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Method and arrangement for transmitting a data unit in a wireless communications system

A wireless communication system and data unit technology, applied in wireless communication, transmission systems, digital transmission systems, etc., can solve the problems of small available transmit power, reduce coverage, etc., and achieve the effect of reducing overhead

Active Publication Date: 2010-12-29
TELEFON AB LM ERICSSON (PUBL)
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This problem occurs in both uplink and downlink directions, but is more severe in the uplink
This is because the UE has less available transmit power compared to the NodeB and is therefore less able to compensate for deteriorating radio conditions
[0017] This increased overhead will result in a reduction in the coverage that the system can provide, measured for example by distance from a base station that can support a certain bit rate, since most of the PDU will be occupied by header information rather than data

Method used

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  • Method and arrangement for transmitting a data unit in a wireless communications system
  • Method and arrangement for transmitting a data unit in a wireless communications system
  • Method and arrangement for transmitting a data unit in a wireless communications system

Examples

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Embodiment Construction

[0049] To improve throughput in wireless communication systems, the present solution reduces the overhead of a transmitted data unit, such as a MAC PDU, by associating or coupling information to the transmission time instance of the data unit. This information includes the value n associated with the data unit. For example, the value n may correspond to certain preselected bits in the header of the data unit. Since the receiver will be able to deduce the value n (eg, the value of the selected bit or bits) from the transmission time instance, there is no need to include this information in the header when transmitting the data unit. Thus, the present solution reduces overhead by making it possible to omit information, eg one or more bits, from a transmitted data unit without losing information. This solution can be applied in uplink as well as downlink direction.

[0050] The invention is defined by methods and apparatus that can be embodied in the examples described hereinaf...

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Abstract

An object of the present invention is to provide a mechanism for improving coverage in a wireless communications system. The object is achieved by a method in a sending node (210) for transmitting a data unit to a receiving node (220). The data unit comprises a number of bits. The sending node (210) and the receiving node (220) are both comprised in a wireless communications system (200). According to the method, the sending node (210) obtains (606, 810) a value n associated with the data unit. Then, the sending node (210) selects (608, 814) a transmission time instance depending on n, such that a function exists that uniquely associates the selected transmission time instance withn. Finally, the sending node (210) transmits (612, 818) the data unit to the receiving node (220) in the selected transmission time instance, without the value n.

Description

technical field [0001] The present invention relates to a method and a device for transmitting data units in a wireless communication system. Background technique [0002] Third generation mobile cellular technology, also known as Universal Mobile Telecommunications System (UMTS), is based on Wideband Code Division Multiple Access (WCDMA) radio technology, which offers greater spectral efficiency and higher bandwidth than earlier systems. The radio access network part of the UMTS system is called the UMTS Radio Access Network (UTRAN). [0003] The 3rd Generation Partnership Project (3GPP) is responsible for developing standards related to WCDMA and UTRAN. [0004] High Speed ​​Downlink Packet Access (HSDPA), part of the WCDMA standard, has introduced new downlink transport channels, potentially increasing download speeds to over 10 Mbit / s. The uplink equivalent, High Speed ​​Uplink Packet Access (HSUPA), is sometimes called Enhanced Uplink (EUL). Together, these two techn...

Claims

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Application Information

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IPC IPC(8): H04W28/06
CPCH04L1/1812H04L1/1822H04W28/065H04W28/04
Inventor P·J·托尔斯纳J·佩萨S·瓦格M·萨格富斯
Owner TELEFON AB LM ERICSSON (PUBL)
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