CN100391272C - A method for allocating high-speed channel resources - Google Patents

Abstract

The invention discloses a method for allocating high-speed channel resources. The method firstly sets threshold information including at least the wireless resource threshold; Wireless resource, if the wireless resource is less than the wireless resource threshold set in step a, allocate unlimited high-speed channel resources, otherwise, allocate limited high-speed channel resources. The solution of the invention solves the problem that the prior art can only use the high-speed channel resource allocation with unlimited or limited duration. Through the solution of the present invention, it is realized that when the available resources are few, the high-speed channel resources of limited duration are allocated, and when the available resources are large, the high-speed channel resources of unlimited duration are allocated, the transmission efficiency of the system is improved, and the transmission efficiency of a single user is realized. maximize.

Description

A method for allocating high-speed channel resources

technical field

The present invention relates to wireless channel resource allocation technology in the field of wireless data services, and more precisely relates to a method for allocating high-speed channel resources.

Background technique

In the field of wireless data services, many users usually share limited wireless resources, and the wireless environment changes rapidly. The wireless resources in the system may be sufficient at a certain moment, but very scarce at the next moment. In order to save limited wireless resources as much as possible, when a user requests a data service, the system generally only allocates low-rate basic channel resources for the user, so that the user occupies less wireless resources; the system only detects that the user has a large number of The high-speed channel resource is only allocated to the user when the data needs to be transmitted, or the user actively requests the high-speed channel resource. In this case, the user occupies more wireless resources.

High-speed channel resources are also generally referred to as bursts, therefore, allocating high-speed channel resources is allocating bursts. The burst has two important elements, one is the rate, that is, the rate of the channel resource allocated to the user by the system; the other is the duration, that is, the duration of the high-speed channel resource allocated to the user. According to the classification of the duration of the burst, there are currently two types of bursts, one is the unlimited duration burst, that is, once the high-speed channel resource is allocated to a user, the user can always use the channel resource unless the system Issue a release command or tear down the call; the other is a burst of limited duration. In this case, the command for allocating high-speed channel resources also includes the duration allocated to the user in advance. When the user uses the high-speed channel resource for the duration After that, the high-speed channel resources are automatically released.

For burst allocation, there are currently four allocation methods, and the four methods will be described respectively below.

The first is an infinite-duration burst allocation method. Specifically, when the system allocates high-speed channel resources to a user, the system allocates an infinite burst to the user. The user can use the burst until the system releases the burst, or the user's call is disconnected or goes dormant. The disadvantage of this allocation method is that the allocation is too fixed and cannot adapt to changes in the wireless environment. For example, a user applies for a burst rate at a certain rate based on the amount of data that needs to be sent currently. In the process of sending data using this burst, if the amount of data that the user needs to send increases, the burst may not be able to be sent. So much data leads to interruption of transmission; if the amount of data that users need to receive is reduced, resources will be idle and precious wireless resources will be wasted. Moreover, this allocation method will affect users' fair competition for channel resources. For example, if all high-speed channel resources of the system are allocated to users who apply for channel resources first, users who enter the system later may not be able to apply for high-speed channel resources.

The second is a fixed short-duration burst allocation method. Specifically, when the system allocates high-speed channel resources to a certain user, it only allocates several bursts of limited duration to the user, and the duration of each burst is very short and has a certain fixed length. When data is transferred in these bursts, the next burst begins to transfer data only after the current burst of transferred data is terminated.

Taking the burst transmission coordinate diagram shown in Figure 1 as an example, the data of a certain user is jointly transmitted by burst 1, burst 2, burst 3, and burst 4, and only after burst 1 is terminated, burst 2 starts to transmit data, and so on, after burst 2 terminates, burst 3 transmits data; after burst 3 terminates, burst 4 transmits data.

Take burst 1 and burst 2 in Figure 1 as an example. The system starts to plan burst 2 when burst 1 is terminated, and sends signaling containing burst 2 related information to users after burst 2 planning is completed. Therefore, there is a certain time interval between each burst . This time interval is called a burst delay, and the burst delay includes the processing time of the base station system, the air transmission delay and the processing time of the mobile station, etc. Generally speaking, the burst delay needs at least 120ms.

