WO2009109079A1 - Multiplexing method of control channel in an ofdm system including relay station - Google Patents

Multiplexing method of control channel in an ofdm system including relay station Download PDF

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Publication number
WO2009109079A1
WO2009109079A1 PCT/CN2008/002133 CN2008002133W WO2009109079A1 WO 2009109079 A1 WO2009109079 A1 WO 2009109079A1 CN 2008002133 W CN2008002133 W CN 2008002133W WO 2009109079 A1 WO2009109079 A1 WO 2009109079A1
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mode
downlink control
transparent
tdm
control channel
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PCT/CN2008/002133
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French (fr)
Chinese (zh)
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毕峰
袁明
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中兴通讯股份有限公司
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Publication of WO2009109079A1 publication Critical patent/WO2009109079A1/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0001—Arrangements for dividing the transmission path
    • H04L5/0003—Two-dimensional division
    • H04L5/0005—Time-frequency
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0001—Arrangements for dividing the transmission path
    • H04L5/0003—Two-dimensional division
    • H04L5/0005—Time-frequency
    • H04L5/0007—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W84/00—Network topologies
    • H04W84/02—Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
    • H04W84/04—Large scale networks; Deep hierarchical networks
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/02—Terminal devices
    • H04W88/04—Terminal devices adapted for relaying to or from another terminal or user

Definitions

  • the present invention relates to the field of mobile communications, and in particular to a method for multiplexing a downlink control channel in a 3GPP Long Term Evolution (LTE) system.
  • LTE Long Term Evolution
  • the multiplexing form between the control channel and the traffic channel can be in the time direction and the frequency direction. That is, TDM (Time Division Multiplex) and FDM (Frequency Division Multiplex) are used.
  • the UT In the LTE system, considering the power saving problem of the UT (User Terminal), the UT needs to enter the micro sleep mode, and finally the control information sent by the BS (base station) is TDM. For example, in one subframe, 14 OFDM symbols are included, and if the control channel is in TDM mode, the first N OFDM symbols are occupied.
  • the UT listens to the control channel, and if it listens to its own ID (identity), it continues to receive the traffic channel and demodulates it; if it does not listen to its own ID, it enters the micro sleep mode.
  • the technical problem to be solved by the present invention is to provide a multiplexing method for a control channel when there is a relay station in an orthogonal frequency division multiplexing system, and to provide a multiplexing control mode for a downlink control channel for an OFDM system with a relay station.
  • the present invention provides a multiplexing method for a control channel when there is a relay station in an orthogonal frequency division multiplexing system, which is applicable to a 3GPP long term evolution system and a super 3G system.
  • IMT-Advanced including:
  • the relay station RS in the system is a non-transparent RS
  • the downlink control information between the base station BS, the non-transparent RS and the user terminal UT, and the data service use frequency division multiplexing mode FDM or time division multiplexing mode TDM or hybrid multiplexing
  • FDM frequency division multiplexing mode
  • TDM time division multiplexing mode
  • hybrid multiplexing The mode of the HDM is sent on the downlink control channel, where the HDM mode is a multiplexing mode in which TDM and FDM are combined;
  • downlink control information between the BS and the transparent RS, and downlink control information and data traffic between the BS and the UT are used in the FDM multiplexing mode or the TDM multiplexing mode or the HDM multiplexing mode. Transmitted on the downlink control channel.
  • the party transmitting the downlink control channel sends the downlink control information and/or the data service in the TDM multiplexing manner.
  • the RS is a non-transparent RS
  • the downlink control channel between the BS and the non-transparent RS is transmitted in an FDM manner or an HDM manner.
  • the RS is a non-transparent RS
  • the downlink control channel between the non-transparent RS and the UT is transmitted in a TDM manner.
  • the downlink control channel between the BS and the UT is transmitted in a TDM manner.
  • the RS is a transparent RS
  • the downlink control channel between the BS and the transparent RS is transmitted in a TDM manner.
