WO2013063947A1 - 一种小区动态频率规划方法和装置 - Google Patents

一种小区动态频率规划方法和装置 Download PDF

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Publication number
WO2013063947A1
WO2013063947A1 PCT/CN2012/077758 CN2012077758W WO2013063947A1 WO 2013063947 A1 WO2013063947 A1 WO 2013063947A1 CN 2012077758 W CN2012077758 W CN 2012077758W WO 2013063947 A1 WO2013063947 A1 WO 2013063947A1
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Prior art keywords
frequency
cell
dynamic
carrier
maio
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PCT/CN2012/077758
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English (en)
French (fr)
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汪波
彭江萍
郝瑞晶
沈正辉
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中兴通讯股份有限公司
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Publication of WO2013063947A1 publication Critical patent/WO2013063947A1/zh

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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W16/00Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
    • H04W16/02Resource partitioning among network components, e.g. reuse partitioning
    • H04W16/10Dynamic resource partitioning
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02DCLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00Reducing energy consumption in communication networks
    • Y02D30/70Reducing energy consumption in communication networks in wireless communication networks

Definitions

  • the present invention relates to the field of communications technologies, and in particular, to a method and apparatus for implementing cell dynamic frequency planning in a GSM (Global System of Mobile Communications) network, and further relates to a dynamic frequency planning technique for supporting cell frequency hopping.
  • GSM Global System of Mobile Communications
  • Frequency hopping is a communication method in which the carrier frequency of the transmitting and receiving signals is changed according to a predetermined rule. The frequency diversity and interference diversity can be used to improve the network quality, reduce network interference, and ensure less when the network soft congestion does not rise. Frequency reuse, improve spectrum utilization.
  • the main technical problem to be solved by the embodiments of the present invention is to provide a cell dynamic frequency planning method and device, which can reduce the number of allocated frequencies in the case of unbalanced traffic.
  • an embodiment of the present invention provides a cell dynamic frequency planning method, including: dividing an available frequency resource into one or more mutually disjoint dynamic frequency groups, and setting a frequency sharing area to correspond to different dynamic frequency groups, Each frequency sharing area includes at least one cell, and the dynamic frequency group corresponding to each cell is used as a dynamic frequency resource pool of the cell; MAIO is configured for the high priority TCH carrier frequency of each cell, and the status of each MAIO is marked. Adjusted to allocated; according to the MAIO value in each dynamic frequency group, the status flag of each MAIO, the current frame number, and the dynamic frequency resource pool, perform carrier frequency dynamic frequency allocation and/or carrier frequency off dynamic frequency recovery processing. .
  • the performing carrier frequency power-on dynamic frequency processing comprises: when the cell traffic has a carrier frequency to be powered on, calculating a frequency point currently used by the power-on carrier frequency according to the status marked as the allocated MAIO and the current frame number. After the frequency point is removed from the dynamic frequency pool, a frequency point is selected as the initial frequency of use of the carrier frequency to be powered up, and the status flag of the MAIO corresponding to the frequency point is adjusted to be allocated.
  • the performing the carrier frequency off dynamic frequency recovery process comprises: when the cell traffic has a carrier frequency to be turned off, if the MAIO used by the carrier frequency has no other carrier frequency of the cell using the same dynamic frequency group, Then, the frequency point currently used by the carrier frequency is calculated according to the MAIO and the current frame number used by the carrier frequency, the frequency point is recovered, and the state flag of the MAIO used by the carrier frequency is adjusted to be unallocated.
  • the frequency point currently used for calculating the carrier frequency includes: MAIO, current frame number, and hopping sequence number used according to the carrier frequency Calculate the frequency point currently used by the carrier frequency.
  • the frequency hopping process includes: maintaining synchronization of cells in the same dynamic frequency group, and configuring the same hopping sequence number for each cell.
  • the method further includes: calculating, by each cell, the interference situation of each frequency point in the dynamic frequency resource pool corresponding to the cell, and periodically calculating the available frequency set of the cell;
  • the frequency points allocated in the carrier frequency power-on dynamic frequency allocation process are from the available Frequency set.
  • the performing the carrier frequency power-on dynamic frequency allocation processing comprises: calculating a frequency point currently used by the power-on carrier frequency according to the status label as the allocated MAIO and the current frame number, and rejecting the frequency point in the available frequency set. After that, select a frequency point with the least interference as the initial use frequency of the carrier frequency to be powered up.
  • the performing the carrier frequency power-on dynamic frequency allocation processing further includes: when the available frequency group is used to eliminate the used frequency point and there is no residual frequency point, selecting the frequency point with the least interference as the waiting frequency in the available frequency set The initial frequency of use of the carrier frequency.
  • each cell in the frequency sharing area satisfies the following conditions: each cell is a non-adjacent location or a traffic peak of each cell has a time difference.
  • the method further includes: broadcasting a control channel for each cell in the frequency sharing zone.
  • the embodiment of the invention further provides a cell dynamic frequency planning device, which includes:
  • a resource grouping unit configured to: divide the available frequency resource into one or more mutually disjoint dynamic frequency groups, and set the frequency sharing area to correspond to different dynamic frequency groups, each frequency sharing area includes at least one cell, and each cell The corresponding dynamic frequency group is used as a dynamic frequency resource pool of the cell;
  • a configuration unit configured to: configure a mobile MAIO for a high priority voice channel (TCH) carrier frequency of each cell, and adjust a status flag of the MAIO to be allocated;
  • TCH voice channel
  • a resource planning unit configured to: perform carrier frequency dynamic frequency allocation and/or carrier frequency off dynamic according to MAIO values in each dynamic frequency group, status flags of each MAIO, current frame number, and the dynamic frequency resource pool. Frequency recovery processing.
  • each frequency point can be represented by the MAIO corresponding to the current frame, and the state flag of the MAIO is set according to the usage of the frequency point in the cell frequency allocation, the status flag of the MAIO, the MAIO, and the current state.
  • Frame number to achieve dynamic allocation and recovery of frequency Processing, thereby achieving frequency resource sharing between different cells, thereby saving frequency resources and improving system spectrum efficiency.