For resource allocation, the transmission efficiency of the system is a very important index. The higher the transmission efficiency of the system, the greater the throughput of users within the transmission time, and the higher the utilization rate of system resources. The transmission efficiency of the system can be calculated by the following formula,

Transmission efficiency = burst duration / (burst duration + burst delay) × 100%

Then when the burst delay is longer, the transmission efficiency of the system will be lower. If the burst delay in general is 120ms, and the burst duration is set to 120ms, then the transmission efficiency of the system is only 50%.

It can be seen that although the fixed short-duration burst allocation method solves the problem that the infinite-duration burst allocation method can only allocate fixed high-speed channel resources for users, the fixed short-duration burst allocation method has a gap between two adjacent bursts. Due to the existence of burst delay, the transmission efficiency of this method is low, and the throughput of a single user cannot be maximized within the transmission time, especially when the burst duration is short and the burst delay is long. In addition, the burst duration allocated by this method is fixed, which cannot adapt to changes in the wireless environment, and is not conducive to improving the transmission efficiency of the system. In addition, the base station must send signaling to the user when transmitting each burst, which increases the air load of the forward link and the processing load of the terminal, and also affects the data transmission efficiency.

The third is an unfixed limited-duration burst allocation method. The difference between this method and the second allocation method, that is, the fixed short-duration burst allocation method, is that the burst duration of this method is not fixed, and when the wireless environment is good, a longer burst can be allocated to the user. Duration, when the wireless environment is poor, a shorter burst duration is assigned to the user. This unfixed finite-duration burst allocation method can adapt to changes in the wireless environment to a certain extent, but this method does not solve the problem of burst delay, and there is still a burst delay between two bursts, and The base station still needs to frequently send signaling to the mobile phone.

The fourth is an improved fixed short-duration burst allocation method. The difference between this method and the second allocation method, that is, the fixed short-duration burst allocation method, is that this method uses the method of planning in advance, so that the base station begins to assign the next burst to the user when the current burst has not yet terminated. , so that there is no delay between two bursts.

As shown in Figure 2, the data transmission of a certain user is shared by burst 1, burst 2, burst 3, and burst 4. Taking burst 1 and burst 2 in FIG. 2 as an example, the planning method in advance will be described below. t1 is the start time of burst 1 transmission, and t4 is the normal termination time of burst 1. In order to solve the delay problem between burst 1 and burst 2, the system starts to plan burst 2 at t2. If planned Ideally, time t3 should be equal to time t4, that is, there is no overlap between burst 1 and burst 2, and there is no gap between burst 1 and burst 2. However, such a good effect is often not achieved. As shown in Figure 2, burst 2 starts at time t3, that is, burst 2 overlaps with burst 1, and burst 1 is automatically terminated at time t3, which is earlier than the originally planned termination time t4. In this case, if the overlapping period is longer, the effective transmission efficiency of the burst will be lower. In addition, although this allocation method solves the problem of delay between two bursts, since the base station often needs to issue a command to the user to terminate burst 1 in advance, the signaling assigned by the base station to the user is more frequent. The signaling interaction between various subsystems in the base station system is also more frequent, which increases the signaling processing load of the base station system and users, and is not conducive to the improvement of transmission efficiency.

Among the above four distribution methods, the first one is an unlimited-duration distribution method, and the other three are finite-duration distribution methods. The transmission efficiency of the infinite duration allocation method is very high, but the allocation of this method is too fixed, which often cannot meet the changing requirements of the wireless environment, and when many users need to use high-speed channel resources, or in other words, the wireless resources of the system are relatively few , this method cannot guarantee that all users can apply for high-speed channel resources. The limited duration allocation method can ensure that all users have the opportunity to use high-speed channel resources, but the transmission efficiency of this type of method is low, and this type of method often requires the base station to send signaling to users frequently, which increases the forward link. The air load and the user's processing load also affect the data transmission efficiency of the system. In addition, when the current radio resources of the system are relatively sufficient, the current radio resources cannot be fully utilized by using the burst allocation method with a limited duration.

