WO2011038687A1 - 中继系统控制信道发送方法、检测方法及设备 - Google Patents

中继系统控制信道发送方法、检测方法及设备 Download PDF

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Publication number
WO2011038687A1
WO2011038687A1 PCT/CN2010/077490 CN2010077490W WO2011038687A1 WO 2011038687 A1 WO2011038687 A1 WO 2011038687A1 CN 2010077490 W CN2010077490 W CN 2010077490W WO 2011038687 A1 WO2011038687 A1 WO 2011038687A1
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WO
WIPO (PCT)
Prior art keywords
pdcch
time
pdsch
frequency
control information
Prior art date
Application number
PCT/CN2010/077490
Other languages
English (en)
French (fr)
Inventor
沈祖康
潘学明
肖国军
王立波
张文健
Original Assignee
大唐移动通信设备有限公司
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 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 EP10819916.7A priority Critical patent/EP2485410B1/en
Priority to KR1020117030050A priority patent/KR101464286B1/ko
Priority to US13/498,316 priority patent/US9912398B2/en
Publication of WO2011038687A1 publication Critical patent/WO2011038687A1/zh

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Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B7/00Radio transmission systems, i.e. using radiation field
    • H04B7/14Relay systems
    • H04B7/15Active relay systems
    • H04B7/155Ground-based stations
    • H04B7/15528Control of operation parameters of a relay station to exploit the physical medium
    • H04B7/15542Selecting at relay station its transmit and receive resources
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B7/00Radio transmission systems, i.e. using radiation field
    • H04B7/14Relay systems
    • H04B7/15Active relay systems
    • H04B7/155Ground-based stations
    • 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), 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
    • H04L5/0053Allocation of signaling, i.e. of overhead other than pilot 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
    • H04W72/0446Resources in time domain, e.g. slots or frames
    • 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
    • H04W72/0453Resources in frequency domain, e.g. a carrier in FDMA
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W72/00Local resource management
    • H04W72/12Wireless traffic scheduling
    • H04W72/1263Mapping of traffic onto schedule, e.g. scheduled allocation or multiplexing of flows
    • H04W72/1273Mapping of traffic onto schedule, e.g. scheduled allocation or multiplexing of flows of downlink data flows
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W72/00Local resource management
    • H04W72/20Control channels or signalling for resource management
    • H04W72/23Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal

Definitions

  • the present invention relates to the field of communications, and in particular, to a method, a method, and a device for transmitting a control channel of a relay system. Background technique
  • RN Relay Node
  • eNB evolved Node B
  • macro UE macro User Equipment
  • the three links need to use orthogonal radio resources.
  • the relay node In the same frequency band, in order to avoid self-interference, the relay node cannot send and receive data at the same time.
  • LTE-A Long Term Evolution-Advanced
  • the relay node can interact with its donor eNB (source base station) through the MFSB (Multicast Broadcast Single Frequency Network) subframe.
  • MFSB Multicast Broadcast Single Frequency Network
  • the relay node is in one MBSFN subframe, and the user terminal (R-UE) serving to it is in one or two OFDM (Orthogonal Frequency Division Multiplexing).
  • a PDCCH physical downlink control channel
  • the relay node may receive control information (R-PDCCH) and data information (R-PDSCH (Physical Downlink Shared Channel)) from the donor eNB.
  • R-PDCCH control information
  • R-PDSCH Physical Downlink Shared Channel
  • the R-PDCCH may be transmitted on some preset resource block sets, and different relay nodes may share the R-PDCCH resource blocks, and
  • the downlink scheduling information (DL grant) and the uplink scheduling information (UL grant) are obtained by blind detection on the resource block.
  • RN1 and RN2 in FIG. 2 may share the R-PDCCH resource block.
  • the relay node obtains the resource allocation indication of the R-PDSCH according to the downlink scheduling information obtained by the blind detection on the R-PDCCH resource block.
  • the base station can simultaneously schedule the macro UE (macro-UE) and the relay node in one subframe as long as their resource allocation is orthogonal.
  • the downlink data of the Macro-UE is called PDSCH, as shown in FIG. 2.
  • the R-PDCCH shown in FIG. 2 is shared by multiple relay nodes, and the R-PDCCH may also be dedicated by one relay node (RN specific ), as shown in FIG. 3: where the R-PDCCH resource block of RN1 is dedicated by RN1. That is, each resource block for transmitting the R-PDCCH of RN1 includes only the R-PDCCH of RN1.
  • the control signaling about RN1 is transmitted on the R-PDCCH of RN1, including DL grant, UL grant, and the like.
  • the remaining R-PDCCH resources may also exist and may be shared by several relay nodes, such as by RN2 and RN3.
  • the embodiment of the invention provides a method, a detection method and a device for transmitting a control channel of a relay system, so as to implement a dedicated R-PDCCH for designing a relay node.
  • An embodiment of the present invention provides a method for transmitting a control channel of a relay system, including: a base station transmitting a control channel R-PDCCH to a relay device RN served by the base station, where
  • the R-PDCCH includes control information DCI format of the RN, where the R-PDCCH is
  • the R-PDCCH is transmitted on the time-frequency resource, and the R-PDCCH of the other RN is not transmitted on the time-frequency resource for transmitting the R-PDCCH of the RN.
  • An embodiment of the present invention provides a method for detecting a control channel of a relay system, including: a relay device RN receiving a control channel R-PDCCH transmitted by a base station, and including control information of the RN in the R-PDCCH, the R- The PDCCH is sent on the R-PDCCH time-frequency resource.
  • the R-PDCCH of the other RN is not transmitted on the time-frequency resource for transmitting the R-PDCCH of the RN.
  • An embodiment of the present invention provides a base station device, including:
  • a channel sending unit configured to send a control channel R-PDCCH to a relay device RN served by the base station device, including control information DCI format of the RN in the R-PDCCH, where the R-PDCCH is in an R-PDCCH
  • the time-frequency resource is transmitted, and the R-PDCCH of the other RN is not transmitted on the time-frequency resource for transmitting the R-PDCCH of the RN.
  • An embodiment of the present invention provides a relay device, including:
  • a receiving unit configured to receive a control channel R-PDCCH sent by the base station, where the R-PDCCH is received on the R-PDCCH time-frequency resource, and not sent on the time-frequency resource of the R-PDCCH that receives the relay device RN.
  • R-PDCCH of the RN R-PDCCH of the RN;
  • an acquiring unit configured to acquire control information of the RN in the R-PDCCH.
  • the relay system dedicated control channel is configured according to the number of OFDM symbols occupied by the R-PDCCH and the mapping of the R-PDCCH/R-PDSCH to the RE, so that the R-PDCCH is required by one relay device.
  • FIG. 1 is a schematic diagram of a backhaul data that a relay node can interact with its donor eNB in a manner of a MFSBN subframe in the prior art
  • FIG. 2 is a schematic diagram of a PDCCH transmitted by a relay node to a user terminal served by a relay node in an MBSFN subframe in the prior art
  • FIG. 3 is a schematic diagram of a PDCCH dedicated to a relay node in an R-PDCCH in the prior art
  • 4a is a schematic flowchart of a method for configuring a dedicated control channel of a relay system according to an embodiment of the present invention
  • 4b is a schematic flow chart of a method for detecting a control channel of a relay system according to an embodiment of the present invention
  • FIG. 5 is a schematic diagram of a frequency domain resource in which a base station pre-configures an R-PDCCH according to an embodiment of the present invention
  • FIG. 6 is a schematic diagram of an R-PDCCH indicating, by the base station, the number of OFDM symbols occupied by the R-PDCCH in the time domain by transmitting the R-PCFICH on the R-PDCCH in the embodiment of the present invention
  • FIG. 7 is a schematic diagram of an R-PDCCH including a DCI format in an embodiment of the present invention
  • FIG. 8 is another schematic diagram of an R-PDCCH including a DCI format in an embodiment of the present invention
  • FIG. 9 is another embodiment of an R-PDCCH in an embodiment of the present invention.
  • FIG. 10 is a schematic diagram of an R-PDCCH when DRS is demodulated in an embodiment of the present invention
  • FIG. 11 is another schematic diagram of an R-PDCCH when DRS is demodulated in an embodiment of the present invention
  • FIG. 12 is a blind check according to an embodiment of the present invention. Schematic diagram of the R-PDCCH;
  • FIG. 13 is a schematic structural diagram of an apparatus for configuring a dedicated control channel of a relay system according to an embodiment of the present invention
  • FIG. 14 is a schematic structural diagram of a relay according to an embodiment of the present invention.
  • FIG. 15 is a schematic structural diagram of a base station according to an embodiment of the present invention.
  • FIG. 16 is a schematic structural diagram of a relay according to an embodiment of the present invention. detailed description
  • the core idea of the embodiment of the present invention is to: configure a relay system dedicated control channel according to the number of OFDM symbols occupied by the R-PDCCH and the mapping of the R-PDCCH/R-PDSCH to the RE.
  • An embodiment of the present invention provides a method for configuring a control channel of a relay system, as shown in FIG. 4a, including the following steps:
  • Step 401 The network side configures an OFDM symbol number of the orthogonal frequency division multiplexing technology occupied by the R-PDCCH, and configures a mapping of the R-PDCCH to a resource element RE.
  • Step 402 The network side sends a control channel R-PDCCH to its serving relay device, and includes control information of the relay device in the R-PDCCH, where the R-PDCCH is a dedicated R- of the relay device. PDCCH.
  • the number of OFDM symbols occupied by the R-PDCCH in the network side includes: the network side pre-configures the number of OFDM symbols occupied by the R-PDCCH; or the network side is the same as the R-PDCCH
  • the R-PCFICH Physical Control Format Indicator Channel
  • the R-PCFICH and the R-PDCCH occupy different resource elements RE
  • the number of OFDM symbols occupied by the R-PDCCH is indicated by the R-PCFICH .
