WO2014201875A1 - Procédé pour éliminer un brouillage à ouverture en croix, et terminal - Google Patents

Procédé pour éliminer un brouillage à ouverture en croix, et terminal Download PDF

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Publication number
WO2014201875A1
WO2014201875A1 PCT/CN2014/072433 CN2014072433W WO2014201875A1 WO 2014201875 A1 WO2014201875 A1 WO 2014201875A1 CN 2014072433 W CN2014072433 W CN 2014072433W WO 2014201875 A1 WO2014201875 A1 WO 2014201875A1
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WO
WIPO (PCT)
Prior art keywords
terminal
cross
interference
slot interference
cell
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Application number
PCT/CN2014/072433
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English (en)
Chinese (zh)
Inventor
张连波
李云波
张佳胤
Original Assignee
华为技术有限公司
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Publication of WO2014201875A1 publication Critical patent/WO2014201875A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J11/00—Orthogonal multiplex systems, e.g. using WALSH codes
    • H04J11/0023—Interference mitigation or co-ordination
    • H04J11/005—Interference mitigation or co-ordination of intercell interference
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H04W76/14—Direct-mode setup

Definitions

  • the present invention relates to the field of communications, and in particular, to a method and a terminal for eliminating cross-slot interference. Background technique
  • Duplex is defined as the way information can be sent simultaneously in two directions between two points.
  • the commonly used duplex mode is sometimes divided into duplex (Time Division Duplex, TDD for short), Frequency Division Duplex (FDD), and Hybrid Division Duplex (HDD).
  • TDD Time Division Duplex
  • FDD Frequency Division Duplex
  • HDD Hybrid Division Duplex
  • TDD mode if the uplink and downlink switching points (Switch Point) in the frame structure remain unchanged while the wireless communication system is running, it is called static TDD; if the uplink and downlink switching points (Switch Point) in the frame structure are When the system is running, it changes in a small time scale (for example, less than 100ms), so it is called dynamic TDD.
  • the downlink interference comes from the neighboring base station (or Access Point (AP), LTE base station (eNodeB), etc.) to the target mobile station. (or the interference of the terminal (STA), User Equipment (UE), etc.); the uplink interference comes from the neighboring mobile station (or STA, UE, etc.) to the target base station (or AP, eNodeB, etc.) interference.
  • AP Access Point
  • eNodeB LTE base station
  • the uplink interference comes from the neighboring mobile station (or STA, UE, etc.) to the target base station (or AP, eNodeB, etc.) interference.
  • Figure 1 In a dynamic TDD system, if the uplink and downlink switching points between the neighboring cells are not aligned, and the uplink and downlink frames have mutually interleaved portions, in addition to the interference in FIG.
  • the embodiments of the present invention provide a method and a terminal for eliminating cross-slot interference, which are used to eliminate cross-slot interference between STAs and terminals in the prior art.
  • the embodiment of the present invention provides a method for eliminating cross-slot interference, including: if the first terminal is in a downlink receiving state, and the second terminal is in an uplink sending state, the first terminal reconstructs the second Inter-slot interference caused by the terminal to the first terminal; the second terminal is a terminal in the interference set of the first terminal;
  • the first terminal removes the cross-slot interference in the received downlink information, and obtains downlink information after the cross-slot interference is eliminated.
  • the method before the resolving, by the first terminal, the cross-slot interference caused by the second terminal to the first terminal, the method further includes:
  • the first terminal creates an interference set of the first terminal, where the interference set includes at least one second terminal in a neighboring cell of the cell where the first terminal is located.
  • the first terminal where the first terminal creates an interference set of the first terminal, includes:
  • the first terminal sends the search information to all the second terminals in the preset range, and receives the response information fed back by the second terminal according to the search information;
  • the first terminal creates a device-to-device D2D set of the first terminal according to the response information, where the D2D set includes information of the second terminal corresponding to the response information;
  • the first terminal measures the received power of the local area of the access point of the cell where the first terminal is located, and measures the received power of the neighboring area of the access point in the neighboring cell of the cell where the first terminal is located; And if the absolute value of the difference between the received power of the local area and the received power of the neighboring area is less than a preset threshold, the second terminal served by the access point corresponding to the received power of the neighboring area in the D2D set is interfered with set.
