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Method for raising quick-action small-area-selection performace in course of high-speed down bay switch-in

A cell selection and cell technology, applied in the direction of selection device, radio/inductive link selection arrangement, code division multiplexing system, etc., can solve problems such as limiting the performance of HSDPAFCS, and achieve the effect of improving continuity and simplifying the process

Inactive Publication Date: 2003-03-26
HUAWEI TECH CO LTD
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Problems solved by technology

From the above process, it can be seen that since the information exchange between cells is forwarded by RNC, the data filling process of the new cell needs to go through more delays. Due to the influence of these delays and transmission levels, HARQ (Hybrid Automatic Repeat Request ), AMC (Adaptive Coding and Modulation) and other lower-layer transmission parameters cannot be transmitted to the new cell through the RNC, which limits the FCS performance of HSDPA

Method used

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  • Method for raising quick-action small-area-selection performace in course of high-speed down bay switch-in
  • Method for raising quick-action small-area-selection performace in course of high-speed down bay switch-in
  • Method for raising quick-action small-area-selection performace in course of high-speed down bay switch-in

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[0050] refer to Figure 5 . Assume that in the current FCS process, there is a cell A (belonging to NodeB-1) in the active set, and another cell B (belonging to NodeB-2) is entering the active set. At this moment, the link between RNC and NodeB-1 is PATH-0, and the identification of its transmission bearer is: destination UDP port number (UDP port number 1), destination IP address (NodeB-1 IP address).

[0051] Assume that the RLC PDU queue status of the RNC is Figure 6 In the state shown, the PDUs with sequence numbers 0-999 have been sent to NodeB-1, and the PDUs with sequence numbers after 1000 are in the sending window, but have not yet been sent to NodeB-1.

[0052] Assume that the PDU queue status in the MAC-hs buffer of the primary cell is as follows: Figure 7 As shown in the figure, the first 600 PDUs have been sent to the UE, and the ACK information indicating successful reception fed back by the UE has been received. The last 400 PDUs have not yet been acknowle...

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Abstract

The method is utilied in the FCS procedure of the HSDPA to transfer the synchronizing information of the PDU send state between the subzones along the IP transmission route between base stations. When the new subzone enters into the activation set, the main subzone transmits PDU, which is unrecognized in the MAC-hs, to the new subzone through route between the base stations directly. Meanwhile, the RNC also transmits the new PDU to the new subzone. The synzhonrizing procedure between the new sobzone and the other subzones is speeded up since PDU in two routes are transmitted to the new subzone at same time. Thus, the invention raises the continuity of data transmission in FCS procedure, speeds up the synchronizing procedure of the PDU queue and the procedure of filling data as well as reduce the signaling overhead between RNC and Node B.

Description

technical field [0001] The invention relates to a fast cell selection method in high-speed downlink packet access in a wireless communication system. Background technique [0002] The FCS (Fast Cell Selection) technology adopted by HSDPA (High Speed ​​Downlink Packet Access) uses distributed PDU (Protocol Data Unit) queues in each cell to replace the existing RNC (Radio Network Controller) centralized PDU queues. During downlink transmission, the RNC sends PDU data to all the cells in the active set at the same time, and then the UE (user equipment) chooses to receive data from a cell with the best performance, while other cells keep the downlink transmission of the UE at pending state. When the primary cell is replaced, that is, when the UE selects another cell to receive data, the current primary cell is suspended, and the selected new cell starts to download data. After receiving the data sent by the primary cell, the UE feeds back an ACK (acknowledgment) information fo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W36/18H04W56/00
CPCH04W36/18H04W56/00H04W36/0061H04W36/00692
Inventor 张萍颜宏华
Owner HUAWEI TECH CO LTD
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