WO2013189419A2

WO2013189419A2 - Method, system, low power base station, and rnc for collaborative management of interference

Info

Publication number: WO2013189419A2
Application number: PCT/CN2013/082108
Authority: WO
Inventors: 詹建明
Original assignee: 中兴通讯股份有限公司
Priority date: 2013-04-03
Filing date: 2013-08-22
Publication date: 2013-12-27
Also published as: WO2013189419A3; CN104105180B; CN104105180A

Abstract

The present invention provides a method, a system, a low power base station, and an RNC for collaborative management of interference between a macro base station and a low power base station. The method for collaborative management of interference between a macro base station and a low power base station comprises: calculating, by the low power base station, an uplink load of the low power base station; comparing, by the low power base station, the uplink load with a load upper limit; when a comparison result is that the uplink load is higher than the load upper limit, performing power control, by the low power base station, on an unbalanced area UE. The present invention is capable of reducing the interference between the macro base station and the low power base station.

Description

Method, system, low power base station and RNC technical field for interference cooperative management

The present invention relates to the field of mobile communications, and more particularly to a method, system, low power base station, and radio network controller (RNC) for cooperatively managing interference between a macro base station and a low power base station. Background technique

In recent years, mobile broadband services have developed rapidly, and various 3GPP (The 3rd Generation Partnership Project) standard intelligent terminals (mobile phones, data cards, iPads, etc.) have been used for data services, directly leading to hotspot data. The traffic shows an explosive growth trend. It is difficult to completely solve the problem by merely enhancing the performance of the traditional macro cell. It is necessary to provide a new network solution based on the original traditional macro station network. The mobile communications industry has reached a high level of consensus by deploying co-frequency low-power base stations (such as Micro, Pico or Metro base stations) in macro cells to address the rapidly growing demand for data traffic.

These low-power base stations may be used for hotspot or hotspot coverage. Deploying low-power base stations can cause the following problems to occur:

1) Since the output power of the macro base station and the low power base station differ greatly, and the uplink received power does not differ greatly, the uplink coverage boundary between the macro base station and the low power base station is relatively far from the downlink coverage boundary, that is, there is a so-called A large uplink and downlink unbalanced area, the presence of this unbalanced area may cause users in the uneven area to cause great interference to low-power base stations. When the user load in the downlink coverage of the low-power base station is not high, it can be tolerated. However, when the uplink load demand of the downlink coverage area of the low-power base station is high, the user equipment (UE) from the unbalanced area is uplinked. Interference, and the low-power base station can not control the unbalanced area UE, which causes the users of the low-power downlink coverage area to be seriously interfered by users in the unbalanced area and affect the service performance.

2) In the downlink handover area between the macro base station and the low power, since the serving cell is a macro cell HSDPA (High Speed Downlink Packet Access) users, because the uplink power control is controlled by the low power base station, resulting in a high-speed Dedicated Physical Control Channel (HS-DPCCH) for HSDPA users. ₀ ) The uplink feedback channel power is low, which in turn causes the channel quality CQI included in the HS-DPCCH to be decoded by the HARQ ACK/NACK response error, which ultimately results in the number of HS-PDSCH retransmissions, resulting in poor HSDPA downlink performance of these users. Summary of the invention

The technical problem to be solved by the embodiments of the present invention is to provide a method, a system, a low power base station, and an RNC for coordinating the interference between a macro base station and a low power base station, which can reduce mutual interference between the macro base station and the low power base station. .

In order to solve the above technical problem, the embodiments of the present invention provide the following technical solutions:

A method for cooperatively managing interference between a macro base station and a low power base station, comprising: calculating, by a low power base station, an uplink load of the low power base station;

The low power base station compares the uplink load with a load upper threshold;

When the uplink load is higher than the upper threshold of the load, the low power base station performs power control on the unbalanced area user equipment UE.

The uplink load of the low-power base station is: a sum of uplink power of all UEs in the unbalanced area between the macro base station and the low-power base station and uplink power of all UEs in the downlink coverage area of the low-power base station.