Contents of the invention

In view of this, the main purpose of the present invention is to provide a method for allocating high-speed channel resources, so as to flexibly allocate limited or unlimited high-speed channel resources to users according to the current wireless resource situation, so that all users have the opportunity to use High-speed channel resources, and improve the data transmission efficiency of the system.

To achieve the above object, the technical solution of the present invention is achieved in that a method for allocating high-speed channel resources, the method comprising the following steps:

a. Setting threshold information including at least a wireless resource threshold;

b. When allocating high-speed channel resources, determine the currently used wireless resources of the system and the sum of the currently required wireless resources after allocating the currently required high-speed channel resources, if the sum of the wireless resources is less than the one set in step a If the wireless resource threshold is higher than the wireless resource threshold, the high-speed channel resource with an unlimited duration is allocated; otherwise, the high-speed channel resource with a limited duration is allocated.

In the step b, the determination of the currently used wireless resources of the system after allocating the currently required high-speed channel resources and the sum of the currently required wireless resources is: obtain the currently used wireless resources of the system, and set The currently required transmission rate is used to obtain the currently required wireless resource according to the transmission rate, and then the sum of the two wireless resources is obtained.

Before the step b, it further includes: receiving request information for allocating high-speed channel resources;

In step b, the setting of the currently required transmission rate is: the transmission rate carried in the request information is used as the current transmission rate to be allocated.

Before the step b, it further includes: detecting that there is currently data that needs to be sent through high-speed channel resources;

In step b, the setting of the currently required transmission rate is: assigning the transmission rate according to the amount of data currently required to be transmitted.

In the step b, when allocating limited-duration high-speed channel resources, the previously set transmission rate is further reduced.

The step b further starts a timer when allocating unlimited high-speed channel resources;

The method further comprises the steps of:

c. judge whether the timer started in step b is overtime, if overtime, then enter step d, otherwise, re-execute step c;

d. Determine whether the current data transmission is completed. If the transmission is completed, release the allocated unlimited high-speed channel resources. If the transmission is not completed, continue to transmit data with the currently allocated unlimited high-speed channel resources and restart the timer. After that Return to step c.

Before continuing to transmit data with the currently allocated unlimited-duration high-speed channel resources, it further includes: obtaining the currently used wireless resources, and judging whether the wireless resources are smaller than the preset wireless resource judgment threshold, and if so, continue the execution A step of transmitting data using the currently allocated high-speed channel resources; otherwise, terminating the currently allocated unlimited-duration high-speed channel resources, and allocating limited-duration high-speed channel resources, and then ending the current processing flow.

In the step b, after allocating unlimited high-speed channel resources, it further includes: judging whether the currently used wireless resources are smaller than a preset wireless resource determination threshold, and if so, continue to transmit data through unlimited high-speed channel resources ; Otherwise, judge whether the current data transmission is completed, if the transmission is completed, release the allocated unlimited-duration high-speed channel resources, if not, terminate the currently allocated unlimited-duration high-speed channel resources, and allocate limited-duration high-speed channel resources .

The threshold information set in step a further includes: a hysteresis parameter;

The wireless resource determination threshold is: the sum of the wireless resource threshold set in step a and the hysteresis parameter.

In the step b, after allocating unlimited high-speed channel resources, further receiving information requesting release of high-speed channel resources;

Then the method may further include: directly terminating the currently allocated unlimited-duration high-speed channel resources.

The wireless resources are power resources, or channel unit resources, or forward Walsh code resources.

The solution of the present invention judges whether the wireless resources used by the system are smaller than the wireless resource threshold by setting the wireless resource threshold, and makes corresponding settings according to the current judgment result, so as to realize the allocation of limited-time high-speed channel resources when the available resources are few , when there are many available resources, allocate unlimited high-speed channel resources, so that multiple users can share and compete for limited wireless resources, improve the transmission efficiency of the system, and maximize the transmission efficiency of a single user. In addition, the transmission of data through the high-speed channel resources with unlimited duration also greatly reduces the air signaling process during the allocation of limited duration.