  • it also supports the frequency hopping mode of the cell, which can further reduce system interference and ensure network quality.
  • FIG. 1 is a schematic diagram of a state of a dynamic frequency resource pool according to an embodiment of the present invention
  • FIG. 2 is a schematic diagram of a carrier frequency state transition according to an embodiment of the present invention.
  • FIG. 3 is a schematic structural diagram of a cell dynamic frequency planning apparatus according to an embodiment of the present invention.
  • FIG. 4 is a top view of a tidal traffic cell according to an embodiment of the present invention.
  • FIG. 5 is a flowchart of a dynamic frequency planning method for supporting frequency hopping in the embodiment of FIG. 4.
  • a shared frequency resource pool is constructed for multiple cells in the same dynamic frequency group, and a suitable frequency point is selected when a new carrier frequency is powered on, thereby maximizing frequency resource utilization.
  • the selected frequency point is determined according to the state flag of MAIO, MAIO, and the current frame number.
  • the frequency resource pool is the sum of all shared frequencies, and each frequency point in the frequency resource pool can be represented by its frequency and MAIO corresponding to the current frame, wherein the frequency of the frequency point is fixed, but its MAIO is A frame is different.
  • Figure 1 shows the frequency resource pool when the frame number is X.
  • the inner ellipse in the figure is the set of available frequencies constructed from the frequency points that satisfy the interference requirements after interference detection, and the outer ellipse is the set of frequency points that do not satisfy the interference requirements after the interference detection.
  • the upper part of the two concentric elliptical regions has a sector area, the MAIO status is marked as the assigned frequency point set, and the remaining part is classified as the unassigned frequency point set.
  • the frequency points in the frequency resource pool can be divided into the following four states:
  • the frequency is ⁇ and MAIO is the frequency of 2. Indicates that the current frame rate is not used and its The interference does not meet the threshold requirement, and this state frequency cannot be assigned.
  • the frequency is f4, MAIO is 1, frequency is f5, MAIO is 3, frequency is f6, and MAIO is 5 frequency points. Indicates that the current frame rate is not used and the interference meets the threshold requirement. This status frequency can be assigned.
  • the frequency is £2 and MAIO is 4. Indicates that the current frame rate point has been used and the interference does not meet the threshold requirement. This status frequency point cannot be assigned.
  • the frequency is fl and the MAIO is 0. Indicates that the current frame rate point has been used and the interference meets the threshold requirement. This state frequency point can be assigned when all MAIOs are assigned.
  • the available and unusable states of the above frequency are actuated by the periodic available frequency set calculation, and the MAIO status flag of the frequency is driven by the carrier frequency off/on action.
  • the interference situation of each frequency point in the frequency resource pool is periodically calculated by each cell, and the available frequency set is obtained according to the calculation result.
  • One way to calculate the interference of each frequency point is to calculate based on the uplink interference. Because the base station periodically measures the uplink interference band of the idle channel, the frequency resource pool intermediate frequency points can be scanned to obtain their interference conditions when measuring the idle channel interference band, and the interference interference of each frequency point uses 8 channel interferences. The average value of the level is characterized. When the interference level of the frequency point exceeds a certain threshold, the frequency point is considered to be unavailable, and the available frequency set of the cell is not put, and the available frequency points are sequentially placed in the order of the interference band level from small to large. The set of available frequencies.
  • the uplink and downlink interference conditions of each frequency point may also be estimated by the mobile terminal measuring the BCCH level of the reported local cell and the neighboring cell.
  • the embodiment of the present invention may also incorporate a frequency hopping technique when implemented.
  • the cell base station frequency hopping mode is used to change the frequency resource used by the carrier frequency in the frequency resource pool over time.
  • the status flag of the MAIO at the frequency is also driven by the carrier frequency hopping action.
  • each cell using the same dynamic frequency group must synchronize and configure the same HSN (HSN, Hopping Sequence Number). If these cells are in the same position, the BTS or BTS machine can be located in the same location. Synchronization is achieved by sharing one clock, otherwise it is necessary to use GPS synchronization or "soft synchronization" technology to achieve the same Step.
  • HSN Hopping Sequence Number
  • the high priority TCH carrier frequency is pre-allocated. These carrier frequencies determine the frequency of each frame according to the allocated MAIO, frame number and HSN. The cell then begins to perform interference measurements on all frequency points in the frequency resource pool. When the frequency interference meets the threshold requirement, the available frequency set is placed.
  • the frequency hopping algorithm in order to implement frequency hopping, it is necessary to combine the current frame number of the cell and the HSN to reverse the MAIO corresponding to the frequency point, and mark it as "allocated" state and allocate it to the power-on carrier frequency, so that the subsequent frame carrier frequency can be followed.
  • the frequency hopping algorithm changes the frequency used by itself, that is, the subsequent frame carrier frequency can change the frequency it uses according to the frame number, HSN and MAIO.
  • the carrier frequency state transition diagram is used.
  • the frequency of the least-distributed MAIO is selected from the available frequency sets.
  • the MAIO is m and the frequency is q. Frequency. If the MAIO is all allocated, the frequency with the least interference is directly selected from the available frequency set.
  • the MAIO corresponding to the current frame of the selected frequency point is then marked as "allocated”.
  • the subsequent frame carrier frequency changes its own frequency according to the frequency hopping algorithm. As shown in the figure, MAIO does not change in the frequency hopping state, and the frequency changes with time.
  • an embodiment of the present invention further provides a cell dynamic frequency planning apparatus, including: a resource grouping unit, configured to: divide an available frequency resource into one or more mutually disjoint dynamic frequency groups, and set a plurality of The frequency sharing areas respectively correspond to different dynamic frequency groups, each frequency sharing area includes at least one cell, and the dynamic frequency group corresponding to each cell is used as the dynamic frequency resource pool of the cell;
  • a resource grouping unit configured to: divide an available frequency resource into one or more mutually disjoint dynamic frequency groups, and set a plurality of The frequency sharing areas respectively correspond to different dynamic frequency groups, each frequency sharing area includes at least one cell, and the dynamic frequency group corresponding to each cell is used as the dynamic frequency resource pool of the cell;
  • a configuration unit configured to: configure a mobile allocation index offset (MAIO) for the high priority voice channel (TCH) carrier frequency of each cell, and adjust the status flag of the MAIO to be allocated;
  • MAIO mobile allocation index offset
  • TCH high priority voice channel
  • a resource planning unit configured to: perform carrier frequency dynamic frequency allocation and/or carrier frequency off dynamic according to MAIO values in each dynamic frequency group, status flags of each MAIO, current frame number, and the dynamic frequency resource pool. Frequency recovery processing.
