WO2009046629A1 - Procédé et dispositif de communication - Google Patents

Procédé et dispositif de communication Download PDF

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Publication number
WO2009046629A1
WO2009046629A1 PCT/CN2008/001672 CN2008001672W WO2009046629A1 WO 2009046629 A1 WO2009046629 A1 WO 2009046629A1 CN 2008001672 W CN2008001672 W CN 2008001672W WO 2009046629 A1 WO2009046629 A1 WO 2009046629A1
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WO
WIPO (PCT)
Prior art keywords
slot
time slot
data
uplink
downlink
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/CN2008/001672
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English (en)
French (fr)
Inventor
Guangyi Liu
Lu Han
Yuhong Huang
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.)
China Mobile Communications Group Co Ltd
Original Assignee
China Mobile Communications Corp
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Publication date
Application filed by China Mobile Communications Corp filed Critical China Mobile Communications Corp
Priority to KR1020107006834A priority Critical patent/KR101160243B1/ko
Priority to JP2010525183A priority patent/JP5027928B2/ja
Priority to US12/679,876 priority patent/US8228828B2/en
Priority to CA2700870A priority patent/CA2700870C/en
Priority to KR1020127007090A priority patent/KR101261037B1/ko
Publication of WO2009046629A1 publication Critical patent/WO2009046629A1/zh
Anticipated expiration legal-status Critical
Priority to US13/462,323 priority patent/US8811239B2/en
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
    • H04L27/00Modulated-carrier systems
    • H04L27/26Systems using multi-frequency codes
    • H04L27/2601Multicarrier modulation systems
    • H04L27/2602Signal structure
    • H04L27/261Details of reference signals
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W56/00Synchronisation arrangements
    • H04W56/001Synchronization between nodes

Definitions

  • the present invention relates to a communication technology, and in particular, to a communication method and apparatus. Background technique
  • a radio frame transmitted between a terminal and a base station has a length of 10 ms.
  • Each radio frame is further divided into two halves (half-frames), each of which includes 7 subframes (also referred to as data slots) and 3 special slots.
  • LTE Type 2 TDD Long Term Evolution Type 2 wideband time division duplex
  • Each radio frame is further divided into two halves (half-frames), each of which includes 7 subframes (also referred to as data slots) and 3 special slots.
  • the system bandwidth is 20 ⁇
  • Orthogonal frequency division multiplexing symbol composition OFDM symbol length is 2048 * Ts, short CP length is 256 * Ts, long CP is 544 * Ts, the total length of each data slot is 675us (20736 * Ts)
  • the data slots can be divided into an uplink slot and a downlink slot, where each downlink slot is composed of 9 OFDM symbols under a short CP and 8 OFDM symbols at a long CP; each uplink slot is short
  • the CP consists of 9 long blocks and the long CP consists of 8 long blocks.
  • 7 data slots can be identified by #0, #1, #2, #3, #4, #5, #6, or TS0, TS1, TS2, TS3, TS4, TS5, TS6 are identified, where #0 corresponds to TS0, ..., #6 corresponds to TS6. #0 can only be used for downlink.
  • 3 special time slots include DwPTS (downlink special Time slot), GP (protected time slot) and UpPTS (uplink special time slot), where DwPTS is a downlink special time slot, which is located after TS0 and has a length of 2572*Ts, including one a CP (length 524*Ts) and an OFDM symbol (length 2048*Ts) for carrying a primary synchronization channel (P-SCH) for cell search, downlink synchronization, etc., and a secondary synchronization channel ( S-SCH is transmitted in the last symbol of data slot #0; UpPTS is an uplink special time slot, placed after the GP, before TS1, the length is 4340*Ts, to achieve uplink random access, etc.; Gap, length 50us (1536*Ts), no data signal transmission, placed in the special uplink The front of the gap UpPTS is used to prevent interference of the downlink special time slot to the uplink special time slot.
