WO2011020215A1 - 避免mbsfn子帧外自干扰的方法、中继节点和用户设备 - Google Patents

避免mbsfn子帧外自干扰的方法、中继节点和用户设备 Download PDF

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Publication number
WO2011020215A1
WO2011020215A1 PCT/CN2009/000946 CN2009000946W WO2011020215A1 WO 2011020215 A1 WO2011020215 A1 WO 2011020215A1 CN 2009000946 W CN2009000946 W CN 2009000946W WO 2011020215 A1 WO2011020215 A1 WO 2011020215A1
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WIPO (PCT)
Prior art keywords
user equipment
harq
relay node
time period
mbsfn subframe
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PCT/CN2009/000946
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English (en)
French (fr)
Inventor
杨涛
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上海贝尔股份有限公司
阿尔卡特朗讯
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.)
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Application filed by 上海贝尔股份有限公司, 阿尔卡特朗讯 filed Critical 上海贝尔股份有限公司
Priority to CN200980160591.6A priority Critical patent/CN102474848B/zh
Priority to PCT/CN2009/000946 priority patent/WO2011020215A1/zh
Publication of WO2011020215A1 publication Critical patent/WO2011020215A1/zh

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Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00Arrangements for detecting or preventing errors in the information received
    • H04L1/12Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18Automatic repetition systems, e.g. Van Duuren systems
    • H04L1/1822Automatic repetition systems, e.g. Van Duuren systems involving configuration of automatic repeat request [ARQ] with parallel processes
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00Arrangements for detecting or preventing errors in the information received
    • H04L1/12Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18Automatic repetition systems, e.g. Van Duuren systems
    • H04L1/1867Arrangements specially adapted for the transmitter end
    • H04L1/1887Scheduling and prioritising arrangements
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W72/00Local resource management
    • H04W72/04Wireless resource allocation
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W72/00Local resource management
    • H04W72/30Resource management for broadcast services
    • 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

  • Embodiments of the present invention relate to a method, a relay node, and a user equipment for avoiding sub-frame self-interference of MBSFN (Mulcast Broadcasting Si ngl e Frequency Network). Background technique
  • the relay concept is used as a primary alternative to improve the performance of LTE-evolved systems.
  • An important issue with relay operation is to avoid self-interference at the relay node due to dual transmission between the relay node and the base station eNB and the relay node and the user equipment UE.
  • MBSFN subframes are allowed to perform backward compatible relay operations.
  • the first or first two symbols are reserved for controlling the transmission of information from the relay node to the UE according to the definition of the MBSFN subframe, and the transmission of the base station to the relay node is performed on subsequent symbols.
  • the third symbol is used as an interval for separating the receiving of the relay node.
  • the Rx and the transmitting Tx operations do not overlap in the time domain, so that self-interference on the subframe can be avoided.
  • the hybrid automatic retransmission request HARQ (Hybrid Automat i c Repeat reQuest) schedule defined by LTE should be maintained in the LTE evolved system. Therefore, HARQ feedback for transmitting the downlink DL will occur 1 ⁇ 2 s after the MBSFN subframe. Therefore, in this subframe, the UL transmission from the UE to the relay node should also be prohibited to avoid self-interference.
  • HARQ Hybrid Automat i c Repeat reQuest
  • Figure 6 shows a potential self-interference outside the MBSFN subframe of the relay station.
  • the relay station will transmit HARQ feedback information to the base station eNB after 4 ms.
  • the relay station receives the HARQ result from the base station and receives the uplink transmission from the user equipment, thus generating self-interference, which must be avoided.
  • the prior art has proposed a method of relying on a scheduler to terminate uplink transmissions of user equipment on a subframe with potential self-interference to solve this problem, for example, by having a zero resource allocation scheduling command.
  • this method does not explicitly describe when to send a zero resource allocation scheduling command to the user equipment.
  • the zero resource allocation command is not defined. Therefore, when the terminal user of the LTE receives the zero resource allocation scheduling command, the JK constant operation cannot be performed, that is, the zero resource allocation scheduling command will affect the user operation in the 3GPP R8 protocol. This means: The zero resource allocation scheduling scheme will not support backward compatibility, so it is not feasible to rely on zero resource allocation scheduling commands to solve this problem. Summary of the invention
  • the object of the present invention is a method, a relay node and a device for avoiding sub-frame self-interference of a BSFN (Mult Icast Broadcast Si ngle Frequency Network).
  • a relay node is proposed for avoiding potential self-interference outside a MBSFN subframe of a multicast broadcast single frequency network, the relay node comprising: a first receiving device, configured to receive from a second receiving device, configured to receive MBSFN subframe configuration information from the base station, and a feedback sending device, configured to send HARQ feedback to the base station in the subframe after the MBSFN subframe; and And a sending apparatus, configured to send a hybrid automatic repeat request response HARQ ACK to the user equipment, and send the PDCCH to the user equipment after the first time period, in a first time period before the subframe including the HARQ feedback; After the second time period in which the response transmitting apparatus transmits the PDCCH to resume the suspended HARQ process, the first receiving
  • the response sending apparatus sends the hybrid automatic weight to the user equipment in a third time period before the MBSFN subframe.
  • the request is answered with a HARQ ACK.
  • the third period of time is 8 m S .
  • the response transmitting device transmits the HARQ response to the user equipment regardless of the decoding result.
  • the first time period and the second time period are both 1 ⁇ 2 s.
  • a user equipment including: a HARQ ACK receiving apparatus, configured to receive a HARQ ACK and a PDCCH; and a delay control apparatus, configured to maintain in a Q buffer when receiving a HARQ ACK An uplink HARQ process, and delaying an uplink HARQ process associated with the MBSFN subframe to a second time period after receiving the PDCCH; and a retransmission device, after the second time period, restarting Delayed uplink HARQ process.
  • the retransmission device restarts the delayed uplink HARQ process by using a physical downlink control channel PDCCH.
  • the second period of time is 4 rns.
  • the self-interference method includes the following steps: configuring a downlink transmission from a base station to a relay node as an MBSFN subframe; the relay node feeding back HARQ feedback in a subframe subsequent to the MBSFN subframe; and including the HARQ feedback.
  • the first time period before the subframe the hybrid automatic repeat request response HARQ ACK is sent to the user equipment, and the PDCCH is sent to the user equipment after the first time period; from receiving the HARQ ACK, the user equipment remains in the HARQ buffer
  • the relay node when the downlink transmission from the base station to the relay node is configured as an MBSFN subframe, the relay node sends a hybrid automatic repeat request response HARQ ACK to the user equipment in a third time period before the MBSFN subframe.