  • the frequency planning unit is configured to perform carrier frequency power-on dynamic frequency in the following manner Distribution processing:
  • the frequency point currently used by the charging carrier frequency is calculated according to the status marked as the allocated MAIO and the current frame number, and the frequency is selected in the dynamic frequency pool to select a frequency.
  • the point is used as the initial frequency of the carrier frequency to be powered up, and the status flag of the MAIO corresponding to the frequency is adjusted to be allocated.
  • the frequency planning unit is configured to perform carrier frequency off dynamic frequency recovery processing in the following manner: When the cell traffic has a carrier frequency to be turned off, if the carrier frequency uses MAIO, the other dynamic frequency group is not used. The carrier frequency of the cell is used, and the frequency point currently used by the carrier frequency is calculated according to the MAIO and the current frame number used by the carrier frequency, the frequency point is recovered, and the state flag of the MAIO used by the carrier frequency is adjusted to be distribution.
  • the frequency planning unit is configured to calculate a frequency point currently used by the carrier frequency in the following manner when the cell with the same dynamic frequency group performs frequency hopping processing on the uplink carrier frequency: used according to the carrier frequency
  • the MAIO, the current frame number, and the hopping sequence number calculate the frequency point currently used by the carrier frequency.
  • the frequency hopping process comprises: maintaining synchronization of cells in the same dynamic frequency group, and configuring the same hopping sequence number for each cell.
  • the resource planning unit is further configured to: measure the interference situation of each frequency point in the dynamic frequency resource pool corresponding to each cell in real time, and periodically calculate the available frequency set of each cell;
  • the frequency points allocated in the carrier frequency power-on dynamic frequency allocation process are from the available frequency set.
  • the resource planning unit is configured to perform carrier frequency power-on dynamic frequency allocation processing in a manner of: calculating a frequency point currently used by the power-on carrier frequency according to the status marked as the allocated MAIO and the current frame number, After the above-mentioned frequency points are removed from the available frequency, a frequency point with the least interference is selected as the initial use frequency of the carrier frequency to be powered up.
  • the resource planning unit is further configured to perform carrier frequency power-on dynamic frequency allocation processing in a manner as follows: when the available frequency group eliminates the used frequency point and has no residual frequency point, select the minimum interference in the available frequency set.
  • the frequency point is used as the initial frequency of use of the carrier frequency to be powered up.
  • each cell in the frequency sharing area satisfies the following conditions:
  • Each cell is a non-adjacent location or a traffic peak of each cell has a time difference.
  • the resource grouping unit is further configured to: in the dynamic frequency corresponding to each cell Before the group acts as the dynamic frequency resource pool of the cell, broadcasts a control channel (BCCH) carrier frequency static configuration frequency point for each cell in the frequency sharing area, and removes the statically configured frequency point in the corresponding dynamic frequency group. And then as the corresponding dynamic frequency group after the frequency sharing area is updated.
  • BCCH control channel
  • Figure 4 is an example of a topology structure diagram of a frequency shared area, including six cells, each of which has
  • the TCH carrier frequency of the six cells always requires 30 frequency points. Actually, because of the tidal traffic, according to the dynamic frequency planning method of the embodiment of the present invention, since only four TCH carrier frequencies need to be turned on per cell, 24 frequency points can be used to meet the demand.
  • FIG. 5 is a flowchart of a specific implementation of the embodiment of FIG. 4 according to the present invention.
  • the method includes the following steps: Step 1: Initialize the static configuration network BCCH, that is, first statically configure the frequency of the BCCH carrier frequency of each cell in the frequency sharing area. .
  • Step 2 All non-BCCH frequency resources of the system are divided into a number of mutually disjoint dynamic frequency groups, and a frequency resource pool is constructed for each cell in the frequency sharing area.
  • the following describes the construction process of the frequency resource pool by taking the six cells of the topology shown in FIG. 3 as an example. First, according to the geographical location of the cell, three pairs of frequency shared cells can be obtained: (1, 5), (2, 6), (3, 4), each pair of cells is not adjacent to reduce interference in the network.
  • the main considerations in the cell configuration in the frequency sharing zone include: allocating cells with significant time differences in traffic peaks to the same frequency sharing zone. After determining the shared frequency cell group, you can construct a frequency resource pool for each shared frequency group as follows:
  • frequency points 1, 2 are assigned to the shared frequency group 1
  • frequency points 3, 4 are assigned to the shared frequency group 2
  • frequency points 5, 6 are assigned to the shared frequency group 3;
  • frequency points 7, 8 are assigned to the shared frequency group 1
  • frequency points 9, 10 are assigned to the shared frequency group 2
  • frequency points 11, 12 are assigned to the shared frequency group 3;
  • frequency points 19, 20 are assigned to the shared frequency group 1
  • frequency points 21, 22 are assigned to the shared frequency group 2
  • frequency points 23, 24 are assigned to the shared frequency group 3.
  • the frequency resource pool of the shared frequency group 1 cell is ⁇ 1, 2, 7, 8, 13, 14, 19, 20 ⁇
  • the frequency resource pool of the shared frequency group 2 cell is ⁇ 3, 4, 9, 10, 15 , 16, 21, 22 ⁇
  • the frequency resource pool of the shared frequency group 3 cells is ⁇ 5, 6, 11, 12, 17, 18, 23, 24 ⁇ .
  • Step 4 Each cell measures the interference of each frequency point in the frequency resource pool in real time, and periodically calculates its available frequency set.
  • the cell first calculates the interference condition of each frequency point according to the measured result, and then compares the interference calculation result with the threshold requirement shown in Table 1.
