WO2012034278A1 - 一种e-tti选择的方法及系统 - Google Patents

一种e-tti选择的方法及系统 Download PDF

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Publication number
WO2012034278A1
WO2012034278A1 PCT/CN2010/076968 CN2010076968W WO2012034278A1 WO 2012034278 A1 WO2012034278 A1 WO 2012034278A1 CN 2010076968 W CN2010076968 W CN 2010076968W WO 2012034278 A1 WO2012034278 A1 WO 2012034278A1
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tti
rnc
type
common
dch
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PCT/CN2010/076968
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English (en)
French (fr)
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黄梅青
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中兴通讯股份有限公司
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Priority to PCT/CN2010/076968 priority Critical patent/WO2012034278A1/zh
Publication of WO2012034278A1 publication Critical patent/WO2012034278A1/zh

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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W72/00Local resource management
    • H04W72/50Allocation or scheduling criteria for wireless resources
    • H04W72/54Allocation or scheduling criteria for wireless resources based on quality criteria
    • H04W72/543Allocation or scheduling criteria for wireless resources based on quality criteria based on requested quality, e.g. QoS

Definitions

  • the present invention relates to an E-DCH channel transmission time interval (E-TTI) selection technique, and more particularly to an uplink enhancement (FACH, CELL-FACH state and IDLE state in Wideband Code Division Multiple Access (WCDMA). Enhanced Uplink in CELL—FACH state and Idle mode) Method and system for E-TTI selection in function. Background technique
  • the R8 protocol introduces the FACH function.
  • This FACH refers to the CELL-FACH state, that is, the CELL-FACH state uplink uses the Enhanced Dedicated Channel (E-DCH) channel for data transmission, and the idle (IDLE) state uses the E-DCH channel.
  • E-DCH Enhanced Dedicated Channel
  • IDLE idle
  • E-DCH Enhanced Dedicated Channel
  • UE User equipment
  • CCCH Common Control Channel
  • RNC Radio Network Controller
  • E-TTI For uplink enhanced FACH, E-TTI has two optional parameter types, one is 2ms E-TTI and the other is 10ms E-TTI, both of which have advantages and disadvantages.
  • the characteristics of 2ms E-TTI are: high rate; short delay; small coverage, suitable for UEs not at the edge of the cell, and delay-sensitive service transmission; and 10ms E-TTI is characterized by: coverage ratio 2ms E-TTI Large, the interference generated by the neighboring area is small, suitable for UEs at the edge of the cell, and for service transmissions that are not sensitive to delay.
  • the existing protocol stipulates that when the UE uses the uplink enhanced FACH, the E-DCH transmission can only be performed according to the RN- ⁇ broadcast of the RNC. That is to say, only one fixed ⁇ - ⁇ type can be used for transmission, and the E-TTI type is not optional.
  • the E-TTI type cannot be adjusted correspondingly by using the prior art.
  • the advantages and disadvantages of the above different E-TTI types if a fixed E-TTI type is used for transmission from beginning to end, it is inevitably applicable to data transmission in all scenarios. Summary of the invention
  • the main object of the present invention is to provide an E-TTI selection method and system, which are optional for two sets of common E-DCH system parameters of different E-TTI types, and are suitable for data transmission in all scenarios.
  • An E-TTI selection method includes: when a cell supports an uplink enhanced FACH, the radio network controller (RNC) configures two sets of optional common E-DCH system parameters, and the two sets of optional public E-
  • the DCH system parameters respectively correspond to the 10 ms and 2 ms types of E-DCH channel transmission time interval (E-TTI); the ⁇ - ⁇ type used by the RNC or user equipment (UE) is selected, and the UE uses the selected one.
  • the common E-DCH system parameters corresponding to the ⁇ - ⁇ type.
  • the method further includes: the RNC configuring, by the RNC, two sets of common E-DCH system parameters corresponding to different types of ⁇ - ⁇ through the System Information Block (SIB) message to the UE;
  • SIB System Information Block
  • the SIB message includes SIB5 or SIB5bis.
  • the performing the selection by the UE specifically includes: when the UE initiates the uplink random access, selecting, according to at least one of the radio quality and the service characteristics measured by the UE, selecting an E-TTI type to be used, A set of common E-DCH system parameters corresponding to the selected E-TTI type is used.
  • the RNC performing the selecting specifically includes: according to at least one of a measurement result of the random access channel reported by the UE, a service characteristic, and a radio resource management policy of the RNC, The E-TTI type used by the decision is selected. After the RNC notifies the UE of the selected E-TTI type, the UE uses a set of common E-DCH system parameters corresponding to the selected E-TTI type.
  • the method further includes: changing the selected one type of E-TTI; the changing specifically includes: when the initially selected ⁇ - ⁇ type is 2ms E-TTI, when the UE moves to At the cell edge, when the radio quality is degraded, the RNC detects that the user's radio quality is degraded, and modifies the selected E-TTI type to be 10 ms E-TTI.
  • An E-TTI selected system includes: a configuration unit and a selection unit; wherein, the configuration unit is configured to: when the cell supports the uplink enhanced FACH, the RNC configures two sets of optional common E-DCH system parameters, where The two sets of optional common E-DCH system parameters respectively correspond to the E-TTI type of E-TTI of 10 ms and 2 ms;
  • the selecting unit is configured to select, by the RNC or the UE, the type of the ⁇ - ⁇ used, and the UE uses the common E-DCH system parameter corresponding to the selected E-TTI type.
  • the configuration unit is further configured to: before the UE performs the selecting, the RNC configures two sets of common E-DCH system parameters corresponding to different E-TTI types to the UE by using an SIB message; the SIB message. Includes SIB5 or SIB5bis.
  • the selecting unit is located at the UE side, and is further configured to: when the UE initiates uplink random access, select one type of E- used according to at least one of radio quality and service characteristics measured by the UE.
  • the TTI type and uses a set of common E-DCH system parameters corresponding to the selected E-TTI type.
