WO2011035621A1 - 一种接入等级控制方法及系统 - Google Patents

一种接入等级控制方法及系统 Download PDF

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Publication number
WO2011035621A1
WO2011035621A1 PCT/CN2010/074494 CN2010074494W WO2011035621A1 WO 2011035621 A1 WO2011035621 A1 WO 2011035621A1 CN 2010074494 W CN2010074494 W CN 2010074494W WO 2011035621 A1 WO2011035621 A1 WO 2011035621A1
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Prior art keywords
access
terminal
parameter
power adjustment
initial power
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PCT/CN2010/074494
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English (en)
French (fr)
Inventor
赵会英
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中兴通讯股份有限公司
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Publication of WO2011035621A1 publication Critical patent/WO2011035621A1/zh

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Classifications

    • 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
    • H04W52/50TPC being performed in particular situations at the moment of starting communication in a multiple access environment
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W28/00Network traffic management; Network resource management
    • H04W28/16Central resource management; Negotiation of resources or communication parameters, e.g. negotiating bandwidth or QoS [Quality of Service]
    • H04W28/18Negotiating wireless communication parameters
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W48/00Access restriction; Network selection; Access point selection
    • H04W48/08Access restriction or access information delivery, e.g. discovery data delivery
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W52/00Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04TPC
    • H04W52/18TPC being performed according to specific parameters
    • H04W52/28TPC being performed according to specific parameters using user profile, e.g. mobile speed, priority or network state, e.g. standby, idle or non transmission
    • H04W52/281TPC being performed according to specific parameters using user profile, e.g. mobile speed, priority or network state, e.g. standby, idle or non transmission taking into account user or data type priority
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W74/00Wireless channel access

Definitions

  • the present invention relates to a wireless communication system access technology, and in particular, to an access level control method and system. Background technique
  • the terminal before establishing a service connection between a terminal and a system, the terminal first transmits information necessary for establishing a service connection on a common channel (i.e., an access channel) to apply for a communication channel.
  • a common channel i.e., an access channel
  • the terminal sends a series of access probes for access attempts.
  • Each access probe includes a prefix part and a data part, where the data part is one or more physical layer packet data packets.
  • the prefix portion of the access probe corresponds to a pilot channel of the access channel, and the data portion corresponds to a pilot channel and a data channel of the access channel.
  • FIG. 1 is a schematic diagram of an access probe structure of an access channel. As shown in FIG.
  • each access probe includes a prefix and one or more physical layer packet data packets, and the terminal starts to send at the beginning of the access channel period duration.
  • the pilot I-channel
  • the probe data Q-channel
  • FIG. 2 is a timing diagram of the transmission of the access probe sequence. As shown in FIG. 2, each time the access procedure, the terminal needs to send a series of access probe sequences, and each access probe sequence sends a ProbeNumStep (parameter of the AccessParameters message). Access probes. Each heuristic in the access probe sequence is sent with increasing power until either of the following conditions are met:
  • the access terminal receives an ACAck message
  • ProbeNumStep is a parameter carried in the AccessParameters message.
  • the access terminal performs a continuity check for controlling access channel congestion before sending the first probe. In addition, the access terminal performs persistent detection between the probe sequences.
  • the power Pi of the i th access probe in the transmit access probe sequence is calculated according to formula (1):
  • X0 represents the average open-loop output power of the pilot channel of the access terminal, and the calculation method is as shown in formula (2):
  • the AccessParameters message is a public message broadcast by the system to each cell for transmitting information of the access channel to the access terminal under the cell.
  • the structure of the AccessParameters message is as shown in Table 1:
  • NACMPAPersist is a constant of the access channel MAC protocol defined in the CS0024 standard.
  • the transmit power is related to the power of the access channel pilot channel, and the power of the data channel has a certain increment relative to the power of the pilot channel, and the power of the different transmit rate data channel relative to the pilot channel Different, Table 2 shows the specific values of the power relative and pilot channel power of the data channel:
  • DataOffsetNom, DataOffset9k6, DataOffsetl9k2 and DataOffset38k4 are public data of the access channel MAC protocol, which are defined in the power parameter attribute in the access channel MAC layer protocol configuration message.
