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WO2009059460A1 - Procédé et dispositif de planification de ressource entre différents systèmes tdd - Google Patents

Procédé et dispositif de planification de ressource entre différents systèmes tdd Download PDF

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Publication number
WO2009059460A1
WO2009059460A1 PCT/CN2007/003161 CN2007003161W WO2009059460A1 WO 2009059460 A1 WO2009059460 A1 WO 2009059460A1 CN 2007003161 W CN2007003161 W CN 2007003161W WO 2009059460 A1 WO2009059460 A1 WO 2009059460A1
Authority
WO
WIPO (PCT)
Prior art keywords
tdd system
tdd
preamble sequence
sub
microframe
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN2007/003161
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English (en)
French (fr)
Inventor
Dong Li
Liyu Cai
Hongwei Yang
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nokia Shanghai Bell Co Ltd
Alcatel Lucent SAS
Original Assignee
Alcatel Lucent Shanghai Bell Co Ltd
Alcatel Lucent SAS
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Alcatel Lucent Shanghai Bell Co Ltd, Alcatel Lucent SAS filed Critical Alcatel Lucent Shanghai Bell Co Ltd
Priority to PCT/CN2007/003161 priority Critical patent/WO2009059460A1/zh
Priority to JP2010532400A priority patent/JP5366962B2/ja
Priority to KR1020107012203A priority patent/KR101336686B1/ko
Priority to EP07816773.1A priority patent/EP2209224A4/en
Priority to US12/741,846 priority patent/US20100290370A1/en
Priority to CN200780101331.2A priority patent/CN101843009B/zh
Publication of WO2009059460A1 publication Critical patent/WO2009059460A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B7/00Radio transmission systems, i.e. using radiation field
    • H04B7/24Radio transmission systems, i.e. using radiation field for communication between two or more posts
    • H04B7/26Radio transmission systems, i.e. using radiation field for communication between two or more posts at least one of which is mobile
    • H04B7/2643Radio transmission systems, i.e. using radiation field for communication between two or more posts at least one of which is mobile using time-division multiple access [TDMA]
    • H04B7/2656Radio transmission systems, i.e. using radiation field for communication between two or more posts at least one of which is mobile using time-division multiple access [TDMA] for structure of frame, burst
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00Arrangements affording multiple use of the transmission path
    • H04L5/14Two-way operation using the same type of signal, i.e. duplex
    • H04L5/1469Two-way operation using the same type of signal, i.e. duplex using time-sharing
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00Arrangements affording multiple use of the transmission path
    • H04L5/0001Arrangements for dividing the transmission path
    • H04L5/0003Two-dimensional division
    • H04L5/0005Time-frequency
    • H04L5/0007Time-frequency the frequencies being orthogonal, e.g. OFDM(A) or DMT
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00Arrangements affording multiple use of the transmission path
    • H04L5/003Arrangements for allocating sub-channels of the transmission path
    • H04L5/0037Inter-user or inter-terminal allocation
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00Arrangements affording multiple use of the transmission path
    • H04L5/14Two-way operation using the same type of signal, i.e. duplex
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00Arrangements affording multiple use of the transmission path
    • H04L5/14Two-way operation using the same type of signal, i.e. duplex
    • H04L5/143Two-way operation using the same type of signal, i.e. duplex for modulated signals
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W72/00Local resource management
    • H04W72/04Wireless resource allocation
    • H04W72/044Wireless resource allocation based on the type of the allocated resource
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W72/00Local resource management
    • H04W72/12Wireless traffic scheduling

Definitions

  • the present invention relates to time-frequency resource scheduling between wireless communication systems that can meet the compatibility requirements of existing TDD systems while reducing the transmission latency of new TDD systems.
  • Frequency Division Duplex FDD
  • TDD Time Division Duplex
  • the time allocation ratio of uplink and downlink can be flexibly adjusted to adapt to the asymmetric business.
  • ⁇ TDD systems do not require paired wireless bandwidth allocations like FDD systems, which simplifies the requirements for wireless spectrum allocation;
  • the transceiver does not work at the base station or on the mobile station side, thus simplifying the system hardware design complexity.
  • Fig. 1 shows a frame structure of a conventional TDD radio system such as IEEE802.16e. As shown in Fig. 1, each frame appears as a time period of 5 ms in time, which is divided into three parts: a preamble portion, a downlink sub-frame, and an uplink sub-frame.