  • the first terminal sends the search information to all the second terminals in the preset range, including:
  • the first terminal broadcasts a search to all second terminals in the preset range by using a broadcast polling manner.
  • the method further includes:
  • the first terminal periodically updates the interference set.
  • the method further includes: The first terminal sends the interference set to the access point of the cell where the first terminal is located, so that the access point of the cell where the first terminal is located sets the interference set and the neighboring cell of the cell where the first terminal is located The access point is shared.
  • the first terminal reconfiguring the cross-slot interference caused by the second terminal to the first terminal includes: The first terminal acquires channel state information between the first terminal and the second terminal
  • the acquiring, by the first terminal, the CSI between the first terminal and the second terminal includes:
  • the first terminal acquires uplink measurement pilot information of the second terminal by using a D2D technology; the first terminal measures an uplink pilot signal of the second terminal according to the uplink measurement pilot information, to obtain the CSI between a terminal and the second terminal.
  • the cross-slot interference caused by the second terminal to the first terminal is reconstructed according to the CSI, Includes:
  • the first terminal receives the data sent by the second terminal by using the D2D technology, and obtains a channel between the first terminal and the second terminal according to the CSI corresponding to the second terminal; And reconstructing, according to the channel and the data, cross-slot interference caused by the second terminal to the first terminal.
  • an embodiment of the present invention provides a terminal, including:
  • a cross-slot interference reconstruction unit configured to: when the terminal is in a downlink receiving state, and when the second terminal is in an uplink sending state, reconstructing, by the second terminal, the cross-slot interference caused by the second terminal; a terminal in the interference set of the terminal;
  • a cross-slot interference removal unit configured to remove the cross-slot interference in the received downlink information after the cross-slot interference reconstruction unit reconstructs the cross-slot interference, and obtain the cross-slot interference cancellation Downstream information.
  • the terminal further includes: a creating unit, configured to create the terminal before the cross-slot interference reconstruction unit reconstructs the cross-slot interference
  • the interference set includes at least one second terminal in a neighboring cell of the cell where the terminal is located.
  • the creating unit is specifically configured to be used
  • the second terminal served by the access point corresponding to the received power of the neighboring area in the D2D set is interfered with set.
  • the terminal further includes: a sharing unit;
  • the sharing unit is configured to: after the creating unit creates the interference set, send the interference set to an access point of a cell where the terminal is located, so that an access point of a cell where the terminal is located: the interference
  • the set is shared with an access point in a neighboring cell of the cell in which the terminal is located.
  • the cross-slot interference reconstruction unit is specifically used to
  • the D2D technology is used to obtain the uplink measurement pilot information of the second terminal in the uplink sending state
  • the cross-slot interference reconstruction unit is specifically used for
  • the method and the terminal for eliminating the cross-slot interference in the embodiment of the present invention can reconstruct the cross-slot interference caused by the second terminal to the first terminal when the first terminal and the second terminal are simultaneously scheduled, so that The first terminal removes the cross-slot interference in the received downlink information, and obtains the downlink information after the cross-slot interference is eliminated, thereby achieving the purpose of eliminating the cross-slot interference between the STAs/terminals in the prior art.
  • FIG. 1 is a schematic diagram of neighboring interference in a static TDD system in the prior art
  • FIG. 2 is a schematic diagram of cross-slot interference in a dynamic TDD system in the prior art
  • FIG. 3 is a schematic diagram of isolation of clusters in the prior art.
  • FIG. 4 is a schematic diagram of dynamic TDD based on resource allocation and power control in the prior art
  • FIG. 5 is a schematic diagram of HDD frequency resource allocation in the prior art
  • FIG. 6 is a schematic diagram of cross-slot interference cancellation of an HDD in the prior art
  • FIGS. 7A-7D are schematic flowcharts of a method for eliminating cross-slot interference according to an embodiment of the present invention.
  • FIG. 8 is a schematic structural diagram of a method for eliminating cross-slot interference according to an embodiment of the present invention
  • FIG. 8B is a schematic flowchart of a method for eliminating cross-slot interference according to another embodiment of the present invention
  • FIG. 9A and FIG. 9B are schematic diagrams showing the structure of a terminal according to an embodiment of the present invention.
