WO2012159507A1 - 一种部分频率复用的资源分配方法与装置 - Google Patents

一种部分频率复用的资源分配方法与装置 Download PDF

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Publication number
WO2012159507A1
WO2012159507A1 PCT/CN2012/073889 CN2012073889W WO2012159507A1 WO 2012159507 A1 WO2012159507 A1 WO 2012159507A1 CN 2012073889 W CN2012073889 W CN 2012073889W WO 2012159507 A1 WO2012159507 A1 WO 2012159507A1
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Prior art keywords
user
threshold
terminal
user attribute
modulation
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PCT/CN2012/073889
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English (en)
French (fr)
Inventor
王超
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中兴通讯股份有限公司
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Publication of WO2012159507A1 publication Critical patent/WO2012159507A1/zh

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Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W72/00Local resource management
    • H04W72/04Wireless resource allocation
    • H04W72/044Wireless resource allocation based on the type of the allocated resource
    • H04W72/0453Resources in frequency domain, e.g. a carrier in FDMA
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00Arrangements affording multiple use of the transmission path
    • H04L5/003Arrangements for allocating sub-channels of the transmission path
    • H04L5/0058Allocation criteria
    • H04L5/0073Allocation arrangements that take into account other cell interferences
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00Arrangements affording multiple use of the transmission path
    • H04L5/0091Signaling for the administration of the divided path
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W28/00Network traffic management; Network resource management
    • H04W28/16Central resource management; Negotiation of resources or communication parameters, e.g. negotiating bandwidth or QoS [Quality of Service]
    • H04W28/18Negotiating wireless communication parameters
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W88/00Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/08Access point devices

Definitions

  • the present invention relates to a wireless communication system, and more particularly to a resource allocation method and apparatus for partial frequency reuse.
  • Next-generation mobile communications (beyond 3 G/4G) will provide data transmission rates of up to 100 Mbit/s or higher, supporting services from voice to multimedia services, including real-time streaming services, and data transmission rates based on these services. The required rate is dynamically adjusted differently.
  • Another feature of the new generation of mobile communications is low cost, which enables high-speed and large-capacity on limited spectrum resources, and requires extremely high spectral efficiency.
  • OFDM Orthogonal Frequency Division Multiplexing
  • MCM Multi-Carrier Modulation
  • the orthogonal signals can be separated by using correlation techniques at the receiving end, which can reduce mutual interference between subchannels.
  • the signal bandwidth on each subchannel is smaller than the relevant bandwidth of the channel, so that each subchannel can be regarded as flat fading, thereby eliminating intersymbol interference, and since the bandwidth of each subchannel is only a small part of the original channel bandwidth, Channel equalization becomes relatively easy.
  • OFDM technology is a kind of multi-carrier modulation, and its multiple carriers are orthogonal to each other, which can efficiently utilize spectrum resources.
  • OFDM divides the total bandwidth into several narrow-band subcarriers, which can effectively resist frequency selective fading, but
  • WIMAX Worldwide Interoperability for Microwave Access, Global Interoperability for Microwave Access
  • WIMAX Forum statistics
  • WiMAX Wireless Fidelity
  • the following parameters can be used to measure the system capacity of a communication system: (1) the maximum number of users that can be simultaneously accessed in the system; (2) the average number of users that can be simultaneously accessed in the system; (3) The average load flow (kps) in the system, it can be said that the number of users that the system can accommodate and the instantaneous peak rate are very important.
  • wireless monitoring technology has been widely used.
  • wireless monitoring centers need to obtain video information of monitored points in real time, and the video information must be continuous and clear.
  • the camera is usually used to collect the scene in real time.
  • the camera is connected by the video wireless transmission device, and the data signal is sent to the monitoring center by radio waves. This technology only needs the uplink transmission of the device, and no monitoring center is needed. Feedback a large amount of downlink data.
  • the advantage of wireless is that there is no need to dig trenches, especially suitable for outdoor distances and renovated occasions; in many cases, users are often limited by geographical environment and work content, such as mountains, ports and open spaces. It is extremely inconvenient for the wired network and wired transmission wiring engineering. The construction period of the wired cable will be very long, or even impossible. At this time, the use of wireless monitoring can remove the constraints of the cable, and has the advantages of short installation period, convenient maintenance, strong capacity expansion, and rapid cost recovery. Wireless monitoring does not need to send a large amount of downlink data, and needs to upload a large amount of data in the uplink. In this case, how to achieve low cost and simple realization of large system capacity is an urgent problem to be solved.
  • the upstream bandwidth is usually designed to be smaller than the downlink bandwidth to pursue higher downlink rates, but in many application scenarios, high-speed and large-capacity uplinks are also required, as mentioned above.
  • the uplink monitoring example so how to make the most efficient use of spectrum resources and reduce hardware consumption under limited uplink spectrum resources is very practical.
  • Inter Cell Interference is an inherent problem of cellular mobile communication systems and an inevitable product of frequency reuse.
  • mobile WiMAX system cellular networks also need to determine the frequency reuse mode during network planning. And carry out frequency planning.
  • the data rate provided by the existing mobile cellular system (2G or 3G) is very different at the cell center and the cell edge. This is because the expected signal power is large inside the cell, and the interference signal is small. The best choice is to use all the frequency bands. By sacrificing bandwidth to improve the signal-to-interference ratio is not worth the loss, then the natural idea is that the cell edge reuse factor is 3, the intra-cell is intra-frequency reuse, and the partial frequency reuse (Frictional Frequency Reuse) is to solve this problem. The best solution to the problem.
  • FFR is a commonly used frequency reuse technology. It is also one of the most commonly used methods to overcome the same-frequency interference.
  • the uplink that is, the adjacent frequency band of the wireless system uses the same frequency band
  • each cell center user can schedule all sub-carrier frequencies. (Fm), while the edge user can only schedule part of the subcarrier frequency (Fb).
  • Fm sub-carrier frequencies
  • Fb subcarrier frequency
  • users who are assigned to the central part can occupy the full frequency bandwidth, while users at the edge of the three cells only occupy the full bandwidth. bandwidth.
  • the technical problem to be solved by the embodiments of the present invention is to provide a resource allocation method and device for partial frequency reuse, which uses frequency reuse technology to effectively suppress co-channel interference in a frequency band limited uplink frequency band.
  • an embodiment of the present invention provides a resource allocation method for partial frequency reuse, including:
  • the base station acquires an uplink channel parameter reported by the terminal;
  • a terminal that has been adjusted for user attributes redistributes frequency resources.
  • the uplink channel parameter includes a modulation and coding mode
  • a threshold value of the uplink channel parameter corresponding to the user attribute includes an order threshold of a modulation and coding mode corresponding to the user attribute
  • the order threshold of the modulation and coding mode corresponding to the user attribute includes an order threshold of a modulation and coding mode corresponding to the edge user;
  • the step of the base station deciding whether to adjust the user attribute of the terminal includes: if the current user attribute of the terminal is an edge user, the base station determines that the order of the modulation and coding mode reported by the terminal is greater than that of the edge user. When the order threshold of the coding mode is modulated, the decision is made to adjust the user attribute of the terminal to the central user.
