WO2010099737A1 - 一种单元格式的指示方法、系统和装置 - Google Patents

一种单元格式的指示方法、系统和装置 Download PDF

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Publication number
WO2010099737A1
WO2010099737A1 PCT/CN2010/070827 CN2010070827W WO2010099737A1 WO 2010099737 A1 WO2010099737 A1 WO 2010099737A1 CN 2010070827 W CN2010070827 W CN 2010070827W WO 2010099737 A1 WO2010099737 A1 WO 2010099737A1
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WIPO (PCT)
Prior art keywords
base station
unit
user terminal
format
identifier
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PCT/CN2010/070827
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English (en)
French (fr)
Inventor
赵毅
李国庆
高卓
谌丽
许芳丽
王智学
Original Assignee
大唐移动通信设备有限公司
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Application filed by 大唐移动通信设备有限公司 filed Critical 大唐移动通信设备有限公司
Priority to EP10748327.3A priority Critical patent/EP2405705B1/en
Priority to KR1020117023037A priority patent/KR101329504B1/ko
Publication of WO2010099737A1 publication Critical patent/WO2010099737A1/zh

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Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00Arrangements for detecting or preventing errors in the information received
    • H04L1/0001Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0023Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the signalling
    • H04L1/0025Transmission of mode-switching indication
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W28/00Network traffic management; Network resource management
    • H04W28/02Traffic management, e.g. flow control or congestion control
    • H04W28/06Optimizing the usage of the radio link, e.g. header compression, information sizing, discarding information
    • 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
    • H04W88/00Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/08Access point devices
    • H04W88/10Access point devices adapted for operation in multiple networks, e.g. multi-mode access points

Definitions

  • the invention provides a method, system and device for indicating a unit format.
  • the present application claims to be filed on March 4, 2009 by the Chinese Patent Office, Application No. 200910078850.2, entitled “Instruction Method, System and Apparatus for a Unit Format" Priority.
  • the present invention relates to wireless communication technologies, and in particular, to a method, system and apparatus for indicating a unit format. Background technique
  • the LTE system includes a UE (User Terminal), an eNB (Base Station), and an MME (Mobility Management Entity).
  • UE User Terminal
  • eNB Base Station
  • MME Mobility Management Entity
  • the LTE system protocol stack structure includes: NAS (Non-Access Stratum, non-access) layer; RRC (Radio Resource Control) layer; PDCP (Packet Data Convergence Protocol) layer; RLC (Radio Link) Control Wireless Link Control) Layer; MAC (Media Access Control) and PHY (Physical) layers.
  • NAS Non-Access Stratum, non-access
  • RRC Radio Resource Control
  • PDCP Packet Data Convergence Protocol
  • RLC Radio Link Control Wireless Link Control
  • MAC Media Access Control
  • PHY Physical
  • the protocol stack of the UE and the eNB can be divided into a user plane and a control plane from a vertical direction.
  • the control plane is used for signaling and processing signaling, that is, signaling bearer.
  • the user plane is used to transfer data and process data, ie data bearers.
  • both signaling and data are placed at specific locations in the cell, and then each layer is encapsulated.
  • the PDCP layer of the user plane is mainly used for header compression (or decompression) operations, encryption (or decryption) operations on received data packets (ie, user data).
  • the PDCP layer of the control plane is mainly used Encryption (or decryption), integrity protection (or integrity verification) operations on received packets (ie, control signaling).
  • the PDCP processes the data packets (ie, higher-level units) received from the upper layer and adds the PDCP protocol header to form a PDCP layer packet (ie, PDCP). Layer of the unit), and sent to the lower layer.
  • the embodiment of the invention provides a method, a system and a device for indicating a unit format.
  • the sender and the receiver can operate in the same unit format, thereby improving the efficiency of data transmission.
  • the base station selects one of the plurality of unit formats according to the preset first selection condition
  • a communication system provided by an embodiment of the present invention includes: a base station, configured to select a unit format from a plurality of unit formats according to a preset first selection condition, determine an identifier corresponding to the selected unit format according to a preset correspondence between the unit format and the identifier, and send the identifier Determined identity;
  • the user terminal is configured to perform transmission according to a unit format corresponding to the received identifier.
  • a selection module configured to select one unit format from a plurality of unit formats according to a preset first selection condition
  • An identifier determining module configured to determine, according to a preset correspondence between the unit format and the identifier, an identifier corresponding to the selected unit format
  • a sending module configured to send the determined identifier to the user terminal, to indicate that the user terminal performs transmission according to a unit format corresponding to the identifier.
  • the base station selects one unit format from a plurality of unit formats according to a preset first selection condition; and the base station determines, according to a preset correspondence between the unit format and the identifier, the selected unit format. And the base station sends the determined identifier to the user terminal, where the user terminal is configured to transmit the unit format corresponding to the identifier. Since the base station can indicate which unit format the user terminal operates, it ensures that the sender and the receiver operate in the same unit format, thereby improving the success rate of data transmission and the efficiency of data transmission, thereby further improving the system. Resource utilization and user experience reduce the burden on the system.
  • Figure 1 shows the protocol stack structure of the LTE system
  • FIG. 2 is a schematic structural diagram of a communication system according to an embodiment of the present invention.
  • FIG. 3 is a schematic structural diagram of a base station according to an embodiment of the present invention.
  • FIG. 4 is a schematic flowchart of a method for indicating a unit format according to an embodiment of the present invention. detailed description
  • the base station selects from a plurality of unit formats according to a preset first selection condition.
  • the unit format is selected, and the identifier corresponding to the selected unit format is sent to the user terminal, and is used to instruct the user terminal to perform transmission according to the unit format corresponding to the identifier. Since the base station can indicate which cell format the user terminal operates, the sender and the receiver operate in the same unit format, thereby improving the success rate of data transmission and the efficiency of data transmission.
  • the communication system of the embodiment of the present invention includes: a base station 10 and a user terminal 20.
  • the base station 10 is configured to select a unit format from a plurality of unit formats according to a preset first selection condition, and determine, according to a preset correspondence between the unit format and the identifier, an identifier corresponding to the selected unit format, and Send the identified ID.
  • the user terminal 20 is configured to perform transmission according to a unit format corresponding to the received identifier.
