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Methods and arrangements in a wireless communication system

A communication system, wireless network technology, applied in the field of uplink timing adjustment

Inactive Publication Date: 2013-11-06
TELEFON AB LM ERICSSON (PUBL)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[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

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

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Embodiment Construction

[0027] Hereinafter, the present invention will be described in more detail with reference to specific embodiments and drawings. For the purpose of explanation and not limitation, specific details are set forth, such as specific scenarios, technologies, etc., to provide a comprehensive understanding of the present invention. However, it is obvious to those skilled in the art that the present invention can be implemented in other embodiments different from these specific details.

[0028] In addition, those skilled in the art will understand that software functions can be combined with a programmed microprocessor or general-purpose computer, and / or an application specific integrated circuit (ASIC) can be used to implement the functions and devices explained below in this document. It should also be understood that although the present invention is mainly described in the form of a method and device, the present invention can also be implemented in a computer program product and a s...

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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] like 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 order ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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)
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