  • the third time period is 8 ms.
  • the relay node sends the hybrid automatic repeat request response HARQ ACK to the user equipment, regardless of the decoding result.
  • the relay node restarts the delayed uplink HARQ process using the physical downlink control channel PDCCH.
  • a communication system comprising a relay node, a base station, and a user equipment,
  • the relay node includes: a first receiving device, configured to receive a HARQ UL transmission from a user equipment; a second receiving device, configured to receive MBSFN subframe configuration information; and a feedback sending device, configured to be after the MBSFN subframe Sending HARQ feedback to the base station in the subframe; and answering the transmitting means, 'for transmitting the hybrid automatic repeat request response HARQ ACK to the user equipment in the first time period before the subframe including the HARQ feedback, and in the Sending a PDCCH to the user equipment after a period of time; wherein the first receiving apparatus receives the restarted uplink IIARQ from the user equipment after transmitting the PDCCH to resume the second period of the suspended HARQ process;
  • the user equipment including: a HARQ ACK receiving apparatus, configured to receive a HARQ ACK and a PDCCH; and a delay control apparatus, configured to maintain an uplink HARQ process in the HARQ buffer when the HARQ ACK is received, and The MBSFN subframe related uplink HARQ process is delayed to a second time period after receiving the PDCCH; and the retransmission device is configured to restart the delayed uplink HARQ process after the second time period.
  • the first time period and the second time period are both 1 ⁇ 2S.
  • FIG. 1 shows a schematic diagram of a 3GPP Long Term Evolution (LTE) communication system according to an embodiment of the present invention.
  • LTE Long Term Evolution
  • FIG. 2 shows a schematic diagram of avoiding a potential self-interference method outside of an MBSFN subframe, in accordance with one embodiment of the present invention
  • FIG. 3 illustrates a flow diagram of a method of avoiding potential self-interference outside of an MBSFN subframe, in accordance with one embodiment of the present invention
  • FIG. 4 illustrates another schematic diagram of a method of avoiding potential self-interference outside of an MBSFN subframe, in accordance with an embodiment of the present invention
  • FIG. 5 is a flow chart showing a method for avoiding potential self-interference outside an MBSFN subframe according to an embodiment of the present invention
  • Figure 6 shows a schematic diagram of potential self-interference outside the MBSFN subframe of a relay station in accordance with the prior art.
  • FIG. Fig. 1 schematically shows an LTE communication system 200 comprising a user equipment UE201, a relay node 202 and a base station eNB 203.
  • the schematic Figure 1 that needs to be pointed out omits the conventional structure or construction to avoid causing it. The understanding of the invention is not clear.
  • the dotted arrows in Figure 1 indicate the radio communication between the various devices.
  • the user equipment 201 includes: a HARQ ACK receiving apparatus 201 1 for receiving a HARQ ACK and a PDCCH; and a delay control apparatus 2012, configured to buffer the HARQ ACK when receiving the HARQ ACK Maintaining an uplink HARQ process, and delaying the uplink HARQ process associated with the MBSFN subframe to a second time period after receiving the PDCCH (eg, 1 ⁇ 2 s); HARQ buffer 2013, for buffering is delayed And a retransmission device 2014, for the second time period, restarting the deferred uplink HARQ process.
  • a HARQ ACK receiving apparatus 201 1 for receiving a HARQ ACK and a PDCCH
  • a delay control apparatus 2012 configured to buffer the HARQ ACK when receiving the HARQ ACK Maintaining an uplink HARQ process, and delaying the uplink HARQ process associated with the MBSFN subframe to a second time period after receiving the PDCCH (eg, 1 ⁇ 2 s);
  • the relay node 202 includes: a first receiving device 2021, configured to receive a HARQ UL transmission from a user equipment; a second receiving device 20.22, configured to receive MBSFN subframe configuration information; and a feedback transmitting device 2023, configured to: in the MBSFN sub Sending HARQ feedback to the base station in the subframe after the frame; the response transmitting device 2024, configured to send the hybrid automatic repeat request response HARQ to the user equipment in a first time period (eg, 1 ⁇ 2 s) before the subframe including the HARQ feedback And an HARQ UL buffer transmitting device 2025, configured to buffer the HARQ UL transmission received by the first receiving device of the relay node, and then sent to the base station; wherein the ACK transmitting device 2024 transmits the PDCCH to resume the delayed HARQ process.
  • the first receiving device 2021 receives the re-started uplink HARQ from the user equipment.
  • the base station 203 includes: HARQ feedback receiving means 2031 for receiving HARQ feedback sent by the relay node 202; configuration information transmitting means 2032, transmitting the configuration message to the relay node; and configuring means 2033 for downlinking from the base station to the relay node
  • the transmission is configured as an MBSFN subframe, and an MBSFN subframe configuration message is generated; and the UL transmission receiving device 2034 is configured to receive uplink data from the relay node.
  • the response sending device 2024 sends the hybrid to the user equipment in a third time period (for example, 8 ms) before the MBSFN subframe.
  • a third time period for example, 8 ms
  • the response transmitting device 2024 can transmit the HARQ response to the user equipment 201 regardless of the decoding result.
  • the retransmission device 2014 restarts the delayed uplink using the physical downlink control channel PDCCH. HARQ process.
  • the uplink HARQ process is maintained in the HARQ buffer by the delay control apparatus 2012. And delaying the uplink HARQ process associated with the MBSFN subframe to a second time period (eg, 4 ms) after receiving the PDCCH. At this time, there is no UL transmission for the HARQ process, and there is HARQ feedback from the relay node to the base station, thereby avoiding potential self-interference.
  • a second time period eg, 4 ms
  • the hybrid automatic repeat request response HARQ ACK is sent to the user equipment by the response transmitting device 2024 for the first time period (for example, 1 ⁇ 2 S ) before the subframe including the HARQ feedback, and is sent After the second time period (for example, 4ms) of the HARQ ACK, the re-started uplink HARQ is received from the user equipment by the first receiving device 2021, and the feedback is sent between the two time periods.
  • the 2023 sends HARQ feedback to the base station in the subframe after the MBSFN subframe, avoiding potential self-interference with the UL transmission of the user equipment.
