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Inter-node B (NB) mobility parameter negotiation method and system

A mobility and inter-base station technology, applied in wireless communication, network traffic/resource management, electrical components, etc., can solve problems such as inconsistency in mobility parameter modification, information crossover, and differentiated negotiation messages, so as to avoid inconsistency in mobility parameter modification , improve robustness, and improve network performance

Inactive Publication Date: 2011-07-06
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] However, in the current negotiation process, only the information of the negotiated cell pair is carried in the request message (including the cell ID of the source cell and the cell ID of the target cell), while the confirmation message and the failure message do not carry the information of the negotiated cell pair. Therefore, There will be the following problem: when multiple serving cells under the current source base station initiate mobility parameter negotiation for cells of other base stations, if the source base station receives confirmation / failure messages from multiple target base stations / target cells, it may not be able to identify the mobility The mobility handover parameter negotiation is for the source cell; in addition, when the serving cell of the source base station initiates the mobility parameter negotiation process for multiple target cells in parallel, it may not be possible to distinguish the negotiation message by the transport layer address. For the negotiation message from which target cell, the source base station is even more unable to distinguish which target cell the acknowledgment / failure message comes from, which will lead to information crossover, and eventually lead to inconsistency in the modification of mobility parameters between cell pairs, resulting in incorrect modification of cell mobility parameters and network failure. Performance drop

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  • Inter-node B (NB) mobility parameter negotiation method and system

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Embodiment 1

[0046] Figure 4 It is a schematic diagram of the mobility parameter modification negotiation flow in Embodiment 1 of the present invention, as shown in Figure 4 As shown, the mobility parameter modification negotiation in Embodiment 1 of the present invention includes the following steps:

[0047] Step 401: the source base station sends a mobility parameter modification request message to the target base station.

[0048] The mobility parameter modification request message may be initiated when needed, such as when the mobility parameter is optimized due to load balancing, or when the mobility parameter needs to be adjusted in a mobility optimization scenario. The mobility parameter modification request message generally includes: the cell ID of the source cell, the cell ID of the target cell, the source base station's own mobility parameter information, the target base station's proposed modification mobility parameter information, and the reason for initiating the mobilit...

Embodiment 2

[0055] In this embodiment, the source cell needs to negotiate mobility handover parameters with the target cell 1 and the target cell 2, and the negotiation with the target cell 1 succeeds, but the negotiation with the target cell 2 fails. Figure 5 It is a schematic diagram of the mobility parameter modification negotiation flow in Embodiment 2 of the present invention, as shown in Figure 5 As shown, the mobility parameter modification negotiation in Embodiment 2 of the present invention includes the following steps:

[0056] Step 501: The source cell needs to negotiate mobility handover parameters with the target cell 1, and the source base station sends a mobility parameter modification request message to the target base station.

[0057] Here, the mobility parameter modification request message includes: the cell ID of the source cell, the cell ID of the target cell 1, the mobility parameter information of the source base station itself, the mobility parameter information...

Embodiment 3

[0068] In this embodiment, both the source cell 1 and the source cell 2 need to negotiate mobility handover parameters with the target cell, and the negotiation between the source cell 1 and the target cell fails, while the negotiation between the source cell 2 and the target cell succeeds. Figure 6 It is a schematic diagram of the mobility parameter modification negotiation flow in Embodiment 3 of the present invention, as shown in Figure 6 As shown, the mobility parameter modification negotiation in Embodiment 3 of the present invention includes the following steps:

[0069] Step 601: The source cell 2 needs to negotiate mobility handover parameters with the target cell, and the source base station sends a mobility parameter modification request message to the target base station.

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Abstract

The invention discloses an inter-node B (NB) mobility parameter negotiation method, which comprises the following steps that: a target NB performs judgment and optimization processing of mobility parameters according to a mobility parameter modification request message after receiving the mobility parameter modification request message from a source NB, and sends a mobility parameter modification acknowledgement message to the source NB if the processing succeeds, wherein the mobility parameter modification acknowledgement message at least carries a message type and a source cell identifier (ID); and if the processing fails, the target NB sends a mobility parameter modification failure message to the source NB, wherein the mobility parameter modification failure message at least carries the message type, a failure reason and the source cell ID. The invention further discloses an inter-NB mobility parameter negotiation system correspondingly. By the method and the system provided by the invention, inconsistent mobility parameter modification caused by message crossing can be avoided for the source NB, so that the robustness of the mobility parameter modification is improved, and network performance is improved.

Description

technical field [0001] The invention relates to the technical field of wireless communication, in particular to a method and system for negotiating mobility parameters between base stations. Background technique [0002] The Long Term Evolution (LTE) network of the third-generation mobile communication consists of the Evolved Universal Terrestrial Radio Access Network (E-UTRAN) and the Evolved Packet Core (EPC) network. composition. E-UTRAN includes a collection of evolved base stations (Evolved NodeB, eNB), and EPC includes Mobile Management Entity (Mobile Management Entity, MME) and Serving Gateway (Serving Gateway, S-GW), etc., and the network architecture is flat. The eNB and MME / S-GW are connected through the S1 interface, and the eNBs can be connected through the X2 interface, and S1 and X2 are logical interfaces. One MME / S-GW can manage one or more eNBs, one eNB can also be controlled by multiple MMEs / S-GWs, and one eNB can manage one or more cells. The advanced LT...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W36/32H04W88/08
CPCH04W24/02H04W92/20H04W36/22H04W28/18H04W36/08H04W36/0083H04W28/04
Inventor 高音方建民
Owner ZTE CORP