The solution of the present invention can also convert the unlimited-time high-speed channel resource into the limited-time high-speed channel resource according to the current wireless resource situation, so it can adapt to the change of the wireless environment in time.

The solution of the present invention can also terminate the allocated wireless duration high-speed channel resources in time when the user data transmission is completed, thereby avoiding the waste of wireless resources.

Description of drawings

FIG. 1 is a transmission coordinate diagram of fixed short-duration burst allocation in the prior art;

FIG. 2 is a transmission coordinate diagram of an improved fixed short-duration burst allocation in the prior art;

Fig. 3 is a flow chart of the implementation of the solution of the present invention.

Detailed ways

The wireless resources in the system specifically include many kinds, such as power resources, channel element (CE, Channel Element) resources, forward Walsh code (Walsh Code) resources, and the like. Under different circumstances, one of the wireless resources may become the current bottleneck resource. The solution of the present invention is to monitor the current bottleneck resource, and determine the current resource allocation situation according to the bottleneck resource.

Taking power resource as the current bottleneck resource as an example, the solution of the present invention will be further described in detail in combination with the drawings and specific embodiments.

Referring to Fig. 3, the scheme of the present invention is realized through the following steps:

Step 301, pre-setting the power resource threshold and the judgment strategy of the current power resource usage.

The power resource threshold can be set according to one's own needs, for example, the power resource threshold is set to 80% of the total power resource.

The judging strategy for the current power resource usage can be set as follows: After the system allocates high-speed channel resources for users, whether the sum of the currently used power resources in the system and the current power resources to be used in the system is less than the preset power resource threshold, if If it is less than , you can allocate burst channels with unlimited duration, otherwise, you can only allocate burst channels with limited duration.

The judgment strategy can also be expressed by the following formula:

(DataPowerInUse+RequiredBurstPower)＜FINITE_BURST_THRESHOLD

Among them, DataPowerInUse is the currently used power resource, RequiredBurstPower is the current power resource to be used, and FINITE_BURST_THRESHOLD is the power resource threshold.

In step 302, when the system needs to allocate high-speed channel resources for users, it first obtains the information that the current power resources have been used.

Here, the system allocates high-speed channel resources to the user, which may be because the user actively sends a burst request to the system, or the system may detect that the user has a large amount of data to be transmitted. The burst request sent by the user to the system carries the transmission rate requested by the user.

Step 303, the system allocates a transmission rate for the user, and obtains the power resources required for information transmission at the transmission rate.

If the system allocates high-speed channel resources to the user because the user sends a burst request, the system can directly allocate the transmission rate carried in the burst request to the user when assigning the preset transmission rate to the user; The allocation of high-speed channel resources is because the system detects that the user has a large amount of data to be transmitted. When the system allocates a preset transmission rate to the user, it allocates the transmission rate according to the current amount of data that needs to be transmitted. For the latter method of allocating the transmission rate, specifically, the corresponding relationship between the amount of data to be sent and the rate of the high-speed channel can be established in advance, and then the transmission rate can be set according to the amount of data currently to be transmitted.

Steps 304-306, judging whether the current wireless resource satisfies the preset wireless resource judging strategy, if so, that is, after the system allocates high-speed channel resources to the user, the power resource that has been used in the system and the power resource that needs to be used currently and is less than the preset power resource threshold, allocate unlimited high-speed channel resources for the user, and transmit data at the transmission rate allocated in step 303, start the timer at the same time, and then enter step 307; After the high-speed channel resource is allocated to the user, if the occupied power resource in the system is greater than or equal to the preset power resource threshold, the limited-time high-speed channel resource is allocated to the user, and the processing ends.

In this step, the setting time of the timer can be set according to the trigger cycle of a limited duration, for example, set to 640ms.

