Device and method for improving switch characteristic of wireless access network
A wireless access network and wireless access point technology, applied in wireless communication, electrical components, etc., can solve the problems of lowering the transmission rate and increasing wireless interference.
Active Publication Date: 2012-07-04
TELEFON AB LM ERICSSON (PUBL)
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Problems solved by technology
[0006] Another problem associated with TCP session handover in radio access networks is that out-of-order received packets will be retransmitted, which increases wireless interference, and the transmission rate may be lowered as a result, because TCP Interpret out-of-order packets as network congestion
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[0094] The present invention will now be described in more detail with reference to FIGS. 2-6.
[0095] exist figure 1 In -6, the corresponding elements have been given the same reference number and figure header number, for example figure 1 API 110 in FIG. 2 is referred to as AP1 210, and so on.
[0096] Figure 2A An illustrative example of a radio access network according to the invention in the form of a WLAN 200 is depicted. like Figure 2A As shown, WLAN 200 includes at least two wireless access points AP1 210 and AP2 220 , which are optionally connected to access router AR 250 through conventional layer 2 switches M-L2S 1230 and M-L2S 2235 . There are many possibilities; for example the AP might be directly connected to the AR 250 . AR 250 may be connected to other ARs of WLAN 200 (not shown in Figure 2) and / or to other communication networks 260, such as the Internet and / or 3GPP UTRAN. AP1 210 and AP2 220 have respective conventional wireless transceiver units (n...
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The invention relates to a device and a method for improving the switch characteristic of a wireless access network. The invention provides a method for assisting in switching a communication session associated with UT from a first wireless access point AP1 to a second wireless access point AP2 in a wireless access network. The method is executed by the AP1 and comprises the following steps of: receiving a switch intention notification message which comprises a session identifier identifying the session and indicates that the UT intends to execute session switch; allocating a buffer storage space for the session in a memory of the AP1; and buffering a downlink packet addressed to the UT in the buffer memory as a response to the reception of the switch intention notification message. The invention also provides UT, AP1, AP2 and AR and a software program cooperating with and / or realizing the method provided by the invention. The invention provides smoother switch.
Description
[0001] This application is a divisional application of the invention patent application with the application number 200580051178.8, the application date is July 25, 2005, and the invention title is "Apparatus and Method for Improving Handover Characteristics of Wireless Access Network". technical field [0002] The present invention relates generally to radio access networks, and more particularly to methods and apparatus for facilitating handover of communication sessions in such networks. Background technique [0003] figure 1 The basic network architecture of a conventional wireless access network 100 in the form of a wireless local area network WLAN is illustrated, which includes a first access point AP 1110 , a second access point AP2 120 and an access router AR 150 . The WLAN 100 may be connected to other networks 160 such as the Internet and / or UTRAN (Universal Terrestrial Radio Access Network). exist figure 1 In , AP 1110 and AP 2120 are connected to AR 150 through...
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IPC IPC(8): H04W36/02
Inventor J·萨克斯I·赫沃诺
Owner TELEFON AB LM ERICSSON (PUBL)