  • the waiting time is defined as the one-way transmission time between a packet on the transmitter side ready to transmit and when it is received on the receiver side.
  • the waiting time is relatively long, and it is difficult to meet the requirements in the case of broadband.
  • a method for scheduling resources between a first TDD system and a second TDD system is proposed, and a frame used by the first TDD system for communication includes a preamble sequence, an uplink subframe, and a downlink.
  • Sub-frame the method comprising the steps of: allocating time and frequency resources for service data of the first system and the second TDD system according to the service parameters of the first TDD system and the service parameters of the second TDD system; and the first TDD system
  • the coded modulated data stream of the second TDP system is mapped to the corresponding allocated time and frequency resources.
  • the method further comprises the step of constructing a preamble sequence of the second system based on a preamble sequence of the first TDD system.
  • the allocating step comprises: dividing a frame of the second TDD system into a preamble sequence and a plurality of microframes, each microframe comprising a sub-microframe for the uplink and a downlink for the downlink a sub-microframe; the subcarrier of the first TDD system is set in frequency at a central portion of the frequency band allocated to the second TDD system, one side of the spectrum or other locations; encoding of the first TDD system and the second TDD system The modulated data stream is allocated to the corresponding time and frequency resources.
  • time-frequency resources that are assignable to the first TDD system and to the second TDD system are allocated to the one of the first TDD system and the second TPD system that has a larger traffic load.
  • the subcarriers are reserved between the spectrum of the first TDD system and the -TDD system as guard intervals.
  • each downlink sub-microframe includes a portion for transmitting micro-frame composition information.
  • an apparatus for scheduling resources between a first TDD system and a second TDD system includes a preamble sequence, an uplink subframe, and a downlink a sub-frame
  • the device includes: a resource allocation and scheduling device, and allocating time and frequency resources for service data of the first TDD system and the second TDD system according to the service parameter of the first TDD system and the service parameter of the second TDD system
  • a resource mapping device that maps the coded modulated data streams of the first TDD system and the second TDD system to respective allocated time and frequency resources.
  • the device further comprises a preamble generating device, based on a preamble of the first TDD system Columns to construct the preamble sequence of the second system.
  • the resource allocation and scheduling apparatus is formed to include: means for dividing a frame of the second TDD system into a preamble sequence and a plurality of micro-frames in time, each micro-frame packet antagonizing the sub-micro of the uplink
  • the frame and the sub-microframe for the downlink set the subcarriers of the first TDD system in frequency to the central portion of the frequency band allocated to the second TDD system, on one side of the spectrum or at other locations; the TDD system
  • the resource allocation and scheduling apparatus is configured to allocate time-frequency resources that are assignable to the first TDD system and to the second TPD system to the first TDD system and the second TDD system. That one.
  • said resource allocation and scheduling means is configured to allocate at least a portion of the remaining subcarriers to the one of the first TDD system and the second TDD system having a greater traffic load.
  • the uplink and downlink time-frequency resource allocation scheme of the TDD system described above supports the existing narrowband TDD system and the new broadband TDD' system to work in parallel on the same radio frequency carrier, specifically, the time of the uplink of the existing system therein
  • the frequency resource allocation conforms to the existing structure of the structure, and the new TDD system greatly improves the system delay performance due to the shortening of the frame duration.
  • the system can adjust the size of the traffic load between the m3 ⁇ 4 f system and the 3 ⁇ 4 system, and dynamically adjust the video resources to 5 to ⁇ , so that the existing narrowband TDD system can smoothly transition to the new TDD broadband system.
  • the design of the preamble sequence described above which is based on the preamble sequence of the existing narrow TDD system, is extended by effective frequency domain, thereby generating a preamble sequence of a new TDD 'broadband system', which can simultaneously It ensures the backwards of the existing TDD narrowband system and the synchronization between the multiple base station systems, as well as the synchronization between the new TDD broadband systems and between the new TDD broadband system and the existing TDD narrowband system.
  • the method and system according to the present invention can perform resource scheduling according to respective service loads in different systems, such as IEEE 3 ⁇ 4) 2.11 e 'and 802.11m, which smoothes the existing ⁇ B3 to broadband system.