  • the base station sends an ACAck message to the terminal to notify the terminal to stop the transmission of the access probe sequence. Therefore, if the terminal is successfully demodulated by the base station every time the terminal sends a probe, the access time is the shortest, and the chance of collision with other terminal access can also be reduced, that is, the user access to the probe transmission power can be accelerated to accelerate the user.
  • Access however, in existing systems such as HRPD, all users in the same cell use the same set of parameters for access channel power parameters. Therefore, when the terminal accesses, it has a greater chance of collision with other terminals, affecting the access speed. Moreover, for a self-interference system such as CDMA, when each user transmits an access probe with a higher power, a large interference between users is caused, thereby affecting the access success rate.
  • the main object of the present invention is to provide an access level control method and system, which can improve access speed and improve user experience.
  • An access level control method in which a base station adds a parameter related to an initial power adjustment of an access probe in an access parameter message, where the method includes:
  • the terminal selects the corresponding access probe initial power adjustment parameter ProfileBasedProbelnitialAdj ust in the access parameter message according to its own level and the type of service to be initiated;
  • the terminal calculates the transmit power of the access probe according to the selected access probe initial power adjustment parameter, and sends an access probe according to the calculated transmit power.
  • the parameters related to the initial power adjustment of the access probe include: ATClassNum,
  • the method further includes the step of: the base station broadcasting, in each cell, the access parameter message carrying a parameter related to the initial power adjustment of the access probe.
  • the method further includes the following steps: the terminal performs session negotiation with the base station, determines a service type list that the terminal and the base station can support, and negotiates the level of the terminal by the base station, and then negotiates Configure the message notification terminal.
  • the terminal selects the corresponding access probe initial power adjustment parameter in the access parameter message according to the level of the service and the type of the service to be initiated, the terminal finds the access parameter message according to its own level and the service type to be initiated.
  • the default parameter ProbelnitialAdjust is used to calculate the transmission power of the access probe.
  • An access level control system including a base station and a terminal
  • the base station is configured to add, in the access parameter message, a device related to the initial power adjustment of the access probe;
  • the terminal is configured to select a corresponding access probe initial power adjustment parameter ProfileBasedProbelnitialAdjust in the access parameter message according to the level of the service and the type of the service to be initiated, and calculate the access according to the selected access probe initial power adjustment parameter.
  • the detected transmit power is transmitted, and the access probe is transmitted according to the calculated transmit power.
  • the parameters related to the access probe initial power adjustment added by the base station in the access parameter message include: ATClassNum, ATClassId, NumProfiles, Profileld, and ProfileBasedProbelnitialAdjust.
  • the base station is further configured to broadcast, in each cell, an access parameter message carrying a parameter related to access probe initial power adjustment.
  • the terminal is further configured to perform session negotiation with the base station to determine a service type list that can be supported by the terminal and the base station;
  • the base station is further configured to perform session negotiation with the terminal to determine a service type list that can be supported by the terminal and the base station; and after determining the level of the terminal, notify the terminal by using a negotiation configuration message.
  • the terminal is further configured to calculate a transmit power of the access probe by using a default parameter ProbelnitialAdjust when the corresponding access probe initial power adjustment parameter is not found in the access parameter message according to the level of the service and the type of the service to be initiated. .
  • the access level control method and system of the present invention by modifying the content of the AccessParameters message, causes the AccessParameters message to include parameters related to the initial power adjustment of the access probe, so that when the terminal accesses, it can select different according to its level and service type.
  • the probe initial power adjustment parameters are accessed to determine the transmit power of the access probe.
  • the present invention is capable of transmitting access probes to users with higher priority and services requiring higher delay with relatively higher power, thereby improving access of users with higher priority and services requiring higher delay. At the same time, the collision opportunity of the user with low priority and the service access with low delay requirement can be reduced to some extent. Therefore, the present invention can improve the success rate of the terminal access and improve the access speed.