  • FIG. 10 is a schematic structural diagram of a terminal according to another embodiment of the present invention. detailed description
  • the first method for reducing cross-slot interference is to divide the BSs into the same cluster if the large-scale fading between the BSs (or APs, eNodeBs, etc.) is lower than a certain threshold. (Cluster).
  • Static TDD is used for all cells in the same cluster, and the switching points of the uplink and downlink frames are aligned. However, for different clusters, the switching points of the uplink and downlink frames between each other do not need to be aligned. As shown in Figure 3.
  • Dynamic TDD also reduces the flexibility of dynamic TDD. For seamless coverage scenarios, the interference problem at the edge of the cluster is still unresolved. In particular, if the cluster is too large and contains too many BSs, the meaning of dynamic TDD will be lost.
  • the second method for reducing cross-slot interference is provided in the prior art, specifically: first, the MS (or STA, UE, etc.) in the cell is divided into inner rings according to signal reception quality or signal reception strength (inner) And the outer circle (outer); Secondly, by the resource allocation method, the resources close to the switching point are preferentially assigned to the inner circle MS (the time slot near the switching point is more likely to be interfered). Since the inner ring MS needs lower downlink (DL) and uplink (UL) power to meet the performance requirements, the interference power between the MS-MSs is reduced. As shown in Figure 4.
  • the technical solution of the prior art 2 does reduce the cross-slot interference power between the BSs, but since the UL transmit power of the inner ring MS is also reduced, the UL signal to interference and noise ratio of the inner ring MS (Signal) To Interference plus Noise Ratio (SINR) is not necessarily improved.
  • a third method for reducing cross-slot interference is provided, which is specifically: dividing an MS (or STA, UE, etc.) in a cell into an inner circle (inner) and an outer according to signal reception quality or signal reception strength. Outer. And two duplex modes (FDD and TDD, hybrid duplex mode HDD) are used at the same time, and the two duplex modes work on separate frequency bands (or carriers).
  • FDD and TDD, hybrid duplex mode HDD two duplex modes
  • the two duplex modes work on separate frequency bands (or carriers).
  • the disadvantage of adopting HDD in the third technical solution is that the system complexity is high, and the two duplex modes are adopted, and the wireless communication system is difficult to implement.
  • the outer circle users separately occupy the uplink FDD—an independent frequency band (carrier), it is inconsistent with the dynamic adaptability of dynamic TDD to resources.
  • the complexity of system resource scheduling is also high.
  • the embodiments of the present invention provide a technical solution for eliminating interference between STAs and STAs.
  • the scheduling can be used for interference coordination. It should be noted that even if centralized scheduling is used for interference coordination, it is necessary to know the interference set of the STA.
  • centralized scheduling does not work, for example, STA pairs that interfere with each other require large bandwidth, or time is required due to carrier switch (similar to Radio Resource Control (RRC) signaling in LTE. Interacting) If there is no time to stagger the carrier, the interference cancellation method is used.
  • the STA may be considered to have an uplink measurement function, reconstruct the cross-slot interference signal, and then downlink the receiver in the STA. Eliminate upstream interference.
  • the STAs are required to send data through the Device to Device (D2D) technology.
  • D2D Device to Device
  • a terminal may be referred to as a UE, a mobile station (Mobile Station, referred to as "MS"), a mobile terminal (Mobile Terminal) STA, etc.
  • the terminal may be a mobile phone ( Or a "cellular" telephone, a computer with a mobile terminal, etc., for example, the terminal can also be a portable, pocket, handheld, computer built-in or in-vehicle mobile device.
  • FIG. 7A is a schematic flowchart showing a method for eliminating cross-slot interference according to an embodiment of the present invention. As shown in FIG. 7A, the method for eliminating cross-slot interference in this embodiment is as follows.
  • the first terminal reconstructs the cross-slot interference caused by the second terminal to the first terminal; A terminal in the interference set of the first terminal.
  • the first terminal removes the cross-slot interference in the received downlink information, and obtains downlink information after the cross-slot interference is removed.
