CN100417292C - Adjustment Method of Common Channel Bandwidth - Google Patents

Abstract

The invention discloses a method for adjusting the bandwidth of a public channel: the throughput rate of the public channel of a community is measured in real time within a preset public channel statistical period, and the cumulative time length of congestion when the throughput rate reaches the preset congestion threshold and the throughput rate is lower than The idle cumulative duration of the preset idle threshold, the congestion threshold is greater than the idle threshold, at the end of the common channel statistical period, if the accumulated congestion duration reaches the preset first limited time, then increase the bandwidth of the common channel; if idle When the cumulative duration reaches the preset second limited time, the bandwidth of the public channel is reduced, wherein the sum of the first limited time and the second limited time is greater than the statistical period of the public channel, and the first and second limited times are both less than or equal to the public channel Channel statistics period. The invention adjusts the bandwidth of the public channel in real time according to the actual throughput of the public channel of the IUB interface, reduces the waste of bandwidth resources of the public channel, and improves the utilization rate of the bandwidth and the access rate of users.

Description

Adjustment Method of Common Channel Bandwidth

technical field

The invention relates to a common channel of a wireless network, in particular to a method for adjusting the bandwidth of the common channel.

Background technique

As shown in Figure 1, in a CDMA (Code Division Multiple Addressing, Code Division Multiple Access) system, the logical interface between the RNC (Radio Network Controller, radio network controller) and the Node B is the IUB interface, and the IUB interface is the RNC and The common channel data flow and the dedicated channel data flow between Node Bs provide transmission channels.

When the RNC establishes a cell, it needs to reserve a certain IUB interface bandwidth as the public channel of the cell. The public channel of the IUB interface provides a channel for the mobile terminal to interact with the network for signaling and data during the process of establishing a dedicated connection. The IUB interface The common channels in the network mainly include FACH (Forward Access Channel, forward access channel), PCH (Paging Channel, paging channel) and RACH (Random Access Channel, random access channel). Among them, FACH and PCH are downlink common channels, FACH is used to send control information to terminals in a given cell; PCH is used to send data related to the paging process; RACH is an uplink common channel, used to send control information from terminals. After the dedicated connection is established, the mobile terminal uses a DCH (Dedicated Channel, dedicated channel) to communicate with the network, and no longer uses a public channel.

At present, when the cell is established, a fixed bandwidth has been reserved as the common channel of the IUB interface. After the cell is established, the bandwidth of the common channel of the IUB interface cannot be adjusted. This fixed bandwidth allocation method has the following disadvantages:

1. In some residential areas where the proportion of high-end users is large but the total number of users is small, when high-end users enjoy high-speed data services, the problem of service establishment failure may occur due to the limited bandwidth resources of the IUB interface, but at the same time due to the overall The number of users is small, and some public channel bandwidth resources are idle but unusable;

2. In some cells where the number of users grows rapidly, some users may not be able to access due to insufficient public channel bandwidth during peak hours;

3. In some areas where transmission resources are extremely tight, when the number of users is small at the initial stage of network establishment, the fixed public channel bandwidth allocated by the system will occupy redundant transmission resources, resulting in increased operating costs.

Contents of the invention

The invention provides a method for adjusting the bandwidth of the common channel to solve the problem in the prior art that the bandwidth of the common channel cannot be adjusted according to the actual use of the common channel of the IUB interface after the cell is established.

The present invention adopts following technical scheme:

A method for adjusting the bandwidth of a public channel, comprising the steps of:

Measure the throughput rate of the public channel of the cell in real time within the preset public channel statistical cycle, and record the cumulative time of congestion when the throughput reaches the preset congestion threshold and the cumulative idle time when the throughput is lower than the preset idle threshold, wherein, the congestion threshold is greater than the idle threshold;

At the end of the common channel statistics period, if the accumulated time of congestion reaches the preset first limited time, then increase the bandwidth of the common channel; if the accumulated idle time reaches the preset second limited time, then reduce the bandwidth of the common channel, wherein , the sum of the first limited time and the second limited time is greater than the common channel statistical period, and both the first limited time and the second limited time are less than or equal to the common channel statistical period.

When the accumulated time of congestion reaches the first limited time, the bandwidth of the public channel is increased according to the set adjustment step; when the accumulated idle time reaches the second limited time, the bandwidth of the public channel is reduced according to the set adjustment step.

The adjustment step size is an integer multiple of 1 kbps.

The adjustment of the common channel bandwidth is performed by means of cell reconstruction or in the process of common channel reconfiguration.

The adjustment of the bandwidth of the common channel is performed when there is no user access.

Adopting the technical scheme of the present invention has the following beneficial effects:

The invention adjusts the bandwidth of the common channel in real time according to the actual throughput of the common channel of the IUB interface, increases the bandwidth of the common channel when the common channel is congested, and reduces the bandwidth of the common channel when the common channel is idle, thereby effectively reducing the bandwidth of the common channel The waste of resources increases the utilization rate of bandwidth and the access rate of users.

Description of drawings

Fig. 1 is a schematic structural diagram of a WCDMA network;

Fig. 2 is a flow chart of adjusting the common channel bandwidth in the present invention.

Detailed ways

The present invention will be described in further detail below in conjunction with the accompanying drawings.