  • the RS is a transparent RS
  • the downlink control channel between the BS and the UT is transmitted in a TDM manner.
  • the subcarrier frequency hopping mode is adopted, so that control channels of different cells occupy different subcarriers.
  • the HDM method of the invention not only ensures the coverage and frequency diversity gain of the non-transparent RS, but also facilitates the micro sleep of the transparent RS and the UT.
  • BRIEF abstract Figure 1 is a schematic diagram of the FDM mode.
  • Figure 2 is a schematic diagram of frequency hopping in FDM mode.
  • FIG. 3 is a schematic diagram of the TDM mode.
  • FIG. 4 is a schematic diagram of the TDM+FDM mode.
  • Figure 5 is a schematic diagram of frequency hopping in TDM+FDM mode.
  • the invention is particularly applicable to LTE (3GPP Long Term Evolution) and IMT-Advanced with RS
  • the transmission mode between the BS and the RS and between the RS and the UT needs to be reconsidered, mainly according to the requirements of the receiving end, such as the need for reliability or whether power saving needs to be considered.
  • the downlink control channel uses the FDM mode (as shown in FIG. 1 and FIG. 2) to obtain the frequency diversity gain, the control information can be allocated to different subcarriers of different symbols, thereby improving the reliability of the control channel;
  • Using the TDM method shown in Figure 3) will facilitate the micro sleep mode, that is, the receiving end can obtain better power saving effect.
  • the present invention also utilizes a new transmission mode (HDM (Hybrid Division Multiplex) mode (shown in Figures 4 and 5) based on the existing TDM and FDM modes, that is, TDM and FDM phases.
  • HDM Hybrid Division Multiplex
  • the combination of the so-called combination is the control channel multiplexing and the use of TDM and FDM two ways, HDM mode can obtain better frequency diversity gain than TDM mode.
  • ⁇ denotes a pilot (Pilot)
  • a country denotes control information (control)
  • ⁇ denotes a data service (data).
  • the multiplexing mode of the control channel is also different, mainly according to the requirements of the receiving end, as follows:
  • Non-transparent RS In the case of non-transparent RS, both downlink control information and data services must be transmitted to the UT through the RS.
  • Non-transparent RS generally does not enter micro sleep mode, and RS receives control information and service data.
  • the control information sent by the BS to the RS is in the form of FDM or TDM+FDM, and the BS uses the downlink RS time slot to deliver to the RS, RS.
  • the decoding process After receiving the complete time slot, the decoding process is performed, and then the control information is followed by TDM. The way is then sent to the UT.
  • the control information is directly sent to the UT in the manner of TDM.
  • the transmission of control information can use the following scheme:
  • BS-->RS downlink control channel transmission is preferably FDM or TDM+FDM, or TDM;
  • FDM Frequency Division Multiple Access
  • TDM+FDM the subcarrier mapping method shown in Figure 1
  • TDM+FDM the subcarrier mapping method shown in Figure 4
  • the figure shows the pilot (Pilot). Indicates control information (control) and ⁇ indicates data service (data).
  • the transmission of the RS ⁇ >UT downlink control channel is preferably TDM, or FDM or TDM+FDM;
  • the downlink control channel of the RS and the UT is preferably TDM.
  • BS ⁇ >UT downlink control information transmission is preferably TDM, or FDM or TDM+FDM;
  • the BS and UT downlink control channels preferably use TDM.
  • control channel directly communicating with the UT is preferably in the TDM mode.
  • transparent RS In transparent RS, only data traffic can be transmitted to the UT via RS. Therefore, transparent RS needs to fully consider the micro sleep mode, especially the mobile RS battery capacity is limited. That is to say, the micro slee mode of RS is only used for transparent RS, BS can activate RS to enter micro sleep, and RS micro slee mode is the same as UT.
  • the way in which the BS delivers the control information to the transparent RS and the UT is the same, that is, the BS directly sends the control information to the RS and the UT in the TDM manner.