  • the HARQ feedback receiving device 2031 in the base station receives the HARQ feedback sent by the relay node 202, configures the downlink transmission of the base station to the relay node as the MBSFN subframe by the configuration device 2033, and generates an MBSFN subframe configuration message,
  • the configuration message is transmitted to the relay node by the configuration information transmitting device 20332; the relay node receives the MBSFN subframe configuration information from the base station through the second receiving device, and the feedback transmitting device 2023 is configured according to the MBSFN subframe configuration information.
  • the response transmitting device 2024 sends the hybrid automatic repeat request response HARQ AC to the user equipment in a first time period before the subframe including the HARQ feedback, Or transmitting a hybrid automatic repeat request to the user equipment in the third time period before the MBSFN subframe, and the user equipment receives the HARQ response sent by the response sending device 2024 of the relay node by using the HARQ ACK receiving device 2011,
  • the delay control device 2012 maintains an uplink HARQ process in the HARQ buffer, and will The MBSFN subframe related uplink HARQ process is delayed to a second time period (eg, 4 ms) after receiving the PDCCH.
  • each of the components shown in FIG. 1 can be implemented by multiple devices in practical applications, showing many Components can also be integrated in a single chip or a device in practical applications.
  • the MBSFN subframe is the nth subframe for downlink (DL) transmission from the base station to the relay node. Then, the HARQ feedback from the relay node to the base station will appear at the (n+4)th subframe.
  • the uplink (UL) synchronous HARQ scheme if the UL transmission from the user equipment to the base station occurs at the (n_4)th subframe, the UL link from the relay node to the base station and the access UL from the user equipment to the base station There is a potential conflict between the links.
  • the UL transmission of the end user equipment at the ( ⁇ -4)th subframe should be delayed to avoid potential retransmission at the (n+4)th subframe, thereby avoiding potential interference.
  • how to achieve this goal without affecting the current state of the user equipment e.g., maintaining the associated HARQ buffer) is an issue.
  • the relay node Based on such user equipment operation, if the relay node transmits a HARQ ACK downward to the user equipment at the (n-8)th subframe regardless of the decoding result, the user equipment should maintain its HARQ buffer, and at the ( ⁇ - 4) subframes are delayed in UL transmission, so potential retransmission will not occur at (n+4), thus avoiding the possibility of relay node-to-base station UL transmission and UL transmission from user equipment to base station The interference that exists.
  • a relay node should transmit a HARQ ACK 8 ms before the MBSFN subframe to avoid potential self-interference occurring after 4 ms of the MBSFN subframe.
  • Fig. 2 shows a schematic diagram of a method for solving potential self-interference according to a first embodiment of the present invention.
  • the relay node when the relay node is configured for the MBSFN of the downlink transmission from the base station to the relay node, the relay node generates a HARQ ACK 8 ms before the MBSFN subframe regardless of the success or failure of the decoding result. Then, the user equipment delays the UL transmission associated with the MBSFN subframe by 1 ⁇ 2 s, so UL transmission does not occur after 1 ⁇ 2 s after the MBSFN subframe. Obviously this will not affect the operation of LTE users. Thereafter, the relay node should restart the deferred UL HARQ process using the Physical Downlink Control Channel (PDCCH).
  • PDCCH Physical Downlink Control Channel
  • the subframe is configured as an MBSFN subframe.
  • the relay node transmits a HARQ ACK unrelated to the decoding result to the end user equipment, so the end user equipment will not perform the relay in the (n-4)th subframe.
  • Uplink transmission of the node Therefore, in the ⁇ th subframe, even if the end user equipment does not receive any information, the terminal user equipment does not perform uplink transmission in the (n+4)th subframe, and thus no self-interference is generated in the relay node.
  • FIG. 3 shows a flow diagram of a method of avoiding potential self-interference of MBSFN subframes in accordance with an embodiment of the present invention. The method of avoiding potential self-interference outside the MBSFN subframe will be described below with reference to FIGS. 2 and 3.
  • the downlink transmission from the base station to the relay node is configured as an MBSFN subframe by the configuration means 2023 of the base station (S301).
  • the relay node transmits a hybrid automatic repeat request response HARQ ACK to the user equipment by the response transmitting means 2024 during the third time period preceding the MBSFN subframe (S302).
  • the user equipment Starting from receiving the HARQ ACK, the user equipment maintains the uplink HARQ process in the HARQ buffer by the delay control device 2012, and delays the uplink HARQ process related to the MBSFN subframe to the second time after receiving the PDCCH. Segment (S303).
  • the user equipment restarts the delayed uplink map process by using the retransmission device 2014 (S304).
  • the relay node may send the hybrid automatic repeat request response HARQ ACK to the user equipment by using the response sending device 2024 to the user equipment regardless of the decoding result.
  • the relay node may also restart the delayed uplink HARQ process using the physical downlink control channel PDCCH.
  • the first time period and the second time period are both 1 ⁇ 2s, and the third time period is 8ms.
  • the relay node sends an ACK unrelated to the decoding to the user, which is located in the MBSFN configuration, that is, the ACK is transmitted in the first 8 ms of the MBSFN subframe.
  • the basis is that the relay sends HARQ feedback to the base station 4 ms after the MBSFN subframe.
  • the embodiments of the present invention can also be applied to other scenarios: that is, the relay node does not feed back HARQ feedback to the base station after 4 ms of the MBSFN subframe, but feeds back HARQ feedback in a certain subframe after the MBSFN subframe.
  • the relay node sends a HARQ feedback to the base station in another subframe after the MBSFN 1 ⁇ 2s, the relay node sends the HARQ feedback subframe to the base station as the base point, and sends an ACK to the user 4 ms before the base point.
  • Fig. 4 shows a schematic diagram of a method for solving potential self-interference according to a second embodiment of the present invention.
  • the downlink transmission from the base station to the relay node is configured as an MBSFN subframe; the subframe in which the relay node is behind the MBSFN subframe (in the embodiment of the present invention, (i + 1) wireless
  • the feedback of the HARQ feedback in the 4th subframe of the frame; the first time period before the subframe containing the HARQ feedback (4 ms, in the embodiment of the present invention, the 0th sub of the (i + 1) radio frames Frame), here is to send a hybrid automatic repeat request response HARQ ACK to the user equipment; the user equipment maintains an uplink HARQ process in the HARQ buffer, and delays the uplink HARQ process associated with the MBSFN subframe Two time periods (1 ⁇ 2s); after the second time period, the relay node restarts the delayed uplink HARQ process.
  • FIG. 5 is a flow chart showing a method of avoiding potential self-interference of MBSFN subframes according to a second embodiment of the present invention. The method for avoiding potential self-interference outside the MBSFN subframe of the multicast broadcast single frequency network will be described below with reference to FIG. 2 and FIG. 5.
