WO2012159357A1 - 正交频分复用系统中的资源分配方法及基站 - Google Patents

正交频分复用系统中的资源分配方法及基站 Download PDF

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Publication number
WO2012159357A1
WO2012159357A1 PCT/CN2011/077810 CN2011077810W WO2012159357A1 WO 2012159357 A1 WO2012159357 A1 WO 2012159357A1 CN 2011077810 W CN2011077810 W CN 2011077810W WO 2012159357 A1 WO2012159357 A1 WO 2012159357A1
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Prior art keywords
base station
rate
csi
compensation factor
power
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PCT/CN2011/077810
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English (en)
French (fr)
Inventor
耿婷婷
陈雁
刘坚能
高静河
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华为技术有限公司
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Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to CN201180001131.6A priority Critical patent/CN103026768B/zh
Priority to PCT/CN2011/077810 priority patent/WO2012159357A1/zh
Priority to EP11865975.4A priority patent/EP2725860B1/en
Publication of WO2012159357A1 publication Critical patent/WO2012159357A1/zh
Priority to US14/167,078 priority patent/US9225569B2/en

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/26—Systems using multi-frequency codes
    • H04L27/2601—Multicarrier modulation systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H04W72/0453—Resources in frequency domain, e.g. a carrier in FDMA
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0002—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the transmission rate
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0015—Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the adaptation strategy
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0023—Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the signalling
    • H04L1/0026—Transmission of channel quality indication
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0033—Systems modifying transmission characteristics according to link quality, e.g. power backoff arrangements specific to the transmitter
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/02—Power saving arrangements
    • H04W52/0203—Power saving arrangements in the radio access network or backbone network of wireless communication networks
    • H04W52/0206—Power saving arrangements in the radio access network or backbone network of wireless communication networks in access points, e.g. base stations
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04—TPC
    • H04W52/06—TPC algorithms
    • H04W52/14—Separate analysis of uplink or downlink
    • H04W52/143—Downlink power control
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04—TPC
    • H04W52/18—TPC being performed according to specific parameters
    • H04W52/20—TPC being performed according to specific parameters using error rate
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04—TPC
    • H04W52/30—TPC using constraints in the total amount of available transmission power
    • H04W52/34—TPC management, i.e. sharing limited amount of power among users or channels or data types, e.g. cell loading
    • H04W52/346—TPC management, i.e. sharing limited amount of power among users or channels or data types, e.g. cell loading distributing total power among users or channels
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/16—Central resource management; Negotiation of resources or communication parameters, e.g. negotiating bandwidth or QoS [Quality of Service]
    • H04W28/18—Negotiating wireless communication parameters
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/16—Central resource management; Negotiation of resources or communication parameters, e.g. negotiating bandwidth or QoS [Quality of Service]
    • H04W28/18—Negotiating wireless communication parameters
    • H04W28/22—Negotiating communication rate
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/50—Allocation or scheduling criteria for wireless resources
    • H04W72/54—Allocation or scheduling criteria for wireless resources based on quality criteria
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