  • mapping of the R-PDCCH to the resource element RE is specifically:
  • the network side maps the R-PDCCH to a resource element in a frequency domain preferential manner
  • the mapping of the R-PDCCH to the resource element RE includes:
  • the R-PDCCH of the network side includes a resource element corresponding to the R-PCFICH and a DCI format (Downlink Control Information Format) corresponding to the DL grant. a downlink control information format), a DCI format corresponding to the UL grant, and a resource element of the vacant R-PDCCH;
  • the network side configures the R-PDCCH to include a DCI format corresponding to the DL grant, a DCI format corresponding to the UL grant, and a vacant R-PDCCH.
  • An embodiment of the present invention provides a method for detecting a control channel of a relay system. As shown in FIG. 4b, the method includes the following steps:
  • Step 403 The relay device detects a control channel R-PDCCH of the backhaul backhaul link, where the R-PDCCH includes related control information of the relay device, and the R-PDCCH is a dedicated R- of the relay device. PDCCH.
  • Step 404 The relay device acquires control information carried in the R-PDCCH.
  • the detecting, by the relay device, the control channel R-PDCCH of the backhaul backhaul link includes:
  • the relay device acquires an OFDM symbol number of the orthogonal frequency division multiplexing technology occupied by the R-PDCCH, and a mapping of the R-PDCCH to the resource element RE.
  • the OFDM symbol number occupied by the R-PDCCH includes:
  • the R-PCFICH that is transmitted in the same time-frequency domain as the R-PDCCH, and the number of OFDM symbols occupied by the R-PDCCH is obtained by using the R-PCFICH.
  • the relay device When the relay device acquires the number of OFDM symbols occupied by the R-PDCCH according to a pre-configuration, the relay device further acquires a DL grant included in the R-PDCCH. a corresponding DCI format, a DCI format corresponding to the UL grant, and a resource element of the vacant R-PDCCH;
  • the relay device When the relay device acquires the number of OFDM symbols occupied by the R-PDCCH according to the R-PCFICH, the relay device further acquires a resource element corresponding to the R-PCFICH included in the R-PDCCH, and corresponds to the DL grant.
  • the DCI format, the DCI format corresponding to the UL grant, and the resource elements of the vacant R-PDCCH are the same as the R-PDCCH.
  • the OFDM symbol number occupied by the R-PDCCH includes:
  • the relay device acquires the number of OFDM symbols occupied by the R-PDCCH by using blind detection.
  • the number of OFDM symbols occupied by the R-PDCCH by the relay device by blind detection includes:
  • the relay device acquires a size of each DCI format transmitted by the R-PDCCH, and a code rate used by the network side to send a DCI format.
  • the relay device performs blind detection on the DCI format according to the obtained code rate used by the network side to send the DCI format.
  • the size of each DCI format that the relay device acquires by the R-PDCCH includes:
  • the relay device acquires the size of each DCI format transmitted by the R-PDCCH by using a system bandwidth and a type of the DCI format to be monitored.
  • the obtaining, by the relay device, the code rate used by the network side to send the DCI format includes: the relay device receiving the high layer signaling sent by the network side, where the high layer signaling carries the code used by the network side to send the DCI format Rate set; or
  • the relay device pre-configures the code rate set used by the network side to transmit the DCI format.
  • the relay device receives the notification sent by the network side, learns a subset of all CCE aggregation levels of the system, and performs blind detection on the R-PDCCH according to the subset.
  • the relay device in the embodiment of the present invention is specifically an RN.
  • the frequency domain resource used for transmitting the R-PDCCH may be pre-configured by the base station.
  • an RN specific R-PDCCH of one RN is exemplified by occupying two resource blocks in the frequency domain. Each resource block is composed of 12 resource elements, and each resource element is 15 kHz in the frequency domain.
  • Each resource element ie, a subframe
  • a 14 OFDM symbol is exemplified by a 14 OFDM symbol.
  • one subframe contains 14 OFDM symbols.
  • the RN needs to send control information to the R-UE and cannot receive the signal from the base station.
  • the RN receives the R-PDCCH and the R-PDSCH starting from the fourth OFDM symbol.
  • the donor eNB needs to send a CRS (Common Reference Signal) to the macro-UE. Therefore, the R-PDCCH and the R-PDSCH cannot occupy the resource element of the CRS, and the R-PDCCH of the RN specific needs to be set.
  • OFDM symbol transmission CRS In FIG. 5, four CRSs are used as an example, and multiple OFDM symbol transmission CRSs need to be set in the RN specific R-PDCCH resource block.
  • the eNB may not send the CRS on the R-PDSCH and the R-PDCCH.
  • the donor eNB may need to send multiple DCI formats (downlink control information format;) to one RN.
  • a DCI format can contain DL (Downlink, Downstream) grant
  • another DCI format can contain a UL (Uplink) grant.
  • the design of the RN specific R-PDCCH needs to consider the following aspects: the number of OFDM symbols occupied by the R-PDCCH, the mapping of the R-PDCCH/R-PDSCH to the RE (Rrsource Element), and the R-PDCCH/R- Demodulation of the PDSCH and blind detection of the R-PDCCH.
  • the following four aspects are introduced one by one.
  • the resources of the R-PDCCH in the frequency domain may be pre-configured by the base station. As shown in the example of FIG. 6, the R-PDCCH of the RN specific for each RN is set to occupy two resource blocks in the frequency domain.
  • the resources of the R-PDCCH in the time domain may be agreed or configured by the base station. If the resources of the R-PDCCH in the time domain are configured by the base station, the base station may transmit the R-PCFICH in a pre-defined position on the R-PDCCH, which is used to indicate the number of OFDM symbols occupied by the R-PDCCH in the time domain. As shown in FIG. 6, when the base station indicates the number of OFDM symbols occupied by the R-PDCCH in the time domain by transmitting the R-PCFICH on the R-PDCCH, the R-PCFICH is preset on the allocated R-PDCCH resource block.
  • the RN learns the pre-set location and receives the R-PCFICH at the location, and obtains the OFDM symbols occupied by the R-PDCCH and the R-PDSCH by demodulating the R-PCFICH, respectively, for the R- The PDCCH and the R-PDSCH are received.
  • the location of the R-PCFICH on the R-PDCCH resource block shown in FIG. 6 is only an example provided by the embodiment of the present invention. Those skilled in the art should understand that as long as the RN knows the location of the R-PCFICH in advance, the R-PCFICH also It can be set at the rest of the location on the R-PDCCH resource block.
  • the base station may not notify the RN R-PDCCH of the number of OFDM symbols occupied in the time domain.
  • the RN needs to perform blind detection on the length of the R-PDCCH, that is, the number of REs (Resource Elements) occupied by the R-PDCCH.
  • the following describes the mapping of R-PDCCH/R-PDSCH to RE:
  • the R-PDCCH can be mapped to the RE in a frequency domain first manner. Specifically, the R-PDCCH is first mapped to different frequency domains RE of one R-PDCCH OFDM symbol. In the case where the R-PDCCH is full on one R-PDCCH OFDM symbol, the R-PDCCH is continuously placed on the next R-PDCCH OFDM symbol.
  • the resource block of the R-PDCCH includes the RE of the R-PCFICH, the RE of the DCI format corresponding to the DL grant, and the UL grant.
  • the resource block of the R-PDCCH includes the DL grant.
  • the RN may learn the R-PCFICH or learn the number of OFDM symbols occupied by the R-PDCCH according to the semi-static configuration of the base station or according to the convention. Therefore, the RN may learn the resource elements of the R-PDSCH. starting point.
  • the RN does not know the number of OFDM symbols occupied by the R-PDCCH, the RN does not know the starting position of the R-PDSCH. To this end, the RN needs to determine the RE set occupied by the R-PDCCH by blind detection, and then further determine the RE set occupied by the R-PDSCH. As shown in FIG. 9, in this example, the base station does not indicate the number of OFDM symbols of the R-PDCCH through the R-PCFICH, nor does it have a semi-static number of OFDM symbols for the RN configuration or the agreed R-PDCCH.
  • the R-PDSCH can immediately use the next RE, and there is no waste of RE resources in the resource block of the R-PDCCH, that is, there is no empty RE.
  • the RN receives the signal sent by the base station, and demodulates the R-PDCCH/R-PDSCH, specifically Can be divided into the following two cases:
  • the RN may perform channel estimation on the R-PDCCH and the R-PDSCH according to the CRS, and then demodulate the R-PDCCH and the R-PDSCH.
  • the R-PDSCH may be pre-coded without precoding, or using codebook precoding, or using a non-codebook; if there is no precoding, the RN may use the CRS to demodulate the R-PDSCH; if using codebook precoding Then, the RN obtains the precoding codeword used by the current R-PDSCH carried in the R-PDCCH, and demodulates the R-PDSCH. If the non-codebook is used for precoding, the RN obtains R by using the non-codebook.
  • the corresponding DRS (dedicated reference signal) in the PDCCH demodulates the R-PDSCH.
  • the R-PDCCH may be precoded without precoding, or using codebook precoding, or using the same non-codebook as the R-PDSCH; the RN is demodulated by a corresponding CRS, DL grant or DRS.
  • the RN demodulates the R-PDCCH/R-PDSCH by using the corresponding DRS, and the DRS adopts the R-PDCCH/R in the same PRB.
  • the same precoding of PDSCH The first two cases are shown in Figure 6 to Figure 9. The latter case using DRS demodulation is shown in Figure 10.
  • the position and number of the DRS in FIG. 10 are only required for the example, and the embodiment of the present invention is not limited thereto, and can be flexibly set according to actual needs.
  • the other case is that there is no CRS.