  • the downlink transmission from the base station to the relay node is configured as an MBSFN subframe by the configuration device 2033 in the base station 203 (S50l).
  • the relay node feeds back HARQ feedback in the subframe after the MBSFN subframe by the feedback transmitting means 2023 (S502). It can be understood here that the subframe after the MBSFN subframe is not limited to the immediately adjacent MBSFN subframe as long as it is located after the MBSFN subframe.
  • the relay node transmits a hybrid automatic repeat request response HARQ ACK to the user equipment through the response transmitting device 2024 in the first time period (4 ms) before the subframe including the HARQ feedback (S503).
  • the relay node After the relay node sends the HARQ ACK to the user equipment, its uplink HARQ after 4ms is delayed, and then the relay node sends the PDCCH to recover the delayed HARQ after 4ms of the suspended subframe, after 1 ⁇ 2s of the PDCCH transmission.
  • the delayed HARQ process is re-received in the subframe. Therefore, the user equipment maintains the uplink HARQ process in the HARQ buffer by the delay control device 2012, and delays the uplink HARQ process associated with the MBSFN subframe to the second time period (1 ⁇ 2s) after receiving the PDCCH ( S504) o
  • the relay node After the second time period (4ms), the relay node notifies the user equipment to restart the delayed uplink HARQ process using the retransmission device (S505). Specifically, the relay node may notify the user equipment to restart the delayed uplink HARQ process through the PDCCH channel.
  • the first receiving device in the relay node can continue to receive the HARQ UL transmission from the user equipment, and then perform a normal buffering or forwarding operation through the HARQ UL buffer transmitting device 2025 in the relay node, at the relay node. Perform regular uplink transmissions with the base station.
  • potential self-interference occurring after MBSFN subframes can be resolved without any new functionality for LTE user equipment. This makes the relay operation backward compatible.
  • some embodiments also include a machine readable or computer readable program storage device (eg, a digital data storage medium) and encoding machine executable or computer executable program instructions, wherein the instructions perform some of the above methods or All steps.
  • the program storage device can be a digital memory, a magnetic storage medium (such as a magnetic disk and magnetic tape), a hardware or an optically readable digital data storage medium.
  • Embodiments also include a programming computer that performs the steps of the above method.

Description

避免 MBSFN子帧外自干扰的方法、 中继节点和用户设备 技术领域
本发明的实施方式涉及一种避免 MBSFN ( Mu l t i cast Broadcast Si ngl e Frequency Network ) 的子帧外自干扰的方法、 中继节点和用户设备。 背景技术