  • the interference set of the first terminal may be the interference set created by the first terminal by using the D2D technology, or the interference set of the first terminal may also share the interference set of the first terminal by other terminals, which is not performed in this embodiment. limited.
  • the cross-slot interference cancellation method in this embodiment may reconfigure the cross-slot interference caused by the second terminal to the first terminal when the first terminal and the second terminal are simultaneously scheduled, so that the first terminal is in the received downlink information.
  • the cross-slot interference is removed, and the downlink information after the cross-slot interference cancellation is obtained, thereby achieving the purpose of eliminating the cross-slot interference between the STAs in the prior art.
  • the foregoing method further includes the following step 100:
  • the first terminal creates an interference set of the first terminal, where the interference set includes at least one second terminal in a neighboring cell of the cell where the first terminal is located.
  • the first terminal may create a interference set of the first terminal by using D2D technology.
  • the cross-slot interference cancellation method of the embodiment the interference set is created by the first terminal, and the cross-slot interference caused by the second terminal to the first terminal can be reconstructed when the first terminal and the second terminal are simultaneously scheduled, so that The first terminal removes the cross-slot interference in the received downlink information, and obtains the downlink information after the cross-slot interference is eliminated, thereby eliminating the cross-slot interference between the STAs in the prior art.
  • the foregoing step 100 may include sub-steps 1001 to sub-steps not shown in the following figure. 1004:
  • the first terminal sends the search information to all the second terminals in the preset range, and receives the response information fed back by the second terminal according to the search information.
  • the first terminal broadcasts the search information to all the second terminals in the preset range by using a Broadcast Poll.
  • the first terminal creates a D2D set of the first terminal according to the response information, where the D2D set includes information about a second terminal corresponding to the response information;
  • the first terminal measures the received power of the local area of the access point of the cell where the first terminal is located, and measures the received power of the neighboring area of the access point in the neighboring cell of the cell where the first terminal is located.
  • the local area receiving power PI of the access point API of the cell where the first terminal is located, and the neighboring area receiving power of the access point ⁇ in the neighboring cell of the first terminal are ⁇ .
  • the second terminal served by the access point corresponding to the received power of the neighboring cell in the D2D set is used. Compose the interference set.
  • the access point corresponding to the neighboring received power Pi in the D2D set is ⁇
  • the second terminal served constitutes a set of interference.
  • the access point ⁇ in the neighboring cell of the cell where the first terminal is located refers to the access point AP in the first neighboring cell of the cell where the first terminal is located.
  • the range of 1 is a positive integer greater than 1, and less than or equal to the total number of neighbors plus one. If the total number of neighboring cells in the cell where the first terminal is located is five, the value of i is 2 to 6.
  • the first terminal may periodically update the interference set. That is to say, in the actual application, since the first terminal has mobility, the interference set of the first terminal needs to be periodically updated.
  • the method further includes a step not shown in the following figure. 100a:
  • the first terminal sends the interference set to an access point of a cell where the first terminal is located, so that an access point of a cell where the first terminal is located, the interference set, and a cell where the first terminal is located Access points in the neighboring area are shared.
  • the foregoing step 100a may be located before any of the foregoing steps 101, 102, or after any step, which is not limited in this embodiment.
  • the aforementioned step 101 may include the following sub-step 1011 and sub-step 1012:
  • the first terminal acquires channel state information between the first terminal and the second terminal.
  • the acquiring, by the first terminal, the CSI between the first terminal and the second terminal includes: the first terminal may obtain the uplink measurement pilot information of the second terminal in an uplink sending state by using the D2D technology; And measuring an uplink pilot signal of the second terminal according to the uplink measurement pilot information, to obtain CSI between the first terminal and the second terminal in an uplink sending state.
  • the first terminal receives the data sent by the second terminal by using the D2D technology, and obtains a channel between the first terminal and the second terminal according to the CSI corresponding to the second terminal; The channel and the data reconstruct cross-slot interference caused by the second terminal to the first terminal.
  • the method for eliminating cross-slot interference in the above embodiment can eliminate cross-slot interference between STAs in the prior art.
