WO2015176317A1

WO2015176317A1 - Device and method for reducing interference of combined cell, base station and system

Info

Publication number: WO2015176317A1
Application number: PCT/CN2014/078308
Authority: WO
Inventors: 毛京京; 姚霈; 王立毅
Original assignee: 华为技术有限公司
Priority date: 2014-05-23
Filing date: 2014-05-23
Publication date: 2015-11-26
Also published as: CN105359566A; CN105359566B

Abstract

Disclosed are a device and method for reducing interference of a combined cell, a base station and a system. The combined cell comprises at least two sectors. The device for reducing interference of a combined cell comprises a configuring module (11) and a sending module (12). The configuring module (11) is used for configuring at least two main broadcast control channels (BCCHs) with the same frequency for the combined cell, wherein the at least two main BCCHs are distributed on different timeslots. The sending module (12) is used for sending signals corresponding to at least two radio frames, wherein the signals corresponding to the at least two radio frames separately carry a frequency correction channel (FCCH) signal of one main BCCH, so that at least a first user equipment (UE) and a second UE located in the at least two sectors access different main BCCH timeslots separately. By using the present invention, collisions between slow associated control channels (SACCHs) sent by a user performing space division multiplexing can be effectively avoided in a scenario in which discontinuous transmission (DTX) is enabled.

Description

Apparatus, method, base station and system for reducing combined cell interference

【技术领域】[Technical Field]

The present invention relates to the field of wireless communication technologies, and in particular, to a device for reducing interference of a merged cell, and to a method, a base station, and a system for reducing interference of a merged cell.

【背景技术】【Background technique】

With the Global System for Mobile Communications (Global System for Mobile Communications, The spectrum re-forming technology (also known as refarming) of GSM) is constantly evolving, and the frequency band of the GSM system is getting narrower and narrower. In order to reduce the interference of the GSM system and improve the network quality, a cell merging technology is proposed, that is, a plurality of cells adopting the same frequency point are combined to obtain a combined cell, which is also called a super cell, and the number of frequency points used by the merging cell is greatly reduced, but the coverage thereof is covered. The range remains the same, and user equipment in different cells can be spatially multiplexed.

However, the inventors of the present invention found in the long-term research that the radio frame transmitted by the merged cell carries only one primary broadcast control channel (broadcast). Control channel (BCCH) information, therefore, the user equipment performing space division multiplexing corrects the channel according to the frequency at which the primary BCCH is received (Frequency Correction After the information on the channel, the FCCH is located on the primary BCCH, the user equipment that performs the space division multiplexing is synchronized in the time-frequency of the merging cell, so there is a continuation between the user equipments of the space division multiplexing. Strong co-channel interference, which leads to discontinuous transmission (Discontinuous) Transmission, DTX) The space-division multiplexed user equipment is on the slow associated control channel (Slow Associated Control) The signal transmitted on the Channel, SACCH) will continue to collide, that is, the SACCH collision occurs, resulting in an increase in the call drop rate of the merged cell.

【发明内容】 [Summary of the Invention]

The technical problem to be solved by the present invention is to provide a device, a method, a base station, and a system for reducing the interference of the merged cell, which can effectively avoid the SACCH collision of the user equipment of the space division multiplexing in the scenario of enabling the DTX, and reduce the network call drop rate.

A first aspect of the present invention provides an apparatus for reducing interference of a merged cell, where the merged cell includes at least two sectors, and the apparatus includes: a configuration module, configured to configure at least two identical frequency points for the merged cell The primary broadcast control channel BCCH, the at least two primary BCCHs are distributed on different time slots; the sending module is configured to send signals corresponding to the at least two radio frames, and the signals corresponding to the at least two radio frames respectively carry one The frequency correction channel FCCH signal of the primary BCCH is such that at least the first user equipment UE and the second UE located in the at least two sectors respectively access different primary BCCHs.

With reference to the first aspect, in a first possible implementation manner of the first aspect, the device further includes: a receiving module, configured to receive, after the first UE accesses one of the at least two primary BCCHs, send The channel requesting module is configured to allocate a traffic channel to the first UE according to the channel request message received by the receiving module.

With reference to the first possible implementation manner of the first aspect, in a second possible implementation manner of the first aspect, the channel allocation module includes: an obtaining submodule, a first determining submodule, and a second determining submodule, The acquiring submodule is configured to acquire an idle traffic channel that the first UE can allocate after accessing one of the at least two primary BCCHs; the first determining submodule, configured to determine the idle traffic channel a pending traffic channel, wherein the to-be-determined traffic channel corresponds to a traffic channel occupied by the second UE after accessing another of the at least two primary BCCHs, and the second UE and the first UE are different The second determining submodule, configured to determine, in the to-be-determined traffic channel, that at least one traffic channel is allocated to the first UE.

With reference to the first possible implementation manner of the first aspect, in a third possible implementation manner of the first aspect, the channel allocation module includes: a third determining submodule, where the third determining submodule is configured to: Determining that the at least one idle traffic channel is allocated to the first UE, the at least one idle traffic channel being different from a channel occupied by any one of the merged cells after accessing the at least two primary BCCHs.

