WO2011038528A1

WO2011038528A1 - Resource scheduling method and relay node

Info

Publication number: WO2011038528A1
Application number: PCT/CN2009/001106
Authority: WO
Inventors: 蒋琦; 沈钢; 郑武
Original assignee: 上海贝尔股份有限公司; 阿尔卡特朗讯
Priority date: 2009-09-29
Filing date: 2009-09-29
Publication date: 2011-04-07
Also published as: CN102474334B; CN102474334A

Abstract

A resource scheduling method and a corresponding relay node (RN) are disclosed by the present invention. Said method includes the following steps: the subframe containing downlink backhaul link information is received from an enhanced Node B (eNB); resource scheduling information is extracted from the subframe; according to the resource scheduling information extracted, the resource scheduling is performed for the access link between a RN and the user equipment (UE) it serves. According to the present invention, a resource scheduling indication mechanism between the eNB and the RN is provided, so that the RN can, according to the information, learn which resources can be used for access link transmission between itself and the UE. Consequently, resources can be scheduled rationally, the interference between resources is avoided or minimized, RN performance gain is increased, and at the same time, frequency spectrum resources are fully utilized.

Description

Resource scheduling method and relay node

Technical field

Embodiments of the present invention relate to the field of communications technologies, and in particular, to resource scheduling processing in a Type I Relay backhaul link design in a 3GPP LTE-Advanced system, and a resource is proposed according to the present invention. The scheduling method and the corresponding relay node, in which the resource scheduling information is provided to the relay node, and the resource scheduling between the eNB and the RN is coordinated to avoid possible interference between the resources. Background technique

3GPP proposed a Type I relay backhaul link design at its RAN1 #57, #57bis and #58 conferences. For details, please refer to the conference document (R1 - 092960, "Type I backhaul link", Ericssoa NEC, Samsung, Motorola , Panasonic, RIM, LGE, Nokia, Nokia Siemens, Qualcomm. Huawei, Alcatel-Lucent, CATT, Texas Instruments, RANI #57bis, June 2009; and Rl-093722, "Text proposal to correct relaying text in TR36.912 ", Ericsson, Panasonic, NEC, Texas Instrument, RANI #58, August 2009). In this design, a new physical control information R-PDCCH (R-Physical Downlink Control Channel) is proposed for downlink backhaul data (R-PDSCH, R-physical downlink shared channel) and uplink backhaul data ( R-PUSCH, R- Physical Uplink Shared Channel), semi-downlink and uplink resources are allocated dynamically or "semi-permanently/statically" in semi-statically allocated subframes. The R-PDCCH is transmitted by a subset of the OFDM symbols in the subframe containing the downlink backhaul link information, and the subset may also include the entire set of OFDM symbols available for the backhaul link.

At the 3GPP RAN1 #58 conference, various technical solutions for maximizing the performance gain of Type I relays are discussed (see R 1 -093114, "Techniques to Maximize Type I Relay Gains", Qualcomm Europe, RANI #58, August 2009). According to these technical solutions and the research by the inventors of the present application, the direct link (eNB-UE) resource allocated to the user equipment (UE) served by the eNB and the access link allocated to the UE served by the RN (RN- UE) There may be interference between resources. Since the transmission power of the direct link (eNB-UE) is generally larger than that of the access link (RN-UE), if the resources of the direct link (eNB-UE) and the access link (RN) -UE) resources overlap or partially intersect Overlap, the direct link (eNB-UE) has a negative interference to the access link (RN-UE), which is one of the main disadvantages for the performance of the Type I relay system. In order to achieve the high performance gain of the Type I relay system, some effective interference coordination methods must be applied in the Type I relay system to avoid or mitigate direct link (eNB-UE) resources and access links (RN-UE). Interference between resources.

However, in the currently proposed Type I relay system design, the above resource interference problem has not been considered. The eNB and the RN perform resource scheduling independently of each other. When the eNB allocates resources for the direct link between the eNB and the UE it serves, it does not know or consider which resources the RN needs for the RN-UE. At the same time, the RN does not know or consider which resources the eNB needs or uses for the eNB-UE direct chain when allocating resources for the access link between the RN and the UE it serves. road. Therefore, when there is overlap or interference between these resources, the eNB and the RN cannot know or solve it.

