WO2006069470A1 - A METHOD OF DYNAMICALLY ASSIGNING TRANSMISSION TIME SLOT IN Abis INTERFACE OF MOBILE COMMUNICATION SYSTEM - Google Patents

A METHOD OF DYNAMICALLY ASSIGNING TRANSMISSION TIME SLOT IN Abis INTERFACE OF MOBILE COMMUNICATION SYSTEM Download PDF

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Publication number
WO2006069470A1
WO2006069470A1 PCT/CN2004/001535 CN2004001535W WO2006069470A1 WO 2006069470 A1 WO2006069470 A1 WO 2006069470A1 CN 2004001535 W CN2004001535 W CN 2004001535W WO 2006069470 A1 WO2006069470 A1 WO 2006069470A1
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Prior art keywords
time slot
service
abis interface
resource pool
time slots
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PCT/CN2004/001535
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English (en)
French (fr)
Inventor
Zhihao Meng
Qinhua Zhu
Xue Tang
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ZTE Corp
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ZTE Corp
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Priority to CNB2004800442073A priority Critical patent/CN100525480C/zh
Priority to HK07109219.9A priority patent/HK1101313B/zh
Priority to BRPI0419252-4A priority patent/BRPI0419252A/pt
Priority to PCT/CN2004/001535 priority patent/WO2006069470A1/zh
Publication of WO2006069470A1 publication Critical patent/WO2006069470A1/zh
Anticipated expiration legal-status Critical
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
    • H04W16/02—Resource partitioning among network components, e.g. reuse partitioning
    • H04W16/06—Hybrid resource partitioning, e.g. channel borrowing
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
    • H04W16/02—Resource partitioning among network components, e.g. reuse partitioning
    • H04W16/04—Traffic adaptive resource partitioning
    • 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
    • H04W72/0446—Resources in time domain, e.g. slots or frames
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/50—Allocation or scheduling criteria for wireless resources
    • H04W72/56—Allocation or scheduling criteria for wireless resources based on priority criteria

Definitions

  • the present invention relates to the field of mobile communication technologies, and in particular, to a method for dynamically allocating transmission time slots for Abis interfaces in a mobile communication system for different service rates. Background technique
  • the GSM base station subsystem generally adopts the structure shown in FIG.
  • the BSC is a base station controller
  • the BTS is a base transceiver station
  • the CCU is a channel coding unit.
  • the mapping of the terrestrial circuit Abis interface between the wireless port (Um), the BTS and the BSC is completed by the base transceiver station.
  • the GSM system generally uses 16kbit/s circuit time slots as the minimum unit on the Abis interface.
  • the rate does not exceed 16 kbit/s, so the channel of the wireless port and the 16 kbit/s time slot of the Abis interface are one. A mapping comes over.
  • the wireless port channel when the wireless port channel is used for packet services, the coding and modulation modes are different, and the rates are also different, as shown in Table 1.
  • the MCS-3 ⁇ MCS-9 encoding mode When the MCS-3 ⁇ MCS-9 encoding mode is adopted, the channel of one wireless port is required to correspond to the time slot of 2 ⁇ 5 Abis interfaces.
  • the circuit time slot of the Abis interface corresponds, and at the same time, a part of the time slot is taken out from the Abis interface as a backup resource.
  • the required bandwidth of the traffic channel exceeds one Abis interface circuit time slot, one or more of the spare resources are taken out.
  • the packet traffic channel of this wireless port corresponds.
  • the patent application number is
  • the disadvantage of this method is that the spare resources are only used for packet services, and the utilization of the alternate resources in all services is not considered comprehensively.
  • the circuit resources of the Abis interface are not only used in packet services, but more importantly in the processing of voice services.
  • the operator's purpose is to provide users with maximum services with limited resources. Therefore, the backup resources of the Abis interface are fully considered and allocated according to the real-time needs of all services of the system, so as to maximize the efficiency of resource utilization. , better meet business needs.
  • one traffic channel of the original wireless port can be converted into two service channels supporting HR. Since the actual 8 kbit/s bandwidth can carry one HR voice service, the minimum unit time of the circuit slot of the general Abis interface is 16 kbit. /s, so the current practice of supporting HR is: When a traffic channel that originally supports the FR of the wireless interface is converted into two traffic channels supporting HR, the Abis interface is required to have two time slots; Fixed for the two HR voice services, which will greatly waste the Abis interface resources. At the same time, because some spare time slot resources of the Abis interface serve as backup resources for the packet service, the Abis interface time slot resources are very tight and can be converted into HR. The channel is thus also greatly limited.