中继概念作为一种主要的备选方案, 用于改善 LET演进系统的性能。 中继操作 的一个重要问题在于避免在中继节点处由于中继节点与基站 eNB以及中继节点和用 户设备 UE之间的双重传输而导致的自干扰。为了解决这种问题, 允许 MBSFN子帧进 行后向兼容的中继操作。 根据 MBSFN子帧的定义, 将第一个或前两个符号保留用于 控制从中继节点到 UE 的信息传输, 在随后的符号上执行所述基站到中继节点的传 输。 将第 3个符号作为间隔用于分离中继节点的接收 Rx和发射 Tx操作不在时域上 重叠, 使得可以避免该子帧上的自干扰。 此外, 为了后向兼容, LTE 演进系统中应 该保持 LTE定义的混合自动重传请求 HARQ ( Hybrid Automat i c Repeat reQuest ) 时间表。 因此, 在 MBSFN子帧之后 ½s, 将会出现用于传输下行链路 DL的 HARQ反 馈。 因此在这一子帧中, 还应该禁止从 UE到中继节点的 UL传输, 以避免自千扰。
图 6示出了一种在中继站的 MBSFN子帧外的潜在自干扰。 在图 6中, 假设在第 i帧的第 7个子帧中执行基站到中继站的传输, 则中继站将会在 4ms后向基站 eNB 发送 HARQ反馈信息。 并且在该第 7个子帧中, 用户设备 UE没有接收到来自中继站 的任何控制信息, 则用户将在 4ms进行非自适应的自动重传。 因此在该子帧中, 中 继站在向基站反馈 HARQ 结果的同时, 会接收到来自用户设备的上行传输, 因此产 生自干扰, 这种情况是必须避免的。
现有技术己经提出了一种依靠调度程序来终止存在潜在自干扰的子帧上用户设 备的上行传输以解决这一问题, 例如, 通过具有零资源分配调度命令。 但是这种方 法没有明确地描述什么时候向用户设备发送零资源分配调度命令。 但是在 LTE中, 并没有定义零资源分配命令, 因此 LTE的终端用户收到零资源分配调度命令时不能 执行 JK常的操作, 即零资源分配调度命令将影响 3GPP R8协议中的用户操作。 这意 味着: 零资源分配调度方案不会支持后向兼容性, 因此依靠零资源分配调度命令来 解决这个问题是不可行的。 发明内容
本发明的目的是一种避免 BSFN ( Mult icast Broadcast Si ngle Frequency Network ) 的子帧外自干扰的方法、 中继节点和设备。 根据本发明的第一方面, 提出了一种中继节点, 用于避免多播广播单频网络 MBSFN 子帧外的潜在自干扰, 所述中继节点包括: 第一接收装置, 用于接收来自用 户设备的 HARQ UL传输; 第二接收装置, 用于接收来自基站的 MBSFN子帧配置信息; 反馈发送装置, 用于在所述: MBSFN子帧之后的子帧中向基站发送 HARQ反馈; 以及应 答发送装置, 用于在包含 HARQ反馈在内的子帧之前的第一时间段, 向用户设备发送 混合自动重传请求应答 HARQ ACK, 并且在第一时间段之后向用户设备发送 PDCCH; 其中在所述应答发送装置发送 PDCCH 恢复被暂缓的 HARQ进程的第二时间段之后, 所述第一接收装置从用户设备接收重新幵始的上行链路 HARQ。
优选地, 当所述配置信息表示将基站到中继节点的下行传输配置为 MBSFN子帧 时, 所述应答发送装置在所述 MBSFN子帧之前的第三时间段, 向用户设备发送混合 自动重传请求应答 HARQ ACK。
优选地, 所述第三时间段是 8mS
优选地, 所述应答发送装置与解码结果无关地向用户设备发送所述 HARQ应答。 优选地, 所述第一时间段和所述第二时间段均是 ½s。 根据本发明的第二方面, 提出了一种用户设备, 包括: HARQ ACK接收装置, 用 于接收 HARQ ACK和 PDCCH; 延缓控制装置, 用于在接收到 HARQ ACK时, 在壓 Q缓 冲器中保持上行链路 HARQ过程, 并且将与所述 MBSFN子帧相关的上行链路 HARQ过 程延缓到接收 PDCCH后的第二时间段; 以及重传装置, 用于所述第二时间段之后, 重新开始所延缓的上行链路 HARQ过程。
优选地, 所述重传装置使用物理下行控制信道 PDCCH重新幵始所延缓的上行链 路 HARQ过程。
优选地, 所述第二时间段是 4rns。 根据本发明的第三方面, 提出了一种避免多播广播单频网络 MBSFN子帧外的潜 在自干扰方法, 包括以下步骤: 将基站到中继节点的下行传输配置为 MBSFN子帧; 中继节点在所述 MBSFN子帧之后的子帧中反馈 HARQ反馈; 在包含所述 HARQ反馈在 内的子帧之前的第一时间段, 向用户设备发送混合自动重传请求应答 HARQ ACK, 并 且在第一时间段之后向用户设备发送 PDCCH;从接收 HARQ ACK开始,用户设备在 HARQ 缓冲器中保持上行链路 HARQ过程, 并且将与所述 MBSFN子帧相关的上行链路 HARQ 过程延缓到接收 PDCCH后的第二时间段; 在所述第二时间段之后, 所述用户设备重 新开始所延缓的上行链路 HARQ过程。
优选地, 当将基站到中继节点的下行传输配置为 MBSFN子帧时, 中继节点在所 述 MBSFN子帧之前的第三时间段,向用户设备发送混合自动重传请求应答 HARQ ACK。
优选地, 所述第三时间段是 8ms。
优选地, 所述中继节点与解码结果无关地向用户设备发送所述向用户设备发送 混合自动重传请求应答 HARQ ACK o
优选地, 所述中继节点使用物理下行控制信道 PDCCH重新开始所延缓的上行链 路 HARQ过程。
优选地, 所述第一时间段和所述第二时间段均是 4ms。 根据本发明的第四方面, 提出了一种通信系统, 包括中继节点、 基站和用户设 备,
所述中继节点包括: 第一接收装置, 用于接收来自用户设备的 HARQ UL传输; 第二接收装置, 用于接收 MBSFN子帧配置信息; 反馈发送装置, 用于在所述 MBSFN 子帧之后的子帧中向基站发送 HARQ反馈; 以及应答发送装置, '用于在包含 HARQ反 馈在内的子帧之前的第一时间段,向用户设备发送混合自动重传请求应答 HARQ ACK, 并且在第一时间段之后向用户设备发送 PDCCH;其中在发送 PDCCH恢复被暂缓的 HARQ 进程的第二时间段之后, 所述第一接收装置从用户设备接收重新开始的上行链路 IIARQ;
所述用户设备, 包括: HARQ ACK接收装置, 用于接收 HARQ ACK和 PDCCH; 延缓 控制装置, 用于在接收到 HARQ ACK时, 在 HARQ缓冲器中保持上行链路 HARQ过程, 并且将与所述 MBSFN子帧相关的上行链路 HARQ过程延缓到接收 PDCCH后的第二时间 段; 以及重传装置, 用于所述第二时间段之后, 重新开始所延缓的上行链路 HARQ过 程。 优选地, 所述第一时间段和所述第二时间段均是 ½S。 与现有技术相比, 本发明实施例无需对 LTE用户设备定义任意新的功能, 就可 以解决在 MBSFN子帧之后发生的潜在自千扰, 从而使得中继操作是后向兼容的。 附图说明
根据以下结合附图对本发明非限制实施例的详细描述, 本发明的以上和其他 g 的、 特征和优点将变得更加清楚, 其中:
图 1示出了根据本发明的一个实施例的 3GPP长期演进(LTE )通信系统的示意 图 ·'
图 2示出了根据本发明的一个实施例的一种避免 MBSFN子帧外的潜在自干扰方 法的示意图;
图 3示出了根据本发明的一个实施例的一种避免 MBSFN子帧外的潜在自干扰方 法的流程图;
图 4示出了根据本发明的一个实施例的另一种避免 MBSFN子帧外的潜在自干扰 方法的示意图;
图 5示出了根据本发明一个实施例的一种避免 MBSFN子帧外的潜在自干扰方法 的流程图; 以及
图 6示出了根据现有技术的在中继站的 MBSFN子帧外的潜在自干扰的示意图。 具体实施方式
下面, 将根据附图描述本发明的实施例。 在以下描述中, 一些具体的实施例只 用于描述的目的, 不应该将其理解为对于本发明的任何限制, 而只是示例。 当可能 导致使本发明的理解发生模糊时, 将省略传统结构或构造。
以下参照图 1, 对根据本发明的一个实施例的 3GPP长期演进 LTE通信系统的结 构进行描述。图 1示意性地示出了包括用户设备 UE201、中继节点 202和基站 eNB 203 的 LTE通信系统 200。 需要指出的该示意性的图 1省略了常规的结构或构造, 以免 导致。对本发明的理解不清楚。 图 1中的虚线箭头表示各个设备之间的无线电通信。
在本发明的实施例中, 用户设备 201包括: HARQ ACK接收装置 201 1 , 用于接收 HARQ ACK和 PDCCH ; 延缓控制装置 2012, 用于在接收到 HARQ ACK时, 在圃缓冲 器中保持上行链路 HARQ过程, 并且将与所述 MBSFN子帧相关的上行链路 HARQ过程 延缓到接收 PDCCH后的第二时间段(例如, ½s ) ; HARQ缓冲器 2013, 用于缓冲被延 缓的 HAQR过程; 以及重传装置 2014, 用于所述第二时间段之后, 重新开始所延缓 的上行链路 HARQ过程。
中继节点 202包括: 第一接收装置 2021, 用于接收来自用户设备的 HARQ UL传 输; 第二接收装置 20.22, 用于接收 MBSFN子帧配置信息; 反馈发送装置 2023, 用于 在所述 MBSFN子帧之后的子帧中向基站发送 HARQ反馈; 应答发送装置 2024 , 用于 在包含 HARQ反馈在内的子帧之前的第一时间段 (例如 ½s ), 向用户设备发送混合 自动重传请求应答 HARQ ACK ; 以及 HARQ UL缓冲发送装置 2025, 用于缓冲中继节点 的第一接收装置接收到的 HARQ UL传输, 随后发送给基站; 其中在所述应答发送装 置 2024发送 PDCCH恢复被延缓的 HARQ过程的第二时间段 (例如, 4ms )之后, 所述 第一接收装置 2021从用户设备接收重新幵始的上行链路 HARQ。
基站 203包括: HARQ反馈接收装置 2031, 用于接收中继节点 202发送的 HARQ 反馈; 配置信息发送装置 2032, 向中继节点发送所述配置消息; 配置装置 2033, 将 基站到中继节点的下行传输配置为 MBSFN子帧, 并且产生 MBSFN子帧配置消息; 以 及 UL传输接收装置 2034, 用于从中继节点接收上行链路数据。
当所述配置信息表示将基站到中继节点的下行传输配置为 MBSFN子帧时, 所述 应答发送装置 2024在所述 MBSFN子帧之前的第三时间段 (例如 8ms ), 向用户设备 发送混合自动重传请求应答 HARQ ACK„ 所述应答发送装置 2024可以与解码结果无 关地向用户设备 201发送所述 HARQ应答。 所述重传装置 2014使用物理下行控制信 道 PDCCH重新开始所延缓的上行链路 HARQ过程。
也就是说, 所述用户设备通过 HARQ ACK接收装置 201 1接收到从中继节点的应 答发送装置 2024发来的 HARQ应答时, 通过所述延缓控制装置 2012在 HARQ缓冲器 中保持上行链路 HARQ过程, 并且将与所述 MBSFN子帧相关的上行链路 HARQ过程延 缓到接收 PDCCH后的第二时间段 (例如, 4ms )。 此时, 没有关于 HARQ过程的 UL传 输, 而存在从中继节点到基站的 HARQ反馈, 从而避免了潜在的自干扰。
而对于中继节点而言, 通过应答发送装置 2024在包含 HARQ反馈在内的子帧之 前的第一时间段 (例如 ½S ), 向用户设备发送混合自动重传请求应答 HARQ ACK , 并 且在发送 HARQ ACK的第二时间段 (例如, 4ms ) 之后, 通过所述第一接收装置 2021 从用户设备接收重新幵始的上行链路 HARQ, 在这两个时间段之间, 通过反馈发送装 置 2023在所述 MBSFN子帧之后的子帧中向基站发送 HARQ反馈, 避免了与用户设备 的 UL传输的潜在自干扰。对于基站而言, 基站中的 HARQ反馈接收装置 2031接收中 继节点 202发送的 HARQ反馈, 通过配置装置 2033将基站到中继节点的下行传输配 置为 MBSFN子帧, 并且产生 MBSFN子帧配置消息, 通过配置信息发送装置 20332向 中继节点发送所述配置消息; 中继节点通过第二接收装置接收到来自基站的 MBSFN 子帧配置信息,根据所述 MBSFN子帧配置信息,通过反馈发送装置 2023在所述 MBSPN 子帧之后的子帧中向基站发送 HARQ反馈,并且应答发送装置 2024在包含 HARQ反馈 在内的子帧之前的第一时间段, 向用户设备发送混合自动重传请求应答 HARQ AC , 或者在所述 MBSFN子帧之前的第三时间段, 向用户设备发送混合自动重传请求应答 用户设备通过 HARQ ACK接收装置 2011接收到从中继节点的应答发送装置 2024 发来的 HARQ应答时, 通过所述延缓控制装置 2012在 HARQ缓冲器中保持上行链路 HARQ过程, 并且将与所述 MBSFN子帧相关的上行链路 HARQ过程延缓到接收 PDCCH 后的第二时间段 (例如, 4ms )。 此时, 没有关于 HARQ过程的 UL传输, 而存在从中 继节点到基站的 HARQ反馈, 从而避免了潜在的自干扰。 虽然上面以分离的功能模块的形式描述了本发明实施例的基站、 中继节点和用 户设备, 但是图 1 中示出的每一个组件在实际应用中可以用多个器件实现, 示出的 多个组件在实际应用中也可以集成在一块芯片或一个设备中
为了简化描述, 根据当前的 LTE HARQ时间表, 假设 MBSFN子帧是第 n个子帧, 用于基站到中继节点的下行(DL )传输。 那么因此, 从中继节点到基站的 HARQ反馈 将出现在第 (n+4 ) 个子帧处。
根据上行(UL )同步 HARQ方案,如果从用户设备到基站的 UL传输出现在第(n_4 ) 个子帧处, 那么将在中继节点到基站的 UL链路和从用户设备到基站的接入 UL链路 之间出现潜在的冲突。