  • the following scheme can be used to transmit downlink control information:
  • the transmission of the BS ⁇ >RS downlink control channel is preferably TDM, or FDM or TDM+FDM;
  • the downlink control channel of the BS and the RS is excellent.
  • the TDM method is used.
  • BS ⁇ >UT downlink control information transmission is preferably TDM, or FDM or TDM+FDM;
  • the downlink control channel of the BS and the UT is preferably TDM.
  • the subcarrier mapping for the FDM or TDM+FDM mode may be fixed, or may be a frequency hopping subcarrier mapping rule.
  • FIG. 2 and FIG. 5 are FDM mode and TDM+FDM mode after frequency hopping, and frequency hopping may be performed.
  • the control channels of different cells occupy different subcarriers, and the purpose is to randomize the interference between the cells, and the anti-interference ability after frequency hopping is stronger than the fixed frequency, and the frequency hopping technology can use the existing frequency hopping technology. Any of them.
  • the method of the present invention has simple control channel multiplexing, and can be applied to the problem that the TDM mode cannot be well applied when the RS exists.
  • the HDM mode of the present invention not only ensures the coverage and frequency diversity gain of the non-transparent RS, but also facilitates the micro sleep of the transparent RS and the UT.

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

Abstract

A multiplexing method of control channel in an OFDM system including a relay station (RS) is disclosed, which is suitable for 3GPP LTE system and B3G system IMT-Advanced. The method includes: when the RS in the system is a non-transparent RS, the downlink control information and data service among the BS, the non-transparent RS and the user terminal (UT) are transmitted in the downlink control channel by the mode of FDM or TDM or HDM, the HDM is a multiplexing mode which is a combination of TDM and FDM; when the RS in the system is a transparent RS, the downlink control information between the BS and the transparent RS and the downlink control information and data service between the BS and the UT are transmitted in the downlink control channel by the mode of FDM or TDM or HDM.

Description

在正交频分复用***中存在中继站时控制信道的复用方法  Method for multiplexing control channel when there is a relay station in orthogonal frequency division multiplexing system
技术领域 Technical field
本发明涉及移动通讯领域， 特别涉及 3GPP长期演进（ LTE )***中下行 控制信道的复用方法。  The present invention relates to the field of mobile communications, and in particular to a method for multiplexing a downlink control channel in a 3GPP Long Term Evolution (LTE) system.
背景技术 Background technique
在 OFDM ( Orthogonal Frequency Division Multiplexing, 正交频分复用 ) ***中， 由于是时频两维的数据形式， 所以控制信道与业务信道之间的复用 形式可以是时间方向上和频率方向上，即釆用 TDM ( Time Division Multiplex, 时分复用）方式和 FDM ( Frequency Division Multiplex, 频分复用）方式。  In an OFDM (Orthogonal Frequency Division Multiplexing) system, since it is a time-frequency two-dimensional data format, the multiplexing form between the control channel and the traffic channel can be in the time direction and the frequency direction. That is, TDM (Time Division Multiplex) and FDM (Frequency Division Multiplex) are used.
在 LTE***中， 充分考虑 UT ( User Terminal , 用户终端 ) 的省电问题， 需要 UT进入 micro sleep (微睡眠）模式， 则最终 BS (基站） 下发的控制信 息釆用 TDM方式。 例如在一个子帧中， 包括 14个 OFDM符号， 如果此时控 制信道釆用 TDM方式， 即占用前 N个 OFDM符号。 UT监听控制信道， 如 果监听到自己的 ID ( Identity, 标识） ， 则继续接收业务信道并进行解调； 如 果没有监听到自己的 ID , 则进入 micro sleep模式。  In the LTE system, considering the power saving problem of the UT (User Terminal), the UT needs to enter the micro sleep mode, and finally the control information sent by the BS (base station) is TDM. For example, in one subframe, 14 OFDM symbols are included, and if the control channel is in TDM mode, the first N OFDM symbols are occupied. The UT listens to the control channel, and if it listens to its own ID (identity), it continues to receive the traffic channel and demodulates it; if it does not listen to its own ID, it enters the micro sleep mode.