Definitions

  • the present invention relates to the field of mobile communications, and in particular, to a resource allocation method and a base station in an Orthogonal Frequency Division Multiplexing (OFDM) system.
  • OFDM Orthogonal Frequency Division Multiplexing
  • channel state information (CSI, Channel State)
  • CSI Channel State Information at Transmitter
  • CSIT Channel State Information at Transmitter
  • the system RRM algorithm assumes that CSIT is ideal, ignoring the mispacking problem caused by CSIT inaccuracy.
  • the inaccurate CSIT information will have an impact on the actual instantaneous channel capacity of the system, and when the system capacity cannot be determined, even if the channel coding with strong error correction is adopted, the probability of packet error will not be zero.
  • the inventor has found that the resource allocation method in the prior art has the following disadvantages:
  • the prior art does not consider the unsatisfactory problem of CSI, so that the base station tends to generate a large error rate and reduce the data transmission process.
  • System performance at the same time, the existing resource allocation method for delay-sensitive services, the total power consumption of the base station to transmit data is large, and no one considers the compromise relationship of the power delay of the base station, and reduces the total system The method of power consumption.
  • Summary of the invention The embodiments of the present invention provide a resource allocation method and a base station in an OFDM system, which are used by a base station to dynamically adjust a data transmission rate and power of each scheduling time slot, which can effectively reduce the impact of CSI inaccuracy on the system packet error rate. And reduce the total power consumption of the data transmitted by the base station.
  • the resource allocation method in the embodiment of the present invention includes: the base station acquires channel state information CSI of the current scheduling time slot; and obtains a compensation factor according to the CSI and the preset error packet rate, where the compensation factor is a preset error packet rate in the non-central card square random a corresponding value in the inverse cumulative distribution function of the variable and the non-central parameter; using the compensation factor instead of the CSI to determine a function relationship between the rate at which the base station transmits data and the power if the packet error rate of the base station is less than or equal to the preset error packet rate; The rate and total power of the data transmitted by the base station are determined according to the function relationship and the generalized dynamic back pressure algorithm, so that the total power of the base station is minimized.
  • the base station in the embodiment of the present invention includes: a first acquiring unit, configured to acquire, by the base station, channel state information CSI of the current scheduling time slot; a compensation factor determining unit, configured to obtain a compensation factor according to the CSI, where the compensation factor is a preset error packet rate The value in the inverse cumulative distribution function of the non-central chi-square random variable and the non-central parameter; the function relationship determining unit is configured to use the compensation factor instead of the CSI to determine that if the base station error rate is less than or equal to the preset error rate, the base station The relationship between the rate of transmission of data and the power; the resource allocation unit is configured to determine the rate and total power of the data transmitted by the base station according to the function relationship and the generalized dynamic back pressure algorithm, so that the total power of the base station is minimized, and the generalized dynamic back pressure algorithm is Backpressure algorithm with delay factor and power delay compromise parameters.
  • the embodiments of the present invention have the following advantages:
  • the compensation factor is determined by using the CSI and the preset error rate, and the compensation factor is used instead of the CSI to determine the function relationship between the rate and the power of the data transmitted by the base station when the error rate of the base station is less than or equal to the preset error rate.
  • the compensation factor is used to solve the error packet problem caused by the inaccuracy of the undesired CSI, and the packet error rate of the base station can be effectively controlled.
  • the function relationship and the back pressure algorithm including the delay factor and the power delay compromise parameter are used to determine the base station transmission. The rate of data and the total power minimize the total power of the base station and reduce the power consumption of the base station.
  • FIG. 1 is a schematic diagram of a resource allocation method in an OFDM system according to an embodiment of the present invention
  • FIG. 2 is another schematic diagram of a resource allocation method in an OFDM system according to an embodiment of the present invention
  • FIG. 3 is a schematic diagram of a base station according to an embodiment of the present invention
  • schematic diagram is another schematic diagram of a base station according to an embodiment of the present invention.
  • the embodiment of the present invention provides a resource allocation method and a base station in an OFDM system, where a base station determines a rate and a total power consumption of transmitting data in each scheduling time slot, and can dynamically allocate and adjust resources of different time slots. And effectively reduce the mis-packet problem caused by the inaccuracy of the unsatisfactory CSI, and can get the minimum total power consumption.
  • an embodiment of a resource allocation method in an OFDM system includes:
  • the base station acquires channel state information of a current scheduling time slot.
  • a base station performs resource allocation in units of one scheduling slot, and allocates a rate and total power of data transmitted by a base station for each scheduling slot.
  • the base station acquires CSI of the current scheduling slot subcarrier, where the CSI includes: channel quality indication information, precoding matrix indicator information, and rank indicator information.
  • the base station obtains a compensation factor according to the CSI and the preset error packet rate, wherein the compensation factor is a preset error packet rate corresponding to a cumulative distribution function of the non-central chi-square random variable and the non-central parameter. value.
  • the compensation factor is used instead of the CSI to determine the relationship between the rate at which the base station transmits data and the power if the base station error rate is less than or equal to the preset error rate.
  • the relationship between the rate and the power of the data transmitted by the base station is determined on the premise that the actual packet error rate of the base station is less than or equal to the preset packet error rate, and the CSI is effectively reduced.
  • the problem of mis-packaging caused by the ideal is determined on the premise that the actual packet error rate of the base station is less than or equal to the preset packet error rate, and the CSI is effectively reduced.