  • FIG. 1 is a schematic diagram of an access probe structure of an access channel
  • 2 is a timing diagram of transmission of an access probe sequence
  • FIG. 3 is a schematic flowchart of an access level control method according to the present invention. detailed description
  • the AccessParameters message includes parameters related to the initial power adjustment of the access probe, so that when the terminal accesses, it can select different access probes according to its level and service type.
  • the initial power adjustment parameters are used to determine the transmit power of the access probe.
  • FIG. 3 is a schematic flowchart of an access level control method according to the present invention. As shown in FIG. 1, the access level control method of the present invention generally includes the following steps:
  • Step 301 The base station broadcasts an AccessParameters message in each cell.
  • the base station generally broadcasts an AccessParameters message in each cell through a forward common channel (control channel), and the AccessParameters message includes access tentative initial power adjustment parameters (ProfileBasedProbelnitialAdjust) corresponding to different levels of users and different service types.
  • ProfileBasedProbelnitialAdjust access tentative initial power adjustment parameters
  • AccessParameters message structure is as shown in Table 3:
  • ATClassNum indicates the number of user levels, which can be divided into four levels according to the priority level. For example: ATClassId 0 indicates the highest level user, and ATClassId 3 indicates the lowest level user.
  • the parameters related to the initial power adjustment of the access probe in Table 3 include: ATClassNum, AT class number (ATClassId), number of application types (NumProfiles), application type number (Profileld), and ProfileBasedProbelnitialAdjust, where ProfileBasedProbelnitialAdjust is the user level and The initial power adjustment of the access probe corresponding to the service type.
  • ATClassId corresponds to the NumProfiles Profileld domain and the ProfileBasedProbelnitialAdjust domain.
  • the unique ProfileBasedProbelnitialAdjust parameter can be found for the (ATClsssId, Profileld) pair. Therefore, in fact, the Profileld domain and the ProfileBasedProbelnitialAdjust domain must have ATClassNum X in total. NumProfiles times.
  • Profileld The corresponding service type is defined in the Administration of Parameter Value Assignments for cdma2000 Spread Spectrum Standards standard.
  • Profileld 256 corresponds to the VoIP service type.
  • ProfileBasedProbelnitialAdjust is generally set to a relatively large value for high-priority users and high-priority service types.
  • ATClassId 0 has a larger value than ProfileBasedProbelnitialAdjust corresponding to various service types of ATClassId 1.
  • the value of ProfileBasedProbelnitialAdjust for VoIP, VT, Web browsing and FTP application service types can be reduced in turn.
  • Step 302 The terminal performs session (Session) negotiation with the base station.
  • the terminal When the terminal negotiates with the base station, it mainly determines the list of service types (Profileld) that the terminal and the base station can support. In addition, after determining the level of the terminal (ATClass), the base station notifies the terminal through the negotiation configuration message.
  • Profile list of service types
  • ATClass level of the terminal
  • the level of the terminal is generally defined by the network operator according to the actual situation, and is uniformly maintained.
  • Step 303 The terminal determines a service type ProfileId that needs to send an access request.
  • Step 304 The terminal selects an initial access probe initial power adjustment parameter in the AccessParameters message according to its own level ATClassId and the service type Profileld to be initiated.
  • Step 305 The terminal calculates the transmit power of the access probe according to the selected access probe initial power adjustment parameter.
  • the terminal selects the access packet prefix length and the access packet length according to the HRPD air interface protocol, and selects the transmission rate of the access probe according to the length of the access packet; Investigate the initial power adjustment parameters according to HRPD
  • the provisions of the air interface protocol calculate the transmit power of the access probe. Specifically, if the terminal finds the corresponding ProfileBasedProbelnitialAdjust in the AccessParameters message according to its own ATClass and Profileld, the ProfileBasedProbelnitialAdjust is substituted for the ProbelnitialAdjust in the formula (2) to calculate the open-loop average output power of the access terminal pilot channel, thereby The transmit power of the access probe is further calculated.
  • Step 306 The terminal sends an access probe according to the calculated transmit power.
  • the manner in which the terminal sends access probes is the same as in the prior art.
