WO2008011779A1

WO2008011779A1 - Method and device for adjusting the air interface paging channel and access channel in communication system

Info

Publication number: WO2008011779A1
Application number: PCT/CN2007/001255
Authority: WO
Inventors: Shengqiang Yang
Original assignee: Huawei Technologies Co., Ltd.
Priority date: 2006-07-18
Filing date: 2007-04-17
Publication date: 2008-01-31
Also published as: CN1901741A; CN1901741B

Abstract

The present invention belongs to the communication field, and a method for adjusting the paging channel in communication system is disclosed, and the method comprises: obtaining the current paging channel load information of the cell carrier frequency; performing paging channel adjustment decision according to the obtained current paging channel load information, if the decision result is that the cell carrier frequency needs to increase the paging channel number, increasing the paging channel number of the cell carrier frequency, if the decision result is that the cell carrier frequency needs to decrease the paging channel number, decreasing the paging channel number of the cell carrier frequency. A device for realizing the wireless air interface paging channel adjustment in communication system, and a method and a device for realizing the wireless air interface access channel adjustment in communication system are also disclosed. With the present invention, we can increase or decrease adaptively the corresponding channel number according to the current paging channel load or the access channel load of the cell carrier frequency, thereby we can deal with the sporadic paging storm or the access quantity increased suddenly.

Description

Method and device for adjusting wireless air interface paging channel and access channel in communication system The application is submitted to the Chinese Patent Office on July 18, 2006, and the application number is 200610061721.9, and the invention name is "Wireless air interface paging channel in CDMA system. The priority of the Chinese Patent Application, which is incorporated herein by reference.

Technical field

The present invention belongs to the field of communication technologies, and in particular, to a method and a device for adjusting a radio air interface paging channel and an access channel.

Background technique

CDMA (Code Division Multiple Access) The 2000 IX system is currently a major communication system, and its architecture is shown in Figure 1. Among them, BTS11 is a base station transceiver (Base Station Transceiver), BSC/PCF12 is a base station controller/packet control function (Base Station Controller/Packet Control Function), and MSC/VLR13 is a mobile switch/visit location register (Mobile Switching Center/ Visitor Location Register ) , PDSN/FA14 is Packet Data Serving Node/Foreign Agent, SMC 16 is Short Message Center, and HLR/AC15 is Home Location Register/Authentication Home Location Register/Authentication Center, HA17 is the Home Agent, RADIUS 18 is the Remote Authentication Dial In User Service Server, and RADIUS 18 is mainly used for authentication, authorization, and accounting. fee.

In the CDMA 2000 IX system, the forward common channel generally has a pilot channel, a synchronization channel, and a paging channel, and the reverse common channel has an access channel. Each cell carrier frequency can be configured with up to 7 paging channels. Generally, the CDMA system running on the network only configures one paging channel for each cell carrier frequency. If there are too many paging channel configurations, the number of corresponding traffic channels will decrease, which in turn will consume too much processing power of the traffic channel, thereby reducing system capacity.

In the CDMA 2000 IX system, the paging channel transmits information from the base station to the mobile station, and there are many paging-type messages carried thereon. It includes overall messages, paging request messages, channel assignment messages, command messages, public channel unique queries, message waiting notifications, and short messages.

At present, short message service is the preferred communication method for mobile users due to its low price and convenient use. Especially in the case of low support, short message traffic is very huge. On the other hand, operators have developed many short messages based on attracting users and increasing profits. Value-added services, such as stock markets, weather stations, traffic information desks As well as broadcast short message services such as advertisements, these value-added services are also increasing the amount of short message traffic. The short message service belongs to the burst service. In severe cases, the short message traffic far exceeds the paging channel processing capability of the base station, which leads to a large number of short message service failures and overload of the base station, causing a paging storm or a short message storm. A serious overload of the base station will also affect the establishment of other services.

In the case of a paging storm or a short message storm, BSS and BSC BSS (Base Station) are currently included.

Subsystem, base station subsystem) uses traffic control and congestion control for traffic flow management, and prevents system performance from deteriorating by discarding messages when the base station is overloaded. Due to the overload of the base station, a large amount of messages are discarded, resulting in a sharp decrease in the service success rate of the entire system related to paging. Usually, the discarded message is retransmitted after a period of time, so the paging time is extended, resulting in an increase in the connection delay of the system as a whole. It can be seen that the message is congested or discarded, which causes the paging message to be repeatedly retransmitted, which reduces the processing efficiency of the entire system. For the access channel, in the case of a surge in the amount of access, there is also a problem similar to the paging storm of the paging channel, and will not be described in detail.

