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ACK/NACK messaging in a single frequency network

A technology of single-frequency network and feedback message, applied in transmission system, digital transmission system, multiple use of transmission path, etc., can solve the problems of lack, lack of receiving quality, and incapable of feedback transmission, etc.

Active Publication Date: 2018-08-03
IPCOM GMBH & CO KG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Known techniques for transmitting feedback to a single receiver through multiple transmitters lack the ability for ACKs or NACKs transmitted simultaneously by different transmitters to appear as one ACK or NACK and lack the ability for ACKs transmitted simultaneously by different transmitters ( or NACK) to cause improved reception quality at the receiver, so feedback cannot be passed from multiple base stations to a single UE

Method used

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  • ACK/NACK messaging in a single frequency network
  • ACK/NACK messaging in a single frequency network
  • ACK/NACK messaging in a single frequency network

Examples

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Embodiment Construction

[0024] refer to figure 1 , in the first embodiment, three base stations BS n 、BS n+1 and BS n+2 It is configured as a single frequency network for UE, that is, the base station transmits data to the UE and receives data from the UE at the same time. To the UE, the overlapping signals from the base stations effectively appear as originating from one single cell.

[0025] An automatic repeat request (ARQ) procedure is applied in the uplink. Each base station involved transmits individual feedback for received uplink packets to the transmitting UE.

[0026] It is an object of the present invention that an ACK of a single transmission should be reliably detected even if several NACKs are transmitted simultaneously. This is important to avoid unnecessary retransmissions. It is also preferred that a reliable detection of not transmitting an ACK corresponding to a particular transmitted packet is provided. This is important to ensure that necessary retransmissions are not miss...

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Abstract

The invention provides a method of providing feedback from a plurality of base stations of a single frequency network to a user equipment device to indicate if a data transmission has been received successfully, wherein a positive acknowledgement of successful receipt is transmitted using a first feedback resource and a negative acknowledgement of unsuccessful receipt is transmitted using a secondfeedback resource, the first and second feedback resources being mutually orthogonal.

Description

technical field [0001] The present invention relates to single frequency networks in which a user equipment device receives simultaneous transmissions from multiple base stations, the transmissions from the base stations using the same radio resources. Background technique [0002] Multiple base stations form a single frequency network and thus appear as a single cell to the mobile. In addition, according to the movement of the UE, the base station can be added to the set of base stations currently transmitting data to a specific mobile device (UE), and the base station can be removed from the set of base stations currently transmitting data to a specific mobile device (UE) to Covering the area where the UE is expected to move next, ie, with respect to transmissions to a particular UE, some cells are switched on and some cells are switched off depending on the UE's movement. If there is no need for the base station to transmit to any UE, it can also be completely switched o...

Claims

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Application Information

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IPC IPC(8): H04L1/18H04W36/18H04L5/00
CPCH04L1/18H04L1/16H04L5/0055H04W36/00692H04L1/1861H04L5/0007H04L5/0016H04L5/0028H04L2001/0093H04L1/1812H04W72/04H04L1/1864
Inventor M·别纳斯A·施密特M·汉斯A·卢夫特
Owner IPCOM GMBH & CO KG
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