Method and device for expanding residence covering range based on established distance identify value
A technology of distance identification and cell coverage, which is applied in the direction of selecting devices, network planning, electrical components, etc., and can solve the problems of reporting, affecting the establishment and processing of dedicated channels, and limiting the coverage of cells.
Active Publication Date: 2007-06-20
HUAWEI TECH CO LTD
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[0006] But currently in the WCDMA system will stipulate T P The specific range of values, such as T P The general range of values is 0 to 255, represented by 8 bits, and the unit length is 3 chips, and the wireless transmission distance corresponding to 1 chip is 78.125 meters; thus, it is necessary to consider the specific coverage of each NodeB at the initial stage of network construction, that is, a The coverage of NodeB should generally not exceed T P The actual distance that can be identified, for example, when the coverage radius of NodeB exceeds 255×3×78.125≈60Km, Node cannot extend beyond T P The actual distance between users within the identified distance range and the NodeB is based on T P Report to RNC in form, that is, NodeB cannot calculate the actual distance between users within the range of cell radius greater than 60Km and NodeB based on T P Reported to the RNC in the form, which will affect the subsequent dedicated channel establishment processing
[0007] To sum up, if the T P In the subsequent network construction process, it is necessary to ensure that the actual coverage of each NodeB cannot exceed T P The actual distance that can be identified, so it will appear due to T P The problem of limiting the coverage of the cell due to the specified value
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[0046] The main design idea of the technical solution of the present invention is to divide the same cell into different ring-shaped coverage areas for management without modifying the WCDMA basic protocol, so as to exceed the specified T of the system. Pmax Within the coverage area of the maximum distance that can be identified, the NodeB can also base the distance between the users within these ranges and the NodeB based on T P The information form is identified and reported to the RNC, so as to avoid affecting the establishment of dedicated channels for users in these areas. In this way, even if the WCDMA system has pre-specified T P The value range of , in the subsequent network construction process, the actual coverage of NodeB can also be made beyond T P The distance covered by the maximum value can be identified, so it will not be affected by T P The limitation of the value range, that is, T is pre-specified in the WCDMA system P In the case of a range of values,...
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The NodeB executes the following steps for the users in coverage area within the distance marked by nTPmax-(n+1)TPmax in the radius of cell: the difference between the distance of user and NodeB and the distance marked by nTPmax is converted into TP information that is reported to RNC; according to the TP information sent down by RNC, getting the sum of the distance marked by TP information and the distance marked by nTPmax as the distance between user and NobeB; wherein, TP represents the distance mark value, TPmax represents the maximal distance mark value defined by system, and n is integer. The invention also reveals an apparatus for expanding the cell coverage range.
Description
technical field [0001] The invention relates to the technical field of wideband code division multiple access WCDMA, in particular to a cell coverage extension method and device thereof based on a specified distance identification value. Background technique [0002] Currently, in a Wideband Code Division Multiple Access (WCDMA, Wideband Code Division Multiple Access) system, each NodeB generally searches for user access information on a Physical Random Access Channel (PRACH, Physical Random Access Channel) in a cell, and according to The searched user access information calculates the distance between the user and the NodeB; then the NodeB converts the calculated distance between the user and the NodeB into T based on the following expression P form: [0003] T P =Distance between user and NodeB÷T P Units (Formula 1); [0004] NodeB is based on T converted and processed according to the above formula 1 P To identify the distance between the user and the NodeB, and repo...
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IPC IPC(8): H04Q7/36H04W16/26
Inventor 付红军
Owner HUAWEI TECH CO LTD