KR20000051751A - Method for calculating the forward link capacity in simultaneously service mobile and fixed subscribers - Google Patents

Abstract

PURPOSE: A method of calculating volume of forward link for synchronous service for mobile telephone subscriber and fixed telephone subscriber is provided to calculate the volume of forward link subscriber in CDMA(Code Division Multiple Access) mobile telecommunication system. CONSTITUTION: A method of calculating volume of forward link for synchronous service for mobile telephone subscriber and fixed telephone subscriber comprises the steps of; determining electronic power rate for each transmitting channel to satisfy the Eb/No value demanded in receiver of base station, determining the range of forward base station of CDMA mobile telecommunication system by the strength of pilot channel. For calculating the volume by using the rate of electronic power of each channel, it is comprised of the following steps; calculating the electronic power rate which allocates for each channel when serving for both mobile telephone subscriber and fixed telephone subscriber, calculating the rate of the number of occupied channel by mobile telephone subscriber, calculating the total value of subscribers.

Description

Capacity calculation method of forward link in case of simultaneous service for mobile subscriber and fixed subscriber {METHOD FOR CALCULATING THE FORWARD LINK CAPACITY IN SIMULTANEOUSLY SERVICE MOBILE AND FIXED SUBSCRIBERS}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a modern mobile communication system that enables communication using a wireless link, and in particular, Code Division Multiple Access (CDMA) mobile service that can provide services to mobile subscribers and fixed subscribers. The present invention relates to a capacity calculation method of a forward link in case of simultaneous service for mobile subscriber and fixed subscriber for calculating subscriber capacity of a forward link in a communication system.

In the conventional mobile communication system, the subscriber capacity is calculated for the service to the mobile subscriber. In addition, even in the case of targeting the fixed subscribers, the subscriber capacity was calculated to serve only the fixed subscribers. Both of these capacity calculation methods were to calculate the service for mobile subscribers or fixed subscribers. That is, until now, one base station has been trying to provide a service for calculating a capacity for only a part of subscribers among mobile subscribers or fixed subscribers or improve the calculation method.

However, there is a need for a system that satisfies not only the service for fixed subscribers but also the service for some mobile subscribers in countries where communication network construction is insufficient for areas such as Russia and China, and code division multiple access (CDMA). There is a growing need for a hybrid scheme that can serve both fixed and mobile stations by applying a system similar to a wireless local loop (WLL).

As such, the conventional subscriber capacity calculation method has a problem in that it does not satisfy the requirements of the system for satisfying simultaneous services for fixed subscribers as well as services for mobile subscribers.

The present invention was devised to solve the problems of the prior art operating as described above, and the capacity calculation method of the forward link in the case of simultaneous services for mobile subscribers and fixed subscribers to simultaneously meet the service for mobile subscribers and fixed subscribers The purpose is to provide.

1 is a flowchart illustrating an allocation of power allocated to a traffic channel according to a traffic channel ratio of a mobile subscriber and a fixed subscriber.

2 is a capacity calculation flowchart using a power ratio for each channel according to the present invention.

Embodiment of the method for calculating the capacity of the forward link in the case of the simultaneous service for the mobile subscriber and the fixed subscriber according to the present invention, which is designed to achieve the above object, is to calculate the power allocated to the traffic channel to the traffic of the mobile subscriber and the fixed subscriber. According to the channel ratio,

Determining, by the base station, a power ratio for a pilot channel, a paging channel, and a synchronization signal character channel transmitted to satisfy an Eb / No value required by a receiver;

After determining the power ratio, the step of determining the radius of the forward base station of the CDMA mobile communication system as the strength of the pilot channel.

In an embodiment of the present invention, the step of determining the power ratios for the pilot channel, the paging channel, and the synchronization signal character channel includes determining and using a power ratio capable of both a service for a mobile subscriber and a service for a fixed subscriber. ,

The determining and using the power ratio may include calculating a power ratio for a pilot channel, a paging channel, and a synchronization signal character channel, and calculating the power ratio based on a service for a mobile subscriber having a larger ratio of power allocated between the mobile subscriber and the fixed subscriber. Include.

Another embodiment of the capacity calculation method of the forward link in the case of simultaneous service for mobile subscriber and fixed subscriber according to the present invention, in calculating the capacity using the power ratio of each channel,

Obtaining a power ratio allocated to each channel when the mobile subscriber and the fixed subscriber simultaneously service;

Obtaining a ratio of the number of channels occupied by mobile subscribers to the number of channels occupied by fixed subscribers by obtaining the allocated power ratio; And

The total subscriber capacity is calculated by calculating the ratio of the number of occupied channels.

Hereinafter, described in detail with reference to the accompanying drawings, preferred embodiments of the present invention.

The present invention relates to a case of allocating power allocated to a traffic channel according to the case of simultaneously serving a mobile subscriber and a fixed subscriber according to the traffic channel ratio of the mobile subscriber and the fixed subscriber, and a case of simultaneously serving the mobile subscriber and the fixed subscriber. It is composed of the part that calculates the capacity by using the power ratio of each channel. The operation and effects thereof will be described in detail with reference to FIGS. 1 to 2 as follows.

