WO2014187410A1 - 一种软切换处理方法和装置 - Google Patents

一种软切换处理方法和装置 Download PDF

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Publication number
WO2014187410A1
WO2014187410A1 PCT/CN2014/079629 CN2014079629W WO2014187410A1 WO 2014187410 A1 WO2014187410 A1 WO 2014187410A1 CN 2014079629 W CN2014079629 W CN 2014079629W WO 2014187410 A1 WO2014187410 A1 WO 2014187410A1
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Prior art keywords
cell
uplink
downlink
message
soft
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PCT/CN2014/079629
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English (en)
French (fr)
Inventor
詹建明
Original Assignee
中兴通讯股份有限公司
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Priority to EP14800646.3A priority Critical patent/EP3089517B1/en
Publication of WO2014187410A1 publication Critical patent/WO2014187410A1/zh

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Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W36/00Hand-off or reselection arrangements
    • H04W36/0005Control or signalling for completing the hand-off
    • H04W36/0055Transmission or use of information for re-establishing the radio link
    • H04W36/0069Transmission or use of information for re-establishing the radio link in case of dual connectivity, e.g. decoupled uplink/downlink
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W36/00Hand-off or reselection arrangements
    • H04W36/04Reselecting a cell layer in multi-layered cells
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W36/00Hand-off or reselection arrangements
    • H04W36/24Reselection being triggered by specific parameters
    • H04W36/32Reselection being triggered by specific parameters by location or mobility data, e.g. speed data
    • H04W36/324Reselection being triggered by specific parameters by location or mobility data, e.g. speed data by mobility data, e.g. speed data
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02DCLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00Reducing energy consumption in communication networks
    • Y02D30/70Reducing energy consumption in communication networks in wireless communication networks

Definitions

  • the present invention relates to the field of mobile communications, and in particular, to a soft handover processing method and apparatus. Background technique
  • the uplink and downlink service link imbalance of the user may occur, which may result in limited uplink coverage of some cells, lower uplink macro diversity gain, and even no uplink macro diversity.
  • the gain, even the user dropped calls, the traffic of the uplink and downlink data is very low, or the handover fails. It also interferes with the service experience of users in the balanced area of the uplink and downlink service links.
  • pilot configurations of some cells in the network planning are different, and some of the pilot configurations of the cells are larger or smaller than the pilots of the neighboring cells;
  • the low-power base station is added to the macro cell coverage area to meet the traffic demand of the hot spot or the blind spot, because the power of the low-power base station is too different from the power of the macro base station, but the low-power base station
  • the receiving sensitivity is equal to or less than the receiving sensitivity of the macro base station, resulting in a large uplink and downlink service link unbalanced area in the edge area of the low power base station.
  • FIG. 1 is a schematic diagram of uplink and downlink service link imbalance of a UMTS Hetnet network, where an uplink boundary refers to an uplink of a user terminal (UE) to a macro cell and a low power cell at the boundary location.
  • UE user terminal
  • the downlink boundary is that the macro cell pilot received by the UE is equal to the received low power cell pilot at the boundary location; the soft handover region is an area based on the measurement of the downlink pilot size, in the soft handover region.
  • the UE has a radio link with the macro cell and the low power cell at the same time; the unbalanced area means that the macro cell pilot power received by the UE at the uplink boundary is greater than the received low power cell pilot power by DU (dB).
  • the transmit power of the UE at the downlink UE received by the low power cell is greater than the transmit signal power of the UE at the downlink UE received by the macro cell by DU (dB).
  • the embodiments of the present invention provide a soft handover processing method and apparatus.
  • the embodiment of the present invention provides a soft handover processing method, which divides an extended soft handover region between a macro cell and a low power cell into an uplink soft combining gain region and a downlink soft combining gain region, where the method includes:
  • the radio network controller Receiving, by the radio network controller, the event measurement report reported by the user terminal UE, according to the event measurement report, determining that the UE enters the uplink soft combining gain zone from the macro cell, and enters the downlink soft combining gain zone from the uplink soft combining gain zone, From the downlink soft combining gain zone to the low power cell, from the low power cell to the downlink soft combining gain zone, and from the downlink soft combining gain When the zone enters the uplink soft combining gain zone or enters the macro cell from the uplink soft combining gain zone, the corresponding soft handoff strategy is respectively performed.
  • the embodiment of the present invention further provides a soft handover processing apparatus, where the extended soft handover area between the macro cell and the low power cell is divided into an uplink soft combining gain zone and a downlink soft combining gain zone, and the apparatus includes:
  • the receiving module is configured to receive an event measurement report reported by the user terminal UE;
  • the processing module is configured to determine, according to the event measurement report, that the UE enters an uplink soft combining gain zone from a macro cell, enters a downlink soft combining gain zone from an uplink soft combining gain zone, and enters a low power cell from a downlink soft combining gain zone.
  • the low-power cell enters the downlink soft combining gain region, enters the uplink soft combining gain region from the downlink soft combining gain region, or enters the macro cell from the uplink soft combining gain region, respectively, the corresponding soft switching strategy is executed.
  • a soft handover processing method and apparatus divides an extended soft handover region into an uplink soft combining gain region (also referred to as an uplink macro diversity and gain region) and a downlink soft combining gain region (also referred to as The downlink macro diversity combining and gain region) performs a corresponding soft handover strategy based on the divided uplink soft combining gain region and the downlink soft combining gain region.
  • an uplink soft combining gain region also referred to as an uplink macro diversity and gain region
  • the downlink macro diversity combining and gain region performs a corresponding soft handover strategy based on the divided uplink soft combining gain region and the downlink soft combining gain region.
  • FIG. 1 is a schematic diagram of an uplink and downlink service link imbalance of a UMTS Hetnet network
  • FIG. 2 is a schematic diagram of a soft handover of an unbalanced area boundary triggered by configuring a low power base station cell CIO to extend a soft handover area according to an embodiment of the present invention
  • FIG. 3 is a schematic diagram of the soft handover of the unbalanced area boundary triggered by the enhanced low power base station cell pilot power extension soft handover area according to an embodiment of the present invention
  • FIG. 4 is a schematic diagram of an area triggering soft handover in a direction toward a macro cell other than an unbalanced area boundary by enhancing a low power base station cell pilot power extension soft handover area according to an embodiment of the present invention
  • FIG. 5 is a schematic diagram of a handover area division example of a UE moving from a macro cell to a low power cell according to an embodiment of the present invention
  • FIG. 6 is a schematic diagram of a second example of a handover area division process in which a UE moves from a macro cell to a low power cell according to an embodiment of the present invention
  • FIG. 7 is a schematic diagram of a handover area division case in which a UE moves from a low power cell to a macro cell according to an embodiment of the present invention
  • FIG. 8 is a schematic diagram of a second example of a handover area division process in which a UE moves from a low power cell to a macro cell according to an embodiment of the present invention
  • FIG. 9 is a schematic diagram of a relationship between an uplink and downlink channel and a macro cell and a low power cell when a UE merges a gain region in an uplink from a macro cell to a low power cell according to an embodiment of the present invention
  • FIG. 10 is an embodiment of the present invention
  • FIG. 11 is a moving from the macro cell to the low in the embodiment of the present invention
  • the relationship between the uplink and downlink channels of the UE in the downlink combining the gain zone and the macro base station and the low power RRU;
  • FIG. 10 is an embodiment of the present invention
  • FIG. 11 is a moving from the macro cell to the low in the embodiment
  • FIG. 12 is a process of moving from the macro cell to the low power cell in the embodiment of the present invention, where the UE is in the process
  • FIG. 13 is a schematic diagram of the relationship between the uplink and downlink channels and the macro base station and the low power base station when the downlink combining the gain regions are performed
  • FIG. 13 is a schematic diagram of the UE moving in the downlink combining gain region during the process of moving from the low power cell to the macro cell in the embodiment of the present invention
  • FIG. 14 is a process of moving from a low power cell to a macro cell in the embodiment of the present invention, FIG.
  • FIG. 15 is a flowchart of a soft handover processing method according to an embodiment of the present invention.
  • FIG. 15 is a schematic diagram of a relationship between an uplink and downlink channel and a macro base station and a low power base station when a UE combines a gain region;
  • 16 is a schematic flowchart of a process for a UE to trigger a 1A event measurement report from a macro cell to a low power cell according to an embodiment of the present invention
  • FIG. 17 is a schematic diagram of a processing flow of a UE triggering a 1D event measurement report from a macro cell to a low power cell according to an embodiment of the present invention
  • FIG. 18 is a schematic diagram of a UE triggering a 1B event from a macro cell to a low power cell according to an embodiment of the present invention. Schematic diagram of the processing flow of the measurement report;
  • FIG. 19 is a schematic flowchart of a process for a UE to trigger a 1A event measurement report from a low power cell to a macro cell according to an embodiment of the present invention
  • FIG. 20 is a schematic diagram of a processing flow of a UE triggering a 1D event measurement report from a low power cell to a macro cell according to an embodiment of the present invention
  • FIG. 21 is a schematic flowchart of a process for a UE to trigger a 1B event measurement report from a low power cell to a macro cell according to an embodiment of the present invention
  • FIG. 22 is a schematic diagram of an uplink and downlink service connection of a UE in a macro cell according to an embodiment of the present invention
  • FIG. 23 is a schematic diagram of an uplink and downlink service connection after a UE moves from a macro cell to a low power cell and enters an uplink merged area according to an embodiment of the present invention
  • FIG. 24 is a schematic diagram of an uplink and downlink service connection after a UE moves from a macro cell to a low power cell and enters a downlink merged area according to an embodiment of the present disclosure
  • 25 is a schematic diagram of uplink and downlink service connections after a UE moves from a macro cell to a low power cell and enters a low power cell according to an embodiment of the present invention
  • FIG. 26 is a schematic diagram of an uplink and downlink service connection of a UE in a low-power cell according to an embodiment of the present invention
  • FIG. 27 is a schematic diagram of uplink and downlink service connections after a UE moves from a low-power cell to a macro cell and enters a downlink merged area according to an embodiment of the present invention
  • FIG. 28 is a schematic diagram of an uplink and downlink service connection after a UE moves from a low power cell to a macro cell and enters an uplink merged area according to an embodiment of the present disclosure
  • FIG. 29 is a schematic diagram of an uplink and downlink service connection after a UE moves from a low power cell to a macro cell and enters a macro cell according to an embodiment of the present invention. detailed description
  • the embodiment of the present invention extends the soft handover area according to the size of the uplink and downlink service link imbalance area. A variety of methods for extending the soft handoff area can be used.
  • FIG. 2 is a schematic diagram of extending a soft handoff zone by adjusting a low power zone independent offset parameter (CIO);
  • CIO low power zone independent offset parameter
  • P-CPICH Primary Common Pilot Channel
  • P-CCPCH Primary Common Control Physical channel
  • the schematic diagram is such that the soft handover area boundary close to the macro base station side is the same as the uplink boundary of the unbalanced area; the P-CPICH transmission power of the low power cell is enhanced by adjusting the low power cell CIO and the enhanced low power base station cell is enhanced as shown in FIG. 4 .
  • a low power node (LPN, Low Power Node, ie low power base station) downlink service related physical channel transmit power is virtual
  • a common pilot channel (Virtual P-CPICH) as a reference base power, primary common pilot channel (P-CPICH) transmit power is increased by an increment, increment size Delta (dB).
  • the extended soft handoff area enables users in the unbalanced area to receive the uplink service of the low power cell
  • the maximum output power of the macro cell is 20 W
  • the low power base station has a lower transmit power per carrier.
  • 2.5W or 1.25W which results in a large difference between the uplink and downlink service imbalance areas, such as 9dB or 12dB, so that the soft switching area has a range of 9dB or 12dB.
  • the WCDMA WCDMA
  • WCDMA Wideband Code Division Multiple Access
  • the embodiment of the present invention proposes to re-divide the extended soft handover region, and divide the extended soft handover region into an uplink soft combining gain region (also referred to as an uplink macro diversity and gain region) and a downlink soft combining gain region (also referred to as the downlink macro diversity combining and gain region), the boundary between the uplink soft combining gain region and the downlink soft combining gain region is distinguished by soft handover measurement report event processing.
  • an uplink soft combining gain region also referred to as an uplink macro diversity and gain region
  • a downlink soft combining gain region also referred to as the downlink macro diversity combining and gain region
  • the uplink soft combining gain zone is an area in which the macro cell and the low power cell can receive the uplink signal of the UE in a certain area in the uplink direction, and perform selective combining to generate the gain of the uplink signal; the downlink soft combining gain zone
  • the macro cell and the low-power cell send downlink signals to UEs in a certain area in the downlink direction, and combine them on the UE side to generate an area of downlink signal gain.