In addition, if it is determined to allocate high-speed channel resources of limited duration to the user, in order to save channel resources, the transmission rate may be reduced on the basis of the transmission rate determined in step 303 when determining the data transmission rate of the user, For example, reduce the transmission rate to half of the original transmission rate.

Step 307 , judging whether the timer is timed out, if it is timed out, go to step 308 ; otherwise, go back to step 307 .

Steps 308-309, judging whether the data transmission of the current user is completed, if the transmission is completed, terminate the unlimited duration high-speed channel resources allocated to the user, and end this processing flow; otherwise, enter step 310.

Steps 310-312: Obtain the wireless resource power currently used by the system, and judge whether the wireless resource power is smaller than the wireless resource threshold preset in step 301, if smaller, continue to use the current transmission efficiency and high-speed channel resources for the user Transmit data, restart the timer, and then return to step 307; otherwise, enter step 313.

Step 313, the system terminates the high-speed channel resources allocated to the user, and allocates high-speed channel resources of limited duration to the user.

Through the above steps, the purpose of the present invention can be achieved.

Through the setting of the above steps, when the currently used wireless power resources are greater than the preset power resource threshold, the system will switch from the current unlimited-duration high-speed channel resources to limited-duration high-speed channel resources. However, if the user still has a large amount of data to transmit after the currently allocated limited-time high-speed channel resources end, the user will request the system to allocate high-speed channel resources again, and the system will use the process shown in Figure 3 to re-allocate the user. High-speed channel resources.

In this way, if the currently used wireless power resource of the system is switched to a limited-duration high-speed channel resource just when it exceeds the preset power resource threshold, when the limited-duration high-speed channel resource allocation ends and there is still data to be sent , the system may still allocate unlimited high-speed channel resources for the remaining data according to the above process. However, in the process of using the unlimited high-speed channel resources to transmit data, it may occur The case where the preset power resource threshold is switched to a high-speed channel resource with a limited duration. That is to say, the system may frequently instruct users to switch between unlimited-duration high-speed channel resources and limited-duration high-speed channel resources, which leads to the fact that users do not really enjoy unlimited-duration high-speed channel resources. This phenomenon can be called the ping-pong effect.

In order to prevent the generation of the ping-pong effect, a hysteresis parameter can also be added on the basis of the wireless resource threshold, then the judgment in step 311 is to judge whether the currently used wireless resource is less than the sum of the wireless resource threshold and the hysteresis parameter, which can be The sum of the radio resource threshold and the hysteresis parameter is called the radio resource decision threshold. Wherein, the hysteresis parameter is also a configuration parameter, and the configuration parameter may be set as 2% to 5% of the total power. This judgment can also be expressed by the following formula:

DataPowerInUse＜(FINITE_BURST_THRESHOLD+TRANSITION_HYSTERESIS)

Among them, DataPowerInUse is the currently used power resource, FINITE_BURST_THRESHOLD is the preset wireless resource threshold, and TRANSITION_HYSTERESIS is the hysteresis parameter.

In the solution of the present invention, re-allocating or terminating the allocation of wireless channel resources may be periodically triggered by setting a timer, as shown in the process shown in FIG. 3 . In fact, the reallocation or termination of allocation can also be triggered by an event, for example, by combining the following two events:

Event (1): Obtain the currently used wireless power resource, and judge whether the wireless power resource exceeds the wireless resource determination threshold. If it does not exceed the wireless resource determination threshold, continue to transmit data at the current rate; if it exceeds, then Determine whether the user's data has been transmitted. If the transmission is completed, the currently allocated unlimited high-speed channel resources will be terminated. If the transmission is not completed, the currently allocated high-speed channel resources will be terminated and limited-time high-speed channel resources will be allocated.

Here, the wireless power determination threshold involved in the event-triggered mode can also be set as required, for example, it can be set as the power resource threshold in step 301, or the wireless The power determination threshold is set to the sum of the power resource threshold set in step 301 and the hysteresis parameter, that is, the wireless power determination threshold is set to FINITE_BURST_THRESHOLD+TRANSITION_HYSTERESIS.