  • DwPTS downlink special Time slot
  • GP protected
  • the embodiments of the present invention provide a communication method and apparatus, which can solve the problem of limiting the transmission efficiency of information such as BCH in #0 in the prior art, and the problem that the DwPTS interferes with the uplink time slot.
  • the embodiment of the present invention provides a communication method, which is applied to a long-term evolution type 2 broadband time division duplex mobile communication system, and includes:
  • the first communication device sends a radio frame to the second communication device, where each field of the radio frame includes a data slot and a downlink special slot, where the data slot is used for data transmission; Carrying synchronization information; the data slot is shorter than the original data slot by the first time slot.
  • the embodiment of the present invention further provides a communication apparatus, which is applied to a long-term evolution type 2 broadband time division duplex mobile communication system, and includes:
  • a sending unit configured to send a radio frame, where each field of the radio frame includes a data slot and a downlink special slot, where the data slot is used for data transmission; and the downlink special slot is used to carry synchronization information.
  • the data slot is shorter than the original data slot by the first time slot.
  • the first communication device sends a radio frame to the second communication device, where each field of the radio frame includes a data slot and a downlink special slot, where the data slot is used for data transmission; Carrying synchronization information; the data slot is no longer than 667 us.
  • the half frame of the radio frame further includes an uplink special time slot, and the uplink special time slot Not longer than 116.67us.
  • the subframe of the radio frame further includes a guard slot, the guard slot is used to prevent interference between the uplink and the downlink; and the length of the guard slot is greater than 50 us.
  • the embodiment of the present invention further provides a communication apparatus, which is applied to a long-term evolution type 2 broadband time division duplex mobile communication system, and includes a sending unit, configured to send a radio frame, where each field of the radio frame includes a data slot and a downlink special slot, where the data slot is used for data transmission; the downlink special slot is used to carry synchronization information; and the data slot is not longer than 667 us.
  • a communication apparatus which is applied to a long-term evolution type 2 broadband time division duplex mobile communication system, and includes a sending unit, configured to send a radio frame, where each field of the radio frame includes a data slot and a downlink special slot, where the data slot is used for data transmission; the downlink special slot is used to carry synchronization information; and the data slot is not longer than 667 us.
  • the interval between the DwPTS and the UpPTS is reduced, thereby reducing the interference of the DwPTS to the uplink time slot; or the vacant part due to shortening the data time slot and/or the uplink special time slot is formed into a symbol (for convenience of description, the symbol is referred to as the first a symbol), thereby increasing the symbol in the field, the S-SCH can be set in the first symbol, so that the S-SCH no longer occupies the symbol of the data frame slot, on the one hand, the resource utilization can be improved;
  • the DwPTS since the DwPTS includes two OFDM symbols for carrying the S-SCH and the P-SCH, the DwPTS time slot can be moved, for example, the DwPTS is placed at the forefront of the field, thereby effectively solving the power consumption.
  • FIG. 1 is a schematic structural diagram of a radio frame in the prior art
  • FIG. 2 is a schematic structural diagram of a radio frame according to Embodiment 1 of the present invention.
  • FIG. 3 is a schematic structural diagram of another radio frame according to Embodiment 1 of the present invention.
  • FIG. 4 is a schematic structural diagram of another radio frame according to Embodiment 1 of the present invention. detailed description
  • An embodiment of the present invention provides a communication method, where the method includes the following steps:
  • the first communication device sends a data frame to the second communication device.
  • the data frame includes a data slot, an uplink special slot, a downlink special slot, and a protection slot.
  • the data slot and the uplink special slot are shorter than the original slot, and the downlink special slot and/or protection time
  • the slot is longer than the original slot, and the total length of the data slot, the uplink special slot, the downlink special slot, and the protection slot can remain unchanged.
  • the data slot is used for transmitting uplink or downlink data;
  • the downlink special slot is used for carrying synchronization information to implement cell search and downlink synchronization;
  • the UpPTS is an uplink special time slot, which is placed after the GP.