  • the user terminal 20 After receiving the identifier, the user terminal 20 determines the unit format corresponding to the received identifier according to the preset correspondence between the unit format and the identifier, so as to know which unit format should be used to perform data carried in the unit. Receive operations and send operations.
  • the correspondence between the unit format and the identifier set in advance in the user terminal 20 is the same as the correspondence between the unit format and the identifier set in advance by the base station 10.
  • the correspondence between the unit format and the identifier may be stored in the base station 10 and the user terminal 20, respectively, or may be stored in other entities for the base station 10 and the user terminal 20 to call.
  • the base station of the embodiment of the present invention includes: a selection module 100, an identifier determining module
  • the selecting module 100 is configured to select one unit format from a plurality of unit formats according to a preset first selection condition.
  • the first selection condition includes a user terminal support unit format type. Further, the first selection condition may further include a transmission rate required by the bearer established between the user terminal and the base station, a channel condition between the user terminal and the base station, and a cell. One or more of the current load conditions. According to the above two situations, there are two ways to deal with it: Method 1: The first selection condition includes only the user terminal support unit format type, and then the module is selected.
  • 100 selects a unit format that can be supported by the user terminal from a plurality of unit formats according to the user terminal support unit format type.
  • the user terminal support unit format type is a unit format that the user terminal can support, for example, there are two unit formats, and one is a PDCP PDU format in the LTE system (referred to as a first format, and the following description replaces the PDCP in the LTE system with the first format).
  • the PDU format the other is the PDCP PDU format in the LTE-A system (referred to as the second format, the following description replaces the PDCP PDU format in the LTE-A system with the second format).
  • the LTE-A system is compatible with the LTE system, there are cases where the first format and the second format exist in the LTE-A system. If the user terminal is an LTE user terminal, the second format is not supported; if the user terminal is an LTE-A user terminal, the first format and the second format are supported.
  • a unit format suitable for the user terminal can be selected.
  • the LTE-A user terminal If it is an LTE-A user terminal, you can randomly select a format. Preferably, it is determined whether the LTE-A user terminal supports one of Carrier Aggregation (CA) technology and Cooperative Multipoint (CoMP) technology. If supported, the second format is selected, otherwise the first format is selected.
  • CA Carrier Aggregation
  • CoMP Cooperative Multipoint
  • the LTE-A user terminal can also support the number of carriers that can be aggregated and/or the number of cooperative cells, if LTE- If the A user terminal supports the number of carriers that can be aggregated and/or the number of cooperative cells is greater than the set number, the second format is selected, otherwise the first format is selected.
  • the second selection condition includes the user terminal support unit format type, and further includes a transmission rate required for the bearer established between the user terminal and the base station, a channel condition between the user terminal and the base station, and a current load condition of the cell.
  • the selection module 100 determines, according to the user terminal support unit format type, a unit format that all user terminals can support from the plurality of unit formats, according to a transmission rate required by the bearer established between the user terminal and the base station, One or more conditions of the channel condition between the user terminal and the base station and the current load condition of the cell, and selecting a unit format from the determined unit formats that all user terminals can support.
  • the selection module 100 determines that the user terminal supports only one unit format, the channel condition between the user terminal and the base station is not required according to the transmission rate required by the bearer established between the user terminal and the base station, and The cell format is determined by one or more conditions in the current load condition of the cell.
  • the first format and the second format are also described below as an example.
  • the user terminal supports the unit format type.
  • the method according to the user terminal support unit format type in the second method is similar to the method according to the user terminal support unit format type in the method 1. The difference is that if it is determined that the two formats can be selected, then one of the following conditions is determined. One or more of them are further selected.
  • the second format is selected, otherwise the first format is selected.
  • the LTE-A user terminal supports the number of carriers that can be aggregated and/or the number of cooperative cells is greater than the set number, the second format is selected, otherwise the first format is selected.
  • Condition 2 The transmission rate required for the bearer established between the user terminal and the base station.
  • the transmission rate required to check the bearer established between the user terminal and the base station is greater than the first threshold. If the second format is greater than the second format, the first format is selected.
  • Condition 3 The channel condition between the user terminal and the base station.
  • the channel condition between the user terminal and the base station meets a condition, for example, when the signal to noise ratio and/or the signal to interference and noise ratio is greater than the second threshold, determining that the channel condition between the user terminal and the base station satisfies the condition, Thereby selecting the second format; otherwise selecting the first format.
  • Condition 4 The current load status of the community.
  • the current load condition of the cell meets the condition, for example, the current system load is less than the third threshold, and the current load condition of the cell is determined to satisfy the condition, thereby selecting the second format; otherwise, the first format is selected.
  • multiple conditions may be used in combination, for example, using conditions 2 and 3 in combination with condition 1, and first determining condition 2 and then determining condition 3, then in condition 2, establishing between the user terminal and the base station is established.
  • condition 3 is performed. If the transmission rate required for the bearer established between the user terminal and the base station is not greater than the first threshold, the first format is directly selected, and no other conditions are judged.
  • the above is the PDCP PDU format in the LTE system and the PDCP PDU format in the LTE-A system.
  • This embodiment is not limited to the two formats.
  • the other formats are also applicable to the present embodiment, such as the RLC PDU format and LTE in the LTE system.
  • RLC PDU format in system A is also applicable to the present embodiment, such as the RLC PDU format and LTE in the LTE system.
  • the threshold value may be a range value when the judgment is performed, that is, the range value corresponds to a specific one or more formats. The specific selection conditions remain unchanged.
  • the identifier determining module 110 is configured to determine, according to a preset correspondence between the unit format and the identifier, an identifier corresponding to the unit format selected by the selection module 100.
  • the correspondence between the unit format and the identifier may be stored in a database or a file or other form.
  • the sending module 120 is configured to send, by the user terminal, the identifier determined by the identifier determining module 110, and is configured to instruct the user terminal to perform transmission according to the unit format corresponding to the received identifier.
  • the sending module 120 may send the determined identifier in one of the following manners: sending the determined identifier by using a system broadcast;
  • the determined identity is placed in a reserved bit, extension bit, or control domain in the packet.
  • the user terminal after receiving the corresponding information, extracts the identifier from the information.
  • the specific method may be used by the base station to notify the user terminal by using a message; or configured in advance.
  • the base station of the embodiment of the present invention may further include: a parameter information determining module 130, because the unit corresponding to the determined unit format may have multiple parameter information, and the base station is required to notify the user terminal of the parameter information.
