WO2009074095A1 - Procédé, système et appareil d'ajustement de la qualité du service aux utilisateurs - Google Patents

Procédé, système et appareil d'ajustement de la qualité du service aux utilisateurs Download PDF

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Publication number
WO2009074095A1
WO2009074095A1 PCT/CN2008/073309 CN2008073309W WO2009074095A1 WO 2009074095 A1 WO2009074095 A1 WO 2009074095A1 CN 2008073309 W CN2008073309 W CN 2008073309W WO 2009074095 A1 WO2009074095 A1 WO 2009074095A1
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WIPO (PCT)
Prior art keywords
user
equivalent
users
rate
sector
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PCT/CN2008/073309
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English (en)
Chinese (zh)
Inventor
Zhouyu Deng
Wei Li
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Huawei Technologies Co., Ltd.
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Application filed by Huawei Technologies Co., Ltd. filed Critical Huawei Technologies Co., Ltd.
Publication of WO2009074095A1 publication Critical patent/WO2009074095A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L47/00—Traffic control in data switching networks
    • H04L47/70—Admission control; Resource allocation
    • H04L47/82—Miscellaneous aspects
    • H04L47/822—Collecting or measuring resource availability data
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L47/00—Traffic control in data switching networks
    • H04L47/10—Flow control; Congestion control
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L47/00—Traffic control in data switching networks
    • H04L47/70—Admission control; Resource allocation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L47/00—Traffic control in data switching networks
    • H04L47/70—Admission control; Resource allocation
    • H04L47/80—Actions related to the user profile or the type of traffic
    • H04L47/805—QOS or priority aware
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L47/00—Traffic control in data switching networks
    • H04L47/70—Admission control; Resource allocation
    • H04L47/80—Actions related to the user profile or the type of traffic
    • H04L47/808—User-type aware

Definitions

  • the present invention relates to the field of communications technologies, and in particular, to a method, system and apparatus for adjusting user service quality.
  • 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.
  • QoS quality of service
  • the forward radio resources are mainly the utilization of time slot resources.
  • 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.
  • 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.
  • 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 embodiment of the invention provides a method for adjusting user service quality, including:
  • 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.
  • 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.
  • Embodiment 1 is a flowchart of a method for adjusting user service quality according to Embodiment 1 of the present invention
  • FIG. 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. 6 is a schematic structural diagram of a sixth measuring device according to an embodiment of the present invention.
  • 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.
  • Embodiment 1 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.
  • the method may be implemented in the following two manners, where the two methods may be used separately or in combination.
  • 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.
  • 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.
  • a sector has 3 actual users, namely, 1 gold card user, 1 card user, and 1 bronze card user.
  • the weight of gold, silver and copper is 4: 2: 1
  • 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.
  • 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.
  • 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.
  • the current user equivalent rate within the sector can be used to measure the current forward load of the BE traffic within the sector.
  • 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.
  • the rate of data R is calculated as:
  • 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.
  • D is the sum of data transmitted by all users in the sector during the time period
  • 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:
  • the equivalent number of users who have been transmitting data for the above 60s is (1+1/3).
  • 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.
  • 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 ⁇ , 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- ⁇ ) 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. .
  • the degree of load of the system can be measured more accurately.
  • the forward air interface resources are mainly time slot resources.
  • the policy of allocating resources to different users can be adjusted accordingly.
  • 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.
  • the air interface scheduling parameter is specifically a GosFactor value.
  • 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.
  • Bit Stuffing Metric 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.
  • PM Packet Metric
  • 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:
  • TSBSM Equation 1 max( £, AvgThroughput - T arg etThroughput )
  • 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:
  • TS BSM represents the priority of the data stream
  • 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
  • ⁇ 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.
  • the currently scheduled user terminal is determined by the following formula 3:
  • 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.
  • 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.
  • 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.
  • the system load condition and user level are mapped to the "GosFactor" parameter.
  • 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.
  • 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 average throughput is less than the target throughput, since ⁇ 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.
  • 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.
  • Method 3 Release some low-level or specific user air interface connections.
  • 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.
  • Embodiment 4 of the present invention provides a system for adjusting user service quality.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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
  • 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.
  • 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.
  • 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.
  • WiMAX WiMAX
  • 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.
  • OFDM Orthogonal Frequency Division Multiplexing
  • 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.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

L'invention concerne un procédé, un système et un contrôleur de station de base servant à ajuster la qualité du service aux utilisateurs. Le procédé comporte les étapes consistant à : déterminer le taux de charge du système ; ajuster la politique de répartition des ressources entre différents utilisateurs en fonction de l'état de charge du système. Le système comprend : un appareil de mesure destiné à déterminer le taux de charge du système ; un appareil d'ajustement destiné à ajuster la politique de répartition des ressources entre différents utilisateurs en fonction de l'état de charge du système. En mesurant le taux de charge du système, les modes de réalisation de l'invention permettent d'ajuster la politique de répartition des ressources entre les différents utilisateurs en fonction des divers états de taux de charge du réseau, d'assurer la qualité du service aux utilisateurs et d'améliorer le vécu des utilisateurs lorsque le système est surchargé.
PCT/CN2008/073309 2007-12-06 2008-12-03 Procédé, système et appareil d'ajustement de la qualité du service aux utilisateurs WO2009074095A1 (fr)

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CN101730155A (zh) * 2009-04-30 2010-06-09 中兴通讯股份有限公司 一种对用户进行资源控制的系统及方法
CN102118856B (zh) * 2009-12-30 2015-05-20 中兴通讯股份有限公司 中继网络系统及其下行资源分配方法
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