  • the selection unit is located at the RNC side, and is further configured to select, according to at least one of the measurement result of the random access channel, the service characteristic, and the radio resource management policy of the RNC.
  • An E-TTI type used after the RNC notifies the UE of the selected E-TTI type, the UE uses a set of common E-DCH system parameters corresponding to the selected ⁇ - ⁇ type.
  • the system further includes an E-TTI type change unit, which is used after the service is established.
  • E-TTI type is 2ms E-TTI
  • the RNC detects that the user's radio quality is degraded
  • the selected ⁇ - ⁇ type is 10ms E. -TTI.
  • the RNC configures two sets of optional common E-DCH system parameters, and the two sets of optional common E-DCH system parameters respectively correspond to the ms- ⁇ 10ms and 2ms types of ⁇ - ⁇ .
  • the E-TTI type used by the RNC or UE selection decision the UE uses the common E-DCH system parameters corresponding to the selected E-TTI type.
  • two sets of common E-DCH system parameters are configured, and respectively correspond to two types of ⁇ - ⁇ of 10 ms and 2 ms of E-TTI, namely: two sets of common E-DCH system parameters corresponding to different E-TTI types It is optional, in order to make full use of the advantages of different E-TTI types, and avoid the disadvantages brought by it, so as to ensure the cell coverage and the service quality of the UE service as much as possible, and try to generate small neighbor interference.
  • FIG. 1 is a schematic diagram of RNC configuration ⁇ - ⁇ when signaling is carried on a common E-DCH channel according to the present invention
  • FIG. 2 is a schematic diagram of an RNC configuring an E-TTI when a cell is reselected according to the present invention
  • FIG. 3 is a schematic diagram of the RNC changing the E-TTI after the service is established according to the present invention. detailed description
  • the RNC configures two sets of optional common E-DCH system parameters, and the two sets of optional common E-DCH system parameters respectively correspond to 10 ms and 2 ms of the E-TTI.
  • E-TTI type The E-TTI type used by the RNC or UE selection is determined, and the UE uses the common E-DCH system parameter corresponding to the selected E-TTI type.
  • the E-TTI scheme of the present invention is configured with two sets of common E-DCHs corresponding to different E-TTI types. Based on the system parameters, the RNC can select an appropriate E-TTI type according to the radio quality and service characteristics of the current UE, and correspondingly use the common E-DCH system parameters, so as to ensure the cell coverage and the service quality of the UE service as much as possible. , try to produce less neighbor interference. It is because the present invention fully utilizes the advantages of different E-TTI types and avoids the disadvantages thereof, and can be applied to data transmission in all scenarios.
  • a method of E-TTI selection which mainly includes the following contents:
  • the RNC configures two sets of optional common E-DCH system parameters, and the two sets of optional common E-DCH system parameters respectively correspond to the ms- ⁇ 10ms and 2ms E-TTI types; Or the UE chooses to determine the type of E-TTI used, and the UE uses the common E-DCH system parameters corresponding to the selected E-TTI type.
  • the RNC configures two sets of common E-DCH system parameters corresponding to different E-TTI types to the Node B (NodeB) and the UE through physical shared channel reconfiguration messages and System Information Block (SIB) messages, respectively.
  • the SIB message includes SIB5 or SIB5bis. That is to say, the RNC will configure the two sets of common E-DCH system parameters corresponding to different E-TTI types to be used by the NodeB to be the physical shared channel reconfiguration message; the RNC will correspond to two sets of common Es of different E-TTI types.
  • the message that the DCH system parameter is configured for the UE is SIB5 or SIB5bis, and both SIB5 and SIB5bis belong to the system message.
  • SIB refers to the system information block, SIB5 and SIB5bis structure, only the supported carrier frequency band is different, SIB5bis can be used for BAND IV, IX, X frequency band.
  • two sets of common E-DCH system parameters corresponding to different E-TTI types are respectively transmitted to the NodeB and the UE, because a unified configuration must be ensured between the NodeB and the UE to facilitate encoding/decoding between the two.
  • the UE side receives two sets of common E-DCH system parameters corresponding to different E-TTI types sent by the RNC, and can select the E-TTI type to be used according to the needs of the scenario, and use the selected E-TTI.
  • the common E-DCH system parameter corresponding to the type is: when the UE initiates an uplink random access procedure to acquire an E-DCH resource, the UE may be based on the measured radio quality, At least one of the business characteristics and the like, the selection determines an E-TTI type used, and uses a set of common E-DCH system parameters corresponding to the selected E-TTI type. If the radio quality is good, select 2ms E-TTI; if the radio quality is not good, select 10ms E-TTL. If the service with high delay requirement is initiated, such as voice, select 2ms E-TTI; otherwise, select 10ms E-TTI.
  • the quality of wireless depends on the specific implementation, and there is no unified standard. For example, if the UE measures RSCP greater than -90dbm, the radio quality is better. If the RSCP is less than -102dbm, the radio quality is considered to be poor.
  • the delay is short, and may be 2ms TTI; for web browsing services, the delay requirement is not high, and may be inclined to 10ms.
  • the RNC side selects the E-TTI type to be used according to the needs of the scenario, that is, the RNC receives the RRC connection request (RRC CONNECTION REQUEST) and the cell update.
  • RRC CONNECTION REQUEST RRC CONNECTION REQUEST
  • the measurement result (such as radio quality) of the random access channel (RACH, Random Access Channel) reported by the UE, the service characteristics, and the radio resource management (RRM) policy of the RNC can be used.
  • At least one of the information is selected to determine an E-TTI type used and sent to the UE.
  • the RNC uses a set of common E-DCH system parameters corresponding to the selected E-TTI type.
  • the RRM policy includes: a handover algorithm, an admission algorithm, a load control algorithm, and the like.
  • the invention is illustrated by way of example below.
  • Embodiment 1 The E-TTI is selected by the UE when the initial uplink random access is used.
  • Step 101 The common E-DCH channel parameters sent by the RNC through SIB5 or SIB5bis include two sets of E-TTI parameters: 2ms E-TTI and 10ms E-TTI.
