KR20100062828A - Method and apparatus for controlling quality of service by bandwidth request in wibro systems - Google Patents

Abstract

The present invention relates to an apparatus and method for controlling service QoS through bandwidth request in a portable Internet system.

According to the present invention, when a mobile terminal processes a bandwidth request for initial ranging and uplink data transmission in a mobile Internet system, the bandwidth can be differentiated by varying the bandwidth request processing according to a service access type or a user. And it is a method that can control the QoS for each service in the ranging step.

The present invention can give priority to services requiring real-time and can expect the effect of improving the uplink performance of the overall system.

Description

Apparatus and method for controlling service QoS through bandwidth request in portable Internet system {Method and Apparatus for Controlling Quality of Service by Bandwidth Request in WiBro Systems}

The present invention relates to a method for allocating a band request, and more particularly, to an apparatus and a method for controlling a quality of service (QoS) through a band request ranging process in a portable Internet system.

In the portable Internet system, when the terminal transmits data uplink, the base station requests a band allocation.

The base station finds available resources and allocates uplink resources to the requesting terminal so that the terminal can transmit the uplink data.

The bandwidth request for uplink data transmission is performed by a plurality of UEs through a bandwidth request (BR) ranging in a given time interval.

BR ranging is performed through the CDMA code for BR, and the code can be allocated only when the transmitted code reaches the base station without colliding with codes transmitted by other terminals.

Currently, in the portable Internet system, all terminals attempt to perform BR ranging under the same conditions (that is, no distinction between users).

Each user requests allocation of an uplink in a random manner in a predetermined BR ranging period.

Current uplink band request schemes are subject to the same conditions regardless of the type of service or service state used by all users.

Services generated according to the environment of the terminal include a real-time service that requires real-time and a non-real-time service that does not require real-time.

In the current uplink bandwidth request scheme, since all users perform BR ranging under the same conditions, there is a problem in that priority control that can be adjusted for each service type or user used in the BR ranging process cannot be performed.

In order to solve such a problem, the present invention is to provide an apparatus and method for controlling the service QoS through the bandwidth request in the portable Internet system.

According to an aspect of the present invention, there is provided a service QoS control method according to an aspect of the present invention. (A) A list of access allowance probabilities from the base station, wherein the list of access allowance probabilities includes access permission probabilities corresponding to loads of service access types. Receiving; (b) When there is uplink traffic to be transmitted to the base station, before the band allocation ranging is sent to the base station, the access allowance probability value of the service currently being used is obtained from the received access allowance probability list and the obtained access allowance probability value and Determining whether to attempt a band allocation request by comparing result values of a random function; And (c) performing band allocation ranging to the base station if it is determined that the band allocation request is attempted to access.

According to an aspect of the present invention, there is provided a service QoS control method comprising the steps of: (a) receiving a band allocation ranging from a mobile station in a cell and measuring a load for each service access type; (b) generating an access allowance probability list by individually assigning an access allowance value for each service access type based on the measured load of each service access type to perform load control for each service; And (c) broadcasting the generated access allowance list in a message to a mobile station in the cell.

An apparatus for controlling service QoS according to an aspect of the present invention includes an uplink traffic processing unit for recognizing and buffering data to be transmitted to a base station, requesting uplink band allocation, and transmitting uplink data by the allocated band; A band allocation ranging processor for allocating a predetermined band according to a band allocation request received from the uplink traffic processor and performing band allocation ranging by the allocated band; And requesting whether band allocation ranging is performed from the band allocation ranging processing unit, obtains an access permission probability value of a service currently being used from an access allowance probability list received from the base station, and associates a result of a random function to allocate the band allocation. And an access decision performing unit for determining whether to perform ranging, and wherein the band allocation ranging processing unit waits until an access decision is made for the execution of the band allocation ranging in the access decision performing unit, Band allocation ranging is performed to the base station.

According to an aspect of the present invention, an apparatus for controlling QoS of a service includes: a service load measurement unit configured to measure a load of band allocation ranging requested by mobile terminals in a cell and classify the measured load by service access type; And a service access allowance probability of generating an access allowance probability list by differently assigning an access allowance value according to loads classified by the service access types and broadcasting a message including the generated access allowance list to mobile terminals in the cell. It includes an operation unit.

According to the above-described configuration, the present invention can give priority to a service requiring real time and can expect an effect of increasing the uplink performance of the overall system.

According to the present invention, the uplink band allocation can be subdivided according to service functions or characteristics, and the access control probability values can be expected to be prioritized for each service by allocating differential access allowance values to each of them.

DETAILED DESCRIPTION Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art may easily implement the present invention. As those skilled in the art would realize, the described embodiments may be modified in various different ways, all without departing from the spirit or scope of the present invention. In the drawings, parts irrelevant to the description are omitted in order to clearly describe the present invention, and like reference numerals designate like parts throughout the specification.

Throughout the specification, when a part is said to "include" a certain component, it means that it can further include other components, without excluding other components unless specifically stated otherwise. In addition, the terms “… unit”, “… unit”, “module”, “block”, etc. described in the specification mean a unit that processes at least one function or operation, which is hardware or software or a combination of hardware and software. It can be implemented as.