  • both R-PDCCH and R-PDSCH need to be demodulated by DRS, as shown in Figure 11. Since there is no CRS at this time, the pilot overhead is the lowest. The performance of such an embodiment is optimal in terms of pilot overhead.
  • Each DCI format transmitted in the R-PDCCH can be transmitted using a different code rate. That is, one DCI format can be transmitted on a different number of R-PDCCH REs. to this end, When the RN performs blind detection on the R-PDCCH, it needs to know the following information:
  • the RN needs to know the size of the DCI format, which can be known by the system bandwidth and the type of DCI format that the RN needs to monitor.
  • the RN needs to know the code rate that may be used to transmit the DCI format, and then the RN blindly checks the DCI format by using different possible code rates.
  • the manner in which the RN obtains a code rate that the base station may use to send the DCI format includes: the base station semi-statically notifies the RN of a possible code rate set by using the high layer signaling, or uses the determined code rate set. At this time, the RN can learn the code rate that the base station may use to transmit the DCI format according to the high layer signaling sent by the base station or the agreed code rate set.
  • a CCE control channel element
  • the base station and the RN agree that the DCI format of the RN may use ⁇ 1 CCE, 2 CCEs, 3 CCEs, 4 CCEs ⁇ , Then, when the RN detects a DCI format on the R-PDCCH, it needs to perform 4 blind checks.
  • the first RE set Blind decoding 1 includes 1 CCE
  • the second, third, and fourth RE sets respectively include 2, 3, and 4 CCEs, where the starting RE of each RE set is R-PDCCH.
  • one CCE in this embodiment includes six REs, which is only convenient for description. In a real system, a CCE may include more or fewer REs.
  • the base station may also semi-statically notify the RN of a subset of all possible CCE sizes, and then the RN performs blind detection on the R-PDCCH with the configured CCE subset. For example, four CCE aggregation levels are supported in the system, such as ⁇ 1 CCE, 2 CCEs, 3 CCEs, 4 CCEs ⁇ .
  • the base station semi-statically informs the RN to perform blind detection on the R-PDCCH using ⁇ 1 CCE, 4 CCE ⁇ .
  • the RN After receiving the configuration of the base station, the RN performs blind detection on the DCI format included in the R-PDCCH by using one CCE and four CCEs.
  • the RN is in the R-PDCCH time-frequency resource
  • the control information of the R-PDCCH transmission is detected on the at least one subset, and the starting RE of the subset is the lowest or highest RE in the frequency domain of the starting OFDM symbol of the R-PDCCH time-frequency resource.
  • the number of OFDM symbols occupied by the R-PDCCH, the mapping of the R-PDCCH/R-PDSCH to the RE, the demodulation mode of the R-PDCCH/R-PDSCH, and the blind detection of the R-PDCCH are performed.
  • the method designing the dedicated control channel of the relay system satisfies the need for the R-PDCCH to be dedicated by one relay node.
  • An embodiment of the present invention provides a relay system control channel configuration device, as shown in FIG. 13, including:
  • the channel sending unit 10 is configured to send a control channel R-PDCCH to the serving relay device, including related control information of the relay device in the R-PDCCH, where the R-PDCCH is dedicated to the relay device R-PDCCH.
  • the channel configuration unit 20 is configured to configure an OFDM symbol number of the Orthogonal Frequency Division Multiplexing (OFDM) technology occupied by the R-PDCCH, and configure a mapping of the R-PDCCH to the resource element RE.
  • OFDM Orthogonal Frequency Division Multiplexing
  • the channel configuration unit 20 is configured to:
  • the channel configuration unit 20 is configured to:
  • the R-PDCCH is mapped to the resource element RE in a frequency domain first manner.
  • the channel configuration unit 20 is further configured to:
  • configuring the R-PDCCH includes a resource element corresponding to the R-PCFICH and a DCI corresponding to the DL grant. Format, DCI format corresponding to the UL grant, and resource elements of the vacant R-PDCCH;
  • configuring the R-PDCCH includes a DCI format corresponding to the DL grant, a DCI format corresponding to the UL grant, and a resource element of the vacant R-PDCCH;
  • An embodiment of the present invention provides a relay device, as shown in FIG. 14, including:
  • the detecting unit 30 is configured to detect a control channel R-PDCCH of the backhaul backhaul link, where the R-PDCCH includes related control information of the relay device, and the R-PDCCH is a dedicated R-PDCCH of the relay device.
  • the detecting unit 30 includes:
  • a symbol number obtaining subunit 31 configured to acquire an OFDM symbol number of the orthogonal frequency division multiplexing technology occupied by the R-PDCCH;
  • the mapping acquisition sub-unit 32 is configured to acquire a mapping of the R-PDCCH to the resource element RE.
  • the symbol number obtaining subunit 31 is specifically configured to:
  • the map acquisition subunit 32 is used to:
  • the relay device Obtaining, by the relay device, the DCI format corresponding to the DL grant included in the R-PDCCH, the DCI format corresponding to the UL grant, and the vacant Resource element of the R-PDCCH;
  • the relay device acquires the number of OFDM symbols occupied by the R-PDCCH according to the R-PCFICH, acquires a resource element corresponding to the R-PCFICH included in the R-PDCCH, and a DCI format corresponding to the DL grant, UL grant The corresponding DCI format, and the resource elements of the vacant R-PDCCH.
  • the symbol number acquisition subunit 31 is also used to:
  • the number of OFDM symbols occupied by the R-PDCCH is obtained by blind detection.
  • the symbol number obtaining subunit 31 is specifically configured to:
  • the DCI format is blindly checked according to the obtained code rate used by the network side to send the DCI format.
  • the symbol number obtaining subunit 31 is specifically configured to:
  • the size of each DCI format transmitted by the R-PDCCH is obtained by the system bandwidth and the type of DCI format to be monitored.
  • the symbol number obtaining subunit 31 is specifically configured to:
  • the symbol number obtaining subunit 31 is specifically configured to:
  • the number of OFDM symbols occupied by the R-PDCCH, the mapping of the R-PDCCH/R-PDSCH to the RE, the demodulation mode of the R-PDCCH/R-PDSCH, and the blind detection of the R-PDCCH The method designing the dedicated control channel of the relay system satisfies the need for the R-PDCCH to be dedicated by one relay node.
  • An embodiment of the present invention provides a method for transmitting a control channel of a relay system, including: a base station transmitting a control channel R-PDCCH to a relay device RN served by the base station, and including a control information DCI format of the RN in the R-PDCCH
  • the R-PDCCH is transmitted on the R-PDCCH time-frequency resource, and the R-PDCCH of the other RN is not transmitted on the time-frequency resource for transmitting the R-PDCCH of the RN.
  • the R-PDCCH time-frequency resource includes at least one orthogonal frequency division multiplexing OFDM symbol in the time domain, and includes at least one physical resource block PRB in the frequency domain, where the one PRB includes at least two resource elements RE;
  • the number of time domain OFDM symbols of the R-PDCCH time-frequency resource is configured by a base station; and the number of frequency domain physical resource blocks of the R-PDCCH time-frequency resource is configured by a base station.
  • the R-PDCCH is mapped to the R-PDCCH time-frequency resource in a frequency domain preferential manner.
  • the base station may send a data channel R-PDSCH to the RN, and a part of the R-PDSCH is sent in the same PRB as a part of the R-PDCCH.
  • the R-PDSCH transmitted in the same PRB and the R-PDCCH adopt the same precoding; the R-PDSCH and the R-PDCCH are demodulated by a dedicated pilot DRS, and the DRS
  • the same precoding as R-PDCCH and R-PDSCH is employed in the same PRB.
  • the control information of the RN includes downlink scheduling information DL grant and uplink scheduling information UL grant, and the DL grant and the UL grant are transmitted on different OFDM symbols of the R-PDCCH time-frequency resource.
  • An embodiment of the present invention provides a method for detecting a control channel of a relay system, including: a relay device RN receiving a control channel R-PDCCH transmitted by a base station, and including control information of the RN in the R-PDCCH, the R The PDCCH is transmitted on the R-PDCCH time-frequency resource, and the R-PDCCH of the other RN is not transmitted on the time-frequency resource for transmitting the R-PDCCH of the RN.
  • the R-PDCCH time-frequency resource includes at least one orthogonal frequency division multiplexing OFDM symbol in the time domain, and includes at least one physical resource block PRB in the frequency domain, where the one PRB includes at least two resource elements RE;
  • the number of time domain OFDM symbols of the R-PDCCH time-frequency resource is configured by a base station; and the number of frequency domain physical resource blocks of the R-PDCCH time-frequency resource is configured by a base station.
  • the R-PDCCH is mapped to the R-PDCCH time-frequency resource in a frequency domain preferential manner.
  • the method further includes:
  • the RN receives a data channel R-PDSCH transmitted by the base station, and a part of the R-PDSCH is transmitted in the same PRB as a part of the R-PDCCH.
  • the R-PDSCH transmitted in the same PRB and the R-PDCCH adopt the same precoding; the R-PDSCH and the R-PDCCH are demodulated by a dedicated pilot DRS, the DRS.
  • the same precoding as R-PDCCH and R-PDSCH is employed in the same PRB.
  • the control information of the RN includes a downlink scheduling information DL grant and an uplink scheduling information UL grant, and the DL grant and the UL grant are transmitted on different OFDM symbols of the R-PDCCH time-frequency resource.
  • the method further includes: detecting, by the RN, control information of the R-PDCCH transmission on at least a subset of the R-PDCCH time-frequency resources, where a starting RE of the subset is the R-PDCCH The lowest or highest RE in the frequency domain of the starting OFDM symbol of the frequency resource.
  • the method further includes: obtaining, by the RN, a size of control information transmitted by the R-PDCCH, and a code rate that may be used by the control information; and determining, by the RN, the size and the control of the acquired control information.