The step of performing power control on the unbalanced area UE by the low power base station includes: the low power base station according to a load ratio of the unbalanced area UE, between the macro base station and the low power base station In all UEs of the unbalanced area, a predetermined number of non-equilibrium areas UE are selected in a manner of ranking from high to low; the load ratio of the unbalanced area UE is: uplink power of the unbalanced area UE and the low power The ratio between the uplink loads of the base stations;

The low power base station selects the non-flat according to the service type of the unbalanced area UE The power zone UE performs power control until any of the following conditions are met;

Condition 1 is: the uplink load of the controlled low power base station is lower than a load lower threshold, wherein the load lower threshold is less than or equal to the load upper threshold;

Condition two is that the uplink power of all UEs in the unbalanced area between the low power base stations is at a minimum.

The step of performing power control on the selected unbalanced area UE according to the service type of the unbalanced area UE by the low power base station is:

If the unbalanced area UE uses the HSUPA service, the low power base station sends the first load alarm information to the macro base station, where the first load alarm information carries the selected ID of the unbalanced area UE, The macro base station reduces the uplink grant of the unbalanced area UE selected according to the first alarm information to reduce the HSUPA rate;

If the unbalanced area UE uses the R99 uplink data service, the low power base station sends the second load alarm information to the radio network controller RNC through the macro base station, where the second load alarm information carries the selected non- And balancing, by the RNC, the rate of the R99 uplink PS data service of the selected unbalanced area UE according to the second alarm information.

The first load alarm information further includes: a selected load ratio of the unbalanced area UE;

The step of the macro base station to reduce the uplink grant of the unbalanced area UE according to the first alarm information to reduce the HSUPA rate is: the macro base station according to the scheduling priority of the unbalanced area UE and the unbalanced And sorting information of the load ratio of the area UE, and sequentially selecting the uplink grant of the unbalanced area UE to reduce the HSUPA rate;

The second load alarm information further includes: a selected load ratio of the unbalanced area UE;

The step of reducing, by the RNC, the rate of the R99 uplink PS data service of the unbalanced area UE according to the second alarm information: the RNC according to the unbalanced area UE The scheduling information of the scheduling priority and the load ratio of the unbalanced area UE sequentially reduces the rate of the selected R99 uplink PS data service of the unbalanced area UE.

A method for cooperatively managing interference between a macro base station and a low power base station, including:

The RNC acquires the UE in which the macro base station and the low power base station are in a handover state;

The RNC controls power of the UE according to a handover state of the UE.

The step of controlling, by the RNC, the power of the UE according to the handover state of the UE includes:

When the UE is in a handover state, the active set of the UE includes a macro cell and a low power base station cell, and the HS-DSCH serving cell of the UE is a macro cell, the RNC notifies the low power base station of the downlink DPCCH through the macro base station. The downlink power control command is not sent, so that the UE only receives the DPCCH power control command of the macro cell and performs power control only according to the DPCCH power control command of the macro cell;

When the UE is in a handover state, the active set of the UE includes a macro cell and a low power base station cell, and the serving cell of the HS-DSCH of the UE is changed to a cell where the low power base station is located, and the RNC notifies the low through the macro base station. The downlink DPCCH of the power base station sends a downlink power control command, so that the UE simultaneously receives the DPCCH power control command of the low power cell and the macro cell, and performs power control according to the DPCCH power control command of the low power 'J, the area, and the macro cell.

A low power base station, comprising:

a calculating unit, calculating an uplink load of the low power base station;

Comparing unit, comparing the uplink load with a load upper threshold;

And a control unit, when the uplink load is higher than the upper threshold of the load, performing power control on the unbalanced area UE.

The control unit includes:

Selecting, according to the load ratio of the unbalanced area UE, selecting a predetermined number from all the UEs in the unbalanced area between the macro base station and the low power base station in a high order And the load ratio of the unbalanced area UE is: a ratio between an uplink power of the unbalanced area UE and an uplink load of the low power base station;

a control module, the low power base station performs power control on the selected unbalanced area UE according to a service type of the unbalanced area UE, until any of the following conditions are met;

An RNC that includes:

Obtaining, acquiring, by the UE, the handover state of the macro base station and the low power base station;

And a control unit, where the RNC controls power of the UE according to a handover state of the UE.

The control unit includes:

a first notification unit, when the UE is in a handover state, the active set of the UE includes a macro cell and a low power base station cell, and the serving cell of the HS-DSCH of the UE is a macro cell, and the low base station is notified by the macro base station The downlink DPCCH of the base station does not send the downlink power control command, so that the UE only receives the DPCCH power control command of the macro cell and performs power control only according to the DPCCH power control command of the macro cell;

a second notification unit, when the UE is in a handover state, the active set of the UE includes a macro cell and a low power base station cell, and the serving cell of the HS-DSCH of the UE is changed to a cell where the low power base station is located, and the macro base station is used. The downlink power control command is sent to the downlink DPCCH of the low-power base station, so that the UE simultaneously receives the DPCCH power control command of the low-power cell and the macro cell, and performs power control according to the DPCCH power control command of the low-power cell and the macro cell.