A resource scheduling/allocation indication mechanism is needed to provide information about resource scheduling between the eNB and the RN, so that one or both parties can perform their own resource scheduling while taking into account the resource scheduling situation of the other party, thereby avoiding Or mitigate the occurrence of resource interference and improve the performance gain of the relay node. Summary of the invention

An embodiment of the present invention aims to propose a resource scheduling method and a corresponding relay node.

According to an aspect of the present invention, a resource scheduling method in a relay node RN is provided, including: receiving a subframe including downlink backhaul link information from a base station eNB; extracting resource scheduling information from the subframe; and extracting the resource according to the extracted resource The scheduling information is used for resource scheduling for an access link between the RN and the user equipment UE served by the RN.

Preferably, the resource scheduling information is set by the eNB according to its current resource scheduling situation and/or expected resource scheduling situation.

Preferably, the resource scheduling information indicates that the RN can be used to access a resource block of the link.

Preferably, the resource block that the RN can use for the access link may include one of the following:

a resource block other than the resource block used by the eNB;

A resource block other than the resource block used by the eNB and some or all of the resource blocks used by the eNB.

Preferably, the resource scheduling step comprises: selecting a resource block that the RN indicated in the resource scheduling information can use for the access link, and allocating the selected resource block to the access link with the UE. Preferably, the special R-physical downlink control channel R-PDCCH in the subframe is used to carry resource scheduling information, where the special R-PDCCH is a channel for RN resource scheduling set for the downlink backhaul link. At this time, the step of extracting resource scheduling information includes: detecting a special R-PDCCH to extract resource scheduling information.

Preferably, the reserved resource in the control information area on the carrier frequency carrying the R-PDCCH in the subframe is used to carry the resource scheduling information. At this time, the step of extracting resource scheduling-information includes: when detecting the R-PDCCH, extracting resource scheduling information from reserved resources of a predetermined location in the control information region.

Preferably, the reserved resource in the data information area on the carrier frequency carrying the R-PDSCH in the subframe is used to carry the resource scheduling information. At this time, the step of extracting the resource scheduling information includes: when detecting the R-PDSCH, extracting resource scheduling information from the reserved resources of the predetermined location in the data information area.

According to another aspect of the present invention, a relay node RN is provided, including: a receiver, configured to receive a subframe including downlink backhaul link information from a base station eNB; and extracting means, configured to extract resource scheduling information from the subframe And a resource scheduling apparatus, configured to perform resource scheduling on an access link between the RN and the user equipment UE served by the RN according to the extracted resource scheduling information.

Preferably, the resource scheduling apparatus selects the resource block indicated by the RN indicated in the resource scheduling information for the access link, and allocates the selected resource block to the access link with the UE.

Preferably, the resource scheduling information is carried by using a special R-physical downlink control channel R-PDCCH in the subframe, which is a channel for RN resource scheduling set for the downlink backhaul link. At this time, the extracting device detects the special R-PDCCH to extract the resource scheduling information.

Preferably, the reserved resource in the control information area on the carrier frequency carrying the R-PDCCH in the subframe is used to carry the resource scheduling information. At this time, when detecting the R-PDCCH, the extracting means extracts the resource scheduling information from the reserved resources in the control information area.

Preferably, the reserved resource in the data information area on the carrier frequency carrying the R-PDSCH in the subframe is used to carry the resource scheduling information. At this time, when detecting the R-PDSCH, the extracting means extracts the resource scheduling information from the reserved resources in the data information area.

Preferably, the relay node RN is a 3GPP RAN1 type I relay.

According to the resource scheduling method and the corresponding relay node according to the embodiment of the present invention, the eNB can provide information about resource scheduling to each RN through a special channel or a reserved resource, and each RN can know which resources can be used for itself according to the information. The access link between the UEs is transmitted, and resources for accessing the link are scheduled accordingly. In this way, a resource scheduling indication mechanism is provided between the eNB and the RN, so that both sides The resource scheduling is no longer independent of each other, so that the overlapping and non-overlapping resources can be reasonably scheduled, the interference between resources can be avoided or minimized, the RN performance gain can be improved, and the spectrum resources can be fully utilized. DRAWINGS

The above and other objects, features and advantages of the present invention will become more apparent from

FIG. 1 shows a schematic scenario in which an embodiment of the present invention can be applied;

2 is a schematic structural diagram of a 3GPP type I relay backhaul link design scheme based on hybrid time division multiplexing and frequency division multiplexing;

FIG. 3 is a schematic structural diagram of a relay node RN according to an embodiment of the present invention;

4 illustrates a 3GPP type I relay backhaul link design scheme according to a preferred embodiment of the present invention, where a special R-PDCCH is used to carry resource scheduling information;

FIG. 5 is a flowchart showing a method for performing resource scheduling indication by using a special R-PDCCH and performing resource scheduling according to a preferred embodiment of the present invention; FIG.

