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WO2015143614A1 - Méthode et dispositif d'attribution de ressources de radiofréquence pour ue à radiofréquence unique - Google Patents

Méthode et dispositif d'attribution de ressources de radiofréquence pour ue à radiofréquence unique Download PDF

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Publication number
WO2015143614A1
WO2015143614A1 PCT/CN2014/073982 CN2014073982W WO2015143614A1 WO 2015143614 A1 WO2015143614 A1 WO 2015143614A1 CN 2014073982 W CN2014073982 W CN 2014073982W WO 2015143614 A1 WO2015143614 A1 WO 2015143614A1
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WIPO (PCT)
Prior art keywords
base station
downlink
uplink
macro base
subframe
Prior art date
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Ceased
Application number
PCT/CN2014/073982
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English (en)
Chinese (zh)
Inventor
乌力吉
蔺波
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Huawei Technologies Co Ltd
Original Assignee
Huawei Technologies Co Ltd
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 Huawei Technologies Co Ltd filed Critical Huawei Technologies Co Ltd
Priority to CN201480001167.8A priority Critical patent/CN105165093B/zh
Priority to PCT/CN2014/073982 priority patent/WO2015143614A1/fr
Publication of WO2015143614A1 publication Critical patent/WO2015143614A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/12—Wireless traffic scheduling

Definitions

  • the present invention relates to the field of mobile communication technologies, and in particular, to a single radio frequency UE radio resource allocation method and apparatus.
  • a Carrier Aggregation (CA) technology is introduced in LTE Release 10, that is, a User Equipment (UE) can be served by multiple downlink and/or uplink carriers to improve the data transmission rate of the UE.
  • the UE in the carrier aggregation technology may have two serving cells of different downlink carriers, and each downlink carrier corresponds to one uplink carrier.
  • the UE may also be an uplink carrier shared by two downlink carriers.
  • the Physical Uplink Control CHannel (PUCCH) for uplink is only on the uplink carrier of the primary cell (Pcell) of multiple downlink cells facing the UE. presence.
  • the information sent by the UE to the secondary cell (Scell) through the PUCCH of the Pcell can reach the Scell in time, that is, the Pcell and the Scell, because the two cells serving the same UE in the CA technology are optically connected or co-located.
  • the link between them is the ideal backhaul link.
  • the UE can be simultaneously served by a macro cell and a small cell, that is, a dual-link scenario, and a macro cell and a small cell are linked by a non-ideal backhaul network.
  • a macro cell and a small cell are linked by a non-ideal backhaul network.
  • the UE has only one receiving radio frequency (RF) and one transmitting RF (ie, single-issue sending);
  • the UE has one receiving RF and multiple sending RFs (ie, multiple receiving multiple transmissions);
  • the UE has multiple receiving RFs and one transmitting RF (ie, multiple receiving singles); D, the UE has multiple receiving RFs and multiple transmitting RFs (ie, multiple receiving multiple transmissions).
  • one UE is served by two cells of different downlink carriers. Because the frequency points of the two cells are different, the UE needs to switch between different frequency points. In this scenario, RF retiming needs to be considered. In addition, because the non-ideal backhaul link between the macro cell and the small cell has a delay in data transmission, another factor to be considered in this scheme is the round-trip interval timer of the hybrid automatic repeat request (Hybrid) Automatic Repeat Request Round Trip Time, HARQ RTT timer ) 0
  • RF retiming refers to: When the RF RF chain of the UE moves from one frequency point to another frequency point; when RF retuning occurs, the UE is spaced approximately 0.6 due to the limitation of the RF chain component. After ms, the new frequency can work. Therefore, when the RF chain is re-tuned for the next millisecond, the UE's RF will be one subframe. That is, if the downlink RF is re-tuned, the UE cannot receive the next millisecond in which the re-tuning occurs; if the uplink RF is re-tuned, the UE cannot transmit in the next millisecond in which the re-tuning occurs.
  • the HARQ RTT timer is configured to be 8 ms, that is, when the network side is 8 ms, the network side checks whether the data sent by the macro cell to the UE is successfully received. If the ACK message sent by the UE side is received, the macro cell data is determined. The transmission is successful; if it is NACK, it is unsuccessful; for TDD, the HARQ RTT timer is configured to be k+4ms, and k is a minimum value that can be fed back ACK/NACK according to the TDD ratio type.
  • the uplink feedback can only be fed back to one site.
  • the UE receives the physical downlink shared channel physics of the Small cell. (Physical Downlink Shared Channel, PDSCH)
  • the HARQ feedback is sent on the PUCCH of the Macro cell
  • the Macro cell receives the HARQ feedback, and then forwards the message to the small cell, and the UE sends the channel state information on the PUCCH of the Macro cell.
  • State information (CSI) feedback macro cell received and forwarded to small celL.
  • the typical delay of a non-ideal backhaul network in a dual-link scenario is 20ms.
  • the HARQ feedback or CSI feedback forwarded by the macro cell cannot reach the small cell in time, can not meet the requirements of the HARQ sequence (requires 4ms to obtain feedback) or the scheduling module requires the timeliness of the CSI feedback.