  • the soft handover process is divided into the uplink soft combining gain region and the downlink soft combining gain region, as shown in FIG. 5 and FIG. 6.
  • the soft handover boundary of the 1A event experienced by the user moving from the macro cell to the low power cell is the same as the uplink boundary between the macro cell and the low power cell, and the uplink soft combining gain region is used.
  • the user, the macro cell and the low-power cell can receive the uplink signal and perform soft combining to generate the uplink gain, thereby improving the system performance of the network.
  • the user in the downlink soft combining gain zone simultaneously receives the downlink signal of the macro cell and the low-power cell and performs the downlink signal.
  • Soft combining produces a downstream gain that improves the system performance of the network.
  • FIG. 6 shows that the soft handover boundary of the 1A event experienced by the user moving from the macro cell to the low power cell is different from the uplink boundary between the macro cell and the low power cell; compared with FIG. 5, FIG. 6 is advanced.
  • Soft handover occurs in the area where the uplink boundary is toward the macro cell, so that more users in the macro cell can enjoy the gain of the uplink soft combining of the macro cell and the low power cell, thereby improving the system performance of the network, and the downlink soft combining gain region
  • the user simultaneously receives the downlink signals of the macro cell and the low power cell and performs soft combining to generate downlink gain, thereby improving system performance of the network.
  • the soft handoff process is divided into an uplink soft combining gain zone and a downlink soft combining gain zone, see FIG. 7 and FIG. 7 shows that the 1B event soft handover boundary experienced by the user moving from the macro cell to the low power cell is the same as the uplink boundary between the macro cell and the low power cell, and the macro soft combining gain zone user, the macro cell
  • Both the low-power cell and the low-power cell can receive the uplink signal and perform soft combining to generate the uplink gain, thereby improving the system performance of the network.
  • the user in the downlink soft combining gain region simultaneously receives the downlink signals of the macro cell and the low-power cell and performs soft combining to generate Downstream gain improves system performance of the network.
  • FIG. 8 shows that the soft handover boundary of the 1B event experienced by the user moving from the macro cell to the low power cell is different from the uplink boundary between the macro cell and the low power cell; compared with FIG. 7, FIG. 8 is a UE. Delayed to 1B event soft handover in the area where the uplink boundary is toward the macro cell, so that more users in the macro cell can enjoy the gain of the uplink soft combining of the macro cell and the low power cell, improve the system performance of the network, and soften the gain in the downlink.
  • the user of the zone simultaneously receives the downlink signals of the macro cell and the low power cell and performs soft combining to generate downlink gain, thereby improving system performance of the network.
  • the uplink soft combining gain zone for the uplink service, the macro cell and the low power cell are processed for the R99 uplink service and the High Speed Uplink Packet Access (HSUPA) service. See Figure 9 and Figure. 10.
  • HSUPA High Speed Uplink Packet Access
  • FIG. 9 shows an uplink and downlink channel processing manner of the macro cell and the low power cell after the user enters the uplink soft combining gain region by triggering the 1A event measurement report when the user moves from the macro cell to the low power cell.
  • both the macro cell and the low-power cell receive the uplink signal of the area, and process the E-DCH Dedicated Physical Data Channel (E-DCH Dedicated Physical Data Channel), and the E-DCH Dedicated Physical Control Channel (E-DCH) -DPCCH, E-DCH Dedicated Physical Control Channel), Dedicated Physical Data Channel (DPDCH), dedicated physical control channel (DPCCH), and soft combining processing to generate uplink gain;
  • the macro cell transmits a high-speed physical downlink shared channel to the regional UE (HS-PDSCH, High Speed Physical Downlink Shared Channel), High-Share Shared Control Channel (HS-SCCH), DPDCH, DPCCH channel signal, low-power cell does not transmit HS-PDSCH, HS-SCCH, DPD
  • HS-PDSCH High
  • FIG. 10 shows an uplink and downlink channel processing manner of a macro cell and a low power cell after the user enters the uplink soft combining gain region by triggering the 1D event measurement report when the user moves from the low power cell to the macro cell, and the macro cell of FIG. 10
  • the uplink and downlink channel processing manners with the low power cells are the same as the uplink and downlink channel processing modes of the macro cell and the low power cell of FIG. 9 .
  • Both the macro cell and the low power cell receive the uplink E-DPDCH/E-DPCCH/DPDCH/DPCCH signals and implement selective soft combining or maximum ratio soft combining. If the physical base station configuration of the low power cell is a low power base station, then the selective soft combining is performed in the Radio Network Controller (RNC), if the low power cell is a radio remote unit (RRU) connected to the macro The cell, then the maximum ratio soft combining is done at the macro base station side baseband processing.
  • RNC Radio Network Controller
  • RRU radio remote unit
  • FIG. 9 shows an uplink and downlink channel processing manner of a macro cell and a low power cell after the user enters the uplink soft combining gain zone when moving from the macro cell to the low power cell
  • FIG. 10 shows when the user moves from the low power cell to the low power cell.
  • the low power cell does not transmit data signals on the dedicated data channel DPDCH, but the low power cells transmit associated control or feedback signals on the downlink dedicated control channel DPCCH (or F-DPCH) or E-HICH/E-RGCH channel.
  • high speed downlink shared channel (HS-DSCH, High The service cell and the Enhanced Dedicated Channel (E-DCH) serving cell are both macro cells.
  • E-DCH Enhanced Dedicated Channel
  • the macro cell and the low power cell are processed for the R99 downlink service and the HSDPA service, as shown in FIG. 11, FIG. 12, FIG. 13, and FIG.
  • FIG. 11 and FIG. 12 show uplink and downlink channel processing modes of the macro cell and the low power cell after the user enters the downlink soft combining gain zone by triggering the 1D event measurement report when the user moves from the macro cell to the low power cell.
  • Figure 11 is a diagram showing the uplink and downlink channel processing in the case where the physical device corresponding to the low-power cell is a radio remote module.
  • the macro cell receives the HS-DPCCH and DPCCH uplink signals of the UE in the area, and does not receive the signal.
  • E-DPDCH, E-DPCCH, DPDCH uplink channel signals, low-power cells do not receive HS-DPCCH uplink channel signals, receive E-DPDCH, E-DPCCH, DPDCH, DPCCH uplink channel signals; in terms of downlink channels, macro cells and low
  • the power cell transmits the DPDCH and DPCCH channel signals to the UE in the area, and the UE performs downlink combining on the received DPDCH and DPCCH signals.
  • the low-power cell transmits the E-RGCH and E-HICH downlink channel signals to the regional UE, and the macro cell
  • the E-AGCH and E-RGCH downlink channel signals are transmitted to the regional UE, and the E-RGCH and E-AGCH signal content are forwarded by the low-power cell through the transmission interface between the macro base station and the low-power radio remote module.
  • Figure 12 is a diagram showing the uplink and downlink channel processing in the case where the physical device corresponding to the low-power cell is a low-power base station.
  • the macro cell receives the HS-DPCCH and DPCCH uplink signals of the UE in the area, and does not receive E.
  • -DPDCH, E-DPCCH, DPDCH uplink channel signal, low power cell does not receive HS-DPCCH uplink channel signal, receives E-DPDCH, E-DPCCH, DPDCH, DPCCH uplink channel signal; in the downlink channel, macro cell and low power
  • the cell transmits the DPDCH and DPCCH channel signals to the UE in the area, and the UE performs downlink combining on the received DPDCH and DPCCH signals.
  • the low-power cell transmits the E-RGCH and E-HICH downlink channel signals to the regional UE.
  • the macro cell transmits an E-AGCH downlink channel signal to the regional UE,
  • the E-AGCH signal content is forwarded by the low power cell through a transmission interface between the macro base station and the low power base station.
  • FIG. 13 and FIG. 14 show the uplink and downlink channel processing modes of the macro cell and the low power cell after the user enters the downlink soft combining gain region by triggering the 1A event measurement report when the user moves from the low power cell to the macro cell.
  • the uplink and downlink channel processing manner of FIG. 13 is the same as the uplink and downlink channel processing manner of FIG. 11, and the uplink and downlink channel processing manner of FIG. 14 is the same as the uplink and downlink channel processing manner of FIG.
  • both the macro cell and the low-power cell transmit signals on the downlink dedicated channel DPCH (including DPDCH and DPCCH), so that the UE side downlink receives two downlink signals for soft combining, where the low-power cell targets
  • DPCH downlink dedicated channel
  • TPC transmit power control
  • the macro cell is also the HS-DSCH serving cell of the UE in the area, so the high-speed physical downlink shared channel (HS-PDSCH, Shared Speed Control Shared Channel), HS-DSCH shared control channel (HS-SCCH, Shared Control)
  • HS-PDSCH High-speed physical downlink shared channel
  • HS-SCCH HS-DSCH shared control channel
  • the channel for HS-DSCH and the F-DPCH are transmitted on the macro cell, where the low-power cell does not transmit the F-DPCH channel power for the UE in the downlink soft combining gain region.
  • the macro cell does not receive the uplink dedicated channel DPDCH signal, and the low power cell receives the uplink dedicated channel DPDCH signal; for the HSUPA service, the macro cell does not receive the uplink E-DPDCH
  • the low-power cell receives the uplink E-DPDCH signal, and the macro cell sends an E-DCH Absolute Grant Channel (E-AGCH) to the UE.
  • E-AGCH E-DCH Absolute Grant Channel
  • the low-power base station is a radio remote module (RRU)
  • the macro cell may also send an E-RGCH to the UE (see FIG.
  • a soft handover processing method is provided in the embodiment of the present invention, and the extended soft handover region between the macro cell and the low power cell is divided into an uplink soft combining gain region and a downlink soft combining gain region, as shown in FIG.
  • the methods mainly include:
  • Step 001 The RNC receives an event measurement report reported by the UE.
  • Step 002 According to the event measurement report, determining that the UE enters an uplink soft combining gain region from a macro cell, enters a downlink soft combining gain region from an uplink soft combining gain region, and enters a low power cell from a downlink soft combining gain region.
  • the low-power cell enters the downlink soft combining gain zone, enters the uplink soft combining gain zone from the downlink soft combining gain zone, or enters the macro cell from the uplink soft combining gain zone, respectively performs corresponding soft handoff strategies.
  • the soft handoff strategy performed is:
  • the NC sends a radio link setup request message to the base station of the low power cell, where the message includes a parameter for invalidating the downlink dedicated physical data channel (DPDCH);
  • DPDCH downlink dedicated physical data channel
  • the NC initiates an active set update procedure to the UE, informing the UE to add the low power cell to the active set.
  • the initial condition is that the UE has only uplink and downlink service connections with the macro cell, and the UE has no uplink and downlink service connection with the low power cell, as shown in FIG. 22; the UE moves from the macro cell to the low power cell to trigger the processing flow of the 1A event measurement report, such as As shown in Figure 16, it mainly includes:
  • step 1601 the UE reports the 1A event measurement report to the RNC when the UE moves from the macro cell to the low-power cell and passes the 1A event reporting boundary shown in FIG. 22;
  • Step 1602 1603 the NC initiates a radio link setup process to the low-power base station, and the low-power base station returns a radio link setup response to the RNC.
  • the radio link setup request message includes a parameter for invalidating the downlink DPDCH channel, and the low-power cell is configured.
  • the established radio link (adio Link) does not transmit DPDCH data to the UE;
  • Step 1604 the NC initiates an activation set update process to the UE, and notifies the UE to add the low-power cell to the active set.
  • Step 1605 The UE adds the low power cell to the active set, and returns an active set update complete message to the RNC.
  • the uplink service of the UE is received in both the macro cell and the low-power cell, and finally the soft combining process is performed.
  • the UE only receives the downlink service of the macro cell, and the low-power cell does not send the downlink service to the UE, refer to the relationship between the uplink and downlink services of the UE and the macro cell and the low power cell shown in FIG.
  • the soft handover strategy performed is:
  • the NC sends a radio link reconfiguration preparation message to the base station of the low power cell, where the message includes a parameter for making the downlink DPDCH valid and a notification forwarding absolute authorization;
  • the NC sends a radio link reconfiguration preparation message to the base station of the macro cell, where the message includes setting a parameter for transmitting an absolute grant and enabling an uplink enhanced dedicated physical data channel (E-DPDCH), an enhanced dedicated physical control channel (E-DPCCH), and an uplink.