  • FIG. 7D is a schematic flowchart of a method for eliminating cross-slot interference according to an embodiment of the present invention. As shown in FIG. 7D, the method for eliminating cross-slot interference in this embodiment is as follows.
  • the first terminal uses the D2D technology to create the interference set of the first terminal, where the interference set includes at least one second terminal in the neighboring cell of the cell where the first terminal is located.
  • the first terminal acquires CSI between the first terminal and each second terminal in the interference set.
  • CSI may refer to a channel matrix H between a first terminal and a second terminal (referred to as a channel)
  • the first terminal When the first terminal is in a downlink receiving state, and the target second terminal is in an uplink sending state, the first terminal reconstructs the target second terminal according to the CSI corresponding to the target second terminal. Inter-slot interference caused by the first terminal.
  • the target second terminal is a general term of one or more second terminals in the uplink transmission state in the interference set.
  • the first terminal removes the cross-slot interference in the received downlink information, and obtains downlink information after the cross-slot interference is eliminated.
  • the interference set is created by the first terminal, and the CSI between the first terminal and the second terminal in the interference set is obtained, and then the first terminal and the target second terminal are simultaneously During the scheduling, the cross-slot interference information caused by the second terminal to the first terminal may be reconstructed, so that the first terminal removes the cross-slot interference information in the received downlink information, and obtains the downlink information after the cross-slot interference is eliminated, and further Eliminating cross-slot interference between STAs in the prior art.
  • step 202 may include sub-steps 2021 through 2022 of not shown in the following figures:
  • the first terminal acquires uplink measurement pilot information of each second terminal in the interference set by using a D2D technology.
  • the first terminal is configured to measure, according to the uplink measurement pilot information, an uplink pilot signal of the second terminal that is corresponding to the uplink measurement pilot information, to obtain that the first terminal corresponds to the uplink measurement pilot information.
  • CSI between the second terminals.
  • the aforementioned step 203 can include sub-steps 2031 through 2032, which are not shown in the following figures:
  • the first terminal receives the data ⁇ transmitted by the target second terminal by using the D2D technology, and obtains the channel Hli between the first terminal and the target second terminal according to the CSI corresponding to the target second terminal. ; 2032.
  • the first terminal reconstructs, according to the channel Hli and the data Xi, a cross-slot interference ⁇ 1 ⁇ caused by the target second terminal to the first terminal.
  • Xi in step 2031 refers to data X transmitted by the second terminal in the first neighboring cell of the cell where the first terminal is located
  • Dli in step 2032 refers to the first terminal.
  • FIG. 8A is a block diagram showing a method for eliminating cross-slot interference cancellation according to an embodiment of the present invention
  • FIG. 8B is a schematic flowchart showing a method for eliminating cross-slot interference according to another embodiment of the present invention.
  • the cross-slot interference cancellation method in this embodiment is as follows.
  • the STA In a dynamic TDD system, in order to eliminate cross-slot interference between STAs (or MSs, etc.), the STA needs to have an uplink measurement function, reconstruct cross-slot interference, and then eliminate uplink interference in the STA downlink receiver.
  • STA1 creates an interference set of the STA1.
  • STA1 knows which STAs are in the surrounding (ie, preset range) through D2D technology.
  • the STA1 can use the broadcast polling method to send the search information to the second terminal in the preset range.
  • the STA2 (ie, the second terminal) around the STA1 can feedback its existence according to the search information, and the feedback manner can be time-divided. , frequency division or code division.
  • the preset range is usually less than or equal to the coverage of the base station corresponding to STA1 or the coverage of the access point API of the local area.
  • the STA2 of the feedback response information around the STA1 may have the STA1 in the local area or the STA2 in the neighboring area, and all the STA2s that feedback the response information constitute the D2D set of the STA1.
  • the response information may include information such as STA2's Media Access Control (MAC) address, or STA2 identifier.
  • MAC Media Access Control
  • STA1 measures the received power of the API in the local area and the neighboring area APi. It is assumed that the received power P1 of the local area and the received power Pi of a neighboring area. If the absolute value abs(Pl-Pi) ⁇ threshold (preset threshold) is taken, STA1 will The STA2 of the APi service in the D2D group is placed in the interference set of STA1.