  • the UE After receiving the downlink data sent by the small cell through the PDSCH, the UE sends the HARQ feedback on the PUCCH of the Macro cell. After receiving the macro cell, the macro cell sends the CSI feedback to the small cell, and the UE sends the CSI feedback on the PUCCH of the Macro cell. Forward to the small cell.
  • the time that the downlink subframe of the UE is received on the Macro cell is: subframes n+0, n+l, n+2; the time when the downlink subframe is converted between the two cells is Frame n+3; the time that the downlink subframe is received on the Small cell is subframes n+4, n+5, n+6.
  • the time that the uplink subframe of the UE is sent on the small cell is: subframe n+0, n+1, n+2; the time when the uplink subframe is converted between two cells is subframe n+3; uplink subframe The time sent on the Small cell is subframes n+4, n+5, n+6.
  • the dual link is implemented by the foregoing method.
  • the Pico cell cannot be scheduled, and the downlink throughput of the UE is decreased.
  • the LTE technology cannot be applied to the multi-base station to provide services for the UE in the scenario of one uplink carrier.
  • the UE cannot effectively feedback the HARQ feedback or CSI feedback to the multi-base station, and the downlink throughput is not reduced, and the delay is not reduced. Set the threshold. Summary of the invention
  • a macro base station is provided, where the macro base station and the small base station are serving base stations of a user equipment UE having only one uplink radio frequency chain RF, and the macro base station and the small base station operate at different frequencies, the macro base station includes :
  • a determining unit configured to determine a proportion configuration type of the uplink and downlink resources of the UE
  • a slot interval determining unit configured to determine, according to the determined proportion configuration type, a number of special subframes and downlink subframes between any two adjacent uplink subframe sets in the radio frame, according to the special subframe and the downlink sub-frame The number of frames is determined by an interval between any two adjacent uplink subframe sets; wherein the uplink subframe set is composed of one uplink subframe or multiple consecutive uplink subframes;
  • a feedback slot coordinating unit configured to determine, according to the interval time, the determined uplink subframe set in the radio frame as the first downlink feedback slot corresponding to the macro base station and the second downlink feedback slot corresponding to the small base station, where The first downlink feedback time slot and the second downlink feedback time slot are separated by an interval time;
  • a first instruction processing unit configured to generate a first control instruction according to the first downlink feedback time slot and the second downlink feedback time slot, and send the first control instruction to the small base station, where the first control instruction And receiving, by the small base station and the macro base station, uplink feedback of the UE in different uplink subframe sets.
  • the feedback time slot coordination unit determines that the interval time is RF retuning RF retiming time.
  • the macro base station when the UE has only one downlink radio frequency chain, when the macro base station and the small base station work in a time division duplex TDD mode, the macro base station further includes:
  • a subframe number determining unit configured to determine, according to the proportion configuration type, a location of a downlink subframe set of the UE and a number of subframes in the downlink subframe set;
  • a second instruction processing unit configured to: when determining that the number of subframes included in each uplink subframe set is not less than 2, generate a second control according to the downlink subframe set position and the number of subframes in the downlink subframe set And transmitting, by the second control instruction, the second control instruction to the UE and the small base station, where the second control instruction is used to instruct the small base station to send downlink data in a downlink subframe, and instruct the UE to use an uplink RF Receiving downlink data sent by the small base station at a position of the downlink subframe, and switching back to the uplink RF in a last subframe and a special subframe in the uplink subframe set.
  • the second instruction processing unit is further configured to use a broadcast message, a radio resource control RRC signaling, and a media access control layer control. a combination of one or more of a unit MAC CE or a physical layer command, the second control command being sent to the UE and the small base station.
  • the first control instruction sent by the first instruction processing unit includes the macro base The round-trip interval timer HARQ RTT timer of the hybrid automatic repeat request of the station, so that the small base station sets its own HARQ RTT timer after receiving the HARQ RTT timer of the macro base station
  • the present disclosure provides a user equipment, where the user equipment includes:
  • the receiving module receives the first control command sent by the macro base station, and receives downlink data sent by the macro base station and the small base station;
  • a feedback time slot determining unit configured to determine, according to the first control instruction, a first downlink feedback time slot and a second downlink feedback time slot corresponding to the macro base station and the small base station;
  • a sending module configured to feed back, by using the first downlink feedback time slot and the second downlink feedback time slot, feedback information of the downlink data to the macro base station and the small base station, respectively.
  • the sending module is further used in the first downlink.
  • the RF retuning RF retiming is performed at intervals between the feedback slot and the second downlink feedback slot.
  • the receiving module is further configured to receive the second control After the command, receiving, by using the uplink RF, the downlink data sent by the small base station in the downlink subframe according to the second control instruction, and in the last subframe or special of the uplink subframe set The subframe is switched back to the upstream RF.
