WO2010133106A1 - 回程链路上行资源配置指示及数据传输的方法及系统 - Google Patents

回程链路上行资源配置指示及数据传输的方法及系统 Download PDF

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Publication number
WO2010133106A1
WO2010133106A1 PCT/CN2010/071421 CN2010071421W WO2010133106A1 WO 2010133106 A1 WO2010133106 A1 WO 2010133106A1 CN 2010071421 W CN2010071421 W CN 2010071421W WO 2010133106 A1 WO2010133106 A1 WO 2010133106A1
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WIPO (PCT)
Prior art keywords
subframe
uplink
indication information
backhaul link
uplink resource
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PCT/CN2010/071421
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English (en)
French (fr)
Inventor
杨瑾
毕峰
梁枫
袁明
吴栓栓
Original Assignee
中兴通讯股份有限公司
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Publication of WO2010133106A1 publication Critical patent/WO2010133106A1/zh

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Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W56/00Synchronisation arrangements
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W72/00Local resource management
    • H04W72/04Wireless resource allocation
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W84/00Network topologies
    • H04W84/02Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
    • H04W84/04Large scale networks; Deep hierarchical networks
    • H04W84/042Public Land Mobile systems, e.g. cellular systems
    • H04W84/047Public Land Mobile systems, e.g. cellular systems using dedicated repeater stations

Definitions

  • the present invention belongs to the field of mobile communications, and in particular, to a method and system for uplink resource configuration indication and data transmission for a backhaul link of a Time Division Duplexing (TDD) system.
  • TDD Time Division Duplexing
  • Relay technology as a key technology of B3G/4G, has played an important role in the research of Long Term Evolution (LTE) standards.
  • LTE Long Term Evolution
  • the introduction of a relay node (RN) in the system can improve network coverage and improve user throughput.
  • the RN changes the original network structure and the original enhanced base station in the LTE network.
  • the single-hop link between the enhanced Node B (eNB) and the user equipment (User Equipment, UE) is divided into two hop links, forming a backhaul link between the eNB and the RN (Backhaul Link) and access between the RN and the UE.
  • Link Access Link
  • the configuration and control of the eNB by the eNB may be performed according to the method between the eNB and the UE.
  • some configurations or control methods cannot directly implement the existing method between the eNB and the UE.
  • the uplink resource allocation method of the eNB for the UE uses a fixed Timing Table, that is, the downlink subframe carrying the uplink resource grant information (UL Grant) and the uplink subframe where the allocated uplink resource is located.
  • UL Grant uplink resource grant information
  • a fixed timing relationship is established between the frames, and the eNB sends a UL Grant to the UE in the n subframe, instructing the UE to perform uplink transmission with the allocated resources in the n+k subframe.
  • the definition rules of k are as shown in Table 1.
  • subframe configurations for the 10ms radio frame in the TDD system which are configuration 0-6, and the number and location of the uplink and downlink subframes and special subframes in each radio frame in different configurations.
  • the configuration is different.
  • the k value has a corresponding setting.
  • Table 1 “D” represents a downlink subframe
  • "U” represents an uplink subframe
  • "S” represents a special subframe.
  • the value of the #1 subframe of configuration 0 corresponds to a value of 6
  • the uplink resource allocated by the UL Grant for the 7-bit subframe is corresponding to the #7 subframe, and the UE receives the UL.
  • the uplink transmission is performed to the eNB in the #7 subframe according to the allocated uplink resource.
  • the MME indicates that the uplink resource configuration of the UE uses a Timing Table with a fixed timing relationship, and the UL Grant information includes a configuration indication for the specific physical resource, and does not include an indication of the subframe in which the configured resource is located.
  • the eNB may have a higher flexibility requirement for the uplink resource configuration of the corresponding Backhaul Link of the RN, and the fixed preset timing relationship constraint cannot be performed. Therefore, the indication of the Backhaul Link uplink resource configuration is in addition to the information indication included in the existing UL Grant. It may also be necessary to have a specific indication of the subframe in which the allocated resource is located.
  • the eNB cannot completely use the Timing Table that is configured to indicate the UE.
  • the RN performs relaying of data between the eNB and the UE, the RN cannot receive and transmit signals in the same frequency band at the same time, so the RN cannot perform the uplink signal to the eNB while receiving the uplink signal from the UE.
  • the RN cannot receive the uplink signal of the UE.
  • the same requirements apply to the downlink resources of the Backhaul Link.
  • the Backhaul Link and the Access Link need to be divided in a time division manner.
  • the time-division of the RN in the Backhaul Link and the Access Link causes the following problems in the TDD system:
  • the system carries the downlink of the UL Grant information when the Backhaul Link is configured with the downlink and the downlink resources according to the network planning and the cell service load.
  • the k-value timing relationship specified in Table 1 cannot be guaranteed between the frame and the subframe in which the configured uplink Backhaul resource is located. That is, when the eNB needs to configure the RN to perform Backhaul Link uplink transmission in the m subframe, the corresponding mk subframe does not necessarily have the Backhaul Link downlink resource, and cannot be carried according to the timing relationship described in Table 1 according to the manner in which the eNB indicates the UE.
  • the UL Grant information sent by the eNB to the RN can only be configured with the corresponding n+k subframe for Backhaul Link uplink transmission according to the timing relationship described in Table 1, which will largely limit the The flexibility of uplink Backhaul Link resource configuration. Summary of the invention
  • one of the objectives of the present invention is to provide a backhaul link uplink resource configuration indication and a data transmission method, which are used to solve the technical problem that the relay station uplink resource configuration is not applicable to the base station and the terminal, and the configuration flexibility is poor.
  • the above object is achieved by the technical solution of the present invention:
  • a method for uplink resource configuration indication and data transmission of a backhaul link includes:
  • the evolved base station (eNB) indicates, to the relay station (RN), the location of the uplink subframe in which the allocated uplink resource is located, according to the backhaul link timing table or the additional indication information in the uplink resource grant information based on the backhaul link timing table.
  • the RN performs uplink transmission in the allocated uplink subframe according to the backhaul link timing table, or the backhaul link timing table and the additional indication information.
  • the backhaul link timing table includes a subframe between a downlink subframe that carries backhaul link uplink resource grant information and an uplink subframe where the allocated backhaul uplink resource is located.
  • the interval k, k is a positive integer.
  • the downlink subframe carrying the backhaul link uplink resource grant information is any downlink sub-frame other than the #0, #1, #5, and #6 subframes.
  • the frame n, the k value respectively set for the downlink subframe n in the configuration 0-6 of the time division duplex system constitutes the backhaul link timing table, where the subframe n+k is an uplink subframe.
  • the k value is not set
  • the k value corresponding to the #4, #9 subframe is set to 4;
  • the k value of #3, #8 subframe position is set to 4;
  • the k value of #8, #9 subframe position is set to 4;
  • the k value of the #9 subframe position is set to 4;
  • the k value of the #9 subframe position is set to 5.
  • the eNB sends uplink resource grant information to the backhaul link to the RN in the n subframe, and the RN performs uplink transmission to the eNB in the subframe n+k according to the backhaul link timing table.
  • the eNB indicates, according to the backhaul link timing table, the location of the uplink subframe in which the allocated uplink resource is located, and the additional indication information is the specific subframe indication information, by using the additional indication information in the uplink resource grant information. Determining, according to the specific subframe indication information, a subframe position where the allocated uplink resource is located;
  • the RN When a specific subframe is not indicated in the specific subframe indication information, the RN performs uplink transmission according to the resource allocated by the uplink resource grant information on the subframe n+k according to the backhaul link timing table; When the specific subframe c is indicated in the subframe indication information, the RN performs uplink transmission on the indicated subframe c according to the resource allocated by the uplink resource grant information.
  • the specific subframe c indicated in the specific subframe indication information is an uplink subframe after the subframe carrying the uplink resource grant information in the current radio frame or an uplink subframe in a radio frame after the current radio frame.
  • the eNB indicates, according to the backhaul link timing table, the location of the uplink subframe where the allocated uplink resource is located, and the additional indication information is the subframe offset indication information, by using the additional indication information in the uplink resource grant information. Determining, according to the subframe offset indication information, a subframe position where the allocated uplink resource is located;
  • the RN When the subframe offset indication information indicates that the offset adjustment is not performed, the RN performs uplink transmission according to the resource allocated by the uplink resource grant information on the subframe n+k according to the backhaul link timing table; when the subframe offset indication When the information indicates that the offset adjustment is to be performed, the RN performs a subframe offset on the basis of the subframe n+k according to the backhaul link timing table, if the subframe offset indicated by the subframe offset indication information is s, the RN performs uplink transmission according to the resource allocated by the uplink resource grant information in the subframe n+k+s; where s is an integer, and the subframe n+k+s is an uplink subframe.