  • Step 102 The UE receives two sets of ⁇ - ⁇ parameters configured by the RNC, and is in the common E-DCH channel.
  • the appropriate E-TTI is selected according to the current radio quality and service characteristics of the UE.
  • Step 103 The UE may notify the NodeB of the E-TTI selected by the UE by using some signaling, such as access prefix signaling.
  • the purpose of this is to: Ensure that the NodeB and the UE are uniformly configured to facilitate encoding/decoding between the two.
  • Embodiment 2 The RNC specifies ⁇ - ⁇ during initial uplink random access.
  • the RNC may firstly designate to the UE by broadcasting first—initial access time The ⁇ - ⁇ used, let the UE temporarily use (possibly the specified ⁇ - ⁇ parameter is not the optimal ⁇ - ⁇ parameter for the current scene), and then the RNC configures the UE two sets of ⁇ - ⁇ parameters to be selected by the UE. At this point, the UE has been running for a period of time using the specified ⁇ - ⁇ parameter, and can get enough information to select.
  • Embodiment 3 When signaling is carried on a common E-DCH channel, R- ⁇ is configured by the RNC.
  • Step 201 The common E-DCH channel parameters sent by the RNC through SIB5 or SIB5bis include two sets of E-TTI parameters: 2ms E-TTI and 10ms E-TTI.
  • Step 202 The UE receives two sets of E-TTI parameters configured by the RNC, initiates uplink random access on the public E-DCH channel, and obtains an E-DCH resource index. data.
  • the RRC CONNECTION REQUEST can be expressed as RRC CONN REQ.
  • Step 204 The NodeB allocates an E-DCH Radio Network Temporary Flag (ERNTI).
  • ERNTI refers to a temporary identifier of the wireless network, and can be represented as a Radio Network Temporary Identity.
  • the FP frame is an FP frame of the Iub/Iur interface, which can be represented by Frame Protocol.
  • the FP frame protocol layer belongs to one layer of the user plane protocol, and defines a frame structure and an inband control process for the transport channel. , wherein the frame structure is divided into a data frame and a control frame according to purposes.
  • Step 206 The RNC decides to establish the signaling in the CELL-FACH state, and selects the ⁇ - ⁇ parameter used by the UE as the 10ms E-TTI according to the RACH measurement result reported by the UE, the service feature initiated by the UE, and the RRM policy.
  • Step 207 The RNC informs the UE of the E-TTI parameter selected by the UE by using an RRC CONNECTION SETUP message.
  • the RRC CONNECTION SETUP message includes ERNTI, CELL-FACH state, and 10ms E-TTI.
  • RRC CONNECTION SETUP can be expressed as RRC CONN SETUP.
  • Step 208 The UE uses the 10ms E-TTI configured by the RNC to communicate with the NodeB to perform uplink data transmission.
  • Step 209 The UE sends an RRC connection establishment completion to the RNC (RRC CONNECTION)
  • RRC CONNECTION SETUP COMPLETE can be expressed as RRC CONN SETUP COMPLETE.
  • Embodiment 4 The E-TTI is configured by the RNC during cell reselection.
  • Step 301 The common E-DCH channel parameters sent by the RNC through SIB5 or SIB5bis include two sets of E-TTI parameters: 2ms E-TTI and 10ms E-TTI.
  • Step 302 The UE cell relocates to the local cell, initiates uplink random access on the public E-DCH channel, and obtains an E-DCH resource index.
  • Step 303 The UE sends the CCCH data to the NodeB by using CELL UPDATE.
  • Step 304 NodeB allocates ERNTL
  • Step 305 The RNC receives the FP frame sent by the NodeB, and the FP frame includes the ERNTI and the CCCH data sent by the CELL UPDATE.
  • Step 306 The RNC decides to establish the signaling and the service in the CELL-FACH state, and selects the E-TTI parameter used by the UE as the 2ms E-TTI according to the RACH measurement result reported by the UE, the service feature initiated by the UE, and the RRM policy.
  • Step 307 The RNC informs the UE of the E-TTI parameter selected by the UE by using a CELL UDPATE CONFIRM message.
  • the CELL UDPATE CONFIRM message includes ERNTI, CEI-FACH state, and 2ms E-TTI.
  • Step 308 The UE uses the 2ms E-TTI configured by the RNC to communicate with the NodeB to perform uplink data transmission.
  • Step 309 The UE sends a RADIO BEARER RECONFIGURATION COMPLETE message to the RNC.
  • the RB refers to the radio bearer.
  • RADIO BEARER RECONFIGURATION COMPLETE can be expressed as RB RECFG COMPLETE.
  • Embodiment 5 After the service is established, the previously configured ⁇ - ⁇ is changed by the RNC.
  • Step 401 The common E-DCH channel parameters sent by the RNC through SIB5 or SIB5bis include two sets of E-TTI parameters: 2ms E-TTI and 10ms E-TTI.
  • Step 402 The UE cell relocates to the local cell, initiates uplink random access on the public E-DCH channel, and obtains an E-DCH resource index.
  • Step 403 The UE sends the CCCH data to the NodeB by using CELL UPDATE.
  • Step 404 NodeB Assignment ERNTL
  • Step 405 The RNC receives the FP frame sent by the NodeB, and the FP frame includes the ERNTI and the CCCH data sent by the CELL UPDATE.
  • Step 406 The RNC decides to establish the signaling and the service in the CELL-FACH state, according to the UE.
  • the RACH measurement result, the service characteristics initiated by the UE, and the RRM policy are selected, and the E-TTI parameter used by the UE is selected to be 2 ms E-TTI.
  • Step 407 The RNC informs the UE of the E-TTI parameter selected by the UE by using a CELL UDPATE CONFIRM message.
  • the CELL UDPATE CONFIRM message includes the ERNTI, CELL-FACH state, and 2ms E-TTI.
  • Step 408 The UE uses the 2ms E-TTI configured by the RNC to communicate with the NodeB to perform uplink data transmission.