A second aspect of the present invention provides a base station for reducing interference of a merged cell, where the merged cell includes at least two sectors, the base station includes: an antenna, configured to transmit a radio frame, and a configuration module, configured to configure the merged cell At least two BCCHs of the same frequency point, the at least two primary BCCHs are distributed on different time slots; and a sending module, configured to send, to the antenna, a signal corresponding to at least two radio frames, so that the antenna transmitting station Decoding at least two radio frames, and the at least two radio frames respectively carrying an FCCH of one primary BCCH, so that at least the first UE and the second UE located in the at least two sectors respectively access different Main BCCH.

With reference to the second aspect, in a first possible implementation manner of the second aspect, the base station includes: a receiving module, configured to receive, after the first UE accesses one of the at least two primary BCCHs a channel requesting message, configured to allocate a traffic channel to the first UE according to the channel request message received by the receiving module.

A third aspect of the present invention provides a method for reducing interference of a merged cell, where the merged cell includes at least two sectors, and the method includes: configuring, for the merged cell, at least two BCCHs of the same frequency, the at least two The primary BCCHs are distributed on different time slots; the signals corresponding to the at least two radio frames are sent, and the signals corresponding to the at least two radio frames respectively carry a FCCH signal of the primary BCCH, so that the at least two fans are located. At least the first UE and the second UE in the zone respectively access different primary BCCHs.

With reference to the third aspect, in a first possible implementation manner of the third aspect, the step of sending the signal corresponding to the at least two radio frames includes: receiving, by the first UE, accessing the at least two a channel request message sent after one of the primary BCCHs; a traffic channel is allocated to the first UE according to the channel request message received by the receiving module.

With the first possible implementation of the third aspect, in a second possible implementation manner of the third aspect, the step of: allocating a service channel to the first UE includes: acquiring, acquiring, An idle traffic channel that can be allocated after entering one of the at least two primary BCCHs; determining a pending traffic channel in the idle traffic channel, wherein the pending traffic channel corresponds to the second UE accessing the at least two The traffic channel occupied by the other of the primary BCCH, the second UE and the first UE are in different sectors; and the at least one traffic channel is determined to be allocated to the first UE in the to-be-determined traffic channel.

With reference to the first possible implementation manner of the third aspect, in a third possible implementation manner of the third aspect, the step of: assigning a traffic channel to the first UE includes: determining the at least one idle traffic channel Assigned to the first UE, the at least one idle traffic channel is different from a channel occupied by any one of the merged cells after accessing the at least two primary BCCHs.

A fourth aspect of the present invention provides a system for reducing interference of a merged cell, including: at least a first UE and a second UE located in the merged cell; an antenna for transmitting a radio frame; and an access control device, including a configuration module and a sending module, where the configuration module is configured to configure at least two BCCHs of the same frequency point for the merged cell, where the at least two primary BCCHs are distributed on different time slots; and the sending module is configured to send at least the antenna a signal corresponding to two radio frames, such that the antenna transmits the at least two radio frames, and the at least two radio frames respectively carry an FCCH signal of a primary BCCH such that the at least two sectors are located At least the first UE and the second UE respectively access different primary BCCHs.

With reference to the fourth aspect, in a first possible implementation manner of the fourth aspect, the access control device further includes: a receiving module, configured to receive, by the first UE, access to the at least two primary BCCHs And a channel allocation module, configured to allocate a traffic channel to the first UE according to the channel request message received by the receiving module.

With reference to the first possible implementation manner of the fourth aspect, in a second possible implementation manner of the fourth aspect, the channel allocation module includes: an obtaining submodule, a first determining submodule, and a second determining submodule; The acquiring sub-module is configured to acquire an idle traffic channel that the first UE can allocate after accessing one of the at least two primary BCCHs; the first determining sub-module is configured to determine the idle traffic channel a pending traffic channel, where the to-be-determined traffic channel corresponds to a traffic channel occupied by the second UE after accessing another of the at least two primary BCCHs, and the second UE and the first UE are in different And the second determining submodule, configured to determine, in the to-be-determined traffic channel, that at least one traffic channel is allocated to the first UE.

With reference to the first possible implementation manner of the fourth aspect, in a third possible implementation manner of the fourth aspect, the channel allocation module includes a third determining submodule, and the third determining submodule is configured to determine The at least one idle traffic channel is allocated to the first UE, and the at least one idle traffic channel is different from a channel occupied by any one of the merged cells after accessing the at least two primary BCCHs.

A fifth aspect of the present invention provides an apparatus for reducing interference of a merged cell, where the merged cell includes at least two sectors, and the apparatus includes: a processor, a memory, a bus, and a communication interface, wherein the processor, the The memory and the communication interface are connected to each other by the bus; the memory is configured to store a program; the processor is configured to execute a program stored in the memory to configure at least two primary broadcast control channels of the same frequency point for the merged cell BCCH, the at least two primary BCCHs are distributed on different time slots; and the signals corresponding to the at least two radio frames are sequentially sent through the bus and the communication interface, and the signals corresponding to the at least two radio frames respectively carry one The FCCH signal of the primary BCCH is such that at least the first UE and the second UE located in the at least two sectors respectively access different primary BCCHs.