  • ⁇ RTIgt is a block diagram showing the structure of an apparatus for resource scheduling between different systems according to an embodiment of the present invention
  • FIG. 3 shows a schematic diagram of a frame structure proposed in accordance with an embodiment of the present invention
  • FIG. 4 is a diagram illustrating how a frame structure is compatible with the frame structure illustrated in FIG. 1 and resource scheduling according to a traffic load of a corresponding system according to an embodiment of the present invention
  • FIG. 5 is a diagram illustrating a frame structure diagram and resource scheduling compatible with the frame structure illustrated in FIG. 1 and performing resource scheduling according to a service load of a corresponding system according to an embodiment of the present invention
  • FIG. 6 is a flow chart showing a method of resource scheduling between different TDD systems in accordance with an embodiment of the present invention. detailed description
  • root dance 'present' in the next real 1 ⁇ 4 3 ⁇ 4 £ between different TDD system into resources lli ⁇ 3 ⁇ 4 of the circumference apparatus comprising: preamble sequence generation unit 10 for generating a preamble sequence; resource allocation and The scheduling unit 20 is configured to perform resource allocation and scheduling on the service data from the first system according to the uplink/downlink service parameters; and the resource mapping unit 30, configured to use the number of services from the system and the second system. Map to the appropriate resource.
  • the resource allocation and scheduling unit 20 described above will have a preamble sequence as shown in FIG. + Uplink subframe '+The frame structure of the downlink subframe is divided into a preamble sequence ⁇ N microframes (N is greater than or equal to 2), each of the plurality of microframes includes a downlink Sub-microframe and one uplink sub-microframe.
  • N is greater than or equal to 2
  • each of the plurality of microframes includes a downlink Sub-microframe and one uplink sub-microframe.
  • the number of microframes contained in a frame can be parameterized and dynamically adjusted.
  • the ratio of the uplink sub-microframes to the downlink sub-microframes in one microframe can be configured and adjusted.
  • each microframe further includes, in the downlink sub-microframe, information indicating how the micro-frame is framed, so that the receiving end knows the composition information of the micro-frame to perform data detection and reception.
  • the preamble sequence serves as a training sequence, that is, for frame synchronization and time/frequency synchronization and compensation between the transmitting end and the receiving end, and cell identification.
  • a training sequence that is, for frame synchronization and time/frequency synchronization and compensation between the transmitting end and the receiving end, and cell identification.
  • FIGS. 4 and 5 are diagrams illustrating how a frame structure is compatible with the frame structure shown in FIG. 1 according to an embodiment of the present invention. And a schematic diagram of resource scheduling according to the service load of the corresponding system.
  • N micro-frames
  • IEEE802.16e is used as a narrowband system
  • IEEE802.16m is used as a broadband system.
  • the second system that is, an example of the second system. .
  • the preamble generating section 10 can construct a new preamble sequence according to the existing narrowband system, for example, the preamble sequence of IEEE802, 16e. Specifically, .:: placing the preamble sequence of the first system at an appropriate position (for example, a central portion, one side of the spectrum or other position) of the spectrum allocated to the second system, and one or two preamble extensions Place the remaining spectrum bits ⁇ .
  • the preamble sequence of the new TDD broadband system is designed to meet, for example, lower peak-to-average ratio (PAPR), good sub-correlation and cross-correlation property requirements, etc., so as to have greater power enhancement on the preamble sequence symbol to improve Receive performance, and the receiver makes better use of the correlation characteristics of the preamble sequence for time or frequency synchronization.
  • PAPR peak-to-average ratio
  • a new preamble sequence can be used instead of the above generated preamble sequence, or the existing preamble sequence can be modified.
  • 3 ⁇ 4 is the salary of the old ⁇ ⁇ to help the receiving end easier to frequency filter ': ; '';: Base station 3 ⁇ 4:BS )
  • the time and frequency resources can be dynamically scheduled according to the respective negatives of the first system and the second system.
  • ' Figure'' 4 shows, for example, the existing IEEEgOi 16e : system is large : the business needs to be left, this is at the beginning of TDD' ⁇ ⁇ 3 ⁇ 4, ' ⁇ 3 ⁇ 4 often; so resource ⁇ ffi and scheduling unit 20 Allocate most of the remaining resources to the existing ⁇ 802.