  • the eNB indicates, according to the backhaul link timing table, the location of the uplink subframe in which the allocated uplink resource is located, and the additional indication information is an uplink subframe offset indication, by using the additional indication information in the uplink resource grant information.
  • the RN determines, according to the uplink subframe offset indication information, a subframe position where the allocated uplink resource is located;
  • the RN When the uplink subframe offset indication information indicates that the offset adjustment is not performed, the RN performs uplink transmission according to the resource allocated by the uplink resource grant information on the subframe n+k according to the backhaul link timing table; When the shift indication information indicates that the offset adjustment is to be performed, the RN performs an uplink subframe offset on the basis of the subframe n+k according to the backhaul link timing table, if the uplink subframe offset indication information indicates the subframe.
  • the offset is t, and the RN performs uplink transmission according to the resource allocated by the uplink resource grant information on the tth uplink subframe after the subframe n+k; where t is an integer.
  • the present invention also provides a corresponding backhaul link uplink resource configuration indication and data transmission system, the system includes an eNB and an RN;
  • the eNB side includes: a configuration module and a delivery module;
  • a configuration module configured to configure a backhaul link uplink resource of the relay station RN according to the backhaul link timing table, or add the indication information and the backhaul link of the relay station RN based on the backhaul link timing table
  • the uplink resource is configured, where the additional indication information is used to adjust, according to the backhaul link timing table, the location of the uplink subframe where the uplink resource of the backhaul link is located;
  • the sending module is configured to send uplink resource authorization information to the relay station in the specified subframe according to the configuration of the configuration module;
  • the relay station RN side includes: an uplink subframe position determining module and an uplink transmission module; wherein, the uplink subframe position determining module is configured to determine a backhaul according to the backhaul link timing table or the backhaul link timing table in combination with the additional indication information The location of the uplink subframe where the uplink resource of the link is located;
  • the uplink transmission module is configured to perform uplink transmission according to the resource allocated by the uplink resource grant information sent by the sending module, in an uplink subframe where the uplink resource of the backhaul link determined by the uplink subframe location determining module is located.
  • the configuration module includes:
  • An uplink resource configuration module configured to configure, according to a backhaul link timing table, a backhaul link uplink resource of the relay station RN;
  • Additional indication information configuration module for configuring additional indication information
  • the additional indication information configuration module refers to a specific subframe indication information configuration module, or a subframe offset indication information configuration module, or an uplink subframe offset indication information configuration module:
  • the specific subframe indication information configuration module is configured to: configure the specific subframe indication information to be additional indication information; the specific subframe indication information is used to indicate that the subframe where the backhaul link uplink resource is located is a sub-frame indicated by the specific subframe indication information. frame;
  • the subframe offset indication information configuration module is configured to: configure the subframe offset indication information to be additional indication information; the subframe offset indication information is used to indicate that the subframe of the backhaul link uplink resource is relative to the backhaul link timing table. The subframe offset between the determined subframes;
  • the uplink subframe offset indication information configuration module is configured to: configure the uplink subframe offset indication information to be additional indication information; and the uplink subframe offset indication information is used to indicate the backhaul link uplink resource
  • the uplink subframe offset between the subframe and the subframe determined according to the backhaul link timing table; the uplink subframe location determining module includes:
  • a base location determining module configured to determine, according to the backhaul link timing table, a subframe position where the uplink resource of the backhaul link is located;
  • an adjustment module configured to adjust, according to the additional indication information, a subframe position determined by the basic location determining module, to determine a subframe position where the uplink resource of the backhaul link is located, where the additional indication information is a specific subframe indication information, or a subframe offset The indication information, or the uplink subframe offset indication information.
  • a method for uplink resource configuration indication and data transmission of a backhaul link includes:
  • the eNB does not have a fixed timing relationship between the downlink subframe in which the uplink resource grant information of the backhaul link is sent to the RN and the uplink subframe in which the allocated uplink resource is located.
  • the eNB does not include the uplink resource grant information sent by the subframe n.
  • the configuration indication of the physical resource further includes the subframe position indication information of the uplink subframe in which the uplink resource allocated by the RN is located, and the RN is authorized according to the uplink resource in the indicated uplink subframe according to the subframe position indication information.
  • the resources allocated by the information are transmitted in the uplink.
  • the subframe location indication information included in the uplink resource grant information of the eNB is the specific subframe indication information, and the RN allocates the resource according to the uplink resource grant information in the uplink subframe indicated by the specific subframe indication information. Perform uplink transmission;
  • the specific subframe indicated by the specific subframe indication information is an uplink subframe in the current radio frame or an uplink subframe in a radio frame after the current radio frame.
  • the subframe position indication information included in the uplink resource grant information of the backhaul link is the subframe offset indication information, and the subframe offset indication information is in the downlink subframe where the uplink resource grant information is located.
  • the subframe offset k indicates the location of the uplink subframe in which the allocated uplink resource is located, and after receiving the uplink resource grant information in the subframe n, the RN performs uplink on the subframe n+k.
  • the resource allocated by the resource authorization information is used for uplink transmission.
  • the subframe offset k is a positive integer
  • the subframe n+k is an uplink subframe.
  • the subframe position indication information included in the uplink resource grant information of the backhaul link is the uplink subframe offset indication information, and the uplink subframe offset indication information is in the downlink with respect to the uplink resource grant information.
  • the uplink subframe offset L of the subframe indicates the uplink subframe position where the allocated uplink resource is located, and after receiving the uplink resource grant information in the subframe n, the RN is based on the Lth uplink subframe after the subframe n.
  • the uplink resource transmission is performed by using the resource allocated by the uplink resource grant information.
  • the uplink subframe offset L is a positive integer.
  • the present invention also provides a corresponding backhaul link uplink resource configuration indication and data transmission system, the system includes an eNB and an RN;
  • the eNB side includes: a configuration module and a delivery module; wherein
  • the configuration module is configured to: configure the uplink resource authorization information that is sent to the relay station; the uplink resource authorization information includes the configuration instruction of the uplink resource of the backhaul link, and the middle-issuing module is further configured to: The configuration of transmitting the uplink resource grant information on the designated uplink subframe to the relay station;
  • the RN side includes: an uplink subframe position determining module and an uplink transmission module; wherein, an uplink subframe position determining module is configured to: according to the subframe bit uplink transmission module included in the uplink resource grant information: used in the uplink sub Uplinking is performed on the uplink subframe determined by the frame location determining module according to the resource allocated by the uplink resource grant information.
  • the subframe position indication information of the subframe in which the uplink resource allocated by the relay station is configured in the uplink resource authorization information is: specific subframe indication information, or subframe offset indication information, or Uplink subframe offset indication information;
  • the specific subframe indication information is used to indicate that the subframe where the uplink resource of the backhaul link is located is the specific The subframe indicates the subframe indicated by the information;
  • the subframe offset indication information is used to indicate a subframe offset of a subframe where the uplink resource of the backhaul link is located with respect to the subframe where the uplink resource grant information is located;
  • the uplink subframe offset indication information is used to indicate an uplink subframe offset of a subframe where the uplink resource of the backhaul link is located with respect to the subframe where the uplink resource grant information is located;
  • the uplink subframe position determining module according to the subframe included in the uplink resource grant information, where the subframe position indication information is: specific subframe indication information, or subframe offset indication information, or uplink subframe offset indication information .
  • the present invention provides some methods for indicating the uplink resource configuration of the Backhaul Link of the TDD system.
  • the present invention establishes a backhaul link timing table between the eNB and the RN, and can also cooperate with the uplink resource authorization on the basis of the backhaul link timing table.
  • the additional indication information in the information includes a specific subframe, or a subframe offset, or an uplink subframe offset indication information; or directly includes the subframe position indication information, including a specific subframe, or a subframe, in the uplink resource grant information.
  • the subframe position indication information is used to determine the subframe position where the uplink resource of the backhaul link is located.
  • the present invention can effectively indicate the configuration of the Backhaul Link uplink resource, improve the flexibility of the Backhaul Link uplink resource configuration, adapt to the system requirements, and improve resource utilization.
  • 1 is a schematic diagram of a structure of a relay network
  • FIG. 2 is a schematic diagram of determining an uplink subframe position according to Embodiment 1 of the present invention
  • FIG. 3 is a schematic diagram of determining an uplink subframe position according to Embodiment 1 of the present invention.
  • FIG. 4 is a schematic diagram of determining an uplink subframe position according to Embodiment 2 of the present invention.
