WO2009074095A1 - A method, system and apparatus for adjusting users' quality of service - Google Patents

Abstract

A method, system and base station controller for adjusting users' quality of service. The method includes: determining the load degree of the system; adjusting the policy of distributing resources to different users according to the load status of the system. The system includes: a measuring apparatus for determining the load degree of the system; an adjusting apparatus for adjusting the policy of distributing resources to different users according to the load status of the system. By measuring the load degree of the system, the embodiments of the invention may adjust the policy of distributing the resources to the different users according to the various network load degree status, can ensure the users' quality of service and improve the users' feeling when the system loads over weight.

Description

 Method, system and device for adjusting user service shield quantity

 This application claims priority to Chinese Patent Application No. 200710171996.2, entitled "A Method, System and Apparatus for Adjusting User Service Quality", filed on December 6, 2007, the entire contents of which are hereby incorporated by reference. Combined in this application.

Technical field

 The present invention relates to the field of communications technologies, and in particular, to a method, system and apparatus for adjusting user service quality.

Background technique

 The resources in the existing communication system are limited. As the number of service users increases, the quality of service (QoS) of each user will decrease. If effective control is not implemented, the user experience will be greatly affected. The impact, for example, on the bandwidth, delay, delay jitter, packet loss rate and other indicators can not meet the requirements of the business. For the CDMA2000 EVDO (Code Division Multiple Access 2000 Evolution to Packet Data Optimized services) system, the forward radio resources are mainly the utilization of time slot resources. Currently, a slot fair scheduling method is generally adopted, that is, regardless of whether the system is busy or idle, the time slot resources allocated by the user are the same, and the scheduling policy does not change.

 In the process of implementing the present invention, the inventors have found through research that the above-mentioned prior art does not consider the degree of busyness of the system due to the manner in which the user uses resources, and therefore, in the case of heavy load, the high-level user service shield cannot be obtained. Ensure that the user's overall service shield will also decrease. Moreover, the existing scheduling policy cannot dynamically adjust the user's service quality for the network load situation, nor can it achieve a balanced transition of control.

Summary of the invention

 The embodiments of the present invention provide a method, a system, and a device for adjusting user service quality, which can allocate more time slot resources to high-level users in the case of heavy system load, thereby improving user service quality.

 The embodiments of the present invention provide the following technical solutions:

 The embodiment of the invention provides a method for adjusting user service quality, including:

 Determine the degree of load on the system;

The policy of allocating resources to different users is adjusted according to the load level of the system. The embodiment of the invention further provides a system for adjusting user service quality, comprising: a measuring device, configured to determine a load level of the system;

 The adjusting device is configured to adjust a policy for allocating resources to different users according to the load level of the system.

 The embodiment of the invention further provides a base station controller, including:

 a receiving unit, configured to receive a load level result of the base station;

 An adjustment unit, configured to release air connections of certain low-level or specific users when the base station is heavily loaded.

 According to the above technical solution provided by the embodiment of the present invention, by measuring the load degree of the system, the policy for allocating resources of different users can be adjusted according to different network load levels. The technical solution provided by the embodiment of the present invention can ensure the service quality of high-priority users and improve the user experience when the system is overloaded.

 The invention is further described below in conjunction with the drawings and specific embodiments.

BRIEF DESCRIPTION OF THE DRAWINGS In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the description of the prior art will be briefly described below, and obviously, in the following description The drawings are only some of the embodiments of the present invention, and other drawings may be obtained from those of ordinary skill in the art without departing from the scope of the invention.

 1 is a flowchart of a method for adjusting user service quality according to Embodiment 1 of the present invention;

 2 is a flow chart of measuring the load of the system according to the second embodiment of the present invention;

 3 is a flow chart of the load of the third measurement system in the embodiment of the present invention;

 4 is a schematic structural diagram of a system for adjusting a user service shield according to Embodiment 4 of the present invention;

 FIG. 5 is a schematic structural diagram of a system for adjusting a user service quality according to Embodiment 5 of the present invention; FIG.

 FIG. 6 is a schematic structural diagram of a sixth measuring device according to an embodiment of the present invention.

detailed description

The embodiment of the invention provides a method, a system and a device for adjusting the amount of the user service shield. The user service quality can be adjusted according to the degree of the system load. In order to make the purpose, technical solution and advantages of the present invention more clear, the following mainly compares A typical CDMA2000 EVDO system is taken as an example, and the present invention will be further described in detail with reference to the drawings and embodiments. Obviously, the described embodiment is only the present invention. Some embodiments, but not all of the embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.