  • invention disclosure It is an object of the present invention to provide a method for sharing and dynamically allocating spare time slot resources of an Abis interface, thereby more effectively and fully utilizing Abis interface resources.
  • the present invention divides the Abis interface time slot resource into two parts: a primary time slot and an alternate resource pool.
  • the primary time slot refers to mapping the original wireless port traffic channel to a single time slot of the Abis interface
  • the standby resource pool is Refers to all time slots remaining on the Abis interface, and defines the time slots in the spare resource pool as time slots.
  • the service is uniformly requested from the standby resource pool regardless of the service.
  • the application priority of the voice service and the packet service is set, so that the backup resource pool can meet the requirements of each service in turn according to the priority of each service.
  • the present invention provides a method for dynamically allocating transmission time slots in an Abis interface of a GSM system, comprising the steps of:
  • Step 1 The Abis interface ground circuit is set to a minimum time slot as a basic unit, and a part of the wireless port traffic channel is associated with a part of the Abis interface time slot, and the time slot is set as a primary time slot; and then the Abis interface is partially or completely
  • the idle time slot is set as an alternate resource pool, and the time slot in the spare resource pool is a time slot;
  • Step 2 When each service of the system needs more Abi s interface time slots, apply to the standby resource pool for a time slot, and the standby resource pool determines whether to provide a time slot according to the standby resource condition; Step 3: When the service of the system no longer needs too many Abis interface time slots, the occupied time slots will be released and the standby resource pool will be used.
  • a step of setting a priority of each service request with a time slot is further included between step 1 and step 2; in the step 2, when determining to provide a time slot, the standby resource
  • the pool further provides an order of time slots according to the priority of each service.
  • the priority of the time slots of the various service applications of the system is set to be the same.
  • the time slot is set to the "assigned" state, and the wireless port channel and the Abis port are The corresponding relationship with the time slot is notified to the base transceiver station.
  • the system in the third step, when the system reclaims the released time slot, it is set to an "unallocated" state, and the wireless port traffic channel is no longer sent to the base station corresponding to the attached time slot.
  • Transceiver station when the system reclaims the released time slot, it is set to an "unallocated" state, and the wireless port traffic channel is no longer sent to the base station corresponding to the attached time slot.
  • the present invention provides a device for time slot resource allocation of an Abis interface in a GSM system, It includes a base station controller, a base transceiver station, and a base station controller and a base transceiver station
  • An Abis interface wherein the Abis interface is based on a minimum time slot; the device further includes: a primary time slot and an alternate resource pool determining module, configured to allocate an Abis interface time slot corresponding to the wireless port traffic channel as a primary time slot, The remaining idle time slots of the Abis interface are standby resource pools, and the time slots in the standby resource pool are time slots; a time slot requesting module is configured to determine whether a certain type of service of the system needs more Abis interface time slot resources.
  • a time slot providing module configured to determine whether to provide a time slot according to the condition of the standby resource when each service of the system applies for a time slot to the backup resource pool;
  • the slot recovery module is configured to reclaim the time slot provided to the standby resource pool for use when the service of the system no longer needs too many Abis interface time slots.
  • the device further includes a priority setting module, configured to determine a priority of a time slot of each service request provided by the system; and the time slot providing module provides priority according to each service when the time slot can be provided The level determination provides an order of time slots.
  • the priority setting module sets the priority of each type of service request slot attached by the system to be the same.
  • the time slot providing module sets a time slot in the spare resource pool to a type of service, sets the time slot to an "allocated" state, and notifies the base station to send and receive.
  • the time slot collection module is set to an "unallocated" state when the time slot is reclaimed, and the wireless port traffic channel is no longer sent to the base station transceiver corresponding to the time slot. station.
  • each time slot of the spare resource pool of the same terrestrial circuit can be dynamically used with the primary time slot in the terrestrial circuit.
  • the present invention has the following advantages:
  • FIG. 1 is a schematic diagram of the location of the Abis interface in a mobile communication system
  • FIG. 2 is a schematic diagram showing the dynamic use of time slots of various services according to the method of the present invention, taking voice service and packet service as an example.
