WO2011035708A1 - 一种切换控制方法及无线通信基站 - Google Patents

一种切换控制方法及无线通信基站 Download PDF

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Publication number
WO2011035708A1
WO2011035708A1 PCT/CN2010/077172 CN2010077172W WO2011035708A1 WO 2011035708 A1 WO2011035708 A1 WO 2011035708A1 CN 2010077172 W CN2010077172 W CN 2010077172W WO 2011035708 A1 WO2011035708 A1 WO 2011035708A1
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Prior art keywords
time slot
same time
users
muros
user
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PCT/CN2010/077172
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English (en)
French (fr)
Inventor
王超
郭宏伟
高磊
栾政敏
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华为技术有限公司
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Publication of WO2011035708A1 publication Critical patent/WO2011035708A1/zh

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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W52/00Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04TPC
    • H04W52/38TPC being performed in particular situations
    • H04W52/40TPC being performed in particular situations during macro-diversity or soft handoff
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W36/00Hand-off or reselection arrangements
    • H04W36/16Performing reselection for specific purposes
    • H04W36/22Performing reselection for specific purposes for handling the traffic

Definitions

  • the present invention relates to the field of wireless communication technologies, and in particular, to a handover control method and a wireless communication base station. Background technique
  • Multi-User Reusing One Slot technology is one of them.
  • the core idea of the MUROS technology is to divide a physically existing channel, that is, a conventional channel in a cell into two or more virtual channels, which are also referred to as subchannels of the legacy channel.
  • a traditional user bearer is a channel that carries and accesses a user. Since one channel includes two or more subchannels, the MUROS technology simultaneously carries the service data of two or more users on one time slot corresponding to one channel, thereby improving the utilization of frequency resources and simultaneously increasing the entire system. Capacity.
  • MUROS users and non-MUROS users can coexist.
  • some non-MUROS users can be selected to be MUROS user pairs, and switched to MUROS working mode to reduce the occupation rate of traditional physical channels. This involves the switching of traditional non-MUROS users to the MUROS user channel.
  • the success rate of the MUROS user handover is relatively low.
  • the present invention provides a handover control method and a wireless communication base station, which can improve the handover success rate of a multiplexed time slot user.
  • the users to be switched among the at least two users multiplexed in the same time slot are switched to multiplex the same time slot channel.
  • the power difference range determining unit determines, according to the base station measurement result and the cell channel environment, a range of transmit power differences of at least two users that reuse the same time slot (MUROS);
  • a transmit power control unit configured to adjust a transmit power value of the at least two users that multiplex the same time slot, such that a transmit power difference of the at least two users multiplexed with the same time slot is determined by the power difference range determining unit Within the range of the transmit power difference;
  • a switching unit configured to switch, by using at least two users multiplexed in the same time slot, the users of the same time slot to be switched to the multiplexed same time slot channel.
  • the transmit power difference of the paired two MUROS users is within a predetermined range, and A good MUROS signal demodulation performance constraint is introduced into the multiplex switching of the MUROS user pair, thereby obtaining a higher multiplexing switching success rate of the MUROS user pair.
  • FIG. 1 is a flowchart of a handover control method for a multiplexed slot user according to an embodiment of the present invention
  • FIG. 2 is a flowchart of a handover control method for a multiplexed slot user according to an embodiment of the present invention
  • a switching control device configuration of a multiplexed time slot user provided in the embodiment of the present invention is shown Intention. detailed description
  • the success rate of the MUROS user handover will be lower.
  • a mutual constraint relationship may be introduced in the handover power of each user in the MUROS user group on the BTS side of the base station. This constraint relationship enables all users in the MUROS user group to maintain a certain power. The difference, thus ensuring a successful handover of the MUROS user.
  • MUROS technology is mainly used in user-intensive scenarios.
  • the initial access of the new service is first assigned to the non-MUROS channel according to the conventional manner, and then the most suitable user is selected by the intra-cell handover to switch to the MUROS type. channel.
  • the new service can be directly allocated to a suitable MUROS type channel.
  • the pairing algorithm generally multiplexes the user into the MUROS mode by means of intra-cell handover. Users who are multiplexed in the MUROS user group generally have to meet certain constraints in order to obtain good demodulation performance:
  • the wireless environment of the two users paired into MUROS users cannot be too different. If the user's wireless environment (such as path loss, etc.) that is paired into a MUROS user is too different, users with large path loss are prone to dropped calls, while users with small path loss are unnecessarily too large, increasing interference. .
  • the uplink power of the two users paired into the MUROS user cannot be too different, otherwise the stronger user signal received by the base station side will overwhelm the weaker user signal; Demodulation algorithms, such as Interference Rejection Combining (IRC), require a certain difference in the uplink power of two users.
  • IRC Interference Rejection Combining
  • the MUROS user pair selection and multiplexing switching is given below in the case where two users multiplex the same time slot.
  • the specific scheme for the case where two or more users multiplex the same time slot, the switching control can be performed with reference to the scheme.
  • the MUROS user's pairing selection selects users who can be multiplexed to the MUROS channel according to various constraints.
  • the main criteria are as follows:
  • SS(s) is the measured level of the serving cell (need to add power control compensation);
  • SS(n) is a neighboring cell that is removed from the shared cell with the serving cell, and the broadcast control channel (BCCH, Broadcast Control Channel) is used to measure the maximum level value in the remaining neighboring cell.
