WO2011026373A1 - 发射功率的处理方法及装置 - Google Patents

发射功率的处理方法及装置 Download PDF

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Publication number
WO2011026373A1
WO2011026373A1 PCT/CN2010/074651 CN2010074651W WO2011026373A1 WO 2011026373 A1 WO2011026373 A1 WO 2011026373A1 CN 2010074651 W CN2010074651 W CN 2010074651W WO 2011026373 A1 WO2011026373 A1 WO 2011026373A1
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WO
WIPO (PCT)
Prior art keywords
transmit power
base station
power
current
current transmit
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Application number
PCT/CN2010/074651
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English (en)
French (fr)
Inventor
曹金波
Original Assignee
中兴通讯股份有限公司
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Publication date
Application filed by 中兴通讯股份有限公司 filed Critical 中兴通讯股份有限公司
Publication of WO2011026373A1 publication Critical patent/WO2011026373A1/zh

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04—TPC
    • H04W52/38—TPC being performed in particular situations
    • H04W52/50—TPC being performed in particular situations at the moment of starting communication in a multiple access environment

Definitions

  • the present invention relates to the field of communications, and in particular to a method and apparatus for processing transmit power.
  • BACKGROUND In a code division multiple access (CDMA) mobile communication system, a terminal (Mobile Station, MS for short) and a base station (BS) perform information by establishing a wireless link. Interaction. The link from the base station to the terminal is called the forward link, and the link from the terminal to the base station is called the reverse link.
  • 1 is a schematic diagram of a simplified CDMA call flow according to the related art. As shown in FIG.
  • a simplified call setup process includes the following steps: Step 101, MS to BS The origination message is sent, and the BS demodulates the originating message from the MS on the reverse access channel.
  • Step 102 The BS sends an acknowledgement (Ack) message to the MS on the forward paging channel, and informs the MS that the call request has been received.
  • Step 103 The BS internally performs allocation of resources required for call establishment, and establishes a traffic channel.
  • Step 104 The BS sends an (Extend) Channel Assignment message to the MS on the forward paging channel.
  • Step 105 The BS sends a null frame (NULL Traffic) on the forward traffic channel, and the MS demodulates the null frame.
  • Step 106 The MS sends a prefix (Preamble), and the BS demodulates the prefix in the reverse service.
  • Step 107 The BS sends an Ack to the MS, indicating that the terminal has been successfully captured, the traffic channel works normally, and the BS is ready.
  • step 108 the MS sends an Ack to the BS, indicating that the Ack to the BS is ready for the MS.
  • Steps 105 and 106 are processes in which the base station and the terminal mutually capture, and the first interaction between the base station and the terminal on the traffic channel after the base station traffic channel is established.
  • the process of mutual acquisition ensures that the terminal can successfully demodulate the data transmitted by the base station forward traffic channel, and the base station reverse traffic channel can successfully demodulate the data sent by the terminal.
  • This process is closely related to the airborne wireless link environment.
  • the forward power control mechanism of the CDMA system includes forward fast closed loop power control and front outer loop power control.
  • the outer loop power control estimates the threshold setting value based on the Eb/Nt required for the target frame error rate (FER) to be reached by the assigned forward traffic channel.
  • FER target frame error rate
  • the transmit power level of the forward traffic channel is adjusted in time to track the instantaneous change of the wireless link, mainly relying on the forward fast closed loop power control.
  • the closed loop of the forward power control has not yet formed.
  • the base station is in an unlocked state, and the feedback of the mobile station cannot be obtained. Since there is no feedback, in step 105, when the base station forwards the traffic channel to start transmitting the null frame, it uses the fixed power to transmit according to the outer loop threshold.
  • This fixed power setting is based on the empirical value, taking a value slightly higher than the average transmit power of the traffic channel, in order to maximize the capture success rate without affecting the forward link capacity.
  • the energy level at which the mobile station receives the base station signal may remain at a demodulable threshold. If the radio link condition does not improve during the capture timer, the mobile station will never be able to solve the null frame of the base station, and will not send a reverse prefix, resulting in the capture failure. Therefore, the failure of air interface capture is still the most important reason for the failure of the call. In a normal CDMA wireless network, the total number of call failures caused by capture failures exceeds 40%.