  • FIG. 3 is a schematic flow chart of requesting a time slot from a spare resource pool in an Abis interface time slot resource allocation method in a mobile communication system according to the present invention.
  • FIG. 4 is a flow chart showing the return of a time slot to an alternate resource pool in the Abis interface time slot resource allocation method in the mobile communication system according to the present invention.
  • FIG. 5 is a block diagram of an Abis interface time slot resource allocation apparatus in a mobile communication system according to the present invention. The best way to implement the invention
  • the Abis interface time slot resource is divided into a primary time slot and a spare resource pool, wherein the voice channel FR and HR channel of the wireless interface are mapped to the time slot of the Abis interface as the primary time slot A, and the remaining idle time slots are used.
  • the time slot is attached to the spare resource pool A'.
  • the voice channel capacity needs to be increased, that is, one FR voice channel of the wireless port is converted into two HR voice channels, or for the packet service, when the wireless environment satisfies the condition that the transmission quality is good enough, the system decides that When the wireless channel corresponding to point A is converted to the MCS-3 and the above mode, the time slot is requested to be attached to the spare resource pool; wherein, the application priority of various services, such as voice service and packet service, is set, so that the standby resource is used.
  • the pool can meet the requirements of each service in turn according to the priority of each service.
  • FIG. 3 is a schematic flow chart of requesting a time slot from a spare resource pool in an Abis interface time slot resource allocation method in a mobile communication system according to the present invention.
  • an Abis interface with a time slot is added as an example to illustrate how the system implements the expansion of the Abis interface time slot. The main steps are as follows:
  • Step S31 The system pre-sets the A point of the Abis interface as the primary time slot, that is, corresponds to a wireless channel, and sets the remaining idle time slots as the standby resource pool;
  • Step S32 Determine whether a certain type of service of the system needs more Abis interface time slots to provide more services. For example, when the voice channel congestion reaches a certain level, the voice channel capacity needs to be increased, that is, one FR voice channel of the wireless port is converted into two HRs. Voice channel, or for packet services, when the wireless environment is satisfied When the transmission quality is good enough, the system decides to convert the wireless channel corresponding to point A to MCS-3 and above, and if necessary, step S33;
  • Step S33 Allocating one or more attached time slots to the standby resource pool request
  • Step S34 The standby resource pool determines whether to allocate according to the priority of the application and the idle resource idle condition. If the resource is rejected, the allocation fails, and the process ends. If the allocation receives the time slot A', the process proceeds to step S35, and the status is set to "allocated" to prevent the time slot from being redistributed by other wireless channels;
  • Step S36 The corresponding relationship between the wireless channel and the A and A' points is sent to the base station transmitting and receiving station, and the entire operation process ends normally.
  • FIG. 4 is a flow chart showing the return of a time slot to an alternate resource pool in the Abis interface time slot resource allocation method in the mobile communication system according to the present invention.
  • a wireless channel no longer requires an Abis interface with a time slot as an example, and specifically describes how the system implements the return of the Abis interface with a time slot, which mainly includes the following steps:
  • Step S41 The system has used the primary slot A point and the attached slot A' point on the Abis interface;
  • Step S42 When a certain type of service of the system no longer needs too many Abis interface time slot resources, such as a large decline for voice services After, or when the wireless environment deteriorates, the packet service is changed to use the MCS-3 code and the above to use the MCS-1 code or the MCS-2 code to notify the backup resource pool to recover the resource;
  • Step S43 The standby resource pool recovers the time slot A' point
  • Step S44 setting the status of the recovered time slot A' point to the "unallocated" state, so that the time slot can be redistributed by other wireless channels;
  • Step S45 The wireless port service channel is no longer sent to the base transceiver station in the relationship corresponding to the time slot A', and the entire operation process ends normally.
  • FIG. 5 is a block diagram showing a preferred embodiment of an apparatus for Abis interface time slot resource allocation in a mobile communication system in accordance with the present invention, wherein an Abis interface 520 is disposed between the base station controller 510 and the base transceiver station 580, Abis The interface 520 is divided into a plurality of slots by a minimum time slot as a basic unit.
  • the method further includes: a primary time slot and a spare resource pool determining module 530, which uses a time slot of the Abis interface 520 that associates with the wireless port traffic channel.