  • the frequency point interference satisfies the requirement, the cell puts Enter the set of available frequencies. It can be calculated by using the idle channel uplink interference band level measured by the base station, or by using the BCCH reception level of the local cell and the neighboring cell reported by the mobile phone.
  • Step 5 When the cell starts the carrier frequency because of the service demand, find the frequency of the least interference in the unassigned MAIO from the available frequency set, and update the MAIO status corresponding to the frequency point to "allocated” if all MAIOs are " If the status is assigned, the frequency with the least interference is selected.
  • Step 6 When the cell turns off the carrier frequency due to the change of traffic, if the MAIO of the carrier frequency does not have the available frequency threshold requirement
  • the method according to the embodiment of the present invention constructs a frequency resource pool, and the carrier frequency in the system dynamically selects a suitable frequency point from the frequency resource pool.
  • the number of frequency points (24) occupied by each TCH carrier frequency in the frequency sharing area is less than the number of occupied frequency points (30) when the method is not used. Therefore, the invention can save frequency resources and improve system spectrum efficiency. It is also possible to determine the frequency of use of the upper/lower carrier frequency based on the interference measurement of the frequency points in the frequency resource pool, and use the base station frequency hopping mode to change the frequency resource used by the carrier frequency in the frequency resource pool with time. System interference can be further reduced to ensure network quality.
  • each module/unit in the foregoing embodiment may be implemented in the form of hardware, or may use software functions.
  • the form of the module is implemented. The invention is not limited to any specific form of combination of hardware and software.
  • each frequency point can be represented by the MAIO corresponding to the current frame.
  • the state flag of the MAIO is set according to the usage of the frequency point, and the status flag of the MAIO, the MAIO, and the current frame number are used.
  • the dynamic allocation and recovery processing of the frequency is realized, thereby realizing the sharing of frequency resources between different cells, thereby saving frequency resources and improving system spectrum efficiency.
  • it supports the frequency hopping mode of the cell, which can further reduce system interference and ensure network quality.

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Abstract

一种小区动态频率规划方法和装置,通过对相同动态频率组的多个小区构造共享频率资源池,在有新的载频上电或有频载关闭时动态进行频点调整,实现频点资源利用最大化,节省频点资源,提高系统频谱效率,还可以结合对频率资源池内诸频点的干扰测量决定上/下电载频的使用频率,以及使用基站跳频模式来随时间改变载频使用在所述频率资源池中的频点资源,还可以进一步减少系统干扰,保证网络质量。