 A method for adjusting user service quality is provided in Embodiment 1 of the present invention. As shown in FIG. 1, the following steps are included:

 Step 101: Determine a load level of the system;

 Step 102: Adjust a policy for allocating resources of different users according to the load level of the system. Specifically, the method may be implemented in the following two manners, where the two methods may be used separately or in combination.

 Method 1: Sector User Number Mode

 The current system load is measured based on the actual number of users of the sector or the number of equivalent users. Usually, the equivalent number of users in the # sector is more objective to judge the current system load. The equivalent number of users refers to: the user's level weight X the number of users of the level.

 As shown in FIG. 2, a second embodiment of the present invention provides a method for measuring system load, including the following steps:

 Step 201: Set a threshold of the number of users on the system side;

 Step 202: Calculate an equivalent user number of the sector;

 Step 203: Compare the calculated equivalent user number with a preset user number threshold. When the number of equivalent users of the sector exceeds the threshold, the system is considered to be overloaded.

 For example, a sector has 3 actual users, namely, 1 gold card user, 1 card user, and 1 bronze card user. Among them, the weight of gold, silver and copper is 4: 2: 1 , then the actual number of users is 3, and the number of equivalent users is 7. If the threshold of the number of users set on the system side is 5, the system is considered to be overloaded.

 Method 2: User equivalent rate mode

 Considering the behavior that affects the forward load of the best-effort (BE) service in the sector is the user's actual participation in the data transmission. Therefore, in the embodiment of the present invention, the user who can reflect the behavior of the user actually participating in the data transmission is utilized. Rate, to measure the forward load of the BE traffic within the sector.

 A third embodiment of the present invention provides a method for measuring the forward load of a sector. Referring to FIG. 3, the following steps are included:

Step 301: Set a rate threshold on the system side. Step 302: Calculate a user equivalent rate of the sector for measuring the forward load of the sector BE service. Step 303: Compare the calculated user equivalent rate with a preset rate threshold, when the user of the sector is equivalent When the rate exceeds this threshold, the system is considered to be overloaded.

 In the embodiment of the present invention, the intra-sector user equivalent rate is used to measure the forward load of the BE service in the sector, and the metric exists between the forward load of the BE service in the sector and the user equivalent rate in the sector. The relationship may be: the greater the user equivalent rate within the sector, the smaller the forward load of the BE traffic within the sector it measures; the smaller the user equivalent rate within the sector, the less The forward load of the BE service in the sector is larger. Correspondingly, the current user equivalent rate within the sector can be used to measure the current forward load of the BE traffic within the sector.

 In the embodiment of the present invention, the user equivalent rate is used to reflect the situation in which the BE service user transmits data in a sector within a time period.

 In the embodiment of the present invention, if there are X BE service users in the sector, it is set that within a time period T, there are m BE service users in the sector transmitting data, m is greater than or equal to 1, less than or equal to X, and the T period The m users are always transmitting data, and the total amount of data sent in the sector in the T period is D. Then, among the m BE service users in the T period in the embodiment of the present invention, the average user transmission is obtained. The rate of data R is calculated as:

 = ( D /m ) ÷T ( 1 ) This formula (1 ) is equivalent to the following formula (2 ):

 =D/(mxT) ( 2 ) Logically, there is a correspondence between D and T in equation (2), but considering the actual application, the user may not always transmit data during the selected T period, such as within 20s selected. In the first 15s, one user is transmitting data, and within two s, two users are transmitting data. Therefore, if R is calculated strictly using the calculation formula (2), one of the solutions is to divide the T period into more. In a small time period, the R in the smaller hour is calculated, but since the user's online behavior is dynamic, it is inevitable that the same difficulty will be encountered in the calculation of the T period in the smaller hour.

 The embodiment of the present invention further considers the practicability of the calculation formula (2), and performs equivalent transformation on the calculation formula (2). That is, let Th denote the user equivalent rate, then the calculation formula for calculating the user equivalent rate of the sector given in the embodiment of the present invention is:

Th=D/Time. (3) The calculation formula (3) represents the user equivalent rate calculated within a preset time period Time, the user equivalent rate being equal to the sum of the data transmitted by all BE service users in the sector during the time period divided by the respective participation data. The sum of the time taken by the transmitted users to transmit data each. Computational

(3), D is the sum of data transmitted by all users in the sector during the time period, and Time is the sum of the time used by each user to transmit data for each data transmission, and the time taken by the user to transmit data may also be referred to as The user's participation in scheduling time.