  • the second transmit/receive conversion of the base station is located at the 3 ⁇ 43 ⁇ 47 received location of the m-system; instead of transmitting / ⁇ in the second microframe.
  • the allocation and scheduling unit 20 allocates most of the reserved number of subcarriers to the second system, the IEEE 802.16m' system.
  • the second transmit/receive switch bit S of the base station is located at the transmit/receive switch position of the new system, that is, the transmit/receive switch position of the second micro frame '"' : ' Then, After the resource allocation and scheduling for the traffic of the first system and the second system, the resource mapping unit '3Q maps the allocated time and frequency resources' corresponding service data from the *selling 53 ⁇ 4 to the different TDD systems. Dynamic resource scheduling between '''''''
  • step S10 the preamble sequence generating section 10 constructs a new wideband preamble sequence for the pilot sequence extension of the first system, or constructs a brand new wideband preamble without satisfying backward compatibility.
  • the sequence meets the lower PAPR and better sub-correlation and cross-correlation properties.
  • the resource allocation and scheduling unit 20 allocates and schedules resources for the service data of the first system and the second system according to the uplink/downlink service parameters, such as the traffic load of the first system and the traffic load of the second system.
  • the existing IEEE802.16e and the new broadband 802.16 ⁇ 1 system as an example, as mentioned above, at the beginning of the new broadband system, the existing IEE.E802.16e system has more than 3 ⁇ 4
  • the industry demand for example, is greater than a predetermined threshold, so the resource allocation and scheduling unit 20 allocates most of the reserved resources to the existing IEEE 802.16e system, the first system.
  • the resource allocation and scheduling unit 20 allocates most of the reserved subcarriers to the first The second system, the IEEE 802.16m system.
  • the semaphore unit '30 At step ' ⁇ '30, the semaphore unit '30; the resource map 3 3'0 ⁇ ⁇ 3 ⁇ 3 ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ , 'There are actual tactics to 3 ⁇ 4 different TT0D 3 ⁇ 4: 3 ⁇ 4 mobile ⁇ scheduling. ':; : .