  • FIG. 5 is a schematic diagram of determining an uplink subframe position according to Embodiment 3 of the present invention
  • FIG. 6 is a schematic diagram of determining an uplink subframe position according to Embodiment 4 of the present invention
  • FIG. 7 is a schematic diagram of determining an uplink subframe position according to Embodiment 5 of the present invention
  • FIG. 8 is a schematic diagram of determining an uplink subframe position according to Embodiment 6 of the present invention.
  • FIG. 9 is a schematic diagram of determining an uplink subframe position according to Embodiment 7 of the present invention.
  • FIG. 10 is a schematic structural diagram of an uplink resource configuration indication and a data transmission system of a backhaul link according to the present invention. detailed description
  • the eNB is configured to use the Timing Table-based method, and the eNB indicates the Backhaul Link uplink resource allocated to the RN, and establishes a fixed between the downlink subframe carrying the UL Grant information and the uplink subframe where the allocated Backhaul Link uplink resource is located.
  • the second method does not need to pre-define a fixed timing relationship between the downlink subframe in which the eNB sends the UL Grant information to the RN and the uplink subframe in which the allocated uplink resource is located, and the RN completely depends on the eNB in the UL Grant information.
  • the subframe position indication information is obtained by obtaining uplink subframe position information of the allocated uplink resource.
  • Embodiments 1 to 4 are implemented based on the first method, and Embodiments 5 to 7 are implemented based on the second method.
  • a specific Timing Table can be established between the eNB and the RN, and a fixed timing between the downlink subframe carrying the UL Grant on the Backhaul Link and the subframe in which the allocated uplink resource is located is set. relationship.
  • Table 2 shows an example of a given Timing Table between an eNB and an RN, where D indicates that the corresponding subframe is a downlink subframe, U indicates that the corresponding subframe is an uplink subframe, and S indicates a special subframe, for Configuration 0- 6
  • the value k given in the corresponding sub-frame (Subframe #0-#9) (k is positive The integer) represents the uplink transmission on the kth subframe after the current subframe (that is, the subframe carrying the UL Grant information).
  • the RN performs uplink transmission according to the uplink resource grant information on the n+k subframe.
  • the downlink subframe carrying the uplink resource grant information of the backhaul link is any downlink subframe n except the #0, #1, #5, and #6 subframes.
  • Set k 4 for the #8 subframe, that is, in the #8 subframe eNB
  • the RN delivers the UL Grant
  • the RN performs uplink transmission according to the allocated resources on the #2 subframe of the next radio frame.
  • the allocated resources are transmitted upstream. If the UL grant is sent to the RN in the #9 subframe, the RN performs uplink transmission according to the allocated resources on the #3 subframe of the next radio frame.
  • the allocated resources are transmitted upstream.
  • the allocated resources are transmitted upstream.
  • the eNB can carry the UL Grant to the RN in the downlink Backhaul Link resource of the #3 subframe.
  • the RN After receiving the UL Grant information in the #3 subframe, the RN obtains the uplink resource allocated by the UL Grant in the #7 subframe according to the timing relationship shown in Table 2, and carries the data to be transmitted in the corresponding #7 subframe. Uplink transmission is performed to the eNB on the uplink resource.
  • the eNB can configure the RN to perform Backhaul Link uplink transmission on the two subframes in a radio frame.
  • the eNB carries the pair RN in the downlink Backhaul Link resources of the #4 and #9 subframes respectively.
  • UL Grant After receiving the UL Grant information in the #4 subframe, the RN obtains the uplink resource allocated by the UL Grant according to Table 2 on the #8 subframe, and after receiving the UL Grant information in the #9 subframe, Uplink resource configuration of #3 subframe of a radio frame. The corresponding data is carried in the #8 subframe and the #3 subframe of the next radio frame is uplinked to the eNB.
  • the system can make certain configurations do not support Relay as needed. As shown in Table 2, Configuration 0 and 5 do not set the value of k. When the system configuration uses Configuration 0 or 5, the system does not support Relay work.
  • the eNB may set additional indication information in the Backhaul Link uplink resource grant information to indicate to the RN the location of the uplink subframe in which the allocated uplink resource is located.
  • Embodiment 2 Additional indication information is a specific subframe indication information
  • the method is based on the basic Timing Table method of the first embodiment, and the method determines the subframe in which the uplink resource is located according to the Timing Table between the eNB and the RN and the specific subframe indication information included in the uplink resource grant information sent by the eNB to the RN. position.
  • the RN performs uplink transmission according to the allocated resource on the n+k subframe according to the predefined timing relationship of the Timing Table; if the specific subframe indication information includes the subframe location c, the RN performs uplink transmission according to the allocated uplink resource on the c subframe according to the indication of the specific subframe indication information.
  • the eNB is in #8 subframe orientation.
  • the RN sends UL Grant information and specific subframe indication information.
  • the RN indicates the next radio frame #3 subframe according to the predefined Timing Table in the #2 information c of the next radio frame
  • the RN follows the indication.
  • the #3 subframe in the next radio frame is uplinked according to the allocated uplink resource.
  • Embodiment 3 Additional indication information is subframe offset indication information
  • the method is based on the basic Timing Table method of the first embodiment, where the method determines the sub-resource in the subframe according to the Timing Table between the eNB and the RN and the subframe offset indication information included in the uplink resource grant information sent by the eNB to the RN. Frame position.
  • the RN If the subframe offset indication information indicates that the subframe offset is not required, the RN according to Timing The Table pre-defined timing relationship is uplinked according to the allocated resources on the n+k subframe; if the subframe offset indication information indicates that the subframe offset needs to be performed, the RN determines the sub-sub-table according to the offset indication information. The subframe offset is performed on the basis of the frame position, and uplink transmission is performed.
  • the k value corresponding to the #9 subframe is 5, and based on the basic Timing Table method, the subframe in which the uplink resource is located is the #4 subframe of the next radio frame.
  • the eNB sends the UL Grant information and the subframe offset indication information to the RN in the #9 subframe.
  • the Backhaul Link uplink transmission is performed on the #4 subframe of the next radio frame according to the allocated uplink resource.
  • the subframe offset indication information indicates that the offset needs to be performed
  • Embodiment 4 Additional indication information is an uplink subframe offset indication information
  • the method is based on the basic Timing Table method of the first embodiment, where the method determines the uplink resource according to the Timing Table between the eNB and the RN and the uplink subframe offset indication information included in the uplink resource grant information sent by the eNB to the RN. Subframe position.
  • the RN obtains the subframe position where the allocated uplink resource is located. If the uplink subframe offset indication information indicates that the subframe offset is not required, the RN performs uplink transmission according to the allocated resources on the n+k subframe according to the predefined timing relationship of the Timing Table; if the uplink subframe offset indication The information indicates that the subframe offset needs to be performed, and the RN performs uplink transmission on the tth uplink subframe after the n+k subframe set by the Timing Table according to the uplink subframe offset indication information.
  • the eNB transmits UL Grant information and uplink subframe offset indication information to the RN in the #9 subframe.
  • the RN is based on the predefined Timing Table.
  • the Backhaul Link uplink transmission is performed on the #4 subframe of the next radio frame according to the allocated uplink resource.
  • the second method RN obtains uplink subframe position information of the allocated uplink resource according to the subframe position indication information of the eNB in the UL Grant information.
  • Embodiment 5 Subframe position indication information is a specific subframe indication information
  • the UL Grant information includes, in addition to the configuration indication of the physical resource, the subframe position indication information of the uplink subframe in which the uplink resource allocated by the RN is located, the sub-frame The frame position indication information is indicated by a specific subframe number, and indicates that the RN performs Backhaul Link uplink transmission according to the uplink resource indicated by the UL Grant information configuration in the specified specific subframe.
  • the eNB indicates the UL Grant information of the Backhaul Link and the specific subframe c of the RN. After receiving the information, the RN performs uplink transmission to the eNB according to the allocated uplink resource according to the indication according to the indication.
  • the RN receives the information indication if the eNB indicates the UL grant information of the RN to the Backhaul Link in the #4 subframe and indicates that the uplink transmission is performed in the #8 subframe of the current radio frame. Then, the uplink transmission data bearer is transmitted to the eNB on the uplink resource allocated by the #8 subframe. Similarly, the eNB may also indicate the UL grant information of the RN to the Backhaul Link in the #4 subframe and indicate that the uplink transmission is performed in the #2 subframe of the next radio frame, and the RN carries the uplink transmission data in the next radio frame #2. The uplink resources allocated by the subframe are transmitted to the eNB.
