Method for determining the number of effective channels and the effective channel rate in a CDMA network
AssigneeSamsung Electronics Co., Ltd.
InventorByung-chul You
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Abstract
A method for determining the number of effective channels and the effective channel rate in a CDMA network is disclosed. The method calculates the ratio of the soft handoff area to the total service area and the soft handoff channel rate. The results are used to determine both the number of effective channels and the effective channel rate.
Claims21
In a code division multiple access (CDMA) digital mobile communication system, a method for determining a number of effective channels and an effective channel rate comprising the steps of:
- (a) calculating the ratio of soft handoff area to total service area;
- (b) calculating a soft handoff channel rate as a function of said ratio of the soft handoff area to the total service area;
- and
- (c) calculating a number of effective channels, NEFFECTIVE, and an effective channel rate, RCH-EFFECTIVE as a function of said ratio of the soft handoff area to the total service area and said soft handoff channel rate.
A method for designing a CDMA network using calculation of capacity variation and effective channel rate per sector in connection with soft handoff rate comprising the steps of:
- calculating a number of effective channels, NEFFECTIVE as:
- NEFFECTIVE=NMAX·((1−HCT)+HC2/2+HC3/3), where
- NMAX is the maximum number of channels at a system loading environment defined in a practical system design,
- HCT is handoff channel rate,
- HC2 is 2-way handoff channel rate among total service area and
- HC3 is 3-way handoff channel rate among total service area;
- calculating the effective channel rate, RCH-EFFECTIVE in away of RCH-EFFECTIVE=(1−HCT)+HC2/2+HC3/3.
A method for determining a number of effective channels and an effective channel rate using a calculation of
- capacity variation and effective channel rate per sector in connection with soft handoff rate comprising the steps of:
- calculating the number of effective channels, NEFFECTIVE as N EFFECTIVE = N MAX · 1 ( 2 - 1 - H AT ) 2 ,
- NMAX is the maximum number of channels at a system loading environment defined in a practical system design,
- NMAX HAT is ratio of the soft handoff area to the total service area;
- and
- calculating the effective channel rate, RCH-EFFECTIVE in connection with R CH - EFFECTIVE = 1 ( 2 - 1 - H AT ) 2 .
A method for designing a CDMA network, comprising the steps of:
- (i) determining an area that the CDMA network is intended to service;
- (ii) placing a base station in said determined area;
- (iii) selecting a transmission power for said base station;
- (iv) calculating radius values R, C and D for said base station using said selected transmission power and predetermined network parameters;
- (v) calculating a required number of base stations for the network from said determined area and radius values R, C and D;
- (vi) calculating values for NEFFECTIVE, RCH-EFFECTIVE, HAT and HCT for the CDMA network;
- (vii) determining whether said calculated values for NEFFECTIVE, RCH-EFFECTIVE, HAT and H satisfy target values established at an initial set-up time;
- (viii) terminating when said calculated values for NEFFECTIVE, RCH-EFFECTIVE, HAT, and HCT satisfy the target values;
- and
- (xi) adjusting at least one of:
- the placement of the required base stations for the CDMA network, the transmission power, and the network parameters, and returning to step (vi).
Dependencies are inferred from the claim text.