  • the remaining time slot of the Abis interface 520 is used as a spare resource pool, and the time slot in the spare resource pool is a time slot.
  • the priority setting module 540 determines the priority of each service application with a time slot provided by the system, but when the processing is simplified, the various service applications provided by the system may be attached.
  • the priority of the time slots is set to be the same.
  • the time slot requesting module 550 is configured to determine whether a certain type of service of the system needs more Abis interface time slot resources, and apply for a time slot to the standby resource pool when needed.
  • the time slot providing module 560 is configured to determine whether to provide a time slot according to the condition of the standby resource when each service of the system applies for a time slot to the backup resource pool, and when determining to provide the attached time slot, determine according to the priority of the service. Provide an order of time slots.
  • the time slot providing module 560 allocates a time slot in the spare resource pool to a type of service, the time slot is set to the "allocated" state, and the base transceiver station 580 is notified of the wireless port channel and Abis. The corresponding relationship of the time slot is attached.
  • a time slot recovery module 570 is provided.
  • the time slot that is provided to it is recycled to the standby resource pool for use, and is set to an "unallocated" state. And the wireless port traffic channel is no longer sent to the base transceiver station 580 corresponding to the attached time slot.
  • the invention is mainly used in the GSM mobile communication system, and the time slot resources of the Abis interface are divided into the primary time slot and the standby resource pool, and the spare resource pool is shared and fully allocated according to the real-time needs of all services of the system, thereby maximizing the maximum