  • the threshold of the modulation and coding mode corresponding to the edge user includes a first threshold and a second threshold, where the first threshold is greater than the second threshold;
  • the first threshold is used as the edge.
  • the second threshold is used as the The order threshold of the modulation coding method corresponding to the edge user.
  • the threshold value of the uplink channel parameter corresponding to the user attribute includes an order threshold of a modulation and coding mode corresponding to the center user;
  • the step of the base station deciding whether to adjust the user attribute of the terminal includes: if the current user attribute of the terminal is a central user, the base station determines that the degree of the modulation and coding mode on the terminal is smaller than that of the central user. When the order threshold of the coding mode is modulated, the decision is made to adjust the user attribute of the terminal to an edge user.
  • the threshold of the modulation and coding mode corresponding to the central user includes a first threshold and a second threshold, where the first threshold is smaller than the second threshold;
  • the step of determining whether the user attribute of the terminal is adjusted by the base station further includes: determining whether the ratio of the number of the center user and the edge user after the decision exceeds the matching threshold, and if yes, the user attribute of the part of the terminal is The central user is adjusted to the edge user so that the number of central users and edge users does not exceed the ratio threshold.
  • the adjusting, by using the user attribute of the part of the terminal specifically includes:
  • the method further includes: configuring, when the terminal initially accesses the cell, the user attribute of the terminal as an edge user.
  • the embodiment of the present invention further provides a device for allocating part frequency reuse resources, which is applied to a base station, and includes:
  • An obtaining module configured to: obtain an uplink channel parameter reported by the terminal;
  • a decision module configured to: determine, according to the uplink channel parameter and a threshold value of an uplink channel parameter corresponding to a current user attribute of the terminal, whether to adjust a user attribute of the terminal, where the user attribute includes a central user And marginal users;
  • An allocation module which is configured to: Reassign frequency resources to terminals that have been adjusted for user attributes.
  • the uplink channel parameter includes a modulation and coding mode
  • a threshold value of the uplink channel parameter corresponding to the user attribute includes an order threshold of a modulation and coding mode corresponding to the user attribute.
  • the order threshold of the modulation and coding mode corresponding to the user attribute includes an order threshold of a modulation and coding mode corresponding to the edge user, and the current user attribute of the terminal is an edge user.
  • the decision module is configured to determine whether to adjust the user attribute of the terminal in the following manner: when the order threshold of the mode is used, the decision is to adjust the user attribute of the terminal to a central user, where the edge user corresponds to the modulation
  • the order threshold of the coding mode includes a first threshold and a second threshold, where the first threshold is greater than the second threshold, for example, the current user attribute of the terminal is an edge user, and the reported uplink channel parameter includes virtual multiple input multiple output type information.
  • the decision module is When the decision is made to adjust the user attribute of the terminal, the first threshold is used as the threshold of the modulation coding mode corresponding to the edge user; if the current user attribute of the terminal is an edge user, and the reported uplink channel parameter is not included
  • the second threshold is used as the order threshold of the modulation and coding mode corresponding to the edge user.
  • the threshold of the uplink channel parameter corresponding to the user attribute includes an order threshold of a modulation and coding mode corresponding to the central user, and the current user attribute of the terminal is a central user.
  • the decision module is configured to determine whether to adjust the user attribute of the terminal in the following manner: when determining that the order of the modulation and coding mode reported by the terminal is smaller than the order threshold of the modulation and coding mode corresponding to the central user, Adjusting the user attribute of the terminal to an edge user, where the threshold of the modulation coding mode corresponding to the central user includes a first threshold and a second threshold, where the first threshold is smaller than the second threshold;
  • the user attribute is a central user, and the reported uplink channel parameter includes virtual multiple input multiple output type information, and the decision module determines the first threshold as the central user when deciding whether to adjust the user attribute of the terminal.
  • the order threshold of the modulation coding mode if the current user attribute of the terminal is the central user, and the reported uplink channel parameter does not include the virtual multiple input multiple output type information, when the base station decides whether to adjust the user attribute of the terminal,
  • the second threshold is used as a modulation and coding mode corresponding to the edge user Order threshold.
  • the device further includes:
  • the configuration module is configured to: configure the user attribute of the terminal as an edge user when the terminal initially accesses the cell.
  • the device further includes:
  • the equalization module is configured to: determine whether the ratio of the number of central users and edge users after the decision exceeds the matching threshold, and if yes, adjust the user attributes of some terminals from the central user to the edge users, so that the central user and the edge The number of users does not exceed the ratio threshold.
  • the embodiments of the present invention provide a resource allocation method and apparatus for partial frequency multiplexing, which can use frequency multiplexing technology to effectively suppress co-channel interference and full-band resources for an uplink frequency band with limited frequency. Partial band resources are effectively load balanced.
  • Figure 1 is a schematic diagram of the FFR principle
  • FIG. 2 is a schematic diagram of an apparatus for FFR resource allocation according to an embodiment of the present invention.
  • FIG. 3 is a flowchart of a partial frequency reuse resource allocation method according to the present invention.
  • FIG. 4 is a schematic diagram of a frequency spectrum of a WIMAX uplink frame according to an embodiment of the present invention. Preferred embodiment of the invention
  • FIG. 2 is a schematic diagram of an apparatus for FFR resource allocation according to an embodiment of the present invention. As shown in FIG. 2, the apparatus in this embodiment is applied to a base station, and may include:
  • a decision module configured to determine, according to the uplink channel parameter and a threshold value of an uplink channel parameter corresponding to a current user attribute of the terminal, whether to adjust a user attribute of the terminal, where the user attribute includes a center user and an edge user;
  • the allocation module which is set to re-allocate spectrum resources for terminals whose user attributes have been adjusted.
  • the frequency reuse technique can effectively suppress the co-channel interference for the frequency band with limited frequency.
  • the uplink channel parameters in this embodiment include a modulation and coding mode, and may of course be other parameters, such as BER (Bit Error Rate), received signal to interference ratio, CQI (Channel Quality Indicator),
  • the uplink channel parameter in this embodiment includes a modulation and coding mode
  • the threshold value of the uplink channel parameter corresponding to the user attribute includes an order threshold of a modulation and coding mode corresponding to the user attribute.
  • the decision module is set to Determine whether to adjust the user attribute of the terminal Whether the order of the modulation and coding mode reported by the terminal is greater than the order threshold of the modulation and coding mode corresponding to the edge user, and if the value is greater than, the decision is made to adjust the user attribute of the terminal to the central user, where
  • the threshold of the modulation coding mode corresponding to the edge user includes a first threshold and a second threshold, where the first threshold is greater than the second threshold, for example, the current user attribute of the terminal is an edge user, and the reported uplink channel parameters include
  • the decision module determines the first threshold as the order threshold of the modulation and coding mode corresponding to the edge user when deciding whether to adjust the user attribute of the terminal.
