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Method and device for dynamic migration of virtual base station

A technology of virtual base station and dynamic migration, used in wireless communication, electrical components, etc.

Active Publication Date: 2020-03-03
ALCATEL LUCENT SHANGHAI BELL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] In order to achieve seamless and lossless virtual base station dynamic migration, and ensure that the base station migration process is transparent to the UE, that is, to minimize the impact on the UE during the migration process, some necessary control plane and user plane parameters need to be obtained from the source The base station (the first virtual base station) forwards to the target base station (the second virtual base station). The interface between the source base station and the target base station is the X2 interface. The current X2 interface does not support this function

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  • Method and device for dynamic migration of virtual base station
  • Method and device for dynamic migration of virtual base station
  • Method and device for dynamic migration of virtual base station

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Embodiment Construction

[0099] Embodiments of the present invention will be further described below in conjunction with the accompanying drawings.

[0100] Taking HARQ as an example, in order to ensure the transparency of virtual base station dynamic migration to the UE, the uplink and downlink HARQ buffer status should be forwarded from the first virtual base station to the second virtual base station. The current X2 interface does not support this operate.

[0101] In order to reduce the impact of virtual base station migration on other network elements (including UE and CN), some UE-specific parameters and cell-specific parameters need to be forwarded from the first virtual base station to the second virtual base station. For UE specific parameters, for example, MME UE S1APID, UE security capabilities, AS security information, UE's AMBR, E-RAB information (E-RAB ID, E-RAB QoS parameters), RRC context, handover restriction list and UE history information etc. These parameters can be handled in a s...

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Abstract

In order to realize seamless and lossless virtual base station dynamic migration and ensure that the base station migration process is transparent for UE, that is, influence on the UE is reduced as much as possible in the migration process, an embodiment of the invention provides an enhanced X2 interface, so that in the enhanced X2 interface, more parameters and control information are sent from a source base station to a target base station. Furthermore, the invention also provides an enhanced S1 interface (an interface between a base station and an MME) and an enhanced S11 interface (an interface between the MME and S-GW), so that S1 path switching of multiple UE can be supported simultaneously, and path switch process in the virtual base station dynamic migration process is accelerated.

Description

[0001] priority [0002] The present invention requires that the patent application date is April 29, 2014, the patent application number is 201410177997.8, and the applicant is the patent application of Shanghai Bell Co., Ltd. as the priority. technical field [0003] Exemplary and non-limiting embodiments of the present invention generally relate to wireless communication, and more particularly relate to a method and device for dynamically migrating a virtual base station in a cloud radio access network. Background technique [0004] C-RAN (RAN: Radio Access Network) has always been regarded as a solution for future cellular wireless communications, which can solve many challenges faced by operators, such as a large number of base stations, high power consumption, operators' capital expenditures and operational costs. The rapid increase of maintenance costs and the low utilization rate of base stations. C-RAN is mainly characterized by a centralized baseband pool and dis...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W36/18
Inventor 王澄邓云蔡立羽
Owner ALCATEL LUCENT SHANGHAI BELL CO LTD