  • BCCH Broadcast Control Channel
  • the MUROS user-matched cell load threshold is the cell load threshold corresponding to the handover multiplexing
  • the user with the least path loss is selected to switch to the MUROS channel. on. This ensures that the overall performance is as good as possible.
  • the path loss calculation formula is as follows:
  • PathLossDb TRX—PWR CUR DBM - RxLevDbm
  • TRX_PWR_CUR_DBM is the transmit power of the channel currently occupied by the MS
  • RxLevDbm is the downlink signal power (Dbm) received by the MS;
  • the non-MUROS user switches to the MUROS channel to belong to the intra-cell handover, and the non-MUROS user is switched to the MUROS channel (that is, the I/Q two paths of a certain MUROS channel:).
  • the specific handover process is basically the same as the traditional handover procedure.
  • the base station controller (BSC, Base Station Center) analyzes the measurement reports of the mobile station and the base station, and after determining that it is necessary to switch to the MUROS channel, it will send a channel activation message to the base station (BTS, Base Transceiver Station), such as CHANNEL ACTIVE.
  • the message is used to initiate the process of intra-cell handover, and the connection process is similar to the connection process of the traffic channel (TCH, Traffic CHannel) at the time of call setup.
  • TCH traffic channel
  • Traffic CHannel traffic channel
  • the BTS The mobile station may be instructed to perform an intra-cell handover operation by a handover command or an assignment command.
  • the BSC After receiving the handover complete message sent by the BTS, such as HANDOVER COMPLETE, the BSC sends a handover executed message, such as a HOPERFOMED message, to the mobile service switching center (MSC), which may include the type of the handover. .
  • MSC mobile service switching center
  • the BSC will release the old TCH channel through the wireless channel release message, and after receiving the instruction, the BTS will put the old TCH resource.
  • the source is released and a confirmation message is returned.
  • the MUROS user needs to maintain a certain difference between the transmit power of each user when performing multiplexing switching.
  • a handover control method for a multiplexed slot user includes:
  • MUROS user in the embodiment of the present invention refers to a user who is paired into a MUROS user.
  • the power difference threshold is set, and the value of the power difference threshold may be obtained according to a simulation or obtained according to a field test, and the range of the transmit power difference can ensure the receiving or demodulating performance of the two MUROS users with different power differences, and the specific determining method is determined. This document is not limited.
  • the obtaining performance of the two MUROS users with different power differences is obtained according to the receiving algorithm, and the power difference corresponding to the better performance is selected as the threshold value.
  • the field test can include: In the field test, adjust the different power differences, see the receiving effect, and select the power difference when the better receiving effect is used as the threshold.
  • the transmit power of the higher power user of the two MUROS users may be adjusted to a predetermined value Pmax, which is not less than 90% of the maximum transmit power of the MUROS user;
  • Pmax which is not less than 90% of the maximum transmit power of the MUROS user
  • the maximum transmit power of the MUROS user is used.
  • the maximum transmit power of the MUROS user may be the maximum transmit power of the adjusted MUROS user.
  • the transmit power of another MUROS user is adjusted to Pmax- ⁇ , which is the value in the range of transmit power differences.
  • the MUROS user transmission power with a large path loss is adjusted to a predetermined value Pmax, and the predetermined value Pmax is not lower than 90% of the maximum transmission power of the MUROS user;
  • the transmit power of another MUROS user is adjusted to Pmax- ⁇ , which is the value in the range of transmit power differences.
  • the method of adjusting the transmit power value of the MUROS user may include: For the MUROS user that needs to be switched, the power control parameter may be carried by the handover command (or the assignment command) to the MUROS user that needs to be switched, to instruct the MUROS user to adjust the transmission power.
  • the MUROS user whose transmission power is Pmax- ⁇ can be switched to the MUROS channel first.
  • Another embodiment of the present invention may also adopt another MUROS multiplexing switching mode.
  • the network determines to multiplex two users together, one of the MUROS users currently uses the channel as the MUROS channel, and the other MUROS user from the original channel.
  • the handover access transmit power also needs to ensure that the signal power of the two users meets a certain constraint relationship at the receiving end of the base station, thereby ensuring the successful handover of the user and ensuring the network. Reception to another user is not affected. After the switch is completed, it can be adjusted according to the normal power control method.
  • the MUROS user in the embodiment of the present invention refers to a user who is paired into a MUROS user.
  • a handover control method for a multiplexed slot user including: S21, selecting to determine a channel currently used by one of the MUROS user pairs as a MUROS channel;
  • the MUROS user pair is MS1 and MS2; specifically, the channel currently used by the user MS1 can be used as the MUROS channel;
  • Adjusting the transmit power value of the MUROS user may include:
  • the transmit power of another MUROS user is adjusted to Pmax- ⁇ , which is the value in the range of transmit power differences.
  • the transmit power of the other user MS2 may adopt the maximum transmit power allowed. Transmit, the transmit power of the MSI and the transmit power of the MS2 are kept at a certain difference to ensure smooth handover.
  • adjusting the transmit power of the MUROS user may include:
  • the predetermined value Pmax is not lower than 90% of the maximum transmit power of the user who multiplexes the same time slot; The power is adjusted to Pmax-5.