Description

一种小区动态频率规划方法和装置
技术领域
本发明属于通信技术领域, 具体涉及一种在 GSM ( Global System of Mobile communications,全球移动通信系统 )网络中实现小区动态频率规划的 方法和装置, 进一步涉及支持小区跳频的动态频率规划技术。 背景技术
传统 GSM 系统为了在有限的频率资源条件下最大提升网络容量而又不 恶化用户通信质量, 需要合理的对整网的频率复用进行规划。 一般的处理原 则是: 每一个小区仅使用系统频带中特定的一组频率, 相邻小区不能使用该 小区频率组中的频率甚至邻频, 这些频率仅能在距离该小区足够远的小区中 使用。 此外, 为了进一步降低频率间的干扰, 跳频技术也开始被广泛应用。 跳频是一种收发双方传输信号的载波频率按照预定规律进行变化的通信方 式, 可以通过频率分集和干扰分集改善网络质量, 减少网络干扰, 并且在网 络软拥塞不上升的情况下, 保证更小的频率复用度, 提高频谱利用率。
另外,随着城市化步伐的加快,城市中的大型社区、 CBD( Central Business District 中央商务区)商圈越来越多, 无线网络话务量出现了一段时间从某地 迁移到另一地区的现象(例如: 工作时间人们在 CBD商圈大量聚集, 下班后 又向居民区大量迁移) , 即所谓的 "潮汐话务" 。 这种环境下当话务量突发 增加时, 最容易出现网络拥塞, 无法接入的现象; 而话务量突然减少又会使 资源闲置, 浪费网络资源。 这给网络频率规划带来难度, 因为传统规划方式 为静态分配各小区的载频和频点, 如果按照最高话务量进行组网, 虽然能保 证通话质量, 但却与目前绿色环保的建网原则背道而驰; 如果按照平均话务 组网, 当遇到话务量激增时, 网络又不堪重负。 在各种通信系统中频谱资源 都非常宝贵, 随着 3G和 4G无线通信技术的快速发展, 不断提高 GSM网络 频谱效率,以节省出频率带宽用于 3G和 4G网络的建设是各大运营商的迫切 需要。 因此, 需要建立一种新的小区频率规划方法, 改变传统的静态分配方 式中由于话务不均衡导致无法科学的分配频点的难题。 发明内容
本发明实施例要解决的主要技术问题是, 提供一种小区动态频率规划方 法和装置, 实现在话务不均衡的情况下减少频点的分配数量。
为解决上述技术问题, 本发明实施例提供一种小区动态频率规划方法, 包括: 将可用频率资源分成一个或多个互不相交的动态频率组, 设置频率共 享区分别对应不同的动态频率组, 每个频率共享区包括至少一个小区, 将各 小区对应的动态频率组作为该小区的动态频率资源池; 为所述各小区的高优 先级 TCH载频配置 MAIO, 并将上述各 MAIO的状态标记调整为已分配; 根 据各动态频率组中的 MAIO值、 各 MAIO的状态标记、 当前帧号以及所述动 态频率资源池, 进行载频上电动态频率分配和 /或载频关闭动态频率回收处 理。
可选的, 所述进行载频上电动态频率处理包括: 当小区话务有载频需要 上电时, 根据状态标记为已分配的 MAIO和当前帧号计算上电载频当前使用 的频点, 在所述动态频率池中剔除上述频点后选择一个频点做为待上电载频 的初始使用频点 , 并将该频点对应的 MAIO的状态标记调整为已分配。
可选的, 所述进行载频关闭动态频率回收处理包括: 当小区话务有载频 需要关闭时, 如果该载频使用的 MAIO没有其他釆用相同动态频率组的小区 的载频在使用, 则根据该载频使用的 MAIO和当前帧号计算该载频当前使用 的频点,将该频点回收,并将该载频使用的 MAIO的状态标记调整为未分配。
其中, 当釆用相同动态频率组的小区对上电载频进行跳频处理时, 所述 计算载频当前使用的频点包括: 根据该载频使用的 MAIO、 当前帧号以及跳 频序列号计算载频当前使用的频点。
可选的, 所述的跳频处理包括: 保持釆用相同动态频率组的各小区同步, 且为各小区配置相同的跳频序列号。
可选的, 该方法还包括: 各小区实时测量小区对应的动态频率资源池中 各频点的干扰情况, 周期性的计算小区的可用频率集;
其中, 所述进行载频上电动态频率分配处理中分配的频点来自所述可用 频率集。
可选的, 所述进行载频上电动态频率分配处理包括: 根据状态标记为已 分配的 MAIO和当前帧号计算上电载频当前使用的频点, 在所述可用频率集 中剔除上述频点后, 在其中选择一个干扰最小的频点做为待上电载频的初始 使用频点。
可选的, 所述进行载频上电动态频率分配处理还包括: 当所述可用频率 集中剔除已用频点后无剩余频点时, 在可用频率集中选择干扰最小的频点做 为待上电载频的初始使用频点。
可选的, 所述频率共享区中的各小区满足以下条件: 各小区为非相邻位 置或各小区的话务高峰存在时间差。
可选的, 在所述将各小区对应的动态频率组做为该小区的动态频率资源 池之前, 所述方法还包括: 为所述频率共享区中的每个小区广播控制信道
( BCCH )载频静态配置频点, 在对应的动态频率组中剔除已静态配置的频 点后作为所述频率共享区更新后的对应动态频率组。 本发明实施例还提供一 种小区动态频率规划装置, 其包括:
资源分组单元, 其设置为: 将可用频率资源分成一个或多个互不相交的 动态频率组, 设置频率共享区分别对应不同的动态频率组, 每个频率共享区 包括至少一个小区, 将各小区对应的动态频率组作为该小区的动态频率资源 池;
配置单元, 其设置为: 为所述各小区的高优先级话音信道(TCH )载频 配置移 MAIO, 并将所述 MAIO的状态标记调整为已分配; 以及
资源规划单元, 其设置为: 根据各动态频率组中的 MAIO值、 各 MAIO 的状态标记、 当前帧号以及所述动态频率资源池, 进行载频上电动态频率分 配和 /或载频关闭动态频率回收处理。
根据本发明实施例的方案, 由于每个频点都可以通过当前帧对应的 MAIO来表示, 在小区频率分配时根据频点的使用情况设置 MAIO的状态标 记, 通过 MAIO、 MAIO 的状态标记和当前帧号实现频率的动态分配和回收 处理, 从而实现了不同小区之间的频率资源共享, 从而节省频点资源, 提高 系统频谱效率。 此外还支持小区的跳频方式, 可以进一步减少系统干扰, 保 证网络质量。 附图概述
图 1为本发明实施例的动态频率资源池状态示意图;
图 2 为本发明实施例的载频状态迁移原理图;
图 3为本发明实施例的小区动态频率规划装置的结构示意图
图 4 为本发明实施例的潮汐话务小区拓朴图;
图 5 为图 4中的实施例的支持跳频的动态频率规划方法流程图。
本发明的较佳实施方式