  • the base station determines the rate and total power of the base station to send data according to a function relationship and a generalized dynamic back pressure algorithm (GDBP), so that the total power of the base station is minimized
  • GDBP includes a delay factor and Back pressure of power delay compromise parameter Algorithm (DBP, Dynamic Back Pressure)
  • DBP Back pressure of power delay compromise parameter Algorithm
  • the delay factor is used to indicate the urgency of the data transmission delay
  • the power delay compromise parameter is used to represent the trade-off relationship between the data transmission power and the delay performance of the base station, including the delay factor and power. Delaying the GDBP of the compromise parameter allows the base station to determine the optimal transmit data rate and total power while considering the delay performance and power consumption requirements.
  • the total power of the transmitted data is the sum of the power of the data transmitted by the base station and the circuit power.
  • the compensation factor is determined by using CSI, and the compensation factor is used instead of CSI to determine the relationship between the rate of data transmission and the power of the base station when the packet error rate of the base station is less than or equal to the preset packet error rate, so that the base station
  • the resource allocation can be performed in consideration of the undesired CSI, and the packet error rate of the base station can be effectively controlled, and the optimal base station transmission data is determined by using the function relationship and the GDBP including the delay factor and the power delay parameter compromise parameter.
  • the rate and total power can minimize the total power consumption of the transmitted data of the base station and reduce the energy consumption.
  • FIG. 2 is an embodiment of a method for allocating resources in an OFDM system according to an embodiment of the present invention, including:
  • the base station acquires channel state information of a current scheduling time slot.
  • the base station acquires the CSI of the current scheduled time slot subcarrier, and the CSI reflects the change of the quality of the infinite transmission channel with time, which is common to different types of channel weakness (such as path loss, shadow attenuation, fast attenuation, etc.).
  • the result of the action is generally expressed as the attenuation of the amplitude of the transmitted signal and the rotation of the phase.
  • the CSI includes: channel quality indication information, precoding matrix indicator information, and rank indicator information.
  • the base station acquires the CSI on one link of the current scheduling slot.
  • CSIT refers to each independent subcarrier.
  • Channel state information, the CSIT of all subcarriers on a link constitutes the CSI of the current scheduled slot of the base station.
  • TDD time division duplex
  • a base station performs channel estimation on a channel of a subcarrier that currently schedules a time slot, and obtains a CSI of a current scheduled time slot of the base station, in frequency division duplexing (FDD, Frequency Division Duplexing).
  • FDD Frequency Division Duplexing
  • the channel state information of the base station is measured and estimated by the user terminal, and the obtained CSI is fed back to the base station by using the uplink channel information, and the base station receives the CSI of the current scheduling time slot fed back by the user terminal, where the uplink channel
  • the feedback method of information includes periodic channel information feedback and physical on the physical uplink control channel. Aperiodic channel information feedback on the uplink data sharing channel.
  • the estimated CSIT value of the nth subcarrier in the frequency domain is as follows:
  • Hn H n + AH n , AH n ⁇ CN( 0 , ⁇ );
  • AH tribe represents the error value of CSIT
  • ⁇ “ satisfies a circular symmetric Gaussian distribution with a mean of 0 and a variance of .
  • the base station obtains a compensation factor according to the CSI and the preset error packet rate, and the compensation factor is a value corresponding to the preset error packet rate in the inverse cumulative distribution function of the non-central chi-square random variable and the non-central parameter. .
  • the non-central chi-square random variable is: the non-central parameter is an inverse cumulative distribution function for the non-central chi-square random variable ⁇ and the non-central parameter, wherein the calculation formula of the non-central chi-square random variable ⁇ For:
  • ⁇ 2 — ⁇ ⁇ ( ⁇ ⁇ ⁇ ⁇ 2 , and the degree of freedom of the ⁇ is 2, and the variance is o 2 / N d ;
  • ⁇ is the number of resolution paths of the frequency selective channel, and refers to the actual number of the nth subcarrier
  • the base station obtains the cumulative distribution function determined by the non-central chi-square random variable and the non-central parameter, and obtains the cumulative distribution function by using the preset error packet rate variable, and the obtained value is the current scheduling.
  • the value of the time slot compensation factor is the cumulative distribution function determined by the non-central chi-square random variable and the non-central parameter.
  • the base station acquires the queue state information QSI of the base station of the current scheduling time slot, and the QSI refers to the total number of buffered data packets of the remaining service data in the queue at the beginning of the current scheduling time slot.
  • step 203 may be performed before or after the step 201 or may be performed simultaneously with the step 201. Therefore, in the embodiment of the present invention, the time point for obtaining the QSI is not limited.
  • the base station will use the QSI, and replace the CSI with the compensation factor to determine a function relationship between the rate and the power of the data transmitted by the base station, so that the packet error rate of the base station is less than or equal to the preset error packet rate.
  • the packet error rate of the rate r (bit/sec) of the transmitted data based on CSI and QSI is calculated.
  • the formula is:
  • the compensation factor is replaced by A and H in the above equation, and the function relationship between the rate and the power of the transmitted data of the base station is obtained as follows:
  • the rate and total power of the data transmitted by the base station are determined according to the functional relationship and the GDBP, so that the total power of the base station is minimized, wherein the GDBP includes the delay factor and the power delay.
  • the DBP of the medium parameter, using the GDBP algorithm can minimize the power consumption of the base station under the condition of ensuring queue stability.
  • the relationship between the total power g of the transmitted data and the power/ ⁇ of the transmitted data is: Wherein, it refers to the circuit power, which is independent of the rate r of the transmitted data, and is a constant value.
  • the rate at which the rate of data sent in GDBP is r is:
  • r(U , H) arg max ⁇ U a r(l - s t )At - V ⁇ P tx (r, H) + P At ⁇ ,
  • the delay factor is used to indicate the sensitivity of the service relative delay, and the value is between 0 and 1, and the delay factor is closer to 1, indicating the service delay requirement.