  • the uplink joint power control is performed according to the measurement reports of the two users.
  • the uplink power control level threshold is lower than the uplink power control standard level threshold by one power offset value for the MUROS user who first switches to the MUROS channel; Another MUROS user who accesses later, the uplink power control level threshold still uses the configured standard level threshold.
  • the dynamic adjustment of power is based on two indicators: the signal quality part and the level part.
  • the power control step is directly determined by the value of the level portion, and the factor of the level portion is the MUROS uplink signal power level adjustment factor, and the two MUROS users respectively use their respective Calculate the obtained power control step size to adjust.
  • the quality part of the MUROS user power control step is determined by the relatively poor quality of the two users according to the obtained power control step.
  • the factor of the quality part is set to the MUROS uplink quality level adjustment factor, and the level part of the two MUROS user power control step is calculated by the two MUROS users respectively, and the final power control step size of the two MUROS users is determined by the level. Composition with the quality part.
  • the power control step can be as follows:
  • Q1 the quality part of the quality of the user 1 (ie the quality part of the power control step of the user 1); Q2: the quality part of the quality part of the user 2 (ie the quality part of the power control step of the user 2); SI : Level 1 power control step of user 1 (ie, the level part of user 1's power control step); S2: User 2's level part power control step (ie, user 2's power step size) Flat part).
  • a wireless communication base station 300 which can perform handover control on a multiplexed time slot user, including:
  • the power difference determining unit 310 determines, according to the measurement result of the base station side and the cell channel environment, a range of transmit power differences of the multiplexed MUROS users in the same time slot;
  • a transmit power control unit 320 configured to adjust a transmit power value of the MUROS user, such that a transmit power difference between the two MUROS users is within a range of the transmit power difference;
  • the switching unit 330 is configured to switch the MUROS user to be switched to the MUROS channel.
  • the transmit power control unit 320 includes:
  • the first power control module 320a is configured to adjust a transmit power of a MUROS user of the two MUROS users to a predetermined value Pmax; the predetermined value Pmax is not less than 90% of a maximum transmit power of the MUROS user; for example, a MUROS user may be used. Maximum transmit power.
  • the second power control module 320b is configured to adjust a transmit power of another MUROS user of the two MUROS users to Pmax- ⁇ , where ⁇ is a value in a range of transmit power differences.
  • the MUROS user whose transmission power is adjusted to the predetermined value Pmax may be a MUROS user with a large path loss or a MUROS user with a large transmission power.
  • the switching unit first switches the MUROS user whose transmit power is Pmax- ⁇ to the MUROS channel.
  • the wireless communication base station 300 further includes:
  • the MUROS channel determining unit 340 selects a channel currently used by one of the two MUROS users as the MUROS channel;
  • Switching unit 330 switches another MUROS user of the two MUROS users to the MUROS channel selected by MUROS channel determining unit 340.
  • the transmit power difference between the paired two MUROS users is within a predetermined range, and a good MUROS can be obtained.
  • the constraints of signal demodulation performance are introduced into the multiplex switching of the MUROS user pair, thereby obtaining a higher multiplexing switching success rate of the MUROS user pair.
  • An embodiment of the present invention provides a handover control method for a multiplexed time slot user, including: determining, according to a base station measurement result and a cell channel environment, multiplexing of at least two users in the same time slot Range of emission power differences;
  • the users multiplexed in the same time slot are switched to multiplex the same time slot MUROS channel.
  • the adjusting the transmit power value of the user multiplexed in the same time slot includes:
  • the transmission power of other users multiplexed in the same time slot is adjusted to Pmax - ⁇ , which is a value in the range of the transmission power difference.
  • the adjusting the transmit power value of the user multiplexed in the same time slot including: adjusting, according to the measurement result of the base station, a user with the same time slot with a large path loss or a transmit power of a user with a large transmit power to a predetermined value.
  • Pmax the predetermined value Pmax is not lower than 90% of the maximum transmission power of the user who multiplexes the same time slot;
  • the other household transmit power of another user multiplexed in the same time slot is adjusted to Pmax - ⁇ , which is a value in the range of the transmit power difference.
  • the user who multiplexes the same time slot with the transmit power of Pmax- ⁇ first switches to the MUROS channel.
  • the switching the user that multiplexes the same time slot to the MUROS channel includes:
  • the channel currently used by the user who multiplexes the same time slot is used as the MUROS channel; and other users multiplexed with the same time slot are switched to the MUROS channel.
  • a handover command or a assignment command carrying a power control parameter is sent to a user who needs to switch to multiplex the same time slot.
  • An embodiment of the present invention provides a wireless communication base station, including:
  • the power difference range determining unit determines, according to the base station side measurement result and the cell channel environment, a range of transmit power differences of at least two users that are multiplexed in the same time slot;
  • a transmit power control unit configured to adjust a transmit power value of the user that multiplexes the same time slot, such that a transmit power difference of the user multiplexed with the same time slot is within a range of the transmit power difference
  • the transmit power control unit includes:
  • a first power control module configured to adjust a transmit power of a user multiplexed in the same time slot to a predetermined value Pmax, the predetermined value Pmax being not lower than 90% of a maximum transmit power of a user multiplexing the same time slot;
  • a second power control module configured to adjust transmit power of other users multiplexed in the same time slot to Pmax- ⁇ , where ⁇ is a value in a range of transmit power differences.