  • Step 409 The UE sends a RADIO BEARER RECONFIGURATION COMPLETE message to the RNC.
  • Step 410 The UE moves to the cell edge, and the radio quality decreases.
  • Step 411 The RNC detects that the user's radio quality is deteriorated, and the ⁇ - ⁇ parameter selected for the UE is 10 ms E-TTI.
  • Step 412 The RNC informs the UE of the E-TTI parameter selected by the UE through the RBIO BEARER RECONFIGURATION message.
  • the RADIO BEARER RECONFIGURATION message includes the ERNTI, CELL-FACH state, and 10ms E-TTI.
  • RADIO BEARER RECONFIGURATION can be expressed as RB RECFG.
  • Step 413 The UE uses the 10ms E-TTI configured by the RNC to communicate with the NodeB to perform uplink data transmission.
  • Step 414 The UE sends a RADIO BEARER RECONFIGURATION COMPLETE message to the RNC.
  • An E-TTI selected system comprising: a configuration unit and a selection unit.
  • the RNC configures two sets of optional common E-DCH system parameters, and the two sets of optional common E-DCH system parameters respectively correspond to the ms- ⁇ 10ms and 2ms E -TTI type.
  • the selection unit is configured to determine the E-TTI type used by the RNC or the UE, and the UE uses the common E-DCH system parameter corresponding to the selected ⁇ - ⁇ type.
  • the configuration unit is further configured to: before the UE performs the selection, the RNC configures two sets of common E-DCH system parameters corresponding to different ⁇ - ⁇ types to the UE through the SIB message; the SIB message includes the SIB5 or the SIB5bis.
  • the selecting unit at this time is further configured to: when the UE initiates uplink random access, select one type of E to be used according to at least one of radio quality and service characteristics measured by the UE. -TTI type, and uses a set of common E-DCH system parameters corresponding to the selected E-TTI type.
  • the selecting unit when the selecting unit is located on the RNC side, the selecting unit at this time is further configured to use, according to at least one of the measurement result of the random access channel reported by the UE, the service characteristic, and the radio resource management policy of the RNC, the selection decision is used.
  • An E-TTI type after the RNC notifies the UE of the selected E-TTI type, the UE uses a set of common E-DCH system parameters corresponding to the selected E-TTI type.
  • the ⁇ - ⁇ type includes: 2ms E-TTI and 10ms ETTI.
  • the system further includes an E-TTI type change unit. After the E-TTI type change unit is used for service establishment, when the initially selected ⁇ - ⁇ type is 2ms E-TTI, when the UE moves to the cell edge, the radio quality decreases. When the RNC detects that the user's wireless quality is degraded, ⁇ ' tampering with the selected ⁇ - ⁇ type is 10ms ⁇ - ⁇ .