 The above calculation formulas (1), (2), and (3) are equivalent because the calculation formula (3) actually converts the number of users in the T period in the calculation formula (2). For example, set a time period of 60s, and set up three BE service users with A, B, and C in one sector, and divide 60s into three time periods. If A participates in the scheduling time for the first 20s, the data volume is transmitted. For Dl; B, the scheduling time is 20s in the middle, and the data volume is D2; C participates in the scheduling time as 40s, and the data volume is D3; if the average data transmission rate of users within 60s is calculated directly by calculation formula (2), That is, the user equivalent rate is more difficult, and according to the calculation formula (3), the user equivalent rate in the sector is:

 Th= D/Time= ( D1+ D2+ D3 ) / ( 20s+20s+40s ) ( 4 ) In equation (4 ),

 Time=20s+20s+40s= (1+1/3) x60s (5) It is actually equivalent to the following expression of formula (1):

 mxT= ( 1+1/3 ) x60s

 That is to say, the equivalent number of users who have been transmitting data for the above 60s is (1+1/3).

 The above example is not a patchwork or coincidence of numbers, but the equivalent conversion of the equivalent number of users who have been transmitting data in the Time period is implied in the calculation formula (3).

 Within a sector, each user corresponds to the same user equivalent rate. The user equivalent rate is used to measure the forward load of the BE service in the corresponding sector. Therefore, in the embodiment of the present invention, the current forward load information of the BE service in the sector can be obtained by acquiring the current user equivalent rate of the sector in real time, that is, if the current user equivalent rate of the sector decreases, the fan is represented. The current forward load of the BE service in the area increases, that is, the current system load is too heavy.

Of course, in order to obtain the current forward load information of the ideal intra-sector BE service, it is necessary to be able to calculate the user equivalent rate at the current time, and in reality, calculate the equivalent rate of the user at a point in time. It will be more difficult, on the one hand, actually in the control sector, BE industry When the forward load is used, the measurement result of such high precision is not necessarily required, and therefore, the user equivalent rate may actually be a concept of an average value.

 Considering the actual application, the user equivalent rate will be affected by noise. Therefore, in order to make the detected user equivalent rate not too much interference due to the unexpected event, the user equivalent rate calculated by the calculation formula (3) can be calculated. Perform filtering processing. Let the user's equivalent rate in the current preset time length T ( n ) of the sector be AvgTh ( n ), and the user equivalent rate in the previous period T ( n-1 ) is AvgTh ( n-1 ), AvgTh ( n ) The weight of the weight is α, which reflects the contribution of the current user equivalent rate to the forward load of the BE service in the measurement sector. The default value of a can be set to 0.5. The calculation for filtering AvgTh ( n ) is:

 AvgTh ( N ) = ( l-α ) AvgTh ( n-1 ) + «AvgTh ( n ). (6)

AvgTh ( N ) is the current user equivalent rate of the filtered sector for measuring the current forward load of the BE traffic in the sector. The trend of the user equivalent rate between the filtered periods is smoother. .

 Through the above measurement methods, the degree of load of the system can be measured more accurately.

 For CDMA2000 EVDO systems, the forward air interface resources are mainly time slot resources. According to the present invention, according to the system load situation obtained in step 101, the policy of allocating resources to different users can be adjusted accordingly. Specifically, the step 102 can be implemented in the following three manners, and the three methods may be used alone or in any combination.

 Manner 1: Dynamically change the air interface scheduling parameters to give higher-level users a higher air interface scheduling parameter value in case of heavy load.

 For the CDMA2000 EVDO system of this embodiment, the air interface scheduling parameter is specifically a GosFactor value.

 In the CDMA2000 EVDO system, the forward traffic channel data frame is transmitted in a time division manner. Therefore, in a specific time slot, the system can only provide service for one of the users, and how to determine which user to serve in a specific time slot is The forward scheduling algorithm of the system.

 First, introduce the three priorities involved in the algorithm:

 Bit Stuffing Metric (BSM): Each byte has its own Bit stuffing priority, which determines the order in which bytes waiting in the Queue are filled into the packet (the larger the value, the earlier the packet is entered).