  • the parameter information determining module 130 is configured to: after the selecting module 100 selects one unit format from the plurality of unit formats, before the sending module 120 sends the determined identifier, according to the preset second selection Optionally, the parameter information of the unit corresponding to the unit format selected by the selection module 100 is determined.
  • Each unit has its own corresponding parameter information, such as the PDCP PDU format in the LTE-A system.
  • the SN length is one of the parameter information. In different cases, the length of the SN will be different.
  • the second selection condition comprises one or more of the following conditions:
  • Condition 1 The transmission rate required for the bearer established between the user terminal and the base station;
  • Condition 3 The current load status of the community.
  • condition 1, the condition 2, and the condition 3 in the second selection condition are similar to the condition 2, the condition 3, and the condition 4 in the first selection condition, respectively, but may be different in the setting of the threshold value, and the gate corresponding to the specific condition The limits are set as needed.
  • the sending module 120 sends the determined identifier and the parameter information to the user terminal together, and may also be separately sent by using the sending manner described above, and the specific sending manner is similar to the sending manner described above, and is not further described.
  • the user terminal After receiving the identifier and the parameter information, the user terminal performs a receiving operation and a sending operation on the data carried in the unit according to the unit format corresponding to the identifier and the received parameter information.
  • Step 400 A base station selects a unit format from a plurality of unit formats according to a preset first selection condition.
  • Step 401 The base station determines, according to a preset correspondence between the unit format and the identifier, an identifier corresponding to the selected unit format.
  • the correspondence between the unit format and the identifier may be stored in a database or a file or other form.
  • Step 402 The base station sends the determined identifier to the user terminal, where the user terminal is configured to perform transmission according to the unit format corresponding to the received identifier.
  • the first selection condition includes a user terminal support unit format type. Further, the first selection condition may further include a transmission rate required by the bearer established between the user terminal and the base station, and a channel condition between the user terminal and the base station. And one or more of the current load conditions of the community Kind. ⁇ There are two ways to deal with the above two situations:
  • the first selection condition includes only the user terminal support unit format type.
  • the base station selects a unit format that the user terminal can support from the plurality of unit formats according to the user terminal support unit format type.
  • the user terminal support unit format type is a unit format that the user terminal can support, for example, there are two unit formats, and one is a PDCP PDU format in the LTE system (referred to as a first format, and the following description replaces the PDCP in the LTE system with the first format).
  • the PDU format the other is the PDCP PDU format in the LTE-A system (referred to as the second format, the following description replaces the PDCP PDU format in the LTE-A system with the second format).
  • the LTE-A system is compatible with the LTE system, there are cases where the first format and the second format exist in the LTE-A system. If the user terminal is an LTE user terminal, the second format is not supported; if the user terminal is an LTE-A user terminal, the first format and the second format are supported.
  • a unit format suitable for the user terminal can be selected.
  • the LTE-A user terminal If it is an LTE-A user terminal, you can randomly select a format. Preferably, it is determined whether the LTE-A user terminal supports one of a carrier aggregation technology and a cooperative multipoint technology. If supported, the second format is selected, otherwise the first format is selected.
  • the LTE-A user terminal can also support the number of carriers that can be aggregated and/or the number of cooperative cells, if LTE- If the A user terminal supports the number of carriers that can be aggregated and/or the number of cooperative cells is greater than the set number, the second format is selected, otherwise the first format is selected.
  • the second selection condition includes the user terminal support unit format type, and further includes a transmission rate required for the bearer established between the user terminal and the base station, a channel condition between the user terminal and the base station, and a current load condition of the cell.
  • step 400 may further include:
  • Step a400 The base station determines, according to the user terminal support unit format type, a unit format that all user terminals can support from the plurality of unit formats.
  • step b400 if the base station determines in step a400 that the user terminal supports only one unit format, step b400 does not need to be performed.
  • the first format and the second format are also described below as an example.
  • the user terminal supports the unit format type.
  • the method according to the user terminal support unit format type in the second method is similar to the method according to the user terminal support unit format type in the method 1. The difference is that if it is determined that the two formats can be selected, then one of the following conditions is determined. One or more of them are further selected.
  • the second format is selected, otherwise the first format is selected.
  • the LTE-A user terminal supports the number of carriers that can be aggregated and/or the number of cooperative cells is greater than the set number, the second format is selected, otherwise the first format is selected.
  • Condition 2 The transmission rate required for the bearer established between the user terminal and the base station.
  • the transmission rate required to check the bearer established between the user terminal and the base station is greater than the first threshold. If the second format is greater than the second format, the first format is selected.
  • Condition 3 The channel condition between the user terminal and the base station.
  • the channel condition between the user terminal and the base station meets a condition, for example, when the signal to noise ratio and/or the signal to interference and noise ratio is greater than the second threshold P ⁇ , determining that the channel condition between the user terminal and the base station satisfies the condition , thereby selecting the second format; otherwise selecting the first format.
  • Condition 4 The current load status of the community.
  • the current load condition of the cell meets the condition, for example, the current system load is less than the third threshold, and the current load condition of the cell is determined to satisfy the condition, thereby selecting the second format; otherwise, the first format is selected.
  • multiple conditions can be used in combination, for example, combining conditions 2 and 3 with condition 1, and first determining condition 2 and then determining condition 3, then in condition 2, determining user end. If the transmission rate required for the bearer established between the terminal and the base station is greater than the first threshold, the condition 3 is determined; if the condition 2 is determined, the transmission rate required for the bearer established between the user terminal and the base station is not greater than The first threshold value, directly select the first format, and no other conditions are judged.
  • the above is the PDCP PDU format in the LTE system and the PDCP PDU format in the LTE-A system.
  • This embodiment is not limited to the two formats.
  • the other formats are also applicable to the present embodiment, such as the RLC PDU format and LTE in the LTE system.
  • RLC PDU format in system A is also applicable to the present embodiment, such as the RLC PDU format and LTE in the LTE system.
  • the threshold value may be a range value when the judgment is performed, that is, the range value corresponds to a specific one or more formats. The specific selection conditions remain unchanged.
  • the base station may send the determined identifier in one of the following manners: sending the determined identifier by using a system broadcast;
  • the determined identity is placed in a reserved bit, extension bit, or control domain in the packet.
