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Methods and apparatus related to using a wireless terminal scrambling identifier

A wireless terminal and identifier technology, applied in the field of multi-user communication systems, can solve problems such as hindering the communication process of active identification number wireless terminals, hindering the communication process of wireless terminals, adding interference to uplink signals, etc.

Active Publication Date: 2010-12-08
QUALCOMM INC
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

Regardless of the reason why the wireless terminal assumes the wrong identification number, this situation can cause the wireless terminal to transmit on channel resources that are not actually allocated to it
This results in adding interference to the uplink signal from the wireless terminal to which the erroneously taken identification number really belongs, thus hampering the communication process for that wireless terminal
[0009] In view of the above discussion, it should be appreciated that there is a need for new and improved ways of mitigating the effects of a situation where one or more wireless terminals in a system have incorrectly assumed an Active ID, thereby preventing the wireless terminal to which the Active ID really belongs. The communication process of the terminal

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  • Methods and apparatus related to using a wireless terminal scrambling identifier
  • Methods and apparatus related to using a wireless terminal scrambling identifier
  • Methods and apparatus related to using a wireless terminal scrambling identifier

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Embodiment Construction

[0041] figure 1 An exemplary communication system 100 is shown implemented in accordance with various embodiments. Exemplary communication system 100 includes a plurality of cells: cell 1102 , cell M 104 . Exemplary system 100 is, for example, an exemplary multiple access orthogonal frequency division multiplexing (OFDM) wireless communication system, eg, a multiple access OFDM spread spectrum system including tone hopping. Each cell 102, 104 of the exemplary system 100 includes three sectors. According to various embodiments, cells without subdivision into multiple sectors (N=1), cells with two sectors (N=2), and cells with more than 3 sectors (N>3) are also possible. Each sector supports one or more carriers and / or downlink tone blocks. At least some of the downlink tone blocks have corresponding uplink tone blocks. In some embodiments, at least some of the sectors support three downlink / uplink tone block pairs. Each combination of sector and tone block pair for a bas...

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Abstract

The invention relates to methods and apparatus for using a wireless terminal scrambling identifier. User specific modulation-symbol scrambling is implemented for various uplink segments, e.g., uplink traffic acknowledgement channel (ULTACH), uplink state request channel (ULSRCH), and uplink dedicated control channel (ULDCCH) segments. A wireless terminal is assigned a wireless terminal scrambling identifier. A set of ordered input modulation symbols are determined for an uplink dedicated segment to which user specific scrambling is to be applied. One bit of the assigned wireless terminal scrambling identifier is associated with each of the ordered input modulation symbols of a segment in accordance with a predetermined mapping. For each input modulation symbol a scrambling operation, e.g., a phase rotation of the input modulation symbol is performed as a function of the associated user specific scrambling identifier bit to obtain a corresponding output modulation symbol. A value of (0, 1) for a scrambling ID bit is associated with a (first, second) amount of phase rotation, e.g., (0, 180) degrees, respectively.

Description

[0001] Information about divisional applications [0002] This application is the application number PCT / US2007 / 066650; the application date is April 13, 2007; after the PCT application with the title of invention "A Method and Device for Disrupting Identifiers Using Wireless Terminals" enters the Chinese national phase, the application number is A divisional application of the invention patent application of 200780012615.4. [0003] Related applications [0004] The present invention is claimed in Serials 60 / 792,223 and 60 / 792,223, both filed April 14, 2006, entitled "METHODS AND APPARATUS RELATED TO USING A WIRELESSTERMINAL SCRAMBLING IDENTIFIER" Interest in the filing date of U.S. Provisional Patent Application No. 60 / 792,021. technical field [0005] The present invention relates to multi-user communication systems, and more particularly to methods and apparatus for mitigating the effects of one or more users in such systems mistakenly assuming the same identity as th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L27/26H04L5/02
CPCH04L5/0007H04L27/2655H04L27/2602H04L27/18H04L27/20
Inventor 帕勃罗·阿尼哥斯坦普拉尚斯·汉德厉隽怿拉吉夫·拉罗亚萨蒂亚德夫·文卡塔·乌帕拉
Owner QUALCOMM INC
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