  • the threshold of the uplink channel parameter corresponding to the user attribute includes an order threshold of the modulation and coding mode corresponding to the central user, and the current user attribute of the terminal is the central user,
  • the determining module is configured to determine, when the user attribute of the terminal is adjusted, whether the order of the modulation and coding mode reported by the terminal is smaller than an order threshold of the modulation and coding mode corresponding to the central user, such as less than , the decision is to adjust the user attribute of the terminal to an edge user, where
  • the order threshold of the modulation and coding mode corresponding to the central user includes a first threshold and a second threshold, where the first threshold is smaller than the second threshold; if the current user attribute of the terminal is the central user, and the reported uplink channel parameters include
  • the decision module determines the first threshold as the order threshold of the modulation and coding mode corresponding to the central user when deciding whether to adjust the user attribute of the terminal.
  • the device may include, in addition to the modules in the foregoing embodiments, the following:
  • the configuration module is configured to determine that the terminal initially accesses the cell, and configure the user attribute of the terminal as an edge user.
  • the device may include, in addition to the modules in the foregoing embodiments, the following:
  • the equalization module is configured to determine whether the ratio of the number of central users and edge users after the decision exceeds the matching threshold, and if yes, adjust the user attributes of some terminals from the central user to the edge users, so that the central user and the edge user The quantity ratio does not exceed the ratio threshold.
  • the equalization module adjusts the user attributes of the part of the terminal, including: obtaining a minimum guaranteed quality of the quality of each terminal, and sorting the terminals according to the minimum guaranteed rate of the quality of service (in order from small to large), Adjust the user attributes of the last one or more terminals.
  • the embodiment of the present invention can also perform effective load balancing on the full-band resource and the partial-band resource.
  • the so-called load balancing is to make the load resource allocation within the cell reasonable, thereby maximizing the utilization of the frequency resource, that is, allocating to the inner ring.
  • the load on the outer ring and the outer ring cannot be too much or too little. Load balancing needs to be controlled by the equalization threshold.
  • the device of the embodiment of the present invention can improve the uplink system capacity, does not require dynamic complex operations, and also slows the delay waiting with power control, and reduces the complexity of hardware implementation.
  • FIG. 3 is a flowchart of a partial frequency reuse resource allocation method according to an embodiment of the present invention. As shown in FIG. 3, the method includes the following steps:
  • the base station acquires an uplink channel parameter reported by the terminal.
  • the base station determines, according to the uplink channel parameter and a threshold value of an uplink channel parameter that is corresponding to the current user attribute of the terminal, whether to adjust a user attribute of the terminal, where the user attribute includes a center user and an edge user.
  • the terminal that adjusts the user attribute re-allocates the spectrum resource.
  • the frequency multiplexing technique can effectively suppress the co-channel interference by the method of the present invention for the uplink frequency band with limited frequency.
  • step S20 the step of determining, by the base station, whether to adjust the user attribute of the terminal further includes: determining whether the ratio of the number of the center user and the edge user after the decision exceeds the matching threshold, and if yes, the user attribute of the part of the terminal Adjust from the central user to the edge user so that the number of central users and edge users does not exceed the ratio threshold.
  • the reported uplink channel parameter includes a modulation and coding mode
  • the threshold value of the uplink channel parameter corresponding to the user attribute includes an order threshold of a modulation and coding mode corresponding to the user attribute
  • the base station determines whether to adjust an order threshold of the modulation and coding mode corresponding to the terminal user, and if yes, decides to adjust the user attribute of the terminal to the central user. among them,
  • the order threshold of the modulation and coding mode corresponding to the edge user includes a first threshold and a second threshold, where the first threshold is greater than the second threshold;
  • the first threshold is used as the edge.
  • the order threshold of the modulation coding mode corresponding to the user when the reported uplink channel parameter does not include the virtual multiple input multiple output type information, the second threshold is used as the order threshold of the modulation coding mode corresponding to the edge user.
  • the threshold of the uplink channel parameter corresponding to the user attribute includes an order threshold of a modulation and coding mode corresponding to the central user
  • the base station determines whether the user attribute of the terminal is adjusted, and determines whether the order of the modulation and coding mode reported by the terminal is smaller than the modulation and coding mode corresponding to the central user.
  • the order threshold if less than, is determined to adjust the user attribute of the terminal to an edge user. among them,
  • the order threshold of the modulation and coding mode corresponding to the central user includes a first threshold and a second threshold, where the first threshold is smaller than the second threshold;
  • the first threshold is used as the center.
  • the order threshold of the modulation coding mode corresponding to the user when the uplink channel parameter of the uplink does not include the virtual multiple input multiple output type information, the second threshold is used as the order threshold of the modulation coding mode corresponding to the edge user.
  • the method in the embodiment of the present invention can also perform effective load balancing on the full-band resources and the partial-band resources, thereby maximizing the utilization of the frequency resources.
  • a WIMAX uplink frame based on the IEEE802.16 protocol is cited as an example, as shown in FIG. 4, WIMAX.
  • the upstream frame except the Ranging area is the Burst area in which data is transmitted.
  • the inner ring indicates that all frequency resources can be used by the central user
  • the outer ring indicates that the system frequency resource is divided into three segments, and each base station uses a partial frequency band to reduce each base station.
  • Interference that is, the full frequency band of Fm is divided into three disjoint frequency bands (also called isolation bands).
  • the frequencies Fb1, Fb2, and Fb3 shown in Fig. 1 indicate three pieces of disjoint band resources in three different patterns, that is, the case where the multiplexing factor mentioned in the background art is three.
  • the outer ring (edge user) and the inner ring (the center user) are all attributes of the user accessing the cell, and the base station with the frequency multiplexing technology will immediately access the cell in the user. At the time, all the properties of all terminals are set to 'outer ring,'.
  • MCS modulation and coding
  • BPSK Binary Phase Shift Keying
  • QPSK Quadrature Phase Shift Keying
  • 16QAM Quadature Amplitude Modulation
  • 64QAM 64QAM
  • MCS modulation and coding
  • Multiple-Input Multiple Output Multi-Input Multiple Output
  • QoS Quality of Service
  • the so-called decision result means that the user wants to switch from the attribute of the outer ring, to the attribute of the inner ring, and which users continue to remain.
  • the equalization module judges the internal and external loop attributes of the user according to the empirical threshold, sorting the user level and other parameters, thereby effectively utilizing the frequency resources and increasing the system capacity.
  • the vertical direction indicates the full frequency band
  • the X area indicates that the entire frequency band is divided into three segments of disjoint frequency band resources.
  • Step 101 All the initial accesses of the terminal are in the outer ring, and the user attribute of the terminal is configured as an 'outer ring (edge user), as shown in FIG. 1 , and allocated to the terminal whose user attribute is an edge user.
  • the frequency may be any one of the Fbl, Fb2, and Fb3 frequency bands, and the outer ring attribute of the area is used when the access time falls into which area;
  • Step 102 After the terminal accesses for a period of time, the base station acquires the MCS and the virtual MIMO type of all terminals in a fixed period, and determines whether to adjust the user attribute of the terminal, and update all internal and external ring resource utilization situations, that is, update the number of central users and edge users. .
  • the terminal is currently in the outer ring and the user attribute is the edge user, it is determined whether the order of the MCS of the terminal is higher than the threshold value of the outer ring area (Outter_MCS). If it is higher, the user attribute of the terminal is determined. Adjust to a central user. 4.