  • the base station uses a fixed power to transmit a null frame, which may cause a failure of the acquisition and thus cause a call failure.
  • a base station transmits a null frame with a fixed power in a case where the radio link is poor in the related art, which may cause a failure in acquisition and thus a call failure
  • the main object of the present invention is to provide a A transmission power processing scheme to solve at least one of the above problems.
  • a method of processing transmit power is provided.
  • the processing method for transmitting power includes: a first step, the base station transmits a predetermined number of null frames to the mobile station on the forward traffic channel with the current transmit power; and second, the base station increases the current The power is transmitted, and the first step is performed with the increased transmit power as the current transmit power.
  • a processing apparatus for transmitting power is also provided.
  • the processing device for transmitting power is located at a base station, and includes: a sending module, configured to send, by a current transmit power, a predetermined number of null frames to a mobile station on a forward traffic channel; and a power control module, configured to send, by the sending module, a predetermined After the number of empty frames, the current transmit power is added; the scheduling module is configured to: after the power control module increases the current transmit power, schedule the transmit module with the increased transmit power as the current transmit power.
  • the base station after transmitting a predetermined number of null frames, the base station further increases the transmission power to continue transmitting the null frame, and solves the problem that the base station uses the fixed power to transmit the null frame when the radio link is poor, which may cause the capture to fail.
  • the problem of call failure which in turn achieves the success rate of air interface capture during call setup establishment in CDMA systems.
  • FIG. 1 is a schematic diagram of a simplified CDMA call flow according to the related art
  • FIG. 2 is a flowchart of a method for processing transmit power according to an embodiment of the present invention
  • FIG. 3 is a forward service according to an embodiment of the present invention.
  • FIG. 4 is a block diagram showing the structure of a processing apparatus for transmitting power according to an embodiment of the present invention
  • FIG. 5 is a block diagram showing a specific structure of a processing apparatus for transmitting power according to an embodiment of the present invention.
  • the steps shown in the flowchart of the accompanying drawings may be performed in a computer system such as a set of computer executable instructions, and although the logical order is shown in the flowchart, In some cases, the steps shown or described may be performed in a different order than that.
  • the acquisition may fail and the call fails.
  • a base station is provided to capture.
  • the method of automatically adjusting the transmit power of the forward traffic channel when transmitting a null frame to the mobile station in the process is applied to the forward power control to maximize the rate of the null frame demodulated by the mobile station, thereby improving the call setup of the CDMA system.
  • the success rate of time and space capture. 2 is a flowchart of a method for processing transmit power according to an embodiment of the present invention. As shown in FIG. 2, the method includes the following first step ⁇ and second step ⁇ first step, the base station transmits with current The power transmits a predetermined number of null frames to the mobile station on the forward traffic channel. In the second step, the base station increases the current transmit power, and performs the first step with the increased transmit power as the current transmit power.
  • the base station can increase the generated power compared to the related art to transmit the null frame at a fixed power, which can improve the success rate of the air interface capture during call setup.
  • the base station may determine whether the increased current transmit power is greater than the upper limit of the transmit power of the base station on the forward traffic channel; if the determination result is no, the base station uses the increased transmit power. Performing a first step for the current transmit power; if the determination result is yes, the base station performs the first step of the transmit power of the upper limit value for the current transmit power.
  • the base station After performing the first step of transmitting power of the upper limit of the base station to the current transmit power, the base station performs the first step and the second step with the preset initial transmit power. Preferably, if the base station satisfies the predetermined condition, the first step and the second step are stopped, wherein the predetermined condition indication comprises one of the following: the base station acquires a reverse prefix from the mobile station, and the base station presets a preset timeout. .
  • the base station can adjust the transmit power of the forward traffic channel (which may be referred to as an automatic power adjustment mechanism) when transmitting the null frame, so as to shorten the time consumption of the mobile phone to capture the base station and improve the success rate of the air interface capture.
  • FIG. 3 is a schematic diagram of the change of the transmit power of the forward traffic channel according to the embodiment of the present invention, which will be described below with reference to FIG. 3.