  • the time slot resource utilization of the Abis interface is improved, and the service requirements can be better met.

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  • Computer Networks & Wireless Communication (AREA)
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Description

一种在移动通信系统的 Abis接口中动态分配传输时隙的方法 技术领域
本发明涉及移动通信技术领域， 尤其涉及一种移动通信系统中的 Abis接 口针对不同的业务速率而动态分配传输时隙的方法。 背景技术
通讯系统在社会生活中正在发挥着日益重要的作用， 人们对于通讯需求的 增长推动着通讯系统技术的迅速发展， 尤其是移动通信系统， 从传统的 GSM 系统向 GPRS系统 （General Packet Radio Service, 通用分组无线系统） 迅 速演进。 为了提供更高的通信带宽， 满足多种类的实时分组业务要求， 又发展 了 EGPRS系统 （Enhance GPRS ); 另一方面， 由于 GSM用户群的不断增长， 运 营商为了在不过多增加投资的前提下能为更多的用户提供语音服务， 对 HR (Half-Rate ) 语音业务的需求也越来越多， 特别是要求系统针对不同时段， 能够将 FR (Full-Rate)信道自动转换为 HR信道以支持更多信道或对 HR信道 合并为 FR信道以提供更好通话质量。
GSM基站子系统， 一般采用图 1所示的结构。 在图 1中， BSC是基站控制 器， BTS是基站收发信台， CCU是信道编码单元。 由基站收发信台完成无线口 (Um)、 BTS和 BSC间的地面电路 Abis接口的映射。 GSM系统在 Abis接口一般 采用 16kbit/s的电路时隙为最小单位。 这样在最初的 GSM系统中， 由于无线 口的业务信道在承载语音业务或分组业务时， 其速率都不会超过 16kbit/s， 所以无线口的信道和 Abis接口的 16kbit/s的时隙是一一映射过来的。但是在 EGPRS系统中， 其无线口信道用于分组业务时， 采用的编码和调制方式不同， 速率也不同， 如表 1所示。 当采用 MCS-3〜MCS- 9编码方式时， 要求一个无线口 的信道对应到 2〜5个 Abis接口的时隙。
表 1
调制编码方案 最大速率
[kbp/s]
MCS-9 59. 2
MCS-8 59. 2
MCS-7 44. 8 MCS-6 29. 6
MCS-5 22. 4
MCS-4 17. 6
MCS-3 14. 8
MCS-2 11. 2
MCS-1 8. 8 对此， 目前比较好的解决方法是， 先将无线口的一个分组业务信道与一个
Abis接口的电路时隙对应， 同时另从 Abis接口中取出一部分时隙做为备用资 源， 当此业务信道所需带宽超过一个 Abis接口电路时隙时， 再从备用资源中 取出一个或多个与此无线口的分组业务信道对应。 例如， 专利申请号为
01126612. 0的中国专利 "一种通用分组无线服务数据帧信号传输方法"针对 GPRS业务中的 CS-3、 CS-4分组业务就是这样进行处理的。
这种方法的缺点是将备用资源仅用于分组业务， 没有综合考虑备用资源在 所有业务中的利用。 Abis接口的电路资源不仅要在分组业务时使用， 更重要 的是在语音业务处理时使用。对 GSM系统而言， 运营商的目的是用有限的资源 最大限度的给用户提供服务， 所以将 Abis接口的备用资源根据系统所有业务 的实时需要全面考虑分配， 才能最大限度地提高资源的使用效率， 更好地满足 业务需求。
对于 HR语音业务， 原来无线口的一个业务信道可以转化为两个支持 HR 的业务信道， 由于实际 8kbit/s带宽就可以承载一路 HR语音业务， 但是由于 一般 Abis接口的电路时隙最小单位为 16kbit/s， 所以目前支持 HR的做法是： 实现无线口原来支持 FR的一个业务信道转换为支持 HR的两个业务信道时， 就 要求 Abis接口有两个时隙； 由于这两个时隙只能固定为这两个 HR语音业务所 用， 将极大地浪费了 Abis接口资源； 同时由于 Abis接口一部分备用时隙资源 作为了分组业务的备用资源， 所以 Abis接口时隙资源非常紧张， 能够转换为 HR的信道也因而受到很大的限制。
由上面所述可知， 由于现有技术对各类业务， 如语音业务和分组业务， 分 开考虑， 造成其 Abis接口时隙资源利用率差的缺陷。 发明公开 本发明的目的在于提供一种对 Abis接口备用时隙资源共享并进行动态分 配的方法， 从而更有效、 充分地利用 Abis接口资源。