  • Embodiment 6 Subframe position indication information is subframe offset indication information
  • the n subframe performs Backhaul Link uplink transmission on the n+k subframe according to the allocated uplink resource, where k is a positive integer, and the n+k subframe is an uplink subframe.
  • the eNB indicates the UL Grant and the corresponding subframe offset to the RN in the #8 subframe
  • the RN is in the next wireless.
  • Subframe position indication information is an uplink subframe offset indication information
  • the UL Grant information includes an indication of the configuration of the physical resource, and includes information indicating the subframe in which the uplink resource is configured by the RN.
  • the information about the subframe in which the uplink subframe is located is indicated by the uplink subframe offset L, indicating that the RN receives the UL Grant information in the n subframe, and follows the allocated uplink in the subsequent L uplink subframe.
  • L is a positive integer.
  • the eNB side includes a configuration module and a delivery module
  • the relay station side includes an uplink subframe position determining module and an uplink transmission module.
  • the configuration module is configured to configure, according to the backhaul link timing table, the uplink resource of the backhaul link of the relay station RN, or further, the bit of the uplink subframe where the uplink resource of the backhaul link is located
  • the configuration is performed, for example, the configuration of the additional indication information or the configuration of the subframe position indication information is added to the uplink resource authorization information.
  • the sending module is configured to send the uplink resource authorization information to the relay station in the specified subframe according to the configuration of the configuration module.
  • the uplink subframe position determining module is configured to determine an uplink subframe in which the uplink resource of the backhaul link is located; and the uplink transmission module is configured to use the uplink resource authorization sent by the sending module on the uplink subframe determined by the uplink subframe location determining module.
  • the resources allocated by the information are transmitted in the uplink.

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Description

回程链路上行资源配置指示及数据传输的方法及系统 技术领域
本发明属于移动通信领域, 尤其涉及用于时分双工 (Time Division Duplexing, TDD ) 系统回程链路的上行资源配置指示及数据传输的方法及 系统。 背景技术
中继( Relay )技术作为 B3G/4G的关键技术, 己在长期演进( Long Term Evolution, LTE )标准的研究中占有重要地位。 如图 1所示, 在系统中引入 中继站(Relay Node, RN )可以起到完善网络覆盖、 提高用户吞吐量的作 用, 但同时 RN 改变了原有的网络结构, 将 LTE 网络中原有的增强基站 ( enhanced Node B, eNB )与用户(User Equipment, UE)之间的单跳链路分 成两跳链路, 形成 eNB与 RN之间的回程链路 ( Backhaul Link )和 RN与 UE间的接入链路( Access Link )。
eNB对 RN的配置及控制可以依照于 eNB与 UE之间方法进行, 但由 于 Backhaul Link具有一定特殊性, 一些配置或控制方法不能直接釆用 eNB 与 UE之间己有的方法实现。
在 LTE TDD系统中, eNB对 UE的上行资源配置方法釆用了固定的时 序表( Timing Table ) 方式, 即承载上行资源授权信息 (UL Grant ) 的下行 子帧与所分配的上行资源所在上行子帧之间建立固定的时序关系, eNB在 n 子帧向 UE下发 UL Grant,指示 UE在 n+k子帧用所分配的资源进行上行传 输, k的定义规则如表 1所示。
其中, TDD系统中对 10ms无线帧有 7种不同的子帧配置, 分别为配 置 0-6, 不同配置下每个无线帧中的上、 下行子帧及特殊子帧的数量及位置 配置不同。 针对不同配置, k值有相应的设置。 如表 1所示, "D"表示下行 子帧, "U"表示上行子帧, "S"表示特殊子帧。 如配置 0 ( Configuration 0 ) 的# 1子帧对应的 k值为 6 , 即表示在# 1子帧上 7 载的 UL Grant所分配 的上行资源对应在 # 7子帧上, UE收到此 UL Grant信息后按照所分配的上 行资源在# 7子帧向 eNB进行上行传输。
k for TDD configurations 0-6
Figure imgf000004_0001
由于 eNB对 UE 的上行资源配置指示釆用了固定时序关系的 Timing Table, 在 UL Grant信息中包含对具体物理资源的配置指示, 而不包括对所 配置资源所在子帧的指示。而 eNB对 RN相应 Backhaul Link的上行资源配 置可能有较高的灵活性要求而无法进行固定的预设时序关系约束, 因此对 Backhaul Link上行资源配置的指示除了现有 UL Grant中包含的信息指示 外, 可能还需要具有对所分配资源所在子帧的具体指示。
另夕卜, 对于 Backhaul Link上行资源配置的指示即使釆用 Timing Table 的方式, eNB也不能完全釆用与配置指示 UE—样的 Timing Table。 RN在 eNB和 UE之间进行数据的中继转发时, RN不能同时在同一频段内接收和 发射信号, 因此在接收来自 UE的上行信号的同时 RN不能向 eNB进行上 行数据的传输, 同样的, 在向 eNB进行上行数据传输时, RN也无法接收 UE的上行信号。 对 Backhaul Link的下行资源也存在同样的要求, 对于 RN 来说, Backhaul Link和 Access Link需要以时分方式进行划分。
