SDMA for WCDMA with increased capacity by use of multiple scrambling codes

A code and scrambling technology, applied in the field of wireless communication, can solve the problems of scheduling constraints and transmission capacity constraints, affecting the rate prediction of base stations, and reducing network throughput.

Inactive Publication Date: 2008-09-10
QUALCOMM INC
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

For example, the above changes may affect base station scheduling, power control, and/or rate prediction for one or more mobile terminals
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  • SDMA for WCDMA with increased capacity by use of multiple scrambling codes
  • SDMA for WCDMA with increased capacity by use of multiple scrambling codes
  • SDMA for WCDMA with increased capacity by use of multiple scrambling codes

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Embodiment Construction

[0028] Various embodiments will now be described with reference to the drawings, wherein like reference numerals are used to refer to like elements throughout. In the following description, for purposes of explanation, numerous specific details are set forth in order to provide a thorough understanding of one or more embodiments. It may be evident, however, that the described embodiments may be practiced without these specific details. In other instances, well-known structures and devices are shown in block diagram form in order to facilitate illustrating one or more embodiments.

[0029] As used in this application, the terms "component," "system," and similar terms are intended to refer to a computer-related entity, either hardware, a combination of hardware and software, software, or software in execution. For example, a component can be, but is not limited to being, a process running on a processor, a processor, an object, an executable, a thread of execution, a program, ...

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Abstract

Systems and methodologies are described that facilitate increasing system capacity in a code-limited WCDMA (e.g., TDD, FDD, ) wireless communication environment. According to one aspect, a larger code space can be defined by introducing multiple code clusters within a sector, wherein each cluster has a unique scrambling code. Codes within a cluster can have orthogonal Walsh sequences that can be assigned to user devices to facilitate communicating over a wireless network and can overlap with codes in another cluster. The unique scrambling code assigned to each cluster can ensure that duplicate Walsh sequences in another cluster in the same sector appear as a pseudo-noise codes.

Description

[0001] In 35 U.S.C.? 19 claims of priority [0002] This application claims priority over Provisional Application No. 60 / 702,018, filed July 22, 2005, entitled "SDMA for WCDMA," and provisional application No. 60 / 702,018, filed August 9, 2005, also entitled "SDMA for WCDMA" 60 / 708,230, assigned to the assignee herein and expressly incorporated herein by reference. technical field [0003] The following description relates to wireless communications in general, and system capacity in a WCDMA wireless communications environment in particular. Background technique [0004] Wireless networking systems have become a popular means by which most people communicate throughout the world. To meet consumer demands and to improve portability and convenience, wireless communication devices have become smaller and more powerful. The increase in processing power of mobile devices, such as cellular telephones, has resulted in increased demands on wireless network transmission systems. ...

Claims

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Application Information

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IPC IPC(8): H04J13/00H04J11/00H04B1/707H04J13/18
CPCH04J13/0048H04J13/18H04B7/0697H04W72/0466
Inventor 沙拉德·迪帕克·桑布瓦尼达纳恩杰伊·阿肖克·戈尔阿夫尼什·阿格拉瓦尔阿拉克·舒蒂望阿列克谢·戈罗霍夫
Owner QUALCOMM INC
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