为实现上述目的， 本发明将 Abis接口时隙资源分为主时隙和备用资源池 两部分， 其中主时隙是指将原无线口业务信道映射在 Abis接口的单个时隙， 备用资源池是指 Abis接口剩余的所有时隙， 且将备用资源池中的时隙定义为 附时隙。 当系统某类业务需要更多时隙时， 不论是何种业务， 都统一向备用资 源池请求。 其中， 设定各种业务， 如语音业务和分组业务的申请优先级， 使备 用资源池可以根据各业务的优先级依次满足各业务的需求。
基于此， 一方面， 本发明提供一种在 GSM系统的 Abis接口中动态分配传 输时隙的方法， 其包括如下步骤：
步骤一， 将 Abis接口地面电路以最小时隙为基本单位， 使部分无线口业 务信道与部分 Abis接口时隙建立对应关系， 并将该时隙设置为主时隙； 再将 Abis接口部分或全部空闲时隙设置为备用资源池， 所述备用资源池内的时隙 为附时隙；
步骤二， 当系统的各业务需要更多的 Abi s接口时隙时， 向所述备用资源 池申请附时隙， 所述备用资源池根据备用资源情况决定是否提供附时隙； 步骤三， 当系统的业务不再需要过多的 Abis接口时隙时， 将释放所占用 附时隙， 还给备用资源池待用。
根据本发明的方法，在步骤一和步骤二之间还包括一设置系统各业务申请 附时隙优先级的步骤； 在所述的步骤二中， 在确定提供附时隙时， 所述备用资 源池进一步根据各业务的优先级决定提供附时隙的次序。
根据本发明的方法，在简化处理时， 设置所述系统各类业务申请附时隙的 优先级相同。
根据本发明的方法，在系统将所述备用资源池中的一附时隙分配给一类业 务的同时， 将该附时隙设置为 "己分配" 的状态， 且将无线口信道与 Abis口 附时隙的对应关系通知基站收发信台。
根据本发明的方法， 在所述步骤三，在系统回收所释放的附时隙时将其设 置为 "未分配"状态， 且将无线口业务信道不再与该附时隙对应下发至基站收 发信台。
另一方面，本发明提供一种 GSM系统中 Abis接口的时隙资源分配的装置， 其包括基站控制器、 基站收发信台、 以及连接基站控制器和基站收发信台的
Abis接口， 其中 Abis接口以最小时隙为基本单位； 该装置还包括， 主时隙和 备用资源池确定模块， 用于将与无线口业务信道建立对应关系的 Abis接口时 隙为主时隙， 而该 Abis接口的其余空闲时隙为备用资源池， 该备用资源池内 的时隙为附时隙； 附时隙请求模块， 用于判断系统某类业务是否需要更多的 Abis接口时隙资源， 并且在需要时向备用资源池申请附时隙； 附时隙提供模 块， 用于当系统的各业务向备用资源池申请附时隙时， 根据备用资源的情况确 定是否提供附时隙； 附时隙回收模块，用于当系统的业务不再需要过多的 Abis 接口时隙时， 将提供给其的附时隙回收到备用资源池待用。
根据本发明的装置，进一步包括优先级设定模块， 用于确定系统提供的各 业务申请附时隙的优先级； 所述的附时隙提供模块在能够提供附时隙时根据各 业务的优先级确定提供附时隙的次序。
根据本发明的装置， 在简化处理时， 所述优先级设定模块将系统提供的各 类业务申请附时隙的优先级设定为相同。
根据本发明的装置，所述附时隙提供模块在将备用资源池中的一附时隙分 配给一类业务的同时， 将该附时隙设置为 "已分配"的状态， 且通知基站收发 信台无线口信道与 Abis口附时隙的对应关系。
根据本发明的装置， 所述附时隙回收模块， 在回收附时隙时将其设置为 "未分配"状态， 且将无线口业务信道不再与该附时隙对应下发至基站收发信 台。
由于备用资源池是基于每一 Abis接口地面电路的， 所以同一地面电路的 备用资源池的每个附时隙都可以动态地与此地面电路中的主时隙一起使用。
本发明采用上述方案后， 有如下优点：
1、 大大地提高了地面资源利用率， 最大限度地满足系统要求；
2、 根据业务优先级共享 Abis接口地面资源， 提高了资源共享的灵活性， 更好地满足用户需求；
3、 能够在现有硬件基础上提供尽量多的 HR语音业务。 附图简要说明
图 1是 Abis接口在移动通信系统中的位置示意图 图 2根据本发明的方法， 以语音业务和分组业务为例， 说明各类业务动态 使用附时隙的示意图。
图 3是根据本发明所述的移动通信系统中 Abis接口时隙资源分配方法的 从备用资源池中请求附时隙的流程示意图。
图 4是根据本发明所述的移动通信系统中 Abis接口时隙资源分配方法的 将附时隙归还备用资源池的流程示意图。
图 5是本发明所揭示的移动通信系统中 Abis接口时隙资源分配装置方框 图。 实现本发明的最佳方式
下面结合附图对本发明作进一步阐述。