为解决这一问题, 应该延缓第 (π-4 ) 子帧处的终端用户设备的 UL传输, 以便 避免第 (n+4 )个子帧处潜在的重传, 从而避免了潜在的干扰。 但是如何实现这一目 标, 同时不会影响用户设备的当前状态(例如,保持相关的 HARQ缓冲器)是个问题。
在 LTE中已经定义了当用户设备接收 ACK但是没有接收 UL资源分配命令时,用 户设备应该保持其缓冲器并且等待基站的进一步指示。 这种用户设备工作原理的目. 的是为了解决 LTE中的将 NACK误认为是 ACK的情况。基于这种用户设备操作, 如果 中继节点与解码结果无关地在第 (n-8 ) 子帧时向下向用户设备发送 HARQ ACK, 用 户设备应该保持其 HARQ缓冲器, 并且在第 (π- 4 )个子帧时延缓 UL传输, 因此在第 ( n+4 ) 时潜在的重传将不会发生, 从而避免了中继节点到基站的 UL传输和从用户 设备到基站的 UL传输之间可能存在的干扰。
因此, 根据本发明的实施例, 提出了在 MBSFN子帧之前 8ms中继节点应该向下 发送 HARQ ACK, 以避免在 MBSFN子帧 4ms之后发生的潜在的自干扰。
图 2 示出了用于根据本发明第一实施例的用于解决潜在的自干扰的方法示意 图。 如图 2所示, 当将中继节点配置用于基站到中继节点的下行传输的 MBSFN时, 中继节点与解码结果成功与否无关地在 MBSFN子帧之前的 8ms产生 HARQ ACK。那么, 用户设备将与 MBSFN子帧相关的 UL传输延缓 ½s, 因此在 MBSFN子帧之后的 ½s之 后不会发生 UL传输。 明显的是这不会影响 LTE用户的操作。 此后, 中继节点应该使 用物理下行控制信道 (PDCCH ) 重新幵始所延缓的 UL HARQ过程。
具体地, 在图 2中, 假设基站到终端的传输发生在第 n个子帧, 则该子帧被配 置为 MBSFN子帧。 则在第 (n-8 )子帧中, 中继节点向终端用户设备发送与解码结果 无关的 HARQ ACK, 因此终端用户设备将不会在第 (n- 4 ) 的子帧中执行到中继节点 的上行传输。 因此在第 π个子帧中, 即使终端用户设备没有接收到任何信息, 终端 用户设备也不会在第(n+4 )子帧中执行上行传输, 因此在中继节点中不会产生自干 扰。
图 3示出了根据本发明所实施例的避免 MBSFN子帧的潜在自干扰方法的流程图。 下面结合图 2和图 3描述所述避免 MBSFN子帧外的潜在自干扰方法。
首先,通过基站的配置装置 2023将基站到中继节点的下行传输配置为 MBSFN子 帧 (S301 )。
中继节点在所述 MBSFN子帧之前的第三时间段,通过应答发送装置 2024向用户 设备发送混合自动重传请求应答 HARQ ACK (S302 )。
从接收 HARQ ACK幵始, 用户设备通过延缓控制装置 2012在 HARQ缓冲器中保持 上行链路 HARQ过程, 并且将与所述 MBSFN子帧相关的上行链路 HARQ过程延缓到接 收 PDCCH后的第二时间段 (S303 )。
述第二时间段之后,所述用户设备通过重传装置 2014重新幵始所延缓的上行链 路圖过程 ( S304 ) o 其中,所述中继节点可以与解码结果无关地通过应答发送装置 2024向用户设备 发送所述向用户设备发送混合自动重传请求应答 HARQ ACK。 所述中继节点还可以使 用物理下行控制信道 PDCCH重新开始所延缓的上行链路 HARQ过程。其中所述第一时 间段和所述第二时间段均是 ½s, 以及所述第三时间段是 8ms。
这里判断中继节点何时向用户发送与解码无关的 ACK的时间, 是以 MBSFN配置 来定位的, 即在 MBSFN子帧的前 8ms发送 ACK。 其基础是中继在 MBSFN子帧 4ms后 向基站发送 HARQ 反馈。 另外, 本发明的实施例也可以应用于其他场景: 即中继节 点没有在 MBSFN子帧 4ms之后向基站反馈 HARQ反馈, 而是在 MBSFN 子帧之后的某 一个子帧中反馈 HARQ 反馈。 此时就不能以 MBSFN子帧来定位何时向终端用户发送 ACK , 而应该以中继节点被配置为发送与 MBSFN子帧的 HARQ反馈相对应的子帧来定 位发送 ACK 到终端的时间。 此时分两种情况:
• 如果中继节点向基站发送 HARQ反馈发生在 MBSFN 4ms之后的子帧, 则执行 根据本发明第一实施例的过程;
• 如果中继节点向基站发送 HARQ反馈发生在 MBSFN ½s之后的其他子帧, 则 以中继节点向基站发送 HARQ反馈的子帧为基点, 在该基点的 4ms之前向用 户发送 ACK即可。
图 4 示出了用于根据本发明第二实施例的用于解决潜在的自干扰的方法示意 图。 如图 4所示, 将基站到中继节点的下行传输配置为 MBSFN子帧; 中继节点在所 述 MBSFN子帧之后的子帧 (在本发明实施例中是地 (i + 1 ) 个无线帧的第 4个子帧) 中反馈 HARQ反馈; 在包含所述 HARQ反馈的子帧之前的第一时间段(4ms, 在本发明 实施例中是地 (i + 1 ) 个无线帧的第 0个子帧), 在这里是向用户设备发送混合自动 重传请求应答 HARQ ACK; 用户设备在 HARQ缓冲器中保持上行链路 HARQ过程, 并且 将与所述 MBSFN子帧相关的上行链路 HARQ过程延缓第二时间段(½s ); 在所述第二 时间段之后, 所述中继节点重新开始所延缓的上行链路 HARQ过程。 而在这个时刻, 从中继节点到基站的 HARQ反馈己经完成, 从而避免了潜在的自干扰。
图 5示出了根据本发明第二实施例的避免 MBSFN子帧的潜在自干扰方法的流程 图。 下面结合图 2和图 5描述所述避免多播广播单频网络 MBSFN子帧外的潜在自干 扰方法。
首先, 通过基站 203 中的配置装置 2033将基站到中继节点的下行传输配置为 MBSFN子帧 ( S50l )。 中继节点通过反馈发送装置 2023在所述 MBSFN子帧之后的子帧中反馈 HARQ反 馈(S502 )。这里可以理解的是所述 MBSFN子帧之后的子帧不局限于紧邻的 MBSFN子 帧, 只要其位于 MBSFN子帧之后均可。
然后, 在包含所述 HARQ反馈的子帧之前的第一时间段(4ms ), 中继节点通过应 答发送装置 2024向用户设备发送混合自动重传请求应答 HARQ ACK (S503 )。
中继节点在发送 HARQ ACK到用户设备之后, 其 4ms之后的上行链路 HARQ被延 缓, 然后中继节点在被暂缓的子帧 4ms之后发送 PDCCH去恢复被延缓的 HARQ, 在 PDCCH发送的 ½s以后的子帧中才会重新收到被延缓的 HARQ过程。 因此, 用户设备 通过延缓控制装置 2012在 HARQ缓冲器中保持上行链路 HARQ过程, 并且将与所述 MBSFN 子帧相关的上行链路 HARQ 过程延缓到接收 PDCCH 后的第二时间段 (½s ) ( S504 ) o