  • E-DPDCH enhanced dedicated physical data channel
  • E-DPCCH enhanced dedicated physical control channel
  • the NC sends a new measurement control message to the UE, and the Rib parameter and the Hlb parameter of the event measurement report are modified in the message, so that the UE moves to the downlink traffic boundary between the macro cell and the low power cell to report the corresponding 1B event measurement report.
  • the processing flow of the UE triggering the 1D event measurement report from the macro cell to the low power cell, as shown in FIG. 17, mainly includes:
  • Step 1701 When the UE moves from the macro cell to the low-power cell, the 1D event measurement report is reported to the RNC when the boundary is reported by the 1D event shown in FIG. 21;
  • Step 1702 the RNC initiates a radio link reconfiguration process to the low power base station, and the low power
  • the base station returns a radio link reconfiguration response to the RNC.
  • the radio link reconfiguration preparation message includes a parameter for enabling the downlink DPDCH channel to be valid and a notification forwarding absolute grant, so that the low power cell reconfigures the radio link (adio Link). Transmitting DPDCH data to the UE and forwarding the uplink absolute grant content for the UE to the macro cell;
  • Step 1704 the NC sends a radio link reconfiguration commit message to the low power base station.
  • Step 1705 The RNC initiates a radio link reconfiguration preparation process to the macro base station, where the radio link reconfiguration preparation message includes setting a parameter for transmitting an absolute grant and invalidating the uplink E-DPDCH/E-DPCCH/UL DPDCH channel. a parameter, wherein the macro base station reconfigures the radio link (adio Link) to transmit an uplink grant AG forwarded by the low power base station to the UE, and the radio link does not receive the uplink E-DPDCH/E-DPCCH/UL DPDCH signal. ;
  • Step 1706 The NC sends a radio link reconfiguration commit message to the macro base station.
  • Step 1707 The RNC sends a new measurement control message to the UE, where the parameters of the 1B event measurement report thresholds R1b, Hlb are modified, so that the UE reports the 1B event measurement at the downlink service boundary between the macro cell and the low power cell. report.
  • the setting of the parameters of the 1B event measurement report Rlb, Hlb, etc. is determined according to the method of different extended area soft switching areas.
  • Soft switching is the principle ;).
  • the uplink service of the UE is received only in the low-power cell, but the UE receives the uplink absolute grant AG from the macro cell; both the macro cell and the low-power cell send the R99 service to the UE, and the macro cell The UE sends the HSDPA service.
  • the macro cell is still the UE
  • For the HS-DSCH serving cell and the E-DCH serving cell refer to the relationship between the uplink and downlink services of the UE and the macro cell and the low power cell shown in FIG.
  • the soft handover strategy performed is:
  • the NC sends a radio link reconfiguration preparation message to the base station of the low power cell, where the message includes high speed downlink shared channel (HS-DSCH) related information and enhanced absolute grant channel (E-AGCH) parameter information;
  • HS-DSCH high speed downlink shared channel
  • E-AGCH enhanced absolute grant channel
  • the NC sends a radio link reconfiguration preparation message to the base station of the macro cell, where the message includes deleting the HS-DSCH related information;
  • the physical channel reconfiguration process and the radio bearer reconfiguration process are completed between the NC and the UE, and the HS-DSCH serving cell and the E-DCH serving cell are changed to a low power cell;
  • the NC sends a new measurement control message to the UE, and the Rla parameter and the Hla parameter of the event measurement report are modified in the message, so that the UE reports the corresponding 1A event measurement report at the downlink service boundary between the macro cell and the low power cell.
  • Step 1801 after the processing flow shown in FIG. 17, when the UE continues to move to the low-power cell, the UE reports the 1B event measurement report to the RNC when the 1B event reporting boundary is shown in FIG. 22;
  • Step 1802 the RNC initiates a radio link reconfiguration process to the low power base station, where the radio link reconfiguration preparation message includes HS-DSCH related information and E-AGCH parameter information, so that the radio link of the low power cell supports the HS. - Processing and transmission of the DSCH and transmission of the E-AGCH channel.
  • Step 1803 the RNC initiates a radio link reconfiguration process to the macro cell, where the radio link is heavy.
  • the preparation preparation message includes deleting the HS-DSCH related parameters;
  • Step 1806 1809 the physical channel reconfiguration process and the radio bearer reconfiguration process are completed between the NC and the UE, and the HS-DSCH serving cell and the E-DCH serving cell are changed to the low power cell.
  • Step 1810 1813 the NC initiates an activation set update message to the UE, deletes the macro cell from the active set, and initiates an L deletion process by the RNC to the macro cell.
  • Step 1814 The RNC sends a new measurement control message to the UE, where the parameters of the 1A event measurement report thresholds Rla and Hla are modified in the measurement control message, so that the UE reports the 1A event measurement at the downlink service boundary between the macro cell and the low power cell. report.
  • the setting of the 1A event measurement report thresholds Rla, Hla, etc. is determined according to the method of different extended cell soft handover areas.
  • Soft switching is the principle ;).
  • the enhanced pilot for example, Figure 3 pilot power enhancement Delta dB
  • the UE only has a radio link relationship with the low-power cell, and the uplink and downlink services are only processed by the low-power cell.
  • the soft handover policy performed is:
  • the RNC sends a radio link setup request message to the base station of the macro cell, where the message includes parameters for invalidating the uplink E-DPDCH, the E-DPCCH, and the uplink DPDCH;
  • the NC initiates an activation set update message to the UE, informing the UE to add the macro cell to the active set;
  • the RNC sends a radio link reconfiguration preparation message to the base station of the macro cell, where the message includes the HS-DSCH related information and the transmission absolute grant parameter;
  • the NC also sends a radio link reconfiguration preparation message to the base station of the low power cell, where the message includes forwarding Absolutely authorized parameters and deletion of HS-DSCH related information;
  • the NC initiates a physical channel reconfiguration process and a radio 7 reconfiguration procedure to the UE, and completes the process of changing the HS-DSCH serving cell and the E-DCH serving cell, so that the HS-DSCH serving cell and the E-DCH serving cell are changed to the macro cell.
  • the initial condition is that the UE has only the uplink and downlink service connection with the low-power cell, and the UE does not have the uplink and downlink service connection with the macro cell, as shown in FIG. 26; if the UE is not moved from the macro cell to the low-power cell, then the UE should also Executing the foregoing step 1814, the RNC sends a new measurement control message to the UE, where the parameters of the 1A event measurement report threshold Rla, Hla are modified, so that the UE reports at the downlink boundary between the macro cell and the low power cell.
  • 1A event measurement report the processing flow of the UE triggering the 1A event measurement from the low power cell to the macro cell, as shown in FIG. 19, mainly includes:
  • Step 1901 When the UE moves from the low-power cell to the macro cell, moves to the 1A event reporting boundary shown in FIG. 26, and reports the 1A event measurement report to the RNC.
  • Step 1902 the RNC initiates a radio link setup process to the macro cell, where the radio link setup request message includes a parameter for invalidating the uplink E-DPDCH/E-DPCCH/UL DPDCH channel, and the macro base station reconfigures the radio link.
  • ( adio Link ) does not receive and process the uplink E-DPDCH/E-DPCCH/UL DPDCH signal;
  • Step 1903 The NC initiates an activation set update process to the UE, and notifies the UE to add the macro cell to the active set.
  • Step 1904 the UE adds the macro cell to the active set, and returns an active set update complete message to the RNC.
  • Steps 1905 ⁇ 1906 the NC initiates a radio link reconfiguration process to the macro cell, where the wireless chain
  • the road reconfiguration preparation message includes HS-DSCH related information and an absolute grant parameter.
  • the NC also initiates a radio link reconfiguration process to the low power cell, where the radio link reconfiguration preparation message includes parameters for forwarding absolute grants and related parameters for deleting the HS-DSCH.
  • Step 1909 1912 the NC initiates a physical channel reconfiguration process and a radio bearer reconfiguration process to the UE, and completes the process of changing the HS-DSCH serving cell and the E-DCH serving cell, so that the HS-DSCH serving cell and the E-DCH serving cell are changed to Macro cell.
  • the uplink service of the UE is only received in the low-power cell, but the UE receives the uplink absolute grant from the macro cell; both the macro cell and the low-power cell send the R99 service to the UE, and the macro cell sends the UE to the UE.
  • the HS-DSCH service cell and the E-DCH serving cell are changed to a macro cell. See FIG. 27 for the relationship between the uplink and downlink services of the UE and the macro cell and the low power cell.
  • the soft handover strategy performed is:
  • the NC sends a radio link reconfiguration preparation message to the base station of the low power cell, where the message includes a parameter for invalidating the downlink DPDCH channel;
  • the NC sends a radio link reconfiguration preparation message to the base station of the macro cell, where the message includes parameters for making the uplink E-DPDCH, the E-DPCCH, and the uplink DPDCH channel valid;
  • the NC sends a new measurement control message to the UE, and the Rib parameter and the Hlb parameter of the event measurement report are modified in the message, so that the UE reports the corresponding 1B event measurement report at the downlink service boundary between the macro cell and the low power cell.
  • the RNC initiates a radio link reconfiguration process to the low-power base station, where the radio link reconfiguration preparation message includes a parameter for invalidating the downlink DPDCH channel, so that the radio link (adio link) established by the low-power cell is not Transmitting DPDCH data to the UE;
  • step 2003 the RNC sends a radio link reconfiguration commit message to the low power base station.
  • Step 2005 the RNC sends a radio link reconfiguration commit message to the macro cell, so that the radio link established by the macro cell receives the UE uplink signal;
  • the RNC sends a new measurement control message to the UE, where the parameters of the 1B event measurement report thresholds R1b, Hlb are modified, so that the UE reports the 1B event measurement at the downlink service boundary between the macro cell and the low power cell. report.
  • the setting of the parameters of the 1B event measurement report Rlb, Hlb, etc. is determined according to the method of different extended area soft switching areas.
  • Rlb DU-CIO (where DU is a macro cell and a low power cell)
  • CIO is the cell independent offset parameter of the low power cell
  • Hlb is set according to the actual situation (to avoid frequent ping-pong soft handover as a principle;).
  • the UE only receives the downlink service of the macro cell, and the low-power cell does not send the downlink service to the UE, refer to the relationship between the uplink and downlink services of the UE and the macro cell and the low power cell shown in FIG.
  • the soft handoff strategy performed is:
  • the NC sends an active set update message to the UE, informing the UE to delete the low power cell from the active set;
  • the NC sends a radio link deletion message to the UE to delete the radio link between the UE and the low power cell.
  • the processing flow of the UE triggering the 1B event measurement report from the low power cell to the macro cell movement mainly includes:
  • Step 2101 after the process flow shown in FIG. 20, the UE continues to move the macro cell to the 1B event reporting boundary shown in FIG. 26, and reports the 1B event measurement report to the RNC;
  • Step 2102 ⁇ 2103 the NC initiates an activation set update process to the UE (actively deleting the low-power cell), and the UE returns an active set update complete message to the RNC.
  • Steps 2104 to 2105 the NC initiates a radio link deletion procedure to the UE, and the UE returns a radio link deletion response to the RNC.
  • the UE only has a radio link relationship with the macro cell, and the uplink and downlink services are only processed by the low-power cell. Referring to the uplink and downlink services of the UE and the macro-low power cell shown in FIG. relationship.
  • the embodiment of the invention further provides a soft handover processing apparatus, including:
  • a receiving module configured to receive an event measurement report reported by the UE;
  • the processing module is configured to determine, according to the event measurement report, that the UE enters an uplink soft combining gain zone from a macro cell, enters a downlink soft combining gain zone from an uplink soft combining gain zone, and enters a low power cell from a downlink soft combining gain zone.
  • the low-power cell enters the downlink soft combining gain region, enters the uplink soft combining gain region from the downlink soft combining gain region, or enters the macro cell from the uplink soft combining gain region, respectively, the corresponding soft switching strategy is executed.
  • the soft handover strategy performed is:
  • An activation set update procedure is initiated to the UE, informing the UE to add a low power cell to the active set.
  • the soft handover strategy performed is:
  • a radio link reconfiguration preparation message includes setting a parameter for transmitting an absolute grant, and enabling an uplink enhanced dedicated physical data channel E-DPDCH, an enhanced dedicated physical control channel E-DPCCH, and an uplink dedicated a parameter of the uplink DPDCH failure of the physical data channel;
  • the Rib parameter is modified to be 0; if the soft handover area is extended by using the CIO combined with the enhanced pilot, the modification is performed.