  • the power value transmitted by the base station as the fixed power is used as the initial value of the transmit power of the forward traffic channel (P_init), and is used as the lower threshold of the power adjustment, and the value can be pre-configured in the background; the upper threshold of the transmit power of the base station to the traffic channel (P_max) As the upper threshold for power adjustment, this value can be pre-configured in the background.
  • N_nullframe a null frame transmission count threshold
  • P_step a power adjustment step value
  • the N nullframe frame When the N nullframe frame is sent at the power level of P_init, it is sent at the power level of P init+P step. If P_init+P_step>P max, a null frame is transmitted at a power level of P max .
  • the base station transmits a null frame on the forward traffic channel according to the above mechanism until one of the following occurs: the base station solves the reverse prefix transmitted by the mobile station, or the base station acquisition timer Tm times out. If any of the above occurs, the base station exits the automatic power adjustment mechanism described above.
  • the setting of the N_nullframe and the setting of the power adjustment step value P_step will be described below.
  • the setting of the N_nullframe Since the mobile station successively solves 2 good frames as the decision of the capture base station, the setting of the N_nullframe needs to be large enough to reduce the next frame after the mobile station solves a good frame. The case of power reduction transmission. Based on the shortening of the capture time and the improvement of the capture success rate, the N_nullframe setting should be small enough to allow the transmit power to rise as fast as possible. Based on the forward link capacity considerations, the setting of N_nullframe should not be too small. Therefore, the setting of N_nullframe needs to integrate the above factors according to the actual network conditions.
  • the P_step setting should be large enough to enable the transmission power to rise as fast as possible. Based on the forward link capacity considerations, the P_step setting should not be too large to avoid excessively increasing the forward link load and reducing the capacity.
  • the setting of P_step needs to integrate the above factors according to the actual network conditions.
  • Step 1 Set the empty frame transmission threshold to 5 frames in the operation background, set the power adjustment step to 3 dB, and the lower threshold of the power adjustment to 70 mW, the upper threshold of the power adjustment.
  • the design power of the fan is configured to be 100000m; Step 2: After the forward traffic channel is established, the base station starts to send a null frame on the forward traffic channel; Step 4: 3: The base station transmits the initial power value of 70mW to the traffic channel as The current power level sends an empty frame.
  • Step 4 The base station uses the current power *2 as The new power level (for example, after transmitting 5 frames at 70 mW, transmitting at 140 mW) sends a null frame, and if the new power level is greater than the maximum power, the null frame is transmitted at the level of the maximum power.
  • Step 5 When the base station captures the timer Tm, the process is automatically suspended at any step.
  • the power rising step or the null frame transmission threshold may be dynamically adjusted to increase the power as soon as possible to shorten the acquisition time and the like.
  • the values in the foregoing embodiments may be analyzed by the OMC background tool to collect data of the transmit power of each frame of the base station during the air interface capture process.
  • the power of the null traffic transmitted by the forward traffic channel forms a sounding sequence similar to the access channel, which is beneficial to the terminal to capture the base station, and is beneficial to the CDMA system.
  • the success rate of air interface capture is beneficial to improve the call success rate indicator.
  • Embodiment 4 This embodiment combines the technical solutions of the foregoing embodiments and the preferred embodiments of the respective embodiments.
  • a processing device for transmitting power is provided, and FIG. 4 is a transmitting power according to an embodiment of the present invention.
  • the structural block diagram of the processing device includes: a sending module 42, The power control module 44, the scheduling module 46, and the structure are described in detail below.
  • the sending module 42 is configured to send a predetermined number of null frames to the mobile station on the forward traffic channel by using the current transmit power
  • the power control module 44 is configured to: after the sending module sends the predetermined number of null frames, increase the current transmit power; 46 is connected to the sending module 42 and the power control module 44 for scheduling the transmitting module with the increased transmit power as the current transmit power after the power control module increases the current transmit power.
  • FIG. 5 is a block diagram showing a specific structure of a processing apparatus for transmitting power according to an embodiment of the present invention. As shown in FIG.
  • the scheduling module 46 includes: a determining submodule 462 and a first scheduling submodule 464. description of.
  • the determining sub-module 462 is configured to determine whether the increased current transmit power is greater than an upper limit value of the base station's transmit power of the forward traffic channel;
  • the first scheduling sub-module 464 is coupled to the determining sub-module 462, configured to determine the sub-module If the judgment result is no, the transmission module is scheduled with the increased transmission power as the current transmission power.