A system for cooperatively managing interference between a macro base station and a low power base station, comprising: a low power base station and a UE; The low power base station is configured to calculate an uplink load of the low power base station; compare the uplink load with a load upper threshold to generate a comparison result; and when the comparison result is that the uplink load is higher than the load home The time limit is that the low power base station performs power control on the unbalanced area UE according to the service type of the unbalanced area UE.

A system for cooperatively managing interference between a macro base station and a low power base station, comprising: an RNC, a low power base station, and a UE;

The RNC, the UE that acquires the handover state of the macro base station and the low power base station; the RNC controls the power of the UE to control the low power base station according to the handover state of the UE, so that the low power base station is based on the RNC The notification message is used to perform the downlink DPCCH not to send the downlink power control command or the downlink DPCCH to send the downlink power control command.

Embodiments of the present invention have the following beneficial effects:

In the above solution, power control is performed on the unbalanced area UE according to an uplink load of the low power base station, which reduces mutual interference between the macro base station and the low power base station. DRAWINGS

1 is a schematic diagram of an uplink boundary and a downlink boundary of a macro base station and a low power base station according to an embodiment of the present invention; FIG. 2 is a networking diagram of a macro base station and a low power base station deployed according to an embodiment of the present invention;

FIG. 3 is a networking diagram of a low power base station deployed in a macro base station handover area according to an embodiment of the present invention;

4 is a schematic flowchart of an embodiment of a method for cooperatively managing interference between a macro base station and a low power base station according to the present invention;

5 is a schematic diagram of a macro base station/low power base station cooperatively managing uplink interference of a non-equilibrium area UE in the application scenario of FIG. 4;

FIG. 6 is a schematic flowchart diagram of another embodiment of a method for cooperatively managing interference between a macro base station and a low power base station according to the present invention;

FIG. 7 is a small service scenario in the application scenario of FIG. 6 in the case of a macro base station and a low power base station handover area; The area is a schematic diagram of the UE of the macro cell not receiving the power control command from the low power base station; FIG. 8 is the UE of the low power base in the case of the macro base station and the low power base station handover area in the application scenario of FIG. A schematic diagram of a power control command from a low power base station and a macro base station; FIG. 9 is a schematic structural diagram of a low power base station according to an embodiment of the present invention;

FIG. 10 is a schematic structural diagram of an RNC according to an embodiment of the present invention. detailed description

The technical problems, the technical solutions, and the advantages of the embodiments of the present invention will become more apparent from the following detailed description.

First, the networking mode of the embodiment of the present invention is described. Figure 1 is a diagram showing the uplink and downlink borders of a macro base station and a low-power base station; Figure 2 is a networking diagram of a macro base station and a low-power base station; Figure 3 is a network diagram of a low-power base station deployed in a macro base station handover area. . As shown in FIG. 2, one or more low-power base stations are deployed in a macro base station cell coverage, and the low-power base station and the macro base station are in a wired transmission mode (Ethernet, XPON (New Generation Fiber Access Technology), optical fiber, etc.) or The wireless transmission mode (WLAN or microwave, etc.) is connected in a network. Or, as shown in FIG. 3, for the coverage of the cell coverage of the low-power base station coverage area and the two or more macro base stations, the low-power base station simultaneously transmits the wired transmission mode to the plurality of macro base stations (the Ethernet , the XPON, the optical fiber, etc.) or the wireless transmission mode (WLAN or microwave, etc.) to perform a networking connection, wherein the low power base station 2 is simultaneously connected to two macro base stations.

As shown in FIG. 4, a method for cooperatively managing interference between a macro base station and a low power base station according to an embodiment of the present invention includes:

Step 11: The low power base station calculates an uplink load of the low power base station; the uplink load of the low power base station is: an uplink power of all UEs in an unbalanced area between the macro base station and the low power base station, and a downlink of the low power base station The sum between the uplink powers of all UEs in the coverage area.

