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Optimization of signalling of absolute grants for uplink transmission using time-division multiplexing

A link transmission, variable technology, applied in transmission system, digital transmission system, multiple use of transmission path, etc., can solve problems such as different mechanisms

Active Publication Date: 2016-02-24
NOKIA TECHNOLOGLES OY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Thus, TDM for WCDMA effectively corresponds to a typical TDM system such as GSM, but the mechanisms behind it are quite different

Method used

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  • Optimization of signalling of absolute grants for uplink transmission using time-division multiplexing
  • Optimization of signalling of absolute grants for uplink transmission using time-division multiplexing
  • Optimization of signalling of absolute grants for uplink transmission using time-division multiplexing

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Embodiment Construction

[0110] Hereinafter, some embodiments of the present invention are described in detail with reference to the accompanying drawings, in which features of the embodiments can be freely combined with each other unless otherwise described. It should be expressly understood, however, that the description of certain embodiments has been given by way of example only, and it is in no way intended to limit the invention to the disclosed details.

[0111] Furthermore, it should be understood that the apparatus is configured to perform the corresponding method, although only the apparatus or only the method is described in some cases.

[0112] TDM scheduling can be implemented in conventional 3GPP WCDMA systems. However, signaling overhead is significant. Assuming that in TDM mode, the Node B has to assign one UE that will transmit in the next period, while another UE that transmitted in the previous period has to be informed that it has to stop transmitting. Therefore, 2 commands must ...

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Abstract

Conventionally, all active UEs monitor an absolute grant channel. When a transmission from an eNB occurs, each UE tries to decode the grant message (e.g. by performing a CRC check with its E-RNTI, which is associated uniquely to each UE in the cell). If a UE successfully decodes the grant, it starts a grant update procedure, setting its Serving Grant to the value indicated in the grant message. The eNB then sends a further grant command indicating a Serving Grant value of zero to the other UEs, in order to silence them. According to the invention, any UE which receives an absolute grant that is not intended for it (e.g. the CRC check fails) automatically sets its Serving Grant to zero. This way a single grant command provides an absolute grant for one UE and at the same time silences other UEs in a cell. The eNB does not need to send the further grant command to UEs other than the one for which the absolute grant is intended. With respect to the conventional art, the signalling overhead is thus reduced and the problem of not utilized TTIs (because only one absolute grant may be transmitted per TTI) is solved.

Description

technical field [0001] The present invention relates to apparatus, methods, systems and computer program products related to Wideband Code Division Multiple Access (WCDMA) transmissions in the uplink (UL) direction, in particular to the High Speed ​​Uplink Packet Access (HSUPA) subsystem. More particularly, the present invention relates to apparatuses, methods, systems and computer program products for uplink grant procedures in 3GPP WCDMA transmissions. Background technique [0002] abbreviation [0003] 3GPP 3rd Generation Partnership Project [0004] CRC Cyclic Redundancy Check [0005] DPCCH Dedicated Physical Control Channel [0006] eNB Evolved Node B [0007] E-AGCH Enhanced Absolute Granted Channel [0008] E-DCH Enhanced Dedicated Channel [0009] E-DPDCH Enhanced Dedicated Physical Data Channel [0010] E-RGCH Enhanced Relative Granted Channel [0011] E-RNTIE-DCHRNTI [0012] EUL Enhanced Uplink [0013] E-UTRAN evolution UTRAN [0014] FDD frequency di...

Claims

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Application Information

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IPC IPC(8): H04W72/12H04W28/12
CPCH04W72/1268H04W28/0205H04W72/23H04L5/0098H04W74/006
Inventor M.贾努斯泽维斯基M.帕内克K.M.兰塔-阿霍
Owner NOKIA TECHNOLOGLES OY
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