  • the current Outter-MCS value in the system is 16QAM-CTC (Convolutional Turbo Code); if the terminal enables the virtual MIMO transmission mode, the reported uplink channel parameters include virtual MIMO information, then Outter – The value of MCS is 64QAM-CTC.
  • the terminal is currently in the inner ring and the user attribute is the central user, it is determined whether the order of the MCS on the terminal is lower than the inner value of the inner ring area (Inner-MCS), and if it is lower, the user of the terminal is determined. The property is adjusted to the edge user. If the system implements the Inner-MCS value as 16QAM-CTC, if the virtual MIMO transmission mode is enabled in the terminal and the reported uplink channel parameters include virtual MIMO information, the Inner-MCS value is QPSK-CTC.
  • the inner and outer rings are each provided with a threshold value, and the inner and outer ring attributes of the final terminal are determined according to the threshold range, and the specific values of the threshold values are determined. It is through a lot of tests, simulation accumulated empirical value, it is very practical and worthwhile.
  • Step 103 Determine whether the ratio of the number of the center user and the edge user exceeds the matching threshold. If yes, obtain the minimum guaranteed QoS rate of each terminal, and sort the terminal according to the minimum guaranteed rate of Qos, and rank the last one or The user attributes of multiple terminals are adjusted until the number of center users and edge users does not exceed the ratio threshold.
  • the ratio of the ratio threshold is preferably a value between the range of [4:1, 8:1].
  • Embodiments of the present invention provide a resource allocation method and apparatus for partial frequency reuse, which can use frequency multiplexing technology to effectively suppress co-channel interference and full-band resources for an uplink frequency band with limited frequency. Partial band resources are effectively load balanced.

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Abstract

一种部分频率复用的资源分配方法及装置,该方法包括:基站获取终端上报的上行信道参数;根据所述上行信道参数和所述终端当前的用户属性对应的上行信道参数的门限值,决策是否调整所述终端的用户属性,其中,所述用户属性包括中心用户和边缘用户;为用户属性进行了调整的终端重新分配频率资源。该方法和装置,对于频率有限的上行频带来说能够采用频率复用技术以有效抑制同频干扰,又能对全频带资源和部分频带资源进行有效的负载均衡。

Description

一种部分频率复用的资源分配方法与装置
技术领域
本发明涉及无线通信系统, 更具体地, 涉及一种部分频率复用的资源分 配方法及装置。
背景技术
新一代移动通信 (beyond 3 G/4G)将可以提供的数据传输速率高达 100Mbit/s, 甚至更高, 支持的业务从语音到多媒体业务, 包括实时的流媒体 业务, 数据传输速率可以根据这些业务所需的速率不同动态调整。 新一代移 动通信的另一个特点是低成本, 这样在有限的频谱资源上实现高速率和大容 量, 需要频谱效率极高的技术, OFDM ( Orthogonal Frequency Division Multiplexing, 正交频分复用)技术综合了上述特点。 OFDM技术实际上是 MCM ( Multi-Carrier Modulation, 多载波调制)的一种, 其主要思想是: 将信 道分成若干正交子信道, 将高速数据信号转换成并行的低速子数据流, 调制 到每个子信道上进行传输。正交信号可以通过在接收端釆用相关技术来分开, 这样可以减少子信道之间的相互干扰。 每个子信道上的信号带宽小于信道的 相关带宽, 因此每个子信道上的可以看成平坦性衰落, 从而可以消除符号间 干扰, 而且由于每个子信道的带宽仅仅是原信道带宽的一小部分, 信道均衡 变得相对容易。