  • the method and system of the present invention can be used in a wood-based system, such as IEEE 02.11e and 802.11m, in accordance with the load of the industry, which is used for the existing 3 ⁇ 4 ⁇ 3 to 4
  • the smooth transition of the system is useful.
  • ''; ⁇ '''' :: .'':' The above description is only used to implement the embodiment of the invention, : the domain technician should have a solution : ' can be modified without departing from the scope of this 3 ⁇ 4 ⁇ 4 ⁇ 4
  • the partial replacement, ⁇ is in the scope of the invention defined by the Li, and therefore, the scope of protection of the invention : should be protected by the requirements of the requirements : :

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Time-Division Multiplex Systems (AREA)

Description

在不同的 TDD系统之间调度资源的方法和设备 技术领域
本发明涉及一种在无线通信系统之间的时频资源调度, 能够在减小新的 TDD系统的传输等待时间的同时满足对现有 TDD系统的兼容要求。 背景技术
在无线通信系统中, 频分双工 (FDD)和时分双工 (TPD)是主要的两种双 工方式。 与 FDD系统相比, TOP系统具有一些独特的优点如下所示:
驪 在 TDD系统中, 可以灵活的调整上下行的时间分配比例, 以适应上下 行非对称的业务;
■ TDD系统不像 FDD系统那样需要成对的无线带宽分配, 这一点简化了 对无线频谱分配的要求;
騸 在 TDD系统中, 无论在基站还是在移动台侧, 收发信机不同时工作, 因此, 简化了系统硬件设计 ^复杂度;
■ 在 TDD系统中, 由于上卞行频率严格一致, 因此可以利用上下行信道 的对称性进行需要闭环处理的一些操作。
由于 TDD系统的这些优点, TDD方式在一些无线移动通信系统中得到了应 用, 例如 WiMAX系统等。 但在 TOO系统中, 由于上下行的间隔传输, 使得 TDD 方式具有等待时间比较长的问题, 这造成 7在空中接口上的控翁信令和反 馈传输等的延迟。但是随着下一代宽带无线通信技术的发展, 需要减小等待时间 并且能够兼容现有的窄带无线系统的宽带无线系统。 ' . 图 1示出了传统的 TDD无线系统例如 IEEE802.16e的帧结构。如图 1所示, 每帧在时间上表现为 5ms 的时间段, 它被划分成前导部分、 下行链路子帧和上 行链路子帧三个部分。众所周知, 等待时间被定义为一个分组在发射机侧准备好 发送时到其在接收机侧接收好时之间的单向传输时间。从图 1中可以看出, 根据 常规的 TDD无线系统, 等待时间比较长, 难以满足宽带情况下的要求。
因此, 需要一种既能够减少等待时间又能够满足后向兼容的无线通信技术。 发明内容 鉴于现有技术中的上述问题,完成了本发明。本发明的目的是提供一种在不 同的 TDD系统之间调度资源的方法和设备, 它能够减小分组传输的等待时间, . 并且能够满足后向兼容的要求。
在本发明的一个方面,提出了一种在第一 TDD系统和第二 TDD系统之间调 度资源的方法, 第一 TDD系统进行通信所用的帧包括前导序列、 上行链路子帧 和下行链路子帧,所述方法包括步骤:根据第一 TDD系统的业务参数和第二 TDD 系统的业务参数,为第一 系统和第二 TDD系统的业务数据分配时间和频率 资源;以及将第一 TDD系统和第二 TDP系统的编码调制数据流映射给相应的所 分配的时间和频率资源上。
优选地, 所述的方法还包括根据第一 TDD系统的前导序列来构造第二系统 的前导序列的步骤。
优选地, 所述分配步骤包括: 在时间上将第二 TDD系统的帧划分成前导序 列和多个微帧, 每个微帧包括用于上行链路的子微帧和用于下行链路的子微帧; 在频率上将第一 TDD系统的子载波设置在所分配给第二 TDD系统的频段的中央 部分,频谱的一侧或者其他位置;将第一 TDD系统和第二 TDD系统的编码调制 数据流分配给相应的时间和频率资源。
'优选地,将那些可分配给第一 TDD系统也可分配给第二 TDD系统的时间频 率资源分配给第一 TDD系统和第二 TPD系统中业务负载较大的那个。
优选地,在第一 TDD系统和第 - TDD系统的频谱之间保留 子载波,作为 保护间隔。
优选地, 每个微帧中的上行链路子微帧和下行链路子微帧的比例是可调的。 优选地, 每帧中包含的微帧的数目是可调的。 :' 优选地, 每个下行链路子微帧包括用于传输微帧构成信息的部分。