Step 12: The low power base station compares the uplink load with a load upper threshold to generate a comparison result. Step 13: When the comparison result is that the uplink load is lower than or equal to the upper threshold of the load, the macro base station grants a normal uplink grant to the unbalanced area UE of the low power base station;

Step 14. Otherwise, the low power base station performs power control on the unbalanced area UE. Step 14 includes:

Step 141: The low-power base station selects a predetermined manner from all the UEs in the unbalanced area between the macro base station and the low-power base station according to the load ratio of the unbalanced area UE. a number of unbalanced area UEs; a load ratio of the unbalanced area UE is: a ratio between an uplink power of the unbalanced area UE and an uplink load of the low power base station;

Step 142: The low-power base station performs power control on the selected non-balanced area UE according to the service type of the unbalanced area UE, until any of the following conditions are met;

Step 142 is specifically as follows:

If the unbalanced area UE uses a High Speed Downlink Packet Access (HSUPA) service, the low power base station sends the first load alarm information to the macro base station, where the first load alarm information carries a selection The identifier (ID) of the non-equilibrium area UE is sent, so that the macro base station lowers the selected uplink grant of the unbalanced area UE according to the first alarm information to reduce the HSUPA rate; The first load alarm information further includes: a selected load ratio of the unbalanced area UE; the step is specifically: the macro base station according to the scheduling priority of the unbalanced area UE and the load ratio of the unbalanced area UE Sorting the information, and sequentially selecting the selected uplink grant of the unbalanced area UE to reduce the HSUPA rate;

If the unbalanced area UE uses the R99 uplink data service, the low power base station sends the second load alarm information to the RNC through the macro base station, where the second load alarm information carries the selection The ID of the unbalanced area UE is selected, so that the RNC reduces the rate of the election according to the second alarm information. Optionally, the second load alarm information further includes: the selected load ratio of the unbalanced area UE; the step is specifically: the RNC according to the scheduling priority of the unbalanced area UE and the non- The ranking information of the load ratio of the balance area UE sequentially reduces the rate of the R99 uplink PS data service of the selected unbalanced area UE.

As shown in FIG. 5, the following describes an application scenario of a coordinated management method for interference of a non-balanced area UE to a low power base station, including the following steps:

Step 1: Determine UEs in the macro coverage area that are in the unbalanced area between the macro base station and the low power base station. Specifically, the macro base station notifies the low-power base station of the uplink scrambling code and the slot format of all activated users in the coverage area, and the macro base station and the low-power base station respectively measure the power of the activated user of the macro coverage area (for example, the uplink DPCCH guide of the UE) Frequency Pilot RSCP, etc.). When the uplink power of a user measured by the low power base station is greater than the set threshold, the low power base station sends the measured uplink power to the macro base station, and the macro base station compares the uplink power measured by the macro base station with the uplink power measured by the low power base station. If the uplink power measured by the low power base station - the uplink power measured by the macro base station is > 0, then the UE is in the unbalanced area between the macro base station and the low power base station, otherwise the UE is in the balance area.

Step 2: If the macro base station acquires the low power base station load in an unalarmed state, the macro base station grants a normal uplink grant to the unbalanced area UE of the low power base station.

Step 3: If the macro base station acquires the low power base station load in an alarm state, the macro base station controls the uplink power of the unbalanced area UE, and the macro base station notifies the low power base station of the uplink scrambling code and the slot format used by the unbalanced area UE. The low power base station performs search and demodulation according to the uplink scrambling code and the slot format used by the unbalanced area UE, and calculates the uplink power of the unbalanced area UE. The low power base station calculates the uplink power from the downlink coverage area UE of the low power base station. The low power base station uplink load includes uplink power from the unbalanced area UE between the macro base station and the low power base station and uplink power of the low power base station downlink coverage area UE. The low power base station will calculate the calculated uplink load and settings The upper threshold of the load is compared. If the threshold is higher than the upper threshold of the load, the low-power base station calculates multiple UEs with a higher load ratio. The higher-load UEs may use the HSUPA service or the R99 uplink data service.

If the UE with a relatively high load uses the HSUPA service, the low-power base station sends the load alarm information to the macro base station, and the load alarm information carries the UE identifiers of the HSUPA service in the non-equilibrium area with a relatively large proportion, and includes the load. Sort the proportion of the information, then skip to step 4.