  • the present invention also provides an access level control system, including a base station and a terminal, where the base station is configured to add a parameter related to the initial power adjustment of the access probe in the access parameter message;
  • the terminal is configured to select a corresponding access probe initial power adjustment parameter ProfileBasedProbelnitialAdjust in the access parameter message according to the level of the service and the type of the service to be initiated, and calculate the transmission of the access probe according to the selected access probe initial power adjustment parameter. Power, and transmitting access probes according to the calculated transmit power.
  • the base station adds parameters related to the initial power adjustment of the access probe in the access parameter message, including: ATClassNum, ATClassId, NumProfiles, Profileld, and ProfileBasedProbelnitialAdjust ⁇
  • the base station is further configured to broadcast, at each cell, an access parameter message carrying parameters related to access probe initial power adjustment.
  • the terminal is further configured to perform session negotiation with the base station to determine a service type list that the terminal and the base station can support;
  • the base station is further configured to perform session negotiation with the terminal, determine a service type list that the terminal and the base station can support, and notify the terminal by negotiating a configuration message after determining the level of the terminal.
  • the terminal is further configured to use a default parameter when the corresponding access probe initial power adjustment parameter is not found in the access parameter message according to the level of the service and the service type that needs to be initiated.
  • ProbelnitialAdjust calculates the transmit power of the access probe.
  • the method for selecting the initial power adjustment parameter for access to the trial according to the user's level and service type which ensures that the high priority user and the high priority service type have higher initial transmit power, thereby enabling It is ensured that high-priority services can preferentially access the network in the same wireless environment, especially when the user is in a poor infinite environment, and the present invention can improve the access success for high-priority users and high-priority services. Rate, and for different services and different user levels, the present invention can reflect the difference in user access service levels and quality.