在本发明的另一方面,提出了一种在第一 TDD系统和第二 TDD系统之间调 度资源的设备, 第一 TDD系统进行通信所用的帧包括前导序列、 上行链路子帧 和下行链路子帧, 所述设备包括: 资源分配和调度装置, 根据第一 TDD系统的 业务参数和第二 TDD系统的业务参数, 为第一 TDD系统和第二 TDD系统的业 务数据分配时间和频率资源; 以及资源映射装置, 将第一 TDD系统和第二 TDD 系统的编码调制数据流映射给相应的所分配的时间和频率资源上。 '
优选地, 所述设备还包括前导序列产生装置, 根摁第一 TDD系统的前导序 列来构造第二系统的前导序列。
优选地, 所述资源分配和调度装置形成为包括: 在时间上将第二 TDD系统 的帧划分成前导序列和多个微帧的装置,每个微帧包拮用于上行链路的子微帧和 用于下行链路的子微帧 在频率上将第一 TDD系统的子载波设置在所分配给第 二 TDD系统的频段中央部分,频谱的一侧或者其他位置的装置;将第 TDD系 统和第二 TDD系统的编码调制数据流分配给相应的时间和频率资源的装置。
优选地, 所述资源分配和调度装置形成为将那些可分配给第一 TDD系统也 可分配给第二 TPD系统的时间频率资源分配给第一 TDD系统和第二 TDD系统 中业务负载较大的那个。
优选地,所述资源分配和调度装置形成为将其余的子载波的至少一部分分配 给第一 TDD系统和第二 TDD系统中业务负载较大的那个。
上述的 TDD系统的上下行时频资源分配方案,支持现有的窄带 TDD系统和 新的宽带 TDD'系统在同一射频载波上并行工作, 具体的说, 使得其中的现有系 统的上卡行时频资源分配符合萁已有的 ^结构定爻, ¾时新的 TDD系统由乎帧 时长的缩短而使得其系统延迟性能大为提高。系¾可以 m¾ f系统和 ¾有系^之 间的业务负载的大小关系, '·动态调节视频资源分酉 5比 ί列,从而使 现有窄带 TDD 系统平滑过渡到新的 TDD宽带系统。
另外, 上述的前导序列的设计, 该设计在现有窄^ TDD系统的前导序列的 基础丄, 通过有效的频域扩展,' 从而产生新的 TDD'宽带系统'的前导序列, 该序 列可以同时保证对现有 TDD窄带系统的后向兼 及多基站系统间的同步, 以及 新的 TDD宽带系统之间及新的 TDD宽带系统与现有 TDD窄带系统之间的同步。
利用本发明的上述方法和系统, 不但能够减小诸如业务分组、控制信令和反 馈信息在空中接口的等待时间, 而且能够满足对现有系统的兼容要求。
另外, 根据本发明的方法和系统可以在不同的系统, 例如 IEEE¾)2.11e '和 802.11m之向按照各自的业务负载进行资源调度, 这对于现有的 ^带 ¾统到宽带 统的平滑过 有用 0' 附图说明'
从下面结合附图的详细描述中, 本发明的上述特征和优点将更明显, 其中: 图 1示出了根据瑰有技术的帧结构示意图;' ' ' ' ― 图 2示出了根据本发明实施例的在不同系统之间进行资源调度的设备的结 构框图;
• '图 3示出了根据本发明实施例所提出的帧结构的示意图;
图 4是说明根据本发明实施例的帧结构如何与图 1所示的帧结构兼容并且按 照相应系统的业务负载进行资源调度的示意图;
图 5是说明根据本发明实施例的帧结构图和与图 1所示的帧结构兼容并且按 照相应系统的业务负载进行资源调度的示意图;
图 6示出了根摁本发明实施例的在不同的 TDD系统之间进行资源调度的方 法的流程图。 具体实施方式
下面对照附图详细描述本发明的具体实施方式。
如图 2戶 f示, :根舞'本发'明实 ¼的在不同 TDD系¾£间进^资 lli周度 ¾设 备包括: 前导序列产生单元 10, 用于产生前导序列; 资源分配和调度单元 20, 用于稂据上行 /下行业务参数对来自第一' 统 第 系统的业务数据进行资源分 配和调度; 以及资源映射单元 30, 用于将 '来自第 系统和 二系统 ¾业务数瑭 映射到相应的资源上。 将在后面详细说明上述各个单元的具体操作和功能。
根据本发明的实施例, 如图 3所示, 对于纯粹的新的 TDD宽带 统,' 也就 是传输等待时间小的 TDD系统,上述的资源分配和调度单元 20将如图 1所示的 前导序列 +上行链路子帧 '+下行链路子帧的帧结构划分成前専序列屮 N个微帧 (N大于等于 2), 该多个微帧中的每个微帧都包括一个下行链路子微帧和一个 上行链路子微帧。 自然, 一帧中包含的微帧的数目是可以被参数化并且被动态调 节的。另外,一个微帧中上行链路子微帧和下行链路子微帧的比例是可以配置和 调节的。
如图 3所示,每个微帧在下行链路子微帧中还包括表示微帧如何 成 ¾徼帧 构成信息, 以便于接收端获知微帧的构成信息从而进行数据检测和接收。
前导序列充当训练序列,也就是用于发送端和接收端之间的帧同^以及时间 /频率同步和补偿, 以及小区识别。 如上所述, 由于将一个帧分成了多个微帧,' 从而大大减小了上行和下行链路的传输时间, 因此有效地提高了系统 迟性能。
图 4和图 5是说明根据本发明实施例的帧结构如何与图 1所示的帧结构兼容 并且按照相应系统的业务负载进行资源调度的示意图。在图 4和图 5中, 假设每 个帧都被划分成两个微帧 (N=2), 并且以 IEEE802.16e作为窄带系统, 即第一 系统的例子, 而以 IEEE802.16m作为宽带系统, 即第二系统的例子。 .