在所述第二时间段(4ms )之后, 所述中继节点通知用户设备使用重传装置重新 幵始所延缓的上行链路 HARQ过程(S505 )。具体来说, 所述中继节点可以通过 PDCCH 信道通知用户设备重新开始所延缓的上行链路 HARQ过程。这时, 中继节点中的第一 接收装置就可以继续接收到来自用户设备的 HARQ UL传输, 然后通过中继节点中的 HARQ UL缓冲发送装置 2025进行常规的缓冲或转发操作, 在中继节点和基站之间执 行常规的上行链路传输。 根掂本发明的实施例, 无需对于 LTE用户设备的任意新的功能, 就可以解决在 MBSFN子帧之后发生的潜在的自于扰。 从而使得中继操作是后向兼容的。 本领域技术人员应该很容易认识到, 可以通过编程计算机实现上述方法的不同 步骤。 在此, 一些实施方式同样包括机器可读或计算机可读的程序存储设备 (如, 数字数据存储介质) 以及编码机器可执行或计算机可执行的程序指令, 其中, 该指 令执行上述方法的一些或全部步骤。 例如, 程序存储设备可以是数字存储器、 磁存 储介质(如磁盘和磁带)、 硬件或光可读数字数据存储介质。 实施方式同样包括执行 上述方法的所述步骤的编程计算机。
描述和附图仅示出本发明的原理。 因此应该意识到, 本领域技术人员能够建议 不同的结构, 虽然这些不同的结构未在此处明确描述或示出, 但体现了本发明的原 理并包括在其精神和范围之内。 此外, 所有此处提到的示例明确地主要只用于教学 目的以帮助读者理解本发明的原理以及发明人所贡献的促进本领域的构思, 并应被 解释为不是对这些特定提到的示例和条件的限制。 此外, 此处所有提到本发明的原 则、 方面和实施方式的陈述及其特定的示例包含其等同物在内。
! 0

Claims

权 利 要 求
1.一种中继节点, 用于避免多播广播单频网络 MBSFN子帧外的潜在自干扰, 所 述中继节点包括:
第一接收装置, 用于接收来自用户设备的 HARQ UL传输;
第二接收装置, 用于接收来自基站的 MBSFN子帧配置信息;
反馈发送装置, 用于在所述 MBSFN子帧之后的子帧中向基站发送 HARQ反馈; 以 及
应答发送装置, 用于在包含 HARQ反馈在内的子帧之前的第一时间段, 向用户设 备发送混合自动重传请求应答 HARQ ACK , 并且在第一时间段之后向用户设备发送 PDCCH;
其中在所述应答发送装置发送 PDCCH 恢复被暂缓的 HARQ进程的第二时间段之 后, 所述第一接收装置从用户设备接收重新幵始的上行链路 HARQ。
2. 根据权利要求 1所述的中继节点, 其中当所述配置信息表示将基站到中继节 点的下行传输配置为 MBSFN子帧时, 所述应答发送装置在所述 MBSFN子帧之前的第 三时间段, 向用户设备发送混合自动重传请求应答 HARQ ACK„
3. 根据权利要求 2所述的中继节点, 其中所述第三时间段是 8ms。
4.根据权利要求 1所述的中继节点, 其中所述应答发送装置与解码结果无关地 向用户设备发送所述 HARQ应答。
5. 根据权利要求 1-4中任一项所述的中继节点, 其中所述第一时间段和所述第 二时间段均是 ½s。
6.—种用户设备, 包括:
HARQ ACK接收装置, 用于接收 HARQ ACK和 PDCCH;
延缓控制装置,用于在接收到 HARQ ACK时,在 HARQ缓冲器中保持上行链路 HARQ 过程,并且将与所述 MBSFN子帧相关的上行链路 HARQ过程延缓到接收 PDCCH后的第 二时间段; 以及
重传装置, 用于所述第二时间段之后, 重新开始所延缓的上行链路 HARQ过程。
7. 根据权利要求 6所述的用户设备, 其中所述重传装置使用物理下行控制信道 PDCCH重新幵始所延缓的上行链路 HARQ过程。
8.根据权利要求 6所述的用户设备, 其中所述第二时间段是 4ms。
9.一种避免多播广播单频网络 MBSFN子帧外的潜在自干扰方法,包括以下步骤: 将基站到中继节点的下行传输配置为 MBSFN子帧;
中继节点在所述 MBSFN子帧之后的子帧中反馈 HARQ反馈;
在包含所述 HARQ反馈在内的子帧之前的第一时间段,向用户设备发送混合自动 重传请求应答 HARQ ACK, 并且在第一时间段之后向用户设备发送 PDCCH;
从接收 HARQ ACK开始, 用户设备在 HARQ缓冲器中保持上行链路 HARQ过程, 并 且将与所述 MBSFN子帧相关的上行链路 HARQ过程延缓到接收 PDCCH后的第二时间 段;
在所述第二时间段之后, 所述用户设备重新开始所延缓的上行链路 HARQ过程。
10. 根据权利要求 9所述的方法, 其中当将基站到中继节点的下行传输配置为 MBSFN子帧时, 中继节点在所述 MBSFN子帧之前的第三时间段, 向用户设备发送混 合自动重传请求应答 HARQ ACKo
1 1. 根据权利要求 9所述的中继节点, 其中所述第三时间段是 8ms。
12.根据权利要求 9所述的方法,其中所述中继节点与解码结果无关地向用户设 备发送所述向用户设备发送混合自动重传请求应答 HARQ ACK。
13. 根据权利要求 9 所述的方法, 其中所述中继节点使用物理下行控制信道 PDCCH重新幵始所延缓的上行链路 HARQ过程。
14. 根据权利要求 9- 13中任一项所述的方法, 其中所述第一时间段和所述第二 时间段均是 ½s。
15.—种通信系统, 包括中继节点、 基站和用户设备,
所述中继节点包括:
第一接收装置, 用于接收来自用户设备的 HARQ UL传输;
第二接收装置, 用于接收 MBSFN子帧配置信息;
反馈发送装置,用于在所述 MBSFN子帧之后的子帧中向基站发送 HARQ 反馈; 以及
应答发送装置,用于在包含 HARQ反馈在内的子帧之前的第一时间段, 向用户设备发送混合自动重传请求应答 HARQ ACK, 并且在第一时间段之 后向用户设备发送 PDCCH;
其中在发送 PDCCH恢复被暂缓的 HARQ进程的第二时间段之后, 所述 第一接收装置从用户设备接收重新幵始的上行链路 HARQ;
所述用户设备, 包括:
HARQ ACK接收装置, 用于接收 HARQ ACK和 PDCCH;
延缓控制装置, 用于在接收到 HARQ ACK时, 在 HARQ缓冲器中保持上 行链路 HARQ过程,并且将与所述 MBSFN子帧相关的上行链路 HARQ过程延 缓到接收 PDCCH后的第二时间段; 以及
重传装置, 用于所述第二时间段之后, 重新开始所延缓的上行链路
HARQ过程。
16. 根据权利要求 15所述的通信系统, 其中所述第一时间段和所述第二时间段 均是 4ms。
PCT/CN2009/000946 2009-08-18 2009-08-18 避免mbsfn子帧外自干扰的方法、中继节点和用户设备 WO2011020215A1 (zh)

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