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  • Computer Networks & Wireless Communication (AREA)
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Abstract

本发明公开了一种E-TTI选择的方法,该方法包括:小区支持上行增强FACH时,无线网络控制器(RNC)配置两套可选的公共E-DCH系统参数,两套可选的公共E-DCH系统参数分别对应E-DCH信道传输时间间隔(E-TTI)的10ms和2ms两种E-TTI类型。本发明还公开了一种E-TTI选择的系统,该系统中,配置单元用于小区支持上行增强FACH时,RNC配置两套可选的公共E-DCH系统参数,两套可选的公共E-DCH系统参数分别对应E-TTI的10ms和2ms两种E-TTI类型。采用本发明的方法及系统,配置的对应不同E-TTI类型的两套公共E-DCH系统参数具备可选性,适用于所有场景的数据传输。

Description

一种 E-TTI选择的方法及系统 技术领域
本发明涉及 E-DCH信道传输时间间隔 (E-TTI )选择技术, 尤其涉及 一种宽带码分多址( WCDMA, Wideband Code Division Multiple Access )中 CELL— FACH 态和 IDLE 态的上行增强 ( FACH , Enhanced Uplink in CELL— FACH state and Idle mode ) 功能中 E-TTI选择的方法及系统。 背景技术
R8 协议引入了 FACH 功能, 这个 FACH 指 CELL-FACH 态, 即 CELL-FACH 态上行使用增强专用信道 ( E-DCH , Enhanced Dedicated Channel )信道进行数据传输, 空闲 (IDLE ) 态使用 E-DCH信道进行用户 设备 ( UE )接入。 能够减少 UE 接入时间, 减少信道迁移时延, 增加 CELL-FACH态的业务速率。
现有协议的约束是: UE 从公共 E-DCH 信道上发送公共控制信道 ( CCCH )数据时, 只能按照无线网络控制器 ( RNC )广播的 E-TTI来进行 E-DCH传输。
对于上行增强 FACH, E-TTI有两种可选的参数类型,一种是 2ms E-TTI, 另一种是 10ms E-TTI, 二者各有利弊。 2ms E-TTI的特点为: 速率高; 时延 短; 覆盖小, 适用于不在小区边缘的 UE, 以及对时延敏感的业务传输; 而 10ms E-TTI的特点是: 覆盖比 2ms E-TTI大, 对邻区产生的干扰要小, 适 用于在小区边缘的 UE, 以及对时延不敏感的业务传输。
综上所述, 现有协议规定 UE使用上行增强 FACH时, 只能按照 RNC 广播的 Ε-ΤΉ来进行 E-DCH传输。 也就是说, 只能釆用固定的一个 Ε-ΤΉ 类型进行传输, E-TTI类型不具备可选性。 比如当使用上行增强 FACH的 UE从小区中央移动到小区边缘、 或者从小区边缘移动到小区中央、 或者 UE承载的业务特性发生变化的各个场景下, 釆用现有技术, 都无法相应的 调整 E-TTI类型。 总之, 鉴于上述不同 E-TTI类型各有利弊, 如果自始至 终釆用固定的一个 E-TTI类型进行传输, 必然不能适用于所有场景的数据 传输。 发明内容
有鉴于此, 本发明的主要目的在于提供一种 E-TTI选择的方法及系统, 对应不同 E-TTI类型的两套公共 E-DCH系统参数具备可选性, 适用于所有 场景的数据传输。
为达到上述目的, 本发明的技术方案是这样实现的:
一种 E-TTI选择的方法, 该方法包括: 小区支持上行增强 FACH时, 无线网络控制器(RNC )配置两套可选的公共 E-DCH系统参数, 所述两套 可选的公共 E-DCH系统参数分别对应 E-DCH信道传输时间间隔 ( E-TTI ) 的 10ms和 2ms两种 Ε-ΤΉ类型; 由 RNC或用户设备 ( UE )选择决定所使 用的 Ε-ΤΉ类型, UE使用选定的 Ε-ΤΉ类型所对应的公共 E-DCH系统参 数。
其中, 在 UE进行所述选择之前, 该方法还包括: 所述 RNC将配置的 对应不同 Ε-ΤΉ类型的两套公共 E-DCH系统参数通过系统信息块(SIB ) 消息配置给所述 UE; 所述 SIB消息包括 SIB5或 SIB5bis。
其中, UE 进行所述选择具体包括: 所述 UE发起上行随机接入时, 根 据所述 UE测量的无线质量、业务特性中的至少一种信息,选择决定所使用 的一种 E-TTI类型, 并使用选定的 E-TTI类型所对应的一套公共 E-DCH系 统参数。
其中, RNC进行所述选择具体包括: 根据所述 UE上报的随机接入信 道的测量结果、 业务特性、 RNC的无线资源管理策略中的至少一种信息, 选择决定所使用的一种 E-TTI类型 , 在 RNC将选定的 E-TTI类型通知 UE 后, 由 UE使用选定的 E-TTI类型所对应的一套公共 E-DCH系统参数。
其中, 业务建立后, 该方法还包括改变所选择的一种 E-TTI类型; 所 述改变具体包括: 在初始选择的 Ε-ΤΉ类型为 2ms E-TTI的情况下, 当所 述 UE移动到小区边缘, 无线质量下降时, 所述 RNC检测到用户无线质量 下降, 修改所选择的 E-TTI类型为 10ms E-TTI。
一种 E-TTI选择的系统, 该系统包括: 配置单元和选择单元; 其中, 所述配置单元, 用于小区支持上行增强 FACH时, RNC配置两套可选 的公共 E-DCH系统参数, 所述两套可选的公共 E-DCH系统参数分别对应 E-TTI的 10ms和 2ms两种 E-TTI类型;
所述选择单元, 用于由 RNC或 UE选择决定所使用的 Ε-ΤΉ类型, UE 使用选定的 E-TTI类型所对应的公共 E-DCH系统参数。
其中,所述配置单元,进一步用于在 UE进行所述选择之前,所述 RNC 将对应不同 E-TTI类型的两套公共 E-DCH系统参数通过 SIB消息配置给所 述 UE; 所述 SIB消息包括 SIB5或 SIB5bis。
其中, 所述选择单元位于 UE侧, 进一步用于所述 UE发起上行随机接 入时, 根据所述 UE测量的无线质量、 业务特性中的至少一种信息, 选择决 定所使用的一种 E-TTI类型, 并使用选定的 E-TTI类型所对应的一套公共 E-DCH系统参数。
其中, 所述选择单元位于 RNC侧, 进一步用于才艮据所述 1^上>¾的随 机接入信道的测量结果、 业务特性、 RNC的无线资源管理策略中的至少一 种信息, 选择决定所使用的一种 E-TTI类型, 在 RNC将选定的 E-TTI类型 通知 UE后, 由 UE使用选定的 Ε-ΤΉ类型所对应的一套公共 E-DCH系统 参数。