OFDM技术是多载波调制的一种, 其多载波之间相互正交, 可以高效地 利用频谱资源, 另外, OFDM将总带宽分割为若干个窄带子载波可以有效地 抵抗频率选择性衰落, 但是随着无线通信的高速发展, 比如基于 OFDM系统 的 WIMAX ( Worldwide Interoperability for Microwave Access, !¾波接入全球 互通系统 ) , 根据 WIMAX Forum (论坛 )的统计, 在全球已经有 135个国家 的 455个 WiMAX网络进入商用, 还有大量国家将陆续颁发 WiMAX牌照。 各个国家和地区所颁发的 WiMAX牌照的带宽资源都是不同的, 有些国家牌 照所包含的带宽资源很丰富,例如,瑞典在 2.5GHz频段颁发了 50MHz的 TDD ( Time Division Duplexing, 时分双工)频点, 日本颁发的牌照具有 30MHz 带宽; 有些国家牌照所包含的带宽资源却很少, 例如印度只有 20MHz带宽, 新加坡某运营商只有 12MHz带宽等。 当 WiMAX带宽资源非常有限, 如何最 大化利用频率资源, 提供最佳的容量和覆盖性能的移动蜂窝网络是运营商期 望各大通信制造商提供的有效解决方案。 在频率资源受限的情况下, 依然需 要保持系统容量的坚挺, 着实对开发厂商提出了更高的要求。
从通信角度,可以用以下几个参数去衡量一个通信系统的系统容量: ( 1 ) 系统中最大能同时接入的用户数; (2 )系统中平均能同时接入的用户数; (3 ) 系统中平均能负载的流量(kps ) , 可以说系统能容纳的用户数和瞬间的峰值 速率是非常重要的。
近年来, 对下行的系统容量关注要明显大于上行, 但是在某些特殊场景 下, 对上行的容量要求是非常大的, 比如无线视频监控场景。 近些年来, 无 线监控技术应用广泛, 在无线监控系统中, 无线监控中心需要实时得到被 监控点的视频信息, 并且该视频信息必须是连续、 清晰的。 在无线监控点, 通常使用摄像头对现场情况进行实时釆集, 摄像头通过视频无线传输设备 相连, 并通过由无线电波将数据信号发送到监控中心, 这种技术只需要设 备的上行传输, 无需监控中心反馈大量的下行数据。 无线的好处在于无须 挖沟埋管, 特别适合室外距离较远及已装修好的场合; 在许多情况下, 用 户往往由于受到地理环境和工作内容的限制, 例如山地、 港口和开阔地等 特殊地理环境, 对有线网络、 有线传输的布线工程带来极大的不便, 釆用 有线的施工周期将很长, 甚至根本无法实现。 这时, 釆用无线监控可以摆 脱线缆的束缚, 有安装周期短、 维护方便、 扩容能力强, 迅速收回成本的 优点。 无线监控不需要发送大量下行数据, 需要上行大量上传数据, 对于 这种情况来说, 如何能低成本, 简单实现大系统容量是急待解决的问题。
对于使用 OFDM系统的无线通信产品来说,通常上设计上行带宽都要小 于下行带宽, 以追求更高的下行速率, 但是在很多应用场景中也需要上行的 高速率大容量, 就像上面提到过的上行监控实例, 所以如何在有限的上行频 谱资源下, 使频谱资源得到最有效的利用, 并降低硬件消耗, 是非常具有现 实意义的。
频谱资源有限带来的直接问题就是同频干扰问题, 同频小区之间干扰 ( Inter cell interference, 简称 ICI )是蜂窝移动通信系统的一个固有问题, 是 频率复用的必然产物, 和其他蜂窝通信系统一样, 移动 WiMAX系统蜂窝组 网在网络规划时也需要确定频率复用模式, 并进行频率规划。
现有的移动蜂窝系统(2G或 3G )所提供的数据速率在小区中心和小区 边缘有很大差异, 这是因为小区内部期望信号功率大, 干扰信号小, 最佳的 选择就是要使用所有频带, 通过牺牲带宽来提高信干比是得不偿失的, 那么 自然的想法就应该是小区边缘釆用复用因子为 3 , 小区内部为同频复用, 部 分频率复用 ( Fractional Frequency Reuse )是解决此问题的最佳方案。
FFR是一种常用的频率复用技术, 也是常用的克服同频干扰的最常用手 段之一, 在无线系统的上行即相邻扇区使用相同频段, 各小区中心用户可以 调度到全部子载波频率(Fm ) , 而边缘用户只能调度部分子载波频率(Fb ) , 如图 1所示, 分到中心部分的用户可以占有全频率带宽, 而在 3个小区边缘 的用户只占有全带宽的部分带宽。
目前很多公司釆用传统的解决方法是釆用带有复杂功率控制的 FFR技 术, 例如华为爱立信等公司都提出过基于部分功率控制的软频率复用技术 ( SFR ) , 但该技术需要动态调整副载波与主载波的功率门限的比值以适应 负载在小区内部和小区边缘的分布, 不断的动态调整这种方案给实现带来较 高的复杂度, 而且会造成系统不稳定。 发明内容
本发明实施例要解决的技术问题是提供一种部分频率复用的资源分配方 法及装置, 以针于频率有限的上行频带, 釆用频率复用技术来有效抑制同频 干扰。
为了解决上述技术问题, 本发明实施例提供了一种部分频率复用的资源 分配方法, 包括:
基站获取终端上报的上行信道参数;
根据所述上行信道参数和所述终端当前的用户属性对应的上行信道参数 的门限值, 决策是否调整所述终端的用户属性, 其中, 所述用户属性包括中 心用户和边缘用户; 以及
为用户属性进行了调整的终端重新分配频率资源。
可选的, 所述上行信道参数包括调制编码方式, 所述用户属性对应的上 行信道参数的门限值包括用户属性对应的调制编码方式的阶数门限。
可选的, 所述用户属性对应的调制编码方式的阶数门限包括边缘用户对 应的调制编码方式的阶数门限;
所述基站决策是否调整所述终端的用户属性的步骤包括: 如所述终端当 前的用户属性为边缘用户, 所述基站判断所述终端上报的调制编码方式的阶 数大于所述边缘用户对应的调制编码方式的阶数门限时, 则决策将所述终端 的用户属性调整为中心用户。
可选的, 所述边缘用户对应的调制编码方式的阶数门限包括第一门限和 第二门限, 其中第一门限大于第二门限;
如所述终端当前的用户属性为边缘用户, 且上报的上行信道参数包括虚 拟多输入多输出类型信息, 则所述基站决策是否调整终端的用户属性时, 将 所述第一门限作为所述边缘用户对应的调制编码方式的阶数门限;
如所述终端当前的用户属性为边缘用户, 且上报的上行信道参数不包括 虚拟多输入多输出类型信息, 则所述基站决策是否调整终端的用户属性时 , 将所述第二门限作为所述边缘用户对应的调制编码方式的阶数门限。
可选的, 所述用户属性对应的上行信道参数的门限值包括中心用户对应 的调制编码方式的阶数门限;
所述基站决策是否调整所述终端的用户属性的步骤包括: 如所述终端当 前的用户属性为中心用户, 所述基站判断所述终端上 的调制编码方式的阶 数小于所述中心用户对应的调制编码方式的阶数门限时, 则决策将所述终端 的用户属性调整为边缘用户。
可选的, 所述中心用户对应的调制编码方式的阶数门限包括第一门限和 第二门限, 其中第一门限小于第二门限;
如所述终端当前的用户属性为中心用户, 且上报的上行信道参数包括虚 拟多输入多输出类型信息, 则所述基站决策是否调整终端的用户属性时, 将 所述第一门限作为所述中心用户对应的调制编码方式的阶数门限。 可选的, 所述基站决策是否调整终端的用户属性的步骤还包括: 判断决策后的中心用户和边缘用户的数量比是否超出配比门限值, 如超 出, 则将部分终端的用户属性从中心用户调整为边缘用户, 使中心用户和边 缘用户的数量比不超出所述配比门限值。
可选的, 所述对部分终端的用户属性进行调整, 具体包括:
获取各终端的服务质量最小保证速率, 按照服务质量最小保证速率的从 小到大对终端进行排序 ,对排在最后的一个或多个终端的用户属性进行调整。
可选的, 所述基站获取终端上报的上行信道参数之前, 所述方法还包括: 在所述终端初始接入小区时将所述终端的用户属性配置为边缘用户。 本发明实施例还提供一种部分频率复用资源分配的装置,应用于基站中, 其包括:
获取模块, 其设置为: 用于获取终端上报的上行信道参数;
