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Method and apparatus of monitoring pdcch in wireless communication system

a wireless communication system and control channel technology, applied in the field of wireless communication, can solve the problems of significant increase in blind decoding complexity and difficulty in allocating wide bandwidth frequencies, and achieve the effect of effective monitoring of a physical downlink control channel and improving overall system performan

Inactive Publication Date: 2011-06-16
LG ELECTRONICS INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The present invention provides a method and apparatus for effectively transmitting and monitoring a control channel in a wireless communication system supporting multi-carrier. This is achieved by receiving a map of the control channel from the base station and monitoring a set of control channel candidates based on the map. This approach reduces complexity of blind decoding and allows for efficient use of available resources. The technical effect is to improve the efficiency and reliability of wireless communication systems in multi-carrier systems.

Problems solved by technology

However, except for some areas of the world, it is difficult to allocate frequencies of wide bandwidths.
However, if a BS transmits a control channel and a UE monitors the control channel with a same manner used in a single carrier system in a multi-carrier system, the complexity of blind decoding is significantly increased.

Method used

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  • Method and apparatus of monitoring pdcch in wireless communication system

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Embodiment Construction

[0045]FIG. 1 is a block diagram showing a wireless communication system.

[0046]Referring to FIG. 1, a wireless communication system 10 includes at least one base station (BS) 11. The BSs 11 provide communication services to specific geographical regions (generally referred to as cells) 15a, 15b, and 15c. The cell can be divided into a plurality of regions (referred to as sectors). A user equipment (UE) 12 may be fixed or mobile, and may be referred to as another terminology, such as a mobile station (MS), a user terminal (UT), a subscriber station (SS), a wireless device, a personal digital assistant (PDA), a wireless modem, a handheld device, etc. The BS 11 is generally a fixed station that communicates with the UE 12 and may be referred to as another terminology, such as an evolved node-B (eNB), a base transceiver system (BTS), an access point, etc.

[0047]Hereinafter, a downlink (DL) denotes communication from the BS to the UE, and an uplink (UL) denotes communication from the UE to...

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Abstract

A method and an apparatus of monitoring a physical downlink control channel (PDCCH) in a wireless communication system, carried in a user equipment (UE), are provided. The method includes receiving a PDCCH map, and monitoring a set of PDCCH candidates based on the PDCCH map.

Description

TECHNICAL FIELD[0001]The present invention relates to wireless communications, and more particularly, to a method and an apparatus of monitoring a physical downlink control channel (PDCCH) in a wireless communication system.BACKGROUND ART[0002]In wireless communication systems, one base station (BS) generally provides services to a plurality of user equipments (UEs). The BS schedules user data for the plurality of UEs, and transmits the user data together with control information containing scheduling information for the user data. In general, a channel for carrying the control information is referred to as a control channel, and a channel for carrying the user data is referred to as a data channel. The UE finds control information of the UE by searching for the control channel, and processes data of the UE by using the control information.[0003]In order for the UE to receive user data assigned to the UE, control information for the user data on a control channel must be received. I...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): H04B7/24
CPCH04L1/0038H04L5/001H04L27/2613H04L5/0094H04L23/02H04L5/0053H04L1/0026H04L1/0031H04L1/1861H04L5/0057H04L5/0055
Inventor LEE, MOON ILHAN, SEUNG HEEKO, HYUN SOOCHUNG, JAE HOONKIM, SO YEON
Owner LG ELECTRONICS INC
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