Summary of the invention

Embodiments of the present invention provide a method and a device for adjusting a paging channel in a communication system, which are capable of coping with a sudden paging storm and enhancing the processing efficiency of the entire system. The embodiment of the invention further provides a method and a device for adjusting an access channel in a communication system, which can cope with the surge of access amount and enhance the processing efficiency of the entire system.

An embodiment of the present invention provides a method for adjusting a radio air interface paging channel in a communication system, where the method includes: obtaining current paging channel load information of a cell carrier frequency; and performing paging according to the obtained current paging channel load information. Channel adjustment decision, if the result of the decision is that the cell carrier frequency needs to increase the number of paging channels, increase the number of paging channels of the cell carrier frequency; if the result of the decision is that the cell carrier frequency needs to reduce the number of paging channels, then The number of paging channels of the cell carrier frequency is reduced.

The embodiment of the present invention further provides a device for implementing wireless air interface paging channel adjustment in a communication system, where the device includes: a load information learning unit, configured to obtain current paging channel load information of a cell carrier frequency; Performing, according to the current paging channel load information obtained by the load information learning unit, a paging channel adjustment decision of the cell carrier frequency; a channel adjustment execution unit, where the final decision result in the determining unit is the The cell carrier frequency needs to reduce the number of paging channels of the cell carrier frequency when the paging channel number is reduced; and increase the cell carrier frequency when the final decision result is that the cell carrier frequency needs to increase the number of paging channels. The number of channels. The embodiment of the present invention further provides a method for adjusting a wireless air interface access channel in a communication system, where the method includes: obtaining current access channel load information of a cell carrier frequency; performing performing according to the obtained current access channel load information. Incoming channel adjustment decision, if the result of the decision is that the cell carrier frequency needs to increase the number of access channels, increase the number of access channels of the cell carrier frequency; if the result of the decision is that the cell carrier frequency needs to reduce the number of access channels, Then, the number of access channels of the cell carrier frequency is reduced.

The embodiment of the present invention further provides a device for implementing wireless air interface access channel adjustment in a communication system, where the device includes: a load information learning unit, configured to obtain current access channel load information of a cell carrier frequency; Performing an access channel adjustment decision of the cell carrier frequency according to the current access channel load information obtained by the load information knowledge unit; a channel adjustment execution unit, configured to perform, in the cell, the final decision result of the decision unit The frequency needs to reduce the number of access channels of the cell carrier frequency when the number of access channels is reduced; and increase the access channel of the cell carrier frequency when the final decision result is that the cell carrier frequency needs to increase the number of access channels. number.

It can be seen from the above embodiments of the present invention that, in the technical solution of the embodiment of the present invention, the number of corresponding channels can be adaptively increased or decreased according to the current paging channel load or the access channel load of the cell carrier frequency. Cope with sudden paging storms or surge access.

DRAWINGS

1 is a schematic diagram of a CDMA2000 IX system architecture in the prior art;

2 is a flow chart of an embodiment of a method for adaptively adjusting a wireless air interface paging channel in a CDMA system according to the present invention;

3 is a flow chart of an embodiment of a paging channel adaptive adjustment decision method according to the present invention;

4 is a flowchart of an embodiment of hard handoff between code channels in a cell according to the present invention;

FIG. 5 is a schematic structural diagram of an apparatus for implementing paging channel adjustment in the present invention.

detailed description

The embodiments of the present invention will be described in detail below by taking a CDMA system as an example with reference to the accompanying drawings. The CDMA protocol, the paging channel can only be allocated to a code channel W ^ ⁴ to W ₇ ^64. Since at least one paging channel needs to be configured for each available carrier frequency of the CDMA system, the code channel is fixed as a paging channel, and the code channel is a dynamic adjustment of W ₂ ⁶⁴ to W ₇ ⁶⁴ participating channels, and these channels can be used as paging according to the adjustment. The channel can be used as a traffic channel. In order to reduce the complexity of these code channel conversions, the Walsh (Walsh) code channel allocation method is currently constrained as follows: W ₂ ⁶⁴ to W ₇ ⁶⁴ code channels When the last allocation principle, that is, W ₂ ⁶⁴ to W ₇ ⁶⁴ code channels are used as traffic channels, the system allocates w ₇ ⁶⁴ , w ₆ ⁶⁴ , w ₅ ⁶⁴ , w ₄ ⁶⁴ one by one only when other traffic channels are occupied. w ₃ ⁶⁴ , w ₂ ^{64 are} used as traffic channels.

The paging channel adjustment in the embodiment of the present invention is an adaptive adjustment technique, that is, according to the load of the current paging channel, the system adaptively increases and decreases the number of paging channels to match the current paging rate. The adjustment process is based on the principle that the number of paging channels is increased or decreased by one step at a time based on the number of original paging channels, so that the entire dynamic adjustment process is smooth and robust.