  • the value of the delay factor can be set according to the delay sensitivity of the service being served.
  • the power delay compromise parameter V is used to determine the trade-off between power consumption and delay performance and is a value similar to the Lagrangian multiplier.
  • the specific size that can be determined by the modeling method, and the data obtained by modeling is a method well known to those skilled in the art, and will not be described herein.
  • the base station after determining the rate and total power of the data to be transmitted, transmits the buffered service data to the user terminal according to the determined rate and the total power, and updates the number of bits of the service data of the queue buffer.
  • the resource allocation scheme in the embodiment of the present invention fully considers the inaccuracy of the undesired CSI and the total power consumption of the data transmitted by the base station, and uses the compensation factor, and the delay factor and the power delay compromise parameter.
  • GDBP determines the rate at which the base station transmits data and the total power consumption, which can effectively reduce the error packet caused by the inaccuracy of the undesired CSI, and minimize the total power consumption of the base station to transmit data.
  • FIG. 3 is an embodiment of a base station in an embodiment of the present invention, including: a first acquiring unit 301, configured to acquire, by the base station, channel state information CSI of the current scheduling time slot; the compensation factor determining unit 302 is configured to obtain a compensation factor according to the CSI and the preset error packet rate, where the compensation factor is a preset error packet rate.
  • the function relationship determining unit 303 is configured to use a compensation factor instead of the CSI to determine a function relationship between a rate at which the base station transmits data and a power rate if the packet error rate of the base station is less than or equal to the preset packet error rate, and a resource allocation unit 304, configured to: According to the function relationship and the generalized dynamic back pressure algorithm, the rate and total power of the data transmitted by the base station are determined, so that the total power of the base station is the smallest.
  • the generalized dynamic back pressure algorithm is a back pressure algorithm including a delay factor and a power delay compromise parameter.
  • the first acquiring unit 301 acquires the CSI of the current scheduling slot
  • the compensation factor determining unit 302 obtains the compensation factor according to the CSI
  • the function relationship determining unit uses the compensation factor instead of the CSI to determine the error of the base station.
  • the packet rate is less than or equal to the preset packet error rate, the relationship between the rate and the power of the data transmitted by the base station
  • the resource allocation unit 304 combines the function relationship and the generalized dynamic back pressure algorithm to determine the rate and total power of the data transmitted by the base station. The total power of the base station is minimized.
  • the compensation factor is determined by using CSI, and the compensation factor is used instead of CSI to determine the rate of data transmission of the base station when the packet error rate of the base station is less than or equal to the preset packet error rate.
  • the power function relationship enables the base station to allocate resources under consideration of undesired CSI, and can effectively control the packet error rate of the base station, and utilize the function relationship and the GDBP including the delay factor and the power delay parameter compromise parameter. Determining the optimal rate and total power of the base station to transmit data can minimize the total power consumption of the transmitted data of the base station and reduce the energy consumption.
  • FIG. 4 is an embodiment of a base station according to an embodiment of the present invention, including:
  • the first obtaining unit 301, the compensation factor determining unit 302, the function relationship determining unit 303, and the resource allocating unit 304 are similar to those described in the embodiment shown in FIG. 3, and are not described herein again. .
  • the compensation factor determining unit 302 includes:
  • An inverse cumulative distribution function determining unit 401 configured to obtain a non-central chi-square random variable and an inverse cumulative distribution function determined by the non-central parameter;
  • the compensation factor solving unit 402 is configured to solve the inverse cumulative score by using the preset error packet rate variable The cloth function determines the compensation factor.
  • the function relationship determining unit 303 includes:
  • the second obtaining unit 403 is configured to obtain the queue state information QSI of the base station of the current scheduling slot
  • the joint determining unit 404 is configured to replace the CSI with the compensation factor, and determine a function relationship between the rate and the power of the data sent by the base station according to the QSI.
  • the packet error rate of the base station is made less than or equal to the preset packet error rate.
  • the first acquiring unit 301 acquires the CSI of the current scheduling slot, and then obtains the inverse accumulation of the non-central chi-square random variable and the non-central parameter by the inverse cumulative distribution function determining unit 401 in the compensation factor determining unit 302.
  • the distribution function is solved by the compensation factor solving unit 402 by using the preset error rate as a variable to determine the compensation factor.
  • the second obtaining unit 403 in the function relationship determining unit 303 acquires the QSI of the currently scheduled slot base station, and the joint determining unit 404 replaces the CSI with the compensation factor, and determines the function relationship between the rate and the power of the base station transmitting data according to the QSI.
  • the base station error rate is less than or equal to the preset error rate.
  • the resource allocation unit 304 determines the rate and total power of the base station to send data according to the function relationship and the generalized dynamic back pressure algorithm, so that the total power of the base station is minimized.
  • the base station fully considers the error packet caused by the unsatisfactory CSI in determining the rate and power of the transmitted data, and uses the compensation factor instead of the CSI to effectively control the packet error rate of the base station and utilize the GDBP.
  • the algorithm finally determines the rate at which the base station transmits data and the total power, so that the power consumption of the base station is minimized.
  • a person skilled in the art may understand that all or part of the steps of implementing the above embodiments may be completed by a program to instruct related hardware, and the program may be stored in a computer readable storage medium, the above mentioned storage medium. It can be a read-only memory, a disk or a disc, and the like.