If the UE with a higher load uses the R99 uplink data service, the low-power base station sends a load alarm to the RNC, and the load alarm information also carries multiple UE identifiers that are using the R99 uplink data service in the unbalanced area where the load is relatively heavy. Also include the sorting information of the proportion of the load, and then skip to step 6.

Step 4: The macro base station performs uplink power control on the unbalanced area UE according to the load alarm information sent by the low power base station. In the unbalanced area UEs sent by the low power base stations, the macro base station preferentially processes the UE with lower user scheduling priority. . When the scheduling priorities are the same, the UEs with a heavier load ratio are preferentially processed to control the UEs and reduce the UE transmit power. For example, when the control is to the lowest case, the macro base station sends a message that the uplink grant of the UE in the unbalanced area has been reduced to the lowest. After receiving the message that the uplink grant of the UE in the unbalanced area has been reduced to the minimum, the low-power base station does not send an alarm to the macro base station.

Step 6: The RNC performs uplink power control on the unbalanced area UE according to the load alarm information sent by the low power base station. In the unbalanced area UEs sent by the low power base stations, the RNC preferentially processes the UE with a relatively large proportion of the load, and The high-speed R99 uplink PS service is adjusted to the low-speed uplink PS service, for example, the uplink PS 144 kbps is adjusted to the uplink PS 32 kbp or PS 16 kbps low-speed uplink service.

Step 7. When the load of the low power base station is lower than the load lower threshold, the alarmed low power base station is given The connected macro base station sends a "load alarm cancellation" message.

Step 8. After the macro base station obtains the "load alarm cancellation notification" from the low power base station, the macro base station grants a normal uplink grant to the unbalanced area UE of the low power base station.

In the above scenario, the low-power base station service is preferentially guaranteed, and the unbalanced-area UE uplink service is suppressed. The non-balanced-area UE service is not interfered by the low-power base station without affecting the low-power base station service. The low power base station will send a "load alarm notification" to the macro base station multiple times until the macro base station minimizes the uplink load of all UEs in the unbalanced area and notifies the low power base station.

As shown in FIG. 6, a method for cooperatively managing interference between a macro base station and a low power base station according to an embodiment of the present invention includes:

Step 31: The RNC radio network controller acquires the UE in which the macro base station and the low power base station are in a switching state;

Step 32: The RNC controls power of the UE according to a handover state of the UE.

Step 32 includes:

When the UE is in a handover state, the active set of the UE includes a macro cell and a low power base station cell, and the serving cell handover of the High Speed Downlink Shared Channel (HS-DSCH) of the UE is In the case of the macro cell, the RNC notifies the low power base station that the downlink DPCCH does not send the downlink power control command, so that the UE only receives the DPCCH power control command of the macro cell and performs power control only according to the DPCCH power control command of the macro cell;

When the UE is in a handover state, the active set of the UE includes a macro cell and a low power base station cell, and the serving cell of the HS-DSCH of the UE is switched to a cell where the low power base station is located, and the RNC notifies the low through the macro base station. The downlink DPCCH of the power base station sends a downlink power control command, so that the UE simultaneously receives the DPCCH power control command of the low power cell and the macro cell, and performs power control according to the DPCCH power control command of the low power 'J, the area, and the macro cell. The following describes a method for solving the power interference of the UE HS-DPCCH of the macro cell from the low power base station, including:

The RNC monitors the UE in the handover state of the macro base station and the low power base station; when the serving cell of the HS-DSCH is the macro cell, the RNC notifies the low power base station that the downlink DPCCH does not send the downlink power control TPC command through the macro base station, as shown in FIG. 7 . As shown, the UE is only allowed to receive the DPCCH power control command of the macro cell. There are various implementation methods, for example: In the RADIO LINK SETUP REQUEST message between the RNC and the Node B, the extension field increases the downlink DPCCH TPC working mode indication, and is set to the "off" state (TPC OFF MODE). Refer to Table 1 and Table 2 below to add the downlink DPCCH TPC working mode indication to the extended field in the RADIO LINK SETUP REQUEST message between RNC and Node B, specifically: RADIO LINK SETUP REQUEST DL DPCH Information adds FDD TPC DL Mode, sets FDD TPC DL Mode = TPC OFF MODE.