  • the scheduling module 46 further includes: a second scheduling sub-module 466, configured to: when the determination result of the determining sub-module is yes, the transmit power of the upper limit is the current transmit power scheduling sending module.
  • the scheduling module 46 further includes: a third scheduling sub-module 468, configured to schedule the transmitting module with a preset initial transmit power.
  • the foregoing apparatus further includes: a stopping module 50, configured to stop the sending module 42, the power control module 44, and the scheduling module 46 if the base station satisfies a predetermined condition, where the predetermined condition indication includes one of the following: Obtain the reverse prefix from the mobile station, and the preset timeout of the base station is set.
  • the forward transmit power of the base station traffic channel is dynamically adjusted, so that the base station forms a capture test on the power level of transmitting the null frame.
  • the sequence can effectively improve the probability that the mobile station demodulates the null frame, thereby effectively improving the success rate of the air interface acquisition during the call setup in the code division multiple access system.
  • modules or steps of the present invention can be implemented by a general-purpose computing device, which can be concentrated on a single computing device or distributed over a network composed of multiple computing devices.
  • they may be implemented by program code executable by the computing device, such that they may be stored in the storage device by the computing device, or they may be separately fabricated into individual integrated circuit modules, or they may be Multiple modules or steps Implemented as a single integrated circuit module.
  • the invention is not limited to any specific combination of hardware and software.

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

Description