  • TS1 Before TS1, it is used to implement uplink random access, etc.; GP is used to prevent interference between uplink and downlink, that is, interference of downlink special time slot to uplink time slot.
  • GP is used to prevent interference between uplink and downlink, that is, interference of downlink special time slot to uplink time slot.
  • An example of shortening the data slot and the uplink special slot is described below.
  • the data slot length and/or the UpPTS slot length are shortened, for example, the data slots #0 to #6 are shortened from 675us to 667us, and the UpPTS slot length is shortened from 141.28us to 116.67us, In this way, 80.61us can be added.
  • the shortened data slot length is referred to as the first slot
  • the shortened UpPTS slot length is referred to as the second slot.
  • the shortening method can reduce the length of the CP in the data slot and/or the length of the CP in the UpPTS slot, such as changing the length of the long CP from 544*TS to 512*TS, and changing the length of the short CP from 256*TS to 224*TS can also directly reduce OFDM symbols in a certain data slot, such as reducing OFDM symbols in #6.
  • the first time slot and/or the second time slot can be reasonably utilized to reduce the interference to the uplink time slot when the DwPTS is drifted, and improve the communication quality. Different technical solutions are described below depending on the location of the first time slot.
  • the first time slot and/or the second time slot constitute at least one OFDM symbol, such as the length of one OFDM symbol
  • the first time slot and/or The second time slot is set in front of the DwPTS, and the S-SCH in the original data slot #0 is set in the first time slot and/or the second time slot, so that the S-SCH is combined with the P-SCH in the DwPTS.
  • a new DwPTS time slot is formed, thus vacating a symbol for the #0 data slot to facilitate the transmission of other information, thereby improving resource utilization.
  • the DwPTS includes two OFDM symbols (S-SCH and P-SCH, respectively), the position of the DwPTS can be flexibly arranged.
  • the DwPTS can be set at the forefront of the data frame.
  • the DwPTS since the DwPTS is set at the forefront of the data frame, it is far from the UpPTS. Thereby, the interference to the uplink time slot when the DwPTS drifts or the power is increased is reduced, and the communication quality is improved.
  • the S-SCH since the S-SCH requires the P-SCH signal for channel estimation, the two are transmitted in adjacent symbols, and the channel estimation is accurate, which does not affect system performance.
  • some or all of the first time slot and/or the second time slot are set behind the DwPTS, so that the first time slot is added after the DwPTS, and the distance from the UpPTS is increased, thereby reducing the DwPTS. Interference with uplink time slots during drift or power boost improves communication quality.
  • the embodiment of the present invention discloses a communication device, including: a sending unit, configured to send a radio frame, where each field of the radio frame includes a data slot and a downlink special slot, where the data slot is used for data transmission.
  • the downlink special time slot is used to carry synchronization information; the data time slot is shorter than the original data time slot.
  • the data time slots #0 to #6 can be shortened from 675us to 667us, for convenience of description, the shortened data slot length is referred to as a first time slot, wherein at least part of the first time slot is located at a front end and/or a back end of the downlink special time slot.
  • the downlink special time slot is longer than the original time slot, when one OFDM symbol is long, the S-SCH can be set in the OFDM symbol, and at this time, a symbol can be saved for #0 to transmit other data, thereby improving communication.
  • the downlink special time slot can be moved as a complete time slot, such as moving to the front end of the field, so that the downlink special time slot is far away from the uplink time slot, thereby reducing the DwPTS drift or Interference to the upstream time slot when the power is boosted.
  • the embodiment further discloses another communication device, including: a sending unit, configured to send a radio frame, where each field of the radio frame includes a data slot, a downlink special slot, and a protection slot, where the data is The slot is used for data transmission; the downlink special time slot is used to carry synchronization information; the protection time slot is used to prevent interference between uplink and downlink; and the data time slot is shorter than the original data time slot by the first time slot. At least part of the first time slot is located in the protection time slot, and the protection time slot is longer than the original time slot, The total length of the data slot, the downlink special slot, and the guard slot are unchanged. Since the protection time slot is longer than the original time slot, the distance between the downlink special time slot and the uplink time slot is increased, thereby reducing interference to the uplink time slot when the DwPTS is drifted or when the power is boosted.