如图 4 所示, 前导序列产生部分 10 可以根据现有的窄带系.,统, 例如 IEEE802,16e的前导序列来扩展构造出一个新的前导序列。 具体而言,.::将第一系 统的前导序列放在所分配给第二系统的频谱的适当位置(例如中央部分, 频谱的 一侧或者其他位置), 而将一个或两个前导扩展部分放在剩余的频谱位翬。这里, 新的 TDD宽带系统的前导序列的设计要满足例如较低的峰均比 (PAPR)、 良好 的子相关及互相关特性要求等,以便于前导序列符号上有较大的功率增强从而提 高接收性能, 以及接收端更好的利用前导序列的相关特性进行时间或者频率同 步。 ·但是如果不要求两个系统之间的兼容性, 则也可以用新的前导序列来代替上 述生成的前导序列, 或者对该现有的前导序列进行修改。
" 在频域中, 以在第 统禾 土 ^^的颍^; £间¾留 手载液, ¾为薪 旧系^ 向的保 ^间 以有利于接收端更容易的进行频 滤波': ; ' ' ;: 基站 ¾:BS )"可以裉据第一系 和索二系统各自 负煢来动态地 调度时间和频率资源。 '如图'' 4 示, 例如现有的 IEEEgOi 16e:系 大 :的业 务需余, 这在 的 TDD' ^^ ^ ¾之初, '儈况 ¾常如此; 因此资源^ ffi和调 度单元 20将大部 呆留的资源分配给现有的 ΙΕΕΕ802. '系统, '即 一系统。 ' 从图 4中可以看出, 基站的第二发射 / 收转换 位于 m—系 的¾¾7接收过 ^位置; 而非索二微帧中发射 / ^^ 。 '
' '如图 5所 ¾, '€设^¾有的第一系统中具有 ^小 ¾业务需求,而¾¾二¾统 中存在较矢的业务需求,例如第二系统的业务量^于予页定的阈 'ίί', 则 ¾分配和 调度单元 20将大多'数保留的子载波分配给第二 统, 即 IEEE802.16m'系统。 '从 图 5中可以看出, 基站的第二发射 /接收转换位 S位于新系统的发射 /接收转换位 置, 也就是第二微帧的发射 /接收转换位置 ' " ' ' : ' 然后, 在为第一系统和第二系统的业务数瑭迸行了资源分配和调度之后, 资 源映射单元' 3Q将分配的时间和频率资源映射' 对应的业务数据, 从 *卖 5¾来¾ 不同 TDD系统之间的动态资源调度。 ' ' ' ' '
图 6示出了根据本发明实施例的在不同的 TDD系统之间进行资源调度的方 法的流程图。 如图 6所示, 在步骤 S10, 前导序列产生部分 10对第一系统的 导序列扩 展构造出新的宽带前导序列,或者在不需要满足后向兼容的情况下, 计构造出 全新的宽带前导序列以满足更低的 PAPR和更好的子相关性和互相关特性要求。
在步骤 S20, 资源分配和调度单元 20根据上 /下行业务参数, 例如第一系统 的业务负载和第二系统的业务负载,来为第一系统和第二系统的业务数据分配和 调度资源。例如, 以现有的 IEEE802.16e和新的宽带 ΙΕΕΕ802.16Π1系统为例, 如 上所逑 , ..在新的宽带.系统安 ^之初,:现有的 IEE.E802.16e系统具有较 ¾的业 需 求,,例如大于预定的阈值, 因此资源分配和调度单元 20将大部分保留的资源分 配给现有的 IEEE802.16e系统, 即第一系统。 当现有的第一系统中业务需求逐渐 减少而新的宽带系统的用户及其带宽需求逐渐升高之后, 例如大于预定的阈值, 资源分配和调度单元 20将大多数保留的子载波分配给第二系统,即 IEEE802.16m 系统。
—在步骤' §'30, 资 射单元 '30; 资源映射阜先 3'0将粲一 二 ¾统¾ ^码调制数据¾缺射给相应的 '所分配'的时间 '和频率资¾上, '从而实规来 ¾不同 TT0D ¾:间 ¾动 资 ϋ调度。 ' : ;: . ' '·' :' ' 利用 发明的上述 ^法和系统: 不但能够 小诸如业务分组、 Sf¾信令和反 ί 信息 ¾S中接口的等待时间,:而且'能够满足对现有系统 '的蒹容要求。 ''