  • the present invention further provides a single radio frequency UE radio resource allocation method, where the macro base station and the small base station are serving base stations of a user equipment UE having only one uplink radio frequency chain RF, and the macro base station and the small base station work differently. Frequency, then the method includes:
  • the macro base station Determining, by the macro base station, the number of special subframes and downlink subframes between any two adjacent uplink subframe sets in the radio frame according to the determined proportion configuration type, according to the number of the special subframes and the downlink subframes Determining an interval between the two adjacent uplink subframe sets; where the uplink subframe set is composed of one uplink subframe or multiple consecutive uplink subframes;
  • the macro base station Generating, by the macro base station, a first control instruction according to the first downlink feedback time slot and the second downlink feedback time slot, and sending the first control instruction to the small base station, where the first control instruction is used for the small base station And the macro base station receives the uplink feedback of the UE in different uplink subframe sets.
  • the macro base station determines that the interval time is an RF retuning RF retiming time.
  • the method further includes:
  • the macro base station determines that the number of subframes included in each uplink subframe set is not less than 2, generates a second control instruction according to the downlink subframe set position and the number of subframes in the downlink subframe set, and The second control command is sent to the UE and the small base station, and the second control instruction is used to instruct the small base station to send downlink data in a downlink subframe, and instruct the UE to use uplink RF in the downlink.
  • the location of the subframe receives the downlink data sent by the small base station, and is the last one in the uplink subframe set. The subframes and special subframes are switched back to the uplink RF.
  • the sending, by the second control instruction, the UE and the small base station includes:
  • the first control instruction includes a round trip of the hybrid automatic repeat request of the macro base station
  • the time interval timer HARQ RTT timer is configured to enable the small base station to set its own HARQ RTT timer after receiving the HARQ RTT timer of the macro base station.
  • the present disclosure further provides a single radio frequency using method, where the method includes:
  • the user equipment feeds back feedback information of the downlink data to the macro base station and the small base station, respectively, by using the first downlink feedback time slot and the second downlink feedback time slot.
  • the method further includes:
  • the user equipment performs RF retiming RF retiming at intervals between the first downlink feedback slot and the second downlink feedback slot.
  • the method further includes:
  • the uplink RF After receiving the second control command sent by the macro base station, using the uplink RF to receive downlink data sent by the small base station in a downlink subframe according to the second control instruction, and in the uplink subframe The last subframe or special subframe of the set is switched back to the upstream RF.
  • the macro base station and the small base station can determine an uplink subframe set in one or two consecutive radio frames, and then coordinately allocate multiple uplink subframe sets according to a preset rule.
  • the macro base station or the small base station is provided, so that the macro base station and the small base station can provide services to the UE without conflict.
  • the solution provided by the present invention can enable a UE (only a single-transmission multi-receive and a single-received UE) that is provided with only one uplink radio frequency chain to enjoy the gain of the dual-link network.
  • FIG. 1 is a schematic diagram of allocation of each subframe of a network dual link deployment in the prior art
  • FIG. 2 is a schematic structural diagram of a macro base station according to an embodiment of the present invention.
  • FIG. 3 is a schematic structural diagram of a user equipment according to an embodiment of the present disclosure.
  • FIG. 4 is a schematic flowchart of a single radio frequency UE radio resource allocation method according to an embodiment of the present disclosure
  • FIG. 5 is a schematic flowchart of a method for using a single radio frequency according to an embodiment of the present invention
  • FIG. 6 is a schematic diagram of allocation of each subframe in a usage environment of a first embodiment according to an embodiment of the present invention
  • FIG. 7 is a schematic diagram of the allocation of each subframe in the usage environment of the second embodiment according to the method provided by the embodiment of the present invention.
  • FIG. 8 is a schematic diagram of the allocation of each subframe in the use environment of the third embodiment according to the method provided by the embodiment of the present invention. detailed description
  • the embodiment of the present invention provides a macro base station, where the macro eNB and the small eNB are serving base stations of a user equipment UE, and the macro base station and the small base station operate at different frequencies, and the macro base station and the macro base station.
  • the small base station is a serving base station of a user equipment UE having only one uplink radio frequency chain RF, and the macro base station includes:
  • a determining unit configured to determine a proportion configuration type of the uplink and downlink resources of the UE
  • a slot interval determining unit configured to determine, according to the determined proportion configuration type, a number of special subframes and downlink subframes between any two adjacent uplink subframe sets in the radio frame, according to the special subframe and the downlink sub-frame The number of frames is determined by an interval between any two adjacent uplink subframe sets; wherein the uplink subframe set is composed of one uplink subframe or multiple consecutive uplink subframes;
  • a feedback slot coordinating unit configured to determine, according to the interval time, the determined uplink subframe set in the radio frame as the first downlink feedback slot corresponding to the macro base station and the second downlink feedback slot corresponding to the small base station, where The first downlink feedback time slot and the second downlink feedback time slot are separated by an interval time;
  • a first instruction processing unit configured to generate a first control instruction according to the first downlink feedback time slot and the second downlink feedback time slot, and send the first control instruction to the small base station, where the first control instruction And receiving, by the small base station and the macro base station, uplink feedback of the UE in different uplink subframe sets.
  • the base station provided by the embodiment of the present invention can determine an uplink subframe set in one or two consecutive radio frames, and then multiple uplink sub-frames.