RN在 Backhaul Link和 Access Link的时分性, 在 TDD系统中则带来 以下问题: 系统根据网络规划, 小区业务负载等因素对 RN配置 Backhaul Link上、 下行资源时, 承载着 UL Grant信息的下行子帧与所配置的上行 Backhaul资源所在子帧之间不能够保证满足表 1中所规定的 k值时序关系。 也就是说, 当 eNB需要为 RN配置在 m子帧进行 Backhaul Link上行传输 时, 相应的 m-k子帧不一定有 Backhaul Link下行资源, 无法按 eNB指示 UE的方式按照表 1所述时序关系承载给 RN的 UL Grant信息。 同样的,在 Backhaul Link下行传输中 eNB发送给 RN的 UL Grant信息, 如果按照表 1 所述时序关系也只能配置相应 n+k子帧进行 Backhaul Link上行传输, 这将 很大程度上限制对上行 Backhaul Link资源配置的灵活性。 发明内容
有鉴于此, 本发明的目的之一在于提供回程链路上行资源配置指示及 数据传输的方法, 用于解决中继站上行资源配置不适用基站与终端的时序 表, 配置灵活性差的技术缺陷, 为达到上述目的, 本发明的技术方案是这 样实现的:
一种回程链路上行资源配置指示及数据传输的方法, 包括:
演进型基站(eNB )根据回程链路时序表, 或在回程链路时序表的基础 上结合上行资源授权信息中的附加指示信息向中继站(RN )指示所分配的 上行资源所在上行子帧的位置; RN根据回程链路时序表、 或回程链路时序 表及附加指示信息, 在所分配的上行子帧进行上行传输。
进一步地, 所述回程链路时序表中包括有承载回程链路上行资源授权 信息的下行子帧与所分配的回程链路上行资源所在的上行子帧之间的子帧 间隔 k, k为正整数; 时分双工 TDD系统中, 所述承载回程链路上行资源 授权信息的下行子帧为除 #0、 #1、 #5和 #6子帧之外的任意下行子帧 n, 对 时分双工系统的配置 0-6 中的所述下行子帧 n分别设置的 k值构成所述回 程链路时序表, 其中子帧 n+k为上行子帧。
进一步地, 所述回程链路时序表中不同配置下的所述子帧间隔 k的设 置具体为:
针对配置 0和配置 5 , 不设置所述 k值;
针对配置 1 , #4、 #9子帧对应的 k值设置为 4;
针对配置 2, #3、 #8子帧位置的 k值设置为 4;
针对配置 3 , #8、 #9子帧位置的 k值设置为 4;
针对配置 4, #9子帧位置的 k值设置为 4;
针对配置 6, #9子帧位置的 k值设置为 5。
进一步地, eNB在 n子帧向 RN下发对回程链路的上行资源授权信息, RN根据所述回程链路时序表在子帧 n+k上向 eNB进行上行传输。
进一步地, eNB 在回程链路时序表的基础上结合上行资源授权信息中 的附加指示信息向 RN指示所分配的上行资源所在上行子帧的位置,所述附 加指示信息为特定子帧指示信息, RN根据所述特定子帧指示信息确定所分 配上行资源所在子帧位置;
当所述特定子帧指示信息中未指示某具体子帧时, RN根据所述回程链 路时序表在子帧 n+k上根据上行资源授权信息所分配的资源进行上行传输; 当所述特定子帧指示信息中指示特定子帧 c时, RN在所指示的子帧 c 上根据上行资源授权信息所分配的资源进行上行传输;
所述特定子帧指示信息中指示的特定子帧 c 为当前无线帧中承载上行 资源授权信息的子帧之后的某一上行子帧或当前无线帧之后某无线帧中的 某一上行子帧。 进一步地, eNB 在回程链路时序表的基础上结合上行资源授权信息中 的附加指示信息向 RN指示所分配的上行资源所在上行子帧的位置,所述附 加指示信息为子帧偏移指示信息, RN根据所述子帧偏移指示信息确定所分 配上行资源所在子帧位置;
当子帧偏移指示信息指示不进行偏移调整时, RN根据所述回程链路时 序表在子帧 n+k上根据上行资源授权信息所分配的资源进行上行传输; 当子帧偏移指示信息指示要进行偏移调整时, RN根据所述回程链路时 序表在子帧 n+k的基础上进行子帧偏移, 若所述子帧偏移指示信息指示的 子帧偏移量为 s, 则 RN在子帧 n+k+s上根据上行资源授权信息所分配的资 源进行上行传输; 其中, s为整数, 且子帧 n+k+s为上行子帧。
进一步地, eNB 在回程链路时序表的基础上结合上行资源授权信息中 的附加指示信息向 RN指示所分配的上行资源所在上行子帧的位置,所述附 加指示信息为上行子帧偏移指示信息, RN根据上行子帧偏移指示信息确定 所分配上行资源所在子帧位置;
当上行子帧偏移指示信息指示不进行偏移调整时, RN根据所述回程链 路时序表在子帧 n+k上根据上行资源授权信息所分配的资源进行上行传输; 当上行子帧偏移指示信息指示要进行偏移调整时, RN根据所述回程链 路时序表在子帧 n+k的基础上进行上行子帧偏移, 若所述上行子帧偏移指 示信息指示的子帧偏移量为 t, 则 RN在子帧 n+k之后的第 t个上行子帧上 根据上行资源授权信息所分配的资源进行上行传输; 其中 t为整数。
基于上述方法, 本发明还提出相应的回程链路上行资源配置指示及数 据传输的系统, 该系统包括 eNB和 RN;
eNB侧包括: 配置模块和下发模块; 其中,
配置模块:用于根据回程链路时序表对中继站 RN的回程链路上行资源 进行配置,或基于回程链路时序表对附加指示信息及中继站 RN的回程链路 上行资源进行配置, 所述附加指示信息用于在回程链路时序表的基础上对 回程链路上行资源所在上行子帧的位置进行调整;
下发模块: 用于根据配置模块的配置在指定的子帧上承载上行资源授 权信息发送给中继站;
中继站 RN侧包括: 上行子帧位置确定模块和上行传输模块; 其中, 上行子帧位置确定模块: 用于根据所述回程链路时序表, 或回程链路 时序表结合所述附加指示信息确定回程链路上行资源所在上行子帧的位 置;
上行传输模块: 用于在所述上行子帧位置确定模块确定的回程链路上 行资源所在上行子帧上根据所述下发模块下发的上行资源授权信息所分配 的资源进行上行传输。
进一步地, 所述配置模块包括:
上行资源配置模块:用于根据回程链路时序表对中继站 RN的回程链路 上行资源进行配置;
附加指示信息配置模块: 用于配置附加指示信息;
所述附加指示信息配置模块指特定子帧指示信息配置模块、 或子帧偏 移指示信息配置模块、 或上行子帧偏移指示信息配置模块:
特定子帧指示信息配置模块: 用于配置特定子帧指示信息为附加指示 信息; 所述特定子帧指示信息用于指示回程链路上行资源所在子帧为该特 定子帧指示信息所指示的子帧;
子帧偏移指示信息配置模块: 用于配置子帧偏移指示信息为附加指示 信息; 所述子帧偏移指示信息用于指示回程链路上行资源所在子帧相对于 根据回程链路时序表所确定的子帧之间的子帧偏移量;
上行子帧偏移指示信息配置模块: 用于配置上行子帧偏移指示信息为 附加指示信息; 所述上行子帧偏移指示信息用于指示回程链路上行资源所 在子帧相对于根据回程链路时序表所确定的子帧之间的上行子帧偏移量; 所述上行子帧位置确定模块包括:
基础位置确定模块, 用于根据回程链路时序表确定回程链路上行资源 所在子帧位置;
调整模块, 用于根据附加指示信息对所述基础位置确定模块确定的子 帧位置进行调整, 确定回程链路上行资源所在子帧位置, 其中附加指示信 息为特定子帧指示信息、 或子帧偏移指示信息、 或上行子帧偏移指示信息。
基于本发明另一方面, 提出另一种回程链路上行资源配置指示及数据 传输的方法, 该方法的技术方案是这样实现的:
一种回程链路上行资源配置指示及数据传输的方法, 包括:
eNB下发给 RN的回程链路上行资源授权信息所在的下行子帧与所分 配的上行资源所在上行子帧之间没有固定时序关系; eNB在子帧 n下发的 上行资源授权信息中除包含对物理资源的配置指示夕卜,还包含为 RN所分配 的上行资源所在上行子帧的子帧位置指示信息, RN根据所述子帧位置指示 信息在所指示的上行子帧上根据上行资源授权信息所分配的资源进行上行 传输。
进一步地, eNB 在回程链路的上行资源授权信息中包含的子帧位置指 示信息为特定子帧指示信息, RN在特定子帧指示信息指示的上行子帧上根 据上行资源授权信息所分配的资源进行上行传输;
所述特定子帧指示信息指示的特定子帧为当前无线帧中的上行子帧或 当前无线帧之后某无线帧中的上行子帧。
进一步地, eNB 在回程链路的上行资源授权信息中包含的子帧位置指 示信息为子帧偏移指示信息; 所述子帧偏移指示信息以相对于上行资源授 权信息所在的下行子帧的子帧偏移量 k指示所分配的上行资源所在上行子 帧位置, RN在子帧 n接收到上行资源授权信息后, 在子帧 n+k上根据上行 资源授权信息所分配的资源进行上行传输; 其中, 所述子帧偏移量 k为正 整数, 且子帧 n+k为上行子帧。