  • the neighboring cell in this embodiment generally refers to a cell having radio signals overlapping each other.
  • the STA1 reports the interference set to the API, and the API shares the interference set information with the neighboring area APi through the backhaul (backhaul line).
  • the interference set of STA1 needs to be more cyclical. New. If the STA is in a scene with a relatively fast mobility, the period may be shorter; in a scenario where the STA is slower, the period may be longer. The period of the place is set according to actual needs.
  • STA1 acquires CSI between the STA1 and each STA2 in the interference set.
  • STA1 and its neighboring cell in the interference set STA2 exchanges respective uplink measurement sounding information such as time period, frequency domain position, sounding power, etc. through D2D;
  • the STA1 measures the uplink measurement pilot (sounding by the STA) of the STA2 in the interference symbol set in the corresponding symbol/slot to obtain the CSI between the STA2 and the STA2 in the interference set.
  • STA1 is the symbol/time slot of the uplink measurement pilot information that STA2 sends to STA1 in the interference set.
  • STA1 measures the CSI between the interference set STA2 and the interference set STA2 through the UL pilot signal when receiving the cross-slot interference.
  • Gp in the downlink receiver of STA1, it will receive the cross-slot interference signal (actually the uplink transmission signal of STA2 in the neighbor interference set, the uplink transmission signal includes the uplink demodulation pilot signal, which can be based on the uplink solution
  • the pilot signal estimates the uplink channel of the interference signal, which in turn results in CSI with STA2 in the interference set.
  • STA1 When STA1 is in the downlink receiving state and the target STA2 is in the uplink sending state, STA1 reconstructs the cross-slot interference information caused by the target STA2 to the STA1 according to the CSI corresponding to the target STA2.
  • the target STA2 is any STA2 in the uplink transmission state in the interference set.
  • the target STA2 may also be a collective name of multiple STA2s in the uplink transmission state in the interference set.
  • target STA2 if STA1 and one STA2 of its interference set (referred to as target STA2) are simultaneously scheduled, and STA1 is in a downlink receiving state, and target STA2 is in an uplink sending state, target STA2 needs to share its sending data to STA1 through D2D. (eg Xi);
  • the STA1 reconstructs the cross-slot interference HliXi of the target STA2 to the STA1 by using the estimated channel Hli between the STA1 and the target STA2 and the transmission data Xi of the shared target STA2.
  • STA1 subtracts the cross-slot interference HliXi of the target STA2 in its downlink information Y1, and obtains downlink information ⁇ 1- ⁇ 1 ⁇ for eliminating cross-slot interference between STAs.
  • a wireless communication system does not use dynamic TDD, wherein the uplink and downlink switching points of each cell radio frame are fixed, but are not aligned with each other, the foregoing steps 301 to 304 may be used.
  • the method performs the elimination of cross-slot interference between MSs.
  • the method for eliminating cross-slot interference in this embodiment can effectively eliminate the dynamic TDD
  • the cross-slot interference between the STAs enables the dynamic TDD to effectively adapt to the advantages of the instantaneous volatility service, and improves the throughput and spectrum efficiency of the system.
  • FIG. 9A is a schematic structural diagram of a terminal according to an embodiment of the present invention. As shown in FIG. 9A, the terminal in this embodiment includes: a cross-slot interference reconstruction unit 41 and a cross-slot interference removal unit 42;
  • the cross-slot interference reconstruction unit 41 is configured to: when the terminal is in the downlink receiving state, and when the second terminal is in the uplink sending state, reconstruct the cross-slot interference caused by the second terminal to the terminal;
  • the terminal is a terminal in the interference set of the terminal;
  • the cross-slot interference removal unit 42 is configured to remove the cross-slot interference in the received downlink information after the cross-slot interference reconstruction unit 41 reconstructs the cross-slot interference, to obtain cross-slot interference cancellation. After the downlink information.
  • the cross-slot interference reconstruction unit 41 may be specifically used for the cross-slot interference reconstruction unit 41 .
  • the cross-slot interference reconstruction unit 41 may be specifically used for the cross-slot interference reconstruction unit 41 .
