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Mobility for beam-forming systems

A beamforming and beam-forming technology, applied in the field of mobility, can solve problems such as loss of wireless communication devices and network connections

Active Publication Date: 2018-04-17
TELEFON AB LM ERICSSON (PUBL)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0017] Since the process of moving around a corner can be fast, the signal power (and signal-to-interference ratio) of the beam 110 can drop very quickly and the connection between the wireless communication device and the network can be lost, as explained above

Method used

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  • Mobility for beam-forming systems
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  • Mobility for beam-forming systems

Examples

Experimental program
Comparison scheme
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Embodiment Construction

[0080] In the following, an embodiment will be described in which a beamforming system applies a method in which a measurement report of a mobility procedure can be sent from a wireless communication device to a beam other than the serving beam (usually the intended target beam). network to enable mobility procedures to be enforced.

[0081] The above method is especially beneficial when the signal-to-interference ratio (SIR) of the serving beam drops sharply, so that there is not enough time to perform mobility procedures before the signal-to-interference ratio becomes so poor that reliable communication via the serving beam is not possible of. Therefore, this method can be regarded as a very fast link recovery process.

[0082] figure 2 shows the network nodes (NWN1, and figure 1 network node 120 compared) 200, wireless communication device (WCD, with figure 1 compared to the wireless communication device 100a, 100b) 240 and another network node (NWN2, with figure 1 Ex...

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PUM

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Abstract

A method for a network node of a cellular communication network is disclosed. The network node and at least some other network nodes of the cellular communication network are each adapted to support aplurality of beams of a signal beam-forming scheme and to communicate with a wireless communication device by using at least one of the plurality of beams. The method comprises identifying one or more candidate beams, causing transmission of a reference signal on each of the candidate beams, causing reservation of an uplink resource of at least one of the candidate beams (wherein the uplink resources are for conveying a report from the wireless communication device, and wherein the report is indicative of a result of measurements of the reference signals), and causing the communication with the wireless communication device to use a target beam (wherein one of the candidate beams is selected as the target beam based on the conveyed report). A corresponding method for a wireless communication device is also disclosed, as well as a computer program product, the respective arrangements for a network node and a wireless communication device, the network node and the wireless communicationdevice.

Description

technical field [0001] The present invention generally relates to the field of mobility in wireless communication systems. More specifically, it concerns mobility in systems applying signal beamforming. Background technique [0002] In a typical cellular communication system, it is important to enable handover functionality. Handover is the transfer of control of an ongoing connection between a (mobile) wireless communication device and the network providing the cellular communication system from one network node (the serving network node providing the serving cell) to another network node (the serving network node providing the target cell). target network node). Handovers are typically provided to accomplish transparent service for wireless communication devices over geographic areas extending beyond the coverage area of ​​a single network node. Preferably, the handover should be performed without any (or with minimum) data loss and without any (or with minimum) disturb...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W36/30H04B7/0413H04B7/0408
CPCH04B7/0408H04W36/0088H04B7/0617H04W36/0079H04W36/302H04W16/28H04W36/06H04W36/20
Inventor A.塞德格伦A.雷亚尔C.蒂德斯塔夫
Owner TELEFON AB LM ERICSSON (PUBL)