The method of the present invention adjusts the bandwidth of the common channel in real time according to the actual throughput of the common channel of the community, increases the bandwidth of the common channel when the common channel is congested, and reduces the bandwidth of the common channel when the common channel is idle, thereby improving the bandwidth of the common channel. The utilization rate of bandwidth resources and the access rate of users.

The specific method of public channel bandwidth adjustment is shown in Figure 2, including the following steps:

S1. Setting measurement parameters and thresholds of common channels;

Firstly, the network maintenance personnel set the common channel statistics period, common channel congestion threshold, public channel idle threshold, accumulated congestion time threshold, accumulated idle time threshold, adjustment step size and adjustment timing on the RNC. When setting the above parameters, the congestion threshold of the public channel is greater than the idle threshold of the public channel, the cumulative time threshold of congestion is less than or equal to the public channel statistical period, and the cumulative idle time threshold is less than or equal to the public channel statistical period, and the adjustment step is generally a multiple of 1kbps. In order to avoid the situation that the accumulated congestion duration threshold and the accumulated idle duration threshold are met at the same time, the sum of the accumulated congestion duration threshold and the accumulated idle duration threshold should be set to be greater than the public channel statistical period. In order to avoid affecting the normal use of the network by users, the adjustment timing is generally Set the time when there is no user access in the cell.

S2. Measure the throughput rate of the public channel in real time, and record the accumulated time of congestion and the accumulated time of idle respectively;

During the common channel statistical period, RNC measures the throughput rate of the common channel of the cell in real time, and records the cumulative time when the throughput reaches the congestion threshold or is lower than the idle threshold in a statistical period, and uses the system internal variables congestion cumulative duration and idle cumulative time respectively The duration is recorded.

S3. Respectively judge whether the accumulated time of congestion reaches the accumulated time threshold of congestion, and whether the accumulated time of idleness reaches the accumulated time threshold of idle time;

At the end of the common channel statistics period, the RNC compares the recorded accumulated common channel congestion time with the preset accumulated congestion time threshold, and compares the recorded accumulated common channel idle time with the preset idle accumulated time threshold, if If the accumulated time of congestion reaches the threshold of accumulated time of congestion, then step S4 is performed; if the accumulated time of idleness reaches the threshold of accumulated time of idleness, then step S5 is performed; if neither is satisfied, the bandwidth of the common channel is not adjusted. After the comparison is over, set the accumulated idle duration and the accumulated congestion duration of the internal variables of the system to zero.

S4, increasing the common channel bandwidth;

At the pre-set common channel adjustment timing, that is, when there is no user access in the cell, the common channel of the cell is adjusted, and the bandwidth of the common channel is increased according to the preset step size. The bandwidth adjustment can be carried out by means of cell reconstruction or in the Performed during common channel reconfiguration. After the bandwidth adjustment is completed, the maintenance terminal of the system will notify the user of the change of the public channel bandwidth and the time and range of bandwidth adjustment in the form of an alarm, and continue the public channel measurement.

S5, reducing the common channel bandwidth;

At the pre-set common channel adjustment timing, that is, when there is no user access in the cell, the common channel of the cell is adjusted, and the common channel bandwidth is reduced according to the preset step size. The bandwidth adjustment can be carried out by means of cell reconstruction or in Performed during public channel reconfiguration. After the bandwidth adjustment is completed, the maintenance terminal of the system will notify the user of the change of the public channel bandwidth and the time and range of bandwidth adjustment in the form of an alarm, and continue the public channel measurement.

In the above step S4 and step S5, the adjustment of the public channel bandwidth is done by the system itself, and the system can also use the alarm method to inform the user of the time when the system public channel is congested and the suggestion for public channel adjustment. Use the maintenance terminal to adjust the bandwidth parameters of the common channel of the cell.

The present invention is described above only with preferred embodiments, and those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalent technologies, the present invention also intends to include these modifications and variations.

Claims (5)

1. an adjustment method of common channel bandwidth, is characterized in that, comprises steps: Measure the throughput rate of the public channel of the cell in real time within the preset public channel statistical cycle, and record the cumulative time of congestion when the throughput reaches the preset congestion threshold and the cumulative idle time when the throughput is lower than the preset idle threshold, wherein, the congestion threshold is greater than the idle threshold; At the end of the common channel statistics period, if the accumulated time of congestion reaches the preset first limited time, then increase the bandwidth of the common channel; if the accumulated idle time reaches the preset second limited time, then reduce the bandwidth of the common channel, wherein , the sum of the first limited time and the second limited time is greater than the common channel statistical period, and both the first limited time and the second limited time are less than or equal to the common channel statistical period. 2. The adjustment method of public channel bandwidth according to claim 1, characterized in that, when the accumulated time of congestion reaches the first limited time, the bandwidth of the public channel is increased according to the set adjustment step; when the accumulated time of idle reaches the first time limit 2. When the time is limited, reduce the bandwidth of the public channel according to the set adjustment step size. 3. the adjustment method of public channel bandwidth according to claim 2, is characterized in that, described adjustment step size is the integral multiple of 1kbps. 4. The method for adjusting the bandwidth of the common channel according to claim 1, wherein the adjustment of the bandwidth of the common channel is carried out by means of cell reconstruction or during the reconfiguration process of the common channel. 5. The method for adjusting the common channel bandwidth according to claim 1 or 4, characterized in that the adjustment of the common channel bandwidth is performed when there is no user access.

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