Event (2): If the user data transmission is completed and the high-speed channel resources are requested to be released, the currently allocated unlimited-length high-speed channel resources are directly terminated.

In addition, it should be noted that when the system in the solution of the present invention allocates high-speed channel resources with a limited duration, any one of the three existing allocation methods can be adopted.

The above descriptions are only preferred embodiments of the solutions of the present invention, and are not intended to limit the protection scope of the present invention.

Claims (11)

1. A method for allocating high-speed channel resources, characterized in that the method comprises the following steps: a. Setting threshold information including at least a wireless resource threshold; b. When allocating high-speed channel resources, determine the currently used wireless resources of the system and the sum of the currently required wireless resources after allocating the currently required high-speed channel resources, if the sum of the wireless resources is less than the one set in step a If the wireless resource threshold is higher than the wireless resource threshold, the high-speed channel resource with an unlimited duration is allocated; otherwise, the high-speed channel resource with a limited duration is allocated. 2. The method according to claim 1, characterized in that in said step b, said determining the sum of the currently used wireless resources of the system and the currently required wireless resources after allocating the currently required high-speed channel resources The method is: obtain the currently used wireless resources of the system, set the current required transmission rate, obtain the currently required wireless resources according to the transmission rate, and then obtain the sum of the two wireless resources. 3. The method according to claim 2, characterized in that, before the step b, further comprising: receiving request information for allocating high-speed channel resources; In step b, the setting of the currently required transmission rate is: the transmission rate carried in the request information is used as the current transmission rate to be allocated. 4. The method according to claim 2, characterized in that before the step b, it further comprises: detecting that there is currently data that needs to be sent through high-speed channel resources; In step b, the setting of the currently required transmission rate is: assigning the transmission rate according to the amount of data currently required to be transmitted. 5. The method according to claim 3 or 4, characterized in that, in the step b, when allocating the high-speed channel resources with a limited duration, the previously set transmission rate is further reduced. 6. The method according to claim 1, wherein the step b further starts a timer when allocating unlimited high-speed channel resources; The method further comprises the steps of: c. judge whether the timer started in step b is overtime, if overtime, then enter step d, otherwise, re-execute step c; d. Determine whether the current data transmission is completed. If the transmission is completed, release the allocated unlimited high-speed channel resources. If the transmission is not completed, continue to transmit data with the currently allocated unlimited high-speed channel resources and restart the timer. After that Return to step c. 7. The method according to claim 6, characterized in that, before continuing to transmit data with the currently allocated unlimited-duration high-speed channel resources, further comprising: acquiring the currently used wireless resources, and judging whether the wireless resources It is less than the preset wireless resource determination threshold. If it is less than, execute the step of continuing to transmit data with the currently allocated high-speed channel resources; otherwise, terminate the currently allocated unlimited-duration high-speed channel resources, and allocate limited-duration high-speed channel resources, and then end current processing flow. 8. The method according to claim 1, characterized in that in the step b, after allocating unlimited high-speed channel resources, further comprising: judging whether the currently used wireless resources are smaller than the preset wireless resource determination threshold , if it is less than , then continue to transmit data through the unlimited high-speed channel resources; otherwise, judge whether the current data transmission is complete, if the transmission is complete, release the allocated unlimited high-speed channel resources, if not, terminate the currently allocated Unlimited high-speed channel resources and allocation of limited high-speed channel resources. 9. The method according to claim 7 or 8, wherein the threshold information set in step a further includes: a hysteresis parameter; The wireless resource determination threshold is: the sum of the wireless resource threshold set in step a and the hysteresis parameter. 10. The method according to claim 1, characterized in that in said step b, after allocating unlimited high-speed channel resources, further receiving information requesting release of high-speed channel resources; The method further includes: directly terminating the currently allocated unlimited high-speed channel resources. 11. The method according to claim 1, wherein the wireless resource is a power resource, or a channel element resource, or a forward Walsh code resource.

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