  • the user who multiplexes the same time slot with the transmission power adjusted to the predetermined value Pmax is a user who multiplexes the same time slot with a large path loss or a user who multiplexes the same time slot with a large transmission power.
  • the switching unit first switches the user who multiplexes the same time slot with the transmission power Pmax- ⁇ to the MUROS channel.
  • the wireless communication base station further includes:
  • a MUROS channel determining unit configured to multiplex a channel currently used by a user in the same time slot as a MUROS channel
  • the switching unit switches other users multiplexed in the same time slot to the MUROS channel.
  • various units or steps of the present invention described above can be implemented by a general-purpose computing device that can be centralized on a single computing device or distributed across a network of multiple computing devices. Alternatively, 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 units or steps are made in a single integrated circuit module. Thus, the invention is not limited to any particular combination of hardware and software.

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

Description

一种切换控制方法 5UL线通信基站 本申请要求了 2009年 9月 25 日提交的, 申请号为 200910196816.5, 发 明名称为"一种复用时隙用户的切换控制方法及无线通信基站"的中国专利申 请的优先权, 其全部内容通过引用结合在本申请中。 技术领域
本发明涉及无线通信技术领域, 具体涉及一种切换控制方法及无线通信 基站。 背景技术
近年来, 随着人们对移动语音业务需求的增加, 全球移动通信系统 ( GSM,Global System of Mobile communication ) 网络也在不断的扩张, 移动 无线资源越来越紧张。 随之, 出现了许多提高频谱利用效率的技术, 多用户 复用一个时隙 ( MUROS, Multi-User Reusing One Slot )技术是其中之一。 MUROS技术的核心思想是: 将物理上存在的一个信道, 即小区内的一个传统 信道划分成两个或多个虚拟信道,多个虚拟信道也称为该传统信道的子信道。 传统的用户承载是一个信道承载并接入一个用户。 由于一个信道包括两个或 多个子信道, MUROS技术就是在一个信道所对应的一个时隙上同时承载两 个或多个用户的业务数据, 从而提高频率资源的利用率, 并同时增加了整个 系统的容量。
在 GSM系统中, MUROS用户和非 MUROS用户可共存。 当网络中用户量 增多时, 可以选择一些非 MUROS用户使之配成 MUROS用户对, 切换成 MUROS工作方式, 来减少传统物理信道的占有率。 此时就涉及到传统非 MUROS用户到 MUROS用户信道的切换。
按照传统的切换接入方式, 即采用系统所允许的最大功率发起切换, 将 导致 MUROS用户切换的成功率比较低。
采用 MUROS技术时, 由于在同一时隙同时承载两个或多个用户的业务 数据, 势必会增加同一时隙用户之间的干扰强度, 造成信号质量下降, 甚至 信号中断。 因此, MUROS用户配对成功后, 在 MUROS信道上首发帧的成 功率会受到影响, 若基站侧不能成功解调两 MUROS用户的信息导致切换失 败。 由此可见, 非 MUROS用户到 MUROS信道的切换过程对网络的稳定性 有很重要的影响。 如何采取有效措施确保用户顺利切换到 MUROS信道是需 要解决的问题。 发明内容
有鉴于此, 本发明提供一种切换控制方法及无线通信基站, 可提高复用 时隙用户的切换成功率。
本发明实施例提供的一种切换控制方法, 包括:
根据基站测量结果及小区信道环境确定至少两复用同一时隙 (MUROS ) 的用户的发射功率差范围;
调整所述至少两复用同一时隙的用户的发射功率值, 使得所述至少两复 用同一时隙的用户的发射功率差在所述发射功率差范围内;