图 2是根据本发明的方法， 以语音业务和分组业务为例， 说明各类业务动 态地使用附时隙的示意图。 如图 2所示， Abis接口时隙资源被分成主时隙和 备用资源池， 其中无线口的语音信道 FR、 HR信道映射在 Abis接口的时隙为主 时隙 A， 其余的空闲时隙作为附时隙而存在于备用资源池 A'中。 当系统某类业 务需要更多时隙时， 不论是何种业务， 都统一向备用资源池 A'请求。 如语音信 道拥塞达到一定程度时，需要提高语音信道容量，即将无线口一个 FR语音信道 转换为两个 HR语音信道，或者对于分组业务，当无线环境满足传输质量足够好 的条件时， 系统决定将 A点对应的无线信道转为 MCS- 3及以上方式使用时， 则 向备用资源池请求附时隙； 其中， 设定各种业务， 如语音业务和分组业务， 的 申请优先级， 使备用资源池可以根据各业务的优先级依次满足各业务的需求。
图 3是根据本发明所述的移动通信系统中 Abis接口时隙资源分配方法的 从备用资源池中请求附时隙的流程示意图。 图 3中， 以一个信道需要增加 Abis 接口附时隙为例， 具体说明系统是如何实现 Abis接口时隙的扩展， 其主要包 括以下步骤：
步骤 S31: 系统预先将 Abis接口的 A点设为主时隙， 即对应一无线信道， 并将其余空闲的时隙设为备用资源池；
步骤 S32: 判断系统的某类业务是否需要更多 Abis接口时隙以提供更多 服务， 如语音信道拥塞达到一定程度时，需要提高语音信道容量，即将无线口一 个 FR语音信道转换为两个 HR语音信道,或者对于分组业务，当无线环境满足传 输质量足够好的条件时， 系统决定将 A点对应的无线信道转为 MCS-3及以上方 式使用， 如需要则执行步骤 S33;
步骤 S33: 向备用资源池请求分配一条或多条附时隙；
步骤 S34: 备用资源池根据申请的优先级和备用资源空闲情况决定是否分 配， 如果拒绝， 则分配失败， 流程结束； 如果分配得到附时隙 A' 点， 则执行 步骤 S35， 将其状态设为 "已分配" ， 目的是避免该时隙被其它无线信道重分 配；
步骤 S36， 将无线信道与 A、 A' 点的对应关系下发至基站发收信台， 至此 整个操作流程正常结束。
图 4是根据本发明所述的移动通信系统中 Abis接口时隙资源分配方法的 将附时隙归还备用资源池的流程示意图。 在图 4中， 以一个无线信道不再需要 Abis接口附时隙为例， 具体说明系统是如何实现 Abis接口附时隙的归还的， 其主要包括以下步骤：
步骤 S41 : 系统已使用了 Abis接口上的主时隙 A点和附时隙 A'点； 步骤 S42: 当系统某类业务不再需要过多 Abis接口时隙资源时， 如对于 语音业务大大下降后， 或当无线环境恶化时， 分组业务由使用 MCS-3编码及以 上改为使用 MCS- 1编码或 MCS- 2编码， 通知备用资源池回收资源；
步骤 S43: 备用资源池回收该附时隙 A'点；
步骤 S44: 将回收的附时隙 A'点的状态设为 "未分配"状态， 目的是使该 时隙能被其它无线信道重分配；
步骤 S45: 将无线口业务信道不再与附时隙 A' 点对应的关系下发至基站 收发信台， 至此整个操作流程正常结束。
图 5给出了根据本发明的移动通信系统中 Abis接口时隙资源分配的装置 的最佳实施例的方框图， 其中， Abis接口 520设置在基站控制器 510和基站 收发信台 580之间， Abis接口 520以最小时隙为基本单位划分为多个时隙。 如图所示， 在本发明的 Abis接口时隙资源分配装置中， 还包括： 主时隙和备 用资源池确定模块 530，其将与无线口业务信道建立对应关系的 Abis接口 520 的时隙作为主时隙； 而将 Abis接口 520的其余空闲时隙作为备用资源池， 该 备用资源池内的时隙为附时隙。 优先级设定模块 540， 其确定系统提供的各业 务申请附时隙的优先级， 但在简化处理时， 可以将系统提供的各类业务申请附 时隙的优先级设定为相同。 附时隙请求模块 550， 其判断系统某类业务是否需 要更多的 Abis接口时隙资源， 并且在需要时向备用资源池申请附时隙。 附时 隙提供模块 560， 当系统的各业务向备用资源池申请附时隙时， 其根据备用资 源的情况确定是否提供附时隙， 当确定提供附时隙时， 再根据业务的优先级确 定提供附时隙的次序。在附时隙提供模块 560将备用资源池中的一附时隙分配 给一类业务时， 将该附时隙设置为 "已分配" 的状态， 且通知基站收发信台 580无线口信道与 Abis口附时隙的对应关系。 附时隙回收模块 570， 当系统的 业务不再需要过多的 Abis接口时隙时， 其将提供给其的附时隙回收到备用资 源池待用， 并将其设置为 "未分配"状态， 且将无线口业务信道不再与该附时 隙对应下发至基站收发信台 580。
下面举例说明使用本发明的方法或装置所产生的实施效果：