When the serving cell of the HS-DSCH of the UE is changed to the cell where the low-power base station is located, the RNC notifies the low-power base station of the downlink DPCCH to send the downlink power control TPC command through the macro base station. As shown in FIG. 8, the UE can simultaneously receive the low-power cell and the macro. DPCCH power control command of the cell. There are various implementation methods. For example, the extended field in the RADIO LINK RECONFIGURATION PREPARE between the RNC and the Node B increases the downlink DPCCH TPC working mode indication, and is set to "on," state (TPC ON). MODE ), refer to Table 1 and Table 2 below to increase the downlink DPCCH TPC working mode indication for the extended field in the RADIO LINK RECONFIGURATION PREPARE between RNC and Node B, specifically: RADIO LINK SETUP REQUEST DL DPCH Information increases FDD TPC DL Mode, sets FDD TPC DL Mode = TPC ON MODE. >FDD TPC DL mode M 9.XXX TPC operation

Mode Table 2:

If "FDD TPC DL Mode" is "TPC ON Mode", TPC will be sent. If "FDD TPC DL Mode" is "TPC OFF Mode", TPC will not be sent.

As shown in FIG. 9, a low-power base station according to an embodiment of the present invention,

The calculating unit 41 calculates an uplink load of the low power base station;

The comparing unit 42 compares the uplink load with the upper threshold of the load to generate a comparison result, and the control unit 43 performs power control on the unbalanced area UE when the comparison result is that the uplink load is higher than the upper threshold of the load. .

The control unit 43 includes:

Selecting, according to the load ratio of the unbalanced area UE, selecting a predetermined number of non-equilibrium areas from all the UEs in the unbalanced area between the macro base station and the low power base station in a high order a load ratio of the unbalanced area UE: the unbalanced area UE a ratio between an uplink power and an uplink load of the low power base station;

a control module, the low power base station performs power control on the selected unbalanced area UE according to the service type of the unbalanced area UE, until any of the following conditions are met;

As shown in FIG. 10, an RNC according to an embodiment of the present invention includes:

The acquiring unit 61 is configured to acquire a UE that has a handover state between the macro base station and the low power base station;

Control unit 62, the RNC controls power of the UE according to a handover state of the UE.

The control unit 62 includes:

a first notification unit, when the UE is in a handover state, the active set of the UE includes a macro cell and a low power base station cell, and when the serving cell of the HS-DSCH of the UE is switched to a macro cell, the macro base station notifies the low The downlink DPCCH of the power base station does not send the downlink power control command, so that the UE only receives the DPCCH power control command of the macro cell and performs power control only according to the DPCCH power control command of the macro cell;

a second notification unit, when the UE is in a handover state, the active set of the UE includes a macro cell and a low power base station cell, and the serving cell of the HS-DSCH of the UE is switched to a cell where the low power base station is located, and the macro base station is used. The downlink power control command is sent to the downlink DPCCH of the low-power base station, so that the UE simultaneously receives the DPCCH power control command of the low-power cell and the macro cell, and performs power control according to the DPCCH power control command of the low-power cell and the macro cell.

The embodiment of the present invention further provides a system for cooperatively managing interference between a macro base station and a low power base station, including: a low power base station and a UE;

The low power base station is configured to calculate an uplink load of the low power base station; Comparing the line load with the upper threshold of the load, and generating a comparison result; when the comparison result is that the uplink load is higher than the upper threshold of the load, the low power base station according to the service type of the unbalanced area UE, The unbalanced area UE performs power control.

The embodiment of the present invention further provides a system for cooperatively managing interference between a macro base station and a low power base station, including: an RNC, a low power base station, and a UE;

The embodiment of the present invention provides a method for cooperatively managing interference between a macro base station and a low power base station based on a macro base station cooperative management for a problem of interference between a WCDMA macro base station and a WCDMA low power base station, and scheduling the macro base station and the low power base station. The device communicates through the backhaul (backhaul line) connection; and controls the interference between the macro base station and the low power base station through the uplink load alarm mechanism of the macro base station and the micro base station, and solves the problem of mutual interference between the macro base station and the low power base station, and has the following features:

(1) Can adapt to medium and low speed transmission networking (WLAN or medium and low speed microwave) scenarios

(2) Under the condition of preferentially guaranteeing the uplink service experience of the low-power base station, the uplink service of the macro base station UE in the unbalanced area is allowed to be maximized.

The embodiment of the present invention is adapted to a scenario in which a macro base station and a low power base station are respectively independent cells and merged into one cell. For the non-equilibrium area UE uplink data service, the RNC can use HSUPA access to prevent the low-power base station from initiating load alarm information to the RNC.