进一步地, eNB 在对回程链路的上行资源授权信息中包含的子帧位置 指示信息为上行子帧偏移指示信息; 所述上行子帧偏移指示信息以相对于 上行资源授权信息所在的下行子帧的上行子帧偏移量 L指示所分配的上行 资源所在的上行子帧位置, RN在子帧 n接收到上行资源授权信息后, 在子 帧 n后的第 L个上行子帧上根据上行资源授权信息所分配的资源进行上行 传输; 其中, 所述上行子帧偏移量 L为正整数。
基于上述方法, 本发明还提出相应的一种回程链路上行资源配置指示 及数据传输的系统, 该系统包括 eNB和 RN;
所述 eNB侧包括: 配置模块和下发模块; 其中,
配置模块: 用于对下发给中继站的上行资源授权信息进行配置; 所述 上行资源授权信息中除包含回程链路上行资源的配置指示外, 还包含为中 下发模块: 用于根据配置模块的配置在指定上行子帧上承载上行资源 授权信息发送给中继站;
所述 RN侧包括: 上行子帧位置确定模块和上行传输模块; 其中, 上行子帧位置确定模块: 用于根据上行资源授权信息中包含的子帧位 上行传输模块: 用于在所述上行子帧位置确定模块确定的上行子帧上 根据所述上行资源授权信息所分配的资源进行上行传输。
进一步地, 所述配置模块在所述上行资源授权信息中配置的为中继站 所分配的上行资源所在子帧的子帧位置指示信息为: 特定子帧指示信息、 或子帧偏移指示信息、 或上行子帧偏移指示信息;
所述特定子帧指示信息用于指示回程链路上行资源所在子帧为该特定 子帧指示信息所指示的子帧;
所述子帧偏移指示信息用于指示回程链路上行资源所在子帧相对于上 行资源授权信息所在子帧的子帧偏移量;
所述上行子帧偏移指示信息用于指示回程链路上行资源所在子帧相对 于上行资源授权信息所在子帧的上行子帧偏移量;
所述上行子帧位置确定模块, 根据所述上行资源授权信息包含的子帧 其中子帧位置指示信息为: 特定子帧指示信息、 或子帧偏移指示信息、 或上行子帧偏移指示信息。
本发明提出对 TDD系统 Backhaul Link的上行资源配置进行指示的一 些方法, 本发明建立 eNB与 RN之间的回程链路时序表, 在回程链路时序 表的基础上还可再配合在上行资源授权信息中的附加指示信息, 包括特定 子帧、 或子帧偏移、 或上行子帧偏移指示信息; 或直接在上行资源授权信 息中包含子帧位置指示信息, 包括特定子帧、 或子帧偏移、 或上行子帧偏 移指示信息, RN根据 eNB与 RN之间的回程链路时序表或根据回程链路时 序表和上行资源授权信息中的附加指示信息, 或根据上行资源授权信息中 的子帧位置指示信息来确定回程链路的上行资源所在子帧位置。 通过本发 明可实现对 Backhaul Link上行资源配置的有效指示,提高对 Backhaul Link 上行资源配置的灵活性, 适应系统需求, 提高资源利用率。 附图说明
图 1为中继网络结构示意图;
图 2为本发明实施例 1用于确定上行子帧位置的示意图;
图 3为本发明实施例 1用于确定上行子帧位置的示意图;
图 4为本发明实施例 2用于确定上行子帧位置的示意图;
图 5为本发明实施例 3用于确定上行子帧位置的示意图; 图 6为本发明实施例 4用于确定上行子帧位置的示意图; 图 7为本发明实施例 5用于确定上行子帧位置的示意图;
图 8为本发明实施例 6用于确定上行子帧位置的示意图;
图 9为本发明实施例 7用于确定上行子帧位置的示意图;
图 10 为本发明回程链路上行资源配置指示及数据传输系统逻辑结构 图。 具体实施方式
和 RN之间釆用基于 Timing Table的方式, eNB对配置给 RN的 Backhaul Link 上行资源进行指示, 在承载 UL Grant信息的下行子帧与所分配的 Backhaul Link 上行资源所在上行子帧之间建立固定的时序关系, 并且进一步在 Timing Table的基础上可通过附加指示信息,对所分配上行资源所在子帧进 行调整。 第二种方法不需要在 eNB下发给 RN的 UL Grant信息所在下行子 帧与所分配的上行资源所在上行子帧之间预定义固定的时序关系, RN完全 依赖于 eNB在 UL Grant信息中的子帧位置指示信息,获得所分配上行资源 所在的上行子帧位置信息。
实施例 1至实施例 4基于第一种方法实现, 实施例 5至实施例 7基于 第二种方法实现。
实施例 1: 基础 Timing Table方法
与 eNB对 UE进行配置指示的 Timing Table相似, 在 eNB与 RN之间 可建立特定的 Timing Table, 设置在 Backhaul Link上承载 UL Grant的下行 子帧与所分配上行资源所在子帧之间的固定时序关系。
表 2给出了 eNB与 RN之间给定的 Timing Table的一实例, 其中 D表 示对应子帧为下行子帧, U表示对应子帧为上行子帧, S表示特殊子帧, 对 Configuration 0-6在对应子帧 ( Subframe #0-#9 ) 中所给出的数值 k ( k为正 整数)代表以当前子帧 (即承载 UL Grant信息的子帧)所在位置为基准, 在其后的第 k个子帧上进行上行传输。 如图 1所示, 若在 n子帧 eNB下发 UL Grant, 则 RN在 n+k子帧上根据上行资源授权信息进行上行传输。 时分 双工 TDD系统中,承载回程链路上行资源授权信息的下行子帧为除 #0、 #1、 #5和 #6子帧之外的任意下行子帧 n。
表 2 A for TDD configurations 0-6 of Backhaul Link
Figure imgf000013_0001
如表 2所示,对于 configuration 0和 5 , 系统可设置为不支持 RN工作, 则 Timing Table的相应行为空。
如表 2及图 3所示, 对于 configuration 1 , 系统设置对 # 4子帧设置 k = 4 , 即在 # 4子帧 eNB向 RN下发 UL Grant, 则 RN在# 8子帧上根据所 分配的资源进行上行传输。对# 9子帧设置 k = 4 , 即在 # 9子帧 eNB向 RN 下发 UL Grant, 则 RN在下一个无线帧的# 3子帧上根据所分配的资源进行 上行传输。
如表 2所示, 对于 configuration 2 , 系统设置对# 3子帧设置 k = 4 , 即 在 #3子帧 eNB向 RN下发 UL Grant, 则 RN在# 7子帧上根据所分配的资 源进行上行传输, 如图 2所示。 对 #8子帧设置 k = 4 , 即在 #8子帧 eNB向 RN下发 UL Grant,则 RN在下一个无线帧的 #2子帧上根据所分配的资源进 行上行传输。
如表 2所示, 对于 configuration 3 , 系统设置对# 8子帧设置 k = 4 , 即 在 # 8子帧 eNB向 RN下发 UL Grant, 则 RN在下一无线帧的# 2子帧上根 据所分配的资源进行上行传输。 对 # 9子帧设置 k = 4 , 即在 # 9子帧 eNB 向 RN下发 UL Grant, 则 RN在下一个无线帧的 # 3子帧上根据所分配的资 源进行上行传输。
如表 2所示, 对于 configuration 4 , 系统设置对# 9子帧设置 k = 4 , 即 在 # 9子帧 eNB向 RN下发 UL Grant, 则 RN在下一无线帧的# 3子帧上根 据所分配的资源进行上行传输。
如表 2所示, 对于 configuration 6 , 系统设置对 # 9子帧设置 k = 5 , 即 在# 9子帧 eNB向 RN下发 UL Grant, 则 RN在下一无线帧的 #4子帧上根 据所分配的资源进行上行传输。
釆用基础 Timing Table方式时, 如图 2所示, 当系统配置釆用 TDD Configuration 2时, eNB可以在 #3子帧的下行 Backhaul Link资源中, 承载 对 RN的 UL Grant。 RN在 #3子帧接收到此 UL Grant信息后, 依据表 2所 示时序关系, 得到此 UL Grant所分配的上行资源在 #7子帧上, 将待传输数 据承载在 #7子帧相应的上行资源上向 eNB进行上行传输。
在一个无线帧内 eNB可以配置 RN在两个子帧上进行 Backhaul Link上 行传输, 如图 3所示, 在 Configuration 1下 eNB分别在 #4, #9子帧的下行 Backhaul Link资源中, 承载对 RN的 UL Grant。 RN接收到 #4子帧中的 UL Grant信息后, 依据表 2得到此 UL Grant所分配的上行资源在 #8子帧上, 接收到 #9子帧中的 UL Grant信息后,则得到对下一无线帧的 #3子帧的上行 资源配置。并将相应数据承载在 #8子帧及下一无线帧的 #3子帧向 eNB进行 上行传输。 另外, 系统可以根据需要令某些 Configuration不支持 Relay。 如表 2中 所示, Configuration 0和 5没有设置 k值, 则当系统配置使用 Configuration 0或 5时, 系统不支持 Relay工作。
在基础 Timing Table方法的基础上, eNB可以在 Backhaul Link上行资 源授权信息中设置附加指示信息,向 RN指示所分配上行资源所在上行子帧 的位置。