发射功率的处理方法及装置 技术领域 本发明涉及通信领域，具体而言， 涉及一种发射功率的处理方法及装置。 背景技术 在码分多址 （ Code Division Multiple Access, 简称为 CDMA ) 移动通信 系统中， 终端 (Mobile Station, 简称为 MS)和基站 (Base Station, 简称为 BS) 通过建立无线链路来进行信息的交互。 基站到终端的链路称为前向链路， 终 端到基站的链路称为反向链路。 图 1是根据相关技术的简化的 CDMA呼叫 流程的示意图， 如图 1所示， 以主叫终端接入基站系统为例， 一次简化的呼 叫建立流程包括如下步 4聚： 步骤 101 , MS向 BS发送起呼消息（ Origination ), BS在反向接入信道解 调出来自 MS的起呼消息。 步骤 102, BS 在前向寻呼信道发送确认 ( Ack ) 消息给 MS , 告知 MS 已收到起呼请求。 步骤 103 , BS内部进行呼叫建立所需资源的分配， 并建立业务信道。 步骤 104, BS在前向寻呼信道发送 (扩展)信道指配消息（ (Extend) Channel Assignment ) 给 MS。 步骤 105 , BS在前向业务信道发送空帧 （ NULL Traffic ), MS解调出空 帧。 步骤 106, MS发送前缀（ Preamble ), BS在反向业务解调出前缀。 步骤 107, BS向 MS发送 Ack, 表示已成功捕获终端， 业务信道工作正 常， BS就绪。 步骤 108, MS向 BS发送 Ack, 表示) 到 BS的 Ack, MS就绪。 步骤 109, BS与 MS进行业务协商与通话过程。 其中， 步骤 105与步骤 106是基站与终端互相捕获的过程， 是基站业务 信道建立后， 基站和终端在业务信道上的第一次交互。 通过互相捕获的过程 保证终端能成功解调基站前向业务信道发送的数据， 以及基站反向业务信道 能成功解调终端发送的数据。 这个过程和空中无线链路环境密切相关。 CDMA 系统的前向功率控制机制包括前向快速闭环功控与前向外环功 控。 外环功率控制才艮据指配的前向业务信道要达到的目标误帧率 （FER ) 所 需的 Eb/Nt来估算门限设置值。 根据无线链路的瞬时变化来及时调整前向业 务信道的发射功率水平， 来艮踪上无线链路的瞬时变化， 主要依靠前向快速 闭环功控。 而在上述步 4聚 105、 步 4聚 106步成功捕获前， 前向功控的闭环回路尚未 形成， 此时基站处于失锁状态， 无法得到移动台的反馈。 由于没有反馈， 在 第 105步， 基站前向业务信道开始发送空帧时， 才艮据外环门限， 釆用固定功 率发射。 这个固定功率的设置根据经验值， 取一个稍高于业务信道平均发射 功率的值， 以求在对前向链路容量影响不大的情况下尽量提高捕获成功率。 但是在无线链路较差的情况下， 移动台接收到基站信号的能量水平可能一直 氐于可解调的门限。 如果在捕获定时器的时间内， 无线链路情况没有改善， 移动台就会始终无法解出基站的空帧， 也就不会发送反向前缀， 从而导致捕 获失败。 所以空口的捕获失败仍然是呼叫失败原因中最主要的原因。 一个正 常的 CDMA 无线网络， 由捕获失败导致的呼叫失败占总的呼叫失败比例超 过 40%。 针对相关技术中无线链路较差的情况下基站釆用固定功率发送空帧而可 能导致捕获失败进而导致呼叫失败的问题， 目前尚未提出有效的解决方案。 发明内容 针对相关技术中无线链路较差的情况下基站釆用固定功率发送空帧而可 能导致捕获失败进而导致呼叫失败的问题而提出本发明， 为此， 本发明的主 要目的在于提供一种发射功率的处理方案， 以解决上述问题至少之一。 为了实现上述目的， 才艮据本发明的一个方面， 提供了一种发射功率的处 理方法。 才艮据本发明的发射功率的处理方法包括： 第一步骤， 基站以当前发射功 率在前向业务信道向移动台发送预定数量的空帧； 第二步骤， 基站增加当前 发射功率， 并以增加后的发射功率为当前发射功率执行第一步骤。 为了实现上述目的， 根据本发明的另一个方面， 还提供了一种发射功率 的处理装置。 根据本发明的发射功率的处理装置， 位于基站， 包括： 发送模块， 用于 以当前发射功率在前向业务信道向移动台发送预定数量的空帧； 功率控制模 块， 用于在发送模块发送预定数量的空帧之后， 增加当前发射功率； 调度模 块， 用于在功率控制模块增加当前发射功率之后， 以增加后的发射功率为当 前发射功率调度发送模块。 通过本发明， 釆用基站在发送预定数量的空帧后， 加大发射功率继续发 送空帧， 解决了无线链路较差的情况下基站釆用固定功率发送空帧而可能导 致捕获失败进而导致呼叫失败的问题， 进而达到了提高 CDMA 系统呼叫建 立时空口捕获的成功率效果。 附图说明 此处所说明的附图用来提供对本发明的进一步理解， 构成本申请的一部 分， 本发明的示意性实施例及其说明用于解释本发明， 并不构成对本发明的 不当限定。 