  • the Rib parameter is Delta, which is the increment of the transmit power of the P-CPICH for the common pilot channel.
  • a radio link reconfiguration preparation message includes the high-speed downlink shared channel HS-DSCH related information and the enhanced absolute grant channel E-AGCH parameter information; and transmitting the radio link reconfiguration preparation to the base station of the macro cell
  • the message includes deleting the HS-DSCH related information
  • the Rla parameter is modified to be 0; if the soft handover area is extended by using the CIO combined with the enhanced pilot, the modification is performed.
  • the Rla parameter is Delta, and the Delta is the increment of the P-CPICH transmit power of the common pilot channel.
  • the soft handover strategy performed is:
  • a radio link reconfiguration preparation message Transmitting, to the base station of the macro cell, a radio link reconfiguration preparation message, where the message includes HS-DSCH related information and transmitting an absolute grant parameter; the RNC also sending a radio link reconfiguration preparation message to the base station of the low power cell
  • the message includes parameters for forwarding absolute authorization and deleting HS-DSCH related information
  • the soft handover strategy performed is:
  • the Rib parameter is modified to be DU-CIO; if the soft handover area is extended by using the CIO combined with the enhanced pilot, the Rib parameter is modified to DU-CIO-Delta; the DU is a link signal difference between an uplink boundary and a downlink boundary between a macro cell and a low power cell, where the CIO is a cell independent offset parameter of a low power cell, and the delta is P - The increase in CPICH transmit power.
  • the soft handover policy performed is:
  • the receiving module in the foregoing embodiment may be implemented by a communication function chip of the soft switching processing device, and the processing module may be a central processing unit (CPU) of the soft switching processing device, and a processor (MPU, Micro Processing Unit), Digital Signal Processor (DSP) or Programmable Logic Array (FPGA, Field) - Programmable Gate Array) implementation.
  • CPU central processing unit
  • MPU Micro Processing Unit
  • DSP Digital Signal Processor
  • FPGA Field Programmable Gate Array
  • the embodiment of the present invention further provides a computer readable storage medium, the storage medium comprising a set of computer executable instructions, the instructions being used to execute the soft handover processing method according to the embodiment of the present invention.
  • each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may be separately used as one unit, or two or more units may be integrated into one unit;
  • the unit can be implemented in the form of hardware or in the form of hardware plus software functional units.
  • the foregoing storage medium includes: a mobile storage device, a read only memory (ROM, ead-Only Memory), a random access memory (RAM), a magnetic disk or an optical disk, and the like.
  • ROM read only memory
  • RAM random access memory
  • magnetic disk or an optical disk and the like.
  • the above-described integrated unit of the embodiment of the present invention may be stored in a computer readable storage medium if it is implemented in the form of a software function module and sold or used as a stand-alone product.
  • the technical solution of the embodiments of the present invention may be embodied in the form of a software product in essence or in the form of a software product.
  • the computer software product is stored in a storage medium and includes a plurality of instructions.
  • a computer device (which may be a personal computer, server, or network device, etc.) is implemented to perform all or part of the methods described in various embodiments of the present invention.
  • the foregoing storage medium includes: a mobile storage device, a ROM, a RAM, a disk Or a variety of media such as optical discs that can store program code.

Abstract

公开了一种软切换处理方法,将宏小区与低功率小区之间的扩展后的软切换区划分为上行软合并增益区和下行软合并增益区,该方法包括:无线网络控制器(RNC)接收用户终端(UE)上报的事件测量报告;根据所述事件测量报告,在判断所述UE从宏小区进入上行软合并增益区、从上行软合并增益区进入下行软合并增益区、从下行软合并增益区进入低功率小区、从低功率小区进入下行软合并增益区、从下行软合并增益区进入上行软合并增益区或从上行软合并增益区进入宏小区时,分别执行对应的软切换策略。还公开了一种软切换处理装置。

Description

一种软切换处理方法和装置 技术领域
本发明涉及移动通信领域, 尤其涉及一种软切换处理方法和装置。 背景技术
在 实 际 的通用 移动通信 系 统 ( UMTS, Universal Mobile Telecommunications System ) 网络部署中, 会发生用户的上下行业务链路不 平衡, 从而导致有些小区上行覆盖受限, 降低上行宏分集增益甚至没有上 行宏分集增益, 甚至导致用户掉话、 上下行数据业务流量非常低或者切换 失败, 也会干扰上下行业务链路平衡区域用户的业务体验。 而导致用户的 上下行业务链路不平衡的原因有多种情况, 例如:
1 ) 网络规划中有些小区的导频配置有差异, 有的小区导频配置比邻近 小区的导频大一些或小一些;
2 )由于网络中的基站设备生产批次不同或者新基站的接收灵敏度提升, 导致出现相邻的基站接收灵敏度相差较大;
3 )外界干扰导致下行链路覆盖变差或者上行链路覆盖变差;
4 )在某些用户热点地区或者盲区通过在宏小区覆盖区中增加低功率基 站来满足热点或盲区的业务需要, 由于低功率基站的功率相对于宏基站功 率相差太大, 但是低功率基站的接收灵敏度与宏基站的接收灵敏度相等或 者相差较小, 从而导致低功率基站的边缘区出现较大的上下行业务链路不 平衡区。
近几年移动宽带业务发展迅猛, 各种第三代合作伙伴计划(3GPP, The 3rd Generation Partnership Project )制式智能终端(手机、数据卡、 iPad等) 的数据业务井喷式应用直接导致热点地区数据流量以及各种基于移动互联 网应用的 APP应用呈现爆炸式增长趋势, 仅仅增强传统的宏小区性能很难 完全解决问题。 移动通信行业达成高度共识, 釆用在宏小区中部署同频的 低功率基站(例如 Micro、 Pico基站)来解决急速增长的数据流量以及各种 基于移动互联网应用的 APP应用需求, 这些低功率基站部署在宏小区中来 实现对热点的补充覆盖,形成宏小区与低功率小区共存的 Hetnet异构网络; 3GPP也立项研究 UMTS Hetnet, 重点解决上下行业务链路不平衡的问题。 如图 1所示,图 1为 UMTS Hetnet网络的上下行业务链路不平衡的示意图, 其中, 上行边界是指, 在该边界位置用户终端 (UE )到宏小区与到低功率 小区的上行路损相等; 下行边界是指,在该边界位置 UE接收到的宏小区导 频与接收到的低功率小区导频相等; 软切换区是基于测量下行导频大小判 决的区域, 在该软切换区域, UE 同时与宏小区和低功率小区有无线链路; 不平衡区是指,在上行边界的 UE接收到的宏小区导频功率比接收到的低功 率小区导频功率大 DU ( dB ), 或者, 低功率小区接收到的在下行边界 UE 的发射信号功率比宏小区接收到的在下行边界 UE 的发射信号功率大 DU ( dB )。 发明内容
为解决现有存在的技术问题, 本发明实施例提供一种软切换处理方法 和装置。
本发明实施例提供了一种软切换处理方法, 将宏小区与低功率小区之 间的扩展后的软切换区划分为上行软合并增益区和下行软合并增益区, 所 述方法包括:
无线网络控制器 RNC接收用户终端 UE上报的事件测量报告; 根据所述事件测量报告,在判断所述 UE从宏小区进入上行软合并增益 区、 从上行软合并增益区进入下行软合并增益区、 从下行软合并增益区进 入低功率小区、 从低功率小区进入下行软合并增益区、 从下行软合并增益 区进入上行软合并增益区或从上行软合并增益区进入宏小区时, 分别执行 对应的软切换策略。
本发明实施例还提供了一种软切换处理装置, 宏小区与低功率小区之 间的扩展后的软切换区被划分为上行软合并增益区和下行软合并增益区, 所述装置包括:
接收模块, 配置为接收用户终端 UE上报的事件测量报告;
处理模块, 配置为根据所述事件测量报告,在判断所述 UE从宏小区进 入上行软合并增益区、 从上行软合并增益区进入下行软合并增益区、 从下 行软合并增益区进入低功率小区、 从低功率小区进入下行软合并增益区、 从下行软合并增益区进入上行软合并增益区或从上行软合并增益区进入宏 小区时, 分别执行对应的软切换策略。
本发明实施例提供的一种软切换处理方法和装置, 将扩展后的软切换 区划分为上行软合并增益区 (也称为上行宏分集合并增益区)和下行软合 并增益区 (也称为下行宏分集合并增益区), 基于划分的上行软合并增益区 和下行软合并增益区执行相应的软切换策略。 如此, 在无需对传统 UMTS 终端升级的情况下, 避免了宏小区与低功率小区不必要的资源浪费, 从而 提升了 UMTS Hetnet网络的整体性能。 附图说明
图 1为 UMTS Hetnet网络的上下行业务链路不平衡的示意图; 图 2为本发明实施例中通过配置低功率基站小区 CIO扩展软切换区, 使得不平衡区边界触发软切换的示意图;
图 3 为本发明实施例中通过增强低功率基站小区导频功率扩展软切换 区, 使得不平衡区边界触发软切换的示意图;
图 4 为本发明实施例中通过增强低功率基站小区导频功率扩展软切换 区, 使得不平衡区边界以外的朝宏小区方向的区域触发软切换的示意图; 图 5为本发明实施例中 UE从宏小区移动到低功率小区过程的切换区域 划分案例一示意图;
图 6为本发明实施例中 UE从宏小区移动到低功率小区过程的切换区域 划分案例二示意图;
图 7为本发明实施例中 UE从低功率小区移动到宏小区过程的切换区域 划分案例一示意图;
图 8为本发明实施例中 UE从低功率小区移动到宏小区过程的切换区域 划分案例二示意图;
图 9为本发明实施例中从宏小区移动到低功率小区过程中, UE在上行 合并增益区时的上下行信道与宏小区和低功率小区之间的关系示意图; 图 10为本发明实施例中从低功率小区移动到宏小区过程中, UE在上 行合并增益区时的上下行信道与宏小区和低功率小区之间的关系示意图; 图 11 为本发明实施例中从宏小区移动到低功率小区过程中, UE在下 行合并增益区时的上下行信道与宏基站和低功率 RRU之间的关系示意图; 图 12为本发明实施例中从宏小区移动到低功率小区过程中, UE在下 行合并增益区时的上下行信道与宏基站和低功率基站之间的关系示意图; 图 13为本发明实施例中从低功率小区移动到宏小区过程中, UE在下 行合并增益区时的上下行信道与宏基站和低功率 RRU之间的关系示意图; 图 14为本发明实施例中从低功率小区移动到宏小区过程中, UE在下 行合并增益区时的上下行信道与宏基站和低功率基站之间的关系示意图; 图 15为本发明实施例的一种软切换处理方法的流程图;
图 16为本发明实施例中 UE从宏小区向低功率小区移动触发 1A事件 测量报告的处理流程示意图;
图 17为本发明实施例中 UE从宏小区向低功率小区移动触发 1D事件 测量报告的处理流程示意图;
图 18为本发明实施例中 UE从宏小区向低功率小区移动触发 1B事件 测量报告的处理流程示意图;
图 19为本发明实施例中 UE从低功率小区向宏小区移动触发 1A事件 测量报告的处理流程示意图;
图 20为本发明实施例中 UE从低功率小区向宏小区移动触发 1D事件 测量报告的处理流程示意图;
图 21为本发明实施例中 UE从低功率小区向宏小区移动触发 1B事件 测量报告的处理流程示意图;
图 22为本发明实施例中 UE在宏小区的上下行业务连接示意图; 图 23为本发明实施例中 UE从宏小区向低功率小区移动, 进入到上行 合并区域后的上下行业务连接示意图;
图 24为本发明实施例中 UE从宏小区向低功率小区移动, 进入到下行 合并区域后的上下行业务连接示意图;
图 25为本发明实施例中 UE从宏小区向低功率小区移动, 进入到低功 率小区后的上下行业务连接示意图;
图 26为本发明实施例中 UE在低功率小区的上下行业务连接示意图; 图 27为本发明实施例中 UE从低功率小区向宏小区移动, 进入到下行 合并区域后的上下行业务连接示意图;
图 28为本发明实施例中 UE从低功率小区向宏小区移动, 进入到上行 合并区域后的上下行业务连接示意图;
图 29为本发明实施例中 UE从低功率小区向宏小区移动, 进入到宏小 区后的上下行业务连接示意图。 具体实施方式
下面结合附图和具体实施例对本发明的技术方案进一步详细阐述。 为了让上下行业务链路不平衡区用户能够接受到低功率基站的服务, 本发明的实施例扩展软切换区, 根据上下行业务链路不平衡区的大小不同 可以釆用多种扩展软切换区的方法。
一种扩展软切换区的实施方式如图 2所示, 图 2为通过调整低功率小 区独立偏置参数 ( CIO ) 的方法来扩展软切换区的示意图;
另一种扩展软切换区的实施方式, 通过调整 CIO结合增强低功率小区 的主公共导频信道 ( P-CPICH, Primary Common Pilot Channel )发射功率和 增强低功率小区的广播信道(即主公共控制物理信道(P-CCPCH, Primary 其中,图 3所示的通过调整低功率小区 CIO结合增强低功率小区的 P-CPICH 发射功率和增强低功率小区的广播信道发射功率的方法来扩展软切换区的 示意图, 使得靠近宏基站侧的软切换区边界与不平衡区的上行边界相同; 图 4所示的通过调整低功率小区 CIO结合增强低功率小区的 P-CPICH发射 功率和增强低功率基站小区的广播信道发射功率的方法来扩展软切换区的 示意图, 使得软切换区范围包括了不平衡区的上行边界。 其中, 在增强低 功率基站小区的 P-CPICH的方法中,低功率节点( LPN, Low Power Node, 即低功率基站) 的下行业务相关物理信道发射功率以虚拟主公共导频信道 ( Virtual P-CPICH )的功率为参考基准, 主公共导频信道( P-CPICH )发射 功率增加了一个增量, 增量大小为 Delta ( dB )。
扩展软切换区虽然使得不平衡区的用户能够接受到低功率小区的上行 服务,但是在实际 UMTS Hetnet网络部署中,宏小区的最大输出功率是 20W, 低功率基站的每个载波发射功率较低, 比如 2.5W或 1.25W, 这样导致上下 行业务不平衡区相差比较大, 比如 9dB或 12dB, 这样, 软切换区有 9dB或 12dB范围。一般来讲,在用户中低速移动情况下,宽带码分多址( WCDMA, Wideband Code Division Multiple Access )上行两条链路或下行两条链路功率 相差 4~6dB以内时才可能有正增益, 而且上行两条链路或下行两条链路信 号功率相差越大, 增益就越小; 当上行两条链路或下行两条链路功率相差 大于 4~6dB时, 就是负增益了。 因此, 本发明实施例提出将扩展后的软切换区进行重新划分, 将扩展 后的软切换区划分为上行软合并增益区 (也称为上行宏分集合并增益区) 和下行软合并增益区 (也称为下行宏分集合并增益区), 上行软合并增益区 与下行软合并增益区的边界通过软切换测量报告事件处理来区分。 其中, 上行软合并增益区是指, 宏小区与低功率小区在上行方向都能够接收到某 区域的 UE的上行信号,并进行选择性合并从而产生上行信号的增益的区域; 下行软合并增益区是指,宏小区与低功率小区在下行方向都向某区域的 UE 发送下行信号, 并在 UE侧进行合并从而产生下行信号增益的区域。
具体的:
当用户从宏小区移动到低功率小区所经历的软切换过程中就划分为上 行软合并增益区和下行软合并增益区, 参见图 5和图 6。
其中, 图 5显示的是用户从宏小区移动到低功率小区过程中所经历的 1A事件软切换边界与宏小区和低功率小区之间的上行边界( UL boundary ) 相同, 针对上行软合并增益区用户, 宏小区与低功率小区都能够接收上行 信号并进行软合并从而产生上行增益, 提升网络的系统性能; 在下行软合 并增益区的用户同时接收到宏小区与低功率小区的下行信号并进行软合并 从而产生下行增益, 提升网络的系统性能。
图 6显示的是用户从宏小区移动到低功率小区过程中所经历的 1A事件 软切换边界与宏小区和低功率小区之间的上行边界不相同; 相比较图 5 而 言, 图 6是提前在上行边界朝向宏小区的区域发生软切换, 让宏小区中更 多的用户能够享受到到宏小区与低功率小区的上行软合并的增益, 从而提 升网络的系统性能, 在下行软合并增益区的用户同时接收到宏小区与低功 率小区的下行信号并进行软合并从而产生下行增益, 提升网络的系统性能。 当用户从低功率小区移动到宏小区所经历的软切换过程中就划分为上 行软合并增益区和下行软合并增益区, 参见图 7和图 8。 其中, 图 7显示的是用户从宏小区移动到低功率小区过程中所经历的 1B事件软切换边界与宏小区和低功率小区之间的上行边界相同, 针对上行 软合并增益区用户, 宏小区与低功率小区都能够接收上行信号并进行软合 并从而产生上行增益, 提升网络的系统性能; 在下行软合并增益区的用户 同时接收到宏小区与低功率小区的下行信号并进行软合并从而产生下行增 益, 提升网络的系统性能。
图 8显示的是用户从宏小区移动到低功率小区过程中所经历的 1B事件 软切换边界与宏小区和低功率小区之间的上行边界不相同; 相比较图 7 而 言, 图 8是 UE延迟到上行边界朝向宏小区的区域发生 1B事件软切换, 让 宏小区中更多的用户能够享受到宏小区与低功率小区的上行软合并的增益, 提升网络的系统性能, 在下行软合并增益区的用户同时接收到宏小区与低 功率小区的下行信号并进行软合并从而产生下行增益, 提升网络的系统性 能。 对于上行软合并增益区的用户, 在上行业务方面, 宏小区与低功率小 区针对 R99上行业务和高速上行链路分组接入( HSUPA, High Speed Uplink Packet Access )业务的处理方式参见图 9、 图 10。
其中,图 9示出了当用户从宏小区向低功率小区移动时通过触发 1A事 件测量报告而进入到上行软合并增益区后, 宏小区与低功率小区的上下行 信道处理方式。 在上行信道方面, 宏小区与低功率小区都接收该区域的上 行信号, 处理 E-DCH 专用物理数据信道(E-DPDCH, E-DCH Dedicated Physical Data Channel ), E-DCH 专用物理控制信道 ( E-DPCCH, E-DCH Dedicated Physical Control Channel )、专用物理数据信道( DPDCH, Dedicated Physical Data Channel ), 专用物理控制信道 ( DPCCH, Dedicated Physical Control Channel )信道并进行软合并处理从而产生上行增益; 在下行信道方 面, 宏小区向该区域 UE发射高速物理下行共享信道(HS-PDSCH, High Speed Physical Downlink Shared Channel )、 高速共享控制信道( HS-SCCH, Shared Control Channel for HS-DSCH ), DPDCH、 DPCCH信道信号, 低功 率小区不向该区域 UE发射 HS-PDSCH、 HS-SCCH, DPDCH、 DPCCH信 道信号, 仅仅发射 E-DCH相对授权信道( E-RGCH, E-DCH Relative Grant Channel ), E-DCH混合自动重传指示信道 ( E-HICH, E-DCH Hybrid ARQ Indicator Channel ), DPCCH 或部分专用物理信道 ( F-DPCH, Fractional Dedicated Physical Channel )信道信号。
图 10示出了当用户从低功率小区向宏小区移动时通过触发 1D事件测 量报告而进入到上行软合并增益区后, 宏小区与低功率小区的上下行信道 处理方式, 图 10的宏小区与低功率小区在上下行信道处理方式与图 9的宏 小区与低功率小区在上下行信道处理方式相同。
宏小区与低功率小区都接收上行 E-DPDCH/E-DPCCH/DPDCH/DPCCH 信号并实现选择性软合并或者最大比值软合并。 如果低功率小区的物理基 站形态是一个低功率基站,那么选择式软合并就在无线网络控制器( RNC, Radio Network Controller )完成,如果低功率小区是一个射频拉远单元( RRU ) 连接到宏小区, 那么最大比值软合并在宏基站侧基带处理完成。
对于上行软合并增益区的用户, 在下行业务方面, 宏小区与低功率小 区针对 R99下行业务和高速下行分组接入( HSDPA, High Speed Downlink Packet Access )业务的处理方式参见图 9、 图 10。 图 9示出了当用户从宏小 区向低功率小区移动时进入到上行软合并增益区后, 宏小区与低功率小区 的上下行信道处理方式; 图 10示出了当用户从低功率小区向宏小区移动时 进入到上行软合并增益区后, 宏小区与低功率小区的上下行信道处理方式。