  • the HRPD system based on the CDMA system is mainly taken as an example, and the above is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention.

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Abstract

本发明公开一种接入等级控制方法,基站在接入参数消息中增加与接入试探初始功率调整相关的参数,终端根据自身的级别及需要发起的业务类型,选择接入参数消息中对应的接入试探初始功率调整参数,计算接入试探的发射功率,并根据计算的发射功率发送接入试探。本发明还相应地公开一种接入等级控制系统。由于本发明能够以相对较高的功率对优先级高的用户及对时延要求较高的业务发送接入试探,从而在提高优先级高的用户及对时延要求较高的业务的接入速度的同时,能够一定程度上减小优先级低的用户及对时延要求较低的业务接入的碰撞机会,所以,本发明能够提高终端接入成功率,并提高接入速度。

Description

一种接入等级控制方法及系统 技术领域
本发明涉及无线通信系统接入技术, 尤其涉及一种接入等级控制方法 及系统。 背景技术
无线通信系统中, 在终端与系统之间建立业务连接之前, 终端先在一 条公共信道(即接入信道)上发送建立业务连接所必须的信息, 进行通信 信道的申请。 终端在需要接入时会发送一系列的接入试探进行接入尝试, 每个接入试探包括前缀部分和数据部分, 其中数据部分为一个或多个物理 层分组数据包。 接入试探的前缀部分对应接入信道的一个导频信道, 而数 据部分则对应接入信道的一个导频信道和数据信道。 图 1 为接入信道的接 入试探结构示意图, 如图 1 所示, 每个接入试探包括一个前缀和一个或多 个物理层分组数据包, 终端在接入信道周期持续时间的起点开始发送接入 试探, 在每个接入试探中, 导频(I-channel )先被使能, 并起到前缀的作用。 在 PreambleLength 个帧 (即 ( PreambleLength x 16 时隙)后, 试探数据 ( Q-channel )被使能, 达到 CapsuleLengthMax χ 16 个时隙。
图 2为接入试探序列发送的时序示意图, 如图 2所示, 每次接入过程, 终端需要发送一系列的接入试探序列, 每个接入试探序列最多发送 ProbeNumStep ( AccessParameters消息的参数)个接入试探。 接入试探序列 中的每个试探以递增的功率被发送, 直到满足下列任一条件:
( 1 ) 接入终端接收到一个 ACAck 消息;
( 2 ) 传输因协议接收到一个 Deactivate 命令而被中断;
( 3 ) 已传输的试探数目达到每个序列的最大试探数( ProbeNumStep ), ProbeNumSte 是接入参数 ( AccessParameters ) 消息中携带的参数。
在发送第一个试探之前, 接入终端会执行用于控制接入信道阻塞的持 续性检测。 此外, 接入终端还会在试探序列之间执行持续性检测。
具体的, 发送接入试探序列中第 i个接入试探的功率 Pi按照公式( 1 ) 计算:
Ρι= X0 + (i-1) X PowerStep ( 1 )
其中, X0表示接入终端导频信道的开环平均输出功率, 计算方法如公 式(2 ):
X0 = -平均 RX 功率 (dBm) + OpenLoop Adjust + ProbelnitialAdjust ( 2 ) 这里, 平均 RX 功率(平均接收功率)是每一次试探发送时对前向接 收功率的估计; 功率调整步长( PowerStep )、 开环调整( OpenLoop Adjust ) 和试探初始调整 ( ProbelnitialAdjust )为 AccessParameters消息携带的参数。 AccessParameters消息是系统向每个小区广播的公共消息, 用于向小区下的 接入终端传递接入信道的信息。 现有技术中, AccessParameters消息结构如 表 1所示:
Figure imgf000004_0001
下列域出现 NACMPAPersist次
APersistence 6
Reserved variable 表 1
其中, NACMPAPersist为 CS0024标准中定义的接入信道 MAC协议的 常量。