  • the control information is blindly checked at a code rate that the information may use.
  • a channel transmitting unit 40 configured to send a control channel R-PDCCH to a relay device RN served by the base station device, including control information DCI format of the RN in the R-PDCCH, where the R-PDCCH is in R-PDCCH
  • the PDCCH is transmitted on the time-frequency resource, and the R-PDCCH of the other RN is not transmitted on the time-frequency resource for transmitting the R-PDCCH of the RN. Also includes:
  • a configuration unit 41 configured to configure a number of time domain OFDM symbols of the R-PDCCH time-frequency resource, and a number of frequency domain physical resource blocks of the R-PDCCH time-frequency resource; the R-PDCCH time-frequency
  • the resource includes at least one orthogonal frequency division multiplexing OFDM symbol in the time domain, and includes at least one physical resource block PRB in the frequency domain, the one PRB including at least two resource elements RE.
  • the R-PDCCH is mapped to the R-PDCCH time-frequency resource in a frequency domain preferential manner.
  • the channel sending unit is further configured to: send a data channel R-PDSCH to the RN, where a part of the R-PDSCH is sent in the same PRB as a part of the R-PDCCH.
  • the precoding unit 42 is configured to use the same precoding for the R-PDSCH transmitted in the same PRB and the R-PDCCH.
  • the control information of the RN includes a downlink scheduling information DL grant and an uplink scheduling information UL grant, where the sending unit is further configured to: transmit the DL grant and the UL on different OFDM symbols of the R-PDCCH time-frequency resource. Grant.
  • An embodiment of the present invention provides a relay device, as shown in FIG. 16, including:
  • the receiving unit 50 is configured to receive a control channel R-PDCCH sent by the base station;
  • the R-PDCCH is received on the R-PDCCH time-frequency resource, and the R-PDCCH of the other RN is not transmitted on the time-frequency resource of the R-PDCCH that receives the RN;
  • the obtaining unit 51 is configured to acquire control information of the RN in the R-PDCCH.
  • the R-PDCCH time-frequency resource includes at least one orthogonal frequency division multiplexing in the time domain.
  • the OFDM symbol includes at least one physical resource block PRB in the frequency domain, and the one PRB includes at least two resource elements RE.
  • the R-PDCCH is mapped to the R-PDCCH time-frequency resource in a frequency domain preferential manner.
  • the receiving unit is further configured to: receive a data channel R-PDSCH sent by the base station, where a part of the R-PDSCH is sent in a same PRB as a part of the R-PDCCH.
  • the R-PDSCH transmitted in the same PRB adopts the same precoding as the R-PDCCH;
  • the acquiring unit is further configured to demodulate the R-PDSCH and the R by using dedicated pilot DRS.
  • - PDCCH the DRS adopts the same precoding as the R-PDCCH and the R-PDSCH in the same PRB.
  • the acquiring unit is further configured to: obtain downlink scheduling information DL grant and uplink scheduling information UL grant included in the control information of the RN, where the DL grant and the UL grant are on different OFDM symbols of the R-PDCCH time-frequency resource transmission.
  • the acquiring unit is further configured to: detect, by using at least one subset of the R-PDCCH time-frequency resources, control information about the R-PDCCH transmission, where a starting RE of the subset is the R-PDCCH time-frequency The lowest or highest RE in the frequency domain of the starting OFDM symbol of the resource.
  • the acquiring unit is further configured to: acquire a size of the control information that is transmitted by the R-PDCCH, and a code rate that the control information may use; the device further includes a blind detection unit, configured to use, according to the acquired control information, The size of the control and the code rate at which the control information may be used to blindly check the control information.
  • the computer software product is stored in a storage medium and includes a plurality of instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to perform the methods described in various embodiments of the present invention.
  • a computer device which may be a personal computer, a server, or a network device, etc.
  • modules in the apparatus in the embodiments may be distributed in the apparatus of the embodiment according to the description of the embodiments, or the corresponding changes may be located in one or more apparatuses different from the embodiment.
  • the modules of the above embodiments can be combined into one module, also It can be further split into multiple submodules.