下面结合附图对本发明实施例作详细说明, 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。
本发明实施例中, 对釆用相同动态频率组的多个小区构造共享频率资源 池, 在有新的载频上电时从中挑选合适的频点使用, 实现频点资源利用最大 化。 并根据 MAIO、 MAIO的状态标记和当前帧号来确定选择的频点。
本发明实施例在实现时可以结合频点干扰检测技术。 本发明实施例中, 频率资源池是所有共享频率的总和, 频率资源池中的每一个频点都可用其频 率和当前帧对应的 MAIO表示, 其中频点的频率固定不变, 但是其 MAIO每 一帧都不同。 如图 1所示为帧号为 X时的频率资源池。 图示中内椭圓部分为 由经过干扰检测后满足干扰要求的频点构建的可用频率集, 外椭圓部分为经 过干扰检测后不满足干扰要求的频点的集合。 两个同心椭圓示意区中的上部 有一个扇形区域, 该区域为 MAIO的状态标记为已分配的频点集合, 剩余部 分为 MAIO的状态标记为未分配的频点集合。 该频率资源池中各频点可分为 如下 4种状态:
1.未分配 MAIO, 不可用状态
如图示中频率为 β , MAIO为 2的频点。 表示当前帧频点未被使用且其 干扰不满足门限要求, 此状态频点不能被分配。
2.未分配 MAIO, 可用状态
如图示中频率为 f4, MAIO为 1、 频率为 f5 , MAIO为 3、 频率为 f6, MAIO为 5的三个频点。 表示当前帧频点未被使用且干扰满足门限要求, 此 状态频点可以被分配。
3.已分配 MAIO, 不可用状态
如图示中频率为 £2, MAIO为 4的频点。 表示当前帧频点已被使用且干 扰不满足门限要求, 此状态频点不能被分配。
4.已分配 MAIO, 可用状态
如图示中频率为 fl , MAIO为 0的频点。 表示当前帧频点已被使用且干 扰满足门限要求, 当所有 MAIO都被分配时, 此状态频点才能被分配。
上述频点的可用和不可用状态由周期性的可用频率集计算进行动作驱 动, 频点的 MAIO的状态标记由载频关闭 /上电动作驱动。
本发明实施例的频点干扰检测处理时通过各小区周期性计算频率资源池 中各频点的干扰情况, 并根据计算结果得出可用频率集。 计算各个频点干扰 情况的一个方法是根据上行干扰带来计算。 因为基站会周期性地对空闲信道 的上行干扰带进行测量, 因此可以在测量空闲信道干扰带时对频率资源池中 频点进行扫描获取它们的干扰情况, 各频点干扰情况釆用 8个信道干扰带等 级的平均值表征, 当频点的干扰带级别超过特定门限时就认为此频点不可用, 而不放入小区可用频率集, 可用频点按干扰带等级从小到大的顺序依次放入 可用频率集。 也可以由移动终端测量上报的本小区和邻接小区的 BCCH电平 估算各频点的上下行干扰情况。
本发明实施例在实现时还可以结合跳频技术。 例如使用小区基站跳频模 式来随时间改变载频使用在所述频率资源池中的频点资源。 频点的 MAIO的 状态标记还由载频跳频动作驱动。 为了实现跳频功能, 每个使用相同动态频 率组的小区必须同步并配置相同的 HSN (HSN, Hopping Sequence Number, 跳 频序列号), 如果这些小区共 BTS或者 BTS机拒位于同一位置, 则可以通过 共有一个时钟实现同步, 否则需要釆用 GPS同步或者 "软同步" 技术实现同 步。
如果同时结合了干扰检测和跳频技术, 当 BTS处于初始状态, 高优先级 TCH载频进行预分配,这些载频根据分配的 MAIO、 帧号及 HSN确定每帧使 用的频率。 接着小区开始对频率资源池中所有频点进行干扰测量, 当频点干 扰满足门限要求时, 则放入可用频率集。 根据跳频算法, 为了实现跳频还需 结合小区当前帧号及 HSN反推出此频点对应的 MAIO, 标记为 "已分配" 状 态并分配给上电载频, 这样后续帧载频就可依照跳频算法改变自己使用的频 率, 即后续帧载频可以根据帧号、 HSN及 MAIO改变它使用的频率。
如图 2所示的载频状态迁移示意图, 当小区有载频上电时, 从可用频率 集中挑选未分配 MAIO中干扰最小的频点使用, 图示中选择了 MAIO为 m, 频率为 q的频点。 如果 MAIO全部分配完毕则直接从可用频率集中挑选干扰 最小的频点。 之后将选定的频点当前帧对应的 MAIO标记为 "已分配" 。 当 资源分配成功后, 后续帧载频依照跳频算法改变自己使用的频率。 如图示中 在跳频状态下 MAIO不变, 频率随时间发生变化。
当小区有载频下电时, 如果其 MAIO没有其他釆用相同动态频率组的小
如图 3所示, 本发明实施例还提供一种小区动态频率规划装置, 其包括: 资源分组单元, 其设置为: 将可用频率资源分成一个或多个互不相交的 动态频率组, 设置多个频率共享区分别对应不同的动态频率组, 每个频率共 享区包括至少一个小区, 将各小区对应的动态频率组作为该小区的动态频率 资源池;
配置单元, 其设置为: 为所述各小区的高优先级话音信道(TCH )载频 配置移动分配索引偏置 (MAIO ) , 并将所述 MAIO 的状态标记调整为已分 配; 以及
资源规划单元, 其设置为: 根据各动态频率组中的 MAIO值、 各 MAIO 的状态标记、 当前帧号以及所述动态频率资源池, 进行载频上电动态频率分 配和 /或载频关闭动态频率回收处理。 较佳的, 所述频率规划单元是设置为以如下方式进行载频上电动态频率 分配处理:
当小区话务有载频需要上电时, 根据状态标记为已分配的 MAIO和当前 帧号计算上电载频当前使用的频点, 在所述动态频率池中剔除上述频点后选 择一个频点做为待上电载频的初始使用频点, 并将该频点对应的 MAIO的状 态标记调整为已分配。
较佳的, 所述频率规划单元是设置为以如下方式进行载频关闭动态频率 回收处理: 当小区话务有载频需要关闭时, 如果该载频使用的 MAIO没有其 他釆用相同动态频率组的小区的载频在使用, 则根据该载频使用的 MAIO和 当前帧号计算该载频当前使用的频点, 将该频点回收, 并将该载频使用的 MAIO的状态标记调整为未分配。
较佳的, 所述频率规划单元是设置为当釆用相同动态频率组的小区对上 电载频进行跳频处理时, 以如下方式计算载频当前使用的频点: 根据该载频 使用的 MAIO、 当前帧号以及跳频序列号计算载频当前使用的频点。
较佳的, 所述的跳频处理包括: 保持釆用相同动态频率组的各小区同步, 且为各小区配置相同的跳频序列号。
较佳的, 所述资源规划单元还设置为: 实时测量各小区对应的动态频率 资源池中各频点的干扰情况, 周期性的计算各小区的可用频率集;
其中, 载频上电动态频率分配处理中分配的频点来自所述可用频率集。 较佳的, 所述资源规划单元是设置为以如方式进行载频上电动态频率分 配处理: 根据状态标记为已分配的 MAIO和当前帧号计算上电载频当前使用 的频点, 在所述可用频率集中剔除上述频点后, 在其中选择一个干扰最小的 频点做为待上电载频的初始使用频点。
