KR100198927B1 - Method for assigning active reservation channel - Google Patents

Abstract

1. TECHNICAL FIELD OF THE INVENTION

Dynamic Reservation Channel Allocation Method in Mobile Communication System

2. The technical problem to be solved by the invention

By dynamically changing and allocating the number of reserved channels according to the change in channel occupancy and the number of handover calls, the present invention aims to provide a dynamic reserved channel allocation method capable of processing a large number of calls compared to a fixed number of reserved channel allocation methods. .

3. Summary of Solution to Invention

If dynamic channel allocation is not being performed, the channel share's random threshold ( Above), the reserved channel number is allocated according to the change of the handover call number and the handover call number being processed, and if the channel allocation is being performed dynamically, the threshold value arbitrarily set by the channel occupancy rate ( If greater than), the number of reserved channels is allocated according to the number of handover calls, the number of handover calls, and the channel occupancy in the process, and the handover call is preferentially processed.

4. Important uses of the invention

Used to allocate reserved channel in mobile communication system.

Description

Dynamic Reservation Channel Allocation Method According to Changes in Channel Occupancy and Handover Calls

The present invention relates to a method for allocating a dynamic reserved channel according to a change in channel occupancy and handover call in a mobile communication system. Particularly, when a call arrives beyond a capacity that can be processed in one cell, the handover call The present invention relates to a dynamic reserved channel allocation method for dynamically changing and allocating a reserved channel number for handover according to a change in channel occupancy and a handover call being processed.

A cellular mobile communication network is composed of small units called cells, and each cell communicates using N radio channels.

When a mobile station (MS) in one cell requests a channel, the base station (BS) that manages the cell allocates a channel if there is an available channel, and rejects it otherwise.

There are two cases where a mobile station requires a channel. That is, it can be divided into a case where a new call request is generated by a mobile station in one cell and a case where a mobile station in another cell requests handover.

In general, the subscriber is much more sensitive to the blocking of the handover call than the blocking of the new call, so it is necessary to assign a channel to the handover call preferentially rather than the new call. In the reserved channel allocation method, some channels (reserved channels) of all channels allocated to the cell are reserved for handover. If the number of available channels is less than or equal to the number of reserved channels, the new call is not allocated to the new call. Assign channels only for. That is, if the number of available channels remaining in the current cell is less than or equal to the reserved channel, the new call is not allocated and is rejected.

1 is a schematic configuration diagram of a base station to which the present invention is applied, and a base station is located between a plurality of base station transceivers 10 and a plurality of base station transceivers 10 and a mobile switch that provide a radio channel to a mobile station. It consists of a base station control unit 20 in charge of the control of the base station.

The base station control unit 20 controls the call and receives a call assigned to the call / channel control block 22 for allocating the radio channel of the base station and the selector and the radio channel designated by the call / channel control block 22 when the call is established. After the link is initialized, the call / channel control block 22 is notified and the call / channel control block 22 is reported to the call / channel control block 22 when the call is released from the mobile station. A plurality of TSB (Transcoding Selection Bank) 23 for canceling the selector under the control of the network and the connection network 21 for providing a communication path between the base station transceiver 10 and the TSB 23 and the call / channel control block 22 It consists of.

When a call arrives and allocates a channel or the call ends and the channel is recovered, the number of available channels in the cell changes. The allocation and retrieval of such a channel is performed under the control of the call / channel control block 22. In this case, the call / channel control block 22 changes and stores radio channel control information so that the changed control information is requested when the next channel is requested. Determine whether to allocate channel.

2 is an explanatory diagram of a method for allocating a reserved channel for prioritizing a conventional handover call, wherein some C radio channels allocated to one cell ( By designating a) as a reserved channel for the handover call only, the handover call is prioritized over the newly generated general call. That is, C- General channels may be allocated to both new and handover calls, but the number of available radio channels remaining in the cell is the number of reserved channels. When less than, radio channels are assigned only to handover calls and new calls are rejected.

Therefore, the number of reserved channels in the conventional reserved channel allocation method Once set by the mobile communication system operator has a fixed value until the system operator is reset according to changes in the system operating environment, there is a problem that can not handle more calls.

Accordingly, the present invention devised to solve the above problems of the prior art, the same service standard (GOS: Grade Of Service) by dynamically changing and allocating the number of reserved channels in accordance with the change in channel occupancy and handover call number It is an object of the present invention to provide a dynamic reserved channel allocation method capable of processing a large number of calls as compared to a fixed number of reserved channel allocation methods.

1 is a schematic configuration diagram of a base station to which the present invention is applied;

2 is an explanatory diagram of a reserved channel allocation method for prioritizing a conventional handover call;

3 is an explanatory diagram of a method for allocating a dynamic reserved channel according to a change in channel occupancy and handover number in a driving state according to the present invention;

4 is an explanatory diagram of a method for allocating a dynamic reserved channel according to a change in channel occupancy and handover call in an operating state according to the present invention;

5 is a flowchart of a method for allocating a dynamic reserved channel according to a change in channel occupancy and handover call according to the present invention.

Looking at the configuration of the present invention for achieving the above object, the present invention is a dynamic reservation channel allocation method according to the change in channel occupancy and handover call applied to the mobile communication system, when the call request is received or the call is terminated A first step of checking occupancy and handover calls and determining if dynamic channel allocation is being performed; If the dynamic channel allocation is not performed in the first step, the threshold value arbitrarily set by the channel occupancy level ( A second step of allocating the number of reserved channels by multiplying the number of handover calls being processed by a function value according to the change of the number of handover calls; If dynamic channel allocation is being performed in the first step, a threshold value arbitrarily set by channel occupancy ( A third step of determining whether or not); And the channel occupancy threshold in the third step ( ) Or less, and terminates dynamic channel allocation, and the channel occupancy is equal to the threshold ( Greater than), the fourth step of allocating the number of reserved channels by multiplying the number of handover calls being processed by a function value according to the number of handover calls and channel occupancy.