  • a sending unit configured to send a radio frame, where each field of the radio frame includes a data slot, a downlink special
  • the interval between the DwPTS and the UpPTS may be increased, thereby reducing the interference of the DwPTS on the uplink time slot; or the vacant part due to shortening the data time slot and/or the uplink special time slot is formed into a symbol (for convenience of description, The symbol is called the first symbol), thereby increasing the symbols in the field, so that the S-SCH no longer occupies the symbols of the data slot, on the one hand, the resource utilization can be improved; on the other hand, since the DwPTS contains two OFDM symbols For carrying the S-SCH and the P-SCH, so that the DwPTS time slot can be moved, for example, the DwPTS is placed at the forefront of the field, thereby more effectively solving the DwPTS caused by the power boost

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

Description

一种通信方法和装置 技术领域
本发明涉及一种通信技术, 尤其涉及一种通信方法和装置。 背景技术
如图 1所示, 在长期演进类型 2宽带时分双工 (LTE Type2 TDD )移动通 信系统中, 终端与基站之间传输的无线帧(radio frame )的长度为 10ms。 每个 无线帧又分为两个半帧(half-frame ) , 每个半帧包括 7个子帧(子帧也称数据 时隙 )和 3个特殊时隙。 以 20MHz带宽的 LTE系统为例 , 系统带宽为 20ΜΗζ , 子载波间隔 A = 15jKfe , FFT釆样点数为 NFFT=2048,
Figure imgf000003_0001
NFFT)=l/(15000*2048)=0.03255us„ 这时, 7个数据时隙用于上行或下行数据 的传输, 每个数据时隙由 CP (循环前缀) 和 OFDM ( Othogonal Frequency Division Multiplex, 正交频分复用)符号组成, OFDM符号长度为 2048 *Ts, 短 CP长度为 256*Ts , 长 CP为 544*Ts , 每个数据时隙的总长度为 675us ( 20736*Ts ) ; 所述数据时隙可分为上行时隙和下行时隙, 其中, 每个下行 时隙在短 CP下由 9个 OFDM符号组成, 长 CP下由 8个 OFDM符号组成; 每个上 行时隙在短 CP下由 9个长块组成, 长 CP下由 8个长块组成。 