  • the frame set is reasonably allocated to the macro base station or the small base station, so that the macro base station and the small base station can provide services to the UE without conflict. Therefore, the solution provided by the present invention can enable a UE with only one uplink radio frequency chain (including single-transmission multi-reception and single-transmission single-receiving).
  • Embodiment 1 is a diagrammatic representation of Embodiment 1:
  • an embodiment of the present invention provides a macro base station 200, where the macro base station and the small base station are serving base stations of a user equipment UE having only one uplink radio frequency chain RF, and the macro base station and the small base station work differently. Frequency, then the macro base station includes:
  • the determining unit 201 is configured to determine a proportion configuration type of the uplink and downlink resources of the UE;
  • the LTE TDD system of the current version 8 includes the configuration of the ratio of the uplink and downlink resources of the seven different TDDs.
  • the specific configuration is shown in Table 1.
  • D indicates a downlink subframe
  • S indicates a special subframe
  • U indicates an uplink subframe. .
  • the UE may select any one of the foregoing seven types for resource allocation, because the solution provided by the embodiment of the present invention needs to be established on the basis of the foregoing frame structure, and the uplink subframe in the radio frame is used.
  • the slot interval determining unit 202 is configured to determine, according to the determined proportion configuration type, the number of special subframes and downlink subframes between any two adjacent uplink subframe sets in the radio frame, according to the special subframe and the downlink.
  • the number of subframes is determined by an interval between any two adjacent uplink subframe sets; wherein the uplink subframe set is composed of one uplink subframe or multiple consecutive uplink subframes;
  • the slot interval determining unit in the embodiment of the present invention uses the subframes 2, 3, and 4 as one uplink subframe set, and the subframe.
  • the macro base station needs to determine the time interval between the two subframe sets in order to indicate that the self and the small base station transmit data in different subframe sets, so that the reception can be determined according to the time interval. Or the location of the subframe in which the data is sent. Therefore, in the proportion configuration type 0, the subframe set includes the first uplink subframe set consisting of subframes 2, 3, and 4; the second uplink subframe set consisting of subframes 7, 8, and 9 because the macro base station After determining the subframe set to be used by each of the small base stations, the special subframe and/or the downlink subframe (ie, the interval time) between the two uplink subframe sets are used to perform handover between the macro base station and the small base station. .
  • the uplink subframe set is composed of subframes 2, 3, and 4. If the macro base station uses the uplink subframe set consisting of subframes 2, 3, and 4 of the current radio frame, the small base station corresponds to the uplink subframe set composed of subframes 2, 3, and 4 of the next radio frame.
  • the frame set is used as a first downlink feedback time slot corresponding to the macro base station and a second downlink feedback time slot corresponding to the small base station, where the first downlink feedback time slot and the second downlink feedback time slot are Interval by an interval;
  • the radio frame uplink resource corresponding to the uplink radio frequency chain is coordinated and allocated to the macro base station. And small base stations.
  • the different uplink subframe sets may be determined as the first downlink feedback time slot corresponding to the macro base station and the second downlink feedback time slot corresponding to the small base station.
  • the first instruction processing unit 204 is configured to generate a first control instruction according to the first downlink feedback time slot and the second downlink feedback time slot, and send the first control instruction to the small base station, where the first control The instruction is used by the small base station and the macro base station to receive uplink feedback of the UE in different uplink subframe sets.
  • the macro base station and the small base station are required to coordinately use the unique uplink of the UE, The frequency chain, so the macro base station and the small base station need to coordinate the uplink used by themselves. Therefore, after the macro base station determines the location of the available uplink subframe by using the above scheme, the small base station needs to determine which part of the uplink subframe is used by each of the small base stations. .
  • the specific implementation manner in which the macro base station and the small base station determine the uplink subframe used by each of the macro base stations and the small base station may be:
  • the UE since the UE has only one uplink radio frequency chain, but corresponds to two service base stations, two serving base stations are required to coordinate and use the one uplink radio frequency chain.
  • the specific implementation manner of coordinating the use of this uplink RF link between two base stations may be:
  • the Macro eNB sends a negotiation request to the Small eNB, where the negotiation request is used to indicate that an uplink radio frequency chain of the UE needs to be shared with the Small eNB;
  • the Macro eNB uniformly calculates how the Macro eNB and the Small eNB use the UE-uplink RF link, and notifies the Small eNB of the calculation result. After receiving the notification, the Small eNB directly receives the downlink feedback of the UE according to the indication of the Macro eNB.
  • the two serving cells required by the present invention may have only one uplink radio frequency chain.
  • the technical effect of the UE service so in the embodiment of the present invention, after determining the usage of the one uplink radio frequency chain by the macro base station and the small base station, the macro base station and the small base station coordinate the uplink radio frequency chain.
  • Mode 1 Since the macro base station and the small base station have their own HARQ RTT timers, the macro base station may send its own HARQ RTT timer to the small base station after determining its own HARQ RTT timer, and the small base station may according to the received macro base.
  • the HARQ RTT timer of the station determines its own HARQ RTT timer. Thereby two two base stations can coordinate one uplink radio frequency chain of the shared UE.