将所述至少两复用同一时隙的用户中待切换的用户切换到复用同一时隙 信道。
本发明实施例提供的一种无线通信基站, 包括:
功率差范围确定单元, 根据基站测量结果及小区信道环境确定至少两复 用同一时隙 (MUROS ) 的用户的发射功率差范围;
发射功率控制单元, 用于调整所述至少两复用同一时隙的用户的发射功 率值, 使得所述至少两复用同一时隙的用户的发射功率差在所述功率差范围 确定单元确定的所述发射功率差范围内;
切换单元, 用于将至少两复用同一时隙的用户中待切换的复用同一时隙 的用户切换到复用同一时隙信道上。
综上所述, 本发明实施例提供的技术方案中, 通过调整复用同一时隙 MUROS用户切换过程中的发射功率值, 使得配对的两 MUROS用户的发射 功率差在预定范围内, 将能得到良好的 MUROS信号解调性能的约束条件引 入 MUROS用户对的复用切换中, 从而得到较高的 MUROS用户对的复用切 换成功率。 附图说明
图 1为本发明实施例提供的一种复用时隙用户的切换控制方法流程图; 图 2为本发明实施例提供的一种复用时隙用户的切换控制方法流程图; 图 3为本发明实施例中提供的一种复用时隙用户的切换控制装置构成示 意图。 具体实施方式
对于复用同一时隙 MUROS用户若按照传统的方式切换到 MUROS信道, 将导致 MUROS用户切换的成功率比较低。为了提高 MUROS用户切换成功率, 可以在基站 BTS侧对 MUROS用户组中每个用户的切换功率中引入一种相互 制约关系,这种制约关系可以使得 MUROS用户组中的所有用户能够保持一定 的功率差值, 从而确保 MUROS用户的成功切换。
为了便于理解本发明, 下面先对 MUROS配对过程进行描述。
MUROS技术主要应用于用户密集的场景。
当业务信道资源池中存在空闲的非 MUROS类型业务信道时, 有新业务 初始接入先按照传统的方式为其分配非 MUROS信道, 后续将通过小区内切 换选出最适合的用户切换至 MUROS类型信道。 当在原业务信道资源池中已 不存在空闲的非 MUROS类型业务信道, 而存在空闲的 MUROS类型业务信 道时, 可以将该新业务直接分配到一个合适的 MUROS类型信道上。
把非 MUROS用户复用成 MUROS用户可以有一定的原则和限制, 比如, 只有处于小区中心区域( Clean Zone ) 的用户可配对复用成 MUROS模式, 而 对于小区边缘区域( Interference Zone ) 的用户不考虑进入 MUROS模式。
配对算法一般是通过小区内切换( Intra-cell Handover ) 的方式将用户复 用成 MUROS模式。 MUROS用户组中复用的用户为了得到良好的解调性能一 般要满足一定的约束条件:
在下行, 两个配对成 MUROS用户的用户无线环境不能相差太大。 若两 个配对成 MUROS用户的用户无线环境(如路损等)相差太大, 则其中路损 大的用户容易发生掉话, 而路损小的用户的功率不必要地过大, 增加了干扰。 在上行, 若要 MUROS用户顺利完成切换, 两个配对成 MUROS用户的 用户上行功率不能相差太大, 否则基站侧接收到的较强的用户信号会淹没较 弱的用户信号; 另一方面, 上行解调算法,如干扰抑制算法(IRC, Interference Rejection Combining等)要求两个用户的上行功率有一定的差值。
在进行 MUROS用户组合(配对) 时通常只考虑下行的约束条件, 而在 复用切换过程中, 需要考虑组合(配对 ) 的 MUROS用户之间的发射功率。
下面以两用户复用同一时隙的情况给出 MUROS用户对选择和复用切换 的具体方案, 对于两个以上用户复用同一时隙的情况, 可参照该方案进行切 换控制。
MUROS用户的配对选择,根据各种约束条件来选择能够复用到 MUROS 信道的用户, 主要可以有如下准则:
SS(s)-SS(n)< 参数配置的 MUROS用户配对门限。
SS(s)为服务小区测量电平值(需要加上功控补偿);
SS(n)为除去与服务小区共站点的邻区, 在余下的邻区中广播控制信道 ( BCCH, Broadcast Control Channel ) 测量最大的电平值。
MUROS用户对配成以后, 可以启动切换复用的判决和操作:
首先, 判决小区负荷是否超过 MUROS用户配对小区负荷门限(其中, MUROS用户配对小区负荷门限即启动切换复用对应的小区负荷门限), 如果 是, 挑选一组路损最小的用户对切换到 MUROS信道上。 这样能保证综合的 性能尽可能优。
路径损耗计算公式如下:
PathLossDb = TRX—PWR CUR DBM - RxLevDbm
其中, TRX_PWR_CUR_DBM为 MS当前占用信道的发射功率;
RxLevDbm为 MS接收到的下行信号功率 (Dbm);
非 MUROS用户切换到 MUROS信道属于小区内的切换, 将非 MUROS 用户切换到 MUROS信道 (即某一个 MUROS信道的 I/Q两路:),具体的切换过 程与传统的切换过程基本相同, 通话过程中,基站控制器(BSC, Base Station Center)分析移动台和基站的测量报告, 通过判决发现有必要切换到 MUROS 信道后, 将向基站 ( BTS , Base Transceiver Station )发送信道激活消息, 如 CHANNEL ACTIVE消息, 来启动小区内部切换的进程, 其接续过程与呼叫 建立时业务信道(TCH,Traffic CHannel )接续过程类似, 由于是在该小区内 部来分配 TCH资源(即新的 TCH信道资源), BTS既可以通过切换命令也可 以采用指派命令指示移动台执行小区内切换操作。 当 BSC收到 BTS发送过 来的切换完成消息如 HANDOVER COMPLETE后, 将向移动业务交换中心 ( MSC , Mobile Services switching Center ) 发送出切换已执行消息, 如 HOPERFOMED消息, 该消息中可以含有该切换的类型。 此后, BSC将通过 无线信道释放消息将旧 TCH信道释放, BTS收到该指令后, 将把旧 TCH资 源释放, 并返回确认消息。