  • the cross-slot interference reconstruction unit 41 is specifically configured to
  • the D2D technology is used to obtain the uplink measurement pilot information of the second terminal in the uplink sending state
  • the cross-slot interference reconstruction unit 41 is specifically configured to
  • the CSI obtains a channel between the terminal and the second terminal
  • the terminal reconstructs the cross-slot interference caused by the second terminal to the terminal by using the cross-slot interference reconstruction unit, so that the cross-slot interference removal unit removes the cross in the received downlink information.
  • the time slot interference is obtained, and the downlink information after the cross-slot interference is eliminated is obtained, thereby eliminating the prior art.
  • the terminal shown in FIG. 9B may further include: a creating unit 40;
  • the creating unit 40 is configured to create an interference set of the terminal before the cross-slot interference reconstruction unit 41 reconstructs the cross-slot interference, where the interference set includes a neighboring cell in a cell where the terminal is located At least one second terminal.
  • the creating unit 40 is specifically used to
  • the second terminal served by the access point corresponding to the received power of the neighboring area in the D2D set is interfered with set.
  • the creating unit 40 is specifically used to create the creating unit 40
  • the second access service of the access point corresponding to the neighboring received power Pi in the D2D set is served.
  • the terminal constitutes a set of interference.
  • the creating unit 40 is further configured to periodically update the interference set after the interference set is created.
  • the terminal shown in FIG. 9B may further include: a sharing unit, where the sharing unit is configured to: after the creating unit 40 creates the interference set, The access point of the cell where the terminal is located sends the interference set, so that the access point of the cell where the terminal is located shares the interference set with the access point in the neighboring cell of the cell where the terminal is located.
  • a sharing unit configured to: after the creating unit 40 creates the interference set, The access point of the cell where the terminal is located sends the interference set, so that the access point of the cell where the terminal is located shares the interference set with the access point in the neighboring cell of the cell where the terminal is located.
  • the terminal creates an interference set by creating a unit, and then reconstructs the cross-slot interference caused by the second terminal to the terminal by using the cross-slot interference reconstruction unit, so that the cross-slot interference removal unit removes the cross in the received downlink information.
  • the time slot interference is obtained, and the downlink information after the cross-slot interference cancellation is obtained, thereby eliminating the cross-slot interference between the terminals in the prior art.
  • FIG. 10 is a schematic structural diagram of a terminal according to another embodiment of the present invention.
  • the terminal in this embodiment includes: a processor 0101, a memory 0201, and a bus 0301, between the processor 0101 and the memory 0201.
  • the processor 0201 is configured to store an instruction, and the processor 0101 executes the instruction, which specifically includes:
  • the terminal If the terminal is in the downlink receiving state, and the second terminal is in the uplink sending state, reconstructing the cross-slot interference caused by the second terminal to the terminal; the second terminal is the terminal in the interference set of the terminal;
  • the cross-slot interference is removed from the received downlink information, and downlink information after cross-slot interference cancellation is obtained.
  • the processor 0101 executes the instruction, where the method includes: creating, by using a D2D technology, an interference set of the terminal, where the interference set includes a neighboring cell in a cell where the terminal is located At least one second terminal;
  • the terminal If the terminal is in the downlink receiving state, and the second terminal is in the uplink sending state, reconfiguring the cross-slot interference caused by the second terminal in the uplink sending state to the terminal;
  • the cross-slot interference is removed from the received downlink information, and downlink information after cross-slot interference cancellation is obtained.
  • the processor 0101 creates the interference set of the terminal by using the D2D technology, and may include: sending the search information to all the second terminals in the preset range, and receiving the response of the second terminal according to the search information.
  • Information may include: sending the search information to all the second terminals in the preset range, and receiving the response of the second terminal according to the search information.
  • the second terminal group served by the access point corresponding to the received power of the neighboring cell in the D2D set is used. Into the interference set.