An implementation of a method for adaptively adjusting a wireless air interface paging channel in a CDMA system according to the present invention is as shown in FIG. 2, and the specific description is as follows:

Step 1. The BTS monitors the paging channel load condition of the carrier frequency of each cell, and reports (reported to the BSC) the paging channel statistical status report message according to the given duration of the period, and carries the current paging channel load information of the cell carrier frequency;

Step 2. The BSC performs a paging channel adaptive adjustment decision according to the reported paging channel load information. The specific method can be referred to in the following detailed description. If the result of the decision is that the number of paging channels is unchanged, the process ends; if the result of the decision is that the number of paging channels needs to be reduced, the BSC reduces the number of current carrier paging channels by one (or sets other decreasing numbers according to actual conditions); If the result of the decision is that the number of paging channels needs to be increased, the BSC increases the number of current carrier paging channels by one (or sets other incremental numbers according to actual conditions). If it is found that the code channel to which the newly added paging channel belongs is increasing the number of paging channels, then step 3 is performed;

Step 3 (Optional): If the code channel to which the newly added paging channel belongs is found to be in service, the service of the code channel is switched to another idle traffic channel by hard handover between intra-cell code channels. It should be noted that if the system Walsh code channel allocation method strictly follows the W ₂ ⁶⁴ to W ₇ ⁶⁴ code channel final allocation principle, and the paging channel adaptive adjustment decision considers the traffic channel idle condition, this situation will not occur substantially, and thus This step can be omitted. The method of hard switching between code channels in a small area can be referred to in detail later.

Step 4: The BSC sends a cell setup message to the corresponding BTS, and the cell setup message includes a request for the carrier frequency of the cell to increase or decrease the number of paging channels. The channel number information is called, and then the BTS modifies the configuration of the corresponding cell carrier frequency.

Step 5: After the BTS is modified, the BSC is set back to the cell to set a response message. Step 6: After receiving the response message, the BSC starts the adjustment protection timer, sets the adaptive adjustment flag of the current carrier frequency to TRUE, and “TRUE” indicates that the carrier frequency is being adjusted by the paging frequency. After adjusting the protection timer, the adaptive adjustment flag of the current carrier frequency needs to be set to FALSE, and "FALSE" indicates that the current paging channel number adjustment process of the carrier frequency ends. The duration of the adjustment protection timer is generally greater than the duration of the paging channel statistical state 4 at the advertising period of ^=艮.

Step 7: The BSC performs cell system message update to notify all wireless terminals of the latest cell carrier frequency paging channel number.

The flow chart of the paging channel adaptive adjustment decision method is shown in Figure 3, and the detailed description is as follows:

Step 1. Method entry, input the current paging channel load of the cell carrier frequency, first determine the condition 1:

Whether the cell carrier frequency is currently being adjusted.

Step 2. If condition 1 is true (TRUE), the result of the decision is that the number of paging channels does not change. Step 3. If condition 1 is false (FALSE), then judge condition 2: Whether the paging channel load exceeds the paging channel increase threshold (PCH_ADD_THRESHOLD) configured by the system. Step 4: If condition 2 is true, clear the paging channel load lightly consecutive times to 0; otherwise, skip to step 10; the "paging channel load is light, which is equivalent to a variable that can be counted, on the real shield, This variable is used to record the number of times the system decides to reduce the number of paging channels. Step 5: Judgment Condition 3: Whether the current paging channel number of the cell carrier frequency is less than 7 (that is, the maximum number of paging channels allowed by the system) and the idle traffic channel The number is not lower than the configured idle traffic channel threshold (IDLE_TCH_THRESHOLD). If the judgment condition is true, go to step 6, otherwise go to step 7.

Step 6. Judgment condition 4: Admission control is performed to estimate whether the forward load of the carrier frequency after the paging channel is increased is lower than the quasi-entry limit. If the judgment result is true, proceed to step 8; if the judgment result is ^, proceed to step 9.

Step 7. If condition 3 is false, the result of the decision is that the number of paging channels does not change.

Step 8. The result of the decision is that the number of paging channels needs to be increased.

Step 9. If condition 4 is H, the result of the decision is that the number of paging channels does not change.

Step 10: Determine condition 5, whether the paging channel load is lower than a paging channel reduction threshold configured by the system. " Step 11. If condition 5 is true, the paging channel load is lightly increased by one consecutive number; otherwise, skip to step 15.

Step 12: Judging condition 6: Whether the paging channel load light continuous number exceeds the system configured paging channel load light continuous number threshold (PCH_IDLE_PERSIST_NUM) and the current carrier frequency paging channel number is greater than 1 (ie, preset Minimum number of paging channels).

Step 13. If condition 6 is true, the result of the decision is that the number of paging channels needs to be reduced, and the number of consecutive times the paging channel is light is cleared to zero.

Step 14. If condition 6 is H, skip to step 15.