6 shows a 3GPP type I relay backhaul link design scheme according to a preferred embodiment of the present invention, wherein resource scheduling information is carried by using reserved resources in the R-PDCCH;

7 shows a flow chart of a method for resource scheduling using reserved resources in an R-PDCCH in accordance with a preferred embodiment of the present invention;

8 shows a 3GPP type I relay backhaul link design scheme according to a preferred embodiment of the present invention, wherein resource scheduling information is carried by using reserved resources in the R-PDSCH;

Figure 9 is a flow chart showing a method for resource scheduling using reserved resources in the R-PDSCH in accordance with a preferred embodiment of the present invention. detailed description

In order to clearly illustrate the implementation steps of the present invention, some specific embodiments of the present invention are provided below for a wireless communication system supporting a 3GPP Type I relay backhaul link. It should be noted that embodiments of the present invention are not limited to these applications, but are applicable to more other related wireless communication systems.

The preferred embodiments of the present invention are described in detail below with reference to the accompanying drawings, and the details and functions that are not necessary for the present invention are omitted in the description to avoid confusion of the understanding of the present invention.

Before the description of the embodiment of the present invention is performed, the scenario that can be applied in the embodiment of the present invention is simplified. To explain. Referring to FIG. 1, a schematic scenario in which an embodiment of the present invention can be applied is shown, including a base station eNB 100, a relay node RN 300 under a base station eNB, and served user equipments UE1002, 3002, 3004, and the like. As indicated by the dashed arrow in the figure, there is a direct link (eNB-UE) between the eNB 100 and the user equipment UEs it serves, for example, the UEs 1002 and 3002, and there is an access between the RN and the UEs it serves, such as the UEs 3002 and 3004. Link (RN-UE:). It will be appreciated that there may also be a direct link between the eNB 100 and the UE 3004. The eNB 100 communicates with the RN 300 over a wireless link. Although only one RN and three UEs are shown in FIG. 1, it can be understood that the number of RNs and UEs is arbitrary, and the present invention is not limited to the scenario shown in FIG. The present invention provides a resource scheduling indication mechanism between the eNB and the RN for the resource interference problem that may exist between the direct link and the access link, and correspondingly improves the RN. The RN300 is taken as an example to describe the resource scheduling indication mechanism involved in the present invention.

As shown in FIG. 2, in the proposed 3GPP type I relay backhaul link design, the R-PDCCH is transmitted through a subset of OFDM symbols in a subframe containing downlink backhaul link information. For backward compatibility, in the subframe containing the downlink backhaul link information, in addition to providing the R-PDCCH and the R-PDSCH for the relay and the Rel-10 UE, the PDCCH and the PDSCH for the Rel-8 UE are also provided. . After receiving the subframe, the relay node RN detects the R-PDCCH therein. For example, the R-PDCCH related to the downlink backhaul link can be obtained by using a conventional detection technology, and the relevant carrier frequency is obtained from the R-PDCCH. The resource block allocation information of the R-PDSCH, thereby acquiring the R-PDSCH. In the presently proposed design, the resource scheduling of the eNB and the RN is performed independently of each other without considering the direct link (eNB-UE) resources allocated to the user equipment (UE) served by the eNB and allocated to the RN. There may be interference between the access link (RN-UE) resources of the served UEs. Since the transmission power of the direct link (eNB-UE) is generally larger than that of the access link (RN-UE), if the resource of the direct link (eNB-UE) and the access link (RN) The resources of the -UE are overlapped or partially overlapped, and the direct link (eNB-UE) has a negative interference to the access link (RN-UE). This is very detrimental to the performance gain of the RN. The embodiment of the present invention provides a resource scheduling method and a corresponding relay node, wherein the eNB can provide information about resource scheduling to each RN through a special channel or a reserved resource, and each RN can know which resources can be obtained according to the information. Used for access link transmission between itself and the UE, and according to this, resources for accessing the link are scheduled. In this way, a resource scheduling indication mechanism is provided between the eNB and the RN, so that resource scheduling of the two parties is no longer independent of each other, so that resources can be reasonably scheduled to avoid interference between resources. FIG. 3 shows a schematic diagram of a structure of a relay node RN according to an embodiment of the present invention. Figure. In order to clearly and briefly show the technical solution of the present invention, only the key components of the relay node in the present invention are shown in the block diagram, and other conventional components are omitted. In the following description, descriptions of conventional components are also omitted to avoid the influence of any unnecessary content.