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Description

中继系统控制信道发送方法、 检测方法及设备 本申请要求于 2009 年 9 月 29 日提交中国专利局, 申请号为 200910235533.7, 发明名称为 "中继系统控制信道配置方法、 检测方法及 设备" 的中国专利申请的优先权, 其全部内容通过引用结合在本申请中。 技术领域
本发明涉及通信领域, 尤其涉及一种中继系统控制信道发送方法、 检测方法及设备。 背景技术
RN ( Relay Node, 中继节点)的引入使得基于 Relay (中继)的移动 通信系统的无线链路有三条: eNB( evolved Node B,演进型基站)与 macro UE ( macro User Equipment, 宏用户设备 ) 间的直射链路 ( direct link ) 、 eNB与 RN间的回程链路 ( backhaul link )以及 RN与 R-UE (中继服务的 用户终端) 间的接入链路(Access link )。 考虑到无线通信的信号干扰限 制, 三条链路需要使用正交的无线资源。 在同一个频段上, 为了避免自 干扰, 中继节点不能同时发送和接收数据。 在 LTE-A ( Long Term Evolution- Advanced , 后续长期演进) 中, 中继节点可以通过 MFSBN ( Multicast Broadcast Single Frequency Network, 多播广播单频网络)子 帧的方式与其 donor eNB (源基站 ) 交互 backhaul数据, 如图 1所示。
具体的, 如图 2所示, 中继节点在一个 MBSFN子帧中, 向其服务 的用户终端 (R-UE ) 在一个或者两个 OFDM ( Orthogonal Frequency Division Multiplexing, 正交频分复用技术)符号上发送 PDCCH ( physical downlink control channel, 物理下行控制信道) 。 在本 MBSFN子帧的其 余 OFDM 符号上, 中继节点可以接收来自 donor eNB 的控制信息 ( R-PDCCH )和数据信息 ( R-PDSCH ( Physical Downlink Shared Channel, 物理下行共享信道) ) 。 在频域上, R-PDCCH可以在一些预先设置的资 源块集合上传输, 不同的中继节点可以共享这些 R-PDCCH资源块,并且 在这个资源块上通过盲检得到自己的下行调度信息 (DL grant)和上行调度 信息( UL grant ) , 例如图 2中 RN1与 RN2可以共享 R-PDCCH资源块。 中继节点根据在 R-PDCCH资源块上的盲检获取到的下行调度信息,获得 R-PDSCH 的资源分配指示。 基站可以在一个子帧中同时调度宏 UE (macro-UE)与中继节点, 只要他们的资源分配是正交的。 Macro-UE的下 行数据称为 PDSCH, 如图 2所示。
图 2所示的 R-PDCCH由多个中继节点共享, R-PDCCH也可以由一 个中继节点专用 (RN specific ) , 如图 3所示: 其中 RN1的 R-PDCCH 资源块由 RN1专用, 即每个用于传输 RN1的 R-PDCCH的资源块仅包括 RN1的 R-PDCCH。 在 RN1的 R-PDCCH上传输关于 RN1的控制信令, 包括 DL grant、 UL grant等。 其余的 R-PDCCH资源还可以存在, 并且可 以被几个中继节点共享, 例如由 RN2和 RN3共享。
但是,现有技术中还没有具体的中继节点专用 R-PDCCH的设计, 不 能满足 R-PDCCH也可以由一个中继节点专用的需要。 发明内容
本发明实施例提供了一种中继系统控制信道发送方法、 检测方法及 设备, 以实现设计中继节点专用 R-PDCCH。
本发明实施例提供了一种中继系统控制信道发送方法, 包括: 基站向其服务的中继设备 RN 发送控制信道 R-PDCCH, 在所述
R-PDCCH 内包括所述 RN的控制信息 DCI format, 所述 R-PDCCH在
R-PDCCH时频资源上发送, 在用于发送所述 RN的 R-PDCCH的时频资 源上不发送其他 RN的 R-PDCCH。
本发明实施例提供一种中继系统控制信道检测方法, 包括: 中继设备 RN接收基站发送的控制信道 R-PDCCH,在所述 R-PDCCH 内包括所述 RN的控制信息, 所述 R-PDCCH在 R-PDCCH时频资源上发 送, 在用于发送所述 RN的 R-PDCCH的时频资源上不发送其他 RN的 R-PDCCH。 本发明实施例提供一种基站设备, 包括:
信道发送单元, 用于向所述基站设备服务的中继设备 RN发送控制 信道 R-PDCCH, 在所述 R-PDCCH 内包括所述 RN 的控制信息 DCI format, 所述 R-PDCCH在 R-PDCCH时频资源上发送, 在用于发送所述 RN的 R-PDCCH的时频资源上不发送其他 RN的 R-PDCCH。 本发明实施例提供一种中继设备, 包括:
接收单元,用于接收基站发送的控制信道 R-PDCCH;所述 R-PDCCH 在 R-PDCCH时频资源上接收, 在接收所述中继设备 RN的 R-PDCCH的 时频资源上不发送其他 RN的 R-PDCCH;
获取单元, 用于获取所述 R-PDCCH内所述 RN的控制信息。 与现有技术相比, 本发明至少具有以下优点:
本发明实施例中, 通过根据 R-PDCCH 占用的 OFDM 符号数、 R-PDCCH/R-PDSCH 到 RE 的映射配置中继系统专用控制信道, 满足 R-PDCCH由一个中继设备专用的需要。 附图说明
为了更清楚地说明本发明实施例或现有技术中的技术方案, 下面将 对实施例或现有技术描述中所需要使用的附图作筒单地介绍, 显而易见 地, 下面描述中的附图仅仅是本发明的一些实施例, 对于本领域普通技 术人员来讲, 在不付出创造性劳动性的前提下, 还可以根据这些附图获 得其他的附图。
图 1是现有技术中中继节点可以通过 MFSBN子帧的方式与其 donor eNB交互 backhaul数据示意图;
图 2是现有技术中中继节点在一个 MBSFN子帧中向其服务的用户 终端发送 PDCCH示意图;
图 3是现有技术中 R-PDCCH也可以由一个中继节点专用的 PDCCH 示意图;
图 4a是本发明实施例提供的中继系统专用控制信道配置的方法的流 程示意图;
图 4b是本发明实施例提供的中继系统控制信道检测方法的流程示意 图;
图 5是本发明实施例中基站预先配置 R-PDCCH的频域资源的示意 图;
图 6是本发明实施例中基站通过在 R-PDCCH上传输 R-PCFICH指示 R-PDCCH在时域上所占用的 OFDM符号数的 R-PDCCH示意图;
图 7是本发明实施例中 R-PDCCH包括 DCI format的示意图; 图 8是本发明实施例中 R-PDCCH包括 DCI format的另一示意图; 图 9是本发明实施例中 R-PDCCH的另一示意图;
图 10是本发明实施例中使用 DRS解调时 R-PDCCH的示意图; 图 11是本发明实施例中使用 DRS解调时 R-PDCCH的另一示意图; 图 12是本发明实施例中盲检时 R-PDCCH的示意图;
图 13是本发明实施例提供的中继系统专用控制信道配置的设备的结 构示意图;
图 14是本发明实施例提供的中继的结构示意图。
图 15是本发明实施例提供的基站的结构示意图。
图 16是本发明实施例提供的中继的结构示意图。 具体实施方式
本发明实施例的核心思想在于: 根据 R-PDCCH占用的 OFDM符号 数、 R-PDCCH/R-PDSCH到 RE的映射配置中继系统专用控制信道。
本发明的实施例提供一种中继系统控制信道配置方法,如图 4a所示, 包括以下步骤:
步骤 401 , 所述网络侧配置所述 R-PDCCH占用的正交频分复用技术 OFDM符号数, 并配置所述 R-PDCCH到资源元素 RE的映射。
步骤 402, 网络侧向其服务中继设备发送控制信道 R-PDCCH, 在所 述 R-PDCCH内包括所述中继设备的控制信息,所述 R-PDCCH为所述中 继设备的专用 R-PDCCH。
其中, 所述网络侧配置所述 R-PDCCH占用的 OFDM符号数包括: 所述网络侧预先配置所述 R-PDCCH占用的 OFDM符号数; 或者 所述网络侧在与所述 R-PDCCH相同的时频区域传输 R-PCFICH (物 理控制格式指示信道), 所述 R-PCFICH与所述 R-PDCCH占用不同的资 源元素 RE,通过所述 R-PCFICH指示所述 R-PDCCH占用的 OFDM符号 数。
所述配置所述 R-PDCCH到资源元素 RE的映射具体为:
所述网络侧通过频域优先的方式将所述 R-PDCCH 映射到资源元素
RE。
所述配置所述 R-PDCCH到资源元素 RE的映射包括:
当所述 R-PDCCH占用的 OFDM符号数由 R-PCFICH指示时, 所述 网络侧配置所述 R-PDCCH 包括 R-PCFICH对应的资源元素、 DL grant 所对应的 DCI format ( Downlink Control Information format, 下行控制信 息格式)、 UL grant所对应的 DCI format, 以及空置的 R-PDCCH的资源 元素; 当所述 R-PDCCH占用的 OFDM符号数为半静态配置时, 所述网络 侧配置所述 R-PDCCH包括 DL grant所对应的 DCI format, UL grant所对 应的 DCI format、 以及空置的 R-PDCCH的资源元素;
当所述 R-PDCCH占用的 OFDM符号数由中继设备盲检确定时, 所 述网络侧配置所述 R-PDCCH不包括空置的 R-PDCCH的资源元素。 本发明实施例提供一种中继系统控制信道检测方法, 如图 4b所示, 包括以下步骤:
步骤 403 , 中继设备检测 backhaul回程链路的控制信道 R-PDCCH, 所述 R-PDCCH中包括所述中继设备的相关控制信息,所述 R-PDCCH为 所述中继设备的专用 R-PDCCH。
步骤 404, 中继设备获取 R-PDCCH中携带的控制信息。
其中, 所述中继设备检测 backhaul 回程链路的控制信道 R-PDCCH 包括:
所述中继设备获取所述 R-PDCCH 占用的正交频分复用技术 OFDM 符号数, 以及所述 R-PDCCH到资源元素 RE的映射。
所述中继设备获取所述 R-PDCCH 占用的正交频分复用技术 OFDM 符号数包括:
所述中继设备根据预先配置获取所述 R-PDCCH占用的 OFDM符号 数, 或者
所述中继设备根据预先配置获取在与所述 R-PDCCH相同的时频区 域传输的 R-PCFICH, 通过所述 R-PCFICH获取所述 R-PDCCH 占用的 OFDM符号数。
当所述中继设备根据预先配置获取所述 R-PDCCH占用的 OFDM符 号数时, 所述中继设备进一步获取所述 R-PDCCH中包括的 DL grant所 对应的 DCI format、 UL grant所对应的 DCI format、以及空置的 R-PDCCH 的资源元素;