  • the user terminal after receiving the corresponding information, extracts the identifier from the information. Specifically, in which way, the base station can notify the user terminal by using a message; or the configuration is performed in advance.
  • Step 402 may further include:
  • Step 403 The user terminal performs transmission according to the unit format corresponding to the received identifier.
  • step 403 after receiving the identifier, the user terminal determines the unit format corresponding to the received identifier according to the preset correspondence between the unit format and the identifier, so as to know which unit format should be used to carry the data in the unit. Perform receiving and sending operations.
  • the correspondence between the unit format and the identifier set in advance in the user terminal is the same as the correspondence between the unit format and the identifier preset by the base station.
  • the correspondence between the unit format and the identifier may be separately stored in the base station and the user terminal; or may be stored in other entities for the base station and the user terminal to invoke.
  • the step 400 and the step 402 may further include:
  • the base station determines parameter information of the unit corresponding to the selected unit format according to the second selection condition set in advance.
  • Each unit has its own corresponding parameter information, such as the PDCP PDU format in the LTE-A system.
  • the SN length is one of the parameter information. In different cases, the length of the SN will be different.
  • the second selection condition comprises one or more of the following conditions:
  • Condition 1 The transmission rate required for the bearer established between the user terminal and the base station;
  • Condition 2 the channel condition between the user terminal and the base station
  • Condition 3 The current load status of the community.
  • condition 1, the condition 2, and the condition 3 in the second selection condition are similar to the condition 2, the condition 3, and the condition 4 in the first selection condition, respectively, but may be different in the setting of the threshold value, and the gate corresponding to the specific condition The limits are set as needed.
  • the base station sends the determined identifier and the parameter information to the user terminal, and may also be separately sent by using the sending manner described above.
  • the specific sending manner is similar to the foregoing sending manner, and details are not described herein.
  • step 403 after receiving the identifier and the parameter information, the user terminal performs a receiving operation and a sending operation on the data carried in the unit according to the unit format corresponding to the identifier and the received parameter information.