Bit Metric ( BM ): The priority of each byte, which determines which data in different queues Can be added to the transfer instance.

 Packet Metric (PM): The priority of the packet, which determines that packets in the candidate Transmission instance are scheduled (the one with the highest priority will be scheduled).

 The BSM determines the order of the bytes (or bits) of each queue in a given transport instance. Once the candidate transport instance is created, the PM is also calculated to determine which instance is scheduled. Specifically, the value of the "GosFactor" parameter of the user terminal to which the data stream belongs is a coefficient factor, and the priority of each data stream is calculated according to the following formula 1:

GoSFactor .Thrghpt 2 DelayConvFactorBSM

TSBSM = Equation 1 max( £, AvgThroughput - T arg etThroughput ) Similarly, the value of the "GosFactor" parameter of the user terminal to which the data stream belongs is the coefficient factor, and the priority level of each bit in each data stream is calculated according to the following formula 2:

Max ε, AvgT roug put - T arg etT roug put where TS _BSM represents the priority of the data stream and TS _BM represents the priority of the bits in the data stream, valid for all throughput sensitive flows, for throughput sensitive services Translation of delay-sensitive services, so that throughput-sensitive services can be compared with delay-sensitive services, and are important in single-user composite packages and multi-user packets; ε is a positive number less than a predetermined threshold (ie, smaller) Positive number), AvgThroughput represents the actual average throughput, which is a filtered throughput; TargetThroughput represents the target throughput, which is the parameter set for each stream.

 Then, the currently scheduled user terminal is determined by the following formula 3:

PacketMetricf k J ^BitMetricfiJ

SpanfkJ _ie

 BitMetric indicates the bit priority, which can be obtained by Equation 1 and Equation 2. Span indicates the occupied time slot, and PacketMetric indicates the priority of the data packet. That is to say, the currently scheduled user terminal is the user terminal to which the highest priority data packet belongs.

Since the priority of each data stream and the ratio in each data stream are calculated by formula 1 and formula 2 The special priority takes into account the relationship between the actual average throughput and the target throughput, that is, the more the actual average throughput is greater than the target throughput, the lower the priority of each bit in the data stream and the data stream. The lower the chance of transmitting an instance, the lower the chance of getting a schedule. When the actual average throughput is less than the target throughput, since ε is a small positive number, the ratio is large, obviously, in the data stream and the data stream. The higher the priority of each bit, the greater the chance of getting into the candidate transmission instance, the higher the chance of obtaining the scheduling, and the fairness of the time slot allocation.

 For the specific allocation, please refer to the following table 1 (the value can be changed separately):

 Table 1

 The system load condition and user level are mapped to the "GosFactor" parameter. In the process of scheduling, the priority of each data stream and each data are calculated by using the "GosFactor" J^: value of the user terminal to which the data stream belongs. The priority of each bit in the stream, and then the currently scheduled user terminal is determined according to the calculated priority of each data stream and the priority of each bit in each data stream. A specific implementation method is provided for how to preferentially schedule high-level user terminals in the air interface according to the detection system load condition.

When calculating the priority level of each data stream and the priority level of each bit in each data stream, the relationship between the actual average throughput and the target throughput is also considered, that is, the actual average throughput is greater than the target throughput. The lower the chance of entering the candidate transmission instance, the lower the chance of obtaining the scheduling. When the average throughput is less than the target throughput, since _ε is a small positive number, the ratio is large, thus obtaining the candidate transmission instance. The greater the chance, the higher the chance of obtaining a schedule, reflecting the fairness of time slot allocation.

 Method 2: Let some low-level or specific users do not participate in air interface scheduling for a period of time.

In the case of heavy system load, the function identifier of the base station scheduling chip is empty or unavailable, so that these users do not participate in air interface scheduling, and the saved time slots are allocated to high-level users, in order to prevent certain users from being unable to obtain for a long time. The air interface resource causes the connection to be released, and the users who prohibit the scheduling are also scheduled to take turns according to the time. When the system load is reduced, the previous scheduling method is restored. Method 3: Release some low-level or specific user air interface connections.

 Specifically, the system selects a low level or a specific user according to the load condition and releases the air interface connection of the selected user.