目前， 对于控制信道复用的研究是一个热点， 但是， 当 OFDM***中存 在 RS ( Relay Station, 中继站） 时， 下行控制信道复用方式的研究较少， 目 前的***都是釆用 TDM方式， 但 TDM方式不能很好的适合有 RS (包括透 明 RS和非透明 RS ) 的***。  At present, research on control channel multiplexing is a hot topic. However, when RS (Relay Station) exists in OFDM systems, there are few studies on downlink control channel multiplexing. The current systems use TDM. However, the TDM method is not well suited for systems with RS (including transparent RS and non-transparent RS).
发明内容 Summary of the invention
本发明所要解决的技术问题在于提供一种在正交频分复用***中存在中 继站时控制信道的复用方法， 为带有中继站的 OFDM***提供下行控制信道 的复用方式。  The technical problem to be solved by the present invention is to provide a multiplexing method for a control channel when there is a relay station in an orthogonal frequency division multiplexing system, and to provide a multiplexing control mode for a downlink control channel for an OFDM system with a relay station.
为了解决上述技术问题， 本发明提供了一种在正交频分复用***中存在 中继站时控制信道的复用方法， 适用于 3GPP 长期演进***和超 3G *** IMT-Advanced, 包括： In order to solve the above technical problem, the present invention provides a multiplexing method for a control channel when there is a relay station in an orthogonal frequency division multiplexing system, which is applicable to a 3GPP long term evolution system and a super 3G system. IMT-Advanced, including:
当***中的中继站 RS为非透明 RS时，基站 BS、非透明 RS与用户终端 UT之间的下行控制信息及数据业务釆用频分复用方式 FDM或时分复用方式 TDM或混分复用方式 HDM在下行控制信道上发送，所述 HDM方式为 TDM 与 FDM相结合的复用方式；  When the relay station RS in the system is a non-transparent RS, the downlink control information between the base station BS, the non-transparent RS and the user terminal UT, and the data service use frequency division multiplexing mode FDM or time division multiplexing mode TDM or hybrid multiplexing The mode of the HDM is sent on the downlink control channel, where the HDM mode is a multiplexing mode in which TDM and FDM are combined;
当***中的 RS为透明 RS时， BS与透明 RS之间的下行控制信息以及 BS与 UT之间的下行控制信息和数据业务釆用 FDM复用方式或 TDM复用方 式或 HDM复用方式在下行控制信道上发送。  When the RS in the system is a transparent RS, downlink control information between the BS and the transparent RS, and downlink control information and data traffic between the BS and the UT are used in the FDM multiplexing mode or the TDM multiplexing mode or the HDM multiplexing mode. Transmitted on the downlink control channel.
进一步地， 当接收方有微睡眠模式时， 发送下行控制信道的一方釆用 TDM复用方式发送下行控制信息和 /或数据业务。  Further, when the receiver has the micro sleep mode, the party transmitting the downlink control channel sends the downlink control information and/or the data service in the TDM multiplexing manner.
进一步地， 当所述 RS为非透明 RS时， BS与非透明 RS之间的下行控制 信道釆用 FDM方式或 HDM方式传输。  Further, when the RS is a non-transparent RS, the downlink control channel between the BS and the non-transparent RS is transmitted in an FDM manner or an HDM manner.
进一步地， 当所述 RS为非透明 RS时， 非透明 RS与 UT之间的下行控 制信道釆用 TDM方式传输。  Further, when the RS is a non-transparent RS, the downlink control channel between the non-transparent RS and the UT is transmitted in a TDM manner.
进一步地， 所述 BS与 UT之间的下行控制信道釆用 TDM方式传输。 进一步地， 当所述 RS为透明 RS时， BS与透明 RS之间的下行控制信道 釆用 TDM方式传输。  Further, the downlink control channel between the BS and the UT is transmitted in a TDM manner. Further, when the RS is a transparent RS, the downlink control channel between the BS and the transparent RS is transmitted in a TDM manner.
