Method and device for detecting transmission time delay difference between soft exchange activating pole every base state
A technology of transmission delay and soft switching, which is applied in the communication, synchronization device, selection device and other directions between multiple stations, which can solve the problems of waste of air interface resources and occupation of air interface resources, so as to avoid waste, improve communication efficiency, reduce cost effect
Active Publication Date: 2008-11-26
XFUSION DIGITAL TECH CO LTD
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[0007] However, in the above prior art, since the transmission delay difference is detected on the MSS side, and the downlink synchronization control of each BS in the active set is performed on the BS side, it is necessary for the MMS to report the detection result to the BS through a MAC management message, However, MAC management messages occupy air interface resources, so this solution will cause unnecessary waste of air interface resources
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[0027] The present invention will be described below in conjunction with the accompanying drawings and specific embodiments.
[0028] Since in the process of downlink synchronization control for each base station in the softswitch active set, the detected transmission delay is the physical air interface delay, which is generally only related to the distance from the BS to the MSS, and the difference between the uplink and downlink transmission delays is very small. Based on this technical feature, the present invention realizes the purpose of the invention by detecting the uplink transmission time delay.
[0029] figure 1 It is a flow chart of detecting the transmission delay difference among the base stations in the active set of the softswitch according to the present invention. see figure 1 , the process includes:
[0030] Step 101: Set a reference time in each base station in the softswitch active set, and each base station measures the delay between the time when the u...
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This invention discloses a method for testing transmission time delay difference among base stations in a soft switch activation set, which sets a primary time in the base stations of the set, the base stations test the time delay between the time of the MSS up signals arriving at the base stations actually and the primary time, compare the measured results of the stations to get transmission time delay difference among the base stations. This invention also discloses a device for testing transmission time delay difference among base stations in the set including: at least one up time delay test unit set on each base station of the activation set for testing the up time delay of MSS, a computation unit for transmitting time delay difference set on the central management device for getting the transmission time delay difference among the base stations.
Description
technical field [0001] The present invention relates to the synchronous control technology of the soft switch in the wireless communication system, in particular to a method of detecting the transmission time between the base stations in the active set when synchronously controlling the time when the downlink signals of the base stations in the active set of the soft switch arrive at the mobile user terminal Method and device for delay difference. Background technique [0002] IEEE802.16 is a point-to-multipoint wireless data access technology disclosed by the Institute of Electrical and Electronics Engineers (IEEE). The access system disclosed in IEEE802.16 consists of a base station (BS) and multiple user terminals (SS). Communication between BS and SS is carried out in units of radio frames. Each radio frame is composed of an uplink subframe and a downlink subframe. At the beginning of each downlink subframe, the BS notifies the SS of how the channel resources of the c...
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IPC IPC(8): H04Q7/38H04B7/26H04W36/18H04W56/00
Inventor 李永茂
Owner XFUSION DIGITAL TECH CO LTD