According to an embodiment of the present invention, the relay node 300 may be a 3GPP RAN1 type I relay, including a receiver 302 for receiving a subframe containing downlink backhaul link information from the base station eNB, and an extracting device 304 for using the subframe And the resource scheduling device 306 is configured to perform resource scheduling for the access link between the RN and the user equipment UE served by the RN according to the extracted resource scheduling information. Various embodiments of the present invention will now be described in detail with reference to Figures 3-9.

As shown in FIG. 4, a 3GPP Type I relay backhaul link design scheme according to a preferred embodiment of the present invention is shown, in which a special R-PDCCH is provided to carry resource scheduling information. According to this embodiment, a special R-PDCCH is set in the subframe for carrying resource scheduling information. The setting may be performed in advance in the base station eNB. The special R-PDCCH may be set on the carrier carrying the control information in the subframe, so that the special R-PDCCH may also belong to the control information area in the subframe.

After the relay node RN300 receives the subframe containing the downlink backhaul link information from the eNB through the receiver 302, the physical format indication channel R-PCFICH on the carrier frequency carrying the R-PDCCH in the subframe is detected, and the subframe is obtained. The number of control information symbols on the carrier frequency, and in the obtained control information region on the carrier frequency of the subframe, the R-PDCCH is detected, for example, by using a conventional detection technique such as a radio network temporary identifier RNTI. If the correct R-PDCCH related to the downlink allocation and the carrier frequency indication field is not empty, the user equipment obtains the resource block allocation information of the R-PDCCH from the R-PDCCH, etc., so that the The R-PDSCH of the RN. According to an embodiment of the present invention, the RN may detect the special R-PDCCH by the extracting device 304 before or after detecting the R-PDCCH, or detect the R-PDCCH together when detecting the R-PDCCH. Here, the special R-PDCCH may adopt the same coding modulation mode as the R-PDCCH, and the detection of the special R-PDCCH may adopt the same method as the method of detecting the R-PDCCH, for example, by using the normal detection of the radio network temporary identifier RNTI. Technology, etc. Thereby, the RN 300 extracts the resource scheduling information by detecting the special R-PDCCH.

The resource scheduling information may be set by the eNB according to its current resource scheduling situation and/or expected resource scheduling conditions, and used to indicate to each RN the resource block RBs that can be used for the access link. The resource blocks that each RN can use for the access link may include resource blocks other than the resource blocks used by the eNB. Referring again to FIG. 1, the eNB 100 indicates to each RN 300 the resource blocks that have been used and/or expected to be used, Each RN 300 thus knows which resource blocks have been used. Alternatively, the resource block RB available to the RN may also include some or all of the resource blocks used by the eNB. Note that in the embodiment of the present invention, the resources for the eNB-UE direct link and the resources for the RN-UE access link are not necessarily completely overlapping. In some cases, the RN may also use the resource blocks RB, BP that the eNB has used or expected to use, and may use frequency reuse. For example, as shown in FIG. 1, for the UE 1002 located near the eNB 100 and far from the RN 300, the direct link between the eNB 100 and the UE 1002 is in good condition, and is used for transmission of the direct link between the eNB 100 and the UE 1002. The power can be smaller. Then, the resource block RB used by the eNB 100 for the UE 1002 can also be used by the RN 300 to perform access link transmission between the RN 300 and other UEs 3002 and 3004. Since the transmission power of the direct link is small compared to the transmission power of these access links, its interference to the access link is not obvious or does not seriously affect the performance gain of the RN300. In this case, the eNB 100 may inform the RN 300 through the resource scheduling information: Although these resource block RBs have been used or will be used, the RN 300 can still be used for transmission link transmission with other UEs.

The resource scheduling device 306 in the RN 300 learns which resource block RBs are available for the access link according to the extracted resource scheduling information, performs resource scheduling according to the resource allocation, and allocates the available resource block RBs to the connection between the UE and the served UE. The ingress link can avoid or reduce the interference of the used resources by the eNB-UE direct link resources, and also fully utilize the spectrum resources.

A specific flowchart for performing resource scheduling indication by using a special R-PDCCH according to the present embodiment and performing resource scheduling accordingly is shown in FIG. 5. Only the steps reflecting the main idea of the present invention in the relay node RN in the present embodiment are shown in the figure, and other conventional detecting steps and the like are omitted, thereby avoiding confusion to the understanding of the present invention.