进一步地， 当所述 RS为透明 RS时， BS与 UT之间的下行控制信道釆用 TDM方式传输。  Further, when the RS is a transparent RS, the downlink control channel between the BS and the UT is transmitted in a TDM manner.
进一步地， 所述 FDM方式或 HDM方式传输时釆用子载波跳频方式， 使 不同小区的控制信道占用不同的子载波。  Further, when the FDM mode or the HDM mode is transmitted, the subcarrier frequency hopping mode is adopted, so that control channels of different cells occupy different subcarriers.
釆用本发明所述方法， 与现有技术相比， 控制信道复用简单， 可以针对 RS存在时 TDM方式不能很好适用的问题。 本发明所述 HDM方式既保证了 非透明 RS 的覆盖范围及频率分集增益， 也有利于透明 RS和 UT 的 micro sleep。 附图概述 图 1 是 FDM方式示意图。 Compared with the prior art, the control channel multiplexing is simple, and the TDM method cannot be well applied for the existence of the RS. The HDM method of the invention not only ensures the coverage and frequency diversity gain of the non-transparent RS, but also facilitates the micro sleep of the transparent RS and the UT. BRIEF abstract Figure 1 is a schematic diagram of the FDM mode.
图 2 是 FDM方式跳频示意图。  Figure 2 is a schematic diagram of frequency hopping in FDM mode.
图 3 是 TDM方式示意图。  Figure 3 is a schematic diagram of the TDM mode.
图 4 是 TDM+FDM方式示意图。  Figure 4 is a schematic diagram of the TDM+FDM mode.
图 5 是 TDM+FDM方式跳频示意图。  Figure 5 is a schematic diagram of frequency hopping in TDM+FDM mode.
本发明的较佳实施方式 Preferred embodiment of the invention
本发明特别适用于带有 RS的 LTE( 3 GPP长期演进***）和 IMT-Advanced The invention is particularly applicable to LTE (3GPP Long Term Evolution) and IMT-Advanced with RS
(超 3G***） 。 (Super 3G system).
在引入 RS之后， BS与 RS之间以及 RS与 UT之间的传输方式需要重新 考虑， 主要是根据接收端的需求， 例如对于可靠性的需求或者是否需要考虑 省电等。 如果下行控制信道釆用 FDM方式（如图 1、 2所示）可以获得频率 分集增益， 即可以把控制信息分配到不同符号的不同的子载波上， 从而可以 提高控制信道的可靠性；如果釆用 TDM方式（如图 3所示）则会有利于 micro sleep模式， 即接收端可以获得较好的省电效果。 另外， 本发明在现有 TDM 和 FDM 方式的基础上还利用了一种新的传输方式 HDM ( Hybrid Division Multiplex, 混分复用）方式（如图 4、 5所示 ) , 即 TDM和 FDM相结合的方 式，所谓相结合就是控制信道复用同时使用 了 TDM和 FDM两种方式， HDM 方式较 TDM方式也能获得更好的频率分集增益。 图 1至图 5中， ^表示导 频（Pilot ) , 國表示控制信息 （control ) , □表示数据业务（data ) 。  After the introduction of the RS, the transmission mode between the BS and the RS and between the RS and the UT needs to be reconsidered, mainly according to the requirements of the receiving end, such as the need for reliability or whether power saving needs to be considered. If the downlink control channel uses the FDM mode (as shown in FIG. 1 and FIG. 2) to obtain the frequency diversity gain, the control information can be allocated to different subcarriers of different symbols, thereby improving the reliability of the control channel; Using the TDM method (shown in Figure 3) will facilitate the micro sleep mode, that is, the receiving end can obtain better power saving effect. In addition, the present invention also utilizes a new transmission mode (HDM (Hybrid Division Multiplex) mode (shown in Figures 4 and 5) based on the existing TDM and FDM modes, that is, TDM and FDM phases. The combination of the so-called combination is the control channel multiplexing and the use of TDM and FDM two ways, HDM mode can obtain better frequency diversity gain than TDM mode. In Fig. 1 to Fig. 5, ^ denotes a pilot (Pilot), a country denotes control information (control), and □ denotes a data service (data).