其中, 该系统还包括 E-TTI类型改变单元, 用于业务建立后, 在初始 选择的 E-TTI类型为 2ms E-TTI的情况下, 当所述 UE移动到小区边缘, 无 线质量下降时, 所述 RNC检测到用户无线质量下降, 修改所选择的 Ε-ΤΉ 类型为 10ms E-TTI。
本发明的小区支持上行增强 FACH 时, RNC 配置两套可选的公共 E-DCH系统参数,两套可选的公共 E-DCH系统参数分别对应 Ε-ΤΉ的 10ms 和 2ms两种 Ε-ΤΉ类型; 由 RNC或 UE选择决定所使用的 E-TTI类型, UE 使用选定的 E-TTI类型所对应的公共 E-DCH系统参数。
釆用本发明,配置两套公共 E-DCH系统参数,且分别对应 E-TTI的 10ms 和 2ms两种 Ε-ΤΉ类型, 即: 使得对应不同 E-TTI类型的两套公共 E-DCH 系统参数具备可选性, 以充分利用不同 E-TTI类型的优点, 并避免其带来 的弊端,从而在尽量保证小区覆盖以及 UE业务的服务质量的同时,尽量产 生较小的邻区干扰。 附图说明
图 1为本发明信令承载于公共 E-DCH信道时 RNC配置 Ε-ΤΉ的示意 图;
图 2为本发明小区重选时 RNC配置 E-TTI的示意图;
图 3为本发明业务建立之后 RNC改变 E-TTI的示意图。 具体实施方式
本发明的基本思想是: 小区支持上行增强 FACH时, RNC配置两套可 选的公共 E-DCH 系统参数, 两套可选的公共 E-DCH 系统参数分别对应 E-TTI的 10ms和 2ms两种 E-TTI类型; 由 RNC或 UE选择决定所使用的 E-TTI类型, UE使用选定的 E-TTI类型所对应的公共 E-DCH系统参数。
下面结合附图对技术方案的实施作进一步的详细描述。
本发明的 E-TTI方案,在配置了对应不同 E-TTI类型的两套公共 E-DCH 系统参数的基础上, RNC可以根据当前 UE的无线质量和业务特性等选择 合适的 E-TTI类型, 并对应使用公共 E-DCH系统参数, 从而在尽量保证小 区覆盖以及 UE业务的服务质量的同时,尽量产生较小的邻区干扰。正是由 于本发明充分利用不同 E-TTI类型的优点, 并避免其带来的弊端, 能适用 于所有场景的数据传输。
一种 E-TTI选择的方法, 主要包括以下内容:
小区支持上行增强 FACH时, RNC配置两套可选的公共 E-DCH系统 参数, 两套可选的公共 E-DCH系统参数分别对应 Ε-ΤΉ的 10ms和 2ms两 种 E-TTI类型; 由 RNC或 UE选择决定所使用的 E-TTI类型 , UE使用选 定的 E-TTI类型所对应的公共 E-DCH系统参数。
RNC将对应不同 E-TTI类型的两套公共 E-DCH系统参数分别通过物理 共享信道重配消息、 和系统信息块(SIB ) 消息配置给节点 B ( NodeB )和 UE。这里, SIB消息包括 SIB5或 SIB5bis。也就是说, RNC将对应不同 E-TTI 类型的两套公共 E-DCH系统参数配置给 NodeB所釆用的消息是物理共享信 道重配消息; RNC将对应不同 E-TTI类型的两套公共 E-DCH系统参数配置 给 UE所釆用的消息是 SIB5或 SIB5bis, SIB5和 SIB5bis都属于系统消息。 其中, SIB指系统信息块, SIB5和 SIB5bis结构一样, 只是支持的载波频段 不一样, SIB5bis可以用于 BAND IV、 IX、 X频段。
这里, 将对应不同 E-TTI类型的两套公共 E-DCH系统参数分别传输给 NodeB和 UE,是因为 NodeB和 UE之间必须保证统一的配置, 以便于二者 之间的编码 /解码。
进一步的, UE侧收到 RNC 下发的对应不同 E-TTI类型的两套公共 E-DCH系统参数, 可以根据场景的需要自行选择所使用的 E-TTI类型, 并 使用选定的 E-TTI类型所对应的公共 E-DCH系统参数, 即为: 当 UE发起 上行随机接入过程来获取 E-DCH资源时, UE可以根据测量的无线质量、 业务特性等因素中的至少一种信息, 选择决定所使用的一种 E-TTI类型, 并使用选定的 E-TTI类型所对应的一套公共 E-DCH系统参数。 其中, 如果 无线质量好, 则选择 2ms E-TTI; 如果无线质量不好, 则选择 10ms E-TTL 如果发起的是时延要求高的业务, 比如话音, 则选择 2ms E-TTI; 否则, 选 择 10ms E-TTI。
其中, 针对上述无线质量而言, 无线质量的好坏取决于具体实现, 并 没有统一标准。对具体指标举例来说, UE测量到 RSCP大于 -90dbm时, 可 以认为无线质量比较好; 如果 RSCP小于 -102dbm, 可以认为无线质量比较 差。
其中, 针对上述业务特性而言, 举例来说, 比如 IMS话音, 时延短, 可以倾向于 2ms TTI; 网页浏览类业务, 时延要求不高, 可以倾向于 10ms。
进一步的, RNC侧根据场景的需要选择所使用的 E-TTI类型, 即为: RNC收到 RRC连接请求(RRC CONNECTION REQUEST )和小区更新
( CELL UDPATE ) 消息后, 可以通过 UE上报的随机接入信道( RACH, Random Access Channel )的测量结果(如无线质量)、 业务特性、 RNC的无 线资源管理( RRM , Radio Resource Management )策略等因素中的至少一 种信息, 选择决定所使用的一种 E-TTI类型并下发给 UE。 RNC将选定的 E-TTI类型通知 UE后, 由 UE使用选定的 E-TTI类型所对应的一套公共 E-DCH系统参数。 其中, 所述 RRM策略包括: 切换算法、 接纳算法、 负 荷控制算法等。
以下对本发明进行举例阐述。
实施例 1 : 初始上行随机接入时由 UE自行选择 E-TTI。
步骤 101 : RNC通过 SIB5或 SIB5bis发送的公共 E-DCH信道参数中, 包含 2ms E-TTI和 10ms E-TTI这两套 E-TTI参数。
步骤 102: UE收到 RNC配置的两套 Ε-ΤΉ参数, 在公共 E-DCH信道 发起上行随机接入时,根据当前 UE的无线质量和业务特性等自行选择合适 的 E-TTI。
这里, 如果无线质量好, 则选择 2ms E-TTI; 反之则选择 10ms E-TTI。 如果用户发起话音业务, 则选择 2ms E-TTI; 否则选择 10ms Ε-ΤΉ。
