8 / 9 / 10, the Physical Downlink Control Channel (PDCCH) occupies 1-3 Orthogonal Frequency Division Multiplexing (OFDM) symbols. 4 resource elements (REs) form a REG, wherein the Physical Control Format Indicator Channel (PCFICH) occupies 4 REGs, the Physical Hybrid Automatic Repeat Request Indicator Channel (PHICH) occupies 6-39 REGs, and each control channel element ( CCE) consists of 9 REGs, excluding the REs occupied by the cell-specific reference signal (CRS, Cell-specific Reference Signal) port and the REGs occupied by PCFICH and PHICH, the maximum number of CCEs provided for 10M bandwidth is 42(2Tx) / 37( 4Tx), some of these CCEs are reserved for purposes such as power control a...

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
IPC IPC(8): H04L27/26H04W72/12
Inventor 鲁智陈哲池连刚吴联海
Owner POTEVIO INFORMATION TECH
Features
  • Generate Ideas
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com