在附图中： 图 1是根据相关技术的简化的 CDMA呼叫流程的示意图； 图 2是 居本发明实施例的发射功率的处理方法的流程图； 图 3是 居本发明实施例的前向业务信道发射功率变化示意图； 图 4是 居本发明实施例的发射功率的处理装置的结构框图； 图 5是 居本发明实施例的发射功率的处理装置具体的结构框图。 具体实施方式 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 征可以相互组合。 下面将参考附图并结合实施例来详细说明本发明。 在以下实施例中， 在附图的流程图示出的步 4聚可以在诸如一组计算机可 执行指令的计算机系统中执行， 并且， 虽然在流程图中示出了逻辑顺序， 但 是在某些情况下， 可以以不同于此处的顺序执行所示出或描述的步骤。 实施例一 考虑到相关技术中无线链路较差的情况下基站釆用固定功率发送空帧而 可能导致捕获失败进而导致呼叫失败的问题， 在本实施例中， 提供了提供一 种基站在捕获过程中向移动台发送空帧时自动调节前向业务信道发射功率的 方法， 应用于前向功率控制当中， 以最大程度的增加移动台解调出空帧的既 率， 从而提高 CDMA系统呼叫建立时空口捕获的成功率。 图 2是才艮据本发明实施例的发射功率的处理方法的流程图，如图 2所示， 该方法包括如下的第一步^ ^和第二步^^ 第一步骤， 基站以当前发射功率在前向业务信道向移动台发送预定数量 的空帧； 第二步骤， 基站增加当前发射功率， 并以增加后的发射功率为当前发射 功率执行第一步骤。 通过上述步骤， 相比于相关技术中以固定功率发射空帧， 基站可以增加 发生功率， 这样可以提高呼叫建立时空口捕获的成功率。 优选地， 在基站增加当前发射功率之后， 基站可以判断增加后的当前发 射功率是否大于基站在前向业务信道的发射功率的上限值； 如果判断结果为 否， 则基站以增加后的发射功率为当前发射功率执行第一步骤； 如果判断结 果为是， 则基站以上限值的发射功率为当前发射功率执行第一步骤。 在基站 以上限值的发射功率为当前发射功率执行第一步骤之后， 基站以预先设置的 初始发射功率执行第一步骤和第二步骤。 优选地,在基站满足预定条件的情况下，停止执行第一步骤和第二步骤， 其中， 预定条件指示包括以下之一： 基站获取到来自移动台的反向前缀、 基 站预先设置的定制器超时。 通过本实施例， 基站可以在发送空帧时自行调整前向业务信道的发射功 率（可以称为自动功率调节机制）， 以缩短手机捕获基站的耗时， 提高空口捕 获的成功 4既率。 实施例二 本实施例综合了实施例一及其优选实施例的技术方案， 图 3是根据本发 明实施例的前向业务信道发射功率变化示意图， 下面结合图 3进行说明。 首先， 基站以固定功率发射的功率值作为前向业务信道发射功率的初始 值 （P_init ), 并作为功率调整的下门限， 该值可以在后台预先配置； 基站以 前向业务信道的发射功率上门限 （P_max ) 作为功率调整的上门限， 该值可 以在后台预先配置。 然后， 设置一个空帧发送计数门限 （N_nullframe ); 并设置一个功率调 节步长值 （P_step ), 这两个值也可以在后台预先配置。 当基站在以某一功率水平， 即当前功率 ( P current ) 发射 N_nullframe 帧之后， 即以 P_current+P_step的功率水平发送空帧。 优选地， 当 P_current+P_step>P_max时， 以 P_max的功率水平发送。 当 以 P max的水平发送 N nullframe个空帧后， 下一个 N nullframe帧以 P init 的功率水平发送。 当以 P_init 的功率水平发送 N nullframe 帧后， 再以 P init+P step的功率水平发送。如果 P_init+P_step>P max, 则以 P max的功 率水平发送空帧。 基站按上述机制在前向业务信道发送空帧， 直至之下之一情形发生： 基 站解出移动台发送的反向前缀、 或基站捕获定时器 Tm超时。 如果上述任一 种情况发生， 则基站均退出上述的自动功率调节机制。 下面对 N_nullframe的设置以及功率调节步长值 P_step的设置进行说明。 对于空帧发送计数门限 N_nullframe 的设置： 由于移动台以连续解出 2 个好帧作为捕获基站的判决， 所以 N_nullframe 的设置需要足够大， 以减少 当移动台解出一个好帧后， 下一帧降功率发送的情形。 基于缩短捕获时间， 提高捕获成功率的考虑， N_nullframe设置要足够小， 使发射功率能尽量快速 上升。 基于前向链路容量的考虑， N_nullframe 的设置不能太小。 