  • the first control instruction sent by the first instruction processing unit 204 includes a HARQ RTT timer of the macro base station, so that the small base station sets its own HARQ RTT timer after receiving the HARQ RTT timer of the macro base station.
  • the macro base station determines that the small base station uses the time value of the uplink radio frequency chain to transmit the time value of the small base station to the small base station, so that the small base station can according to the moment.
  • the value sets its own HARQ RTT timer.
  • Time Division Duplexing (TDD) mode work may also be a Frequency Division Duplexing (FDD) mode operation, when the base station works as an FDD mode.
  • FDD Frequency Division Duplexing
  • the UE needs to switch between different frequency points in order to interact with different base stations, so when the macro base station and the small base station work in FDD mode respectively, If the UE sends uplink feedback for two base stations, the RF RF chain needs to be moved from one frequency point to another (ie RF retiming), because RF retiming cannot be achieved immediately due to the limitation of the RF chain components.
  • the feedback time slot coordination unit 203 determines that the interval time is the time of the UE RF retiming.
  • the base station further includes:
  • a subframe number determining unit 205 configured to determine, according to the proportion configuration type, a downlink of the UE a location of the subframe set and a number of subframes in the downlink subframe set;
  • the second instruction processing unit 206 is configured to: when determining that the number of subframes included in each uplink subframe set is not less than 2, generate a second according to the downlink subframe set position and the number of subframes in the downlink subframe set Controlling the command, and sending the second control command to the UE and the small base station, where the second control instruction is used to instruct the small base station to send downlink data in a downlink subframe, and instruct the UE to use uplink
  • the RF receives the downlink data sent by the small base station at the location of the downlink subframe, and switches back to the uplink RF in the last subframe and the special subframe in the uplink subframe set.
  • a traditional non-CA UE can only be linked to the same site, and the two RFs work in the uplink and downlink respectively.
  • uplink RF is required.
  • the downlink RF works at the same time.
  • the uplink RF can be switched to the downlink RF that receives the downlink data, so that the two downlink RFs can be used to respectively correspond to the transmitted data of the receiving macro base station and the small base station.
  • the RF switches between uplink and downlink, it cannot work immediately on the new frequency point, and a certain switching time is required in the middle. Therefore, in order to ensure the uplink and downlink handover of the RF and the normal transmission of the uplink data, it is required to determine that the number of subframes included in the uplink subframe set is not less than 2. Because the uplink subframe set needs a part of resources for uplink data transmission, another part of resources is used to implement the switching time required for the uplink and downlink handover of the RF.
  • the idle RF is fully utilized, and when the dual-link network's Macro cell and Small cell are in TDD mode, The UE can obtain the gain in throughput of the dual link network.
  • the manner in which the control command is sent between the macro base station and the small base station may be multiple, and the optional manner may be:
  • the second instruction processing unit 206 is further configured to use the combination of one or more of a broadcast message, a radio resource control RRC signaling, a medium access control layer control unit MACCE, or a physical layer command, and the second Control instructions are sent to the UE and the small base station.
  • the base station provided by the embodiment of the present invention can determine the uplink in one or two consecutive radio frames. The subframe set, and then the multiple uplink subframe sets are reasonably allocated to the macro base station or the small base station, so that the macro base station and the small base station can provide services to the UE without conflict. Therefore, the solution provided by the present invention can enable a UE (only a single-transmission multi-reception and a single-received UE) with only one uplink radio frequency chain to enjoy the gain of the dual-link network.
  • the implementation of the solution of the present invention is performed by using the macro base station as the leading device.
  • the UE or the small base station may implement the solution implemented by the module provided by the embodiment.
  • Embodiment 2 is a diagrammatic representation of Embodiment 1:
  • the final coordination result needs to be sent to the user equipment UE.
  • the user equipment is configured to adjust the base station corresponding to the uplink subframe according to the coordination result determined by the macro base station. Therefore, based on the macro base station provided in the foregoing solution, the user equipment is further provided in the embodiment of the present invention, and the user equipment includes (as shown in FIG. 3 Show):
  • the receiving module 301 receives the first control command sent by the macro base station, and receives downlink data sent by the macro base station and the small base station;
  • the feedback time slot determining unit 302 is configured to determine, according to the first control instruction, a first downlink feedback time slot and a second downlink feedback time slot corresponding to the macro base station and the small base station;
  • the user equipment After the macro base station determines the uplink subframe set corresponding to itself and the small base station, the user equipment needs to use different uplink subframes as downlink feedback slots for different base stations according to the coordinated result of the macro base station.
  • the sending module 303 is configured to feed back feedback information of the downlink data to the macro base station and the small base station, respectively, by using the first downlink feedback time slot and the second downlink feedback time slot.
  • the user equipment Because the user equipment receives the downlink data sent by the two base stations, the user equipment needs to feed back the feedback information corresponding to the downlink data in different uplink subframe sets.
  • the instruction may be a first uplink subframe set (composed of subframes 2, 3, and 4) as a first downlink feedback slot for the macro base station; a second uplink subframe set (by subframes 7, 8) And 9 constitute) as a second downlink feedback slot for the small base station.
  • the UE is different.