决策模块, 其设置为: 根据所述上行信道参数和所述终端当前的用户属 性对应的上行信道参数的门限值, 决策是否调整所述终端的用户属性, 其中, 所述用户属性包括中心用户和边缘用户; 以及
分配模块, 其设置为: 为用户属性进行了调整的终端重新分配频率资源。 可选的, 所述上行信道参数包括调制编码方式, 所述用户属性对应的上 行信道参数的门限值包括用户属性对应的调制编码方式的阶数门限。
可选的, 所述用户属性对应的调制编码方式的阶数门限包括边缘用户对 应的调制编码方式的阶数门限, 所述终端当前的用户属性为边缘用户,
所述决策模块是设置为以如下方式决策是否调整所述终端的用户属性: 方式的阶数门限时, 则决策将所述终端的用户属性调整为中心用户, 其中, 所述边缘用户对应的调制编码方式的阶数门限包括第一门限和第二门 限, 其中第一门限大于第二门限, 如所述终端当前的用户属性为边缘用户, 且上报的上行信道参数包括虚拟多输入多输出类型信息, 则所述决策模块在 决策是否调整终端的用户属性时, 将所述第一门限作为所述边缘用户对应的 调制编码方式的阶数门限; 如所述终端当前的用户属性为边缘用户, 且上报 的上行信道参数不包括虚拟多输入多输出类型信息, 则所述基站决策是否调 整终端的用户属性时, 将所述第二门限作为所述边缘用户对应的调制编码方 式的阶数门限。
可选的, 所述用户属性对应的上行信道参数的门限值包括中心用户对应 的调制编码方式的阶数门限, 所述终端当前的用户属性为中心用户,
所述决策模块是设置为以如下方式决策是否调整所述终端的用户属性: 判断所述终端上报的调制编码方式的阶数小于所述中心用户对应的调制编码 方式的阶数门限时, 则决策将所述终端的用户属性调整为边缘用户, 其中, 所述中心用户对应的调制编码方式的阶数门限包括第一门限和第二门 限, 其中第一门限小于第二门限; 如所述终端当前的用户属性为中心用户, 且上报的上行信道参数包括虚拟多输入多输出类型信息, 则所述决策模块在 决策是否调整终端的用户属性时, 将所述第一门限作为所述中心用户对应的 调制编码方式的阶数门限, 如所述终端当前的用户属性为中心用户, 且上报 的上行信道参数不包括虚拟多输入多输出类型信息, 则所述基站决策是否调 整终端的用户属性时, 将所述第二门限作为所述边缘用户对应的调制编码方 式的阶数门限。
可选的, 所述装置还包括:
配置模块, 设置为: 在所述终端初始接入小区时将所述终端的用户属性 配置为边缘用户。
可选的, 所述装置还包括:
均衡模块, 其设置为: 判断决策后的中心用户和边缘用户的数量比是否 超出配比门限值, 如超出, 则将部分终端的用户属性从中心用户调整为边缘 用户, 使中心用户和边缘用户的数量比不超出该配比门限值。
综上, 本发明实施例提供一种部分频率复用的资源分配方法及装置, 对 于频率有限的上行频带来说能够釆用频率复用技术以有效抑制同频干扰, 又 能对全频带资源和部分频带资源进行有效的负载均衡。 附图概述
图 1为 FFR原理示意图;
图 2为本发明实施例的一种 FFR资源分配的装置的示意图;
图 3为本发明的一种部分频率复用的资源分配方法的流程图;
图 4为本发明实施例的 WIMAX上行帧的频谱示意图。 本发明的较佳实施方式
下文中将结合附图对本发明的实施例进行详细说明。 需要说明的是, 在 不冲突的情况下, 本申请中的实施例及实施例中的特征可以相互任意组合。
图 2为本发明实施例的一种 FFR资源分配的装置的示意图,如图 2所示, 本实施例的装置应用于基站中, 可以包括:
获取模块, 设置为周期获取终端上报的上行信道参数;
决策模块, 设置为根据所述上行信道参数和所述终端当前的用户属性对 应的上行信道参数的门限值, 决策是否调整终端的用户属性, 其中, 所述用 户属性包括中心用户和边缘用户;
分配模块, 设置为为用户属性进行了调整的终端重新分配频谱资源。 这样, 当在某个釆用 OFDM系统的终端, 对于频率有限的上行频带来说 可以釆用频率复用技术有效抑制同频干扰。
本实施例中的上行信道参数包括调制编码方式,当然还可以是其他参数, 例如, BER ( Bit Error Rate, 误比特率) , 接收信号信干比, CQI (信道质量 指示) ,
本实施例中的所述上行信道参数包括调制编码方式, 所述用户属性对应 的上行信道参数的门限值包括用户属性对应的调制编码方式的阶数门限。
其中, 若所述用户属性对应的调制编码方式的阶数门限包括边缘用户对 应的调制编码方式的阶数门限, 所述终端当前的用户属性为边缘用户, 则 所述决策模块是设置为, 在决策是否调整所述终端的用户属性时, 判断 所述终端上报的调制编码方式的阶数是否大于所述边缘用户对应的调制编码 方式的阶数门限, 如大于, 则决策将所述终端的用户属性调整为中心用户, 其中,
所述边缘用户对应的调制编码方式的阶数门限包括第一门限和第二门 限, 其中第一门限大于第二门限, 如所述终端当前的用户属性为边缘用户, 且上报的上行信道参数包括虚拟多输入多输出类型信息, 则所述决策模块在 决策是否调整终端的用户属性时, 将所述第一门限作为所述边缘用户对应的 调制编码方式的阶数门限。
其中, 若所述用户属性对应的上行信道参数的门限值包括中心用户对应 的调制编码方式的阶数门限, 所述终端当前的用户属性为中心用户, 则
所述决策模块, 是设置为在决策是否调整所述终端的用户属性时, 判断 所述终端上报的调制编码方式的阶数是否小于所述中心用户对应的调制编码 方式的阶数门限, 如小于, 则决策将所述终端的用户属性调整为边缘用户, 其中,
所述中心用户对应的调制编码方式的阶数门限包括第一门限和第二门 限, 其中第一门限小于第二门限; 如所述终端当前的用户属性为中心用户, 且上报的上行信道参数包括虚拟多输入多输出类型信息, 则所述决策模块在 决策是否调整终端的用户属性时, 将所述第一门限作为所述中心用户对应的 调制编码方式的阶数门限。
在一优选实施例中, 所述装置除包括上述实施例中的模块外, 还可以包 括:
配置模块, 设置为判断所述终端初始接入小区, 则将所述终端的用户属 性配置为边缘用户。
在一优选实施例中, 所述装置除包括上述实施例中的模块外, 还可以包 括:
均衡模块, 设置为判断决策后的中心用户和边缘用户的数量比是否超出 配比门限值, 如超出, 则将部分终端的用户属性从中心用户调整为边缘用户, 使中心用户和边缘用户的数量比不超出该配比门限值。 其中, 所述均衡模块对部分终端的用户属性进行调整, 包括: 获取各终 端的服务质量最小保证速率, 按照服务质量最小保证速率的大小对终端进行 排序 (按照由小到大的顺序排序) , 对排在最后的一个或多个终端的用户属 性进行调整。
这样, 本发明实施例还能够对全频带资源和部分频带资源进行有效的负 载均衡, 所谓负载均衡就是使小区内部的负载资源分配合理, 从而使频率资 源利用最大化, 也就是说分配到内环和外环的负载不能过多或者过少, 负载 均衡是需要均衡门限来控制的。
这样, 通过本发明实施例的装置能够提高上行系统容量, 无需动态的复 杂操作, 也减緩了带有功控的时延等待, 同时降低了硬件实现的复杂度。
图 3为本发明实施例的一种部分频率复用的资源分配方法的流程图, 如 图 3所示, 该方法包括下面步骤:
S10、 基站获取终端上报的上行信道参数;
S20、基站根据所述上行信道参数和所述终端当前的用户属性对应的上行 信道参数的门限值, 决策是否调整所述终端的用户属性, 其中, 所述用户属 性包括中心用户和边缘用户;
