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

Method and apparatus for uplink multi-carrier transmit diversity

A transmit diversity and high-speed uplink technology, applied in the field of antenna selection, can solve the problems of multi-carrier operation complexity and algorithm failure

Inactive Publication Date: 2012-10-03
TELEFON AB LM ERICSSON (PUBL)
View PDF5 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Thus, multi-carrier operation introduces significant complexity and renders many prior art algorithms for uplink Tx diversity inoperable

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 and apparatus for uplink multi-carrier transmit diversity
  • Method and apparatus for uplink multi-carrier transmit diversity
  • Method and apparatus for uplink multi-carrier transmit diversity

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0025]In MC-HSUPA operation, scheduling in Node-B will give UE carrier specific scheduling authorization. Scheduling grants are transmitted on the Absolute Grant Channel (E-AGCH) and represent the ratio of the maximum allowed power between the E-DCH Dedicated Physical Data Control Channel (E-DPDCH) and the Dedicated Physical Control Channel (DPCCH) (see, 3GPP TS 25.321). The scheduling grant can be increased or decreased by the serving Node-B or the non-serving Node-B through the relative grant, which is transmitted on the relative grant channel (E-RGCH). The authorization level of the UE is internally maintained in the UE as a service authorization. The serving grant is adjusted based on the relative grant received, and the serving grant is reset to the scheduling grant when received on the E-AGCH.

[0026] figure 2 A situation is shown where the Node-B scheduler has given high grants on one (or subset) of the uplink carrier frequencies and low grants on the other carrier...

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

A method (400) and apparatus (300) for selecting one of a plurality of antennas (320, 322), on a UE (300) implementing transmit diversity in a multi-carrier wireless communication system, for the joint transmission of two or more uplink signals, each modulated onto a different carrier frequency, such as when the carriers share a power amplifier (314). The method (400) and apparatus (300) select an antenna (320, 322) based on channel conditions associated with the carriers, even when prior art transmit diversity methods provide conflicting antenna selection indications.

Description

technical field [0001] The present invention relates generally to wireless communications, and in particular to antenna selection for uplink multicarrier transmit diversity when signals modulated onto two or more carrier frequencies are jointly transmitted on one of a plurality of available antennas methods and equipment. Background technique [0002] The 3rd Generation Partnership Project (3GPP), an industry consortium that defines and publishes technical specifications for wireless communication networks, has defined numerous standards such as High Speed ​​Packet Access (HPSA). 3GPP has introduced multi-carrier operation for uplink in HSPA. Release 9 of the standard allows the parallel transmission of two signals from the same user equipment (UE) to a serving base station (Node-B or eNode-B), where each signal is modulated to an adjacent 5 MHz uplink carrier frequency (this paper called "carrier"). Multi-carrier uplinks have the potential to significantly increase both ...

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): H04B7/06H04L27/26
CPCH04L27/2626H04B7/061H04L5/003H04B7/068H04B7/0691H04B7/0621H04B7/0634H04B7/04
Inventor 约翰·伯格曼约翰·霍尔泰尔埃里克·拉森尼可拉斯·约翰森
Owner TELEFON AB LM ERICSSON (PUBL)