在引入 RS后， 根据 RS的类型不同， 考虑到 RS的帧结构以及不同 RS 的特性， 控制信道的复用方式也是不同的， 主要是根据接收端的需求而定， 具体说明如下：  After the RS is introduced, depending on the type of RS, considering the frame structure of the RS and the characteristics of different RSs, the multiplexing mode of the control channel is also different, mainly according to the requirements of the receiving end, as follows:
在非透明 RS时， 下行控制信息与数据业务都须通过 RS传输到 UT。 非 透明 RS—般不会进入 micro sleep模式， RS时刻接收控制信息和业务数据。 为了更好的调整控制信息的覆盖能力及频率分集增益， 在下行 RS时隙， BS 下发给 RS的控制信息釆用 FDM或 TDM+FDM形式， BS利用下行 RS时隙 下发到 RS, RS接收到完整的时隙后进行解码处理，之后把控制信息按照 TDM 的方式再下发到 UT。 而对于 BS能覆盖到的 UT, 直接把控制信息按照 TDM 的方式下发到 UT。 具体地： 控制信息的传输可以釆用如下方案： In the case of non-transparent RS, both downlink control information and data services must be transmitted to the UT through the RS. Non-transparent RS generally does not enter micro sleep mode, and RS receives control information and service data. In order to better adjust the coverage of the control information and the frequency diversity gain, in the downlink RS time slot, the control information sent by the BS to the RS is in the form of FDM or TDM+FDM, and the BS uses the downlink RS time slot to deliver to the RS, RS. After receiving the complete time slot, the decoding process is performed, and then the control information is followed by TDM. The way is then sent to the UT. For the UT that the BS can cover, the control information is directly sent to the UT in the manner of TDM. Specifically: The transmission of control information can use the following scheme:
• BS-->RS下行控制信道的传输优选釆用 FDM或 TDM+FDM, 也可是 TDM;  • BS-->RS downlink control channel transmission is preferably FDM or TDM+FDM, or TDM;
由于无需考虑 RS的省电问题， 优选釆用 FDM或 TDM+FDM进行传输。 釆用 FDM方式时可以釆用如图 1所示的子载波映射方式， 釆用 TDM+FDM 方式时可以釆用如图 4所示的子载波映射方式， 图中 表示导频（Pilot ) ,匪 表示控制信息 （control ) , □表示数据业务（data ) 。  Since it is not necessary to consider the power saving problem of the RS, it is preferable to use FDM or TDM+FDM for transmission. When using the FDM method, the subcarrier mapping method shown in Figure 1 can be used. When the TDM+FDM method is used, the subcarrier mapping method shown in Figure 4 can be used. The figure shows the pilot (Pilot). Indicates control information (control) and □ indicates data service (data).
• RS~>UT 下行控制信道的传输优选釆用 TDM, 也可是 FDM 或 TDM+FDM;  • The transmission of the RS~>UT downlink control channel is preferably TDM, or FDM or TDM+FDM;
考虑到 UT的省电问题， 因此 RS与 UT的下行控制信道优选釆用 TDM 方式。  Considering the power saving problem of the UT, the downlink control channel of the RS and the UT is preferably TDM.
• BS~>UT 下行控制信息的传输优选釆用 TDM, 也可是 FDM 或 TDM+FDM;  • BS~>UT downlink control information transmission is preferably TDM, or FDM or TDM+FDM;
同样， 考虑到接收方 UT的省电问题， BS与 UT下行控制信道优选釆用 TDM的方式。  Similarly, considering the power saving problem of the receiving UT, the BS and UT downlink control channels preferably use TDM.