步骤 103: UE可以通过某种信令, 比如接入前缀信令, 将 UE 自行选 择的的 E-TTI告知 NodeB。
这里, 这样做的目的是: 确保 NodeB和 UE之间统一的进行配置, 以 便于二者之间的编码 /解码。
实施例 2: 初始上行随机接入时由 RNC指定 Ε-ΤΉ。
考虑到 UE初始上行随机接入时自行选择 Ε-ΤΉ所需的信息比较少,不 好判决; 并且为了使得 UE的行为尽量简单, 可以由 RNC最初先通过广播 指定给 UE—个初始接入时使用的 Ε-ΤΤΙ, 让 UE暂且使用 (可能这个指定 的 Ε-ΤΉ参数并不是适用于当前场景最优的 Ε-ΤΉ参数 ), 然后 RNC配置 给 UE两套 Ε-ΤΉ参数由 UE自行选择, 此时, UE已经使用指定的 Ε-ΤΤΙ 参数运行一段时间, 能获得足够多的信息进行选择。
实施例 3: 信令承载于公共 E-DCH信道时, 由 RNC配置 Ε-ΤΉ。
如图 1所示, 包括以下步骤:
步骤 201: RNC通过 SIB5或 SIB5bis发送的公共 E-DCH信道参数中, 包含 2ms E-TTI和 10ms E-TTI这两套 E-TTI参数。
步骤 202: UE收到 RNC配置的两套 E-TTI参数, 在公共 E-DCH信道 发起上行随机接入, 获取 E-DCH资源索引。 数据。 RRC CONNECTION REQUEST可以表示为 RRC CONN REQ。
步骤 204: NodeB分配 E-DCH无线网络临时标记( ERNTI )。 其中的 RNTI指无线网络临时标记, 可以表示为 Radio Network Temporary Identity。 步骤 205: RNC收到 NodeB发送的 FP帧 , FP帧中包括 ERNTI、 以及 通过 RRC CONNECTION REQUEST发送的 CCCH数据。 其中, 针对 FP 帧而言, FP帧是 Iub/Iur接口的 FP帧, 可以用 Frame Protocol表示, FP帧 协议层属于用户面协议的其中一层, 为传输信道定义了帧结构和带内控制 过程, 其中, 帧结构按照用途分为数据帧与控制帧。
步骤 206: RNC决策将信令建立在 CELL-FACH态, 根据 UE上报的 RACH测量结果、 UE发起的业务特性和 RRM策略,选择 UE使用的 Ε-ΤΉ 参数为 10ms E-TTI。
步骤 207、 RNC通过 RRC连接建立( RRC CONNECTION SETUP )消 息将为 UE选择的 E-TTI参数告知 UE。 RRC CONNECTION SETUP消息中 包括 ERNTI、 CELL-FACH态、以及 10ms E-TTI。 RRC CONNECTION SETUP 可以表示为 RRC CONN SETUP。
步骤 208: UE釆用 RNC配置的 10ms E-TTI与 NodeB通讯, 进行上行 数据传输。
步骤 209: UE向 RNC发送 RRC连接建立完成( RRC CONNECTION
SETUP COMPLETE ) 消息。 RRC CONNECTION SETUP COMPLETE可以 表示为 RRC CONN SETUP COMPLETE。
实施例 4: 小区重选时由 RNC配置 E-TTI。
如图 2所示, 包括以下步骤:
步骤 301: RNC通过 SIB5或 SIB5bis发送的公共 E-DCH信道参数中, 包含 2ms E-TTI和 10ms E-TTI这两套 E-TTI参数。
步骤 302: UE小区重新定位到本小区,在公共 E-DCH信道发起上行随 机接入, 获取 E-DCH资源索引。
步骤 303: UE通过 CELL UPDATE向 NodeB发送 CCCH数据。
步骤 304: NodeB分配 ERNTL 步骤 305: RNC收到 NodeB发送的 FP帧 , FP帧中包括 ERNTI、 以及 通过 CELL UPDATE发送的 CCCH数据。
步骤 306: RNC决策将信令和业务建立在 CELL-FACH态,根据 UE上 报的 RACH测量结果、 UE发起的业务特性和 RRM策略, 选择 UE使用的 E-TTI参数为 2ms E-TTI。
步骤 307、 RNC通过小区更新确认( CELL UDPATE CONFIRM ) 消息 将为 UE选择的 E-TTI参数告知 UE。 CELL UDPATE CONFIRM消息中包 括 ERNTI、 CEI -FACH态、 以及 2ms E-TTI。
步骤 308: UE釆用 RNC配置的 2ms E-TTI与 NodeB通讯, 进行上行 数据传输。
步骤 309: UE 向 RNC 发送 RB 重配完成 ( RADIO BEARER RECONFIGURATION COMPLETE )消息。 其中的 RB指无线承载。 RADIO BEARER RECONFIGURATION COMPLETE 可以表示为 RB RECFG COMPLETE。
实施例 5: 业务建立之后, 由 RNC改变之前配置的 Ε-ΤΉ。
如图 3所示, 包括以下步骤:
步骤 401: RNC通过 SIB5或 SIB5bis发送的公共 E-DCH信道参数中, 包含 2ms E-TTI和 10ms E-TTI这两套 E-TTI参数。
步骤 402: UE小区重新定位到本小区,在公共 E-DCH信道发起上行随 机接入, 获取 E-DCH资源索引。
步骤 403: UE通过 CELL UPDATE向 NodeB发送 CCCH数据。
步骤 404: NodeB分配 ERNTL
步骤 405: RNC收到 NodeB发送的 FP帧, FP帧中包括 ERNTI、 以及 通过 CELL UPDATE发送的 CCCH数据。
步骤 406: RNC决策将信令和业务建立在 CELL-FACH态,根据 UE上 报的 RACH测量结果、 UE发起的业务特性和 RRM策略, 选择 UE使用的 E-TTI参数为 2ms E-TTI。
步骤 407、 RNC通过 CELL UDPATE CONFIRM消息将为 UE选择的 E-TTI 参数告知 UE。 CELL UDPATE CONFIRM 消息中包括 ERNTI、 CELL-FACH态、 以及 2ms E-TTI。
步骤 408: UE釆用 RNC配置的 2ms E-TTI与 NodeB通讯, 进行上行 数据传输。
步骤 409: UE向 RNC发送 RADIO BEARER RECONFIGURATION COMPLETE消息。
步骤 410: UE移动到小区边缘, 无线质量下降。
步骤 411 : RNC检测到用户无线质量变差, 修改为 UE选择的 Ε-ΤΉ 参数为 10ms E-TTI。