1 is a diagram showing the overall configuration of a band request allocation system through a band request in a portable Internet system according to an embodiment of the present invention.

The band request allocation system according to an embodiment of the present invention includes a mobile terminal 100 and a base station 200.

The mobile terminal 100 according to the embodiment of the present invention includes an uplink traffic processor 110, a BR ranging processor 120, and an access decision performer 130.

The uplink traffic processing unit 110 recognizes and buffers data to be transmitted from the mobile station 100 to the base station 200, requests the uplink band allocation to the BR ranging processing unit 120, and the BR ranging processing unit 120 Uplink data is transmitted as much as the bandwidth allocated from the controller and the buffer for the uplink data is adjusted.

When the BR ranging processing unit 120 receives a band allocation request from the uplink traffic processing unit 110, the BR ranging processing unit 120 allocates a predetermined band to the uplink traffic processing unit 110 according to the bandwidth allocation request, and performs BR ranging by the corresponding bandwidth allocation size. Function to transmit to (200).

The BR ranging processor 120 requests the access decision performing unit 130 to perform BR ranging attempts and waits until an access decision is made, and then performs BR ranging.

When the request for performing the BR ranging attempt is received from the BR ranging processor 120, the access decision performing unit 130 obtains an access permission probability value of the service currently being used from the access permission probability list received from the base station 200. A BR ranging attempt is determined by associating an access probability value with a random function result.

The base station 200 according to the embodiment of the present invention includes a service load measurement unit 210 and a service access allowance calculator 220.

The service load measurement unit 210 measures the load of the BR ranging requested by the mobile terminals 100 in the cell and classifies the measured load of the BR ranging by service type.

The service access acceptance probability calculator 220 receives the load of BR ranging measured by the service load measurement unit 210, obtains a load for each service access type based on the load, and calculates an access allowance value using the load for each service access type. Will be adjusted.

The service access acceptance probability calculation unit 220 constructs an access admission probability list corresponding to the load for each service access type to minimize the time delay of the real-time service, and whenever there is a newly configured access allowance list, an uplink channel descriptor (Uplink) Channel Descriptor (hereinafter referred to as 'UCD') message is broadcast to the mobile terminal 100 in the cell.

2 is a view for explaining a band request and a band allocation method between the mobile station 100 and the base station 200 according to the first embodiment of the present invention.

The base station 200 measures the BR ranging load requested by the mobile terminals 100 located in the cell, and generates an access grant probability list by allocating an access grant probability value for each service access type based on the measured BR ranging load. Here, the access allowability list means access allowance values for each service access type.

That is, the base station 200 differentially allocates an access probability value according to a service access type. In this case, the access permission probability value means that the mobile station 100 tries differently according to the service access type that is using the bandwidth allocation request attempt.

If the mobile terminal 100 has a large access allowance value, an opportunity for attempting BR ranging increases. If the mobile terminal 100 has a small access allowance value, an opportunity for attempting BR ranging decreases.

The service type assigns access probability values differently according to the priority of the service. The number of priority levels indicating the degree of priority may be variable or fixed depending on the communication environment.

For example, when operating with three service access types, the following [Table 1].

Access type
Real-Time degree Access Probability A
height Pa B
middle Pb
C
lowness Pc

The base station 200 includes the generated service access allowance probability list in the UCD message and transmits it to the mobile terminals 100 in the cell (S100).

The mobile terminal 100 recognizes the access permission probability value for each service access type in the UCD message broadcast from the base station 200 (S102).

When there is traffic to be transmitted on the uplink, the mobile terminal 100 determines whether to attempt BR ranging by using an access permission probability value before sending BR ranging (uplink allocation request) to the base station 200 (S104).

The mobile terminal 100 calculates a random value using a random function, compares the calculated random value with an access allowance value, and determines whether to attempt BR ranging according to the result (S104).

When the mobile station 100 determines the access for BR ranging, it generates a BR code, transmits it to the base station 200, and receives code allocation information from the base station 200 (S106 and S108).

Subsequently, the mobile terminal 100 generates a BR header, transmits the BR header to the base station 200, and receives uplink resource allocation information (UL-MAP) from the base station 200 (S110 and S112).

When receiving the uplink resource allocation information from the base station 200, the mobile terminal 100 transmits uplink data to the base station 200 (S114).

3 is a diagram illustrating a band request and a band allocation method between a mobile station 100 and a base station 200 according to a second embodiment of the present invention.

The base station 200 measures the load of BR ranging requested by the mobile terminals 100 in the cell and classifies the measured load by service access type (S200).

The base station 200 generates an access permission probability list by differently assigning an access permission probability value according to loads classified by service access types (S202).

Subsequently, the base station 200 generates a DL / UL-MAP Information Element (UC) or UCD message including the generated access allowance probability list and broadcasts it to the mobile terminals 100 in the cell (S204).

When the base station 200 first transmits an access permission probability value for each service access type, the base station 200 allocates a predetermined initial value and transmits the predetermined initial value to the mobile terminals 100 in the cell.