较佳的, 所述资源规划单元还设置为以如方式进行载频上电动态频率分 配处理: 当所述可用频率集中剔除已用频点后无剩余频点时, 在可用频率集 中选择干扰最小的频点做为待上电载频的初始使用频点。
较佳的, 所述频率共享区中的各小区满足以下条件: 各小区为非相邻位 置或各小区的话务高峰存在时间差。
较佳的, 所述资源分组单元还设置为: 在所述将各小区对应的动态频率 组做为该小区的动态频率资源池之前, 为所述频率共享区中的每个小区广播 控制信道(BCCH )载频静态配置频点, 在对应的动态频率组中剔除已静态 配置的频点后作为所述频率共享区更新后的对应动态频率组。
图 4是一个频率共享区的拓朴结构图示例, 包含 6个小区, 每个小区有
5个 TCH载频。 如果使用全静态的频率规划方法, 6个小区的 TCH载频总需 要使用 30个频点。 而实际因为潮汐话务, 按照本发明实施例的动态频率规划 方法, 由于平均每小区只需开启 4个 TCH载频, 使用 24个频点即可满足需 求。
图 5所示为本发明图 4实施例的具体实施流程图, 包括的方法如下: 步骤 1 : 初始化静态配置网络 BCCH, 即先对频率共享区中的每个小区 的 BCCH载频静态配置频点。
步骤 2: 将系统所有的非 BCCH频率资源划为若干互不相交的动态频率 组, 为频率共享区中的每个小区构建频率资源池。 下面以图 3所示拓朴结构 的六小区为例解释频率资源池的构造过程, 首先根据小区的地理位置, 可以 得到三组频率共享小区对: (1,5)、 (2,6)、 (3,4), 每一对小区位置不相邻, 以 减少网络中的干扰。 在频率共享区中的小区配置上主要考虑的原则还包括: 将话务高峰存在明显时间差的小区分配到同一个频率共享区中。 确定共享频 率小区组后, 就可以按照如下步骤为每个共享频率组构造频率资源池:
a)初始化参数 i=0, j=0, p=0, n=共享频率组数, m=共享频率小区总数, Ck= 共享频率组 k中的小区数;
b)令 j=l, i=l, p=l, 将第 i个频率分配到共享频率组 j;
c) i=i+l, 若 系统总频率数, 则算法结束;
d)判断如下条件: 1)如 i-(p-l)*m小于或等于 ;= , 将第 i个频率分配到共享频率组 j , 跳到步骤 c;
2)如 i-(p-l)*m大于 =i Gii, 则跳到步骤 e; e) j=j+l , 判断如下条件:
1)若 j小于或等于 n, 将第 i个频率分配到共享频率组 j , 跳到步骤 c;
2)若 j大于 n,跳到步骤 f;
f) p=p+l J=l,将第 i个频率分配到共享频率组 j,跳到步骤 c。
直观上分配频点的过程可用如下方法表示:
第一轮频点分配过程: 频点 1、 2分配给共享频率组 1 , 频点 3、 4分配 给共享频率组 2, 频点 5、 6分配给共享频率组 3;
第二轮频点分配过程: 频点 7、 8分配给共享频率组 1 , 频点 9、 10分配 给共享频率组 2, 频点 11、 12分配给共享频率组 3;
第四轮频点分配过程: 频点 19、 20分配给共享频率组 1 , 频点 21、 22 分配给共享频率组 2, 频点 23、 24分配给共享频率组 3。
最终得到共享频率组 1 小区的频率资源池为 {1,2,7,8,13,14,19,20} , 共享 频率组 2小区的频率资源池为 {3,4,9,10,15,16,21,22} , 共享频率组 3小区的频 率资源池为 {5,6,11,12,17,18,23,24}。
步骤 3: 为高优先级 TCH载频配置 MAIO, 如果每小区有 2个高优先级 TCH载频。 则小区 1中两个载频可配置 MAIO为 {0,2} , 小区 5为 {1,3} , 类 似地小区 2和小区 3中两载频 MAIO为 {0,2},小区 4和小区 6为 {1,3}。 这样 再结合配置的小区频点信息列表,就可以根据 GSM跳频算法确定载频每一帧 釆用的频率。 例如当选择循环跳频 (HSN=0)时, 如果 FN=1100, 则小区 1 中 MAIO = 0的载频 MAI为(1100 + 0) modulo 8=4, 所以选择频点 13。
步骤 4: 各小区实时测量频率资源池中各频点的干扰情况, 并周期性地 计算其可用频率集。 当一个可用频率集计算周期到达时, 小区首先根据测量 的结果计算各频点的干扰情况, 然后将干扰计算结果与表 1所示的门限要求 进行比较, 当频点干扰满足要求时, 则放入可用频率集。 可以利用基站测量 的空闲信道上行干扰带等级进行计算, 或者利用手机上报的本小区和邻小区 BCCH接收电平进行估算。 步骤 5: 当小区因为业务需求而开启载频时, 从可用频率集中查找未分 配 MAIO中干扰最小的频点, 并更新此频点对应的 MAIO状态为 "已分配" , 如果所有 MAIO都为 "已分配" 状态, 则挑选干扰最小的频点使用。
步骤 6: 当小区因为话务量的变化关闭载频时, 如果该载频的 MAIO没 表 1 可用频率门限要求
Figure imgf000012_0001
综上所述, 本发明实施例所述的方法通过构造一个频率资源池, 系统中 的载频动态的从该频率资源池中挑选合适的频点使用。使用本发明的方法后, 频率共享区各 TCH载频占用的频点数(24个) 少于不使用本方法时的占用 频点个数(30个) 。 因此, 釆用本发明可以节省频点资源, 提高系统频谱效 率。 还可以基于对频率资源池内诸频点的干扰测量决定上 /下电载频的使用频 率, 以及使用基站跳频模式来随时间改变载频使用在所述频率资源池中的频 点资源, 还可以进一步减少系统干扰, 保证网络质量。
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。
需要说明的是, 本发明还可有其他多种实施例, 在不背离本发明精神及 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
本发明实施例中 ,由于每个频点都可以通过当前帧对应的 MAIO来表示 , 在小区频率分配时根据频点的使用情况设置 MAIO的状态标记,通过 MAIO、 MAIO 的状态标记和当前帧号实现频率的动态分配和回收处理, 从而实现了 不同小区之间的频率资源共享, 从而节省频点资源, 提高系统频谱效率。 此 外还支持小区的跳频方式, 可以进一步减少系统干扰, 保证网络质量。

Claims

权 利 要 求 书
1、 一种小区动态频率规划方法, 其包括:
将可用频率资源分成一个或多个互不相交的动态频率组, 设置频率共享 区分别对应不同的动态频率组, 每个频率共享区包括至少一个小区, 将各小 区对应的动态频率组作为该小区的动态频率资源池;