步骤 412: RNC通过 RB重配( RADIO BEARER RECONFIGURATION ) 消息将为 UE 选择的 E-TTI 参数告知 UE 。 RADIO BEARER RECONFIGURATION 消息中包括 ERNTI、 CELL-FACH 态、 以及 10ms E-TTI。 RADIO BEARER RECONFIGURATION可以表示为 RB RECFG。
步骤 413: UE釆用 RNC配置的 10ms E-TTI与 NodeB通讯, 进行上行 数据传输。
步骤 414: UE向 RNC发送 RADIO BEARER RECONFIGURATION COMPLETE消息。
一种 E-TTI选择的系统, 该系统包括: 配置单元和选择单元。 其中, 配置单元用于小区支持上行增强 FACH 时, RNC 配置两套可选的公共 E-DCH系统参数,两套可选的公共 E-DCH系统参数分别对应 Ε-ΤΉ的 10ms 和 2ms两种 E-TTI类型。 选择单元用于由 RNC或 UE选择决定所使用的 E-TTI类型, UE使用选定的 Ε-ΤΉ类型所对应的公共 E-DCH系统参数。 这里,配置单元进一步用于在 UE进行选择之前, RNC将对应不同 Ε-ΤΉ 类型的两套公共 E-DCH系统参数通过 SIB消息配置给 UE; SIB消息包括 SIB5或 SIB5bis。
这里, 当选择单元位于 UE侧时, 此时的选择单元进一步用于 UE发起 上行随机接入时, 根据 UE测量的无线质量、 业务特性中的至少一种信息, 选择决定所使用的一种 E-TTI类型, 并使用选定的 E-TTI类型所对应的一 套公共 E-DCH系统参数。
这里, 当选择单元位于 RNC 侧时, 此时的选择单元进一步用于根据 UE上报的随机接入信道的测量结果、业务特性、 RNC的无线资源管理策略 中的至少一种信息, 选择决定所使用的一种 E-TTI类型, 在 RNC将选定的 E-TTI类型通知 UE后, 由 UE使用选定的 E-TTI类型所对应的一套公共 E-DCH系统参数。
这里, Ε-ΤΉ类型包括: 2ms E-TTI和 10ms ETTI。该系统还包括 E-TTI 类型改变单元, E-TTI类型改变单元用于业务建立后, 在初始选择的 Ε-ΤΉ 类型为 2ms E-TTI的情况下,当 UE移动到小区边缘,无线质量下降时, RNC 检测到用户无线质量下降, ^ί'爹改所选择的 Ε-ΤΤΙ类型为 10ms Ε-ΤΉ。
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 E-TTI选择的方法, 其特征在于, 该方法包括: 小区支持上行 增强 FACH时, 无线网络控制器(RNC )配置两套可选的公共 E-DCH系统 参数, 所述两套可选的公共 E-DCH系统参数分别对应 E-DCH信道传输时 间间隔( Ε-ΤΉ )的 10ms和 2ms两种 E-TTI类型; 由 RNC或用户设备( UE ) 选择决定所使用的 E-TTI类型, UE使用选定的 E-TTI类型所对应的公共 E-DCH系统参数。
2、 根据权利要求 1所述的方法, 其特征在于, 在 UE进行所述选择之 前, 该方法还包括: 所述 RNC将配置的对应不同 Ε-ΤΉ类型的两套公共 E-DCH系统参数通过系统信息块( SIB )消息配置给所述 UE; 所述 SIB消 息包括 SIB5或 SIB5bis。
3、 根据权利要求 2所述的方法, 其特征在于, UE 进行所述选择具体 包括: 所述 UE发起上行随机接入时, 根据所述 UE测量的无线质量、 业务 特性中的至少一种信息, 选择决定所使用的一种 E-TTI类型, 并使用选定 的 E-TTI类型所对应的一套公共 E-DCH系统参数。
4、根据权利要求 1所述的方法, 其特征在于, RNC进行所述选择具体 包括: 根据所述 UE上报的随机接入信道的测量结果、 业务特性、 RNC的 无线资源管理策略中的至少一种信息, 选择决定所使用的一种 E-TTI类型, 在 RNC将选定的 E-TTI类型通知 UE后, 由 UE使用选定的 E-TTI类型所 对应的一套公共 E-DCH系统参数。
5、 根据权利要求 4所述的方法, 其特征在于, 业务建立后, 该方法还 包括改变所选择的一种 E-TTI类型;所述改变具体包括:在初始选择的 Ε-ΤΉ 类型为 2ms E-TTI的情况下,当所述 UE移动到小区边缘,无线质量下降时, 所述 RNC检测到用户无线质量下降, ^ί'爹改所选择的 Ε-ΤΤΙ 类型为 10ms E-TTI。
6、 一种 E-TTI选择的系统, 其特征在于, 该系统包括: 配置单元和选 择单元; 其中,
所述配置单元, 用于小区支持上行增强 FACH时, RNC配置两套可选 的公共 E-DCH系统参数, 所述两套可选的公共 E-DCH系统参数分别对应 E-TTI的 10ms和 2ms两种 E-TTI类型;
所述选择单元, 用于由 RNC或 UE选择决定所使用的 Ε-ΤΉ类型, UE 使用选定的 E-TTI类型所对应的公共 E-DCH系统参数。
7、 根据权利要求 6所述的系统, 其特征在于, 所述配置单元, 进一步 用于在 UE进行所述选择之前, 所述 RNC将对应不同 Ε-ΤΉ类型的两套公 共 E-DCH系统参数通过 SIB消息配置给所述 UE; 所述 SIB消息包括 SIB5 或 SIB5bis。
8、 根据权利要求 7所述的系统, 其特征在于, 所述选择单元位于 UE 侧, 进一步用于所述 UE发起上行随机接入时, 根据所述 UE测量的无线质 量、 业务特性中的至少一种信息, 选择决定所使用的一种 E-TTI类型, 并 使用选定的 E-TTI类型所对应的一套公共 E-DCH系统参数。
9、根据权利要求 6所述的系统, 其特征在于, 所述选择单元位于 RNC 侧, 进一步用于根据所述 UE上报的随机接入信道的测量结果、 业务特性、 RNC的无线资源管理策略中的至少一种信息,选择决定所使用的一种 Ε-ΤΉ 类型 , 在 RNC将选定的 E-TTI类型通知 UE后, 由 UE使用选定的 E-TTI 类型所对应的一套公共 E-DCH系统参数。
10、 根据权利要求 9 所述的系统, 其特征在于, 该系统还包括 Ε-ΤΉ 类型改变单元, 用于业务建立后, 在初始选择的 E-TTI类型为 2ms E-TTI 的情况下, 当所述 UE移动到小区边缘, 无线质量下降时, 所述 RNC检测 到用户无线质量下降, ^ί'爹改所选择的 Ε-ΤΤΙ类型为 10ms Ε-ΤΉ。
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