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  • Computer Networks & Wireless Communication (AREA)
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Abstract

正交频分复用系统中的资源分配方法及基站，用于基站进行资源分配。本发明实施例方法包括：基站获取当前调度时隙的信道状态信息CSI；根据CSI及预置误包率获得补偿因子，补偿因子是预置误包率在关于非中心卡方随机变量和非中心参数的逆累计分布函数中对应的值；利用补偿因子代替CSI，确定若基站的误包率小于或等于预置误包率，基站发送数据的速率及功率之间的函数关系；根据函数关系及广义动态背压算法确定基站发送数据的速率及总功率，使得基站的总功率最小。本发明实施例能够有效减小不理想CSI不准确性对误包率的影响，且在考虑了基站发送数据的功率时延折中关系的基础上确定发送数据的速率及功率，降低了总功耗。

Description

正交频分复用系统中的资源分配方法及基站
技术领域
本发明涉及移动通信领域， 尤其涉及正交频分复用 （OFDM, Orthogonal Frequency Division Multiplexing ) 系统中的资源分配方法及基站。 背景技术
随着通信技术的日益发展和变化， 无线技术逐步发展为宽带无线网络， 业 务也从语音服务发展到多媒体服务。 且对于诸如视频、 视频会议、 游戏等多媒 体业务的需要也在持续增长。 通常这些业务称为流业务， 对延迟服务质量 ( QoS , Quality of Service )服务质量较为敏感， 反应在无线资源管理（ RRM, Radio Resource Management )分配原则里的队列时延限制。 根据其时延要求的 不同， 针对节能， 在系统传输资源分配算法的设计上， 存在不同程度的优化空 间。
对于系统传输资源分配算法的设计， 信道状态信息 （CSI, Channel State
Information )十分重要， 在实际系统中， CSI都是不够理想的， CSI可能因为 测量时间与使用时间的不同使得精度受限不够准确， 因此，基站根据 CSI确定 的发送端的信道状态信息 （ CSIT, Channel State Information at Transmitter )也 存在不准确性， 然而， 在^艮多已有的系统传输资源分配算法的设计中， 系统的 RRM算法都假设 CSIT理想， 忽略由于 CSIT不准确带来的误包问题。 但是， CSIT信息不准确将对系统实际的即时信道容量产生影响， 且当系统容量无法 确定时， 即使采用纠错性极强的信道编码， 也不能使误包概率趋于零。
发明人在研究中发现，现有技术中的资源分配方法存在以下缺点： 现有技 术中并未考虑 CSI的不理想问题，使得基站在数据传输的过程中易产生较大的 误包率， 降低系统性能， 同时， 现有的对时延敏感业务的资源分配方法基站发 送数据的总功耗较大， 且没有一种在考虑基站的功率时延的折中关系的基础 上， 降低系统的总功耗的方法。 发明内容 本发明实施例提供了 OFDM系统中的资源分配方法及基站， 用于基站对 每个调度时隙的数据发送速率及功率进行动态调整，能够有效的减小 CSI不准 确对系统误包率的影响， 及降低基站发送数据的总功耗。
本发明实施例中的资源分配方法包括：基站获取当前调度时隙的信道状态 信息 CSI; 根据 CSI及预置误包率获得补偿因子， 补偿因子是预置误包率在关 于非中心卡方随机变量和非中心参数的逆累计分布函数中对应的值；利用补偿 因子代替 CSI, 确定若基站的误包率小于或等于预置误包率， 基站发送数据的 速率及功率之间的函数关系；根据函数关系及广义动态背压算法确定基站发送 数据的速率及总功率， 使得基站的总功率最小。
本发明实施例中的基站包括： 第一获取单元， 用于基站获取当前调度时隙 的信道状态信息 CSI; 补偿因子确定单元， 用于根据 CSI获得补偿因子， 补偿 因子是预置误包率在关于非中心卡方随机变量和非中心参数的逆累计分布函 数中的值； 函数关系确定单元， 用于利用补偿因子代替 CSI, 确定若基站的误 包率小于或等于预置误包率，基站发送数据的速率及功率之间的函数关系； 资 源分配单元，用于根据函数关系及广义动态背压算法确定基站发送数据的速率 及总功率，使得基站的总功率最小， 广义动态背压算法是包含延迟因子及功率 延迟折中参数的背压算法。
从以上技术方案可以看出， 本发明实施例具有以下优点：
通过利用 CSI及预置误包率确定补偿因子，并利用补偿因子替代 CSI确定 在基站的误包率小于或等于预置误包率时，基站发送数据的速率及功率之间的 函数关系，有效利用补偿因子解决不理想 CSI的不准确带来的误包问题，并可 有效控制基站的误包率， 同时， 利用该函数关系与包含延迟因子及功率延迟折 中参数的背压算法确定基站发送数据的速率及总功率， 使得基站的总功率最 小， 降低了基站的功耗。 附图说明
图 1为本发明实施例中 OFDM系统中的资源分配方法的一个示意图； 图 2为本发明实施例中 OFDM系统中的资源分配方法的另一示意图； 图 3为本发明实施例中基站的一个示意图； 图 4为本发明实施例中基站的另一示意图。
具体实施方式
本发明实施例提供了 OFDM系统中的资源分配方法及基站， 用于基站确 定在每个调度时隙中发送数据的速率及总功耗，能够动态的对不同时隙的资源 进行分配及调整，并且有效减小了不理想 CSI不准确带来的误包问题，且能够 得到最小的总功耗。
请参阅图 1 , 为本发明实施例中 OFDM 系统中资源分配方法的一个实施 例， 包括：
101、 基站获取当前调度时隙的信道状态信息；
在 OFDM系统中， 基站以一个调度时隙为单位进行资源分配， 分配每一 个调度时隙基站发送数据的速率及总功率。
在本发明实施例中， 基站获取当前调度时隙子载波的 CSI, CSI包括： 信 道质量指示信息， 预编码矩阵指示符信息和秩指示符信息。
102、 根据信道状态信息及预置误包率获得补偿因子；
在本发明实施例中， 基站将根据 CSI及预置误包率获得补偿因子， 其中， 补偿因子是预置误包率在关于非中心卡方随机变量和非中心参数的累积分布 函数中对应的值。
103、 利用补偿因子代替信道状态信息， 确定若基站的误包率小于或等于 预置误包率， 基站发送数据的速率及功率之间的函数关系；