1 is a flowchart illustrating an allocation of power allocated to a traffic channel according to a traffic channel ratio of a mobile subscriber and a fixed subscriber, and FIG. 2 is a flowchart of a capacity calculation using a power ratio for each channel according to the present invention. There are four types of channels in the forward link of a CDMA mobile communication system: a pilot channel, a sync signal sync channel, a paging channel, and a traffic channel. In order to calculate the capacity for serving the mobile subscriber and the fixed subscriber at the same time, the concept of calculating the radius of the base station was introduced. The determination of the forward base station radius of the CDMA mobile communication system is determined by the strength of the pilot channel. This is followed by determining the power ratio for each channel transmitted from the base station to satisfy the Eb / No value required at the receiver.

In calculating the capacity, the ratio of power allocated to pilot, paging, and sync signal character channel should be both available for mobile subscribers and for fixed subscribers. Therefore, the ratio of power allocated between each mobile subscriber and the fixed subscriber is calculated based on the service for the mobile subscriber.

The capacity calculation method when mixing mobile subscriber and fixed subscriber service is as follows. First, the ratio of power allocated to each channel is calculated for each mobile subscriber only service and a fixed subscriber only service. The power ratio for each channel is determined by a base station output, transmission loss, an orthogonal factor between each channel, and a value such as Eb / No or Ec / It required between channels.

And, if the mobile subscriber and the fixed subscriber at the same time service capacity calculation method is as follows. The total power transmitted from the base station is composed of power allocated to pilot, paging, and sync signal character channels, power allocated to total mobile subscribers, and power allocated to total fixed subscribers. The total subscriber capacity according to the channel ratio is calculated by setting the ratio of the number of occupied channels by mobile subscribers and the number of occupied channels by fixed subscribers to Y. In addition, the total subscriber capacity is calculated from the sum of the channel by the mobile subscriber and the channel by the fixed subscriber.

The bar described above is represented by the following formula.

: Number of occupied channels by mobile subscriber

: Number of occupied channels by fixed subscriber

∵

here,

Negative active factor

: Pilot Channel Power Allocation Ratio

Sync Channel Power Allocation Ratio

: Paging Channel Power Allocation Ratio

Traffic Channel Power Allocation Ratio

: Traffic Channel Power Allocation Ratio at Average Point

Referring to the above equation, the overall flow is as follows.

In allocating the power allocated to the traffic channel according to the traffic channel ratio of the mobile subscriber and the fixed subscriber, the base station determines the power ratio for each channel transmitted to satisfy the Eb / No value required by the receiver (s1), and the power ratio. After determining, the radius of the forward base station of the CDMA mobile communication system is determined as the strength of the pilot channel (s2).

At this time, in the step (s1), the power costs for the pilot channel, the paging channel, and the synchronous signal character channel are determined and used for the mobile subscriber service and the fixed power subscriber service. Calculation is based on the service for the mobile subscriber with a larger ratio of power allocated between the two subscribers.

In calculating the capacity using the power ratio for each channel, the power ratio allocated to each channel when the mobile subscriber and the fixed subscriber simultaneously service is calculated (s11). The ratio of the allocated power to the occupied channel by the mobile subscriber and the occupied channel by the fixed subscriber is obtained (s12). The total subscriber capacity is then calculated by calculating the ratio of occupied channels (s13).

As described in detail above, the present invention has an effect of enabling simultaneous service by request for simultaneous acceptance for mobile subscribers and fixed subscribers.

Claims (4)

In allocating the power allocated to the traffic channel according to the traffic channel ratio of the mobile subscriber and the fixed subscriber, Determining, by the base station, a power ratio for each channel transmitted to satisfy an Eb / No value required at the receiver; And determining the forward base station radius of the CDMA mobile communication system as the strength of the pilot channel after the power ratio is determined. In case of simultaneous service for the mobile subscriber and the fixed subscriber, the capacity of the forward link is calculated. The method of claim 1, wherein the determining of the power ratios for the pilot channel, the paging channel, and the synchronization signal character channel comprises determining and using a power ratio capable of both a service for a mobile subscriber and a service for a fixed subscriber. Capacity calculation method for forward link in case of simultaneous service for mobile subscriber and fixed subscriber. The method of claim 2, wherein the determining and using the power ratio comprises: setting a power ratio for a pilot channel, a paging channel, and a synchronization signal character channel to provide a service for a mobile subscriber having a larger ratio of power allocated between the mobile subscriber and the fixed subscriber. Capacity calculation method of the forward link in the case of simultaneous services for mobile subscribers and fixed subscribers, comprising the step of calculating as a reference. In calculating the capacity using the power ratio of each channel, Obtaining a power ratio allocated to each channel when the mobile subscriber and the fixed subscriber simultaneously service; Obtaining a ratio of the number of channels occupied by mobile subscribers to the number of channels occupied by fixed subscribers by obtaining the allocated power ratio; And And calculating the total subscriber capacity by calculating the ratio of the occupied channels. The capacity calculation method of the forward link in case of simultaneous service for mobile subscribers and fixed subscribers.