另外, 粮 fe本发明的方法和系统可以在木同的系统, '例如 IEEE 02.11e 和 802.11m之间按照 自的业 负载进行¾源调虔,这对于现有的 ¾赉¾统到宽赉 系统的平滑 渡尤萁有用。 ' ' ; ― ' ' ' ' :: .' ': ' — 上面 to描逑仅用于实瑰本发明 实施方式,: 域的技术人员应该 ¾解:,'在 不脱离本 ¾¾¾范围 可修改 ¾局部替换,^ 该 于本发明的 ^利婆求来限 定的范围, 因此, 发明的保护范围 :应该以 利要求书的保护范 :围为 。 :

Claims

权利 要 求
1、一种在第一 TDD系统和第二 TDD系统之间调度资源的方法, 第一 TD1 系统进行通信所用的帧包括前导序列、上行链路子帧和下行链路子帧,所述方法 包括步骤:
根据第一 TDP系统的业务参数和第二 TDE>系统的业务参数, 为第一 TDD 系统和第二 TPD系统的业务数据分配时间和频率资源; 以及
将第一 TD0系统和第二 TD0系统的编码调制数据流映射给相应的所分配的 时间和频率资源上。
2、如权利 求 1所述的方法,还包括根据第一 TDP系统的前导序列来构造 第二系统的前导序列的步骤。
3、 如权利要求 1所述的方法, 其中, 所述分配步骤包括:
在时间上将第二 TDD系统的帧划分成前导序列和多个微帧, 每个微帧包括 用于上行链路的子微帧和用于下行链路的子微帧;
在频率上将第一 TDD系统的子载波设置在所分配 第二 TDD系统的频段的 中央部分,'频谱的一侧或者其他位置; ' '
' ―将第一 TDD系统和第二 TDD系统的编码调制数据流分配给相应的时间和频 率资源。 ' '
'
4、如权利要求 3所述的方法,其中, 将那些可分配给第一 TDD系统也可分 配给第二 TDD系统的时间频率资源分配给第一 TDD系统和第二 TDD系统中业 务负载较大的那个。
5、 如权利要求 2所述的方法, 其中在第一 TDD系统和第二 TDD系统的频 谱之间保留有子载波, 作为保护间隔。
6、 如权利要 3所述的方法, 其中每个微帧中的上行链路子微帧和下行链路 子微帧的比例是可调的。
7、 如权利要求 3所逑的方法, 其中每帧中包含的微帧的数目是可调的。
8、 如权利要求 3所述的方法, 其中每个下行链路子微帧包括用于传输微帧 构成信息的部分。
9、一种在第一 ΤΕΦ系统和第二 TDD系统之间调度资源的设备,第一 TDP 系统进行通信所用的帧包括前导序列、上行链路子帧和下行链路子帧,所述设备 包括:
资源分配和调度装置,根据第一 TDD系统的业务参数和第二 TDD系统的业 务参数,为第一 TDD系统和第二 TDD系统的业务数据分配时间和频率资源; 以 及
资源映射装置,将第一 TDD系统和第二 TDD系统的编码调制数据流映射给 相应的所分配的时间和频率资源上。
10、 如权利要求 9所述的设备, 还包括前导序列产生装置, 根据第一 TDD 系统的前导序列来构造第二系统的前导序列。 '
11、如权利要求9所述的设备,其中,所述资源分配和调度装置形成为包括: 在时间上将第二 TDD系统的帧划分成前导序列和多个微帧的装置, 每个微 帧包括一个用于上行链路的子微帧和用于下行链路的子微帧;
在频率上将第二 TDD系统的子载波设置在分配给第二 TDD系统的频段的中 奂部分, 频谱的一侧或者其他位置的装置;
将窠一 Τώθ'系统和第二 TDD系统的编 :码调制数'据 分配给相应的时 |1和频 率资源的¾置。' ' : : "":'- ": :" '";; ":
12、 如权利要求 11所述的设备, 其中, 所述资源分配和调度装置形成为将 那些可分配^ ¾·^ΤΕ>Ρ'系统也可分配给 二 TDD系统 时间频 分 15 ^第 一 TDD系统和第二 TDD系统中业务负载较大的那个。
13、 如权剁要求 11所述的 ¾ '备, 其中¾第一 TDD系统和第 TDD系统的 频谱之间保留有子载波, 作为保护间隔。
PCT/CN2007/003161 2007-11-07 2007-11-07 Procédé et dispositif de planification de ressource entre différents systèmes tdd Ceased WO2009059460A1 (fr)

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