Step 15. The result of the decision is that the number of paging channels does not change.

Step 16. Output the decision result, and the method ends.

In this embodiment, the paging channel reduction threshold configured by the system is smaller than the paging channel increase threshold configured by the system.

As can be seen from the flow of the above specific embodiment, in the decision whether or not to adjust according to the current paging channel load of the cell carrier frequency, it can be comprehensively considered whether several conditions are simultaneously satisfied. However, it should be noted that if only the most basic adaptive adjustment is considered, only condition 2 and condition 5 need to be judged. Further, if the current paging channel load exceeds the system configured paging channel increase threshold, then the decision is made. It is necessary to increase the number of paging channels; if the current paging channel load is lower than the paging channel reduction threshold configured by the system, it is decided to reduce the number of paging channels. Further, in order to obtain a more perfect adaptive effect, one or more of several other conditions can be combined with consideration. In addition, since there are only three cases of the judgment result, one is to increase the number of paging channels; the second is to reduce the number of paging channels; the third is that no adjustment is needed. Moreover, for the third case, the system does not need to perform any subsequent operations. Therefore, those skilled in the art can understand that, in a specific implementation process, in order to simplify the implementation process, the decision result may be given only in the first case and the second case, so as to perform subsequent adjustment steps according to the decision result; In the third case, it is not necessary to give a decision result, which is equivalent to the system not performing any action as long as there is no decision to increase or decrease the number of paging channels, and the current status remains unchanged.

Considering that if the system Walsh code channel allocation method does not follow the W ₂ ⁶⁴ to W ₇ ⁶⁴ code channel final allocation principle, in the embodiment of the present invention, it is proposed to convert from a traffic channel to a paging channel by increasing a cell-to-code inter-code channel hard handover procedure. The service of the code channel is switched to another idle traffic channel to free up the code channel for use as a paging channel without interrupting the original service. Embodiment of the hard handover between code channels in a cell The process is shown in Figure 4, and the details are as follows:

1. Base station subsystem The BSS determines that it is necessary to perform hard handover between intra-cell code channels according to the process decision.

For example, if the original code channel is A, and now the A code channel is to be converted into a paging channel, another idle traffic channel B needs to be allocated to the wireless terminal (such as a mobile phone) on the same carrier frequency of the local cell, and a conventional handover indication message is constructed. General Handoff Direction Message (General Handoff Direction I

Universal Handoff Direction), and sent to the wireless terminal on the original traffic channel.

2. After receiving the normal handover indication message/general handover indication message, the wireless terminal will adjust the parameters in the message according to the message and perform access on the designated new channel. After the access is successful, the wireless terminal is on the new channel. Send a handover complete message (Handoff Completion).

3. After the base station subsystem receives the handover complete message, the BSS releases the original channel. And sending a handover execution message (Handoff Perform) to the MSC to notify the MSC that the wireless terminal handover is complete. In addition, the paging channel adjustment can first consider the paging channel to increase and decelerate. (The CDMA2000 1X system paging channel rate is 4800bps and 9600bps. The speed increase can only be changed from 4800bps to 9600bps. It is only possible to change the paging channel rate from 9600 bps to 4800 bps, and then consider increasing and decreasing the number of channels.

A person skilled in the art may understand that all or part of the steps in implementing the above method embodiments may be completed by a program instructing related hardware, and the program may be stored in a computer readable storage medium, the storage medium Such as: ROM RAM, disk, CD, etc.

Please refer to FIG. 5 , which is a schematic structural diagram of an apparatus for implementing wireless air interface paging channel adjustment in a communication system according to the present invention. The apparatus in this embodiment generally includes a load information learning unit 51, a decision unit 52, and a channel adjustment execution unit 53. In the following, combined with the specific working principle of the device, the internal components and the connection relationship between these components are further introduced. The device can be a base station controller.

First, the load information aware unit 51 obtains the current paging channel load information of the cell carrier frequency. For example, the load information learning unit 51 receives the current paging channel load information that the base station actively reports in a periodic manner or a threshold manner, or the load information learning unit 51 requests the current paging channel load information from the base transceiver station.

Then, the determining unit 52 performs the paging channel adjustment decision of the cell carrier frequency according to the current paging channel load information obtained by the load information learning unit 51. The specific process of performing a paging channel decision may have Various schemes, for example, the first conditional decision sub-unit 522 and the final decision result decision sub-unit 527 may be set only in the decision unit 52. The first conditional decision sub-unit 522 is configured to determine whether the current paging channel load obtained by the load information learning unit 51 exceeds a paging channel increase threshold configured by the system, or lower than a paging channel reduction threshold configured by the system; The final decision result decision sub-unit 527 determines the final decision result according to the preset condition, and the final decision result is that the preset condition that the number of the carrier frequency paging channel needs to be increased at least includes: the first conditional decision sub-unit 522 gives The first decision result is that the current paging channel load exceeds the paging frequency increase threshold of the system configuration; and the final decision result is that the preset condition that the number of the carrier frequency paging channel needs to be reduced at least includes: the first conditional decision The first decision result given by unit 522 is that the current paging channel load is lower than the paging channel reduction threshold configured by the system.

