Multiplexing scheme for unicast and broadcast/multicast traffic

a multi-schema and traffic technology, applied in the field of wireless communication, can solve the problems of large path loss, relatively high frame error level in transmissions, and limited application of the above-mentioned techniques to transmitting data blocks for unicast traffi

Inactive Publication Date: 2006-02-23
LUCENT TECH INC
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Problems solved by technology

However, application of the above-mentioned techniques has been limited to transmitting data blocks for unicast traffic, i.e. a data block addressed to a single mobile station.
Due to errors in channel quality estimates, a relatively high level of frame errors may occur in the transmissions performed at a given rate (transport format).
The interlace-based multiplexing approach used in the prior art poses problems when different broadcast data rates are used by different base stations in different cells in the system.
The larger cell

Method used

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  • Multiplexing scheme for unicast and broadcast/multicast traffic

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Embodiment Construction

[0026] Illustrative embodiments of the invention are described below. In the interest of clarity, not all features of an actual implementation are described in this specification. It will of course be appreciated that in the development of any such actual embodiment, numerous implementation-specific decisions may be made to achieve the developers' specific goals, such as compliance with system-related and business-related constraints, which may vary from one implementation to another. Moreover, it will be appreciated that such a development effort might be complex and time-consuming, but would nevertheless be a routine undertaking for those of ordinary skill in the art having the benefit of this disclosure.

[0027] The present invention presents a new multiplexing scheme for unicast and broadcast traffic. Generally, the multiplexing scheme of the instant invention overcomes the scheduling restrictions in the prior art to allow use of HARQ transmissions and retransmissions of unicast ...

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Abstract

A method is provided for efficiently multiplexing interlaced broadcast traffic over a wireless network. The multiplexing scheme organizes unused slots in at least some base stations so that unicast traffic employing hybrid ARQ may be delivered therein.

Description

BACKGROUND OF THE INVENTION [0001] 1. Field of the Invention [0002] This invention relates generally to telecommunications, and more particularly, to wireless communications. [0003] 2. Description of the Related Art [0004] In the field of wireless data systems, a number of well-known standards, such as 1x-EV-DO, 1xEV-DV as well as the High Speed Downlink Packet Access (HSDPA) specification in the Universal Mobile Telecommunication System (UMTS) standard, have been employed. Newer technologies such as fast scheduling, adaptive modulation and coding (AMC) and hybrid ARQ (HARQ) have also been introduced to improve overall system capacity. However, application of the above-mentioned techniques has been limited to transmitting data blocks for unicast traffic, i.e. a data block addressed to a single mobile station. In general, a scheduler selects a user for transmission at a given time and adaptive modulation and coding is used to select an appropriate transport format (modulation and cod...

Claims

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Application Information

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IPC IPC(8): H04J3/24
CPCH04L1/0065H04L1/0066H04W72/005H04L1/1816H04L1/0083H04W72/30H04L1/18H04W4/06
Inventor KHAN, FAROOQ ULLAH
Owner LUCENT TECH INC
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