Unlock instant, AI-driven research and patent intelligence for your innovation.

Method for providing communication channel in time division duplexing (TDD) mode between TDD mobile and TDD base station

A communication channel and time-division duplex technology, which is applied in communication between multiple stations, wireless communication, electrical components, etc., can solve the problem of expensive filters

Inactive Publication Date: 2004-08-04
GOOGLE TECH HLDG LLC
View PDF0 Cites 12 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

One way to overcome this problem is to use very steep (sharp) RF filters to exclude or reduce any overlap from the FDD upstream channel to adjacent channels, but such filters are very expensive

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for providing communication channel in time division duplexing (TDD) mode between TDD mobile and TDD base station
  • Method for providing communication channel in time division duplexing (TDD) mode between TDD mobile and TDD base station
  • Method for providing communication channel in time division duplexing (TDD) mode between TDD mobile and TDD base station

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0026] figure 1 A schematic showing the different frequency channels f and time slots t available for communication is shown figure 1 . It is known that communication systems have special frequency channels which are allocated for use as communication channels between base stations of the network and mobile stations using the network. As mentioned above, network operators typically provide services to mobile stations in Frequency Division Duplex (FDD) mode or Time Division Duplex (TDD) mode. Typically, different frequency channels to be used for TDD communication channels are allocated to different operators.

[0027] For example, if figure 1 As shown in the frequency channel f 1 , f 2 , f 3 and f 4 Assigned for TDD communication and can be assigned to multiple Operators. frequency channel f 6 , f 7 , f 8 , f 9 , f 10 , f 11 and f 12 Allocated for FDD communication, frequency channel f 6 , f 7 and f 8 For uplink channel, frequency channel f 10 , f 11 and f ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The amount of interference to communications in Time Division Duplexing (TDD) mode between a TDD mobile and a TDD base station from a mobile operating in Frequency Division Duplexing (FDD) mode that is located near to the TDD base station can be reduced by changing at least the frequency channel allocated to a particular TDD communications channel, and prefereably also by changing the timeslot allocated to that particular TDD communications channel. Thus instead of allocating particular frequency channels to particular operators for TDD communication, the frequency channels used by any particular operator for TDD communication can change from frame to frame. The timeslots within a frame on a frequency channel may stay the same or may also change. Thus, any particular communications channel (6,8) will not remain on the same frequency channel, nor, possibly, on the same timeslot within a frame, from one frame to the next, so that no one TDD channel will have continuous interference from an FDD channel, but all the TDD communications channels will have the interference shared between them.

Description

technical field [0001] The present invention relates to a method of providing a communication channel in Time Division Duplex (TDD) mode between a TDD mobile and a TDD base station, and in particular (but not exclusively) to Time Division Duplex (TDD) between a TDD mobile and a TDD base station mode to reduce communication interference from mobile stations operating in Frequency Division Duplex (FDD) mode located near a TDD base station. Background technique [0002] In a (eg cellular telephone) Universal Mobile Telecommunications System (UMTS), communication between a mobile station and a base station requires both an uplink channel (from the mobile station to the base station) and a downlink channel (from the base station to the mobile station). It is useful to provide the channel as a time division duplex (TDD) or frequency division duplex system. Typically, different operators within the same coverage area will have one or two systems available to their customers. [0...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): H04B7/26H04W16/00
CPCH04W16/00H04B7/2615
Inventor 卢斯·洛佩斯
Owner GOOGLE TECH HLDG LLC