Further, in order to further optimize the seek number adaptive adjustment technique, an adjustment protection timer 521 may be set in the decision unit 52, and the adjustment protection timer 521 is used to start the paging channel adjustment of the cell carrier frequency in the channel adjustment execution unit 53. When the time starts, the adjustment protection timer 521 times out to indicate that the paging channel adjustment process of the cell carrier frequency ends. Correspondingly, the final decision result determined by the final decision result decision sub-unit 527 is that the preset condition for increasing the number of the carrier frequency paging channel of the cell further includes: determining the cell carrier frequency according to the information provided by the adjustment protection timer 521. Currently, the process is not in the process of paging channel adjustment; the final decision result determined by the final decision result decision sub-unit 527 is that the preset condition for reducing the number of the carrier frequency paging channel of the cell further includes: providing according to the adjustment protection timer 521 The information determines that the cell carrier frequency is not currently in the process of paging channel adjustment. Through the setting of the protection timer, the device in this embodiment does not frequently perform paging channel adjustment, so that the paging channel adaptive adjustment is achieved, and the system stability is also ensured.

Further, the decision unit 52 may further include a second condition decision subunit 523 and a third condition decision subunit 524. The second condition determining sub-unit 523 is configured to determine whether the current paging channel number of the cell carrier frequency is less than the maximum paging channel number allowed by the system, and the number of idle traffic channels is higher than the idle traffic channel threshold configured by the system; The three-condition decision sub-unit 524 is configured to estimate whether the forward load of the cell carrier frequency after the number of paging channels is increased is lower than the quasi-entry limit. Correspondingly, the final decision result determined by the final decision result decision sub-unit 527 is a preset condition that needs to increase the number of paging channels of the cell carrier frequency, and further includes: the decision result of the second condition determining sub-unit 523 is the cell The current paging channel number of the carrier frequency is less than the maximum number of paging channels allowed by the system and the number of idle traffic channels is higher than the system. The configured idle traffic channel number threshold; and the third condition decision sub-unit 524 determines that the forward load of the cell carrier frequency after estimating the number of paging channels is lower than the quasi-entry limit. It should be noted that the second condition decision sub-unit 523 and the third condition decision sub-unit 524 may be set in the decision unit 52 at the same time, or only one of them may be set.

Further, a counting unit 526 and a fourth conditional decision subunit may be provided in the decision unit 52.

525. The counting unit 526 is configured to load the recorded paging channel lightly when the first conditional decision subunit 522 determines that the current paging channel load of the cell carrier frequency is lower than the system configured paging channel reduction threshold. The number of consecutive times has increased. Further, the fourth condition decision subunit 525 determines whether the number of consecutive paging channel loads recorded by the counting unit 526 exceeds the system configured paging channel load light continuous number threshold, and determines the current paging channel of the cell carrier frequency. Whether the number is greater than the preset minimum number of paging channels (such as 1). Correspondingly, the final decision result determined by the final decision result decision subunit 527 is that the preset condition for reducing the number of the carrier frequency paging channel of the cell further includes: the decision result of the fourth condition decision subunit 525 is the paging The channel load lightly consecutive times exceeds the system configured paging channel load light continuous number of thresholds, and the number of current paging channels of the 'j, zone carrier frequency is greater than the preset minimum number of paging channels.

Finally, the channel decision execution unit 53 is notified when the final decision result decided by the decision unit 52 (specifically, the final decision result decision sub-unit 527) is that the number of paging channels needs to be increased or decreased. The channel adjustment performing unit 53 is configured to reduce the number of paging channels of the cell carrier frequency when the final decision result of the determining unit 52 is that the cell carrier frequency needs to reduce the number of paging channels; and the final decision result is When the cell carrier frequency needs to increase the number of paging channels, the number of paging channels of the cell carrier frequency is increased.

It can be seen from the above embodiment of the paging channel adjustment of the present invention that the paging channel adaptive adjustment can optimize the use of traffic channels and paging channels in a communication system (such as a CDMA system), reduce the occurrence of paging channel congestion, and reduce the search. The impact of the initial configuration of the call channel on system performance. When the paging channel is idle, the system maintains the minimum configuration of the paging channel, such as configuring only one paging channel to maximize the traffic channel capacity; when the paging channel is busy, the system adaptively adjusts the paging channel according to the paging channel load. The number configuration reduces the occurrence of paging channel congestion by dynamically increasing the number of paging channels, ensures the timeliness of paging message submission, and stabilizes the performance of the entire system, resulting in various beneficial effects.

