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Method for improved frequency division duplex operation in a wireless communications system

A wireless communication system, frequency division duplex technology, applied in the radio transmission system, transmission system, communication between multiple stations, etc., can solve the problem that the carrier frequency of FL and RL cannot be adjusted, and achieve flexible spectrum allocation Effect

Inactive Publication Date: 2008-11-19
LUCENT TECH INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

FL and RL channel assignments will no longer be supported, as the relationship between the assigned FL and RL channel frequencies is unknown
Additionally, with such coverage-dependent channel spacing, when a mobile terminal moves between coverage areas with different frequency spacing between RL and FL channels, the mobile terminal will not be able to tune to the changed FL and RL carriers frequency

Method used

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  • Method for improved frequency division duplex operation in a wireless communications system
  • Method for improved frequency division duplex operation in a wireless communications system
  • Method for improved frequency division duplex operation in a wireless communications system

Examples

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Embodiment Construction

[0010] image 3 The exemplary wireless network shown in is according to the CDMA2000 1xEVDO standard. The digital data network supports voice over IP (VoIP), high-speed data and session video downloads, digital image uploads, and more. Using terminology commonly associated with these standards, RAN 301 includes a Radio Network Controller (RNC) 302 connected to a plurality of BTSs, shown illustratively as BTS 303 and BTS 304 . The RNC 302 is connected to a packet data switching node (PDSN) 305, which in turn is connected to a packet network 306, such as the Internet. A mobile station (MS) 307 , also known as an access terminal (AT), is shown in communication with the BTS 303 . On FL, MS 307 communicates on a channel of frequency F1, and on RL it communicates on a channel of frequency F2. According to this embodiment of the invention, F1 and F2 do not have to be located in different blocks in corresponding frequency segments within the same frequency class. They may be locat...

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Abstract

In a frequency division duplex wireless communications system, the wireless network independently and separately assigns RL and FL carrier frequencies to a mobile station, thereby supporting a variable duplex frequency separation. The assigned RL and FL carrier frequencies can be within the same frequency segment, in different frequency segments within a band class, or can be in different band classes. This feature is supported by new channel mapping and signaling.

Description

technical field [0001] The present invention relates to wireless communications, and more particularly to frequency division duplex operation of wireless communications systems. Background technique [0002] According to current practice, the FCC sells to wireless service providers complementary blocks of spectrum in different frequency bands, such as within the 800 MHz band class, the 1.9 GHz band class, or other band classes. For example, each such purchased spectrum block in a frequency segment in the 800 MHz band class is spaced apart by a fixed constant frequency from its complementary spectrum block in another frequency segment in the same band class. One of the complementary blocks of spectrum purchased by the wireless service provider is used for forward link (FL) transmission (from the wireless network to the mobile terminal) and the other complementary block is used (from the mobile terminal to the wireless network) Reverse link (RL) transmission. figure 1 A prio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/26
CPCH04B7/2621H04B2201/70719
Inventor 赵劲夫S·瓦苏德文邹加林
Owner LUCENT TECH INC