实施例 2: 附加指示信息为特定子帧指示信息
该方法基于实施例 1的基础 Timing Table方法,该方法根据 eNB与 RN 之间的 Timing Table以及 eNB下发给 RN的上行资源授权信息中包含的特 定子帧指示信息来确定上行资源所在的子帧位置。
若特定子帧指示信息未指示某子帧时,则 RN根据 Timing Table预定义 的时序关系在 n+k子帧上根据所分配的资源进行上行传输; 若特定子帧指 示信息中包含子帧位置 c, 则 RN按照特定子帧指示信息的指示, 在 c子帧 上根据所分配的上行资源进行上行传输。
如表 2及图 4所示, 在 TDD configuration 3配置下, eNB在 #8子帧向
RN发送 UL Grant信息及特定子帧指示信息。 当特定子帧指示信息未指定 特定子帧, 即 c=non时, RN根据预定义的 Timing Table在下一无线帧的 #2 信息 c指示为下一无线帧 #3子帧时, 则 RN按照指示在下一无线帧的 #3子 帧根据所分配的上行资源进行上行传输。
实施例 3: 附加指示信息为子帧偏移指示信息
该方法基于实施例 1的基础 Timing Table方法,该方法根据 eNB与 RN 之间的 Timing Table以及 eNB下发给 RN的上行资源授权信息中包含的子 帧偏移指示信息来确定上行资源所在的子帧位置。
若子帧偏移指示信息指示不需要进行子帧偏移, 则 RN根据 Timing Table预定义的时序关系在 n+k子帧上根据所分配的资源进行上行传输; 若 子帧偏移指示信息指示需进行子帧偏移, 则 RN根据偏移指示信息在根据 Timing Table确定的子帧位置基础上进行子帧偏移, 进行上行传输。
如表 2及图 5所示, 在 TDD configuration 6配置下, #9子帧对应的 k 值为 5 , 基于基础 Timing Table方法, 上行资源所在的子帧为下一无线帧的 #4子帧。 eNB在 #9子帧向 RN发送 UL Grant信息及子帧偏移指示信息, 当 子帧偏移指示信息指示不需要进行子帧偏移时, 即 s = 0时, RN根据预定 义的 Timing Table 在下一无线帧的 #4 子帧上按所分配的上行资源进行 Backhaul Link上行传输。 当子帧偏移指示信息指示需进行 s = -1 的子帧偏 当子帧偏移指示信息指示需进行偏移, 偏移量 s = 4时, 则 RN在下一无线 帧的 #8子帧在所分配的上行资源上向 eNB进行上行传输。
实施例 4: 附加指示信息为上行子帧偏移指示信息
该方法基于实施例 1的基础 Timing Table方法,该方法根据 eNB与 RN 之间的 Timing Table以及 eNB下发给 RN的上行资源授权信息中包含的上 行子帧偏移指示信息来确定上行资源所在的子帧位置。
根据 Backhaul Link预定义的 Timing Table及上行子帧偏移指示信息, RN获得所分配上行资源所在的子帧位置。若上行子帧偏移指示信息指示不 需要进行子帧偏移时, RN根据 Timing Table预定义的时序关系在 n+k子帧 上根据所分配的资源进行上行传输; 若上行子帧偏移指示信息指示需进行 子帧偏移, 则 RN根据上行子帧偏移指示信息在 Timing Table设置的 n+k 子帧之后的第 t个上行子帧上进行上行传输。
如表 2及图 6所示, 在 TDD configuration 6配置下, eNB在 #9子帧向 RN发送 UL Grant信息及上行子帧偏移指示信息。 当上行子帧偏移指示信 息指示不需要进行子帧偏移时, 即 t = 0时, RN根据预定义的 Timing Table 在下一无线帧的 #4子帧上按所分配的上行资源进行 Backhaul Link上行传 输。 当上行子帧偏移指示信息指示 t = -l 时, 则 RN在下一无线帧的 #4子 当上行子帧偏移指示信息 t = 1时,则 RN在下一无线帧的 #4子帧之后的第 第二种方法 RN根据 eNB在 UL Grant信息中的子帧位置指示信息, 获 得所分配上行资源所在的上行子帧位置信息。
实施例 5: 子帧位置指示信息为特定子帧指示信息
eNB对 RN进行 Backhaul Link上行资源配置的指示时, UL Grant信息 中除包含对物理资源的配置指示之外,还包含为 RN所分配的上行资源所在 上行子帧的子帧位置指示信息, 该子帧位置指示信息以具体子帧号进行指 示, 表示在所指示的某特定子帧上, RN按照 UL Grant信息配置指示的上 行资源进行 Backhaul Link上行传输。
eNB指示 RN对 Backhaul Link的 UL Grant信息以及特定子帧 c, RN 接收到这些信息后,根据指示在特定子帧 c上按照所分配的上行资源向 eNB 进行上行传输。
如图 7所示, 在 TDD configuration 1配置下, 若 eNB在 #4子帧指示 RN对 Backhaul Link的 UL Grant信息并指示在当前无线帧的 #8子帧进行上 行传输, RN接收到此信息指示后,将待上行传输数据承载在 #8子帧所分配 的上行资源上传输给 eNB。 类似的, eNB 也可以在 #4 子帧指示 RN 对 Backhaul Link的 UL Grant信息并指示在下一无线帧的 #2子帧进行上行传 输, 则 RN将待上行传输数据承载在下一无线帧的 #2子帧所分配的上行资 源上传输给 eNB。
实施例 6: 子帧位置指示信息为子帧偏移指示信息
eNB对 RN进行 Backhaul Link上行资源配置的指示时, UL Grant信息 中包含对物理资源的配置指示之外,还包含为 RN所分配的上行资源所在上 行子帧的子帧位置指示信息, 该子帧位置指示信息以子帧偏移量 k进行指 示, 表示 RN在 n子帧接收到 UL Grant信息后, 在 n+k子帧上按所分配的 上行资源进行 Backhaul Link上行传输, 其中 k为正整数, 且 n+k子帧为上 行子帧。
如图 8所示, 在 TDD configuration 3配置下, 若 eNB在 #8子帧向 RN 指示 UL Grant及相应的子帧偏移量, 当子帧偏移量指示 k = 4时, RN在下 一无线帧的 #2子帧根据所分配的上行资源向 eNB进行上行传输;当子帧偏 移量指示 k = 5时, RN则将待传输数据承载在下一无线帧的 #3子帧上进行 上行传输。
实施例 7: 子帧位置指示信息为上行子帧偏移指示信息
eNB对 RN进行 Backhaul Link上行资源配置的指示时, UL Grant信息 中包含对物理资源的配置指示之夕卜,还需要包含指示 RN所配置的上行资源 所在子帧的信息。 所述上行子帧所在子帧的信息以上行子帧偏移量 L进行 指示, 表示 RN在 n子帧接收到 UL Grant信息后, 在其后的第 L个上行子 帧上按照所分配的上行资源向 eNB进行上行传输, 其中 L为正整数。
如图 9所示, 在 TDD configuration 3配置下, 若 eNB在 #8子帧向 RN 指示 UL Grant, 及相应的上行子帧偏移量, 当上行子帧偏移量指示 L = 1 时, RN在下一无线帧的 #2子帧根据所分配的上行资源向 eNB进行上行传 输;当上行子帧偏移量指示 L = 3时, RN则将待传输数据承载在下一无线帧 的# 4子帧上进行上行传输。
图 10为本发明回程链路上行资源配置指示及数据传输的系统逻辑结构 图, eNB 侧包括配置模块和下发模块, 中继站侧包括上行子帧位置确定模 块和上行传输模块。配置模块用于根据回程链路时序表对中继站 RN的回程 链路上行资源进行配置, 或进一步对回程链路上行资源所在上行子帧的位 置进行配置, 例如在上行资源授权信息中增加附加指示信息的配置或子帧 位置指示信息的配置; 下发模块用于根据配置模块的配置在指定的子帧上 承载上行资源授权信息发送给中继站; 上行子帧位置确定模块用于确定回 程链路上行资源所在上行子帧; 上行传输模块用于在上行子帧位置确定模 块确定的上行子帧上根据所述下发模块下发的上行资源授权信息所分配的 资源进行上行传输。
以上所述, 仅为本发明的较佳实施例而已, 并非用于限定本发明的保 护范围。

Claims

权利要求书
1、 一种回程链路上行资源配置指示及数据传输的方法, 其特征在于, 该方法包括:
演进型基站(eNB )根据回程链路时序表, 或在回程链路时序表的基础 上结合上行资源授权信息中的附加指示信息, 向中继站 (RN )指示所分配 的上行资源所在上行子帧的位置; RN根据回程链路时序表、 或回程链路时 序表及附加指示信息, 在所分配的上行子帧进行上行传输。
2、 根据权利要求 1所述的方法, 其特征在于, 所述回程链路时序表中 包括有承载回程链路上行资源授权信息的下行子帧 n与所分配的回程链路 上行资源所在的上行子帧之间的子帧间隔 k, k为正整数。
3、 根据权利要求 2所述的方法, 其特征在于, 该方法还包括: 对时分 双工系统的配置 0至配置 6 中的下行子帧 n分别设置所述 k值, 构成所述 回程链路时序表, 所述回程链路时序表中不同配置下的 k值设置具体为: 针对配置 0和配置 5 , 不设置所述 k值;