基站获得补偿因子后， 将利用补偿因子代替 CSI, 确定若基站的误包率小 于或等于预置误包率， 基站发送数据的速率及功率之间的函数关系。
在本发明实施例中，是以使得基站的实际误包率小于或等于预置误包率的 为前提，确定基站发送数据的速率及功率之间的函数关系， 能够有效的减小因 CSI不理想带来的误包问题。
104、 根据函数关系及广义动态背压算法确定基站发送数据的速率及总功 率， 使得基站的总功率最小。
在本发明实施例中， 基站根据函数关系及广义动态背压算法 （GDBP, Generalized Dynamic Back Pressure )确定基站发送数据的速率及总功率， 使得 基站的总功率最小， 其中， GDBP是包含延迟因子及功率延迟折中参数的背压 算法（ DBP, Dynamic Back Pressure ), 延迟因子用于表示数据传输时延的紧迫 性， 功率延迟折中参数则用于表示基站的数据发送功率与延迟性能的折中关 系， 使用包含延迟因子及功率延迟折中参数的 GDBP, 可使得基站在考虑延迟 性能及功耗要求的前提下， 确定最优化的发送数据的速率及总功率。
在本发明实施例中，发送数据的总功率为基站发送数据的功率与电路功率 之和。
在本发明实施例中， 通过利用 CSI确定补偿因子， 利用补偿因子代替 CSI 确定在基站的误包率小于或等于预置误包率时，基站的数据发送的速率及功率 的函数关系，使得基站能够在考虑不理想 CSI的情况下进行资源的分配，并能 够有效的控制基站的误包率，同时利用该函数关系及包含延迟因子及功率延迟 参数折中参数的 GDBP确定最优的基站发送数据的速率及总功率， 能够使得 基站的发送数据的总功耗最小， 降低了能量的消耗。
为了更好的理解本发明的技术方案， 请参阅图 2, 为本发明实施例中， 一 种 OFDM系统中的资源分配方法的实施例， 包括：
201、 基站获取当前调度时隙的信道状态信息；
在本发明实施例中， 基站获取当前调度时隙子载波的 CSI, CSI反映的是 无限传输信道质量随时间的变化情况， 是不同种类信道衰弱 （比如路径损耗、 阴影衰弱、 快衰弱等）共同作用的结果， 一般表现为对发送信号幅度的衰减和 相位的旋转。 CSI包括： 信道质量指示信息， 预编码矩阵指示符信息和秩指示 符信息。
对于有多个子载波的 OFDM系统， 基站获取的是当前调度时隙一条链路 上的 CSI, 在本发明实施例中， 一条链路上有多条子载波， CSIT是指每个独 立子载波上的信道状态信息， 一条链路上的所有子载波的 CSIT构成基站当前 调度时隙的 CSI。 在时分双工（TDD, Time Division Duplexing )系统中， 基站 通过对当前调度时隙的子载波的信道进行信道估计，得到基站当前调度时隙的 CSI, 在频分双工 ( FDD, Frequency Division Duplexing ) 系统中， 将由用户终 端对基站的信道状态信息进行测量及估计， 并通过上行信道信息将得到的 CSI 反馈给基站， 基站将接收到用户终端反馈的当前调度时隙的 CSI, 其中， 上行 信道信息的反馈方式包括物理上行控制信道上的周期性信道信息反馈和物理 上行数据共享信道上的非周期性信道信息反馈。
在本发明实施例中， 若当前调度时隙有 个子载波， 则在频域中第 n个 子载波的 CSIT估计值如下：
Hn = Hn + AHn , AHn ~ CN( 0 , σ )；
其中， H„为第 η个子载波的实际 CSIT, AH„代表 CSIT的误差值， 且 ΛΗ" 满足均值为 0, 方差为 的圓对称高斯分布。
202、 根据信道状态信息及预置误包率获得补偿因子；
在本发明实施例中，基站将根据 CSI及预置误包率获得补偿因子，补偿因 子是预置误包率在关于非中心卡方随机变量和非中心参数的逆累计分布函数 中对应的值。
在本发明实施例中， 非中心卡方随机变量为 ， 非中心参数为 为 关于非中心卡方随机变量^和非中心参数 的逆累计分布函数，其中，非中心 卡方随机变量 ^的计算公式为：
Ψ2 =—∑η(ΞΐΒ \Ηη \2 , 且该 ^的自由度为 2 ， 方差为 o 2 / Nd ;
N d B
， /«是 ^个独立子载波集， ^是频率选择信道的可分辨率径数， 且 指第 n个子载波的实际的
CSIT
12 , 其中^是第 n个子载
Figure imgf000007_0001
波的 CSIT估计值。
在本发明实施例中，基站将获得非中心卡方随机变量和非中心参数确定的 累计分布函数， 并且以预置误包率为变量求解得到的累计分布函数， 求解得到 的数值即为当前调度时隙补偿因子的值。
203、 获取当前调度时隙基站的队列状态信息；
在本发明实施例中， 基站将获取当前调度时隙基站的队列状态信息 QSI, QSI 是指在当前调度时隙开始时队列中剩余业务数据的緩沖的数据包的总个 数。
需要说明的是，步骤 203还可以在步骤 201之前执行或者之后执行或者与 步骤 201同时执行， 因此， 在本发明实施例中， 获得 QSI的时间点不做限定。
204、 将补偿因子代替信道状态信息， 并根据队列状态信息确定基站发送 数据的速率及功率之间的函数关系， 使得基站的误包率小于或等于预置误包 率；
在本发明实施例中， 基站将利用 QSI, 及将补偿因子代替 CSI, 确定基站 发送数据的速率及功率之间的函数关系，使得基站的误包率小于或等于预置误 包率。
在本发明实施例中，若以基站发送数据的速率超过瞬时交互信息的概率对 误包率进行建模， 则基于 CSI和 QSI的发送数据的速率 r ( bit/sec ) 的误包率 的计算公式为：
PER(Ptx, r; H,U) = Pr[r > V log(l + P'- H" )] | [H, U]
F
其中， 是发送数据的功率， ή = φ0, ......， A„f 是在当前调度时隙内 的 CSI, U是指 QSI, 即在当前调度时隙开始时队列中剩余业务数据的緩沖的 数据包的总个数。
在本发明实施例中， 为了考虑避免不理想 CSI带来的不准确问题，需要控 制基站的误包率， 具体表现为基站的实际误码率需要小于或等于预置误码率， 因此， PERCP^ r; ^ ^/)小于或等于预置误码率 , 得到公式：
at > Pr[r > V log(l + ^ ' ' )] I [H,U]；
F
在本发明实施例中， 将补偿因子代替上式中的 A及 H„, 并求解， 得到基 站的发送数据的速率与功率之间的函数关系为：