MUROS 用户对在进行复用切换时, 每个用户的发射功率之间需保持一 定的差值。
实施例一
参照图 1, 本实施例提供的一种复用时隙用户的切换控制方法, 包括:
511 , 根据基站侧测量结果及小区信道环境确定复用同一时隙 MUROS 的两用户的发射功率差范围; 复用同一时隙 MUROS 的用户可以简称为 MUROS用户。 本发明实施例中的 MUROS用户指的是配对成 MUROS用户 的用户。
设定功率差门限为 , 该功率差门限 的值, 可以根据仿真得到, 或者根 据实地测试得到, 该发射功率差范围可以保证两 MUROS用户不同的功率差 下的接收或解调性能, 具体确定方法在本申请中不做限定。
根据仿真得到可以包括: 根据接收算法获得两 MUROS用户不同的功率 差下的接收性能, 选取较好性能对应的功率差作为门限值。
实地测试得到可以包括: 在外场测试时, 调整不同的功率差, 看接收效 果, 选取较好接收效果时的功率差作为门限值。
512 ,调整 MUROS用户的发射功率值,使得两 MUROS用户的发射功率 差在所述发射功率差范围内;
调整 MUROS用户的发射功率值过程中, 可将所述两 MUROS用户中功 率较高的用户发射功率调整到预定值 Pmax, 该预定值 Pmax不低于 MUROS 用户的最大发射功率的 90%; 也可采用 MUROS用户的最大发射功率。 在本 发明实施例中, MUROS用户的最大发射功率可以为被调整的 MUROS用户 的最大发射功率。
将另一 MUROS用户的发射功率调整为 Pmax-δ, δ为发射功率差范围中 的值。 或者,
根据基站测量结果, 将路损较大的 MUROS用户发射功率调整到预定值 Pmax, 该预定值 Pmax不低于 MUROS用户的最大发射功率的 90%;
将另一 MUROS用户的发射功率调整为 Pmax-δ, δ为发射功率差范围中 的值。
调整 MUROS用户的发射功率值的方法可以包括: 对于需要切换的 MUROS用户, 可以通过切换命令(或指派命令)携带 功率控制参数发送给该需要切换的 MUROS用户, 以指示所述 MUROS用户 调整发射功率。
S13 , 将所述 MUROS用户切换到 MUROS信道。
为了平稳地完成切换,可将发射功率为 Pmax-δ的 MUROS用户先切换到 MUROS信道。
实施例二
本发明另一实施例还可采用另外一种 MUROS复用切换方式, 当网络确 定将两个用户复用在一起时, 其中一个 MUROS 用户当前使用的信道作为 MUROS信道, 另外一个 MUROS用户从原信道上切换到该 MUROS信道上, 对于进行信道切换的用户, 其切换接入发射功率也要在基站接收端使两个用 户的信号功率满足一定的约束关系, 既保证用户的切换成功, 又保证网络对 另一个用户的接收不受影响。 切换完成后可以再按照正常的功控方法进行调 整。 本发明实施例中的 MUROS用户指的是配对成 MUROS用户的用户。
参照图 2, 本实施例提供的一种复用时隙用户的切换控制方法, 包括: S21, 选择确定 MUROS 用户对中之一用户当前所用信道作为 MUROS 信道;。
比如, MUROS用户对为 MS1和 MS2; 具体可将用户 MS1当前所用信 道作为 MUROS信道;
S22 ,调整 MUROS用户的发射功率值,使得两 MUROS用户的发射功率 差在确定的发射功率差范围内;
调整 MUROS用户的发射功率值, 可以包括:
将 MUROS用户对中功率较高的用户发射功率调整到预定功率值 Pmax, 该预定值 Pmax不低于 MUROS用户的最大发射功率的 90%;
将另一 MUROS用户的发射功率调整为 Pmax-δ, δ为发射功率差范围中 的值。
可以理解的是, 若其中一个 MUROS用户的发射功率值已经满足要求, 则可以仅调整不满足要求的 MUROS用户的发射功率值。
S23, 将 MUROS用户中的另一用户切换到所述 MUROS信道; 在切换过程中,该另一用户 MS2的发射功率可采用允许的最大发射功率 发射, MSI的发射功率与 MS2的发射功率保持一定的差值, 以保证切换顺利 进行。
发射功率在本发明实施例中, 对 MUROS用户的发射功率进行调整, 可 以包括:
将其中一 MUROS用户的发射功率调整到预定功率值 Pmax, 该预定值 Pmax不低于复用同一时隙用户的最大发射功率的 90%;
将另一 MUROS用户的户发射功率调整为 Pmax-5。
或者, 根据基站测量结果, 将路损较大的 MUROS用户发射功率调整到 Pmax, 该预定值 Pmax不低于复用同一时隙用户的最大发射功率的 90%; 将另一 MUROS用户的户发射功率调整为 Pmax-5。
复用切换完成以后, 根据两用户的测量报告进行上行联合功控。
为了保证在切换至 MUROS信道后 MUROS两用户的上行接收功率偏差, 对于先切换至 MUROS信道上的 MUROS用户, 其上行功控电平门限要比上行 功控标准电平门限低一个功率偏差值; 后接入的另一 MUROS用户, 其上行功 控电平门限仍使用配置的标准电平门限。