 Meanwhile, Embodiment 4 of the present invention provides a system for adjusting user service quality. As shown in FIG. 4, the system includes a measurement device 401 and an adjustment device 402, where:

 a measuring device 401, configured to determine a load level of the system;

 The adjusting device 402 is configured to adjust the load of the different users according to the load situation of the #home system.

 Specifically, a structure of the metric device 401 may be as shown in FIG. 4, including: a first setting unit 411, an equivalent user number calculating unit 412, and a first comparing unit 413, where:

 a first setting unit 411, configured to set a threshold of a user number;

 An equivalent user number calculation unit 412, configured to calculate an equivalent number of users of the sector;

 The first comparing unit 413 is configured to compare the equivalent user number with a user number threshold. When the equivalent number of users exceeds the threshold, determine that the system is overloaded.

 Referring to FIG. 5, FIG. 5 is a schematic structural diagram of another system for adjusting user service quality according to Embodiment 5 of the present invention. The system includes a measurement device 501 and an adjustment device 502, where:

 a measuring device 501, configured to determine a load level of the system;

 The adjusting device 502 is configured to adjust a policy for allocating resources to different users according to the load condition of the system.

 Specifically, the structure of the metric device 501 includes: a second setting unit 511, a rate calculating unit 512, and a second comparing unit 513;

 a second setting unit 511, configured to set a rate threshold;

 a rate calculating unit 512, configured to calculate a user equivalent rate of the sector for measuring the forward load of the BE service in the sector, and transmit the user equivalent rate information to the second comparing unit 513;

 The second comparing unit 513 is configured to receive the user equivalent rate information from the rate calculating unit 512, and obtain forward load information of the BE service in the sector according to the user equivalent rate.

For the adjustment device shown in FIG. 4 and FIG. 5, in the case of heavy system load, the policy of allocating resources to different users is adjusted by one or any combination of the following units: dynamically adjusting the air interface scheduling parameter value of the hierarchical user Unit; some low-level or specific users will not participate in the space for a period of time A unit for port scheduling; a unit that releases some low-level or specific users' air interface connections.

 As shown in FIG. 6, another structural diagram of the metric device provided in the sixth embodiment of the present invention includes: a second setting unit 611, a rate calculating unit 612, and a second comparing unit 613;

 a second setting unit 611, configured to set a rate threshold;

 The rate calculation unit 612 further includes: a storage subunit 6121 and a calculation subunit 6122; wherein

 The storage subunit 6121 is configured to store calculation information required for calculating a user equivalent rate in the sector;

 The calculating subunit 6122 is configured to calculate a user equivalent rate of the sector by using the calculation formula; and the second comparing unit 613 further includes: an average calculating subunit 6131 and a filtering subunit

6132; Among them,

 The average calculation subunit 6131 is configured to calculate an average value AvgTh of the user equivalent rate within a preset length of time, and transmit the calculation result to the filtering subunit 6132;

 The filtering subunit 6132 is configured to perform filtering processing on the calculation result of the average value calculating subunit 6131.

 It should be noted that the details of the foregoing embodiments of the system may be referred to the content of the foregoing method embodiments, and details are not described herein again.

 In addition, the above description is directed to the case where the metric device and the adjustment device are in one system, for example, the metric device and the adjustment device are in one base station; and in practical applications, some functions of the adjustment device may also be implemented in the base station controller.

 The seventh embodiment of the present invention provides a base station controller, which can adjust policies for allocating resources to different users when the base station is heavily loaded. Specifically, the base station controller includes:

 a receiving unit, configured to receive a load level result of the base station;

 The adjusting unit is configured to release the air interface of some low-level or specific users when the base station is heavy, so as to adjust the user service quality in time.

 Similar processing can be used for other communication systems. Below, take WiMAX as an example for a brief description:

WiMAX system resources include: time domain resources represented by OFDM (Orthogonal Frequency Division Multiplexing) symbols; embodied in the form of subchannels Frequency domain resources; airspace resources in the form of multiple receive multiple output (MIMO); and power domain resources in the form of transmit power. Since the WiMAX system scheduling unit is a time slot ( _S l _0t ), one slot has 48 data subcarriers, and each subcarrier can carry 1 modulation symbol. Therefore, it is necessary to determine the number of occupied OFDM symbols in the time domain; the frequency band and the number of subchannels need to be determined in the frequency domain.