低功率小区不在专用数据信道 DPDCH上发射数据信号,但是低功率小 区在下行专用控制信道 DPCCH (或 F-DPCH )或者 E-HICH/E-RGCH信道 上发射相关控制或反馈信号。
对于上行软合并增益区的用户, 高速下行共享信道(HS-DSCH, High Speed Downlink Shared Channel )服务小区与增强型专用信道(E-DCH, Enhanced Dedicated Channel )服务小区都是宏小区。 对于下行软合并增益区的用户, 在下行业务方面, 宏小区与低功率小 区针对 R99下行业务和 HSDPA业务的处理方式参见图 11、 图 12、 图 13 和图 14。
其中, 图 11和图 12示出了当用户从宏小区向低功率小区移动时通过 触发 1D事件测量报告而进入到下行软合并增益区后,宏小区与低功率小区 的上下行信道处理方式。 图 11是指在低功率小区所对应的物理设备是射频 拉远模块情况下的上下行信道处理情况, 在上行信道方面, 宏小区接收该 区域的 UE的 HS-DPCCH、 DPCCH上行信号,不接收 E-DPDCH、 E-DPCCH、 DPDCH上行信道信号, 低功率小区不接收 HS-DPCCH上行信道信号, 接 收 E-DPDCH、 E-DPCCH, DPDCH, DPCCH上行信道信号; 在下行信道方 面,宏小区与低功率小区都向该区域 UE发射 DPDCH、 DPCCH信道信号, UE对接收到的 DPDCH和 DPCCH信号进行下行合并, 另外, 低功率小区 向该区域 UE发射 E-RGCH、 E-HICH下行信道信号, 宏小区向该区域 UE 发射 E-AGCH和 E-RGCH下行信道信号, 该 E-RGCH、 E-AGCH信号内容 由低功率小区通过宏基站与低功率射频拉远模块之间的传输接口转发而来。
图 12是指在低功率小区所对应的物理设备是低功率基站情况下的上下 行信道处理情况,在上行信道方面,宏小区接收该区域的 UE的 HS-DPCCH、 DPCCH上行信号, 不接收 E-DPDCH、 E-DPCCH, DPDCH上行信道信号, 低功率小区不接收 HS-DPCCH上行信道信号,接收 E-DPDCH、 E-DPCCH, DPDCH, DPCCH 上行信道信号; 在下行信道方面, 宏小区与低功率小区 都向该区域 UE发射的 DPDCH、 DPCCH信道信号, UE对接收到的 DPDCH 和 DPCCH信号进行下行合并,另夕卜,低功率小区向该区域 UE发射 E-RGCH、 E-HICH下行信道信号, 宏小区向该区域 UE发射 E-AGCH下行信道信号, 该 E-AGCH信号内容由低功率小区通过宏基站与低功率基站之间的传输接 口转发而来。
图 13和图 14示出了当用户从低功率小区向宏小区移动时通过触发 1A 事件测量报告而进入到下行软合并增益区后, 宏小区与低功率小区的上下 行信道处理方式。 图 13的上下行信道处理方式与图 11 的上下行信道处理 方式相同, 图 14的上下行信道处理方式与图 12的上下行信道处理方式相 同。 需要说明的是, 对于 R99业务, 宏小区和低功率小区都在下行专用信 道 DPCH (包括 DPDCH和 DPCCH )发射信号, 使得 UE侧下行接收到两 路下行信号进行软合并, 其中, 低功率小区针对下行软合并增益区的 UE 的 DPCCH信道不发射发射功率控制 (TPC )命令;
对于 HSDPA业务, 宏小区还是该区域 UE的 HS-DSCH服务小区, 所 以高速物理下行共享信道 (HS-PDSCH , High Speed Physical Downlink Shared Channel ), HS-DSCH的共享控制信道(HS-SCCH, Shared Control Channel for HS-DSCH )、 F-DPCH在宏小区上发送, 其中低功率小区针对下 行软合并增益区的 UE不发射 F-DPCH信道功率。
对于下行软合并增益区的用户, 在上行业务方面, 对于 R99业务, 宏 小区不接收上行专用信道 DPDCH信号, 低功率小区接收上行专用信道 DPDCH信号; 对于 HSUPA业务, 宏小区不接收上行 E-DPDCH信号, 低 功率小区接收上行 E-DPDCH信号, 宏小区下发绝对授权 E-DCH绝对授权 信道(E-AGCH, E-DCH Absolute Grant Channel )给 UE, 如果低功率基站 是射频拉远模块(RRU ),宏小区还可以下发 E-RGCH给 UE (参见图 11 ), 其中宏小区下发的 E-AGCH信道或者 E-RGCH信道的内容来自低功率小区 通过宏小区和低功率小区之间的传输介质传输过来, 低功率小区发射 E-HICH反馈信道给 UE, 参见图 11、 图 12、 图 13和图 14。 本发明实施例提供的一种软切换处理方法, 将宏小区与低功率小区之 间的扩展后的软切换区划分为上行软合并增益区和下行软合并增益区, 如 图 15所示, 该方法主要包括:
步骤 001, RNC接收 UE上报的事件测量报告;
步骤 002, 根据所述事件测量报告, 在判断所述 UE从宏小区进入上行 软合并增益区、 从上行软合并增益区进入下行软合并增益区、 从下行软合 并增益区进入低功率小区、 从低功率小区进入下行软合并增益区、 从下行 软合并增益区进入上行软合并增益区或从上行软合并增益区进入宏小区时, 分别执行对应的软切换策略。
在一种实施方式中,在判断 UE从宏小区进入上行软合并增益区时,执 行的软切换策略为:
NC向低功率小区的基站发送无线链路建立请求消息, 消息中包括使 下行专用物理数据信道(DPDCH ) 失效的参数;
NC向 UE发起激活集更新过程, 通知 UE将低功率小区增加进入激 活集中。
下面举实例说明:
初始条件, UE只与宏小区有上下行业务连接, UE与低功率小区没有 上下行业务连接,如图 22所示; UE从宏小区向低功率小区移动触发 1A事 件测量报告的处理流程, 如图 16所示, 主要包括:
步骤 1601, UE从宏小区向低功率小区移动的过程中, 经过图 22所示 的 1A事件上报边界时, 上报 1A事件测量报告给 RNC;
步骤 1602 1603, NC向低功率基站发起无线链路建立过程, 低功率 基站向 RNC返回无线链路建立响应; 其中, 无线链路建立请求消息中包括 使下行 DPDCH信道失效的参数,让低功率小区所建立的该无线链路( adio Link ) 不发射 DPDCH数据给 UE; 步骤 1604, NC向 UE发起激活集更新过程, 通知 UE将低功率小区 增加进入激活集中;
步骤 1605, UE将低功率小区增加进入激活集中, 并向 RNC返回激活 集更新完成消息。
通过图 16所示流程处理后, UE的上行业务在宏小区和低功率小区都 得到接收并最终进行软合并处理, UE仅仅接收到宏小区的下行业务, 而低 功率小区没有发送下行业务给该 UE, 参见图 23所示 UE的上下行业务与 宏小区和低功率小区之间的关系。 在另一种实施方式中,在判断所述 UE从上行软合并增益区进入下行软 合并增益区时, 执行的软切换策略为:
NC向低功率小区的基站发送无线链路重配准备消息, 消息中包括使 下行 DPDCH有效的参数以及通知转发绝对授权;
NC向宏小区的基站发送无线链路重配准备消息, 消息中包括设置发 射绝对授权的参数以及使上行增强专用物理数据信道 ( E-DPDCH )、增强专 用物理控制信道( E-DPCCH )、 上行链路专用物理数据信道上行 DPDCH失 效的参数;
NC向 UE发送新的测量控制消息, 消息中修改事件测量报告的 Rib 参数和 Hlb参数, 使 UE移动到宏小区与低功率小区之间的下行业务边界 处上报相应的 1B事件测量报告。
下面举实例说明:
UE从宏小区向低功率小区移动触发 1D事件测量报告的处理流程, 如 图 17所示, 主要包括:
步骤 1701, UE从宏小区向低功率小区移动的过程中, 经过图 21所示 的 1D事件上报边界时, 上报 1D事件测量报告给 RNC;
步骤 1702 1703, RNC向低功率基站发起无线链路重配过程, 低功率 基站向 RNC返回无线链路重配好响应; 其中, 无线链路重配准备消息中包 括使下行 DPDCH信道有效的参数以及通知转发绝对授权,让低功率小区所 重配该无线链路 ( adio Link )发射 DPDCH数据给 UE以及将针对该 UE 的上行绝对授权内容转发给宏小区;
步骤 1704, NC向低功率基站发送无线链路重配提交消息;
步骤 1705, RNC向宏基站发起无线链路重配准备过程, 其中, 无线链 路重配准备准备消息中包括设置发射绝对授权的参数以及使上行 E-DPDCH/E-DPCCH/UL DPDCH信道失效的参数, 让宏基站所重配该无线 链路 ( adio Link )发射由低功率基站转发过来的上行授权 AG给 UE, 并 且该无线链路不接收处理上行 E-DPDCH/E-DPCCH/UL DPDCH信号;
步骤 1706, NC向宏基站发送无线链路重配提交消息;
步骤 1707, RNC向 UE发送新的测量控制消息, 该测量控制消息中修 改 1B事件测量报告门限 Rlb、 Hlb等参数, 使得 UE在宏小区与低功率小 区之间的下行业务边界处上报 1B事件测量报告。
其中, 1B事件测量报告门限 Rlb、 Hlb等参数的设置根据不同扩展小 区软切换区的方法来确定。
需要说明的是, 当仅仅釆用小区独立偏置参数 CIO来扩展软切换区时 (例如图 2 ),修改 1B事件测量报告门限参数使得 Rlb=0, Hlb根据实际实 际情况设置(以避免频繁乒乓软切换为原则;)。
当低功率小区釆用小区独立偏置参数 CIO, 另外还釆用增强导频来扩 展软切换区时(例如图 3导频功率增强 Delta dB ), 修改 IB事件测量报告 门限参数使得 Rlb=Delta, Hlb根据实际实际情况设置(以避免频繁乒乓软 切换为原则;)。
通过图 17所示流程处理后, UE的上行业务仅仅在低功率小区接收, 但是 UE接收来自宏小区的上行绝对授权 AG; 宏小区与低功率小区都向该 UE发送 R99业务,宏小区向该 UE发送 HSDPA业务。宏小区依然是该 UE 的 HS-DSCH服务小区和 E-DCH服务小区,参见图 24所示 UE的上下行业 务与宏小区和低功率小区之间的关系。 在另一种实施方式中,在判断所述 UE从下行软合并增益区进入低功率 小区时, 执行的软切换策略为:
NC向低功率小区的基站发送无线链路重配准备消息, 消息中包括高 速下行共享信道( HS-DSCH )相关信息以及增强绝对授权信道( E-AGCH ) 参数信息;
NC 向宏小区的基站发送无线链路重配准备消息, 消息中包括删除 HS-DSCH相关信息;
NC 与 UE之间完成物理信道重配过程与无线承载重配过程, 完成 HS-DSCH服务小区和 E-DCH服务小区变更为低功率小区;
NC向 UE发送新的测量控制消息, 消息中修改事件测量报告的 Rla 参数和 Hla参数, 使 UE在宏小区与低功率小区之间的下行业务边界处上 报相应的 1A事件测量报告。
下面举实例说明:
UE从宏小区向低功率小区移动触发 1B事件测量报告的处理流程, 如 图 18所示, 主要包括:
步骤 1801, 在图 17所示的处理流程之后, UE继续向低功率小区移动 的过程中, 经过图 22所示的 1B事件上报边界时, UE上报 1B事件测量报 告给 RNC;
步骤 1802, RNC向低功率基站发起无线链路重配过程, 其中, 无线链 路重配准备消息中包括 HS-DSCH相关信息以及 E-AGCH参数信息, 让低 功率小区的该无线链路支持 HS-DSCH的处理和发射以及 E-AGCH信道的 发射。
步骤 1803, RNC向宏小区发起无线链路重配过程, 其中, 无线链路重 配准备消息中包括删除 HS-DSCH相关参数;
步骤 1804~1805, NC分别向宏小区和低功率小区发送无线链路重配 提交消息;
步骤 1806 1809, NC与 UE之间完成物理信道重配过程与无线承载 重配过程,完成 HS-DSCH服务小区和 E-DCH服务小区变更为低功率小区。
步骤 1810 1813, NC向 UE发起激活集更新消息, 把宏小区从激活 集中删除以及 RNC向宏小区发起 L删除过程;
步骤 1814, RNC向 UE发送新的测量控制消息, 该测量控制消息中修 改 1A事件测量报告门限 Rla、 Hla等参数, 使得 UE在宏小区与低功率小 区之间的下行业务边界处上报 1A事件测量报告。 其中, 1A事件测量报告 门限 Rla、 Hla等参数的设置根据不同扩展小区软切换区的方法来确定。
需要说明的是, 当仅仅釆用小区独立偏置参数 CIO来扩展软切换区时 (例如图 2 ),修改 1A事件测量报告门限参数使得 Rla=0, Hla根据实际实 际情况设置(以避免频繁乒乓软切换为原则;)。
当低功率小区还釆用增强导频来来扩展软切换区时(例如图 3 导频功 率增强 Delta dB ), 修改 1A事件测量报告门限参数使得 la=Delta, Hla根 据实际实际情况设置(以避免频繁乒乓软切换为原则)。
通过图 18所示流程处理后, UE仅仅与低功率小区有无线链路关系, 上行下行业务都仅仅由低功率小区进行处理, 参见图 25所示 UE的上下行 业务与宏低功率小区之间的关系。 在另一种实施方式中,在判断所述 UE从低功率小区进入下行软合并增 益区时, 执行的软切换策略为:
所述 RNC向所述宏小区的基站发送无线链路建立请求消息, 消息中包 括使上行 E-DPDCH、 E-DPCCH, 上行 DPDCH失效的参数;
NC向 UE发起激活集更新消息,通知 UE将宏小区增加进激活集中; RNC 向宏小区的基站发送无线链路重配准备消息, 消息中包括 HS-DSCH相关信息以及发射绝对授权参数; NC还向低功率小区的基站发 送无线链路重配准备消息, 消息中包括转发绝对授权的参数以及删除 HS-DSCH相关信息;
NC 向 UE 发起物理信道重配过程和无线 7|载重配过程, 完成 HS-DSCH服务小区以及 E-DCH服务小区的变更过程,使得 HS-DSCH服务 小区以及 E-DCH服务小区变更为宏小区。
下面举实例说明:
初始条件, UE只与低功率小区有上下行业务连接, UE与宏小区没有 上下行业务连接, 如图 26所示; 如果该 UE不是从该宏小区移动到所在低 功率小区的, 那么还应该执行与上述步骤 1814, RNC向 UE发送新的测量 控制消息,该测量控制消息中修改 1 A事件测量报告门限 Rla、 Hla等参数, 使得 UE在宏小区与低功率小区之间的下行边界处上报 1A事件测量报告; UE从低功率小区向宏小区移动触发 1A事件测量 ^艮告的处理流程, 如图 19 所示, 主要包括:
步骤 1901, UE从低功率小区向宏小区移动的过程中, 移动到图 26所 示的 1A事件上报边界时, 上报 1A事件测量报告给 RNC;
步骤 1902, RNC向宏小区发起无线链路建立过程, 其中无线链路建立 请求消息中包括使上行 E-DPDCH/E-DPCCH/UL DPDCH信道失效的参数, 让宏基站所重配该无线链路 ( adio Link ) 不接收处理上行 E-DPDCH/E-DPCCH/UL DPDCH信号;
步骤 1903, NC向 UE发起激活集更新过程, 通知 UE将宏小区增加 进激活集中;
步骤 1904, UE将宏小区增加进激活集中, 并向 RNC返回激活集更新 完成消息;
步骤 1905~1906, NC向宏小区发起无线链路重配过程, 其中无线链 路重配准备消息中包括 HS-DSCH相关信息以及发射绝对授权参数;
NC还向低功率小区发起无线链路重配过程, 其中无线链路重配准备 消息中包括转发绝对授权的参数以及删除 HS-DSCH的相关参数。
步骤 1907~1908, NC分别向宏小区和低功率小区发送无线链路重配 提交消息;
步骤 1909 1912, NC向 UE发起物理信道重配过程和无线承载重配 过程, 完成 HS-DSCH服务小区以及 E-DCH服务小区的变更过程, 使得 HS-DSCH服务小区以及 E-DCH服务小区变更为宏小区。
通过图 19所示流程处理后, UE的上行业务仅仅在低功率小区接收, 但是 UE接收来自宏小区的上行绝对授权; 宏小区与低功率小区都向该 UE 发送 R99业务, 宏小区向该 UE发送 HSDPA业务。 使得 HS-DSCH服务小 区以及 E-DCH服务小区变更为宏小区,参见图 27所示 UE的上下行业务与 宏小区与低功率小区之间的关系。 在另一种实施方式中,在判断所述 UE从下行软合并增益区进入上行软 合并增益区时, 执行的软切换策略为:
NC向低功率小区的基站发送无线链路重配准备消息, 消息中包括使 下行 DPDCH信道失效的参数;
NC向宏小区的基站发送无线链路重配准备消息, 消息中包括使上行 E-DPDCH, E-DPCCH, 上行 DPDCH信道有效的参数;
NC向 UE发送新的测量控制消息, 消息中修改事件测量报告的 Rib 参数和 Hlb参数, 使 UE在宏小区与低功率小区之间的下行业务边界处上 报相应的 1B事件测量报告。
下面举实例说明:
UE从低功率小区向宏小区移动触发 1D事件测量报告的处理流程, 如 图 20所示, 主要包括: 步骤 2001, 在经过图 19所示的处理流程后, UE继续向宏小区移动到 达图 26所示的 1D事件上报边界时, 上报 1D事件测量报告给 RNC;
步骤 2002, RNC向低功率基站发起无线链路重配过程, 其中无线链路 重配准备消息中包括使下行 DPDCH信道失效的参数,让低功率小区所建立 的该无线链路 ( adio Link ) 不发射 DPDCH数据给 UE;
步骤 2003, RNC向低功率基站发送无线链路重配提交消息; 步骤 2004, RNC向宏基站发起无线链路重配过程, 其中, 无线链路重 配准备消息中包括使上行 E-DPDCH/E-DPCCH/上行 DPDCH信道有效的参 数;
步骤 2005, RNC向宏小区发送无线链路重配提交消息, 让宏小区所建 立的该无线链路 ( adio Link )接收 UE上行信号;
步骤 2006, RNC向 UE发送新的测量控制消息, 该测量控制消息中修 改 1B事件测量报告门限 Rlb、 Hlb等参数, 使得 UE在宏小区与低功率小 区之间的下行业务边界处上报 1B事件测量报告。
其中, 1B事件测量报告门限 Rlb、 Hlb等参数的设置根据不同扩展小 区软切换区的方法来确定。
需要说明的是, 当仅仅釆用小区独立偏置参数 CIO来扩展软切换区时 (例如图 2 ), 修改 1B事件测量报告门限参数使得 Rlb=DU-CIO (其中 DU 是宏小区与低功率小区之间上行边界与下行边界之间链路信号差值, CIO 是低功率小区的小区独立偏置参数), Hlb根据实际实际情况设置(以避免 频繁乒乓软切换为原则;)。
当低功率小区釆用小区独立偏置参数 CIO, 并且还釆用增强导频来来 扩展软切换区时 (例如图 3导频功率增强 Delta dB ), 修改 IB事件测量报 告门限参数使得 Rlb=DU-CIO-Delta (其中 DU是宏小区与低功率小区之间 上行边界与下行边界之间链路信号差值), Hlb根据实际实际情况设置(以 避免频繁乒乓软切换为原则;)。 通过图 20所示流程处理后, UE的上行业务在宏小区和低功率小区都 得到接收并最终进行软合并处理, UE仅仅接收到宏小区的下行业务, 而低 功率小区没有发送下行业务给该 UE, 参见图 28所示 UE的上下行业务与 宏小区与低功率小区之间的关系。 在另一种实施方式中,在判断所述 UE从上行软合并增益区进入宏小区 时, 执行的软切换策略为:
NC向 UE发送激活集更新消息, 通知 UE从激活集中删除低功率小 区;
NC向 UE发送无线链路删除消息, 删除 UE与低功率小区之间的无 线链路。
下面举实例说明:
UE从低功率小区向宏小区移动触发 1B事件测量报告的处理流程, 如 图 21所示, 主要包括:
步骤 2101, 在经过图 20所示的处理流程后, UE继续向宏小区移动到 达图 26所示的 1B事件上报边界时, 上报 1B事件测量报告给 RNC;
步骤 2102~2103, NC向 UE发起激活集更新过程(激活集中删除低 功率小区), UE向 RNC返回激活集更新完成消息;
步骤 2104~2105, NC向 UE发起无线链路删除过程, UE向 RNC返 回无线链路删除响应。
通过图 21所示流程处理后, UE仅仅与宏小区有无线链路关系, 上行 下行业务都仅仅由低功率小区进行处理, 参见图 29所示 UE的上下行业务 与宏低功率小区之间的关系。 本发明实施例还提供了一种软切换处理装置, 包括:
接收模块, 配置为接收 UE上报的事件测量报告; 处理模块, 配置为根据所述事件测量报告,在判断所述 UE从宏小区进 入上行软合并增益区、 从上行软合并增益区进入下行软合并增益区、 从下 行软合并增益区进入低功率小区、 从低功率小区进入下行软合并增益区、 从下行软合并增益区进入上行软合并增益区或从上行软合并增益区进入宏 小区时, 分别执行对应的软切换策略。
在一种实施方式中,在所述处理模块判断所述 UE从宏小区进入上行软 合并增益区时, 执行的软切换策略为:
向所述低功率小区的基站发送无线链路建立请求消息, 消息中包括使 下行专用物理数据信道 DPDCH失效的参数;
向所述 UE发起激活集更新过程,通知所述 UE将低功率小区增加进入 激活集中。
在一种实施方式中,在所述处理模块判断所述 UE从上行软合并增益区 进入下行软合并增益区时, 执行的软切换策略为:
向所述低功率小区的基站发送无线链路重配准备消息, 消息中包括使 下行 DPDCH有效的参数以及通知转发绝对授权;
向所述宏小区的基站发送无线链路重配准备消息, 消息中包括设置发 射绝对授权的参数以及使上行增强专用物理数据信道 E-DPDCH、增强专用 物理控制信道 E-DPCCH、 上行链路专用物理数据信道上行 DPDCH失效的 参数;
向所述 UE发送新的测量控制消息, 消息中修改事件测量报告的 Rib 参数和 Hlb参数, 使所述 UE移动到宏小区与低功率小区之间的下行业务 边界处上报相应的 1B事件测量报告。
其中, 如果是通过釆用小区独立偏置参数 CIO来扩展软切换区的, 则 修改所述 Rib参数为 0; 如果是通过釆用 CIO结合增强导频来扩展软切换 区的,则修改所述 Rib参数为 Delta,所述 Delta为主公共导频信道 P-CPICH 发射功率的增量。 在一种实施方式中,在所述处理模块判断所述 UE从下行软合并增益区 进入低功率小区时, 执行的软切换策略为:
向低功率小区的基站发送无线链路重配准备消息, 消息中包括高速下 行共享信道 HS-DSCH相关信息以及增强绝对授权信道 E-AGCH参数信息; 向宏小区的基站发送无线链路重配准备消息, 消息中包括删除 HS-DSCH相关信息;
与所述 UE 之间完成物理信道重配过程与无线 7|载重配过程, 完成 HS-DSCH服务小区和 E-DCH服务小区变更为低功率小区;
向所述 UE发送新的测量控制消息, 消息中修改事件测量报告的 Rla 参数和 Hla参数, 使所述 UE在宏小区与低功率小区之间的下行业务边界 处上报相应的 1A事件测量报告。
其中, 如果是通过釆用小区独立偏置参数 CIO来扩展软切换区的, 则 修改所述 Rla参数为 0; 如果是通过釆用 CIO结合增强导频来扩展软切换 区的,则修改所述 Rla参数为 Delta,所述 Delta为主公共导频信道 P-CPICH 发射功率的增量。
在一种实施方式中,在所述处理模块判断所述 UE从低功率小区进入下 行软合并增益区时, 执行的软切换策略为:
向所述宏小区的基站发送无线链路建立请求消息, 消息中包括使上行 E-DPDCH, E-DPCCH, 上行 DPDCH失效的参数;
向所述 UE发起激活集更新消息,通知所述 UE将所述宏小区增加进激 活集中;
向所述宏小区的基站发送无线链路重配准备消息, 消息中包括 HS-DSCH相关信息以及发射绝对授权参数; 所述 RNC还向所述低功率小 区的基站发送无线链路重配准备消息, 消息中包括转发绝对授权的参数以 及删除 HS-DSCH相关信息;
向所述 UE 发起物理信道重配过程和无线承载重配过程, 完成 HS-DSCH服务小区以及 E-DCH服务小区的变更过程,使得 HS-DSCH服务 小区以及 E-DCH服务小区变更为宏小区。
在一种实施方式中,在所述处理模块判断所述 UE从下行软合并增益区 进入上行软合并增益区时, 执行的软切换策略为:
向所述低功率小区的基站发送无线链路重配准备消息, 消息中包括使 下行 DPDCH信道失效的参数;
向所述宏小区的基站发送无线链路重配准备消息, 消息中包括使上行 E-DPDCH, E-DPCCH, 上行 DPDCH信道有效的参数;
向所述 UE发送新的测量控制消息, 消息中修改事件测量报告的 Rib 参数和 Hlb参数, 使所述 UE在宏小区与低功率小区之间的下行业务边界 处上报相应的 1B事件测量报告。
其中, 如果是通过釆用 CIO来扩展软切换区的, 则修改所述 Rib参数 为 DU-CIO; 如果是通过釆用 CIO结合增强导频来扩展软切换区的, 则修 改所述 Rib参数为 DU-CIO-Delta; 所述 DU为宏小区与低功率小区之间上 行边界与下行边界之间链路信号差值, 所述 CIO为低功率小区的小区独立 偏置参数, 所述 Delta为 P-CPICH发射功率的增量。
在一种实施方式中,在所述处理模块判断所述 UE从上行软合并增益区 进入宏小区时, 执行的软切换策略为:
向所述 UE发送激活集更新消息,通知 UE从激活集中删除所述低功率 小区;
向所述 UE发送无线链路删除消息,删除 UE与所述低功率小区之间的 无线链路。
需要说明的是, 上述实施例中的接收模块可以由软切换处理装置的通 信功能芯片来实现,处理模块可以由软切换处理装置的中央处理器( CPU, Central Processing Unit )、 处理器(MPU, Micro Processing Unit )、 数字信 号处理器(DSP, Digital Signal Processor )或可编程逻辑阵列(FPGA, Field - Programmable Gate Array ) 实现。
本发明实施例还提供了一种计算机可读存储介质, 所述存储介质包括 一组计算机可执行指令, 所述指令用于执行本发明实施例所述的软切换处 理方法。
在本发明所提供的几个实施例中, 应该理解到, 所揭露的方法、 装置和 电子设备, 可以通过其它的方式实现。 以上所描述的设备实施例仅仅是示 意性的, 例如, 所述单元的划分, 仅仅为一种逻辑功能划分, 实际实现时 可以有另外的划分方式, 如: 多个单元或组件可以结合, 或可以集成到另 一个系统, 或一些特征可以忽略, 或不执行。