功率的动态调整基于两个指标: 信号质量部分和电平部分。
MUROS用户的载干比大于等于 MUROS上行质量门限, 则功控步长直接 由电平部分的值来确定,电平部分的因子取值为 MUROS上行信号功率等级调 整因子, 两 MUROS用户分别使用各自计算得到的功控步长来调整。
MUROS用户中任何一个用户的载干比小于 MUROS上行质量门限值, 则 MUROS用户功控步长的质量部分由两用户中质量相对较差的用户根据其得 到的功控步长来确定,此时质量部分的因子设定为 MUROS上行质量等级调整 因子, 而两 MUROS用户功控步长的电平部分则由两 MUROS用户分别计算后 得出, 两 MUROS用户的最终功控步长由电平与质量部分组成。
其中, 功控步长可以如下:
用户 1调整功控步长 Step = -( Sl + min(Ql, Q2))
用户 2调整功控步长 Step = -( S2 + min(Ql, Q2))
其中,
Q1 : 用户 1的质量部分功控步长(即用户 1的功控步长的质量部分); Q2: 用户 2的质量部分功控步长(即用户 2的功控步长的质量部分); SI : 用户 1的电平部分功控步长(即用户 1的功控步长的电平部分); S2: 用户 2的电平部分功控步长(即用户 2的功控步长的电平部分)。 参照图 3, 本发明另一实施例还提供一种无线通信基站 300, 可对复用时 隙用户进行切换控制, 包括:
功率差确定单元 310, 根据基站侧测量结果及小区信道环境确定两复用 同一时隙 MUROS用户的发射功率差范围;
发射功率控制单元 320, 用于调整所述 MUROS用户的发射功率值, 使 得所述两 MUROS用户的发射功率差在所述发射功率差范围内;
切换单元 330, 用于将待切换的 MUROS用户切换到 MUROS信道。 发射功率控制单元 320包括:
第一功率控制模块 320a, 用于将两 MUROS用户中的一 MUROS用户的 发射功率调整到预定值 Pmax; 该预定值 Pmax不低于 MUROS用户的最大发 射功率的 90%; 比如可采用 MUROS用户的最大发射功率。
第二功率控制模块 320b, 用于将两 MUROS用户中的另一 MUROS用户 的发射功率调整为 Pmax-δ, δ为发射功率差范围中的值。
所述发射功率调整到预定值 Pmax 的 MUROS 用户可以为路损较大的 MUROS用户或发射功率较大的 MUROS用户。
所述切换单元将所述发射功率为 Pmax-δ 的 MUROS 用户先切换到 MUROS信道。
该无线通信基站 300, 还包括:
MUROS信道确定单元 340,选择两 MUROS用户中的一 MUROS用户当 前所用信道作为 MUROS信道;
切换单元 330将两 MUROS用户中的另一 MUROS用户切换到 MUROS信 道确定单元 340选择的 MUROS信道。
综上所述, 本发明实施例提供的技术方案中, 通过调整所述 MUROS用 户切换过程中的发射功率值,使得配对的两 MUROS用户的发射功率差在预定 范围内, 将能得到良好的 MUROS信号解调性能的约束条件引入 MUROS用户 对的复用切换中, 从而得到较高的 MUROS用户对的复用切换成功率。
本发明实施例提供一种复用时隙用户的切换控制方法, 包括: 根据基站测量结果及小区信道环境确定复用同一时隙的至少两用户的发 射功率差范围;
调整所述复用同一时隙的用户的发射功率值, 使得所述复用同一时隙的 用户的发射功率差在所述发射功率差范围内;
将所述复用同一时隙的用户切换到复用同一时隙 MUROS信道。
其中, 所述调整复用同一时隙的用户的发射功率值, 包括:
将复用同一时隙的一用户的发射功率调整到预定值 Pmax, 该预定值 Pmax不低于复用同一时隙用户的最大发射功率的 90%;
将复用同一时隙的其他用户的发射功率调整为 Pmax- δ, δ为发射功率 差范围中的值。
或者, 所述调整复用同一时隙的用户的发射功率值, 包括: 根据基站测 量结果, 将路损较大的复用同一时隙的用户或发射功率较大的用户发射功率 调整到预定值 Pmax,该预定值 Pmax不低于复用同一时隙用户的最大发射功率 的 90%;
将另一复用同一时隙的其他用户的户发射功率调整为 Pmax- δ, δ为发 射功率差范围中的值。
其中, 将所述发射功率为 Pmax- δ的复用同一时隙的用户先切换到 MUROS信道。
所述将复用同一时隙的用户切换到 MUROS信道, 具体包括:
以其中之一复用同一时隙的用户当前所用信道作为 MUROS信道; 将复用同一时隙的其他用户切换到所述 MUROS信道。
所述调整所述复用同一时隙的用户的发射功率值, 包括:
发送携带功率控制参数的切换命令或指派命令给需要切换的复用同一时 隙的用户。
本发明实施例提供一种无线通信基站, 包括:
功率差范围确定单元, 根据基站侧测量结果及小区信道环境确定复用同 一时隙的至少两用户的发射功率差范围;
发射功率控制单元, 用于调整所述复用同一时隙的用户的发射功率值, 使得所述复用同一时隙的用户的发射功率差在所述发射功率差范围内;
切换单元, 用于将所述复用同一时隙的用户切换到复用同一时隙 MUROS信道。 其中, 所述发射功率控制单元包括:
第一功率控制模块, 用于将复用同一时隙的一用户的发射功率调整到预 定值 Pmax, 该预定值 Pmax不低于复用同一时隙的用户的最大发射功率的 90%;
第二功率控制模块, 用于将复用同一时隙的其他用户的发射功率调整为 Pmax- δ , δ为发射功率差范围中的值。