  • the foregoing processor is further configured to: after the interference set of the terminal is created by using a D2D technology, send the interference set to an access point of a cell where the terminal is located, so as to enable access of a cell where the terminal is located. Pointing the interference set to be shared with an access point in a neighboring cell of the cell in which the terminal is located
  • the processor is specifically configured to: create, by using a D2D technology, a interference set of the terminal, where the interference set includes at least one second terminal in a neighboring cell of the cell where the terminal is located;
  • the second terminal is in an uplink sending state, and acquires a CSI between the terminal and the second terminal in an uplink sending state;
  • the processor 0101 acquires uplink measurement pilot information of the second terminal in an uplink transmission state by using a D2D technology, and measures an uplink pilot signal of the second terminal according to the uplink measurement pilot information, to obtain a location.
  • the processor 0101 receives data sent by the second terminal by using the D2D technology, and obtains a channel between the first terminal and the second terminal according to CSI corresponding to the second terminal; And the data reconstructing cross-slot interference caused by the second terminal to the first terminal.
  • the above processor 0101 can perform any of the foregoing methods, and this embodiment is merely an example.
  • the terminal in the above embodiment can eliminate cross-slot interference between STAs in the prior art.
  • the aforementioned program can be stored in a computer readable storage medium.
  • the program when executed, performs the steps including the foregoing method embodiments; and the foregoing storage medium includes: a medium that can store program codes, such as a ROM, a RAM, a magnetic disk, or an optical disk.

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

Abstract

L'invention concerne un procédé pour éliminer un brouillage à ouverture en croix, et un terminal. Le procédé comprend les opérations suivantes : un premier terminal adopte la technique de dispositif à dispositif (D2D) pour créer un ensemble de brouillage du premier terminal, l'ensemble de brouillage comprenant au moins un second terminal dans une cellule voisine d'une cellule dans laquelle le premier terminal est situé ; si le premier terminal est dans un état de réception en liaison descendante et que le second terminal est dans un état d'envoi en liaison montante, alors le premier terminal reconstruit le brouillage à ouverture en croix du second terminal dans l'état d'envoi en liaison montante au premier terminal ; et le premier terminal élimine le brouillage à ouverture en croix des informations de liaison descendante reçues pour obtenir les informations de liaison descendante desquelles le brouillage à ouverture en croix a été éliminé. Le procédé peut éliminer un brouillage à ouverture en croix entre des terminaux dans l'état antérieur de la technique.
PCT/CN2014/072433 2013-06-21 2014-02-24 Procédé pour éliminer un brouillage à ouverture en croix, et terminal WO2014201875A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201310250631.4 2013-06-21
CN201310250631.4A CN104244261B (zh) 2013-06-21 2013-06-21 交叉时隙干扰消除的方法及终端

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016138664A1 (fr) * 2015-03-05 2016-09-09 Qualcomm Incorporated Coordination entre une macro-cellule et une petite cellule pour gérer le brouillage pour un système de duplexage souple
CN106412947B (zh) * 2015-07-31 2019-11-01 华为技术有限公司 一种干扰的消除方法和用户设备以及基站
CN110011771B (zh) * 2018-01-05 2020-07-10 中国移动通信有限公司研究院 一种信息传输方法、基站及网络管理单元
CN113114598B (zh) * 2021-04-08 2022-05-06 东南大学 一种动态tdd下消除交叉时隙干扰的多小区盲干扰对齐方法

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CN1555145A (zh) * 2003-12-24 2004-12-15 大唐移动通信设备有限公司 时分双工码分多址系统中使用交叉时隙资源的方法及装置
CN1980090A (zh) * 2005-11-30 2007-06-13 大唐移动通信设备有限公司 消除交叉时隙干扰的方法及装置
US20080064432A1 (en) * 2006-09-07 2008-03-13 Samsung Electronics Co., Ltd. Method and apparatus for removing interference from uplink signal in time division duplex (tdd) system

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Publication number Priority date Publication date Assignee Title
CN1555145A (zh) * 2003-12-24 2004-12-15 大唐移动通信设备有限公司 时分双工码分多址系统中使用交叉时隙资源的方法及装置
CN1980090A (zh) * 2005-11-30 2007-06-13 大唐移动通信设备有限公司 消除交叉时隙干扰的方法及装置
US20080064432A1 (en) * 2006-09-07 2008-03-13 Samsung Electronics Co., Ltd. Method and apparatus for removing interference from uplink signal in time division duplex (tdd) system

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