当所述中继设备根据 R-PCFICH获取所述 R-PDCCH占用的 OFDM 符号数时, 所述中继设备进一步获取所述 R-PDCCH中包括的 R-PCFICH 对应的资源元素、 DL grant所对应的 DCI format, UL grant所对应的 DCI format, 以及空置的 R-PDCCH的资源元素。
所述中继设备获取所述 R-PDCCH 占用的正交频分复用技术 OFDM 符号数包括:
所述中继设备通过盲检获取所述 R-PDCCH占用的 OFDM符号数。 所述中继设备通过盲检获取所述 R-PDCCH占用的 OFDM符号数包 括:
所述中继设备获取所述 R-PDCCH传输的每个 DCI format的大小、 以及所述网络侧发送 DCI format使用的码率;
所述中继设备根据获取到的所述网络侧发送 DCI format使用的码率 对 DCI format进行盲检。
所述中继设备获取所述 R-PDCCH传输的每个 DCI format的大小包 括:
所述中继设备通过系统带宽以及需要监测的 DCI format的类型获取 所述 R-PDCCH传输的每个 DCI format的大小。
所述中继设备获取所述网络侧发送 DCI format使用的码率包括: 所述中继设备接收网络侧发送的高层信令, 所述高层信令中携带所 述网络侧发送 DCI format使用的码率集合; 或者
所述中继设备预先配置所述网络侧发送 DCI format使用的码率集 合。
所述中继设备通过盲检获取所述 R-PDCCH占用的 OFDM符号数包 括:
所述中继设备接收所述网络侧发送的通知, 获知系统所有 CCE聚合 等级的子集, 根据所述子集对 R-PDCCH进行盲检。 具体的, 本发明实施例中的中继设备具体为 RN, 对于 RN specific 的 R-PDCCH, 用于传输 R-PDCCH的频域资源可以由基站预先配置。 本 发明实施例中, 如图 5所示, 一个 RN的 RN specific R-PDCCH在频域上 以占用两个资源块为例进行说明。 其中, 每个资源块由 12个资源元素组 成, 每个资源元素在频域上为 15kHz。 每个资源元素 (即子帧) 以包含 14个 OFDM符号为例。
在 LTE/LTE-A系统中,以 normal CP为例,一个子帧包含 14个 OFDM 符号。 在前几个 OFDM符号上, RN需要向 R-UE发送控制信息, 不能接 收基站的信号。 本发明实施例中, 如图 5所示, RN从第 4个 OFDM符 号开始接收 R-PDCCH和 R-PDSCH。 同时, 考虑到 donor eNB需要向 macro-UE发送 CRS ( Common Reference Signal, 公用导频信号;), 因此, R-PDCCH 和 R-PDSCH 不能占用 CRS 的资源元素, RN specific 的 R-PDCCH中需要设置 OFDM符号传输 CRS。 在图 5中, CRS以 4个为 例,则 RN specific的 R-PDCCH资源块中需要设置多个 OFDM符号传输 CRS。
本发明实施例中, eNB也可以不在 R-PDSCH和 R-PDCCH上面发送 CRS, 例如 backhaul子帧在宏小区内时 eNB 不在 MBSFN子帧内发送 CRS。 在 R-PDCCH中, donor eNB可能需要向一个 RN发送多个 DCI format (下行控制信息格式;)。 例如, 一个 DCI format可以包含 DL ( Downlink, 下行) grant, 另一个 DCI format可以包含 UL ( Uplink, 上行) grant。 RN specific R-PDCCH的设计需要考虑以下方面: R-PDCCH所占用的 OFDM 符号数、 R-PDCCH/R-PDSCH到 RE ( Rrsource Element, 资源元素)的映 射(mapping ), R-PDCCH/R-PDSCH的解调以及 R-PDCCH的盲检。 下 面对这四方面逐一进行介绍。
首先介绍 R-PDCCH所占用的 OFDM符号数:
R-PDCCH在频域上的资源可以由基站预先配置,如图 6所示的例子, 设置每一 RN的 RN specific的 R-PDCCH在频域上占用两个资源块。
R-PDCCH在时域上的资源 (即 R-PDCCH所占用的 OFDM符号数 ) 可以是约定的,或者由基站配置。若 R-PDCCH在时域上的资源由基站配 置, 基站可以在 R-PDCCH上预先约定好的位置传输 R-PCFICH, 用于指 示 R-PDCCH在时域上所占用的 OFDM符号数。 如图 6所示, 当基站通 过在 R-PDCCH上传输 R-PCFICH指示 R-PDCCH在时域上所占用的 OFDM符号数时, R-PCFICH在所分配的 R-PDCCH资源块上预先设置的 与 RN对应的固定位置传输, RN获知该预先设置的位置并在该位置上接 收 R-PCFICH, 通过解调 R-PCFICH获取 R-PDCCH和 R-PDSCH各自所 占用的 OFDM符号, 分别对 R-PDCCH和 R-PDSCH进行接收。 当然, 图 6所示 R-PCFICH在 R-PDCCH资源块上的位置仅为本发明实施例提供 的一个例子,本领域普通技术人员应当理解只要 RN预先获知 R-PCFICH 的位置, R-PCFICH也可以设置在 R-PDCCH资源块上的其余位置上。
本发明实施例中, 基站也可以不通知 RN R-PDCCH在时域上所占用 的 OFDM符号数。 RN需要对 R-PDCCH的长度, 即 R-PDCCH所占用 RE ( Resource Element, 资源元素 ) 的数目进行盲检。 下面介绍 R-PDCCH/R-PDSCH到 RE的映射: R-PDCCH可以通过频域优先的方式映射到 RE上。具体的, R-PDCCH 首先映射到一个 R-PDCCH OFDM 符号的不同频域 RE 上。 在一个 R-PDCCH OFDM 符号上 R-PDCCH 放满的情况下, 继续在下一个 R-PDCCH OFDM符号上摆放 R-PDCCH。
当 R-PDCCH的 OFDM符号数可以由 R-PCFICH指示时, 如图 7所 示, R-PDCCH的资源块包括 R-PCFICH的 RE、 DL grant所对应的 DCI format的 RE、 UL grant所对应的 DCI format的 RE、以及一些空置的 RE。
当基站半静态的为 RN配置 R-PDCCH的 OFDM符号数(例如 2个 OFDM符号)或者 R-PDCCH的 OFDM符号数为约定时, 如图 8所示, R-PDCCH的资源块包括 DL grant所对应的 DCI format的 RE、 UL grant 所对应的 DCI format的 RE、 以及一些空置的 RE。
在图 7和图 8的实例中, RN可以通过解析 R-PCFICH或者根据基站 的半静态配置或者根据约定获知 R-PDCCH所占用的 OFDM符号数, 因 此, RN可以获知 R-PDSCH的资源元素的起始位置。
如果 RN不知道 R-PDCCH所占用的 OFDM符号数, 那么 RN也不 知道 R-PDSCH的起始位置。 为此, RN需要通过盲检确定 R-PDCCH所 占用的 RE集合, 然后进一步确定 R-PDSCH所占用的 RE集合。 如图 9 所示, 在该实例中, 基站没有通过 R-PCFICH指示 R-PDCCH的 OFDM 符号数,也没有半静态的给 RN配置或约定 R-PDCCH的 OFDM符号数。 此时, 当 R-PDCCH全部映射到 RE后, R-PDSCH可以紧接着使用下一 个 RE, 在 R-PDCCH的资源块中没有 RE资源浪费的情况, 即不存在空 置的 RE。 下面介绍 R-PDCCH/R-PDSCH的解调方式:
RN接收基站发送的信号, 对 R-PDCCH/R-PDSCH进行解调, 具体 的, 可以划分为以下两种情况:
一是 R-PDCCH中存在 CRS。
此时, RN可以根据 CRS对 R-PDCCH和 R-PDSCH作信道估计, 然 后对 R-PDCCH和 R-PDSCH解调。 其中, R-PDSCH可以没有预编码、 或者使用码本预编码、 或者使用非码本进行预编码; 如果没有预编码, 则 RN可以使用 CRS对 R-PDSCH进行解调; 如果使用码本预编码, 则 RN通过 R-PDCCH中的相应的 DL grant,获取其中携带的当前 R-PDSCH 使用的预编码码字, 对 R-PDSCH解调; 如果使用非码本进行预编码, 则 RN通过获取 R-PDCCH中相应的 DRS ( dedicated reference signal, 专用 导频)解调 R-PDSCH。 R-PDCCH可以没有预编码、 或者使用码本预编 码、 或者使用与 R-PDSCH相同的非码本进行预编码; RN通过相应的 CRS、 DL grant或者 DRS解调。 当 R-PDCCH使用与 R-PDSCH相同的非 码本进行预编码, RN通过相应的 DRS对 R-PDCCH/R-PDSCH进行解调, DRS在所述相同的 PRB中采用与 R-PDCCH/R-PDSCH相同的预编码。 前两种情况如图 6至图 9所示, 后一种使用 DRS解调的情况如图 10所 示。 图 10中 DRS的位置与数目仅为举例需要, 本发明实施例对此并不 限制, 可以根据实际需要灵活设置。
另一种情况是不存在 CRS。
此时, R-PDCCH和 R-PDSCH都需要通过 DRS进行解调, 如图 11 所示。 由于此时不存在 CRS, 因此导频的开销最低。 从导频开销而言, 此种实施例的性能最佳。 下面介绍 RN对 R-PDCCH的盲检:
在 R-PDCCH传输的每个 DCI format, 可以使用不同的码率发送。 也 就是说,一个 DCI format可以在不同数目的 R-PDCCH RE上传输。为此, RN在对 R-PDCCH进行盲检时, 需要获知以下信息:
首先, RN需要获知 DCI format的大小, 具体可以通过系统带宽以及 RN需要监测的 DCI format的类型获知。
其次, RN需要知道发送该 DCI format可能使用的码率, 然后 RN通 过使用不同可能的码率对 DCI format进行盲检。
具体的, RN获取基站发送 DCI format可能使用的码率的方式包括: 基站通过高层信令半静态的通知 RN可能的码率集合, 或者使用约 定的码率集合。 此时, RN可以根据基站发送的高层信令或者约定的码率 集合获知基站发送 DCI format可能使用的码率。
例如, 4叚设一个 CCE ( control channel element, 控制信道元素)包括 若干个 RE,并且基站与 RN约定 RN 的 DCI format可能使用 { 1个 CCE, 2个 CCE, 3个 CCE, 4个 CCE} ,则 RN在对 R-PDCCH上的一个 DCI format 进行检测时, 需要作 4次盲检。 以一个 CCE由 6个 RE组成为例, 如图 12所示, RN在检测一个 DCI format的时候, 需要在 4个 RE集合上作盲 检( blind decoding )。 其中, 第一个 RE集合 blind decoding 1包括 1个 CCE, 第二、 三、 四个 RE集合分别包括 2个、 3个、 4个 CCE, 其中, 每个 RE集合的起始 RE为 R-PDCCH时频资源的起始 OFDM符号中频域 最高的 RE。 需要说明的是本实施例中一个 CCE包含 6个 RE, 仅为描述 方便。 在实际系统中, 一个 CCE可能包括更多或者更少的 RE。