对于接入信道的数据信道, 其发射功率与接入信道导频信道功率有关, 数据信道的功率相对于导频信道功率有一定的增量, 不同的发射速率数据 信道相对于导频信道的功率不同, 表 2为数据信道的功率相对与导频信道 功率的具体取值:
Figure imgf000005_0001
表 2
其中, DataOffsetNom, DataOffset9k6 , DataOffsetl9k2和 DataOffset38k4 是接入信道 MAC协议的公有数据, 在接入信道 MAC层协议配置消息中的 功率参数属性中定义。
根据接入试探发送的规则, 如果终端发送的接入试探能够成功的被基 站解调,基站就会向终端发送 ACAck 消息,通知终端停止此次接入试探序 列的发送。 因此, 如果每次终端发送一次试探就能被基站成功解调, 那么 接入的时间最短, 而且也能减小与其他终端接入碰撞的机会, 即提高用户 接入试探发射功率可以加速用户的接入, 但是, 现有 HRPD等系统中, 相 同小区下所有的用户, 接入信道功率参数使用同一套参数, 所以, 终端接 入时与其他终端接入碰撞的机会较大, 影响接入速度, 并且, 对于 CDMA 这样的自干扰系统, 当各用户都以较高功率发射接入试探会造成用户间较 大的干扰, 从而影响接入成功率。 发明内容
有鉴于此, 本发明的主要目的在于提供一种接入等级控制方法及系统, 能够提高接入速度, 以及提高用户体验。
为达到上述目的, 本发明的技术方案是这样实现的:
一种接入等级控制方法, 基站在接入参数消息中增加与接入试探初始 功率调整相关的参数, 该方法包括:
终端根据自身的级别及需要发起的业务类型, 选择接入参数消息中对 应的接入试探初始功率调整参数 ProfileBasedProbelnitialAdj ust;
终端根据所述选择的接入试探初始功率调整参数计算接入试探的发射 功率, 并根据所述计算的发射功率发送接入试探。
所述与接入试探初始功率调整相关的参数包括: ATClassNum、
ATClassId、 NumProfiles、 Profileld和 ProfileBasedProbelnitialAdj ust。
所述终端确定对应的接入试探初始功率调整参数之前, 还包括步骤: 基站在每个小区广播所述携带与接入试探初始功率调整相关的参数的接入 参数消息。
所述终端确定对应的接入试探初始功率调整参数之前, 还包括步骤: 终端与基站进行会话协商, 确定终端及基站都能支持的业务类型列表, 以 及由基站在确定终端的级别后, 通过协商配置消息通知终端。
所述终端根据自身的级别及需要发起的业务类型, 选择接入参数消息 中对应的接入试探初始功率调整参数时, 终端根据自身的级别及需要发起 的业务类型在接入参数消息中找不到对应的接入试探初始功率调整参数, 则使用缺省参数 ProbelnitialAdjust计算接入试探的发射功率。
一种接入等级控制系统, 包括基站和终端,
所述基站, 用于在接入参数消息中增加与接入试探初始功率调整相关的 械; 所述终端, 用于根据自身的级别及需要发起的业务类型, 选择接入参 数消息中对应的接入试探初始功率调整参数 ProfileBasedProbelnitialAdjust; 以及根据所述选择的接入试探初始功率调整参数计算接入试探的发射功 率, 并根据所述计算的发射功率发送接入试探。
所述基站在接入参数消息中增加的与接入试探初始功率调整相关的参 数 包 括 : ATClassNum 、 ATClassId 、 NumProfiles 、 Profileld 和 ProfileBasedProbelnitialAdjust。
所述基站, 还用于在每个小区广播携带与接入试探初始功率调整相关 的参数的接入参数消息。
所述终端, 还用于与基站进行会话协商, 确定终端及基站都能支持的 业务类型列表;
所述基站, 还用于与终端进行会话协商, 确定终端及基站都能支持的 业务类型列表; 以及在确定终端的级别后, 通过协商配置消息通知终端。
所述终端, 还用于在根据自身的级别及需要发起的业务类型在接入参 数消息中找不到对应的接入试探初始功率调整参数时, 使用缺省参数 ProbelnitialAdjust计算接入试探的发射功率。
本发明接入等级控制方法及系统,通过修改 AccessParameters消息的发 送内容, 使 AccessParameters 消息包含与接入试探初始功率调整相关的参 数, 使终端在接入时, 能够根据其级别及业务类型选择不同的接入试探初 始功率调整参数来确定接入试探的发射功率。 由于本发明能够以相对较高 的功率对优先级高的用户及对时延要求较高的业务发送接入试探, 从而在 提高优先级高的用户及对时延要求较高的业务的接入速度的同时, 能够一 定程度上减小优先级低的用户及对时延要求较低的业务接入的碰撞机会, 所以, 本发明能够提高终端接入成功率, 并提高接入速度。 附图说明
图 1为接入信道的接入试探结构示意图;
图 2为接入试探序列发送的时序示意图;
图 3为本发明接入等级控制方法流程示意图。 具体实施方式
本发明的基本思想是: 通过修改 AccessParameters消息的发送内容,使 AccessParameters消息包含与接入试探初始功率调整相关的参数, 使终端在 接入时, 能够根据其级别及业务类型选择不同的接入试探初始功率调整参 数来确定接入试探的发射功率。
下面结合附图对技术方案的实施作进一步的详细描述。
图 3为本发明接入等级控制方法流程示意图, 如图 1所示, 本发明接 入等级控制方法一般包括以下步骤:
步骤 301: 基站在每个小区广播 AccessParameters消息。
这里, 基站一般通过前向公共信道 (控制信道) 在每个小区广播 AccessParameters 消息, AccessParameters 消息中包含了不同级别的用户及 不 同 的 业务类 型 所对应 的接入试探初始 功 率调 整参数 ( ProfileBasedProbelnitialAdjust )。
本发明中, AccessParameters消息结构如表 3所示:
Figure imgf000008_0001
PreambleLength 3
CapsuleLengthMax 4
下列域出现 NACMPAPersist次
APersistence 6
ATClassNum 2
下列域出现 ATClassNum次
Figure imgf000009_0001
Reserved variable
表 3
这里, ATClassNum表示用户等级个数, 可以按照优先级别的高低划分 成 4个等级, 例如: ATClassId 0表示最高级别的用户, ATClassId 3表示最 低级别的用户。 表 3 中与接入试探初始功率调整相关的参数包括: ATClassNum, AT等级编号( ATClassId )、 应用类型的个数( NumProfiles )、 应用类型编号 ( Profileld ) 和 ProfileBasedProbelnitialAdjust , 其中, ProfileBasedProbelnitialAdjust 为与用户等级及业务类型对应的接入试探初 始功率调整。 从表 3 可以看出, 每一种 ATClassId都对应 NumProfiles个 Profileld 域及 ProfileBasedProbelnitialAdjust 域, 这样针对 (ATClsssId , Profileld )对才能找到唯一的 ProfileBasedProbelnitialAdjust参数, 所以, 实 际上 Profileld域及 ProfileBasedProbelnitialAdjust域总共要出现 ATClassNum X NumProfiles次。
常见的业务类型有如下几种: IP上的话音(Voice Over IP, VoIP ), 可 视电话( Video Telephone , VT ), Web浏览及 FTP应用等。本发明中, Profileld 所对应的业务类型采用 《 Administration of Parameter Value Assignments for cdma2000 Spread Spectrum Standards》标准中的定义, 例如, Profileld 256 对应 VoIP业务类型。
在实际应用中, 对于高优先级的用户及高优先级的业务类型, ProfileBasedProbelnitialAdjust—般设置为相对较大的值, 例如, ATClassId 0 比 ATClassId 1的各种业务类型所对应的 ProfileBasedProbelnitialAdjust取值 大; 相同的 ATClass 中, VoIP, VT, Web 浏览及 FTP应用业务类型的 ProfileBasedProbelnitialAdjust的取值可以依次减小。
步骤 302: 终端与基站进行会话(Session )协商。
终端与基站进行会话 (Session )协商时, 主要确定终端及基站都能支 持的业务类型 (Profileld ) 列表, 另外, 基站确定终端的级别 (ATClass ) 后, 通过协商配置消息通知终端。
本发明中, 终端的级别一般由网络运营商按照实际情况进行定义, 并 统一进行维护。
步骤 303: 终端确定需要发送接入请求的业务类型 ProfileId。
步骤 304 : 终端根据自身的级别 ATClassId 及需要发起的业务类型 Profileld选择 AccessParameters消息中对应的接入试探初始功率调整参数。
需要说明的是, 如果终端根据自身的 ATClass 及 Profileld 在 AccessParameters 消息中找不到对应的接入试探初始功率调整参数 ProfileBasedProbelnitialAdjust , 则使用缺省参数 ProbeInitialAdjust。
步骤 305:终端根据选择的接入试探初始功率调整参数计算接入试探的 发射功率。
例如,对于基于 CDMA制式的 HRPD系统,终端按照 HRPD空中接口 协议的规定选择接入包前缀长度、 接入包长度, 并根据接入包的长度选择 接入试探的发送速率;根据所选择的接入试探初始功率调整参数按照 HRPD 空中接口协议的规定计算接入试探的发射功率。 具体的, 如果终端根据自 身的 ATClass 及 Profileld 在 AccessParameters 消息中找到对应的 ProfileBasedProbelnitialAdjust, 则以所述 ProfileBasedProbelnitialAdjust替代 公式(2 ) 中的 ProbelnitialAdjust, 以计算接入终端导频信道的开环平均输 出功率, 从而进一步计算接入试探的发射功率。
步骤 306: 终端根据计算的发射功率发送接入试探。