针对配置 1 , #4、 #9子帧对应的 k值设置为 4;
针对配置 2, #3、 #8子帧位置的 k值设置为 4;
针对配置 3 , #8、 #9子帧位置的 k值设置为 4;
针对配置 4, #9子帧位置的 k值设置为 4;
针对配置 6, #9子帧位置的 k值设置为 5。
4、 根据权利要求 2所述的方法, 其特征在于, 该方法还包括: eNB在 子帧 n向 RN下发对回程链路的上行资源授权信息, RN根据所述回程链路 时序表在子帧 n+k上向 eNB进行上行传输。
5、 根据权利要求 2所述的方法, 其特征在于, 该方法还包括: eNB在 回程链路时序表的基础上结合上行资源授权信息中的附加指示信息,向 RN 指示所分配的上行资源所在上行子帧的位置, 所述附加指示信息为特定子 帧指示信息, RN根据所述特定子帧指示信息确定所分配上行资源所在子帧 位置;
当所述特定子帧指示信息中未指示某具体子帧时, RN根据所述回程链 路时序表在子帧 n+k上根据上行资源授权信息所分配的资源进行上行传输; 当所述特定子帧指示信息中指示特定子帧 c时, RN在所指示的子帧 c 上根据上行资源授权信息所分配的资源进行上行传输。
6、 根据权利要求 2所述的方法, 其特征在于, 该方法还包括: eNB在 回程链路时序表的基础上结合上行资源授权信息中的附加指示信息,向 RN 指示所分配的上行资源所在上行子帧的位置, 所述附加指示信息为子帧偏 移指示信息, RN根据所述子帧偏移指示信息确定所分配上行资源所在子帧 位置;
当子帧偏移指示信息指示不进行偏移调整时, RN根据所述回程链路时 序表在子帧 n+k上根据上行资源授权信息所分配的资源进行上行传输; 当子帧偏移指示信息指示要进行偏移调整时, RN根据所述回程链路时 序表在子帧 n+k的基础上进行子帧偏移, 若所述子帧偏移指示信息指示的 子帧偏移量为 s, 则 RN在子帧 n+k+s上根据上行资源授权信息所分配的资 源进行上行传输; 其中, s为整数, 且子帧 n+k+s为上行子帧。
7、 根据权利要求 2所述的方法, 其特征在于, 该方法还包括: eNB在 回程链路时序表的基础上结合上行资源授权信息中的附加指示信息,向 RN 指示所分配的上行资源所在上行子帧的位置, 所述附加指示信息为上行子 帧偏移指示信息, RN根据上行子帧偏移指示信息确定所分配上行资源所在 子帧位置;
当上行子帧偏移指示信息指示不进行偏移调整时, RN根据所述回程链 路时序表在子帧 n+k上根据上行资源授权信息所分配的资源进行上行传输; 当上行子帧偏移指示信息指示要进行偏移调整时, RN根据所述回程链 路时序表在子帧 n+k的基础上进行上行子帧偏移, 若所述上行子帧偏移指 示信息指示的子帧偏移量为 t, 则 RN在子帧 n+k之后的第 t个上行子帧上 根据上行资源授权信息所分配的资源进行上行传输; 其中 t为整数。
8、 一种回程链路上行资源配置指示及数据传输的方法, 其特征在于, 该方法包括:
eNB下发给 RN的回程链路上行资源授权信息所在的下行子帧与所分 配的上行资源所在上行子帧之间没有固定时序关系; eNB在子帧 n下发的 上行资源授权信息中除包含对物理资源的配置指示夕卜,还包含为 RN所分配 的上行资源所在上行子帧的子帧位置指示信息, RN根据所述子帧位置指示 信息, 在所指示的上行子帧上根据上行资源授权信息所分配的资源进行上 行传输。
9、 根据权利要求 8所述的方法, 其特征在于, 该方法还包括: eNB在 回程链路的上行资源授权信息中包含的所述子帧位置指示信息为特定子帧 指示信息, RN在所述特定子帧指示信息指示的上行子帧上根据上行资源授 权信息所分配的资源进行上行传输;
所述特定子帧指示信息指示的特定子帧为当前无线帧中的上行子帧或 当前无线帧之后某无线帧中的上行子帧。
10、 根据权利要求 8 所述的方法, 其特征在于, 该方法还包括: eNB 在回程链路的上行资源授权信息中包含的子帧位置指示信息为子帧偏移指 示信息; 所述子帧偏移指示信息以相对于上行资源授权信息所在的下行子 帧的子帧偏移量 k指示所分配的上行资源所在上行子帧位置, RN在子帧 n 接收到上行资源授权信息后, 在子帧 n+k上根据上行资源授权信息所分配 的资源进行上行传输;
其中, 所述子帧偏移量 k为正整数, 且子帧 n+k为上行子帧。
11、 根据权利要求 8 所述的方法, 其特征在于, 该方法还包括: eNB 在对回程链路的上行资源授权信息中包含的子帧位置指示信息为上行子帧 偏移指示信息; 所述上行子帧偏移指示信息以相对于上行资源授权信息所 在的下行子帧的上行子帧偏移量 L指示所分配的上行资源所在的上行子帧 位置, RN在子帧 n接收到上行资源授权信息后, 在子帧 n后的第 L个上行 子帧上根据上行资源授权信息所分配的资源进行上行传输; 其中, 所述上 行子帧偏移量 L为正整数。
12、 一种回程链路上行资源配置指示及数据传输的系统, 其特征在于, 包括 eNB和 RN;
所述 eNB侧包括: 配置模块和下发模块; 其中,
配置模块:用于根据回程链路时序表对 RN的回程链路上行资源进行配 置,或基于回程链路时序表对附加指示信息及 RN的回程链路上行资源进行 配置, 所述附加指示信息用于在回程链路时序表的基础上对回程链路上行 资源所在上行子帧的位置进行调整;
下发模块: 用于根据配置模块的配置在指定的子帧上承载上行资源授 权信息发送给 RN;
所述 RN侧包括: 上行子帧位置确定模块和上行传输模块; 其中, 上行子帧位置确定模块: 用于根据所述回程链路时序表, 或根据回程 链路时序表结合所述附加指示信息确定回程链路上行资源所在上行子帧的 位置;
上行传输模块: 用于在所述上行子帧位置确定模块确定的回程链路上 行资源所在上行子帧上根据所述下发模块下发的上行资源授权信息所分配 的资源进行上行传输;
所述回程链路时序表中包括有承载回程链路上行资源授权信息的下行 子帧 n与所分配的回程链路上行资源所在的上行子帧之间的子帧间隔 k, k 为正整数。
13、 根据权利要求 12所述的系统, 其特征在于, 所述配置模块包括: 上行资源配置模块:用于根据回程链路时序表对中继站 RN的回程链路 上行资源进行配置;
附加指示信息配置模块: 用于配置附加指示信息;
所述附加指示信息配置模块指特定子帧指示信息配置模块、 或子帧偏 移指示信息配置模块、 或上行子帧偏移指示信息配置模块:
特定子帧指示信息配置模块: 用于配置特定子帧指示信息为所述附加 指示信息; 所述特定子帧指示信息用于指示回程链路上行资源所在子帧为 该特定子帧指示信息所指示的子帧;
子帧偏移指示信息配置模块: 用于配置子帧偏移指示信息为所述附加 指示信息; 所述子帧偏移指示信息用于指示回程链路上行资源所在子帧相 对于根据回程链路时序表所确定的子帧之间的子帧偏移量;
上行子帧偏移指示信息配置模块: 用于配置上行子帧偏移指示信息为 所述附加指示信息; 所述上行子帧偏移指示信息用于指示回程链路上行资 源所在子帧相对于根据回程链路时序表所确定的子帧之间的上行子帧偏移 量;
所述上行子帧位置确定模块包括:
基础位置确定模块, 用于根据回程链路时序表确定回程链路上行资源 所在子帧位置;
调整模块, 用于根据附加指示信息对所述基础位置确定模块确定的子 帧位置进行调整, 确定回程链路上行资源所在子帧位置, 其中附加指示信 息为特定子帧指示信息、 或子帧偏移指示信息、 或上行子帧偏移指示信息。
14、 一种回程链路上行资源配置指示及数据传输的系统, 其特征在于, 包括 eNB和 RN;
所述 eNB侧包括: 配置模块和下发模块; 其中, 配置模块: 用于对下发给 RN的上行资源授权信息进行配置; 所述上行 资源授权信息中除包含回程链路上行资源的配置指示外,还包含为 RN所分 配的上行资源所在上行子帧的子帧位置指示信息;
下发模块: 用于根据配置模块的配置在指定上行子帧上承载上行资源 授权信息发送给 RN;
所述 RN侧包括: 上行子帧位置确定模块和上行传输模块; 其中, 上行子帧位置确定模块: 用于根据上行资源授权信息中包含的所述子 上行传输模块: 用于在所述上行子帧位置确定模块确定的上行子帧上 根据所述上行资源授权信息所分配的资源进行上行传输。
15、 根据权利要求 14所述的系统, 其特征在于:
所述配置模块在所述上行资源授权信息中配置的为中继站所分配的上 行资源所在子帧的子帧位置指示信息为: 特定子帧指示信息、 或子帧偏移 指示信息、 或上行子帧偏移指示信息;
所述特定子帧指示信息用于指示回程链路上行资源所在子帧为该特定 子帧指示信息所指示的子帧;
所述子帧偏移指示信息用于指示回程链路上行资源所在子帧相对于上 行资源授权信息所在子帧的子帧偏移量;
所述上行子帧偏移指示信息用于指示回程链路上行资源所在子帧相对 于上行资源授权信息所在子帧的上行子帧偏移量;
所述上行子帧位置确定模块, 根据所述上行资源授权信息包含的子帧 其中, 子帧位置指示信息为: 特定子帧指示信息、 或子帧偏移指示信 息、 或上行子帧偏移指示信息。
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