 The load metric of the WiMAX system can take the occupancy of the time slot. The number of bytes transmitted, the code modulation mode, the MIMO mode, the time-frequency resource location and the number are determined according to the load condition of the system and the QoS requirements of each stream.

 The foregoing detailed description of a method and system for adjusting user service quality provided by the present invention is only for assisting in understanding the method of the present invention and its core idea; and at the same time, for those skilled in the art, according to the present invention The scope of the present invention is not limited by the scope of the present invention.

Claims

Rights request  A method for adjusting user service quality, characterized in that:  Determine the degree of load on the system;  The policy of allocating resources to different users is adjusted according to the load level of the system.  2. A method of adjusting user service quality according to claim 1, wherein the degree of load of the system is determined in the following manner:  Set the number of users threshold;  Calculate the equivalent number of users of the sector;  Comparing the equivalent user number with the user number threshold, when the equivalent number of users exceeds the threshold, determining that the system is overloaded.  3. The method of adjusting user service quality according to claim 1, wherein the load level of the system is determined in the following manner:  Set the rate threshold;  Calculating a user equivalent rate for measuring a forward load of the best-effort BE service in the sector; comparing the user equivalent rate and the rate threshold, when the equivalent number of users exceeds the threshold, determining that the system is overloaded .  4. The method according to claim 3, wherein the step of calculating the user equivalent rate comprises:  The user equivalent rate is equal to the sum of the BE service data transmitted by all users in the sector in the preset time period divided by the sum of the user participation scheduling times of the participating BE service data transmissions in the time period.  5. The method according to claim 4, further comprising:  The user equivalent rate AvgTh is filtered. The method according to claim 5, wherein the performing the filtering process comprises: setting an average value of the user equivalent rate within the current preset time length of the sector to AvgTh(n), The average value of the user equivalent rate in the same preset time length before the preset time length is AvgTh ( n-1 ), and the weight of AvgTh ( n ) is a, then the filtering process of AvgTh ( n ) is obtained. The current user equivalent rate AvgTh ( N ) used to measure the current forward load of the BE traffic within the sector is: AvgTh ( N ) = ( l-α ) AvgTh ( n-1 ) + aAvgTh ( n ).  7. The method for adjusting user service quality according to claim 1, wherein in the case that the system is heavily loaded, the policy of allocating resources to different users is adjusted according to one or any combination of the following manners:  Dynamically adjusting the air interface scheduling parameter value of the level user;  Some low-level or specific users are not involved in air interface scheduling for a period of time;  Release some low-level or specific user air interface connections.  8. A system for adjusting user service quality, characterized in that:  Metric device for determining the load level of the system;  The adjusting device is configured to adjust a policy for allocating resources to different users according to the load level of the system.  The system according to claim 8, wherein the measuring device comprises: a first setting unit, configured to set a threshold of a user number;  An equivalent user number calculation unit, configured to calculate an equivalent number of users of the sector;  The first comparing unit is configured to compare the equivalent user number with the user number threshold. When the equivalent user number exceeds the threshold, determine that the system is overloaded.  The system according to claim 8, wherein the measuring device comprises: a second setting unit, configured to set a rate threshold;  a rate calculation unit, configured to calculate a user intra-sector equivalent rate for measuring a forward load of the BE service in the sector;  The second comparing unit is configured to compare the user equivalent rate and the rate threshold, and when the equivalent number of users exceeds the threshold, determine that the system is overloaded.  The system according to claim 10, wherein the rate calculation unit comprises: a storage subunit, configured to store calculation formula information for calculating a user equivalent rate of the sector; a calculation subunit, configured to The user equivalent rate of the sector is calculated using the calculation formula stored by the storage subunit. The system according to claim 10, wherein the second comparing unit comprises: an average calculating subunit, configured to calculate an average value AvgTh of the user equivalent rate within a preset length of time; And a filtering subunit, configured to perform filtering processing on the calculation result of the average value calculation subunit. The system according to claim 8, wherein the adjusting device adjusts a policy for allocating resources to different users by one or any combination of the following units when the system is heavily loaded:  Dynamically adjusting the unit of the air interface scheduling parameter value of the level user;  A unit that does not participate in air interface scheduling for certain low-level or specific users for a period of time; releases units of air interface with certain low-level or specific users.  14. A base station controller, comprising:  a receiving unit, configured to receive a load level result of the base station;  The adjusting unit is configured to release some low-level or specific users' empty O connections when the base station is heavily loaded.