  • the base station selects one unit format from a plurality of unit formats according to a preset first selection condition; and the base station according to the preset unit format and the identifier corresponding to the identifier And determining, by the base station, the identifier corresponding to the selected unit format, where the base station sends the determined identifier to the user terminal, where the user terminal is configured to perform transmission according to the unit format corresponding to the identifier. Since the base station can indicate which cell format the user terminal operates, the sender and the receiver operate in the same unit format, thereby improving the success rate of data transmission and the efficiency of data transmission, thereby further improving resource utilization of the system. The rate and user experience reduce the burden on the system. It is apparent that those skilled in the art can make various modifications and variations to the invention without departing from the spirit and scope of the invention. Thus, it is intended that the present invention cover the modifications and the modifications of the invention.

Description

一种单元格式的指示方法、 系统和装置 本申请要求在 2009年 3月 4日提交中国专利局、 申请号为 200910078850.2 发明名称为"一种单元格式的指示方法、 系统和装置"的中国专利申请的优先 权。
技术领域
本发明涉及无线通信技术, 特别涉及一种单元格式的指示方法、 系统和 装置。 背景技术
当前 LTE ( Long Term Evolution, 长期演进) 系统的协议栈结构, 如图 1 所示。
图 1 中, LTE 系统包括 UE (用户终端)、 eNB (基站) 和 MME ( Mobility Management Entity , 移动性管理实体)。
LTE系统协议栈结构包括: NAS ( Non-Access Stratum, 非接入)层; RRC ( Radio Resource Control,无线资源控制)层; PDCP ( Packet Data Convergence Protocol, 分组数据聚合协议)层; RLC ( Radio Link Control无线链路控制) 层; MAC ( Media Access Control, 媒体接入控制层)和 PHY ( Physical, 物理) 层。
其中, UE和 eNB的协议栈从垂直方向上可以分为用户面和控制面。 控 制面用于传输信令和处理信令, 即信令承载。 用户面用于传输数据和处理数 据, 即数据承载。
在需要发送数据时, 将信令和数据都置于单元中的特定位置, 然后每一 层都进行封装。
以 PDCP层为例:
用户面的 PDCP层主要用来对接收到的数据包(即用户数据)进行头压 缩 (或解头压缩)操作、 加密 (或解密)操作。 控制面的 PDCP层主要用来 对接收到的数据包(即控制信令)进行加密(或解密)、 完整性保护 (或完整性 验证)操作。 为了完成头压缩、 加密和完整性保护等功能, PDCP将从高层收到的需要 传输的数据包(即高层的单元)做相应处理然后加上 PDCP协议头,形成 PDCP 层的数据包(即 PDCP层的单元), 并发送给低层。
目前的系统中, 单元格式只有一种, 这样发送方只有采用这种单元格式 进行发送操作, 而接受方在收到对方发送的信息后, 同样采用这种单元格式, 对承载的数据进行接收操作就可以了。
但是随着通信技术的发展, 一种单元格式显然无法满足当前的需要, 如 果系统中有多种单元格式, 接收方很难知道发送方采用什么单元格式进行发 送操作, 如果接收方采用与发送方不同的单元格式, 会造成接受失败。
综上所述, 目前的系统中, 对于多种单元格式的情况, 发送方和接收方 之间很难采用相同的单元格式进行操作, 从而降低了数据传输的效率。 发明内容
本发明实施例提供一种单元格式的指示方法、 系统和装置, 对于多种单 元格式的情况, 能够让发送方和接收方之间采用相同的单元格式进行操作, 从而提高了数据传输的效率。
本发明实施例提供的一种单元格式的指示方法, 包括:
基站根据预先设定的第一选择条件, 从多个单元格式中选择一种单元格 式;
所述基站 居预先设定的单元格式和标识的对应关系, 确定选择的单元 格式对应的标识;
所述基站向用户终端发送确定的标识, 用于指示所述用户终端才艮据所述 标识对应的单元格式进行传输。
本发明实施例提供的一种通信系统包括: 基站, 用于根据预先设定的第一选择条件, 从多个单元格式中选择一种 单元格式, 根据预先设定的单元格式和标识的对应关系, 确定选择的单元格 式对应的标识, 并发送确定的标识;
用户终端, 用于根据收到的标识对应的单元格式进行传输。
本发明实施例提供的一种基站包括:
选择模块, 用于根据预先设定的第一选择条件, 从多个单元格式中选择 一种单元格式
标识确定模块, 用于根据预先设定的单元格式和标识的对应关系, 确定 选择的单元格式对应的标识;
发送模块, 用于向用户终端发送确定的标识, 用于指示所述用户终端根 据所述标识对应的单元格式进行传输。
本发明实施例基站根据预先设定的第一选择条件, 从多个单元格式中选 择一种单元格式; 所述基站根据预先设定的单元格式和标识的对应关系, 确 定选择的单元格式对应的标识; 所述基站向用户终端发送确定的标识, 用于 指示所述用户终端 居所述标识对应的单元格式进行传输。 由于基站能够指 示用户终端采用哪种单元格式进行操作, 保证发送方和接收方之间釆用相同 的单元格式进行操作, 从而提高了数据传输的成功率以及数据传输的效率, 进一步提高了系统的资源利用率和用户体验, 减轻了系统的负担。 附图说明
图 1为 LTE系统的协议栈结构;
图 2为本发明实施例通信系统的结构示意图;
图 3为本发明实施例基站的结构示意图;
图 4为本发明实施例单元格式的指示方法流程示意图。 具体实施方式
本发明实施例基站根据预先设定的第一选择条件, 从多个单元格式中选 择一种单元格式, 并将选择的单元格式对应的标识, 发送给用户终端, 用于 指示用户终端根据标识对应的单元格式进行传输。 由于基站能够指示用户终 端采用哪种单元格式进行操作 , 发送方和接收方之间采用相同的单元格式进 行操作, 从而提高了数据传输的成功率以及数据传输的效率。
下面结合说明书附图对本发明实施例作进一步详细描述。
如图 2所示, 本发明实施例通信系统包括: 基站 10和用户终端 20。