基站也可以半静态的通知 RN所有可能的 CCE大小的一个子集, 然 后 RN用所配置的 CCE子集对 R-PDCCH进行盲检。 例如, 系统中支持 4种 CCE聚合等级, 例如 { 1个 CCE, 2个 CCE, 3个 CCE, 4个 CCE}。 基 站半静态的通知 RN使用 { 1个 CCE, 4个 CCE}对 R-PDCCH进行盲检。 RN接收到基站的配置后, 使用 1个 CCE和 4个 CCE对 R-PDCCH包括 的 DCI format进行盲检。 本发明实施例中, RN在 R-PDCCH时频资源的 至少一个子集上检测 R-PDCCH传输的控制信息, 该子集的起始 RE为 R-PDCCH时频资源的起始 OFDM符号中频域最低或者最高的 RE。
通过采用本发明实施例提供的方法, 根据 R-PDCCH 占用的 OFDM 符号数、 R-PDCCH/R-PDSCH到 RE的映射、 R-PDCCH/R-PDSCH的解 调方式以及 R-PDCCH 的盲检方式设计中继系统专用控制信道, 满足 R-PDCCH也可以由一个中继节点专用的需要。 本发明实施例提供一种中继系统控制信道配置设备, 如图 13所示, 包括:
信道发送单元 10,用于向服务中继设备发送控制信道 R-PDCCH,在 所述 R-PDCCH内包括所述中继设备的相关控制信息,所述 R-PDCCH为 所述中继设备的专用 R-PDCCH。
还包括:
信道配置单元 20, 用于配置所述 R-PDCCH占用的正交频分复用技 术 OFDM符号数, 并配置所述 R-PDCCH到资源元素 RE的映射。
所述信道配置单元 20用于:
预先配置所述 R-PDCCH占用的 OFDM符号数; 或者
在与所述 R-PDCCH相同的时频区域传输 R-PCFICH,所述 R-PCFICH 与所述 R-PDCCH占用不同的资源元素 RE, 通过所述 R-PCFICH指示所 述 R-PDCCH占用的 OFDM符号数。
所述信道配置单元 20用于:
通过频域优先的方式将所述 R-PDCCH映射到资源元素 RE上。
所述信道配置单元 20还用于:
当所述 R-PDCCH占用的 OFDM符号数由 R-PCFICH指示时, 配置 所述 R-PDCCH包括 R-PCFICH对应的资源元素、 DL grant所对应的 DCI format、 UL grant所对应的 DCI format、 以及空置的 R-PDCCH的资源元 素;
当所述 R-PDCCH占用的 OFDM符号数为半静态配置时, 配置所述 R-PDCCH包括 DL grant所对应的 DCI format、 UL grant所对应的 DCI format, 以及空置的 R-PDCCH的资源元素;
当所述 R-PDCCH占用的 OFDM符号数由中继设备盲检确定时, 配 置所述 R-PDCCH不包括空置的 R-PDCCH的资源元素。 本发明实施例提供一种中继设备, 如图 14所示, 包括:
检测单元 30, 用于检测 backhaul回程链路的控制信道 R-PDCCH, 所述 R-PDCCH中包括中继设备的相关控制信息,所述 R-PDCCH为所述 中继设备的专用 R-PDCCH。
所述检测单元 30包括:
符号数获取子单元 31 , 用于获取所述 R-PDCCH占用的正交频分复 用技术 OFDM符号数;
映射获取子单元 32,用于获取所述 R-PDCCH到资源元素 RE的映射。 所述符号数获取子单元 31具体用于:
根据预先配置获取所述 R-PDCCH占用的 OFDM符号数, 或者 根据预先配置获取在与所述 R-PDCCH 相同的时频区域传输的 R-PCFICH, 所述 R-PCFICH与所述 R-PDCCH占用不同的资源元素 RE, 通过所述 R-PCFICH获取所述 R-PDCCH占用的 OFDM符号数。
所述映射获取子单元 32用于:
当所述中继设备根据预先配置获取所述 R-PDCCH占用的 OFDM符 号数时, 获取所述 R-PDCCH中包括的 DL grant所对应的 DCI format, UL grant所对应的 DCI format、 以及空置的 R-PDCCH的资源元素; 当所述中继设备根据 R-PCFICH获取所述 R-PDCCH占用的 OFDM 符号数时, 获取所述 R-PDCCH中包括的 R-PCFICH对应的资源元素、 DL grant所对应的 DCI format, UL grant所对应的 DCI format, 以及空置 的 R-PDCCH的资源元素。
所述符号数获取子单元 31还用于:
通过盲检获取所述 R-PDCCH占用的 OFDM符号数。
所述符号数获取子单元 31具体用于:
获取所述 R-PDCCH传输的每个 DCI format的大小、 以及所述网络 侧发送 DCI format使用的码率;
根据获取到的所述网络侧发送 DCI format使用的码率对 DCI format 进行盲检。
所述符号数获取子单元 31具体用于:
通过系统带宽以及需要监测的 DCI format的类型获取所述 R-PDCCH 传输的每个 DCI format的大小。
所述符号数获取子单元 31具体用于:
接收网络侧发送的高层信令, 所述高层信令中携带所述网络侧发送 DCI format使用的码率集合; 或者
预先配置所述网络侧发送 DCI format使用的码率集合。
所述符号数获取子单元 31具体用于:
接收所述网络侧发送的通知, 获知系统所有 CCE聚合等级的子集, 根据所述子集对 R-PDCCH进行盲检。
通过采用本发明实施例提供的设备, 根据 R-PDCCH 占用的 OFDM 符号数、 R-PDCCH/R-PDSCH到 RE的映射、 R-PDCCH/R-PDSCH的解 调方式以及 R-PDCCH 的盲检方式设计中继系统专用控制信道, 满足 R-PDCCH也可以由一个中继节点专用的需要。 本发明实施例提供一种中继系统控制信道的发送方法, 包括: 基站向其服务的中继设备 RN 发送控制信道 R-PDCCH, 在所述 R-PDCCH 内包括所述 RN的控制信息 DCI format, 所述 R-PDCCH在 R-PDCCH时频资源上发送, 在用于发送所述 RN的 R-PDCCH的时频资 源上不发送其他 RN的 R-PDCCH。
其中,所述 R-PDCCH时频资源在时域上包括至少一个正交频分复用 OFDM符号, 在频域上包括至少一个物理资源块 PRB , 所述一个 PRB至 少包括两个资源元素 RE;所述 R-PDCCH时频资源的时域 OFDM符号的 个数由基站配置;所述 R-PDCCH时频资源的频域物理资源块的个数由基 站配置。
该方法中, 所述 R-PDCCH 通过频域优先的方式映射到所述 R-PDCCH时频资源。
该方法中, 进一步的, 所述基站可以向所述 RN 发送数据信道 R-PDSCH,所述 R-PDSCH的一部分与所述 R-PDCCH的一部分在相同的 PRB中发送。 其中, 在所述相同的 PRB中传输的所述 R-PDSCH与所述 R-PDCCH采用相同的预编码; 所述 R-PDSCH与所述 R-PDCCH由专用 导频 DRS解调, 所述 DRS在所述相同的 PRB 中采用与 R-PDCCH和 R-PDSCH相同的预编码。
所述 RN的控制信息包括下行调度信息 DL grant和上行调度信息 UL grant,所述 DL grant和 UL grant在所述 R-PDCCH时频资源的不同 OFDM 符号上传输。 本发明实施例提供一种中继系统控制信道的检测方法, 包括: 中继设备 RN接收基站发送的控制信道 R-PDCCH,在所述 R-PDCCH 内包括所述 RN的控制信息, 所述 R-PDCCH在 R-PDCCH时频资源上发 送, 在用于发送所述 RN的 R-PDCCH的时频资源上不发送其他 RN的 R-PDCCH。 其中,所述 R-PDCCH时频资源在时域上包括至少一个正交频分复用 OFDM符号, 在频域上包括至少一个物理资源块 PRB , 所述一个 PRB至 少包括两个资源元素 RE;所述 R-PDCCH时频资源的时域 OFDM符号的 个数由基站配置;所述 R-PDCCH时频资源的频域物理资源块的个数由基 站配置。所述 R-PDCCH通过频域优先的方式映射到所述 R-PDCCH时频 资源。
该方法进一步包括:
所述 RN接收所述基站发送的数据信道 R-PDSCH, 所述 R-PDSCH 的一部分与所述 R—PDCCH的一部分在相同的 PRB中发送。 其中, 在所 述相同的 PRB中传输的所述 R-PDSCH与所述 R-PDCCH采用相同的预 编码;所述 R-PDSCH与所述 R-PDCCH由专用导频 DRS解调,所述 DRS 在所述相同的 PRB中采用与 R-PDCCH和 R-PDSCH相同的预编码。
所述 RN的控制信息包括下行调度信息 DL grant和上行调度信息 UL grant,所述 DL grant和 UL grant在所述 R-PDCCH时频资源的不同 OFDM 符号上传输。
该方法中还包括:所述 RN在所述 R-PDCCH时频资源的至少一个子 集上检测所述 R-PDCCH传输的控制信息, 所述子集的起始 RE为所述 R-PDCCH时频资源的起始 OFDM符号中频域最低或者最高的 RE。
该方法中还包括:所述 RN获取所述 R-PDCCH传输的控制信息的大 小、 以及所述控制信息可能使用的码率; 所述 RN根据获取到的所述控 制信息的大小和所述控制信息可能使用的码率对所述控制信息进行盲 检。 本发明实施例提供一种基站设备, 如图 15所示, 包括:
信道发送单元 40, 用于向所述基站设备服务的中继设备 RN发送控 制信道 R-PDCCH, 在所述 R-PDCCH 内包括所述 RN的控制信息 DCI format, 所述 R-PDCCH在 R-PDCCH时频资源上发送, 在用于发送所述 RN的 R-PDCCH的时频资源上不发送其他 RN的 R-PDCCH。 还包括:
配置单元 41 , 用于配置所述 R-PDCCH时频资源的时域 OFDM符号 的个数, 以及所述 R-PDCCH 时频资源的频域物理资源块的个数; 所述 R-PDCCH时频资源在时域上包括至少一个正交频分复用 OFDM符号, 在频域上包括至少一个物理资源块 PRB, 所述一个 PRB至少包括两个资 源元素 RE。
其中,所述 R-PDCCH通过频域优先的方式映射到所述 R-PDCCH时 频资源。
所述信道发送单元还用于: 向所述 RN发送数据信道 R-PDSCH, 所 述 R-PDSCH的一部分与所述 R-PDCCH的一部分在相同的 PRB中发送。
还包括:
预编码单元 42, 用于对所述相同的 PRB中传输的所述 R-PDSCH与 所述 R-PDCCH采用相同的预编码。
其中, 所述 RN的控制信息包括下行调度信息 DL grant和上行调度 信息 UL grant, 所述发送单元还用于: 在所述 R-PDCCH时频资源的不同 OFDM符号上传输所述 DL grant和 UL grant。 本发明实施例提供一种中继设备, 如图 16所示, 包括:
接收单元 50 , 用于接收基站发送的控制信道 R-PDCCH ; 所述
R-PDCCH在 R-PDCCH时频资源上接收, 在接收所述 RN的 R-PDCCH 的时频资源上不发送其他 RN的 R-PDCCH;
获取单元 51 , 用于获取所述 R-PDCCH内所述 RN的控制信息。 其中,所述 R-PDCCH时频资源在时域上包括至少一个正交频分复用
OFDM符号, 在频域上包括至少一个物理资源块 PRB , 所述一个 PRB至 少包括两个资源元素 RE。 所述 R-PDCCH通过频域优先的方式映射到所 述 R-PDCCH时频资源。
所述接收单元还用于: 接收所述基站发送的数据信道 R-PDSCH, 所 述 R-PDSCH的一部分与所述 R-PDCCH的一部分在相同的 PRB中发送。 在所述相同的 PRB中传输的所述 R-PDSCH与所述 R-PDCCH采用相 同的预编码; 所述获取单元还用于, 通过专用导频 DRS 解调所述 R-PDSCH 与所述 R-PDCCH, 所述 DRS 在所述相同的 PRB 中采用与 R-PDCCH和 R-PDSCH相同的预编码。
所述获取单元还用于:获取所述 RN的控制信息包括的下行调度信息 DL grant和上行调度信息 UL grant, 所述 DL grant和 UL grant在所述 R-PDCCH时频资源的不同 OFDM符号上传输。
所述获取单元还用于:在所述 R-PDCCH时频资源的至少一个子集上 检测所述 R-PDCCH 传输的控制信息, 所述子集的起始 RE 为所述 R-PDCCH时频资源的起始 OFDM符号中频域最低或者最高的 RE。
所述获取单元还用于: 获取所述 R-PDCCH传输的控制信息的大小、 以及所述控制信息可能使用的码率; 该设备还包括盲检单元, 用于根据 获取到的所述控制信息的大小和所述控制信息可能使用的码率对所述控 制信息进行盲检。 通过以上的实施方式的描述, 本领域的技术人员可以清楚地了解到 本发明可借助软件加必需的通用硬件平台的方式来实现, 当然也可以通 过硬件, 但很多情况下前者是更佳的实施方式。 基于这样的理解, 本发
的形式体现出来, 该计算机软件产品存储在一个存储介质中, 包括若干 指令用以使得一台计算机设备(可以是个人计算机, 服务器, 或者网络 设备等)执行本发明各个实施例所述的方法。
本领域技术人员可以理解附图只是一个优选实施例的示意图, 附图 中的模块或流程并不一定是实施本发明所必须的。
本领域技术人员可以理解实施例中的装置中的模块可以按照实施例 描述进行分布于实施例的装置中, 也可以进行相应变化位于不同于本实 施例的一个或多个装置中。 上述实施例的模块可以合并为一个模块, 也 可以进一步拆分成多个子模块。
上述本发明实施例序号仅仅为了描述, 不代表实施例的优劣。
以上公开的仅为本发明的几个具体实施例, 但是, 本发明并非局限 于此, 任何本领域的技术人员能思之的变化都应落入本发明的保护范围。

Claims

权利要求
1、 一种中继系统控制信道的发送方法, 其特征在于, 包括: 基站向其服务的中继设备 RN发送控制信道 R-PDCCH, 在所述
R-PDCCH内包括所述 RN的控制信息 DCI format, 所述 R-PDCCH 在 R-PDCCH时频资源上发送, 在用于发送所述 RN的 R-PDCCH的 时频资源上不发送其他 RN的 R-PDCCH。
2、 如权利要求 1所述的方法, 其特征在于:
所述 R-PDCCH 时频资源在时域上包括至少一个正交频分复用 OFDM符号,在频域上包括至少一个物理资源块 PRB,所述一个 PRB 至少包括两个资源元素 RE;
3、 如权利要求 1所述的方法, 其特征在于, 进一步包括: 所述 R-PDCCH通过频域优先的方式映射到所述 R-PDCCH时频 资源。
4、 如权利要求 1所述的方法, 其特征在于, 进一步包括: 所述基站向所述 RN发送数据信道 R-PDSCH,所述 R-PDSCH的 一部分与所述 R-PDCCH的一部分在相同的 PRB中发送。
5、 如权利要求 4所述的方法, 其特征在于, 进一步包括: 在所述相同的 PRB中传输的所述 R-PDSCH与所述 R-PDCCH采 用相同的预编码;
所述 R-PDSCH与所述 R-PDCCH由专用导频 DRS解调, 所述 DRS在所述相同的 PRB中采用与 R-PDCCH和 R-PDSCH相同的预编 码。
6、 如权利要求 2所述的方法, 其特征在于, 进一步包括: 所述 RN的控制信息包括下行调度信息 DL grant和上行调度信息 UL grant, 所述 DL grant和 UL grant在所述 R-PDCCH时频资源的不 同 OFDM符号上传输。
7、 一种中继系统控制信道的检测方法, 其特征在于, 包括: 中继设备 RN 接收基站发送的控制信道 R-PDCCH , 在所述 R-PDCCH内包括所述 RN的控制信息,所述 R-PDCCH在 R-PDCCH 时频资源上发送, 在用于发送所述 RN的 R-PDCCH的时频资源上不 发送其他 RN的 R-PDCCH。
8、 如权利要求 7所述的方法, 其特征在于:
所述 R-PDCCH 时频资源在时域上包括至少一个正交频分复用 OFDM符号,在频域上包括至少一个物理资源块 PRB,所述一个 PRB 至少包括两个资源元素 RE;
Figure imgf000024_0001
9、 如权利要求 7所述的方法, 其特征在于, 进一步包括: 所述 R-PDCCH通过频域优先的方式映射到所述 R-PDCCH时频 资源。
10、 如权利要求 7所述的方法, 其特征在于, 进一步包括: 所述 RN 接收所述基站发送的数据信道 R-PDSCH , 所述
R-PDSCH的一部分与所述 R-PDCCH的一部分在相同的 PRB中发送。
11、 如权利要求 10所述的方法, 其特征在于, 进一步包括: 在所述相同的 PRB中传输的所述 R-PDSCH与所述 R-PDCCH采 用相同的预编码;
所述 R-PDSCH与所述 R-PDCCH由专用导频 DRS解调, 所述 DRS在所述相同的 PRB中采用与 R-PDCCH和 R-PDSCH相同的预编 码。
12、 如权利要求 8所述的方法, 其特征在于, 进一步包括: 所述 RN的控制信息包括下行调度信息 DL grant和上行调度信息
UL grant, 所述 DL grant和 UL grant在所述 R-PDCCH时频资源的不 同 OFDM符号上传输。
13、 如权利要求 8所述的方法, 其特征在于, 进一步包括: 所述 RN在所述 R-PDCCH时频资源的至少一个子集上检测所述
R-PDCCH传输的控制信息, 所述子集的起始 RE为所述 R-PDCCH 时频资源的起始 OFDM符号中频域最低或者最高的 RE。
14、 如权利要求 8所述的方法, 其特征在于, 进一步包括: 所述 RN获取所述 R-PDCCH传输的控制信息的大小、 以及所述 控制信息可能使用的码率;
所述 RN根据获取到的所述控制信息的大小和所述控制信息可能 使用的码率对所述控制信息进行盲检。
15、 一种基站设备, 其特征在于, 包括:
信道发送单元, 用于向所述基站设备服务的中继设备 RN发送控 制信道 R-PDCCH,在所述 R-PDCCH内包括所述 RN的控制信息 DCI format, 所述 R-PDCCH在 R-PDCCH时频资源上发送, 在用于发送 所述 RN的 R-PDCCH的时频资源上不发送其他 RN的 R-PDCCH。
16、 如权利要求 15所述的基站设备, 其特征在于, 还包括: 配置单元,用于配置所述 R-PDCCH时频资源的时域 OFDM符号 的个数, 以及所述 R-PDCCH时频资源的频域物理资源块的个数; 所 述 R-PDCCH 时频资源在时域上包括至少一个正交频分复用 OFDM 符号, 在频域上包括至少一个物理资源块 PRB, 所述一个 PRB至少 包括两个资源元素 RE。
17、如权利要求 15所述的基站设备,其特征在于,所述 R-PDCCH 通过频域优先的方式映射到所述 R-PDCCH时频资源。
18、 如权利要求 15所述的基站设备, 其特征在于, 所述信道发 送单元还用于: 向所述 RN发送数据信道 R-PDSCH, 所述 R-PDSCH 的一部分与所述 R—PDCCH的一部分在相同的 PRB中发送。
19、 如权利要求 18所述的基站设备, 其特征在于, 还包括预编 码单元, 用于对所述相同的 PRB 中传输的所述 R-PDSCH 与所述 R-PDCCH采用相同的预编码。
20、 如权利要求 16所述的基站设备, 其特征在于, 所述 RN的 控制信息包括下行调度信息 DL grant和上行调度信息 UL grant,
所述发送单元还用于: 在所述 R-PDCCH时频资源的不同 OFDM 符号上传输所述 DL grant和 UL grant。
21、 一种中继设备, 其特征在于, 包括:
接收单元, 用于接收基站发送的控制信道 R-PDCCH; 所述 R-PDCCH在 R-PDCCH时频资源上接收,在接收所述 RN的 R-PDCCH 的时频资源上不发送其他 RN的 R-PDCCH;
获取单元, 用于获取所述 R-PDCCH内所述 RN的控制信息。
22、 如权利要求 21所述的中继设备, 其特征在于,
所述 R-PDCCH 时频资源在时域上包括至少一个正交频分复用 OFDM符号,在频域上包括至少一个物理资源块 PRB,所述一个 PRB 至少包括两个资源元素 RE。
23、 如权利要求 21所述的中继设备, 其特征在于,
所述 R-PDCCH通过频域优先的方式映射到所述 R-PDCCH时频 资源。
24、 如权利要求 21所述的中继设备, 其特征在于,
所述接收单元还用于:接收所述基站发送的数据信道 R-PDSCH, 所述 R-PDSCH的一部分与所述 R-PDCCH的一部分在相同的 PRB中 发送。
25、 如权利要求 24所述的中继设备, 其特征在于, 在所述相同 的 PRB 中传输的所述 R-PDSCH与所述 R-PDCCH采用相同的预编 码;
所述获取单元还用于,通过专用导频 DRS解调所述 R-PDSCH与 所述 R-PDCCH, 所述 DRS在所述相同的 PRB中采用与 R-PDCCH 和 R-PDSCH相同的预编码。
26、 如权利要求 22所述的中继设备, 其特征在于,
所述获取单元还用于: 获取所述 RN的控制信息包括的下行调度 信息 DL grant和上行调度信息 UL grant, 所述 DL grant和 UL grant 在所述 R-PDCCH时频资源的不同 OFDM符号上传输。
27、 如权利要求 22所述的中继设备, 其特征在于,
所述获取单元还用于: 在所述 R-PDCCH时频资源的至少一个子 集上检测所述 R-PDCCH传输的控制信息, 所述子集的起始 RE为所 述 R-PDCCH时频资源的起始 OFDM符号中频域最低或者最高的 RE。
28、 如权利要求 22所述的中继设备, 其特征在于,
所述获取单元还用于: 获取所述 R-PDCCH传输的控制信息的大 小、 以及所述控制信息可能使用的码率;
该设备还包括盲检单元,用于根据获取到的所述控制信息的大小 和所述控制信息可能使用的码率对所述控制信息进行盲检。
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