Hereinafter, an embodiment of the present invention will be described in detail with reference to FIGS. 3 to 5.

FIG. 3 is an explanatory diagram for explaining a method of allocating a dynamic reserved channel according to a change in channel occupancy and handover calls in a driving state according to the present invention.

Channel occupancy is defined as the ratio of the total number of channels in use to the total number of channels assigned to that cell. For example, if 15 of the 30 channels allocated to a cell are currently in use, the channel occupancy of this cell is 0.5 (or 50%).

In the present invention, the dynamic reservation channel allocation method is driven and how to allocate the number of reserved channels at that time will be described.

Channel Occupancy Threshold When it reaches, it allocates the number of reserved channels according to the number of handover calls being processed.

The number of channels in use of the C radio channels allocated to one cell, that is, end When is reached, the number of channels for handover calls only, depending on the number of handover calls being processed at this time. Allocate

Number of reserved channels for handover calls only Is determined as follows.

= f ( ) = [Number of handover calls in progress ( ) xp ( )]

[A] represents the minimum integer greater than or equal to A. p ( ) It has a different value according to the change of the value, except that 0 ≤ p ( ) ≤ 1). Therefore, when the dynamic channel allocation method is driven, the initial value of the reserved channel number depends on the number of handover calls being processed.

Number of channels driven by dynamic reserved channel allocation method Is set as follows.

only, Is the value of occupancy (eg, 0.9) in which the dynamic reserved channel allocation method is driven. In other words, the share of the channel When it arrives, it starts to allocate a reserved channel for priority processing of the handover call.

4 is an explanatory diagram for explaining a method for allocating a dynamic reserved channel according to a change in channel occupancy and handover call in an operating state according to the present invention.

In the driving state of FIG. 3, the number of calls increases so that the number of available radio channels remaining in the cell is the number of reserved channels. , The number of reserved channels from then on Is dynamically allocated according to channel occupancy rate and handover call number. That is, the number of reserved channels for handover calls only in the following way Allocate

= g ( , u) = [Number of handover calls in progress ( ) xp ( , u)]

Where u represents the channel occupancy rate and [A] represents the minimum integer greater than or equal to A. p ( , u) And u according to the change in the value, except that 0 ≦ p ( , u) ≤ 1). Thus, when the dynamic channel allocation method is already in operation, the number of reserved channels allocated depends on the channel occupancy and the number of handover calls being processed.

Channel share is a random value If it is below, the operation of the dynamic channel allocation method according to the channel occupancy and handover call is terminated. This is because the number of unused channels increases in this case, so that the handover call is not rejected even if it has no priority.

Where any value Is Equals or Set it smaller.

5 is a flowchart illustrating a method for allocating a dynamic reserved channel according to a change in channel occupancy and handover call according to the present invention.

When a call request is received or the call is terminated (100), the channel occupancy rate and handover call number are checked (101). Then, it is determined whether dynamic channel allocation is being performed (102). If dynamic channel allocation is not being performed, the threshold value arbitrarily set by the channel occupancy ( (103).

Channel occupancy is at a threshold ( If less than), processing for a general call request is performed, which is omitted in the present invention. Channel occupancy is at a threshold ( 3), the number of reserved channels is allocated by multiplying the number of handover calls being processed by a function value according to the change in the number of handover calls as shown in Equation (1) of FIG.

In addition, if dynamic channel allocation is currently being performed, a threshold value arbitrarily set by the channel occupancy in order to allocate a reserved channel for the changed channel occupancy and handover call number. (105).

Channel occupancy is at a threshold ( ), The dynamic channel allocation execution is terminated (106), and the channel occupancy is equal to the threshold ( If greater than), the number of reserved channels is allocated by multiplying the number of handover calls being processed by a function value according to the change in handover call number and channel occupancy as shown in Equation (3) of FIG. 4 (107).

The present invention made as described above provides the same service standard while performing the priority processing for the handover call by dynamically changing and allocating the number of reserved channels according to the conversion of the channel occupancy and the handover call number. Compared to a fixed number of reserved channel allocation methods, a large number of calls can be processed, thereby providing a high quality mobile communication service.

The present invention described above is capable of various substitutions, modifications, and changes within the scope without departing from the technical spirit of the present invention for those skilled in the art to which the present invention pertains, and thus is limited to the above-described embodiments and drawings. It is not.

Claims (2)

In the dynamic reservation channel allocation method according to the change of channel occupancy and handover call applied to the mobile communication system, A first step (100 to 102) of checking channel occupancy and handover call number when a call request is received or the call is terminated and determining whether dynamic channel allocation is being performed; If the dynamic channel allocation is not being performed in the first step (100 to 102), the threshold value arbitrarily set by the channel occupancy ( A second step (103, 104) of multiplying the number of reserved channels by multiplying the number of handover calls being processed by a function value according to the change of the number of handover calls; If the dynamic channel allocation is being performed in the first step (100 to 102), the threshold value arbitrarily set by the channel occupancy ( Third step 105 of determining whether or not); And In the third step 105, the channel occupancy is a threshold value ( ) Or less, and terminates dynamic channel allocation, and the channel occupancy is equal to the threshold ( And a fourth step (106, 107) of allocating the number of reserved channels by multiplying the number of handover calls being processed by a function value according to a change in the number of handover calls and channel occupancy. The method of claim 1, A threshold set arbitrarily for the termination of dynamic channel assignment. ), Randomly set thresholds for dynamic channel assignment Dynamic reservation channel allocation method characterized in that less than or equal to).