基站 10, 用于根据预先设定的第一选择条件, 从多个单元格式中选择一 种单元格式, 根据预先设定的单元格式和标识的对应关系, 确定选择的单元 格式对应的标识 , 并发送确定的标识。
用户终端 20, 用于根据收到的标识对应的单元格式进行传输。
其中, 用户终端 20在收到标识后, 根据预先设定的单元格式和标识的对 应关系, 确定收到的标识对应的单元格式, 从而能够知道应该采用哪种单元 格式对单元中承载的数据进行接收操作和发送操作。
用户终端 20中预先设定的单元格式和标识的对应关系与基站 10预先设 定的单元格式和标识的对应关系相同。
在具体实施过程中, 单元格式和标识的对应关系可以分别存储到基站 10 和用户终端 20 中; 也可以存储到其他实体中, 供基站 10和用户终端 20调 用。
单元格式和标识的对应关系并不是不变的, 根据需要可以进行设置。 如图 3 所示, 本发明实施例的基站包括: 选择模块 100、 标识确定模块
110和发送模块 120。
选择模块 100, 用于根据预先设定的第一选择条件, 从多个单元格式中 选择一种单元格式。
其中, 第一选择条件包括用户终端支持单元格式类型, 进一步的, 第一 选择条件还可以包括用户终端和基站之间建立的承载所需的传输速率, 用户 终端和基站之间的信道状况以及小区当前的负荷状况中的一种或多种。 根据 上述两种情况分别有两种处理方式: 方式一、 第一选择条件只包括用户终端支持单元格式类型, 则选择模块
100根据用户终端支持单元格式类型, 从多个单元格式中选择一种用户终端 能够支持的单元格式。
用户终端支持单元格式类型也就是用户终端能够支持的单元格式, 比如 有两种单元格式, 一种是 LTE系统中 PDCP PDU格式(简称第一格式, 下面 描述都以第一格式代替 LTE系统中 PDCP PDU格式), 另一种是 LTE-A系统 中的 PDCP PDU格式(简称第二格式, 下面描述都以第二格式代替 LTE-A系 统中 PDCP PDU格式) 。
由于 LTE-A系统能够兼容 LTE系统, 所以会出现 LTE-A系统中存在第一 格式和第二格式的情况。 而如果用户终端是 LTE用户终端, 则不支持第二格 式; 如果用户终端是 LTE-A用户终端, 则支持第一格式和第二格式。
这样根据用户终端支持单元格式类型, 就可以选择一种用户终端适合的 单元格式。
如果是 LTE-A 用户终端, 可以随机选择一个格式。 较佳的, 在确定 LTE-A用户终端是否支持载波聚合 ( CA )技术和合作多点 (CoMP )技术中 的一种, 如果支持, 则选择第二格式, 否则选择第一格式。
在确定 LTE-A用户终端支持载波聚合技术和合作多点技术中的一种后, 还可以在查看的 LTE-A用户终端支持可聚合的载波数目和 /或可合作的小区 数, 如果 LTE-A用户终端支持可聚合的载波数目和 /或可合作的小区数大于设 定的数目, 则选择第二格式, 否则选择第一格式。
方式二、 第一选择条件包括用户终端支持单元格式类型外, 还包括用户 终端和基站之间建立的承载所需的传输速率, 用户终端和基站之间的信道状 况以及小区当前的负荷状况中的一种或多种, 则选择模块 100根据用户终端 支持单元格式类型, 从多个单元格式中确定所有用户终端能够支持的单元格 式, 根据用户终端和基站之间建立的承载所需的传输速率, 用户终端和基站 之间的信道状况以及小区当前的负荷状况中的一种或多种条件, 从确定的所 有用户终端能够支持的单元格式中, 选择一种单元格式。 在具体实施过程中, 如果选择模块 100确定用户终端只支持一种单元格 式, 则不需要再根据用户终端和基站之间建立的承载所需的传输速率, 用户 终端和基站之间的信道状况以及小区当前的负荷状况中的一种或多种条件, 确定单元格式。
下面还以第一格式和第二格式为例进行说明。
条件 1、 用户终端支持单元格式类型。
其中, 方式二中根据用户终端支持单元格式类型进行选择与方式一中的 根据用户终端支持单元格式类型进行选择的过程类似, 区别在于如果确定能 够选择两种格式, 则再根据下列条件中的一种或多种进行进一步选择。
比如: 在确定 LTE-A用户终端支持载波聚合技术和合作多点技术中的一 种时, 选择第二格式, 否则选择第一格式。
进一步的, 在 LTE-A用户终端支持可聚合的载波数目和 /或可合作的小区 数大于设定的数目时, 选择第二格式, 否则选择第一格式。
条件 2、 用户终端和基站之间建立的承载所需的传输速率。
具体的, 查看用户终端和基站之间建立的承载所需的传输速率是否大于 第一门限值, 如果大于选择第二格式, 否则选择第一格式。
条件 3、 用户终端和基站之间的信道状况。
具体的, 查看用户终端和基站之间的信道状况是否满足条件, 比如在信 噪比和 /或信干噪比大于第二门限值时, 确定用户终端和基站之间的信道状 况满足条件, 从而选择第二格式; 否则选择第一格式。
条件 4、 小区当前的负荷状况。
具体的, 查看小区当前的负荷状况是否满足条件, 比如当前系统的负荷 小于第三门限制, 确定小区当前的负荷状况满足条件, 从而选择第二格式; 否则选择第一格式。
在具体实施过程中, 可以将多个条件结合使用, 比如将条件 2和 3与条 件 1结合使用, 并且先判断条件 2再判断条件 3, 则条件 2中, 在确定用户终 端和基站之间建立的承载所需的传输速率大于第一门限值时, 再进行条件 3 的判断; 如果条件 2 中, 确定用户终端和基站之间建立的承载所需的传输速 率不大于第一门限值, 直接选择第一格式, 不再进行其他条件的判断。
其他条件的组合方式于上述的方式类似, 不再赘述。
上面是以 LTE系统中 PDCP PDU格式和 LTE-A系统中的 PDCP PDU格 式, 本实施例并不限于这两种格式, 其他格式也同样适用本实施例, 比如 LTE系统中 RLC PDU格式和 LTE-A系统中的 RLC PDU格式。
需要说明的是, 上面是以两种格式为例进行说明, 如果存在至少三种格 式, 则在进行判断时, 门限值可以是一个范围值, 即范围值对应具体的一种 或多种格式, 具体的选择条件不变。
标识确定模块 110, 用于根据预先设定的单元格式和标识的对应关系, 确定选择模块 100选择的单元格式对应的标识。
在具体实施过程中, 单元格式和标识的对应关系可以采用数据库或文件 或其他形式进行存储。
发送模块 120, 用于向用户终端发送标识确定模块 110确定的标识, 用于 指示用户终端根据收到的标识对应的单元格式进行传输。
其中, 发送模块 120可以采用下列方式中的一种发送确定的标识: 将确定的标识通过系统广播发送;
将确定的标识置于 RRC信令中发送;
将确定的标识置于控制数据单元中发送;
将确定的标识置于数据包中的预留位、 扩展位或控制域中发送。
相应的, 用户终端接收到对应的信息后, 从信息中提取出标识。 具体采 用哪种方式可以由基站通过消息告知用户终端; 或者预先进行配置。
由于有可能出现确定的单元格式对应的单元有多种参数信息, 这时还需 要基站将参数信息告知用户终端, 则本发明实施例的基站还可以进一步包括: 参数信息确定模块 130。
参数信息确定模块 130, 用于在选择模块 100从多个单元格式中选择一种 单元格式之后, 发送模块 120发送确定的标识之前, 根据预先设定的第二选 择条件, 确定选择模块 100选择的单元格式对应的单元的参数信息。
每个单元都有各自对应的参数信息, 比如 LTE-A系统中的 PDCP PDU格 式, SN长度就为参数信息中的一种, 不同的情况 SN的长度会有所不同。