205、 根据函数关系及广义动态背压算法确定基站发送数据的速率及总功 率， 使得基站的总功率最小。
基站获得发送数据的速率与功率之间的函数关系之后，将根据该函数关系 及 GDBP确定基站发送数据的速率及总功率， 使得基站的总功率最小， 其中， GDBP是包含延迟因子及功率延迟折中参数的 DBP, 使用 GDBP算法可以使 得在保证队列稳定性的条件下基站的功耗最小。
在本发明实施例中，发送数据的总功率 g与发送数据的功率/ ^之间的关系 为： 其中， 是指电路功率， 与发送数据的速率 r无关， 且是恒定值。
GDBP中发送数据的速率 r的公式为：
r(U , H) = arg max{Uar(l - st )At - V{Ptx (r, H) + P At} ,
其中， U是 QSI的值， 是 CSI的值， 《是延迟因子， V是功率延迟折中 数， 是预置误包率， 是电路功率， (r, )是基站发送数据的功率。 基站将 ^(r ) g {e "F 代入 GDBP的公式中， 可获得基站的发送数据 的速率和功率分别为：
Ua (l - st)F-2
r = n log
V
Figure imgf000009_0001
需要说明的是，在本发明实施例中，延迟因子用于表示业务相对时延的敏 感性， 取值在 0~1之间， 且延迟因子越趋近于 1 , 则说明业务对延迟的要求越 高， 延迟因子越趋近于 0, 则说明业务对延迟越不敏感。 在实际应用中， 延迟 因子的取值可根据所服务业务的时延敏感程度进行设置。
功率延迟折中参数 V则用于决定功耗和延迟性能之间的折中关系，是一个 类似拉格朗日乘子的值。 在实际应用中， 可通过建模的方法确定 的具体大 小，且通过建模的方式获得数据是本领域技术人员熟知的方法，此处不再赘述。
在本发明实施例中，基站确定了发送数据的速率及总功率之后，将按照确 定的速率及总功率将緩存的业务数据传输到用户终端，并更新队列緩存的业务 数据的比特数。
本发明实施例中的资源分配方案充分考虑了不理想 CSI 的不准确性及基 站发送数据的总功耗， 利用补偿因子， 及包含延迟因子和功率延迟折中参数的
GDBP确定基站发送数据的速率及总功耗，能够有效的降低不理想 CSI的不准 确性带来的误包问题， 且使得基站发送数据的总功耗最小。
-阅图 3, 为本发明实施例中基站的实施例， 包括： 第一获取单元 301 , 用于基站获取当前调度时隙的信道状态信息 CSI; 补偿因子确定单元 302, 用于根据 CSI及预置误包率获得补偿因子， 补偿 因子是预置误包率在关于非中心卡方随机变量和非中心参数的逆累计分布函 数中的值；
函数关系确定单元 303, 用于利用补偿因子代替 CSI, 确定若基站的误包 率小于或等于预置误包率， 基站发送数据的速率及功率之间的函数关系； 资源分配单元 304, 用于根据函数关系及广义动态背压算法确定基站发送 数据的速率及总功率，使得基站的总功率最小， 广义动态背压算法是包含延迟 因子及功率延迟折中参数的背压算法。
在本发明实施例中， 第一获取单元 301获取当前调度时隙的 CSI, 并由补 偿因子确定单元 302根据该 CSI获得补偿因子，接着函数关系确定单元利用补 偿因子代替 CSI, 确定若基站的误包率小于或等于预置误包率， 基站发送数据 的速率及功率之间的函数关系，并由资源分配单元 304联合该函数关系及广义 动态背压算法确定基站发送数据的速率及总功率， 使得基站的总功率最小。
在本发明实施例中， 在本发明实施例中， 利用 CSI确定补偿因子， 且利用 补偿因子代替 CSI确定在基站的误包率小于或等于预置误包率时，基站的数据 发送的速率及功率的函数关系，使得基站能够在考虑不理想 CSI的情况下进行 资源的分配， 并能够有效的控制基站的误包率， 同时利用该函数关系及包含延 迟因子及功率延迟参数折中参数的 GDBP确定最优的基站发送数据的速率及 总功率， 能够使得基站的发送数据的总功耗最小， 降低了能量的消耗。
为了更好的理解本发明的技术方案， 请参阅图 4, 为本发明实施例中基站 的实施例， 包括：
如图 3所示实施例描述的第一获取单元 301 , 补偿因子确定单元 302, 函 数关系确定单元 303 , 资源分配单元 304, 且与图 3所示实施例描述的内容相 似， 此处不再赘述。
在本发明实施例中， 补偿因子确定单元 302包括：
逆累计分布函数确定单元 401 , 用于获得非中心卡方随机变量和非中心参 数确定的逆累计分布函数；
补偿因子求解单元 402 , 用于以所述预置误包率为变量求解所述逆累计分 布函数， 确定补偿因子。
函数关系确定单元 303包括：
第二获取单元 403 , 用于获取当前调度时隙基站的队列状态信息 QSI; 联合确定单元 404, 用于将补偿因子代替 CSI, 并根据 QSI确定基站发送 数据的速率及功率之间的函数关系， 使得基站的误包率小于或等于预置误包 率。
在本发明实施例中， 第一获取单元 301获取当前调度时隙的 CSI, 再由补 偿因子确定单元 302中的逆累计分布函数确定单元 401获得非中心卡方随机变 量和非中心参数确定逆累积分布函数，由补偿因子求解单元 402以预置误包率 为变量求解该逆累积分布函数， 确定补偿因子。 接着函数关系确定单元 303 中的第二获取单元 403获取当前调度时隙基站的 QSI, 并由联合确定单元 404 将补偿因子代替 CSI,并根据 QSI确定基站发送数据的速率及功率之间的函数 关系， 使得基站的误包率小于或等于预置误包率， 最后由资源分配单元 304 根据该函数关系及广义动态背压算法确定基站发送数据的速率及总功率，使得 基站的总功率最小。
在本发明实施例中，基站在确定发送数据的速率及功率时充分考虑了不理 想 CSI不准确带来的误包问题， 利用补偿因子代替 CSI, 有效的控制基站的误 包率， 同时利用 GDBP 算法最终确定基站发送数据的速率及总功率， 使得基 站的功耗最小。
本领域技术人员可以理解实现上述实施例方法中的全部或部分步骤是可 以通过程序来指令相关的硬件完成，所述的程序可以存储于一种计算机可读存 储介质中， 上述提到的存储介质可以是只读存储器， 磁盘或光盘等。
以上对本发明所提供的正交频分复用系统中的资源分配方法及基站进行 了详细介绍， 对于本领域的技术人员， 依据本发明实施例的思想， 在具体实施 方式及应用范围上均会有改变之处， 综上所述， 本说明书内容不应理解为对本 发明的限制。