S30、 为用户属性进行了调整的终端重新分配频谱资源。
这样, 当在某个釆用 OFDM系统的产品, 对于频率有限的上行频带来说 通过本发明的方法可以釆用频率复用技术有效抑制同频干扰。
在步骤 S20中、 所述基站决策是否调整终端的用户属性的步骤还包括: 判断决策后的中心用户和边缘用户的数量比是否超出配比门限值, 如超出, 则将部分终端的用户属性从中心用户调整为边缘用户, 使中心用户和边缘用 户的数量比不超出该配比门限值。
在一优选实施例中, 所述上报的上行信道参数包括调制编码方式, 所述 用户属性对应的上行信道参数的门限值包括用户属性对应的调制编码方式的 阶数门限。
其中, 若所述用户属性对应的调制编码方式的阶数门限包括边缘用户对 应的调制编码方式的阶数门限, 则 如所述终端当前的用户属性为边缘用户, 所述基站决策是否调整所述终 缘用户对应的调制编码方式的阶数门限, 如大于, 则决策将所述终端的用户 属性调整为中心用户。 其中,
所述边缘用户对应的调制编码方式的阶数门限包括第一门限和第二门 限, 其中第一门限大于第二门限;
如所述终端当前的用户属性为边缘用户, 且上报的上行信道参数包括虚 拟多输入多输出类型信息, 则所述基站决策是否调整终端的用户属性时, 将 所述第一门限作为所述边缘用户对应的调制编码方式的阶数门限, 上报的上 行信道参数不包括虚拟多输入多输出类型信息时, 将第二门限作为所述边缘 用户对应的调制编码方式的阶数门限。
其中, 若所述用户属性对应的上行信道参数的门限值包括中心用户对应 的调制编码方式的阶数门限, 则
如所述终端当前的用户属性为中心用户, 所述基站决策是否调整所述终 端的用户属性时, 判断所述终端上报的调制编码方式的阶数是否小于所述中 心用户对应的调制编码方式的阶数门限, 如小于, 则决策将所述终端的用户 属性调整为边缘用户。 其中,
所述中心用户对应的调制编码方式的阶数门限包括第一门限和第二门 限, 其中第一门限小于第二门限;
如所述终端当前的用户属性为中心用户, 且上报的上行信道参数包括虚 拟多输入多输出类型信息, 则所述基站决策是否调整终端的用户属性时, 将 所述第一门限作为所述中心用户对应的调制编码方式的阶数门限, 上 ^艮的上 行信道参数不包括虚拟多输入多输出类型信息时 , 将第二门限作为所述边缘 用户对应的调制编码方式的阶数门限。
这样, 本发明实施例的方法还能够对全频带资源和部分频带资源进行有 效的负载均衡, 从而使频率资源利用最大化。
在任何一个使用 OFDM系统的产品的上行帧中, 此处为了方便说明, 引 用基于 IEEE802.16协议的 WIMAX上行帧作为例子, 如图 4所示, WIMAX 上行帧除了 Ranging (测距) 区域就是发送数据的 Burst (突发) 区域。
本发明实施例中, 内环 (中心区域)表示在中心用户可以使用全部的频 率资源, 外环(边缘区域)表示将系统频率资源分为 3段, 每个基站各使用 部分频带以减少各基站间的干扰, 也就说将 Fm的全频带分为 3份不相交的 频带 (也可以称为隔离带) 。 如图 1所示的频率 Fbl、 Fb2、 Fb3 , 用三种不 同的图样来表示 3段不相交的频带资源, 也就是背景技术提到的复用因子是 3的情况。
在本发明实施例中, 外环(边缘用户)和内环(中心用户)都是给接入 小区的用户的一种属性, 带有这种频率复用技术的基站会在用户刚接入小区 的时候, 给所有终端的属性全部设为 '外环, 。 在接入一段时间后, 会根据 终端上报的参数, 如调制编码方式( MCS ) (例如, BPSK ( Binary Phase Shift Keying, 二相相移键控) , QPSK ( Quadrature Phase Shift Keying, 正交相移 键控), 16QAM( Quadrature Amplitude Modulation,相正交振幅调制), 64QAM 等) , 虚拟 ΜΙΜΟ ( Multiple-Input Multiple Output, 多输入多输出)类型, QoS (服务质量) 以及内外环资源利用情况等参数, 来决策终端在哪个区域 传输数据效率更高, 并存储决策结果, 所谓决策结果也就是说哪些用户要从 '外环, 的属性切换到 '内环, 的属性, 哪些用户还继续保持 '外环, 属性, 哪些用户需要从 '内环, 的属性切换到 '外环, 的属性等, 并将此决策结果 传递到均衡模块。 然后均衡模块根据经验门限值, 排序用户级别等参数去判 断用户的内外环属性, 从而使频率资源有效利用, 提高系统容量。
如图 4所示, 纵向方向表示全频带, X区域表示的是把全频带分为 3段 不相交的频带资源。 很多用户刚接入网络的时候, 基站给予所有用户的属性 都设为 '外环, , 也就是图 3中 X区域 3个频段里。 然后, 当通过本发明实 施例进行决策之后, 将调整 3个频段中的用户属性改变为 '内环, 的用户切 换到内环, 此时具有内环属性的用户可以使用全频段频谱, 即进入 y区域。
步骤 101 : 所有终端初始接入都处于外环, 将该终端的用户属性配置为 '外环(边缘用户), , 如图 1 中所示, 分配给用户属性为边缘用户的终端 的频率可以是 Fbl、 Fb2、 Fb3频段中任意的一个, 接入的时候落入哪一个区 域即有用此区域的外环属性;
步骤 102:在终端接入一段时间之后,基站固定周期获取所有终端的 MCS 和虚拟 MIMO类型, 并决策是否调整终端的用户属性, 更新所有内外环资源 利用情况, 即更新中心用户和边缘用户的数量。
具体决策如下:
若终端当前处于外环,用户属性为边缘用户, 则判断该终端的 MCS的阶 数是否高于外环区域下的门限值(Outter— MCS ) , 若高于, 则决策将终端的 用户属性调整为中心用户。 4叚如目前系统中的 Outter— MCS 取值为 16QAM-CTC ( Convolutional Turbo Code, 卷积 Turbo码) ; 如果该终端启用 了虚拟 MIMO传输方式, 上报的上行信道参数中包括虚拟 MIMO信息, 则 Outter— MCS取值为 64QAM-CTC。
若终端当前处于内环, 用户属性为中心用户, 则判断该终端上 ^々MCS 的阶数是否低于内环区域下的阔值(Inner— MCS ) , 若低于, 则决策将终端的 用户属性调整为边缘用户。 假如目前系统实现中 Inner— MCS 取值为 16QAM-CTC; 如果该终端启用了虚拟 MIMO传输方式, 上报的上行信道参 数中包括虚拟 MIMO信息, 则 Inner— MCS取值为 QPSK-CTC。
综上所述可以看出, 在判断终端的内外环属性的时候, 在内外环均设有 门限值, 根据门限范围是来判断最终终端的内外环属性, 而这些门限值的具 体取值是通过大量的测试, 仿真积累的经验值, 是很有实际应有价值的。
步骤 103: 判断中心用户和边缘用户的数量比是否超出配比门限, 若超 过, 则获取各终端的 Qos最小保证速率, 根据 Qos最小保证速率的大小对终 端进行排序, 对排在最后的一个或多个终端的用户属性进行调整, 直到中心 用户和边缘用户的数量比不超出该配比门限值为止。
通过大量的测试, 所述配比门限的取值优选为 [4: 1 , 8: 1] 范围之间的 值。