  • the base station interaction needs to be switched between different frequency points. Therefore, when the macro base station and the small base station work in the FDD mode, if the UE sends uplink feedback for two base stations, the RF link chain needs to be moved from one frequency point to Another frequency point (RF retiming), because RF retiming occurs due to the limitations of the RF chain components, can not be immediately working on the new frequency point, there will be a certain switching time in the middle. Therefore, when the macro base station and the small base station work in the FDD mode, the sending module 303 further performs RF retuning at intervals between the first downlink feedback slot and the second downlink feedback slot. RF retiming.
  • the two RFs work in the uplink and downlink respectively.
  • the uplink RF and the downlink RF need to work simultaneously.
  • the downlink RF when the uplink RF works, the downlink RF is idle.
  • the uplink RF is idle.
  • the idle RF can be enabled under the TDD network.
  • the user equipment In the case of idle RF activation, the user equipment can be regarded as a device with two downlink RFs, so that two The RF receives the downlink data sent by the macro base station and the small base station, respectively. Therefore, under the TDD network, when the user equipment has only one downlink RF chain, Bell' J:
  • the receiving module 301 is further configured to: after receiving the second control instruction, use the uplink RF to receive downlink data sent by the small base station in a downlink subframe according to the second control instruction, and in the uplink The last subframe or special subframe of the subframe set is switched back to the upstream RF.
  • the user equipment UE uses different radio frequency chain resources to make the unique uplink RF chain different.
  • the base stations are switched, so that the feedback information of the data transmitted by the macro base station and the small base station can be fed back to the macro base station and the small base station.
  • the RF originally used for the uplink can be switched to the downlink, thereby being used for the original
  • the two RFs receiving the uplink and the downlink respectively are used to receive the downlink data of the macro base station and the small base station, thereby achieving the gain of the double link network.
  • Embodiment 3 is a diagrammatic representation of Embodiment 3
  • the embodiment of the present invention further provides a single radio frequency UE radio resource allocation method, where the macro base station and the small base station are serving base stations of a user equipment UE having only one uplink radio frequency chain RF, and the macro base The station and the small base station operate at different frequencies, and the method includes:
  • Step 401 The macro base station determines a proportion configuration type of the uplink and downlink resources of the UE.
  • Step 402 The macro base station determines, according to the determined proportion configuration type, a special sub-set between any two adjacent uplink subframe sets in the radio frame. And determining, according to the number of the special subframes and the downlink subframes, an interval time between the set of any two adjacent uplink subframes, where the uplink subframe set is one And an uplink subframe or a plurality of consecutive uplink subframes, where the first downlink feedback slot corresponding to the macro base station and the second downlink feedback slot corresponding to the small base station, where the first downlink feedback slot Interval with the second downlink feedback time slot;
  • Step 404 The macro base station generates a first control instruction according to the first downlink feedback time slot and the second downlink feedback time slot, and sends the first control instruction to the small base station, where the first control instruction is used by The small base station and the macro base station receive uplink feedback of the UE in different uplink subframe sets.
  • the UE uses different frequency points because the frequency points used by the macro base station and the small base station are different.
  • the base station interaction needs to be switched between different frequency points. Therefore, the time taken by the RF retiming is separated between the subframe sets in the uplink RF chain of the UE occupied by the macro base station and the small base station. So the method also includes:
  • the macro base station determines that the interval time is a time for RF retuning RF retiming.
  • the method includes:
  • the macro base station determines that the number of subframes included in each uplink subframe set is greater than 2, generates a second control instruction according to the downlink subframe set position and the number of subframes in the downlink subframe set, and The second control instruction is sent to the UE and the small base station, where the second control instruction is used to instruct the small base station to send downlink data in the uplink subframe set; and instruct the UE to use uplink RF in The location of the uplink subframe set receives the downlink data sent by the small base station, and switches back to the uplink RF in the last subframe of the uplink subframe set.
  • the manner in which the control command is sent between the macro base station and the small base station may be multiple, and the optional manner may be:
  • the macro base station sends the control instruction (the control instruction includes a first control instruction and a second control instruction) by using any one or a combination of a broadcast message, an RRC signaling, a MACCE, or a physical layer command. Giving the UE and the small base station.
  • the two serving cells required by the present invention may have only one uplink radio frequency chain.
  • the technical effect of the UE service so in the embodiment of the present invention, after determining the usage of the one uplink radio frequency chain by the macro base station and the small base station, the macro base station and the small base station coordinate the uplink radio frequency chain.
  • the manner of using the method includes: the first control instruction includes a HARQ RTT timer of the macro base station, so that the small base station sets its own HARQ RTT after receiving the HARQ RTT timer of the macro base station. Timer.
  • the final coordination result needs to be sent to the user equipment UE.
  • the user equipment UE is configured to adjust the base station corresponding to the uplink subframe according to the coordination result determined by the macro base station. Therefore, based on the method provided in the third embodiment, the method for the single radio frequency is also provided in the embodiment of the present invention, where the method includes: As shown in Figure 5):
  • Step 501 The user equipment receives a first control command sent by a macro base station, and receives downlink data sent by the macro base station and the small base station.
