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Control signal aggregation in a multi-carrier WCDMA system

A carrier signal and control channel technology, applied in transmission systems, signal channels, digital transmission systems, etc., can solve problems such as system instability and uncontrollable system heat gain

Active Publication Date: 2012-09-12
TELEFON AB LM ERICSSON (PUBL)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, such actions can cause system instability as the system's rise in heat (RoT) metric can become uncontrollable

Method used

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  • Control signal aggregation in a multi-carrier WCDMA system
  • Control signal aggregation in a multi-carrier WCDMA system
  • Control signal aggregation in a multi-carrier WCDMA system

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Embodiment Construction

[0029] Aspects of the invention are described below in the context of the Multi-Carrier HSPA specification currently being developed by 3GPP. Of course, those skilled in the art will recognize that the techniques described herein are not limited to application in these particular systems, and are applicable to other wireless systems, whether developed or planned.

[0030] As discussed above, achieving very high packet data rates in a wireless link generally requires that the power level of the high speed data channel received at the remote node needs to be very high. However, control channel data is conventionally transmitted on the same carrier as the high-speed data channel but on one or more separate (eg, separated by channelization codes) low-rate physical channels. The high power levels required for high speed data channels can cause significant interference to these important control channels. As mentioned, one possible response to this problem is simply to increase the...

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Abstract

Methods and apparatus are disclosed for transmitting data to a remote node via each of two or mote transmitted earner signals, wherein a distinct outbound packet data traffic channel is mapped to each transmitted carrier signal. In an exemplary method, aggregated control channel data is formed by combining control channel data corresponding to each of two or more received carrier signals, simultaneously transmitting traffic channel data to the remote node on each of the two o or more outbound packet data traffic channels, and transmitting the aggregated control channel data using one or more physical control channels mapped to a first one of the transmitted carrier signals. In particular, these methods and apparatus may be applied to a multi-carrier High-Speed Packet Access (HSPA) system.

Description

technical field [0001] The present invention relates generally to wireless communication systems and, more particularly, to techniques for efficiently communicating control channel information in multicarrier high speed wireless data systems. Background technique [0002] Multi-Carrier (MC) High Speed ​​Packet Access (HSPA) is currently standardized by the 3rd Generation Partnership Project (3GPP). In the so-called Release 8 specification of 3GPP, downlink packet communication using two adjacent HSPA carriers is supported. In the uplink, currently only single carrier transmission is possible, but there is a 3GPP work item aiming to include in Release 9 communication using two adjacent uplink HSPA carriers. In this work item, the intention is for the carrier to operate as a legacy carrier to the greatest extent possible. Future 3GPP releases can be expected to evolve MC-HSPA in various ways, including supporting more than 2 carriers and operation in different frequency band...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L5/00
CPCH04B1/707H04L1/0027H04L1/0029H04L5/001H04L5/0053H04L5/0055H04L5/06H04W72/20H04L1/001H04L5/0016
Inventor S.格兰特A.瓦伦王怡彬
Owner TELEFON AB LM ERICSSON (PUBL)
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