For example, in the case of adaptive adjustment of the paging channel, the dependence on the accuracy of the pre-calculation of the paging channel demand can be reduced, and the channel utilization is improved by the full sharing of the channel; Adaptation adjustment can dynamically increase the system paging capacity, reduce the congestion of paging channel messages, and improve system performance; adaptive adjustment of paging channel can dynamically increase the system short message traffic, thereby increasing the operator's revenue; paging channel adaptation The adjustment can increase the access channel capacity at the same time, which can alleviate the access load when many mobile phones are simultaneously accessed, and does not reduce the access speed of the mobile phone; the hard handover between the code channels in the small area can facilitate the CDMA code channel reforming, and can be used for Prevent code channel fragmentation and improve code channel utilization.

As the paging channel increases, the access channel also increases. Therefore, if a system with limited access channel capacity can also consider adjusting the access capability through the adjustment of the paging channel.

In addition, the access channel can also be considered separately. Since each paging channel can be configured with up to 32 access channels, the access channel adaptive adjustment technique can be similarly performed to change the number of access channels in one paging channel without The number of paging channels needs to be modified. For the scheme of adaptive adjustment of the access channel, the general idea is similar to the paging channel. Therefore, the following is only a brief description. It is believed that those skilled in the art can adjust the scheme according to the subordinate access channel and refer to the specific implementation manner of the paging channel adjustment. The method for adjusting the access channel and the corresponding device may be specifically implemented.

The embodiment of the invention discloses an embodiment of a method for adjusting a wireless air interface access channel in a communication system. In this embodiment, the current access channel load information of a cell carrier frequency can be obtained first. For example, the receiving base station transceiver actively reports the current access channel load information according to the periodic mode or the threshold value, or actively sends the load information of the current access channel to the base transceiver station. Then, performing an access channel adjustment decision according to the current access channel load information obtained above, and if the result of the determination is that the cell carrier frequency needs to increase the number of access channels, increasing the number of access channels of the cell carrier frequency; As a result, the cell carrier frequency needs to reduce the number of access channels, and the number of access channels of the cell carrier frequency is reduced.

The specific access channel adjustment decision process includes: if the current access channel load exceeds the system configured access channel increase threshold, the decision needs to increase the number of access channels; if the current access channel load is lower than the system configured access channel decrease Threshold, the decision needs to reduce the number of access channels. Similar to the specific process of the paging channel decision, other conditions can be set according to the specific situation, and various conditions are combined to determine the final decision result.

In addition, the present invention also discloses an apparatus for implementing wireless air interface access channel adjustment in a communication system, where the apparatus includes a load information learning unit, a decision unit, and a channel adjustment execution unit. The load information learning unit is configured to obtain current access channel load information of the cell carrier frequency, and the determining unit is configured to perform the cell carrier frequency according to the current access channel load information obtained by the load information learning unit. Access channel adjustment decision. The determining unit specifically includes a first condition determining subunit and a final decision result determining subunit, wherein the first condition determining subunit is configured to determine whether the current access channel load obtained by the load information learning unit exceeds a system configuration The access channel increases the threshold, or is lower than the access channel reduction threshold configured by the system; the final decision result decision subunit is configured to determine a final decision result according to the preset condition, and the final decision result is that the cell needs to be added The preset condition of the number of carrier frequency access channels includes: the first decision result of the first conditional decision subunit is that the current access channel load exceeds an increase threshold of an access channel configured by the system; The result is that the preset condition for reducing the number of the carrier frequency access channels of the cell includes: the first decision result of the first condition determining subunit is that the current access channel load is lower than the access channel configured by the system. Threshold.

It can be understood by those skilled in the art that the decision unit in this embodiment can also set other condition discriminating subunits according to specific conditions, so that a more complete final decision result can be obtained. For example, an adjustment protection timer or the like may be set in the re-determination unit.

After the decision unit has obtained the final decision result, the channel adjustment execution unit performs a specific adjustment. Specifically, the channel adjustment performing unit reduces the number of access channels of the cell carrier frequency when the final decision result of the determining unit is that the cell carrier frequency needs to reduce the number of access channels; When the cell carrier frequency needs to increase the number of access channels, the number of access channels of the cell carrier frequency is increased.

Claims

Rights request

A method for adjusting a wireless air interface paging channel in a communication system, wherein the method comprises:

Obtaining current paging channel load information of the cell carrier frequency;

Performing a paging channel adjustment decision according to the obtained current paging channel load information, and if the result of the determination is that the cell carrier frequency needs to increase the paging channel number, increasing the number of paging channels of the cell carrier frequency; If the number of paging channels needs to be reduced for the cell carrier frequency, the number of paging channels of the cell carrier frequency is reduced.