The mobile terminal 100 receives the access allowance probability list broadcasted from the base station 200 (S206), and when the uplink traffic to be transmitted to the base station 200 occurs, performs a random function to result in a random function. To generate (S208).

The mobile terminal 100 obtains an access probability value of a service currently in use from the received access allowance list, and compares the access allowance value with a result of a random function, when the access probability is greater than or equal to the result of the random function. BR ranging is performed to the base station 200, and if it is small, BR ranging is not performed (S210 and S212).

Therefore, the band allocation ranging processor of the mobile terminal 100 increases the access chance probability of the service currently being used than the result of the random function. The chance of attempting allocation ranging is reduced.

As described above, in the case of the high-priority real-time service access type of the base station 200, the service access allowance probability 220 increases the real-time service access allowance probability value and increases the load due to the heavy load collision. In the case of a service access type having low real-time property, the access allowance value is lowered.

The base station 200 broadcasts the newly changed access allowance list for each service access type to the mobile terminals 100 in the cell through a DL / UL-MAP IE or UCD message.

The mobile terminals 100 in the cell update their ranging access rules with the received access allowance list and attempt BR ranging with new access allowance values for uplink traffic.

This results in increased BR ranging opportunities for real-time services and reduced BR ranging opportunities for non-real-time services, providing QoS for real-time services and enabling load control in the ranging phase. .

 The embodiments of the present invention described above are not implemented only by the apparatus and / or method, but may be implemented through a program for realizing a function corresponding to the configuration of the embodiments of the present invention, a recording medium on which the program is recorded, and the like. Such implementations may be readily implemented by those skilled in the art from the description of the above-described embodiments.

Although the embodiments of the present invention have been described in detail above, the scope of the present invention is not limited thereto, and various modifications and improvements of those skilled in the art using the basic concepts of the present invention defined in the following claims are also provided. It belongs to the scope of rights.

1 is a diagram showing the overall configuration of a band request allocation system through a band request in a portable Internet system according to an embodiment of the present invention.

2 is a view for explaining a band request and a band allocation method between a mobile station and a base station according to the first embodiment of the present invention.

3 is a diagram illustrating a band request and a band allocation method between a mobile station and a base station according to a second embodiment of the present invention.

Claims (8)

In the service QoS control method through the band request to the base station, (a) receiving an access grant probability list from the base station, the access grant probability list including access grant probability values corresponding to a load for each service access type; (b) When there is uplink traffic to be transmitted to the base station, before the band allocation ranging is sent to the base station, the access allowance probability value of the service currently being used is obtained from the received access allowance probability list and the obtained access allowance probability value and Determining whether to attempt a band allocation request by comparing result values of a random function; And (c) performing band allocation ranging to the base station when it is determined whether the band allocation request is attempted to access; Service QoS control method comprising a. According to claim 1, In step (b), Performing the band allocation ranging to the base station when the obtained access permission probability value is greater than or equal to a result of the random function; Service QoS control method comprising a. In the service QoS control method through the band request, (a) receiving a band allocation ranging from a mobile terminal in a cell and measuring a load for each service access type; (b) generating an access allowance probability list by individually assigning an access allowance value for each service access type based on the measured load of each service access type to perform load control for each service; And (c) broadcasting the generated access allowance list in a message to a mobile station in the cell; Service QoS control method comprising a. The method of claim 3, The mobile station receives the newly changed access allowance probability list from the base station, changes its ranging access rule, and attempts the band allocation ranging with a new access allowance probability value. An apparatus for controlling service QoS through bandwidth request, the apparatus comprising: An uplink traffic processing unit for recognizing and buffering data to be transmitted to the base station and requesting uplink band allocation to transmit uplink data by the allocated band; A band allocation ranging processor for allocating a predetermined band according to a band allocation request received from the uplink traffic processor and performing band allocation ranging by the allocated band; And When the band allocation ranging processor requests whether to perform band allocation ranging, the access allocation probability value of the service currently being used is obtained from the access allowance probability list received from the base station, and the result of the random function is correlated with the band allocation ranging. An access decision performing unit for determining whether to enforce the, The band allocation ranging processing unit performs the band allocation ranging to the base station when the access decision performing unit waits until an access decision is made for the execution of the band allocation ranging. QoS control device. 6. The method of claim 5, The band allocation ranging processor is configured to increase the chance of attempting the band allocation ranging as the access probability value of the service currently being used is greater than the result of the random function, and as the band allocation range becomes smaller than the result of the random function. Service QoS control device, characterized in that the chance of attempting gong is reduced. An apparatus for controlling service QoS through bandwidth request, the apparatus comprising: A service load measurement unit for measuring a load of band allocation ranging requested by mobile terminals in a cell and classifying the measured load by service access type; And A service access allowance probability calculator which generates an access allowance probability list by differently assigning access allowance values according to loads classified by the service access types and broadcasts a message including the generated access allowance list to mobile terminals in the cell. Service QoS control apparatus comprising a. The method of claim 7, wherein The service access allowance probability calculator is configured to change the service access type into a first access allowance probability value that increases the access allowance probability value when the service access type is a high-priority real-time service access type, and the non-real time service access type having a low priority. And a second access permission probability value lower than the first access permission probability value.

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