其中,所述发射功率调整到预定值 Pmax的复用同一时隙的用户为路损较 大的复用同一时隙的用户或发射功率较大的复用同一时隙的用户。
所述切换单元将所述发射功率为 Pmax- δ的复用同一时隙的用户先切换 到 MUROS信道。
该无线通信基站还包括:
MUROS信道确定单元, 选择复用同一时隙的一用户当前所用信道作为 MUROS信道;
所述切换单元将复用同一时隙的其他用户切换到所述 MUROS信道。 显然, 本领域的技术人员应该明白, 上述的本发明的各单元或各步骤可 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单元或步骤制 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较佳实施例而已, 并非用于限定本发明的保护范 围。 凡在本发明的精神和原则之内所作的任何修改、 等同替换、 改进等, 均 包含在本发明的保护范围内。

Claims

权利 要 求
1、 一种切换控制方法, 其特征在于, 包括:
根据基站测量结果及小区信道环境确定至少两复用同一时隙 ( MUROS ) 的用户的发射功率差范围;
调整所述至少两复用同一时隙的用户的发射功率值, 使得所述至少两复 用同一时隙的用户的发射功率差在所述发射功率差范围内;
将所述至少两复用同一时隙的用户中待切换的用户切换到复用同一时隙 信道。
2、 如权利要求 1所述的切换控制方法, 其特征在于, 调整所述至少两复 用同一时隙的用户的发射功率值, 包括:
将所述至少两复用同一时隙的用户中的一用户的发射功率调整到预定值 Pmax, 该预定值 Pmax不低于复用同一时隙用户的最大发射功率的 90%; 将所述至少两复用同一时隙用户中的另一用户的发射功率调整为 Pmax-δ, δ为发射功率差范围中的值。
3、 如权利要求 1所述的切换控制方法, 其特征在于, 调整所述至少两复 用同一时隙的用户的发射功率值, 包括:
根据基站测量结果, 将所述至少两复用同一时隙的用户中的路径损耗较 大的一用户或发射功率较大的一用户的发射功率调整到预定值 Pmax,该预定 值 Pmax不低于复用同一时隙用户的最大发射功率的 90%;
将所述至少两复用同一时隙的用户中的另一用户的户发射功率调整为 Pmax-δ, δ为发射功率差范围中的值。
4、 如权利要求 2或 3所述的切换控制方法, 其特征在于, 将所述至少两 复用同一时隙的用户中待切换的用户切换到复用同一时隙信道包括:
将发射功率为 Pmax-δ的复用同一时隙的用户先切换到 MUROS信道。
5、 如权利要求 1至 4任意一项所述的切换控制方法, 其特征在于, 将所 述至少两复用同一时隙的用户中待切换的用户切换到复用同一时隙信道, 包 括:
以至少两复用同一时隙的用户中的一复用同一时隙的用户当前所用信道 作为 MUROS信道;
将至少两复用同一时隙的用户中的其他用户切换到所述 MUROS信道。
6、 如权利要求 1至 5任意一项所述的切换控制方法, 其特征在于, 调整 所述至少两复用同一时隙的用户的发射功率值, 包括:
发送携带功率控制参数的切换命令或指派命令给待切换的复用同一时隙 的用户。
7、 一种无线通信基站, 其特征在于, 包括:
功率差范围确定单元, 根据基站测量结果及小区信道环境确定至少两复 用同一时隙 (MUROS ) 的用户的发射功率差范围;
发射功率控制单元, 用于调整所述至少两复用同一时隙的用户的发射功 率值, 使得所述至少两复用同一时隙的用户的发射功率差在所述功率差范围 确定单元确定的所述发射功率差范围内;
切换单元, 用于将至少两复用同一时隙的用户中待切换的复用同一时隙 的用户切换到复用同一时隙信道上。
8、 如权利要求 7所述的无线通信基站, 其特征在于, 所述发射功率控制 单元包括:
第一功率控制模块, 用于将至少两复用同一时隙的用户中的一用户的发 射功率调整到预定值 Pmax, 该预定值 Pmax不低于复用同一时隙的用户的最 大发射功率的 90%;
第二功率控制模块, 用于至少两复用同一时隙的用户中的另一用户的发 射功率调整为 Pmax-δ, δ为发射功率差范围中的值。
9、 如权利要求 8所述的无线通信基站, 其特征在于,
所述发射功率调整到预定值 Pmax的复用同一时隙的用户为路径损耗较 大的复用同一时隙的用户或发射功率较大的复用同一时隙的用户。
10、 如权利要求 8或 9所述的无线通信基站, 其特征在于,
所述切换单元还用于将发射功率为 Pmax-δ 的复用同一时隙的用户先切 换到 MUROS信道。
11、 如权利要求 7至 10任意一项所述的无线通信基站, 其特征在于, 还 包括:
MUROS信道确定单元, 用于选择至少两复用同一时隙的用户中的一用 户当前所用信道作为 MUROS信道; 所述切换单元还用于将至少两复用同一时隙的用户中的其他用户切换 , MUROS信道确定单元确定的 MUROS信道上。
PCT/CN2010/077172 2009-09-25 2010-09-21 一种切换控制方法及无线通信基站 WO2011035708A1 (zh)

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WO2009096840A1 (en) * 2008-01-30 2009-08-06 Telefonaktiebolaget L M Ericsson (Publ) A method of power control
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