本领域普通技术人员可以理解上述方法中的全部或部分步骤可通过程序 来指令相关硬件完成, 所述程序可以存储于计算机可读存储介质中, 如只读 存储器、 磁盘或光盘等。 可选地, 上述实施例的全部或部分步骤也可以使用 一个或多个集成电路来实现。 相应地, 上述实施例中的各模块 /单元可以釆用 硬件的形式实现, 也可以釆用软件功能模块的形式实现。 本发明不限制于任 何特定形式的硬件和软件的结合。
以上仅为本发明的优选实施例, 当然, 本发明还可有其他多种实施例, 在不背离本发明精神及其实质的情况下, 熟悉本领域的技术人员当可根据本 发明作出各种相应的改变和变形, 但这些相应的改变和变形都应属于本发明 所附的权利要求的保护范围。
工业实用性 本发明实施例提供一种部分频率复用的资源分配方法及装置, 对于频率 有限的上行频带来说能够釆用频率复用技术以有效抑制同频干扰, 又能对全 频带资源和部分频带资源进行有效的负载均衡。

Claims

权 利 要 求 书
1、 一种部分频率复用的资源分配方法, 其包括:
基站获取终端上报的上行信道参数;
根据所述上行信道参数和所述终端当前的用户属性对应的上行信道参数 的门限值, 决策是否调整所述终端的用户属性, 其中, 所述用户属性包括中 心用户和边缘用户; 以及
为用户属性进行了调整的终端重新分配频率资源。
2、 如权利要求 1所述的方法, 其中:
所述上行信道参数包括调制编码方式, 所述用户属性对应的上行信道参 数的门限值包括用户属性对应的调制编码方式的阶数门限。
3、 如权利要求 2所述的方法, 其中:
所述用户属性对应的调制编码方式的阶数门限包括边缘用户对应的调制 编码方式的阶数门限;
所述基站决策是否调整所述终端的用户属性的步骤包括: 如所述终端当 前的用户属性为边缘用户, 所述基站判断所述终端上报的调制编码方式的阶 数大于所述边缘用户对应的调制编码方式的阶数门限时, 则决策将所述终端 的用户属性调整为中心用户。
4、 如权利要求 3所述的方法, 其中:
所述边缘用户对应的调制编码方式的阶数门限包括第一门限和第二门 限, 其中第一门限大于第二门限;
如所述终端当前的用户属性为边缘用户, 且上报的上行信道参数包括虚 拟多输入多输出类型信息, 则所述基站决策是否调整终端的用户属性时, 将 所述第一门限作为所述边缘用户对应的调制编码方式的阶数门限;
如所述终端当前的用户属性为边缘用户, 且上报的上行信道参数不包括 虚拟多输入多输出类型信息, 则所述基站决策是否调整终端的用户属性时, 将所述第二门限作为所述边缘用户对应的调制编码方式的阶数门限。
5、 如权利要求 2所述的方法, 其中: 所述用户属性对应的上行信道参数的门限值包括中心用户对应的调制编 码方式的阶数门限;
所述基站决策是否调整所述终端的用户属性的步骤包括: 如所述终端当 前的用户属性为中心用户, 所述基站判断所述终端上 的调制编码方式的阶 数小于所述中心用户对应的调制编码方式的阶数门限时, 则决策将所述终端 的用户属性调整为边缘用户。
6、 如权利要求 5所述的方法, 其中:
所述中心用户对应的调制编码方式的阶数门限包括第一门限和第二门 限, 其中第一门限小于第二门限;
如所述终端当前的用户属性为中心用户, 且上报的上行信道参数包括虚 拟多输入多输出类型信息, 则所述基站决策是否调整终端的用户属性时, 将 所述第一门限作为所述中心用户对应的调制编码方式的阶数门限。
7、 如权利要求 1-6任一项所述的方法, 其中: 所述基站决策是否调整终 端的用户属性的步骤还包括:
判断决策后的中心用户和边缘用户的数量比是否超出配比门限值, 如超 出, 则将部分终端的用户属性从中心用户调整为边缘用户, 使中心用户和边 缘用户的数量比不超出所述配比门限值。
8、 如权利要求 7所述的方法, 其中: 所述对部分终端的用户属性进行调 整, 具体包括:
获取各终端的服务质量最小保证速率, 按照服务质量最小保证速率的从 小到大对终端进行排序 ,对排在最后的一个或多个终端的用户属性进行调整。
9、 如权利要求 1-6任一项所述的方法, 其中: 所述基站获取终端上报的 上行信道参数之前, 所述方法还包括:
在所述终端初始接入小区时将所述终端的用户属性配置为边缘用户。
10、 一种部分频率复用资源分配的装置, 应用于基站中, 其包括: 获取模块, 其设置为: 用于获取终端上报的上行信道参数; 决策模块, 其设置为: 根据所述上行信道参数和所述终端当前的用户属 性对应的上行信道参数的门限值, 决策是否调整所述终端的用户属性, 其中, 所述用户属性包括中心用户和边缘用户; 以及
分配模块, 其设置为: 为用户属性进行了调整的终端重新分配频率资源。
11、 如权利要求 10所述的装置, 其中:
所述上行信道参数包括调制编码方式, 所述用户属性对应的上行信道参 数的门限值包括用户属性对应的调制编码方式的阶数门限。
12、 如权利要求 11所述的装置, 其中: 所述用户属性对应的调制编码方 式的阶数门限包括边缘用户对应的调制编码方式的阶数门限, 所述终端当前 的用户属性为边缘用户,
所述决策模块是设置为以如下方式决策是否调整所述终端的用户属性: 方式的阶数门限时, 则决策将所述终端的用户属性调整为中心用户, 其中, 所述边缘用户对应的调制编码方式的阶数门限包括第一门限和第二门 限, 其中第一门限大于第二门限, 如所述终端当前的用户属性为边缘用户, 且上报的上行信道参数包括虚拟多输入多输出类型信息, 则所述决策模块在 决策是否调整终端的用户属性时, 将所述第一门限作为所述边缘用户对应的 调制编码方式的阶数门限; 如所述终端当前的用户属性为边缘用户, 且上报 的上行信道参数不包括虚拟多输入多输出类型信息, 则所述基站决策是否调 整终端的用户属性时, 将所述第二门限作为所述边缘用户对应的调制编码方 式的阶数门限。
13、 如权利要求 11所述的装置, 其中: 所述用户属性对应的上行信道参 数的门限值包括中心用户对应的调制编码方式的阶数门限, 所述终端当前的 用户属性为中心用户,
所述决策模块是设置为以如下方式决策是否调整所述终端的用户属性: 判断所述终端上>¾的调制编码方式的阶数小于所述中心用户对应的调制编码 方式的阶数门限时, 则决策将所述终端的用户属性调整为边缘用户, 其中, 所述中心用户对应的调制编码方式的阶数门限包括第一门限和第二门 限, 其中第一门限小于第二门限; 如所述终端当前的用户属性为中心用户, 且上报的上行信道参数包括虚拟多输入多输出类型信息, 则所述决策模块在 决策是否调整终端的用户属性时, 将所述第一门限作为所述中心用户对应的 调制编码方式的阶数门限, 如所述终端当前的用户属性为中心用户, 且上报 的上行信道参数不包括虚拟多输入多输出类型信息, 则所述基站决策是否调 整终端的用户属性时, 将所述第二门限作为所述边缘用户对应的调制编码方 式的阶数门限。
14、 如权利要求 9所述的装置, 所述装置还包括:
配置模块, 设置为: 在所述终端初始接入小区时将所述终端的用户属性 配置为边缘用户。
15、 如权利要求 10-14任一项所述的装置, 所述装置还包括:
均衡模块, 其设置为: 判断决策后的中心用户和边缘用户的数量比是否 超出配比门限值, 如超出, 则将部分终端的用户属性从中心用户调整为边缘 用户, 使中心用户和边缘用户的数量比不超出该配比门限值。
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