可见，当 UT作为接收端时，与 UT直接通信的控制信道都优选釆用 TDM 方式。  It can be seen that when the UT is used as the receiving end, the control channel directly communicating with the UT is preferably in the TDM mode.
在透明 RS时， 只有数据业务可以通过 RS传输到 UT。 所以透明 RS需 要充分考虑 micro sleep模式， 尤其是移动 RS电池能力有限。 也就是说 RS的 micro slee 模式仅仅用于透明 RS, BS可以激活 RS进入 micro sleep, RS micro slee 模式和 UT相同。 BS下发控制信息到透明 RS和 UT釆用的方式是相同 的， 即 BS直接把控制信息按照 TDM的方式下发到 RS和 UT。下行控制信息 的传输可以釆用如下方案： In transparent RS, only data traffic can be transmitted to the UT via RS. Therefore, transparent RS needs to fully consider the micro sleep mode, especially the mobile RS battery capacity is limited. That is to say, the micro slee mode of RS is only used for transparent RS, BS can activate RS to enter micro sleep, and RS micro slee mode is the same as UT. The way in which the BS delivers the control information to the transparent RS and the UT is the same, that is, the BS directly sends the control information to the RS and the UT in the TDM manner. The following scheme can be used to transmit downlink control information:
• BS~>RS 下行控制信道的传输优选釆用 TDM , 也可是 FDM 或 TDM+FDM;  • The transmission of the BS~>RS downlink control channel is preferably TDM, or FDM or TDM+FDM;
为了便于 RS进入到 micro sleep模式， 因此 BS与 RS的下行控制信道优 选釆用 TDM方式。 In order to facilitate the RS to enter the micro sleep mode, the downlink control channel of the BS and the RS is excellent. The TDM method is used.
• BS~>UT 下行控制信息的传输优选釆用 TDM, 也可是 FDM 或 TDM+FDM;  • BS~>UT downlink control information transmission is preferably TDM, or FDM or TDM+FDM;
同样， 考虑到 UT的省电问题， BS与 UT的下行控制信道优选釆用 TDM 方式。  Similarly, considering the power saving problem of the UT, the downlink control channel of the BS and the UT is preferably TDM.
对于 FDM或 TDM+FDM方式的子载波映射可以是固定的， 也可以是跳 频产生子载波映射规则， 例如图 2 和图 5 是经过跳频后的 FDM 方式和 TDM+FDM方式， 跳频可使不同小区的控制信道占用不同的子载波， 目的就 是使小区之间的干扰随机化， 相对于定频而言， 跳频后抗干扰能力更强， 跳 频技术可以釆用现有跳频技术中的任何一种。 The subcarrier mapping for the FDM or TDM+FDM mode may be fixed, or may be a frequency hopping subcarrier mapping rule. For example, FIG. 2 and FIG. 5 are FDM mode and TDM+FDM mode after frequency hopping, and frequency hopping may be performed. The control channels of different cells occupy different subcarriers, and the purpose is to randomize the interference between the cells, and the anti-interference ability after frequency hopping is stronger than the fixed frequency, and the frequency hopping technology can use the existing frequency hopping technology. Any of them.
当然， 本发明还可有其他多种实施例， 在不背离本发明精神及其实质的 但这些相应的改变和变形都应属于本发明所附的权利要求的保护范围。 工业实用性 It is a matter of course that the invention may be embodied in various other forms and modifications without departing from the spirit and scope of the invention. Industrial applicability
与现有技术相比， 本发明方法控制信道复用简单， 可以针对 RS存在时 TDM方式不能很好适用的问题。 本发明所述 HDM方式既保证了非透明 RS 的覆盖范围及频率分集增益， 也有利于透明 RS和 UT的 micro sleep。  Compared with the prior art, the method of the present invention has simple control channel multiplexing, and can be applied to the problem that the TDM mode cannot be well applied when the RS exists. The HDM mode of the present invention not only ensures the coverage and frequency diversity gain of the non-transparent RS, but also facilitates the micro sleep of the transparent RS and the UT.