Step 501: The RN 300 receives, by the receiver 302, a subframe including downlink backhaul link information from the base station eNB;

Step 503: The RN 300 obtains a control information area in the subframe, and detects a special R-PDCCH from the extraction device 304, and extracts resource scheduling information.

Step 505: The resource scheduling apparatus 306 performs resource scheduling for the access link between the RN and the user equipment UE served by the RN according to the extracted resource scheduling information.

As another option, there may be other options for the bearer mode of the resource scheduling information. As shown in FIG. 6, the resource scheduling information is carried in a reserved resource in a control information area on a carrier frequency carrying a R-PDCCH in a subframe. The eNB may reserve a part of resources in a control information area on a carrier frequency carrying the R-PDCCH in the subframe, and set resource scheduling information therein. The location of these resources may be predetermined or eNB and RN Prior agreed.

A specific flowchart for performing resource scheduling indication by using reserved resources in the control information area according to the embodiment and performing resource scheduling according to the present embodiment is as shown in FIG. 7. Only the steps reflecting the main idea of the present invention in the relay node RN in the present embodiment are shown in the figure to avoid confusion with the understanding of the present invention.

Step 701: The RN 300 receives, by the receiver 302, a subframe including downlink backhaul link information from the base station eNB;

Step 703: The RN300 obtains the control information area in the subframe, and when detecting the R-PDCCH, obtains the reserved resource from the predetermined position in the control information area by the extracting device 304, extracts the resource scheduling information therefrom, and then proceeds to the step. 505 ;

Step 705: The resource scheduling apparatus 306 performs resource scheduling for the access link between the RN and the user equipment UE served by the RN according to the extracted resource scheduling information.

In addition, as shown in FIG. 8, the resource scheduling information may also be carried in the reserved resources in the data information area on the carrier frequency carrying the R-PDSCH in the subframe. The eNB may reserve a part of resources in the data information area on the carrier frequency carrying the R-PDSCH in the subframe, and set resource scheduling information therein. Again, the location of these resources may be predetermined or pre-agreed by the eNB and the RN.

In this embodiment, after receiving the subframe by the receiver 302, the relay node RN300 detects the R-PDCCH therein, and obtains resource block allocation information of the R-PDSCH on the relevant carrier frequency from the R-PDCCH, thereby acquiring The data information area on the carrier frequency carrying the R-PDSCH. Upon acquiring the R-PDSCH, the RN may obtain the reserved resource from the predetermined location through the extracting means 304, and extract the resource scheduling information therefrom.

A specific flowchart for performing resource scheduling indication by using reserved resources in the data information area according to the embodiment and performing resource scheduling according to the present embodiment is as shown in FIG. 9. Only the steps reflecting the main idea of the present invention in the relay node RN in the present embodiment are shown in the figure to avoid confusion with the understanding of the present invention.

Step 901: The RN 300 receives, by the receiver 302, a subframe including downlink backhaul link information from the base station eNB.

Step 903: The RN 300 obtains a data information area in the subframe. When detecting the R-PDSCH, the extraction device 304 obtains the reserved resource from the predetermined position in the control information area, and extracts the resource scheduling information therefrom.

Step 905: The resource scheduling device 306 performs resource scheduling for the access link between the RN and the user equipment UE served by the RN according to the extracted resource scheduling information. In the above embodiment, the setting of the special R-PDCCH, the setting of the reserved resources, and other necessary settings may be performed on the base station eNB side. Although the operation of the base station is not specifically described, it will be readily apparent to those skilled in the art that the implementation of any desired arrangement is based on the full disclosure of the present invention.

In the above description, a plurality of embodiments have been enumerated for the respective steps, and although the inventors have as far as possible to indicate the instances associated with each other, this does not mean that the examples necessarily have a corresponding relationship according to the corresponding reference numerals. As long as there is no contradiction between the conditions given by the selected instance, the corresponding technical solutions may be formed in different steps by selecting examples in which the labels do not correspond, and such technical solutions are also considered to be included in the present invention. Within the scope.

Those skilled in the art will readily recognize that the different steps of the above methods can be implemented by a programmed computer. Herein, some embodiments also include a machine readable or computer readable program storage device (eg, a digital data storage medium) and encoding machine executable or computer executable program instructions, wherein the instructions perform some of the above methods or All steps. For example, the program storage device can be a digital memory, a magnetic storage medium (such as a magnetic disk and magnetic tape), a hardware or an optically readable digital data storage medium. Embodiments also include a programming computer that performs the steps of the above method.