2. The method according to claim 1, wherein: the specific process of increasing or decreasing the number of paging channels of the current carrier frequency comprises:

The base station controller BSC sends a cell setup message to the corresponding base transceiver station BTS, where the cell setup message includes information on the number of paging channels that the cell carrier frequency should have after increasing or decreasing the number of paging channels;

The BTS modifies the corresponding cell carrier frequency configuration according to the received cell setup message and sends a cell setup response message to the BSC;

After receiving the response message, the BSC starts an adjustment protection timer, and after the adjustment protection timer expires, the paging channel number adjustment process ends.

The method according to claim 1, wherein the method further comprises: starting an adjustment protection timer when starting the paging channel number adjustment, and no further searching before the adjusting protection timer expires Call channel adjustment decision.

The method according to any one of claims 1 to 3, wherein the step of performing a paging channel adjustment decision according to the current paging channel load information specifically includes:

If the current paging channel load exceeds a paging frequency increase threshold configured by the system, it is determined that the number of paging channels needs to be increased; if the current paging channel load is lower than a paging channel reduction threshold configured by the system, the decision needs to be reduced. Number of paging channels.

5. The method of claim 4, wherein:

The condition that the decision needs to increase the number of paging channels further includes: the cell carrier frequency is not currently in the adjustment process of the number of paging channels;

The condition that the decision needs to reduce the number of paging channels further includes: the cell carrier frequency is not currently seeking The process of adjusting the number of channels.

6. The method of claim 4 wherein:

The condition that the decision needs to increase the number of paging channels further includes: the current paging channel number of the cell carrier frequency is less than the maximum paging channel number allowed by the system, and the number of idle traffic channels is higher than the idle traffic channel threshold configured by the system.

7. The method of claim 4 wherein:

The condition that the decision needs to increase the number of paging channels further includes: estimating that the forward load of the cell carrier frequency after the paging channel is increased is lower than the quasi-entry limit.

8. The method according to claim 4, wherein the method further comprises: increasing a consecutive number of times the paging channel load is light if the paging channel load is lower than a paging channel reduction threshold configured by the system,

The condition that the decision needs to reduce the number of paging channels further includes:

The number of consecutive times the paging channel load is light exceeds a continuous number of consecutive times the paging channel load of the system is configured, and the number of paging channels of the current carrier frequency is greater than the preset minimum number of paging channels.

The method according to any one of claims 1 to 3, wherein: when the result of the decision is that the number of paging channels needs to be increased, the method further includes:

If the code channel to which the newly added paging channel belongs is increasing the number of paging channels, the service of the code channel is switched to another idle traffic channel by hard handover between the code channels in the small cell.

The method according to claim 9, wherein the hard switching process between the code channels in the cell includes:

The base station subsystem BSS sends the handover indication message/general handover indication message to the wireless terminal on the original traffic channel;

After receiving the normal handover indication message/general handover indication message, the wireless terminal adjusts according to the parameter in the message, and performs access on the designated new service channel, and the wireless terminal is in the new service after the successful access. Sending a handover complete message on the channel;

After receiving the handover complete message, the BSS releases the original traffic channel, and sends a handover execution message to the mobile exchange MSC, informing the MSC that the handover of the wireless terminal is completed.

The method according to any one of claims 1 to 3, wherein the paging channel is specifically a paging channel in a code division multiple access communication system.

12. A device for implementing wireless air interface paging channel adjustment in a communication system, the device comprising: a load information learning unit, configured to obtain current paging channel load information of a cell carrier frequency; and a determining unit, configured to perform, according to the load The current paging channel load information obtained by the information learning unit performs a paging channel adjustment decision of the cell carrier frequency;

a channel adjustment execution unit, configured to reduce a paging channel number of the cell carrier frequency when a final decision result of the determining unit is that the cell carrier frequency needs to reduce a paging channel number; and the final decision result is When the cell carrier frequency needs to increase the number of paging channels, the number of paging channels of the cell carrier frequency is increased.

The device according to claim 12, wherein the determining unit specifically includes: a first condition determining subunit, configured to determine whether the current paging channel load obtained by the load information sensing unit exceeds a system configuration The paging channel increases the threshold, or is lower than the paging channel reduction threshold configured by the system;

a final decision result decision subunit, configured to determine a final decision result according to the preset condition, where the final decision result of the decision is that the preset condition for increasing the number of the carrier frequency paging channel of the cell includes: the first The first decision result of the conditional decision subunit is that the current paging channel load exceeds a paging frequency increase threshold configured by the system; the final decision result of the decision is a preset that needs to reduce the number of the carrier frequency paging channel of the cell. The condition includes at least: the first decision result of the first conditional decision subunit is that the current paging channel load is lower than a system configured paging channel reduction threshold.