Claims

权 利 要 求 书 Claim
1、 在正交频分复用***中存在中继站时控制信道的复用方法， 适用于 3GPP长期演进***和超 3G*** IMT-Advanced, 其特征在于， 1. A method for multiplexing a control channel when there is a relay station in an orthogonal frequency division multiplexing system, which is applicable to a 3GPP long-term evolution system and a super 3G system IMT-Advanced, wherein
当***中的中继站 RS为非透明 RS时，基站 BS、非透明 RS与用户终端 UT之间的下行控制信息及数据业务釆用频分复用方式 FDM或时分复用方式 TDM或混分复用方式 HDM在下行控制信道上发送，所述 HDM方式为 TDM 与 FDM相结合的复用方式；  When the relay station RS in the system is a non-transparent RS, the downlink control information between the base station BS, the non-transparent RS and the user terminal UT, and the data service use frequency division multiplexing mode FDM or time division multiplexing mode TDM or hybrid multiplexing The mode of the HDM is sent on the downlink control channel, where the HDM mode is a multiplexing mode in which TDM and FDM are combined;
当***中的 RS为透明 RS时， BS与透明 RS之间的下行控制信息以及 BS与 UT之间的下行控制信息和数据业务釆用 FDM复用方式或 TDM复用方 式或 HDM复用方式在下行控制信道上发送。  When the RS in the system is a transparent RS, downlink control information between the BS and the transparent RS, and downlink control information and data traffic between the BS and the UT are used in the FDM multiplexing mode or the TDM multiplexing mode or the HDM multiplexing mode. Transmitted on the downlink control channel.
2、 如权利要求 1所述的方法， 其特征在于， 2. The method of claim 1 wherein:
当接收方有微睡眠模式时， 发送下行控制信道的一方釆用 TDM复用方 式发送下行控制信息和 /或数据业务。  When the receiver has a micro-sleep mode, the party transmitting the downlink control channel transmits downlink control information and/or data traffic in TDM multiplexing mode.
3、 如权利要求 1所述的方法， 其特征在于， 3. The method of claim 1 wherein:
当所述 RS为非透明 RS时， BS与非透明 RS之间的下行控制信道釆用 FDM方式或 HDM方式传输。  When the RS is a non-transparent RS, the downlink control channel between the BS and the non-transparent RS is transmitted in the FDM mode or the HDM mode.
4、 如权利要求 1或 2或 3所述的方法， 其特征在于， 4. The method of claim 1 or 2 or 3, wherein
当所述 RS为非透明 RS时， 非透明 RS与 UT之间的下行控制信道釆用 TDM方式传输。  When the RS is a non-transparent RS, the downlink control channel between the non-transparent RS and the UT is transmitted in TDM mode.
5、 如权利要求 4所述的方法， 其特征在于， 5. The method of claim 4, wherein
所述 BS与 UT之间的下行控制信道釆用 TDM方式传输。  The downlink control channel between the BS and the UT is transmitted in TDM mode.
6、 如权利要求 1或 2所述的方法， 其特征在于， 6. The method of claim 1 or 2, wherein
当所述 RS为透明 RS时， BS与透明 RS之间的下行控制信道釆用 TDM 方式传输。  When the RS is a transparent RS, the downlink control channel between the BS and the transparent RS is transmitted in TDM mode.
7、 如权利要求 6所述的方法， 其特征在于, 当所述 RS为透明 RS时， BS与 UT之间的下行控制信道釆用 TDM方式 传输。 7. The method of claim 6 wherein: When the RS is a transparent RS, the downlink control channel between the BS and the UT is transmitted in a TDM manner.
8、 如权利要求 1或 3所述的方法， 其特征在于， 8. The method of claim 1 or 3, wherein
所述 FDM方式或 HDM方式传输时釆用子载波跳频方式，使不同小区的 控制信道占用不同的子载波。  When the FDM mode or the HDM mode is transmitted, the subcarrier frequency hopping mode is adopted, so that the control channels of different cells occupy different subcarriers.
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