  • Step 502 The user equipment determines, according to the first control instruction, a first downlink feedback time slot and a second downlink feedback time slot corresponding to the macro base station and the small base station;
  • Step 503 The user equipment feeds back feedback information of the downlink data to the macro base station and the small base station by using the first downlink feedback time slot and the second downlink feedback time slot, respectively.
  • the user equipment Because the user equipment receives the downlink data sent by the two base stations, the user equipment needs to feed back the feedback information corresponding to the downlink data in different uplink subframe sets.
  • the user equipment may use the first uplink subframe set (composed of subframes 2, 3, and 4) as the first target for the macro base station according to the first control instruction.
  • the second uplink subframe set (composed of subframes 7, 8, and 9) is used as the second downlink feedback slot for the small base station.
  • the macro base station and the small base station can work in the TDD mode or the FDD mode
  • the base station works in the FDD mode
  • the frequency points used by the macro base station and the small base station are different, the UE is different.
  • the base station interaction needs to be switched between different frequency points. Therefore, when the macro base station and the small base station work in the FDD mode, if the UE sends uplink feedback for two base stations, the RF link chain needs to be moved from one frequency point to Another frequency point (RF retiming), because RF retiming occurs due to the limitations of the RF chain components, can not be immediately working on the new frequency point, there will be a certain switching time in the middle.
  • RF retiming Another frequency point
  • the method further includes: The user equipment performs RF retiming RF retiming at intervals between the first downlink feedback slot and the second downlink feedback slot.
  • the two RFs work in the uplink and downlink respectively.
  • the uplink RF and the downlink RF need to work simultaneously.
  • the downlink RF when the uplink RF works, the downlink RF is idle.
  • the uplink RF is idle.
  • the idle RF can be enabled under the TDD network.
  • the user equipment can be regarded as a device with two downlink RFs, so that two The RF receives the downlink data sent by the macro base station and the small base station, respectively. Therefore, in the TDD network, when the user equipment has only one downlink radio frequency chain, the method further includes:
  • the user equipment UE uses different radio frequency chain resources to make the unique uplink RF chain different.
  • the base stations are switched, so that the feedback information of the data transmitted by the macro base station and the small base station can be fed back to the macro base station and the small base station.
  • the RF originally used for the uplink can be switched to the downlink, thereby being used for the original
  • the two RFs receiving the uplink and the downlink respectively are used to receive the downlink data of the macro base station and the small base station, thereby achieving the gain of the double link network.
  • the method provided by the embodiment of the present invention is further described below by using the uplink and downlink configuration in the LTE TDD system provided in Table 1, specifically:
  • Specific implementation package of the method provided by the embodiment of the invention Includes:
  • the macro cell and the small cell respectively transmit downlink data in the TDD configuration at the frequency of the respective working, and the UE can normally receive the data of the two base stations through the two downlink RFs. Then, since the UE has only one uplink RF radio chain, the downlink data is simultaneously Upon arrival, the UE cannot simultaneously feed back the Macro cell and the Small cell according to the timing of the traditional HARQ RTT timer, so the specific implementation needs to be:
  • the uplink RF resource of the UE is allocated to the Macro cell or the Small cell according to the time.
  • one radio frame including 10 subframes has two uplink subframe sets, and the first subframe set includes the subframe 2 3; The second subframe set includes subframes 7, 8. Therefore, in this example, the macro base station and the small base station can coordinate the use of the two subframe sets, so in an embodiment, after the macro base station determines the time interval between the first subframe set and the second subframe set, The time interval determines the HARQ RTT timer of itself and the small base station.
  • the specific implementation of the macro base station and the small base station using one radio frame may be:
  • the uplink RF of the UE works at the frequency of the small cell, and is used for feeding back the ACK/NACK of the downlink data of the small cell.
  • the uplink RF of the UE works at the frequency of the Macro cell, and is used to feed back the ACK/NACK of the downlink data of the Macro cell.
  • the UE's RF needs to be converted to the frequency at which the Macro cell is located, that is, RF Retiming.
  • the second case Macro eNB and Small eNB work in FDD mode respectively; UE has two downlink RFs and one uplink RF; Macro eNB and Small eNB work at different frequencies.
  • the network eNB and the Small eNB negotiate the UE RF Retiming time when the Macro eNB and the Small eNB work in the FDD mode, the network needs to send the UE time for the RF Retiming.
  • the Macro eNB and the Small eNB work in the FDD mode, respectively, there is no need to consider the downlink for the uplink RF chain.
  • the subframe occupied by the data only needs to determine the time of RF Retiming that occurs when the uplink RF link is switched to a different base station. As shown in FIG.
  • the first row indicates the downlink of the Macro eNB; the second row is the downlink of the Small eNB; and the third row is the allocation of the UE uplink, so in this embodiment, the UE uplink between the first subframe set (N, N+1, N+2, N+3) of one radio frame and the second subframe set (N+5, N+6, N+7, N+8)
  • the sub-frame (N+4) is used to implement RF Retiming. Therefore, if the first subframe set UE performs downlink feedback of the macro base station, the second subframe set performs downlink feedback of the small base station.