The device according to claim 13, wherein the determining unit further comprises: an adjustment protection timer, configured to start when the channel adjustment execution unit starts to perform paging channel adjustment of the cell carrier frequency The adjusting the protection timer timeout indicates that the paging channel adjustment process of the cell carrier frequency ends;

The final decision result of the final decision result decision subunit is that the preset condition for increasing the number of the carrier frequency paging channel of the cell further includes: determining, according to the information provided by the adjustment protection timer, the current carrier frequency of the cell Not in the process of paging channel adjustment;

The final decision result determined by the final decision result decision subunit is that the preset condition for reducing the number of the carrier frequency paging channel of the cell further includes: determining, according to the information provided by the adjustment protection timer, the current carrier frequency of the cell Not in the process of paging channel adjustment.

The device according to claim 13 or 14, wherein the determining unit further comprises: a second conditional decision subunit, configured to determine whether the current paging channel number of the carrier frequency of the cell is less than a maximum number of paging channels allowed by the system, and the number of idle traffic channels is higher than a threshold of an idle traffic channel configured by the system;

a third conditional decision subunit, configured to estimate whether a forward load of the cell carrier frequency after the number of paging channels is increased is lower than a quasi-entry limit;

The final decision result of the final decision result decision subunit is that the preset condition of the paging channel number that needs to increase the carrier frequency of the cell further includes: the decision result of the second conditional decision subunit is the cell The number of current paging channels of the frequency is less than the maximum number of paging channels allowed by the system and the number of idle traffic channels is higher than the threshold of the idle traffic channel configured by the system; and the decision result of the third conditional decision subunit is an estimated increase paging The forward load of the cell carrier frequency after the number of channels is lower than the quasi-entry limit.

The device according to claim 13 or 14, wherein the determining unit further comprises:

a counting unit, configured to: when the result of the first conditional decision subunit is that the current paging channel load of the cell carrier frequency is lower than a paging channel reduction threshold configured by the system, the recorded paging channel is lightly loaded. The number of consecutive times increases;

a fourth conditional decision subunit, configured to determine whether the number of consecutive paging channel loads recorded by the counting unit exceeds a system configured paging channel load light continuous number threshold, and determines a current paging channel number of the cell carrier frequency Whether it is greater than the preset minimum number of paging channels;

The final decision result of the final decision result decision subunit is that the preset condition for reducing the number of the carrier frequency paging channel of the cell further includes: the decision result of the fourth conditional decision subunit is the paging channel The light load continuous number exceeds the system configured paging channel load light continuous number of thresholds, and the current paging channel number of the cell carrier frequency is greater than the preset minimum paging channel number.

A method for adjusting a wireless air interface access channel in a communication system, the method comprising: obtaining current channel load information of a cell carrier frequency;

Performing an access channel adjustment decision according to the obtained current access channel load information, and if the result of the determination is that the cell carrier frequency needs to increase the number of access channels, increasing the number of access channels of the cell carrier frequency; If the number of access channels needs to be reduced for the cell carrier frequency, the number of access channels of the cell carrier frequency is reduced.

The method according to claim 17, wherein the step of performing an access channel adjustment decision according to the current access channel load information specifically includes:

If the current access channel load exceeds the access threshold of the system configuration, the decision is required to increase the number of access channels; if the current access channel load is lower than the access channel reduction threshold configured by the system, the decision needs to be reduced. Number of access channels.

A device for implementing wireless air interface access channel adjustment in a communication system, the device comprising: a load information learning unit, configured to obtain current access channel load information of a cell carrier frequency; and a determining unit, configured to perform, according to the load The current access channel load information obtained by the information learning unit performs an access channel adjustment decision of the cell carrier frequency;

a channel adjustment performing unit, configured to reduce an access channel number of the cell carrier frequency when a final decision result of the determining unit is that the cell carrier frequency needs to reduce an access channel number; and the final decision result is When the cell carrier frequency needs to increase the number of access channels, the number of access channels of the cell carrier frequency is increased.

The device according to claim 19, wherein the determining unit specifically includes: a first condition determining subunit, configured to determine whether the current access channel load obtained by the load information learning unit exceeds a system The configured access channel increases the threshold, or is lower than the access channel reduction threshold configured by the system;

a final decision result decision subunit, configured to determine a final decision result according to a preset condition, where the decision is that the final decision result is that a preset condition that needs to increase the number of the carrier frequency access channels of the cell includes: the first condition The first decision result of the determining subunit is that the current access channel load exceeds an access channel configured by the system, and the threshold is determined; the final decision result is that the preset condition for reducing the number of the carrier frequency access channels of the cell is at least The method includes: the first decision result of the first conditional decision subunit is that the current access channel load is lower than a system configured access channel reduction threshold.