7个数据时隙可用 #0、 #1、 #2、 #3、 #4、 #5、 #6来标识, 或者用 TS0、 TS1、 TS2、 TS3、 TS4、 TS5、 TS6来标识, 其中, #0对应 TS0, ... , #6对应 TS6。 #0只能用于下行。 3 个特殊时隙包括 DwPTS (下行特殊时隙) 、 GP (保护时隙)和 UpPTS (上行 特殊时隙),其中, DwPTS为下行特殊时隙,其位于 TS0之后,长度为 2572*Ts, 包括一个 CP (长度为 524*Ts )和一个 OFDM符号(长度为 2048*Ts ) ,该 OFDM 符号用于承载主同步信道(P-SCH ) , 以实现小区搜索、 下行同步等操作, 而 辅同步信道( S-SCH )在数据时隙 #0的最后一个符号中传输; UpPTS为上行特 殊时隙, 放置于 GP之后, TS1之前, 长度为 4340*Ts, 以实现上行随机接入等; GP为保护时隙, 长度为 50us(1536*Ts), 无数据信号传送, 放置在上行特殊时 隙 UpPTS的前面, 以防止下行特殊时隙对上行特殊时隙的干扰。
在上述数据帧结构中, 当 S-SCH占据 #0的最后一个符号时, 限制了 #0中 BCH (广播信道)等信息的传输效率。 另一方面, 由于 DwPTS与下行时隙仅 相距 GP时隙,当 DwPTS漂移时或功率提升时,会导致 DwPTS对上行时隙干扰, 从而降低了通信质量。 发明内容
本发明的实施例提供了一种通信方法和装置, 可解决现有技术中限制 #0 中 BCH等信息的传输效率的问题, 及 DwPTS对上行时隙干扰的问题。
本发明的实施例提供了一种通信方法, 应用于长期演进类型 2宽带时分双 工移动通信系统中, 包括:
第一通信设备向第二通信设备发送无线帧, 所述无线帧的每个半帧包括 数据时隙和下行特殊时隙, 所述数据时隙用于数据的传输; 所述下行特殊时 隙用于承载同步信息; 所述数据时隙较原数据时隙要短第一时隙。
较佳地,至少部分所述第一时隙位于所述下行特殊时隙的前端和 /或后端。 本发明的实施例还提供了一种通信装置, 应用于长期演进类型 2宽带时分 双工移动通信系统中, 包括:
发送单元, 用于发送无线帧, 所述无线帧的每个半帧包括数据时隙和下 行特殊时隙, 所述数据时隙用于数据的传输; 所述下行特殊时隙用于承载同 步信息; 所述数据时隙较原数据时隙要短第一时隙。
较佳地,至少部分所述第一时隙位于所述下行特殊时隙的前端和 /或后端。 本发明的实施例还提供了一种通信方法, 应用于长期演进类型 2宽带时分 双工移动通信系统中, 包括:
第一通信设备向第二通信设备发送无线帧, 所述无线帧的每个半帧包括 数据时隙和下行特殊时隙, 所述数据时隙用于数据的传输; 所述下行特殊时 隙用于承载同步信息; 所述数据时隙不长于 667us。
较佳地, 所述无线帧的半帧中还包括上行特殊时隙, 所述上行特殊时隙 不长于 116.67us。
较佳地, 所述无线帧的半帧中还包括保护时隙, 所述保护时隙用于防止 上下行间的干扰; 以及所述保护时隙的长度大于 50us。
相应地, 本发明实施例还提供了一种通信装置, 应用于长期演进类型 2宽 带时分双工移动通信系统中, 包括发送单元, 用于发送无线帧, 所述无线帧 的每个半帧包括数据时隙和下行特殊时隙, 所述数据时隙用于数据的传输; 所述下行特殊时隙用于承载同步信息; 所述数据时隙不长于 667us。