It should be noted that in the above description, the technical solutions of the present invention have been shown by way of example only, but the invention is not limited to the above steps and unit structures. Where possible, the steps and unit structure can be adjusted and traded as needed. Therefore, certain steps and elements are not essential elements for carrying out the general inventive concept of the invention. Therefore, the technical features necessary for the present invention are limited only to the minimum requirements that can realize the general inventive concept of the present invention, and are not limited by the above specific examples.

The invention has thus far been described in connection with the preferred embodiments. It will be appreciated that various other changes, substitutions and additions may be made by those skilled in the art without departing from the spirit and scope of the invention. Therefore, the scope of the invention is not limited to the specific embodiments described above, but is defined by the appended claims.

Claims

Claim

A resource scheduling method in a relay node RN, comprising the steps of:

Receiving, from the base station eNB, a subframe including downlink backhaul link information;

Extracting resource scheduling information from the subframe;

According to the extracted resource scheduling information, resource scheduling is performed for an access link between the RN and the user equipment UE served by the RN.

2. The method according to claim 1, wherein the resource scheduling information is set by the eNB according to its current resource scheduling situation and/or expected resource scheduling situation.

3. Method according to claim 1 or 2, wherein the resource scheduling information indicates that the RN can be used to access resource blocks of the link.

4. The method according to claim 3, wherein the resource block that the RN can use for the access link can include one of the following:

a resource block other than the resource block used by the eNB;

The method according to claim 3, wherein the resource scheduling step comprises: selecting a resource block that the RN indicated in the resource scheduling information can be used for the access link, and assigning the selected resource block to the connection with the UE Into the link.

The method according to claim 1, wherein the resource scheduling information is carried by using a special R-physical downlink control channel R-PDCCH in a subframe, where the special R-PDCCH is set for the downlink backhaul link for the RN The channel for resource scheduling.

7. The method according to claim 6, wherein the step of extracting resource scheduling information comprises: detecting a special R-PDCCH to extract resource scheduling information.

8. The method according to claim 1, wherein the resource scheduling information is carried by using reserved resources in a control information area on a carrier frequency carrying a R-PDCCH in a subframe.

9. The method according to claim 8, wherein the step of extracting resource scheduling information comprises: extracting resource scheduling information from reserved resources of a predetermined location in a control information region when detecting the R-PDCCH.

10. The method according to claim 1, wherein a carrier frequency carrying R-PDSCH in a subframe is used The reserved resources in the upper data information area are used to carry resource scheduling information.

The method according to claim 10, wherein the extracting the resource scheduling information comprises: extracting resource scheduling information from the reserved resources of the predetermined location in the data information area when detecting the R-PDSCH.

12. A relay node RN, comprising:

a receiver, configured to receive, from a base station eNB, a subframe that includes downlink backhaul link information;

An extracting device, configured to extract resource scheduling information from a subframe;

The resource scheduling apparatus is configured to perform resource scheduling on an access link between the RN and the user equipment UE served by the RN according to the extracted resource scheduling information.

The relay node according to claim 12, wherein the resource scheduling apparatus selects a resource block indicated by the RN indicated in the resource scheduling information, and allocates the selected resource block to the UE. Into the link.

14. The relay node according to claim 12, wherein resource scheduling information is carried using a special R-physical downlink control channel R-PDCCH in a subframe, the special R-PDCCH being configured for a downlink backhaul link Channel for RN resource scheduling.

15. The relay node according to claim 14, wherein the extracting means detects the special R-PDCCH to extract the resource scheduling information.

16. The relay node according to claim 12, wherein the resource scheduling information is carried by using reserved resources in a control information area on a carrier frequency carrying a R-PDCCH in a subframe.

17. The relay node according to claim 16, wherein, when detecting the R-PDCCH, the extracting means extracts resource scheduling information from the reserved resources in the control information area.

18. The relay node according to claim 12, wherein the resource scheduling information is carried by using reserved resources in the data information area on the carrier frequency carrying the R-PDSCH in the subframe.

The relay node according to claim 12, wherein, when detecting the R-PDSCH, the extracting means extracts resource scheduling information from the reserved resources in the data information area.

20. The relay node according to claim 12, wherein the relay node RN is a 3GPP RAN1 Type I relay.