其中, 第二选择条件包括下列条件中的一种或多种:
条件 1、 用户终端和基站之间建立的承载所需的传输速率;
奈件 2、 用户终端和基站之间的信道状况;
条件 3、 小区当前的负荷状况。
第二选择条件中的条件 1、 条件 2和条件 3分别与第一选择条件中的条件 2、 条件 3和条件 4类似, 只是在门限值的设定上有可能不同, 具体条件对应 的门限值是根据需要进行设定的。
相应的, 发送模块 120将确定的标识和参数信息一起发送给用户终端, 也可以采用上面描述的发送方式分开发送, 具体发送的方式与上面描述的发 送方式类似, 不再赞述。
用户终端在收到标识和参数信息后, 根据标识对应的单元格式和收到的 参数信息对单元中承载的数据进行接收操作和发送操作。
如图 4所示, 本发明实施例单元格式的指示方法包括下列步骤: 步骤 400、基站根据预先设定的第一选择条件, 从多个单元格式中选择一 种单元格式。
步骤 401、 基站根据预先设定的单元格式和标识的对应关系, 确定选择 的单元格式对应的标识。
在具体实施过程中, 单元格式和标识的对应关系可以采用数据库或文件 或其他形式进行存储。
步骤 402、 基站向用户终端发送确定的标识, 用于指示用户终端根据收 到的标识对应的单元格式进行传输。
步骤 400 中, 第一选择条件包括用户终端支持单元格式类型, 进一步 的 , 第一选择条件还可以包括用户终端和基站之间建立的承载所需的传输速 率, 用户终端和基站之间的信道状况以及小区当前的负荷状况中的一种或多 种。 ^居上述两种情况分别有两种处理方式:
方式一、 第一选择条件只包括用户终端支持单元格式类型, 则步骤 400 中, 基站根据用户终端支持单元格式类型, 从多个单元格式中选择一种用户 终端能够支持的单元格式。
用户终端支持单元格式类型也就是用户终端能够支持的单元格式, 比如 有两种单元格式, 一种是 LTE系统中 PDCP PDU格式(简称第一格式, 下面 描述都以第一格式代替 LTE系统中 PDCP PDU格式), 另一种是 LTE-A系统 中的 PDCP PDU格式(简称第二格式, 下面描述都以第二格式代替 LTE-A系 统中 PDCP PDU格式) 。
由于 LTE-A系统能够兼容 LTE系统, 所以会出现 LTE-A系统中存在第一 格式和第二格式的情况。 而如果用户终端是 LTE用户终端, 则不支持第二格 式; 如果用户终端 LTE-A用户终端, 则支持第一格式和第二格式。
这样根据用户终端支持单元格式类型, 就可以选择一种用户终端适合的 单元格式。
如果是 LTE-A 用户终端, 可以随机选择一个格式。 较佳的, 在确定 LTE-A 用户终端是否支持载波聚合技术和合作多点技术中的一种, 如果支 持, 则选择第二格式, 否则选择第一格式。
在确定 LTE-A用户终端支持载波聚合技术和合作多点技术中的一种后, 还可以在查看的 LTE-A 用户终端支持可聚合的载波数目和 /或可合作的小区 数, 如果 LTE-A用户终端支持可聚合的载波数目和 /或可合作的小区数大于设 定的数目, 则选择第二格式, 否则选择第一格式。
方式二、 第一选择条件包括用户终端支持单元格式类型外, 还包括用户 终端和基站之间建立的承载所需的传输速率, 用户终端和基站之间的信道状 况以及小区当前的负荷状况中的一种或多种, 则步骤 400 还可以进一步包 括:
步骤 a400、 基站根据用户终端支持单元格式类型, 从多个单元格式中确 定所有用户终端能够支持的单元格式。 步骤 b400、 基站才艮据用户终端和基站之间建立的承载所需的传输速率, 用户终端和基站之间的信道状况以及小区当前的负荷状况中的一种或多种条 件, 从确定的所有用户终端能够支持的单元格式中, 选择一种单元格式。
在具体实施过程中, 如果步骤 a400中, 基站确定用户终端只支持一种单 元格式, 则不需要执行步骤 b400。
下面还以第一格式和第二格式为例进行说明。
条件 1、 用户终端支持单元格式类型。
其中, 方式二中根据用户终端支持单元格式类型进行选择与方式一中的 根据用户终端支持单元格式类型进行选择的过程类似, 区别在于如果确定能 够选择两种格式, 则再根据下列条件中的一种或多种进行进一步选择。
比如: 在确定 LTE-A用户终端支持载波聚合技术和合作多点技术中的一 种时, 选择第二格式, 否则选择第一格式。
进一步的, 在 LTE-A用户终端支持可聚合的载波数目和 /或可合作的小区 数大于设定的数目时, 选择第二格式, 否则选择第一格式。
条件 2、 用户终端和基站之间建立的承载所需的传输速率。
具体的, 查看用户终端和基站之间建立的承载所需的传输速率是否大于 第一门限值, 如果大于选择第二格式, 否则选择第一格式。
条件 3、 用户终端和基站之间的信道状况。
具体的, 查看用户终端和基站之间的信道状况是否满足条件, 比如在信 噪比和 /或信干噪比大于第二门 P艮值时, 确定用户终端和基站之间的信道状 况满足条件, 从而选择第二格式; 否则选择第一格式。
条件 4、 小区当前的负荷状况。
具体的, 查看小区当前的负荷状况是否满足条件, 比如当前系统的负荷 小于第三门限制, 确定小区当前的负荷状况满足条件, 从而选择第二格式; 否则选择第一格式。
在具体实施过程中, 可以将多个条件结合使用, 比如将条件 2和 3与条 件 1结合使用, 并且先判断条件 2再判断条件 3, 则条件 2中, 在确定用户终 端和基站之间建立的承载所需的传输速率大于第一门限值时, 再进行条件 3 的判断; 如果条件 2 中, 确定用户终端和基站之间建立的承载所需的传输速 率不大于第一门限值, 直接选择第一格式, 不再进行其他条件的判断。
其他条件的组合方式于上述的方式类似, 不再赘述。
上面是以 LTE系统中 PDCP PDU格式和 LTE-A系统中的 PDCP PDU格 式, 本实施例并不限于这两种格式, 其他格式也同样适用本实施例, 比如 LTE系统中 RLC PDU格式和 LTE-A系统中的 RLC PDU格式。
需要说明的是, 上面是以两种格式为例进行说明, 如果存在至少三种格 式, 则在进行判断时, 门限值可以是一个范围值, 即范围值对应具体的一种 或多种格式, 具体的选择条件不变。
其中, 步骤 402中, 基站可以采用下列方式中的一种发送确定的标识: 将确定的标识通过系统广播发送;
将确定的标识置于 RRC信令中发送;
将确定的标识置于控制数据单元中发送;
将确定的标识置于数据包中的预留位、 扩展位或控制域中发送。
相应的, 用户终端接收到对应的信息后, 从信息中提取出标识。 具体釆 用哪种方式可以由基站通过消息告知用户终端; 或者预先进行配置。
步骤 402之后还可以进一步包括:
步骤 403、 用户终端根据收到的标识对应的单元格式进行传输。
步骤 403 中, 用户终端在收到标识后, 根据预先设定的单元格式和标识 的对应关系, 确定收到的标识对应的单元格式, 从而能够知道应该采用哪种 单元格式对单元中承载的数据进行接收操作和发送操作。
用户终端中预先设定的单元格式和标识的对应关系与基站预先设定的单 元格式和标识的对应关系相同。
在具体实施过程中, 单元格式和标识的对应关系可以分别存储到基站和 用户终端中; 也可以存储到其他实体中, 供基站和用户终端调用。
单元格式和标识的对应关系并不是不变的 , 根据需要可以进行设置。 由于有可能出现确定的单元格式对应的单元有多种参数信息, 这时还需 要基站将参数信息告知用户终端, 则步骤 400和步骤 402之间还可以进一步 包括:
基站根据预先设定的第二选择条件, 确定选择的单元格式对应的单元的 参数信息。
每个单元都有各自对应的参数信息, 比如 LTE-A系统中的 PDCP PDU格 式, SN长度就为参数信息中的一种, 不同的情况 SN的长度会有所不同。
其中, 第二选择条件包括下列条件中的一种或多种:
条件 1、 用户终端和基站之间建立的承载所需的传输速率;
条件 2、 用户终端和基站之间的信道状况;
条件 3、 小区当前的负荷状况。
第二选择条件中的条件 1、 条件 2和条件 3分别与第一选择条件中的条件 2、 条件 3和条件 4类似, 只是在门限值的设定上有可能不同, 具体条件对应 的门限值是根据需要进行设定的。
相应的, 步骤 402 中, 基站将确定的标识和参数信息一起发送给用户终 端, 也可以采用上面描述的发送方式分开发送, 具体发送的方式与上面描述 的发送方式类似, 不再赘述。
步骤 403 中, 用户终端在收到标识和参数信息后, 根据标识对应的单元 格式和收到的参数信息对单元中承载的数据进行接收操作和发送操作。
从上述实施例中可以看出: 本发明实施例基站根据预先设定的第一选择 条件, 从多个单元格式中选择一种单元格式; 所述基站根据预先设定的单元 格式和标识的对应关系, 确定选择的单元格式对应的标识; 所述基站向用户 终端发送确定的标识, 用于指示所述用户终端根据所述标识对应的单元格式 进行传输。 由于基站能够指示用户终端采用哪种单元格式进行操作, 发送方 和接收方之间采用相同的单元格式进行操作, 从而提高了数据传输的成功率 以及数据传输的效率, 进一步提高了系统的资源利用率和用户体验, 减轻了 系统的负担。 显然, 本领域的技术人员可以对本发明进行各种改动和变型而不脱离本 发明的精神和范围。 这样, 倘若本发明的这些修改和变型属于本发明权利要 求及其等同技术的范围之内, 则本发明也意图包含这些改动和变型在内。

Claims

权 利 要 求
1、 一种单元格式的指示方法, 其特征在于, 该方法包括:
基站根据预先设定的第一选择条件, 从多个单元格式中选择一种单元格 式;
所述基站根据预先设定的单元格式和标识的对应关系, 确定选择的单元 格式对应的标识;
所述基站向用户终端发送确定的标识, 用于指示所述用户终端根据所述 标识对应的单元格式进行传输。
2、 如权利要求 1所述的方法, 其特征在于, 所述基站从多个单元格式中 选择一种单元格式包括: 所述基站根据用户终端支持的单元格式类型, 从多个单元格式中选择一 种所述用户终端能够支持的单元格式。
3、 如权利要求 1所述的方法, 其特征在于, 所述基站从多个单元格式中 选择一种单元格式包括: 所述基站根据用户终端支持单元格式类型, 从多个单元格式中确定所有 所述用户终端能够支持的单元格式;
所述基站根据用户终端和基站之间建立的承载所需的传输速率, 用户终 端和基站之间的信道状况以及小区当前的负荷状况中的一种或多种条件, 从 确定的所有所述用户终端能够支持的单元格式中, 选择一种单元格式。
4、 如权利要求 1 ~ 3任一所述的方法, 其特征在于, 所述基站根据下列 方式中的一种发送确定的标识:
将所述确定的标识信息通过系统广播发送;
将所述确定的标识信息置于无线资源控制 RRC信令中发送;
将所述确定的标识信息置于控制数据单元中发送;
将所述确定的标识信息置于数据包中的预留位、 扩展位或控制域中发 送。
5、 如权利要求 1所述的方法, 其特征在于, 所述基站从多个单元格式中 选择一种单元格式之后, 所述基站发送确定的标识之前还包括:
所述基站根据预先设定的第二选择条件, 确定选择的单元格式对应的单 元的参数信息;
所述基站确定参数信息之后还包括:
所述基站向用户终端发送确定的参数信息, 用于指示所述用户终端根据 所述标识对应的单元格式和所述参数信息进行传输。
6、 如权利要求 5所述的方法, 其特征在于, 所述第二选择条件包括下列 条件中的一种或多种:
用户终端和基站之间建立的承载所需的传输速率, 用户终端和基站之间 的信道状况以及小区当前的负荷状况。
7、 如权利要求 5或 6所述的方法, 其特征在于, 所述基站根据下列方式 中的一种发送确定的参数信息:
将所述确定的参数信息通过系统广播发送;
将所述确定的参数信息置于 RRC信令中发送;
将所述确定的参数信息置于控制数据单元中发送;
将所述确定的参数信息置于数据包中的预留位、 扩展位或控制域中发 送。
8、 一种通信系统, 其特征在于, 该通信系统包括:
基站, 用于根据预先设定的第一选择条件, 从多个单元格式中选择一种 单元格式, 根据预先设定的单元格式和标识的对应关系, 确定选择的单元格 式对应的标识 , 并发送确定的标识;
用户终端, 用于根据收到的标识对应的单元格式进行传输。
9、 一种基站, 其特征在于, 该基站包括:
选择模块, 用于根据预先设定的第一选择条件, 从多个单元格式中选择 一种单元格式
标识确定模块, 用于根据预先设定的单元格式和标识的对应关系, 确定 选择的单元格式对应的标识;
发送模块, 用于向用户终端发送确定的标识, 用于指示所述用户终端根 据所述标识对应的单元格式进行传输。
10、 如权利要求 9所述的基站, 其特征在于, 所述选择模块具体用于: 根据用户终端支持单元格式类型, 从多个单元格式中选择一种所述用户 终端能够支持的单元格式。
11、 如权利要求 9所述的基站, 其特征在于, 所述选择模块具体用于: 根据用户终端支持单元格式类型, 从多个单元格式中确定所有所述用户 终端能够支持的单元格式, 根据用户终端和基站之间建立的承载所需的传输 速率, 用户终端和基站之间的信道状况以及小区当前的负荷状况中的一种或 多种条件, 从确定的所有所述用户终端能够支持的单元格式中, 选择一种单 元格式。
12、 如权利要求 9 ~ 11 任一所述的基站, 其特征在于, 所述发送模块根 据下列方式中的一种发送确定的标识:
将所述确定的标识信息通过系统广播发送;
将所述确定的标识信息置于无线资源控制 RRC信令中发送;
将所述确定的标识信息置于控制数据单元中发送;
将所述确定的标识信息置于数据包中的预留位、 扩展位或控制域中发 送。
13、 如权利要求 9所述的基站, 其特征在于, 所述基站还包括: 参数信息确定模块, 用于在所述选择模块从多个单元格式中选择一种单 元格式之后, 所述发送模块发送确定的标识之前, 根据预先设定的第二选择 条件 , 确定所述选择模块选择的单元格式对应的单元的参数信息;
所述发送模块还用于:
向用户终端发送确定的参数信息, 用于指示所述用户终端根据所述标识 对应的单元格式和所述参数信息进行传输。
14、 如权利要求 13所述的基站, 其特征在于, 所述第二选择条件包括下 列条件中的一种或多种:
用户终端和基站之间建立的承栽所需的传输速率, 用户终端和基站之间 的信道状况以及小区当前的负荷状况。
15、 如权利要求 13或 14所述的基站, 其特征在于, 所述发送模块根据 下列方式中的一种发送确定的参数信息:
将所述确定的参数信息通过系统广播发送;
将所述确定的参数信息置于 RRC信令中发送;
将所述确定的参数信息置于控制数据单元中发送;
将所述确定的参数信息置于数据包中的预留位、 扩展位或控制域中发
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