根据本发明实施例, 通过缩短数据时隙和 /或上行特殊时隙, 通过合理利 用因缩短数据时隙和 /或上行特殊时隙而空余的部分, 如将该部分设置在 GP 中, 可增加 DwPTS与 UpPTS之间间隔,从而减少了 DwPTS对上行时隙的干扰; 或者将因缩短数据时隙和 /或上行特殊时隙而空余的部分组成一个符号 (为描 述方便, 将该符号称作第一符号) , 从而增加了半帧中的符号, 可将 S-SCH 设置在该第一符号中, 使得 S-SCH不再占用数据帧时隙的符号, 一方面, 可提 高资源利用率; 另一方面, 由于 DwPTS包含两个 OFDM符号, 用于承载 S-SCH 和 P-SCH, 这样, 可移动 DwPTS时隙, 如, 将 DwPTS放置在半帧的最前端, 从而更有效的解决了由于功率提升造成的 DwPTS对上行时隙造成的干扰问 题。 附图说明
图 1示出了现有技术中无线帧的结构示意图;
图 2示出了本发明实施例一的无线帧的结构示意图;
图 3示出了本发明实施例一的另一无线帧的结构示意图;
图 4示出了本发明实施例一的另一无线帧的结构示意图。 具体实施方式
为了便于本领域一般技术人员理解和实现本发明, 现结合附图描绘本发 明的实施例。 实施例一
本发明实施例提供了一种通信方法, 所述方法包括步骤: 第一通信设备 向第二通信设备发送数据帧。 该数据帧包括数据时隙、 上行特殊时隙、 下行 特殊时隙和保护时隙, 所述数据时隙和上行特殊时隙较原来时隙要短, 所述 下行特殊时隙和 /或保护时隙较原时隙要长, 所述数据时隙、 上行特殊时隙、 下行特殊时隙和保护时隙总长度可保持不变。 其中, 所述数据时隙用于上行 或下行数据的传输; 所述下行特殊时隙用于承载同步信息, 以实现小区搜索、 下行同步等操作; UpPTS为上行特殊时隙, 放置于 GP之后, TS1之前, 用于实 现上行随机接入等; GP用于防止上下行间的干扰, 即下行特殊时隙对上行时 隙的干扰。 下面描述了缩短数据时隙和上行特殊时隙的一个例子。
如图 2所示, 将数据时隙长度和 /或 UpPTS时隙长度缩短, 如, 将数据时隙 #0至 #6由 675us缩短到 667us, 将 UpPTS时隙长度由 141.28us缩短到 116.67us, 这样, 可多出 80.61us, 为方便描述, 将缩短的数据时隙长度称为第一时隙, 将缩短的 UpPTS时隙长度称为第二时隙。 缩短的方法可减少数据时隙中 CP的 长度和 /或 UpPTS时隙中 CP的长度, 如将长 CP的长度由 544*TS变为 512*TS , 将短 CP的长度由 256*TS变为 224*TS, 也可直接减少某个数据时隙中的 OFDM 符号, 如减少 #6中的 OFDM符号。 通过上面对数据帧调整之后, 合理利用该第 一时隙和 /或第二时隙, 可以减小 DwPTS漂移时对上行时隙时的干扰, 提高通 信质量。 下面根据该第一时隙的位置不同描述不同的技术方案。
方案一、如图 3所示, 当上述第一时隙和 /或第二时隙的长度组成至少一个 OFDM符号时, 如组成一个 OFDM符号的长度时, 可将上述第一时隙和 /或第 二时隙设置在 DwPTS的前面, 将原来数据时隙 #0中的 S-SCH设置在该第一时 隙和 /或第二时隙中, 使得 S-SCH与 DwPTS中的 P-SCH合在一起, 组成新的 DwPTS时隙, 这样, 为 #0数据时隙空出了一个符号, 以利于其它信息的传输, 从而提高了资源利用率。这时,由于 DwPTS包含两个 OFDM符号(分别为 S-SCH 和 P-SCH ) , 从而可灵活安排 DwPTS的位置。 如图 2所示, 可将 DwPTS设置在 数据帧的最前端, 这样, 由于 DwPTS设置在数据帧的最前端, 距 UpPTS较远, 从而减小了 DwPTS漂移时或功率提升时对上行时隙的干扰, 提高通信质量。 另外, 由于 S-SCH需要 P-SCH的信号做信道估计, 二者在相邻符号传输, 信道 估计较准确, 不会影响系统性能。
方案二、 将上述第一时隙和 /或第二时隙的部分或全部设置在 DwPTS的后 面, 这样, 由于 DwPTS后面增加了第一时隙, 增加了与 UpPTS的距离, 从而 减小了 DwPTS漂移时或功率提升时对上行时隙的干扰, 提高通信质量。
