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AssigneesSamsung Electronics Co., Ltd., Industry-Academic Cooperation Foundation, Yonsei University
InventorsJin-Ghoo Choi, Sung-Soo Hwang, Sang-Boh Yun, Kyung-Ho Sohn, Young-Yong Kim, Chung-Ha Koh
Estimating the term…
A method for receiving multicast service data by a terminal in a communication system. The method includes receiving a pilot from a base station, measuring channel state information using the received pilot, and transmitting the channel state information to the base station; receiving a frame from the base station, and determining whether there is an error in the received frame; when no error has occurred in the received frame, determining whether the number of frames consecutively received without error is greater than or equal to a predetermined number; and when the number of frames consecutively received without error is greater than or equal to the predetermined number, transitioning to a non-feedback state where the terminal transmits no channel state information to the base station. The frame includes multicast service data.
A method for receiving multicast service data by a terminal in a communication system, the method comprising:
A method for transmitting a multicast service signal by a base station in a communication system, the method comprising:
An apparatus for receiving multicast service data in a communication system, the apparatus comprising:
An apparatus for transmitting a multicast service signal in a communication system, the apparatus comprising:
Dependencies are inferred from the claim text.
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From the US filing history. Foreign family members aren’t listed.
Flow control between communication endpoints: using signalling between network elements
Characterised by the signalling: transmission of channel quality indication
Characterised by the signalling: scheduling of signalling, e.g. occurrence thereof
Local resource management: resource management for broadcast services
About 1 year 10 months of term left · ends 6 Sep 2028 (estimated)
This application claims the benefit under 35 U.S.C. §119(a) of a Korean Patent Application filed in the Korean Intellectual Property Office on Apr. 4, 2007 and assigned Serial No. 2007-33502, the disclosure of which is incorporated herein by reference.
The present invention relates generally to a method and apparatus for transmitting and receiving data in a communication system, and in particular, to a method and apparatus for reducing Channel Quality Information (CQI) feedback during data transmission/reception for multicast services.
Generally, multicast service transmits corresponding data by adjusting modulation and coding rate to the user having the lowest channel gain among the users in order to allow all users in a corresponding multicast user group to normally receive the multicast service.
For a more complete understanding of the present disclosure and its advantages, reference is now made to the following description taken in conjunction with the accompanying drawings, in which like reference numerals represent like parts:
FIG. 1 is a CQI feedback signaling diagram for a multicast service according to a preferred embodiment of the present invention;
FIG. 2 is a diagram illustrating a frame structure between a terminal and a base station according to a first embodiment of the present invention;
FIGS. 1 through 9, discussed below, and the various embodiments used to describe the principles of the present disclosure in this patent document are by way of illustration only and should not be construed in any way to limit the scope of the disclosure. Those skilled in the art will understand that the principles of the present disclosure may be implemented in any suitably arranged communication system.
The present invention provides a method and apparatus for efficiently using uplink resources by reducing the number of CQI feedbacks by a terminal in a communication system supporting multicast services.
Specifically, each terminal, desiring to use multicast service, transitions to a state for reducing feedback to a base station, while maintaining QoS constraint, i.e., Frame Error Rate (FER). In addition, the present invention provides a fast-request/fast-recovery method and a non-feedback count option in order to reduce the feedback that the terminal transmits to the base station.