Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Methods and arrangements in a wireless communication system

A communication system and wireless network technology, which is applied in the field of uplink timing adjustment, can solve the problems that cannot be used for traditional UEs, and achieve the effect of avoiding periodic adjustment and minimizing signaling overhead

Active Publication Date: 2010-09-15
TELEFON AB LM ERICSSON (PUBL)
View PDF2 Cites 8 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Even though signaling resources dedicated to timing adjustments are not needed from an interference perspective, they still exist
Another implementation-dependent pitfall is that if the timing adjustment command is implemented as a binary command, i.e. + / - 1 time step, it will be in one direction (+1 time step) or in the other direction ( -1 time step) for periodic timing adjustments
[0009]Finally, another drawback of the TPC solution is that it cannot be used for legacy UEs (e.g. UEs specified according to 3GPP Release 99), since they cannot use the The TPC symbol is interpreted as a timing adjustment command

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
  • Methods and arrangements in a wireless communication system
  • Methods and arrangements in a wireless communication system
  • Methods and arrangements in a wireless communication system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0025] Hereinafter, the present invention will be described in more detail with reference to specific embodiments and drawings. For purposes of explanation and not limitation, specific details are set forth, such as particular scenarios, techniques, etc., in order to provide a thorough understanding of the invention. It will be apparent, however, to one skilled in the art that the invention may be practiced in other embodiments that depart from these specific details.

[0026] Furthermore, those skilled in the art will understand that the functions and means explained herein below may be implemented using software functionality in conjunction with a programmed microprocessor or general purpose computer, and / or using application specific integrated circuits (ASICs). It should also be understood that although the invention has been described primarily in terms of methods and apparatus, the invention can also be implemented in computer program products and systems comprising a co...

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 present invention relates to methods and arrangements that enable uplink timing adjustment in a UTRAN while minimizing the signalling overhead. This is achieved by a solution where the information about the estimated reception time is used by the NB to determine whether the UEs need to be time adjusted on the UL in order to avoid TTI overlapping and thus interference. The estimated reception time of a UE UL signal is compared with an ideal reception time (the reference time) which can be defined based on the overall knowledge of the estimated reception times. If the difference between the estimated and the ideal reception time is larger than a pre-defined threshold value, meaning that the overlapping with some other UEs TTI will be big, a timing adjustment is initiated.

Description

technical field [0001] The present invention relates to the field of wireless communications, and in particular to uplink timing adjustment in UMTS Terrestrial Radio Access Network (UTRAN). Background technique [0002] Universal Mobile Telecommunications System (UMTS) is one of the third generation mobile communication technologies designed to succeed GSM. The UMTS Terrestrial Radio Access Network (UTRAN) is the radio access network of the UMTS system. WCDMA technology has been chosen as the standard for UTRAN. In WCDMA architecture, such as figure 1 As shown, User Equipment (UE) 150 is wirelessly connected to NodeBs (NBs) 130a-c, which in turn are connected to Radio Network Controllers (RNCs) 100a-b. [0003] Such as Figure 2a As shown, RNC 210 is connected to NB 230, which in turn provides services to two UEs 251,252. In a WCDMA wireless network like this, the signals on the downlink (DL) dedicated channels of different UEs in a cell are 256 chip time aligned in ord...

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): H04B7/26
CPCH04W56/0045H04B7/2681
Inventor 约翰·伯格曼德尔克·杰斯坦伯格
Owner TELEFON AB LM ERICSSON (PUBL)
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com