  • the third case the Macro eNB and the Small eNB work in the TDD mode; the UE has one downlink RF and one uplink RF; the Macro eNB and the Small eNB work on different frequencies; and the UE uses the uplink and downlink configuration type 1;
  • the specific implementation of the method provided by the embodiment of the present invention includes:
  • the two RFs work in the uplink and downlink respectively.
  • the uplink RF and the downlink RF need to work simultaneously.
  • the downlink RF is idle.
  • the uplink RF is idle.
  • the gain of the dual-link network can be obtained by using the uplink and downlink radio frequency chain of the UE by using the method provided by the embodiment of the present invention.
  • the specific implementation can be:
  • the Macro cell and the Small cell send downlink data in the TDD configuration at the respective working frequency points.
  • the downlink RF of the UE receives data from the macro cell, and the uplink RF operation of the UE is also used to receive data and receive downlink data from the small cell.
  • the downlink RF of the UE is subjected to RF retiming to work at the uplink frequency point where the Macro is located.
  • the downlink RF of the UE receives the downlink data of the Macro cell at 0; 2;
  • the downlink RF of the subframe 3 UE becomes the uplink mode, which is used for feeding back downlink data and transmitting uplink traffic.
  • the uplink RF of the UE is used to receive the downlink data of the Small cell in the subframes of 0; 1; 4; 5; 6; 9; for the uplink of the UE of the subframe 8; RF is used to feed back and transmit upstream services.
  • Another problem is the hardware uplink and downlink conversion operation (identified as RF retiming in the figure).
  • RF retiming the hardware uplink and downlink conversion operation
  • the downlink RF of the UE is working on the 0; 1 subframe, the 2; 3 subframe needs to work in the uplink mode, because The operation of the RF from downlink to uplink may require hardware operation (like RF retiming), and the network side needs to configure the conversion operation.
  • the embodiment of the present invention when the macro base station and the small base station working at different frequencies simultaneously provide services for the UE, the embodiment of the present invention
  • the provided base station is capable of determining one or a set of uplink subframes in two consecutive radio frames, and then appropriately allocating a plurality of uplink subframe sets to the macro base station or the small base station, thereby enabling the macro base station and the small base station to Providing services to the UE without conflict. Therefore, the solution provided by the present invention can make the UE (including single-transmit multiple reception and single-single-received UE) provided with only one uplink radio frequency chain enjoy the gain of the double-link network.
  • the disclosed system, apparatus, and method may be implemented in other manners.
  • the device embodiments described above are merely illustrative.
  • the division of the modules or units is only a logical function division.
  • there may be another division manner for example, multiple units or components may be used. Combined or can be integrated into another system, or some features can be ignored, or not executed.
  • the mutual coupling or direct coupling or communication connection shown or discussed may be an indirect connection or communication connection through some interface, device or unit, and may be in an electrical, mechanical or other form.
  • the components displayed for the unit may or may not be physical units, ie may be located in one place, or may be distributed over multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of the embodiment.
  • each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.
  • the above integrated unit can be implemented in the form of hardware or in the form of a software function unit.
  • the integrated unit if implemented in the form of a software functional unit and sold or used as a standalone product, may be stored in a computer readable storage medium.
  • the instructions include a plurality of instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) or a processor to perform all or part of the steps of the methods described in various embodiments of the present application.
  • the foregoing storage medium includes: a U disk, a removable hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk, and the like, which can store program codes. .

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

Abstract

La présente invention concerne une méthode et un dispositif d'attribution de ressources de radiofréquence pour un UE à radiofréquence unique. Un macro-eNB et un petit eNB sont des eNB de service pour un équipement utilisateur (UE) ayant une seule liaison montante en radiofréquence (RF), et le macro-eNB et le petit eNB fonctionnent à différentes fréquences. La méthode comprend les étapes suivantes : déterminer, par le macro-eNB, le type d'attribution proportionnelle des ressources de liaison montante et de liaison descendante de l'UE ; déterminer, par le macro-eNB, les intervalles de deux ensembles de sous-trames de liaison montante voisins quelconques dans une trame sans fil selon le type déterminé de l'attribution proportionnelle ; selon les intervalles, déterminer un ensemble de sous-trames de liaison montante à partir de la trame sans fil en tant que premier créneau temporel de rétroaction de liaison descendante correspondant au macro-eNB et deuxième créneau temporal de rétroaction de liaison descendante correspondant au petit eNB ; et recevoir, par le petit eNB et le macro-eNB, la rétroaction de liaison montante de l'UE sur différents ensembles de sous-trames de liaison montante. Par conséquent, avec la solution de la présente invention, l'UE doté d'une seule liaison montante en radiofréquence peut profiter de l'avantage de réseaux à liaisons doubles.
PCT/CN2014/073982 2014-03-24 2014-03-24 Méthode et dispositif d'attribution de ressources de radiofréquence pour ue à radiofréquence unique Ceased WO2015143614A1 (fr)

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CN201480001167.8A CN105165093B (zh) 2014-03-24 2014-03-24 一种单射频ue射频资源分配方法及装置
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