Claims

权 利 要 求
1、 一种正交频分复用系统中的资源分配方法， 其特征在于， 包括： 基站获取当前调度时隙的信道状态信息 CSI;
根据所述 CSI及预置误包率获得补偿因子，所述补偿因子是所述预置误包 率在关于非中心卡方随机变量和非中心参数的逆累计分布函数中对应的值； 利用所述补偿因子代替所述 CSI,确定若所述基站的误包率小于或等于所 述预置误包率， 基站发送数据的速率及功率之间的函数关系；
根据所述函数关系及广义动态背压算法确定所述基站发送数据的速率及 总功率，使得所述基站的总功率最小， 所述广义动态背压算法是包含延迟因子 及功率延迟折中参数的背压算法。
2、 根据权利要求 1所述的方法， 其特征在于， 所述根据所述 CSI及预置 误包率获得补偿因子，所述补偿因子是所述预置误包率在关于非中心卡方随机 变量和非中心参数的逆累计分布函数中对应的值包括：
获得所述非中心卡方随机变量和非中心参数确定的逆累计分布函数； 以所述预置误包率为变量求解所述逆累计分布函数， 确定补偿因子。
3、 根据权利要求 1所述的方法， 其特征在于， 所述利用补偿因子代替所 述 CSI, 确定若所述基站的误包率小于或等于预置误包率， 基站发送数据的速 率及功率之间的函数关系包括：
获取当前调度时隙基站的队列状态信息 QSI;
将所述补偿因子代替所述 CSI,并根据所述 QSI确定基站发送数据的速率 及功率之间的函数关系， 使得基站的误包率小于或等于预置误包率。
4、 根据权利要求 1所述的方法， 其特征在于， 所述广义动态背压算法的 公式为：
r(U , H) = arg max{Uar(l - st )At - V{Ptx (r, H) + P At}
其中， r是基站发送数据的速率， U是 QSI的值， 是 CSI的值， 《是延 迟因子， 是功率延迟折中参数， 是预置误包率， ^是电路功率， (r, )是 基站发送数据的功率。
5、 根据权利要求 1或 2所述方法， 其特征在于， 所述基站发送数据的速 率及功率之间的函数关系具体为： Ptx(r;H)
„ )
其中， 站发送数据的速率， 为当前调度时隙的子载波数，
Figure imgf000013_0001
是指预置误包率为 时， 补偿因子的值。
6、 根据权利要求 1或 4所述的方法， 其特征在于， 所述基站发送数据的 速率及总功率的公式分别为：
Figure imgf000013_0002
Ua(\-st)nF nF Ua(\-st)nF nF
0 , otherwise
其中， 为当前调度时隙的子载波数， U是 QSI的值， 《是延迟因子， V 是功率延迟折中参数， 是预置误包率， 是电路功率， ^ν(^)是指预置 误包率为 时， 补偿因子的值。
7、 根据权利要求 1所述的方法， 其特征在于， 所述基站获取当前调度时 隙的信道状态信息 CSI包括：
基站接收用户终端反馈的当前调度时隙的 CSI;
或者，
基站对当前调度时隙子载波的信道进行信道估计，得到所述当前调度时隙 的 CSI。
8、 一种基站， 其特征在于， 包括：
第一获取单元， 用于基站获取当前调度时隙的信道状态信息 CSI;
补偿因子确定单元，用于根据所述 CSI获得补偿因子，所述补偿因子是所 述预置误包率在关于非中心卡方随机变量和非中心参数的逆累计分布函数中 的值；
函数关系确定单元， 用于利用所述补偿因子代替所述 CSI, 确定若所述基 站的误包率小于或等于预置误包率，基站发送数据的速率及功率之间的函数关 系；
资源分配单元，用于根据所述函数关系及广义动态背压算法确定所述基站 发送数据的速率及总功率，使得所述基站的总功率最小， 所述广义动态背压算 法是包含延迟因子及功率延迟折中参数的背压算法。
9、 根据权利要求 8所述的基站， 其特征在于， 所述补偿因子确定单元包 括：
逆累计分布函数确定单元，用于获得所述非中心卡方随机变量和非中心参 数确定的逆累计分布函数；
补偿因子求解单元，用于以所述预置误包率为变量求解所述逆累计分布函 数， 确定补偿因子。
10、 根据权利要求 8所述的基站， 其特征在于， 所述函数关系确定单元包 括：
第二获取单元， 用于获取当前调度时隙基站的队列状态信息 QSI;
联合确定单元， 用于将所述补偿因子代替所述 CSI, 并根据所述 QSI确定 基站发送数据的速率及功率之间的函数关系，使得基站的误包率小于或等于预 置误包率。
PCT/CN2011/077810 2011-07-29 2011-07-29 正交频分复用系统中的资源分配方法及基站 WO2012159357A1 (zh)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6088335A (en) * 1995-10-05 2000-07-11 Lucent Technologies Inc. Code division multiple access system providing load and interference based demand assignment service to users
CN1870456A (zh) * 2006-06-17 2006-11-29 中国科学技术大学 一种正交频分复用系统的实时业务资源分配方法
CN1885748A (zh) * 2006-06-28 2006-12-27 中国科学技术大学 一种正交频分复用系统的混合业务资源分配方法
CN101697637A (zh) * 2009-10-22 2010-04-21 上海交通大学 Ofdma系统中资源分配方法

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7330433B2 (en) 2003-02-28 2008-02-12 Mitsubishi Electric Research Laboratories, Inc. Dynamic resource control for high-speed downlink packet access wireless channels
US8130855B2 (en) * 2004-11-12 2012-03-06 Interdigital Technology Corporation Method and apparatus for combining space-frequency block coding, spatial multiplexing and beamforming in a MIMO-OFDM system
US7804805B2 (en) 2005-06-27 2010-09-28 Samsung Electronics Co., Ltd Apparatus and method for scheduling transmission of data packets in a multichannel wireless communication system
US8902875B2 (en) 2005-08-25 2014-12-02 Broadcom Corporation Subcarrier allocation in OFDMA with imperfect channel state information at the transmitter
KR100798854B1 (ko) 2005-11-18 2008-01-29 에스케이 텔레콤주식회사 광대역 이동 액세스 시스템에서 실시간 및 비실시간 통합서비스를 지원하기 위한 적응적 지연 임계값 기반 패킷스케줄링 방법
US7409015B1 (en) 2005-11-29 2008-08-05 The United States As Represented By The Secretary Of The Army Adaptive modulation scheme based on cutoff rate with imperfect channel state information
US8112038B2 (en) 2006-09-15 2012-02-07 Futurewei Technologies, Inc. Beamforming with imperfect channel state information
US20080090564A1 (en) 2006-10-15 2008-04-17 Hamid Najafi Wireless phone module and method
US20080219364A1 (en) 2007-03-09 2008-09-11 The Hong Kong University Of Science And Technology Delay-sensitive cross layer scheduler for multi-user wireless communication systems

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6088335A (en) * 1995-10-05 2000-07-11 Lucent Technologies Inc. Code division multiple access system providing load and interference based demand assignment service to users
CN1870456A (zh) * 2006-06-17 2006-11-29 中国科学技术大学 一种正交频分复用系统的实时业务资源分配方法
CN1885748A (zh) * 2006-06-28 2006-12-27 中国科学技术大学 一种正交频分复用系统的混合业务资源分配方法
CN101697637A (zh) * 2009-10-22 2010-04-21 上海交通大学 Ofdma系统中资源分配方法

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of EP2725860A4 *

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