确定发射功率后, 终端发送接入试探的方式与现有技术相同。
本发明还提出一种接入等级控制系统, 包括基站和终端, 其中, 基站用于在接入参数消息中增加与接入试探初始功率调整相关的参 数;
终端用于根据自身的级别及需要发起的业务类型, 选择接入参数消息 中对应的接入试探初始功率调整参数 ProfileBasedProbelnitialAdjust;以及根 据所述选择的接入试探初始功率调整参数计算接入试探的发射功率, 并根 据所述计算的发射功率发送接入试探。
基站在接入参数消息中增加与接入试探初始功率调整相关的参数包 括 : ATClassNum 、 ATClassId 、 NumProfiles 、 Profileld 和 ProfileBasedProbelnitialAdjust^
基站还用于在每个小区广播携带与接入试探初始功率调整相关的参数 的接入参数消息。
终端还用于与基站进行会话协商, 确定终端及基站都能支持的业务类 型列表;
基站还用于与终端进行会话协商, 确定终端及基站都能支持的业务类 型列表; 以及在确定终端的级别后, 通过协商配置消息通知终端。
终端还用于在根据自身的级别及需要发起的业务类型在接入参数消息 中找不到对应的接入试探初始功率调整参数时, 使用缺省参数 ProbelnitialAdjust计算接入试探的发射功率。
根据上述描述, 本发明提出的根据用户的级别及业务类型选择接入试 探初始功率调整参数的方法, 能保证高优先级的用户及高优先级的业务类 型有较高的初始发射功率, 从而能保证在相同无线环境中高优先级的业务 能优先接入网络, 尤其当用户处在较差的无限环境中时, 对于高优先级的 用户及高优先级的业务, 本发明能提高其接入成功率, 而对于不同的业务 及不同的用户级别, 本发明能体现出用户接入服务等级及质量的差异。
实施例中主要以基于 CDMA制式的 HRPD系统为例, 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。

Claims

权利要求书
1、 一种接入等级控制方法, 其特征在于, 基站在接入参数消息中增加 与接入试探初始功率调整相关的参数, 该方法包括:
终端根据自身的级别及需要发起的业务类型, 选择接入参数消息中对 应的接入试探初始功率调整参数;
终端根据所述选择的接入试探初始功率调整参数计算接入试探的发射 功率, 并根据所述计算的发射功率发送接入试探。
2、 根据权利要求 1所述的接入等级控制方法, 其特征在于, 所述与接 入试探初始功率调整相关的参数包括: 用户等级个数 ATClassNum、 AT等 级编号 ATClassId、 应用类型的个数 NumProfiles, 应用类型编号 Profileld 和接入试探初始功率调整参数。
3、 根据权利要求 2所述的接入等级控制方法, 其特征在于, 所述终端 选择对应的接入试探初始功率调整参数之前, 该方法还包括: 基站在每个 小区广播携带所述与接入试探初始功率调整相关的参数的接入参数消息。
4、根据权利要求 1至 3任一项所述的接入等级控制方法,其特征在于, 所述终端选择对应的接入试探初始功率调整参数之前, 该方法还包括: 终 端与基站进行会话协商, 确定终端及基站都能支持的业务类型列表, 以及 由基站在确定终端的级别后, 通过协商配置消息通知终端。
5、 根据权利要求 1所述的接入等级控制方法, 其特征在于, 所述终端 根据自身的级别及需要发起的业务类型, 选择接入参数消息中对应的接入 试探初始功率调整参数时, 终端根据自身的级别及需要发起的业务类型在 接入参数消息中找不到对应的接入试探初始功率调整参数, 则使用缺省参 数 ProbelnitialAdjust计算接入试探的发射功率。
6、 一种接入等级控制系统, 包括基站和终端, 其特征在于,
所述基站, 用于在接入参数消息中增加与接入试探初始功率调整相关 的参数;
所述终端, 用于根据自身的级别及需要发起的业务类型, 选择接入参 数消息中对应的接入试探初始功率调整参数; 以及根据所述选择的接入试 探初始功率调整参数计算接入试探的发射功率, 并根据所述计算的发射功 率发送接入试探。
7、 根据权利要求 6所述的接入等级控制系统, 其特征在于, 所述基站 在接入参数消息中增加的与接入试探初始功率调整相关的参数包括: ATClassNum、 ATClassId, NumProfiles, Profileld和接入试探初始功率调整 参数。
8、 根据权利要求 7所述的接入等级控制系统, 其特征在于,
所述基站, 还用于在每个小区广播携带与接入试探初始功率调整相关 的参数的接入参数消息。
9、根据权利要求 6至 8任一项所述的接入等级控制系统,其特征在于, 所述终端, 还用于与基站进行会话协商, 确定终端及基站都能支持的 业务类型列表;
所述基站, 还用于与终端进行会话协商, 确定终端及基站都能支持的 业务类型列表; 以及在确定终端的级别后, 通过协商配置消息通知终端。
10、 根据权利要求 6所述的接入等级控制系统, 其特征在于, 所述终端, 还用于在根据自身的级别及需要发起的业务类型在接入参 数消息中找不到对应的接入试探初始功率调整参数时, 使用缺省参数 ProbelnitialAdjust计算接入试探的发射功率。
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