所以 N_nullframe的设置需要根据实际的网络状况综合以上几点因素。 对于功率调节步长值 P_step的设置： 基于缩短捕获时间， 提高捕获成功 率的考虑， P_step设置要足够大， 使发射功率能尽量快速上升。 基于前向链 路容量的考虑， P_step的设置不能太大， 以免过多增加前向链路负载， 使容 量降低。 P_step的设置根据实际的网络状况需要综合以上几点因素。 实施例三 本实施例提供的方法包括如下步骤： 步骤 1 : 在操作后台设置空帧发送计数门限为 5帧， 设置功率调节步长 为 3dB, 功率调整的下门限为 70mW, 功率调整的上门限为 1260mW, 载扇 的设计功率配置为 lOOOOmW; 步骤 2: 在前向业务信道建立之后， 基站开始在前向业务信道发送空帧； 步 4聚 3: 基站以前向业务信道发射功率初始值 70mW作为当前功率水平 发送空帧。 如果在本步骤中收到移动台发送的反向前缀， 则流程结束； 如果 发送 5帧后还未收到手机发送的反向前缀， 则转步骤 4; 步骤 4: 基站以当前功率 *2作为新的功率水平（例如以 70mW发送 5帧 后， 以 140mW功率发送）发送空帧， 如果新的功率水平大于最大功率,则以 最大功率的水平发送空帧。 如果在本步骤中收到移动台发送的反向前缀， 则 流程结束； 如果以非最大功率的水平发送 5帧后还未收到手机发送的反向前 缀， 则转步骤 4; 如果以最大功率的水平发送 5帧后还未收到手机发送的反 向前缀， 则转步 4聚 3; 步骤 5： 基站捕获定时器 Tm到时， 流程处于任一步骤均自动中止。 除上述步骤 1至步骤 5之外，还可以有其他多种具体的实施方式，例如， 可以动态调整功率的上升步长或空帧发送门限， 使功率尽快上升以缩短捕获 耗时等。 另外， 上述实施例中的各项值可以通过 OMC后台工具釆集基站在 空口捕获过程中每帧的发射功率的数据分析出来。 通过实施例二和实施例三的前向业务信道发射功率的自动调整， 使得前 向业务信道发送空帧的功率形成一个类似接入信道的探测序列， 有利于终端 捕获基站， 有利于提高 CDMA 系统空口捕获的成功率， 从而有利于提高呼 叫成功率指标。 实施例四 本实施例综合上上述实施例及各个实施例中优选实施方式的技术方案， 在本实施例中， 提供了一种发射功率的处理装置， 图 4是根据本发明实施例 的发射功率的处理装置的结构框图，如图 4所示，该装置包括： 发送模块 42、 功率控制模块 44、 调度模块 46、 下面对该结构进行详细的描述。 发送模块 42 , 用于以当前发射功率在前向业务信道向移动台发送预定数 量的空帧； 功率控制模块 44 , 用于在发送模块发送预定数量的空帧之后， 增 加当前发射功率； 调度模块 46连接至发送模块 42和功率控制模块 44 , 用于 在功率控制模块增加当前发射功率之后， 以增加后的发射功率为当前发射功 率调度发送模块。 图 5是 居本发明实施例的发射功率的处理装置具体的结构框图， 如图 5所示， 该调度模块 46包括： 判断子模块 462、 第一调度子模块 464 , 下面 对该结构进行详细的描述。 判断子模块 462 , 用于判断增加后的当前发射功率是否大于基站在前向 业务信道的发射功率的上限值； 第一调度子模块 464连接至判断子模块 462 , 用于在判断子模块的判断结果为否的情况下， 以增加后的发射功率为当前发 射功率调度发送模块。 如图 5所示， 调度模块 46还包括： 第二调度子模块 466 , 该模块用于在 判断子模块的判断结果为是的情况下， 以上限值的发射功率为当前发射功率 调度发送模块。 调度模块 46还包括： 第三调度子模块 468 , 该模块用于以预 先设置的初始发射功率调度发送模块。 优选地， 上述装置还包括： 停止模块 50 , 该模块用于在基站满足预定条 件的情况下， 停止发送模块 42、 功率控制模块 44和调度模块 46 , 其中， 预 定条件指示包括以下之一： 基站获取到来自移动台的反向前缀、 基站预先设 置的定制器超时。 综上所述， 通过本发明的上述实施例， 在基站发送空帧的过程中， 动态 调整了基站业务信道的前向发射功率， 使基站在发送空帧的功率水平上形成 了一个个捕获试探序列， 能有效提高移动台解调出空帧的概率， 从而能有效 提高码分多址系统中在呼叫建立时空中接口捕获的成功率。 显然， 本领域的技术人员应该明白， 上述的本发明的各模块或各步骤可 以用通用的计算装置来实现， 它们可以集中在单个的计算装置上， 或者分布 在多个计算装置所组成的网络上， 可选地， 它们可以用计算装置可执行的程 序代码来实现， 从而， 可以将它们存储在存储装置中由计算装置来执行， 或 者将它们分别制作成各个集成电路模块， 或者将它们中的多个模块或步骤制 作成单个集成电路模块来实现。 这样， 本发明不限制于任何特定的硬件和软 件结合。 以上所述仅为本发明的优选实施例而已， 并不用于限制本发明， 对于本 领域的技术人员来说， 本发明可以有各种更改和变化。 凡在本发明的 ^"神和 原则之内， 所作的任何修改、 等同替换、 改进等， 均应包含在本发明的保护 范围之内。