另外, 在本发明各实施例中的各功能单元可以全部集成在一个处理单 元中, 也可以是各单元分别单独作为一个单元, 也可以两个或两个以上单 元集成在一个单元中; 上述集成的单元既可以釆用硬件的形式实现, 也可 以釆用硬件加软件功能单元的形式实现。
本领域普通技术人员可以理解: 实现上述方法实施例的全部或部分步 骤可以通过程序指令相关的硬件来完成, 前述的程序可以存储于一计算机 可读取存储介质中, 该程序在执行时, 执行包括上述方法实施例的步骤; 而前述的存储介质包括: 移动存储设备、 只读存储器 (ROM, ead-Only Memory ), 随机存取存者器( RAM, Random Access Memory ), 磁碟或者光 盘等各种可以存储程序代码的介质。
或者, 本发明实施例上述集成的单元如果以软件功能模块的形式实现 并作为独立的产品销售或使用时, 也可以存储在一个计算机可读取存储介 质中。 基于这样的理解, 本发明实施例的技术方案本质上或者说对现有技 术做出贡献的部分可以以软件产品的形式体现出来, 该计算机软件产品存 储在一个存储介质中, 包括若干指令用以使得一台计算机设备(可以是个 人计算机、 服务器、 或者网络设备等)执行本发明各个实施例所述方法的 全部或部分。 而前述的存储介质包括: 移动存储设备、 ROM、 RAM, 磁碟 或者光盘等各种可以存储程序代码的介质。
以上所述, 仅为本发明的较佳实施例而已, 并非用于限定本发明的保 护范围。

Claims

权利要求书
1、 一种软切换处理方法, 将宏小区与低功率小区之间的扩展后的软 切换区划分为上行软合并增益区和下行软合并增益区, 所述方法包括: 无线网络控制器 RNC接收用户终端 UE上报的事件测量报告; 根据所述事件测量报告,在判断所述 UE从宏小区进入上行软合并增 益区、 从上行软合并增益区进入下行软合并增益区、 从下行软合并增益 区进入低功率小区、 从低功率小区进入下行软合并增益区、 从下行软合 并增益区进入上行软合并增益区或从上行软合并增益区进入宏小区时, 分别执行对应的软切换策略。
2、 根据权利要求 1所述软切换处理方法, 其中, 在判断所述 UE从 宏小区进入上行软合并增益区时, 执行的软切换策略为:
所述 RNC向所述低功率小区的基站发送无线链路建立请求消息, 消 息中包括使下行专用物理数据信道 DPDCH失效的参数;
所述 RNC向所述 UE发起激活集更新过程, 通知所述 UE将低功率 小区增加进入激活集中。
3、 根据权利要求 1所述软切换处理方法, 其中, 在判断所述 UE从 上行软合并增益区进入下行软合并增益区时, 执行的软切换策略为: 所述 RNC向所述低功率小区的基站发送无线链路重配准备消息, 消 息中包括使下行 DPDCH有效的参数以及通知转发绝对授权;
所述 RNC向所述宏小区的基站发送无线链路重配准备消息, 消息中 包括设置发射绝对授权的参数以及使上行增强专用物理数据信道 E-DPDCH,增强专用物理控制信道 E-DPCCH、上行链路专用物理数据信 道上行 DPDCH失效的参数;
所述 RNC向所述 UE发送新的测量控制消息, 消息中修改事件测量 报告的 Rib参数和 Hlb参数, 使所述 UE移动到宏小区与低功率小区之 间的下行业务边界处上报相应的 1B事件测量报告。
4、 根据权利要求 3所述软切换处理方法, 其中,
如果是通过釆用小区独立偏置参数 CIO来扩展软切换区的, 则修改 所述 Rib参数为 0;
如果是通过釆用 CIO结合增强导频来扩展软切换区的, 则修改所述 Rib参数为 Delta, 所述 Delta为主公共导频信道 P-CPICH发射功率的增 量。
5、 根据权利要求 1所述软切换处理方法, 其中, 在判断所述 UE从 下行软合并增益区进入低功率小区时, 执行的软切换策略为:
所述 RNC向低功率小区的基站发送无线链路重配准备消息, 消息中 包括高速下行共享信道 HS-DSCH 相关信息以及增强绝对授权信道 E-AGCH参数信息;
所述 RNC向宏小区的基站发送无线链路重配准备消息, 消息中包括 删除 HS-DSCH相关信息;
所述 RNC与所述 UE之间完成物理信道重配过程与无线承载重配过 程, 完成 HS-DSCH服务小区和 E-DCH服务小区变更为低功率小区; 所述 RNC向所述 UE发送新的测量控制消息, 消息中修改事件测量 报告的 Rla参数和 Hla参数, 使所述 UE在宏小区与低功率小区之间的 下行业务边界处上报相应的 1A事件测量报告。
6、 根据权利要求 5所述软切换处理方法, 其中,
如果是通过釆用小区独立偏置参数 CIO来扩展软切换区的, 则修改 所述 Rla参数为 0;
如果是通过釆用 CIO结合增强导频来扩展软切换区的, 则修改所述 Rla参数为 Delta, 所述 Delta为主公共导频信道 P-CPICH发射功率的增 量。
7、 根据权利要求 1所述软切换处理方法, 其中, 在判断所述 UE从 低功率小区进入下行软合并增益区时, 执行的软切换策略为: 所述 RNC向所述宏小区的基站发送无线链路建立请求消息, 消息中 包括使上行 E-DPDCH、 E-DPCCH, 上行 DPDCH失效的参数;
所述 RNC向所述 UE发起激活集更新消息, 通知所述 UE将所述宏 小区增加进激活集中;
所述 RNC向所述宏小区的基站发送无线链路重配准备消息, 消息中 包括 HS-DSCH相关信息以及发射绝对授权参数; 所述 RNC还向所述低 功率小区的基站发送无线链路重配准备消息, 消息中包括转发绝对授权 的参数以及删除 HS-DSCH相关信息;
所述 RNC向所述 UE发起物理信道重配过程和无线承载重配过程, 完成 HS-DSCH 服务小区以及 E-DCH 服务小区的变更过程, 使得 HS-DSCH服务小区以及 E-DCH服务小区变更为宏小区。
8、 根据权利要求 1所述软切换处理方法, 其中, 在判断所述 UE从 下行软合并增益区进入上行软合并增益区时, 执行的软切换策略为: 所述 RNC向所述低功率小区的基站发送无线链路重配准备消息, 消 息中包括使下行 DPDCH信道失效的参数;
所述 RNC向所述宏小区的基站发送无线链路重配准备消息, 消息中 包括使上行 E-DPDCH、 E-DPCCH, 上行 DPDCH信道有效的参数; 所述 RNC向所述 UE发送新的测量控制消息, 消息中修改事件测量 报告的 Rib参数和 Hlb参数, 使所述 UE在宏小区与低功率小区之间的 下行业务边界处上报相应的 1B事件测量报告。
9、 根据权利要求 8所述软切换处理方法, 其中,
如果是通过釆用 CIO 来扩展软切换区的, 则修改所述 Rib 参数为 DU-CIO;
如果是通过釆用 CIO结合增强导频来扩展软切换区的, 则修改所述 Rib参数为 DU-CIO-Delta; 其中,所述 DU为宏小区与低功率小区之间上行边界与下行边界之间 链路信号差值, 所述 CIO为低功率小区的小区独立偏置参数, 所述 Delta 为 P-CPICH发射功率的增量。
10、 根据权利要求 1所述软切换处理方法, 其中, 在判断所述 UE从 上行软合并增益区进入宏小区时, 执行的软切换策略为:
所述 RNC向所述 UE发送激活集更新消息, 通知 UE从激活集中删 除所述 ^功率小区;
所述 RNC向所述 UE发送无线链路删除消息, 删除 UE与所述低功 率小区之间的无线链路。
11、一种软切换处理装置,宏小区与低功率小区之间的扩展后的软切 换区被划分为上行软合并增益区和下行软合并增益区, 所述装置包括: 接收模块, 配置为接收用户终端 UE上报的事件测量报告;
处理模块, 配置为根据所述事件测量报告, 在判断所述 UE从宏小区 进入上行软合并增益区、 从上行软合并增益区进入下行软合并增益区、 从下行软合并增益区进入低功率小区、 从低功率小区进入下行软合并增 益区、 从下行软合并增益区进入上行软合并增益区或从上行软合并增益 区进入宏小区时, 分别执行对应的软切换策略。
12、 根据权利要求 11所述软切换处理装置, 其中, 在所述处理模块 判断所述 UE从宏小区进入上行软合并增益区时, 执行的软切换策略为: 向所述低功率小区的基站发送无线链路建立请求消息, 消息中包括 使下行专用物理数据信道 DPDCH失效的参数;
向所述 UE发起激活集更新过程,通知所述 UE将低功率小区增加进 入激活集中。
13、 根据权利要求 11所述软切换处理装置, 其中, 在所述处理模块 判断所述 UE从上行软合并增益区进入下行软合并增益区时,执行的软切 换策略为: 向所述低功率小区的基站发送无线链路重配准备消息, 消息中包括 使下行 DPDCH有效的参数以及通知转发绝对授权;
向所述宏小区的基站发送无线链路重配准备消息, 消息中包括设置 发射绝对授权的参数以及使上行增强专用物理数据信道 E-DPDCH、增强 专用物理控制信道 E-DPCCH、 上行链路专用物理数据信道上行 DPDCH 失效的参数;
向所述 UE发送新的测量控制消息,消息中修改事件测量报告的 Rib 参数和 Hlb参数, 使所述 UE移动到宏小区与低功率小区之间的下行业 务边界处上报相应的 1B事件测量报告。
14、 根据权利要求 13所述软切换处理装置, 其中,
如果是通过釆用小区独立偏置参数 CIO来扩展软切换区的, 则修改 所述 Rib参数为 0;
如果是通过釆用 CIO结合增强导频来扩展软切换区的, 则修改所述 Rib参数为 Delta, 所述 Delta为主公共导频信道 P-CPICH发射功率的增 量。
15、 根据权利要求 11所述软切换处理装置, 其中, 在所述处理模块 判断所述 UE从下行软合并增益区进入低功率小区时,执行的软切换策略 为:
向低功率小区的基站发送无线链路重配准备消息, 消息中包括高速 下行共享信道 HS-DSCH相关信息以及增强绝对授权信道 E-AGCH参数 信息;
向宏小区的基站发送无线链路重配准备消息, 消息中包括删除 HS-DSCH相关信息;
与所述 UE之间完成物理信道重配过程与无线 7|载重配过程, 完成 HS-DSCH服务小区和 E-DCH服务小区变更为低功率小区;
向所述 UE发送新的测量控制消息, 消息中修改事件测量报告的 Rla 参数和 Hla参数, 使所述 UE在宏小区与低功率小区之间的下行业务边 界处上报相应的 1A事件测量报告。
16、 根据权利要求 15所述软切换处理装置, 其中,
如果是通过釆用小区独立偏置参数 CIO来扩展软切换区的, 则修改 所述 Rl a参数为 0;
如果是通过釆用 CIO结合增强导频来扩展软切换区的, 则修改所述 la参数为 Delta, 所述 Delta为主公共导频信道 P-CPICH发射功率的增 量。
17、 根据权利要求 11所述软切换处理装置, 其中, 在所述处理模块 判断所述 UE从低功率小区进入下行软合并增益区时,执行的软切换策略 为:
向所述宏小区的基站发送无线链路建立请求消息, 消息中包括使上 行 E-DPDCH、 E-DPCCH, 上行 DPDCH失效的参数;
向所述 UE发起激活集更新消息,通知所述 UE将所述宏小区增加进 激活集中;
向所述宏小区的基站发送无线链路重配准备消息, 消息中包括 HS-DSCH相关信息以及发射绝对授权参数; 所述 RNC还向所述低功率 小区的基站发送无线链路重配准备消息, 消息中包括转发绝对授权的参 数以及删除 HS-DSCH相关信息;
向所述 UE 发起物理信道重配过程和无线承载重配过程, 完成 HS-DSCH服务小区以及 E-DCH服务小区的变更过程,使得 HS-DSCH服 务小区以及 E-DCH服务小区变更为宏小区。
18、 根据权利要求 11所述软切换处理装置, 其中, 在所述处理模块 判断所述 UE从下行软合并增益区进入上行软合并增益区时,执行的软切 换策略为:
向所述低功率小区的基站发送无线链路重配准备消息, 消息中包括 使下行 DPDCH信道失效的参数;
向所述宏小区的基站发送无线链路重配准备消息, 消息中包括使上 行 E-DPDCH、 E-DPCCH, 上行 DPDCH信道有效的参数;
向所述 UE发送新的测量控制消息,消息中修改事件测量报告的 Rib 参数和 Hlb参数, 使所述 UE在宏小区与低功率小区之间的下行业务边 界处上报相应的 1B事件测量报告。
19、 根据权利要求 18所述软切换处理装置, 其中,
如果是通过釆用 CIO 来扩展软切换区的, 则修改所述 Rib 参数为 DU-CIO;
如果是通过釆用 CIO结合增强导频来扩展软切换区的, 则修改所述 Rib参数为 DU-CIO-Delta;
其中,所述 DU为宏小区与低功率小区之间上行边界与下行边界之间 链路信号差值, 所述 CIO为低功率小区的小区独立偏置参数, 所述 Delta 为 P-CPICH发射功率的增量。
20、 根据权利要求 11所述软切换处理装置, 其中, 在所述处理模块 判断所述 UE从上行软合并增益区进入宏小区时, 执行的软切换策略为: 向所述 UE发送激活集更新消息,通知 UE从激活集中删除所述低功 率小区;
向所述 UE发送无线链路删除消息,删除 UE与所述低功率小区之间 的无线链路。
21、 一种计算机可读存储介质, 所述存储介质包括一组计算机可执 行指令,所述指令用于执行权利要求 1-10任一项所述的软切换处理方法。
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