方案三、如图 4所示, 将上述第一时隙和 /或第二时隙的部分或全部设置在 GP中, 这样, 由于加大了 GP的长度, 即, 使 GP的长度大于 50us, 扩大了保护 时隙的时间, 从而增加了 DwPTS与 UpPTS之间的间隔, 可减小 DwPTS漂移时 或功率提升时对上行时隙的干扰, 提高通信质量。
实施例二
本实施例公开了一种通信装置, 包括: 发送单元, 用于发送无线帧, 所 述无线帧的每个半帧包括数据时隙和下行特殊时隙, 所述数据时隙用于数据 的传输; 所述下行特殊时隙用于承载同步信息; 所述数据时隙较原数据时隙 要短, 比如, 与上述的方法实施例类似, 可以将数据时隙 #0至 #6由 675us缩短 到 667us, 为方便描述, 将缩短的数据时隙长度称为第一时隙, 其中, 至少部 分所述第一时隙位于所述下行特殊时隙的前端和 /或后端。 由于下行特殊时隙 较原时隙要长, 当长一个 OFDM符号时, 可将 S-SCH设置在该 OFDM符号中, 这时, 可为 #0节省一符号, 以传输其它数据, 从而提高通信效率; 另一方面, 下行特殊时隙可作为一个完整的时隙进行移动, 如移动到半帧的最前端, 使 得下行特殊时隙与上行时隙距离较远, 从而减小了 DwPTS漂移时或功率提升 时对上行时隙的干扰。
本实施例还公开了另一种通信装置, 包括: 发送单元, 用于发送无线帧, 所述无线帧的每个半帧包括数据时隙、 下行特殊时隙和保护时隙, 所述数据 时隙用于数据的传输; 所述下行特殊时隙用于承载同步信息; 所述保护时隙 用于防止上下行间的干扰; 所述数据时隙较原数据时隙要短第一时隙, 至少 部分所述第一时隙位于所述保护时隙中, 所述保护时隙较原时隙要长, 所述 数据时隙、 下行特殊时隙和保护时隙总长度不变。 由于保护时隙较原时隙要 长, 增加了下行特殊时隙与上行时隙距离, 从而减小了 DwPTS漂移时或功率 提升时对上行时隙的干扰。
根据本发明实施例, 通过缩短数据时隙的长度和 /或上行特殊时隙的长度, 通过合理利用因缩短数据时隙和 /或上行特殊时隙而空余的部分, 如将该部分 设置在 GP中, 可增加 DwPTS与 UpPTS之间间隔, 从而减少了 DwPTS对上行时 隙的干扰; 或者将因缩短数据时隙和 /或上行特殊时隙而空余的部分组成一个 符号 (为描述方便, 将该符号称作第一符号) , 从而增加了半帧中的符号, 使得 S-SCH不再占用数据时隙的符号,一方面,可提高资源利用率;另一方面, 由于 DwPTS包含两个 OFDM符号, 用于承载 S-SCH和 P-SCH, 这样, 可移动 DwPTS时隙, 如, 将 DwPTS放置在半帧的最前端, 从而更有效地解决了由于 功率提升造成的 DwPTS对上行时隙造成的干扰问题。
虽然通过实施例描绘了本发明, 但本领域普通技术人员知道, 在不脱离 本发明的精神和实质的情况下, 就可使本发明有许多变形和变化, 本发明的 范围由所附的权利要求来限定。

Claims

权 利 要 求
1、 一种通信方法, 应用于长期演进类型 2宽带时分双工移动通信系统中, 包括:
第一通信设备向第二通信设备发送无线帧, 所述无线帧的每个半帧包括 数据时隙和下行特殊时隙, 所述数据时隙用于数据的传输; 所述下行特殊时 隙用于承载同步信息;
其特征在于, 所述数据时隙较原数据时隙要短第一时隙。
2、 根据权利要求 1所述的方法, 其特征在于, 至少部分所述第一时隙位 于所述下行特殊时隙的前端和 /或后端。
3、 根据权利要求 1所述的方法, 其特征在于, 通过缩短原数据时隙中的 循环前缀, 使得缩短循环前缀后的数据时隙较原数据时隙要短第一时隙。
