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Feedback signalling for multicast data transmission

A data transmission system and data technology, applied in the field of data transmission, can solve problems such as low efficiency and interference

Active Publication Date: 2006-09-20
KONINKLIJKE PHILIPS ELECTRONICS NV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] In other words, this known point-to-multipoint transmission occupies a lot of channel capacity in the direction from the receiver to the sender due to the large amount of signaling in the direction from the receiver to the sender and can cause severe interference , so in the case of a large number of receivers in the multicast group, the efficiency may be very low

Method used

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  • Feedback signalling for multicast data transmission
  • Feedback signalling for multicast data transmission
  • Feedback signalling for multicast data transmission

Examples

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Embodiment Construction

[0055] attached figure 1 A simplified representation of a data transmission system for point-to-multipoint data transmission from a transmitting station 2 to a plurality of receiving stations 4, 6, 12, 14 and 18 is shown. attached figure 1 The data transmission system shown in is a wireless data transmission system in which data is sent from a transmitting station 2 to receiving stations 4 , 6 , 12 , 14 and 18 via radio links in the form of data packets. attached figure 1 The data transmission system shown in can be, for example, a cellular mobile radio telecommunication system, such as the GSM system or UMTS system, or a wireless local area network.

[0056] attached figure 1 The transmitting station 2 shown in is adapted to transmit data in packets to a plurality of receiving stations 4, 6, 12, 14 and 18. Each of the plurality of receiving stations 4, 6, 12, 14 and 18 is adapted to send an acknowledgment message back to the transmitting station. These acknowledgments re...

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Abstract

Data transmission in a multicast fashion in which retransmissions are requested by recipients sending feedback to the one sender. Receiving stations are informed about the feedback of another receiving station. This is done by mirroring the feedback of receiving stations to other receiving stations. Due to this, in case, for example, one of the mirrored feedbacks is a negative acknowledgement message, the other receiving stations are informed that it is no longer necessary to provide their feedback, since a retransmission will be initiated anyway. Advantageously, this may allow reduced interference in the direction of the feedback.

Description

technical field [0001] The invention relates to data transmission in multicast mode. In particular, the invention relates to a method of performing point-to-multipoint data transmission from a transmitting station to a plurality of receiving stations, a data transmission method for performing point-to-multipoint data transmission from a transmitting station to a plurality of receiving stations System, relating to a transmitting station for a data transmission system for point-to-multipoint data transmission from the transmitting station to a plurality of receiving stations, and to a receiving station for the data transmission system , the data transmission system is used for point-to-multipoint data transmission from a transmitting station to multiple receiving stations. Background technique [0002] Multicasting data transmissions often creates difficulties when retransmitting data to increase the probability of correct decoding by a large number of receivers, because each...

Claims

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Application Information

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IPC IPC(8): H04L12/18H04B7/005H04W4/06H04W52/36H04W52/48
CPCH04W4/06H04L12/18H04W52/48H04L1/1887H04L12/189H04L1/1896H04L2001/0093H04W52/36H04L1/1607H04W76/002H04L12/1868H04L1/1692H04W28/04H04W76/40
Inventor C·赫尔曼
Owner KONINKLIJKE PHILIPS ELECTRONICS NV
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