The above is only the preferred embodiment of the present invention and is not intended to limit the scope of the present invention.

Claims

Claim

2. The method according to claim 1, wherein the uplink load of the low power base station is: uplink power of all UEs in the unbalanced area between the macro base station and the low power base station and downlink coverage area of the low power base station The sum between the uplink powers of all UEs.

The method according to claim 1, wherein the step of performing power control on the unbalanced area UE by the low power base station comprises:

And selecting, by the low power base station, a predetermined number of non-sorts from all the UEs in the non-equilibrium zone between the macro base station and the low-power base station according to the load ratio of the unbalanced area UE a balance ratio UE; a load ratio of the unbalanced area UE is a ratio between an uplink power of the unbalanced area UE and an uplink load of the low power base station;

And the low power base station performs power control on the selected unbalanced area UE according to the service type of the unbalanced area UE, until any of the following conditions are met;

4. The method according to claim 3, wherein

The step of performing power control on the selected unbalanced area UE by the low power base station according to the service type of the unbalanced area UE is:

If the unbalanced area UE uses HSUPA traffic, the low power base station gives the macro base The station sends the first load alarm information, where the first load alarm information carries the selected ID of the unbalanced area UE, so that the macro base station lowers the selected unbalanced area UE according to the first alarm information. Upstream authorization to reduce the HSUPA rate;

5. The method according to claim 4, wherein

The step of reducing, by the RNC, the rate of the R99 uplink PS data service of the unbalanced area UE according to the second alarm information: the RNC according to the scheduling priority of the unbalanced area UE and the non- The ranking information of the load ratio of the balance area UE sequentially reduces the rate of the R99 uplink PS data service of the selected unbalanced area UE.

A method for cooperatively managing interference between a macro base station and a low power base station, comprising: an RNC acquiring a UE in a handover state between a macro base station and a low power base station;

The RNC controls power of the UE according to a handover state of the UE.

The method according to claim 6, wherein the step of the RNC controlling the power of the UE according to the handover state of the UE includes: When the UE is in a handover state, the active set of the UE includes a macro cell and a low power base station cell, and the HS-DSCH serving cell of the UE is a macro cell, the RNC notifies the low power base station of the downlink DPCCH through the macro base station. The downlink power control command is not sent, so that the UE only receives the DPCCH power control command of the macro cell and performs power control only according to the DPCCH power control command of the macro cell;

8. A low power base station comprising:

a calculating unit, calculating an uplink load of the low power base station;

Comparing unit, comparing the uplink load with a load upper threshold;

The low-power base station according to claim 8, wherein the control unit comprises: a selection module, according to a load ratio of the unbalanced area UE, from a non-base between the macro base station and the low power base station a predetermined number of non-equilibrium zones UEs are selected in a manner of ranking from high to low among all the UEs in the balance zone; the load ratio of the unbalanced zone UE is: uplink power of the unbalanced zone UE and the low power base station The ratio between the upstream loads;

Condition 2 is: the uplink power of all UEs in the unbalanced area between the low-power base stations is At the lowest.

10. An RNC that includes:

The RNC according to claim 10, wherein the control unit comprises: a first notification unit, when the UE is in a handover state, the active set of the UE includes a macro cell and a low power base station cell, and the When the serving cell of the HS-DSCH of the UE is a macro cell, the macro base station notifies the low-power base station that the downlink DPCCH does not send the downlink power control command, so that the UE only receives the DPCCH power control command of the macro cell and only according to the DPCCH function of the macro cell. Control commands for power control;

12. A system for cooperatively managing interference between a macro base station and a low power base station, comprising: a low power base station and a UE;

The low power base station is configured to calculate an uplink load of the low power base station; compare the uplink load with a load upper threshold to generate a comparison result; and when the comparison result is that the uplink load is higher than the load home The time limit is that the low power base station performs power control on the unbalanced area UE according to the service type of the unbalanced area UE.

13. A system for cooperatively managing interference between a macro base station and a low power base station, comprising: an RNC, a low power base station, and a UE;

An RNC, acquiring, by the UE, a handover state of the macro base station and the low power base station; The RNC controls the power of the UE to control the low power base station according to the handover state of the UE, so that the low power base station performs the downlink DPCCH not to send the downlink power control command or the downlink DPCCH to send the downlink power control command according to the RNC notification message.