4、 根据权利要求 1所述的方法, 其特征在于, 所述无线帧的半帧中还包 括上行特殊时隙, 所述上行特殊时隙较原上行特殊时隙要短第二时隙。
5、 根据权利要求 4所述的方法, 其特征在于, 至少部分所述第二时隙位 于所述下行特殊时隙的前端和 /或后端。
6、 根据权利要求 1所述的方法, 其特征在于, 所述无线帧的半帧中还包 括保护时隙, 所述保护时隙用于防止上下行间的干扰; 以及
至少部分所述第一时隙位于所述保护时隙中。
7、 根据权利要求 6所述的方法, 其特征在于, 所述无线帧的半帧中还包 括上行特殊时隙, 所述上行特殊时隙较原上行特殊时隙要短第二时隙。
8、 根据权利要求 7所述的方法, 其特征在于, 至少部分所述第二时隙位 于所述保护时隙中。
9、 根据权利要求 1所述的方法, 其特征在于, 至少部分第一时隙的长度 为至少一个正交频分复用符号。
10、 根据权利要求 4所述的方法, 其特征在于, 至少部分第一时隙的长度 与至少部分第二时隙的长度之和为至少一个正交频分复用符号。
11、 根据权利要求 1所述的方法, 其特征在于, 所述下行特殊时隙包括主 同步信道和辅同步信道, 其中, 所述辅同步信道承载在所述至少部分第一时 隙中。
12、 根据权利要求 4所述的方法, 其特征在于, 所述下行特殊时隙包括主 同步信道和辅同步信道, 其中, 所述辅同步信道承载在所述至少部分第一时 隙中和所述至少部分第二时隙中。
13、 根据权利要求 12所述的方法, 其特征在于, 所述下行特殊时隙设置 在所述半帧的最前端。
14、一种通信装置,应用于长期演进类型 2宽带时分双工移动通信系统中, 其特征在于, 包括:
发送单元, 用于发送无线帧, 所述无线帧的每个半帧包括数据时隙和下 行特殊时隙, 所述数据时隙用于数据的传输; 所述下行特殊时隙用于承载同 步信息; 所述数据时隙较原数据时隙要短第一时隙。
15、 根据权利要求 14所述的装置, 其特征在于, 至少部分所述第一时隙 位于所述下行特殊时隙的前端和 /或后端。
16、 根据权利要求 14所述的装置, 其特征在于, 所述发送单元发送的无 线帧中还包括保护时隙, 所述保护时隙用于防止上下行间的干扰; 以及
至少部分所述第一时隙位于所述保护时隙中。
17、一种通信方法,应用于长期演进类型 2宽带时分双工移动通信系统中, 其特征在于, 包括:
第一通信设备向第二通信设备发送无线帧, 所述无线帧的每个半帧包括 数据时隙和下行特殊时隙, 所述数据时隙用于数据的传输; 所述下行特殊时 隙用于承载同步信息; 所述数据时隙不长于 667us。
18、 根据权利要求 17所述的方法, 其特征在于, 所述无线帧的半帧中还 包括上行特殊时隙, 所述上行特殊时隙不长于 116.67us。
19、 根据权利要求 17所述的方法, 其特征在于, 所述无线帧的半帧中还 包括保护时隙, 所述保护时隙用于防止上下行间的干扰; 以及 所述保护时隙的长度大于 50us。
20、 一种通信装置,应用于长期演进类型 2宽带时分双工移动通信系统中, 其特征在于, 包括:
发送单元, 用于发送无线帧, 所述无线帧的每个半帧包括数据时隙和下 行特殊时隙, 所述数据时隙用于数据的传输; 所述下行特殊时隙用于承载同 步信息; 所述数据时隙不长于 667us。
21、 根据权利要求 20所述的装置, 其特征在于, 所述发送单元发送的无 线帧的半帧中还包括上行特殊时隙, 所述上行特殊时隙不长于 116.67us。
22、 根据权利要求 20所述的装置, 其特征在于, 所述发送单元发送的无 线帧的半帧中还包括保护时隙, 所述保护时隙用于防止上下行间的干扰; 以 及
所述保护时隙的长度大于 50us。
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