为所述各小区的高优先级话音信道(TCH )载频配置移动分配索引偏置 ( MAIO ) , 并将所述 MAIO的状态标记调整为已分配;
根据各动态频率组中的 MAIO值、 各 MAIO的状态标记、 当前帧号以及 所述动态频率资源池, 进行载频上电动态频率分配和 /或载频关闭动态频率回 收处理。
2、 根据权利要求 1所述的小区动态频率规划方法, 其中, 所述进行载频 上电动态频率分配处理包括: 当小区话务有载频需要上电时, 根据状态标记 为已分配的 MAIO和当前帧号计算上电载频当前使用的频点, 在所述动态频 率池中剔除上述频点后选择一个频点做为待上电载频的初始使用频点, 并将 该频点对应的 MAIO的状态标记调整为已分配。
3、 根据权利要求 1所述的小区动态频率规划方法, 其中, 所述进行载频 关闭动态频率回收处理包括: 当小区话务有载频需要关闭时, 如果该载频使 用的 MAIO没有其他釆用相同动态频率组的小区的载频在使用, 则根据该载 频使用的 MAIO和当前帧号计算该载频当前使用的频点, 将该频点回收, 并 将该载频使用的 MAIO的状态标记调整为未分配。
4、 根据权利要求 2或 3所述的小区动态频率规划方法, 其中, 当釆用相 同动态频率组的小区对上电载频进行跳频处理时, 所述计算载频当前使用的 频点包括: 根据该载频使用的 MAIO、 当前帧号以及跳频序列号计算载频当 前使用的频点。
5、 根据权利要求 4所述的小区动态频率规划方法, 其中, 所述的跳频处 理包括: 保持釆用相同动态频率组的各小区同步, 且为各小区配置相同的跳 频序列号。
6、 根据权利要求 1-3任一项所述的小区动态频率规划方法, 其还包括: 各小区实时测量小区对应的动态频率资源池中各频点的干扰情况, 周期性的 计算小区的可用频率集;
其中, 所述进行载频上电动态频率分配处理中分配的频点来自所述可用 频率集。
7、 根据权利要求 6所述的小区动态频率规划方法, 其中, 所述进行载频 上电动态频率分配处理包括: 根据状态标记为已分配的 MAIO和当前帧号计 算上电载频当前使用的频点, 在所述可用频率集中剔除上述频点后, 在其中 选择一个干扰最小的频点做为待上电载频的初始使用频点。
8、 根据权利要求 7所述的小区动态频率规划方法, 其中, 所述进行载频 上电动态频率分配处理还包括: 当所述可用频率集中剔除已用频点后无剩余 频点时, 在可用频率集中选择干扰最小的频点做为待上电载频的初始使用频 点。
9、 根据权利要求 1-3任一项所述的小区动态频率规划方法, 其中, 所述 频率共享区中的各小区满足以下条件: 各小区为非相邻位置或各小区的话务 高峰存在时间差。
10、 根据权利要求 1-3任一项所述的小区动态频率规划方法, 其中, 在 所述将各小区对应的动态频率组做为该小区的动态频率资源池之前, 所述方 法还包括: 为所述频率共享区中的每个小区广播控制信道(BCCH )载频静 态配置频点, 在对应的动态频率组中剔除已静态配置的频点后作为所述频率 共享区更新后的对应动态频率组。
11、 一种小区动态频率规划装置, 其包括:
资源分组单元, 其设置为: 将可用频率资源分成多个互不相交的动态频 率组, 设置所述频率共享区分别对应不同的动态频率组, 每个频率共享区包 括至少一个小区,将各小区对应的动态频率组作为该小区的动态频率资源池; 配置单元, 其设置为: 为所述各小区的高优先级话音信道(TCH )载频 配置移动分配索引偏置 (MAIO ) , 并将所述 MAIO 的状态标记调整为已分 配; 以及
资源规划单元, 其设置为: 根据各动态频率组中的 MAIO值、 各 MAIO 的状态标记、 当前帧号以及所述动态频率资源池, 进行载频上电动态频率分 配和 /或载频关闭动态频率回收处理。
12、 根据权利要求 11所述的装置, 其中, 所述频率规划单元是设置为以 如下方式进行载频上电动态频率分配处理:
当小区话务有载频需要上电时, 根据状态标记为已分配的 MAIO和当前 帧号计算上电载频当前使用的频点, 在所述动态频率池中剔除上述频点后选 择一个频点做为待上电载频的初始使用频点, 并将该频点对应的 MAIO的状 态标记调整为已分配。
13、 根据权利要求 11所述的装置, 其中, 所述频率规划单元是设置为以 如下方式进行载频关闭动态频率回收处理: 当小区话务有载频需要关闭时, 如果该载频使用的 MAIO 没有其他釆用相同动态频率组的小区的载频在使 用, 则根据该载频使用的 MAIO和当前帧号计算该载频当前使用的频点, 将 该频点回收, 并将该载频使用的 MAIO的状态标记调整为未分配。
14、 根据权利要求 12或 13所述的装置, 其中, 所述频率规划单元是设 置为当釆用相同动态频率组的小区对上电载频进行跳频处理时, 以如下方式 计算载频当前使用的频点: 根据该载频使用的 MAIO、 当前帧号以及跳频序 列号计算载频当前使用的频点。
15、 根据权利要求 14所述的小区动态频率规划方法, 其中, 所述的跳频 处理包括: 保持釆用相同动态频率组的各小区同步, 且为各小区配置相同的 跳频序列号。
16、 根据权利要求 11-13任一项所述的装置, 其中, 所述资源规划单元 还设置为: 实时测量各小区对应的动态频率资源池中各频点的干扰情况, 周 期性的计算各小区的可用频率集;
其中, 载频上电动态频率分配处理中分配的频点来自所述可用频率集。
17、 根据权利要求 16所述的装置, 其中, 所述资源规划单元是设置为以 如方式进行载频上电动态频率分配处理: 根据状态标记为已分配的 MAIO和 当前帧号计算上电载频当前使用的频点, 在所述可用频率集中剔除上述频点 后, 在其中选择一个干扰最小的频点做为待上电载频的初始使用频点。
18、 根据权利要求 17所述的装置, 其中, 所述资源规划单元还设置为以 如方式进行载频上电动态频率分配处理: 当所述可用频率集中剔除已用频点 后无剩余频点时, 在可用频率集中选择干扰最小的频点做为待上电载频的初 始使用频点。
19、 根据权利要求 11-13任一项所述的装置, 其中, 所述频率共享区中 的各小区满足以下条件: 各小区为非相邻位置或各小区的话务高峰存在时间 差。
20、 根据权利要求 11-13任一项所述的装置, 其中, 所述资源分组单元 还设置为: 在所述将各小区对应的动态频率组做为该小区的动态频率资源池 之前, 为所述频率共享区中的每个小区广播控制信道(BCCH )载频静态配 置频点, 在对应的动态频率组中剔除已静态配置的频点后作为所述频率共享 区更新后的对应动态频率组。
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