以一个一般站型 S3/3/3 (即一个站点 3个小区， 每小区 3个载频）， 针对 语音业务和分组业务为例， 一般配置每个小区支持 18个 FR语音业务信道， 4 个分组业务信道， 这样 3个小区共固定分配了 （18+4) *3=66个 Abis接口电 路时隙（16kbit/s)， 这样的站型用于控制信令的 Abis接口时隙至少为 10个。 一对 Abis接口 E1传输所提供的总的时隙数为 128个， 而时钟同步要用去 4 个， 这样， 最终能做为备用资源的只有： 128-66- 10- 4=48个。 假设 48个空闲 时隙一半固定分配用于 HR语音业务， 一半用于分组业务， 那么支持的最大语 音信道为 18*3+24=78， 最大能用于分组业务的总时隙数为 4*3+24=36。 而如果 使用本发明， 则空闲时隙最大可全部用来支持语音业务或分组业务， 这样支持 的最大语音信道为 18*3+48=102， 最大能用于分组业务的总时隙数为
4*3+48-60
表 2
Figure imgf000009_0001
从表 2可以看出， 在 Abis接口备用电路资源有限的情况下， 本发明算法 可以针对实际业务的需求， 更大限度地提高资源利用率。 工业应用性
本发明主要用于 GSM移动通信系统中，通过将 Abis接口的时隙资源划分 为主时隙和备用资源池，而且使备用资源池共享并根据系统所有业务的实时需 要全面考虑分配， 从而最大限度地提高了 Abis接口的时隙资源利用率， 能够 更好地满足业务的需求。

Claims

权利要求书
1、一种在移动通信系统的 Abis接口中动态分配传输时隙的方法，其特征 在于， 包括如下步骤：
步骤一， 将 Abis接口地面电路以最小时隙为基本单位， 使部分无线口业 务信道与部分 Abis接口时隙建立对应关系， 并将该时隙设置为主时隙； 再将 Abis接口部分或全部空闲时隙设置为备用资源池， 所述备用资源池内的时隙 为附时隙；
步骤二， 当系统的各业务需要更多的 Abis接口时隙时， 向所述备用资源 池申请附时隙， 所述备用资源池根据备用资源情况决定是否提供附时隙； 步骤三， 当系统的业务不再需要过多的 Abis接口时隙时， 将释放所占用 附时隙， 还给备用资源池待用。
2、 根据权利要求 1所述的方法， 其特征在于， 在步骤一和步骤二之间还 包括一设置系统各业务申请附时隙优先级的步骤； 在所述的步骤二中， 在确定 提供附时隙时，所述备用资源池进一步根据各业务的优先级决定提供附时隙的 次序。
3、 根据权利要求 2所述的方法， 其特征在于， 设置所述系统各类业务申 请附时隙的优先级相同。
4、 根据权利要求 1、 2或 3所述的方法， 其特征在于， 在系统将所述备用 资源池中的一附时隙分配给一类业务的同时， 将该附时隙设置为 "己分配"的 状态， 且将无线口信道与 Abis口附时隙的对应关系通知基站收发信台。
5、 根据权利要求 1、 2或 4所述的方法， 其特征在于， 在所述步骤三， 在 系统回收所释放的附时隙时将其设置为 "未分配"状态， 且将无线口业务信道 不再与该附时隙对应下发至基站收发信台。
6、一种在移动通信系统的 Abis接口中动态分配传输时隙的装置， 其包括 基站控制器、 基站收发信台、 以及连接基站控制器和基站收发信台的 Abis接 口， 其特征在于， 所述 Abis接口以最小时隙为基本单位， 该装置还包括， 一主时隙和备用资源池确定模块，用于将与无线口业务信道建立对应关系 的 Abis接口时隙为主时隙； 而将该 Abis接口的其余空闲时隙为备用资源池， 该备用资源池内的时隙为附时隙； 一附时隙请求模块， 用于判断系统某类业务是否需要更多的 Abis接口时 隙资源， 并且在需要时向备用资源池申请附时隙；
一附时隙提供模块， 用于当系统的各业务向备用资源池申请附时隙时， 根 据备用资源的情况确定是否提供附时隙；
一附时隙回收模块， 用于当系统的业务不再需要过多的 Abis 接口时隙 时， 将提供给其的附时隙回收到备用资源池待用。
7、 根据权利要求 6所述的装置， 其特征在于， 还包括一优先级设定模块， 用于确定系统提供的各业务申请附时隙的优先级； 所述的附时隙提供模块在能 够提供附时隙时根据各业务的优先级确定提供附时隙的次序。
8、 根据权利要求 7所述的装置， 其特征在于， 所述优先级设定模块将系 统提供的各类业务申请附时隙的优先级设定为相同。
9、 根据权利要求 6所述的装置， 其特征在于， 所述附时隙提供模块在将 备用资源池中的一附时隙分配给一类业务的同时，将该附时隙设置为"已分配" 的状态， 且将无线口信道与 Abis口附时隙的对应关系通知基站收发信台。
10、 根据权利要求 6所述的装置， 其特征在于， 所述附时隙回收模块， 在 回收附时隙时将其设置为 "未分配"状态， 且将无线口业务信道不再与该附时 隙对应下发至基站收发信台。
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