Claims

权 利 要 求 书
1. 一种发射功率的处理方法， 其特征在于， 包括：
第一步 4聚， 基站以当前发射功率在前向业务信道向移动台发送预定 数量的空帧；
第二步骤， 所述基站增加当前发射功率， 并以增加后的发射功率为 当前发射功率执行第一步骤。
2. 根据权利要求 1所述的方法， 其特征在于， 在所述基站增加当前发射功 率之后， 所述方法还包括：
所述基站判断所述增加后的当前发射功率是否大于所述基站在所述 前向业务信道的发射功率的上限值； 如果判断结果为否， 则所述基站以 增加后的发射功率为当前发射功率执行所述第一步骤。
3. 根据权利要求 2所述的方法， 其特征在于， 在所述基站判断所述增加后 的当前发射功率是否大于所述基站在所述前向业务信道的发射功率的上 限值之后， 所述方法还包括：
如果所述判断结果为是， 则所述基站以所述上限值的发射功率为当 前发射功率执行所述第一步骤。
4. 根据权利要求 3所述的方法， 其特征在于， 在所述基站以所述上限值的 发射功率为当前发射功率执行所述第一步骤之后， 所述方法还包括： 所述基站以预先设置的初始发射功率执行所述第一步骤和所述第二 步骤。
5. 根据权利要求 1至 4中任一项所述的方法， 其特征在于， 还包括： 在所述基站满足预定条件的情况下， 停止执行所述第一步骤和所述 第二步骤， 其中， 所述预定条件指示包括以下之一： 所述基站获取到来自所述移动台的反向前缀、 所述基站预先设置的 定制器超时。
6. —种发射功率的处理装置， 位于基站， 其特征在于， 包括: 发送模块， 用于以当前发射功率在前向业务信道向移动台发送预定 数量的空帧；
功率控制模块，用于在所述发送模块发送所述预定数量的空帧之后， 增加当前发射功率；
调度模块， 用于在所述功率控制模块增加当前发射功率之后， 以增 加后的发射功率为当前发射功率调度所述发送模块。
7. 根据权利要求 6所述的装置， 其特征在于， 所述调度模块包括：
判断子模块， 用于判断所述增加后的当前发射功率是否大于所述基 站在所述前向业务信道的发射功率的上限值；
第一调度子模块，用于在所述判断子模块的判断结果为否的情况下， 以增加后的发射功率为当前发射功率调度所述发送模块。
8. 根据权利要求 7所述的装置， 其特征在于， 所述调度模块还包括：
第二调度子模块，用于在所述判断子模块的判断结果为是的情况下， 以所述上限值的发射功率为当前发射功率调度所述发送模块。
9. 根据权利要求 8所述的装置， 其特征在于， 所述调度模块还包括：
第三调度子模块， 用于以预先设置的初始发射功率调度所述发送模 块。
10. 根据权利要求 6至 9中任一项所述的装置， 其特征在于， 还包括：
停止模块， 用于在所述基站满足预定条件的情况下， 停止所述发送 模块、 所述功率控制模块和所述调度模块， 其中， 所述预定条件指示包 括以下之一： 所述基站获取到来自移动台的反向前缀、 所述基站预先设 置的定制器超时。
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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1373619A (zh) * 2001-02-28 2002-10-09 日本电气株式会社 移动通信系统、发射功率控制方法及其基站
CN1413042A (zh) * 2001-10-17 2003-04-23 株式会社Ntt都科摩 发射功率设置方法、移动通信系统和基站
CN101466140A (zh) * 2008-12-15 2009-06-24 中兴通讯股份有限公司 一种提高呼叫成功率的方法及其基站系统

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1373619A (zh) * 2001-02-28 2002-10-09 日本电气株式会社 移动通信系统、发射功率控制方法及其基站
CN1413042A (zh) * 2001-10-17 2003-04-23 株式会社Ntt都科摩 发射功率设置方法、移动通信系统和基站
CN101466140A (zh) * 2008-12-15 2009-06-24 中兴通讯股份有限公司 一种提高呼叫成功率的方法及其基站系统

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