A sixth aspect of the present invention provides a base station for reducing interference of a merged cell, where the merged cell includes at least two sectors, and the base station includes: an antenna, a processor, a memory, a bus, and a communication interface, where the processor, The memory and the communication interface are connected to each other by the bus, the communication interface is connected to the antenna; the memory is used to store a program; and the processor is configured to execute a program stored in the memory to configure the merged cell At least two primary BCCHs of the same frequency point, the at least two primary BCCHs are distributed over different time slots; and signals corresponding to at least two radio frames are sequentially transmitted to the antenna through the bus and the communication interface, The signals corresponding to the at least two radio frames respectively carry the FCCH signal of one primary BCCH, so that at least the first UE and the second UE located in the at least two sectors respectively access different primary BCCHs.

As described above, in the device, the method, the base station, and the system for reducing the interference of the merged cell provided by the embodiment of the present invention, the merged cell is configured with at least two primary BCCHs of the same frequency point, and the at least two wireless frames that are sent are respectively carried. FCCH of a primary BCCH, the FCCH carried by at least two radio frames is not on the same numbered time slot, so users who perform space division multiplexing in the combined cell will locate different masters if they receive FCCHs of different primary BCCHs. BCCH, therefore, avoids the situation of time-frequency synchronization of the user equipment of the space division multiplexing, thereby effectively reducing the chance of SACCH collision of the user equipment of the space division multiplexing in the scenario of enabling the DTX, and greatly reducing the call drop rate caused by the SACCH collision. .

The above description is only an overview of the technical solutions of the present invention, and the above-described and other objects, features and advantages of the present invention can be more clearly understood. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments will be described in detail with reference to the accompanying drawings.

【附图说明】 [Description of the Drawings]

1 is a schematic structural diagram of an apparatus for reducing interference of a merged cell according to the present invention;

2 is a schematic structural diagram of another embodiment of an apparatus for reducing combined cell interference according to the present invention;

3 is a schematic structural diagram of still another embodiment of a device for reducing combined cell interference according to the present invention;

4 is a schematic structural diagram of an embodiment of a base station for reducing interference of a merged cell according to the present invention;

5 is a schematic structural diagram of an embodiment of a system for reducing combined cell interference according to the present invention;

6 is a schematic flow chart of an embodiment of a method for reducing interference of a merged cell according to the present invention;

7 is a schematic diagram of a structure of a radio frame in an application scenario according to an embodiment of a method for reducing combined cell interference according to the present invention;

FIG. 8 is a schematic structural diagram of still another embodiment of a device for reducing combined cell interference according to the present invention; FIG.

FIG. 9 is a schematic structural diagram of another embodiment of a base station for reducing combined cell interference according to the present invention.

【具体实施方式】【detailed description】

The technical solutions in the embodiments of the present invention are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present invention. It is obvious that the described embodiments are only a part of the embodiments of the present invention, but not all embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.

FIG. 1 is a schematic structural diagram of an apparatus for reducing interference of a merged cell according to the present invention. The device for reducing the interference of the merged cell may be part of the base station, or may be an external device other than the base station, and includes a configuration module 11 and a sending module 12.

The configuration module 11 is configured to configure at least two primary BCCHs of the same frequency point for the merged cell, and at least two primary BCCHs are distributed on different time slots. The merged cell includes at least two sectors, and the primary BCCH includes an FCCH. The control signaling of the merged cell carried by each primary BCCH is the same. The primary BCCH is a combination of multiple logical channels, rather than a single channel, and the FCCH is one of the logical channels. In this embodiment, optionally, the number of primary BCCHs is equal to the number of sectors, for example, the number of primary BCCHs and sectors is 4, but the present invention does not limit the number of primary BCCHs and sectors, and may also be Other quantities, even the number of primary BCCHs and the number of sectors may not be equal.

The sending module 12 is configured to send a signal corresponding to the at least two radio frames to the transmitting device, where the transmitting device performs the radio frame transmission, so that at least the first UE and the second UE located in the at least two sectors are respectively accessed differently. The main BCCH. The signals corresponding to at least two radio frames respectively carry a FCCH signal of the primary BCCH. After the transmitting device transmits at least two radio frames, the FCCH carried by each radio frame is not on the same numbered time slot, that is, as described above, at least two main BCCHs are distributed on different time slots. The radio frame is divided into a fixed number of time slots in the time domain, each time slot has a fixed number, and each time slot can only carry one logical channel. For example, the radio frame is usually divided into 8 time slots, 8 The time slots are numbered from 0 to 7. The FCCHs of at least two primary BCCHs are respectively located in different radio frames, and are located on different numbered time slots, that is, only one FCCH of the primary BCCH can exist in one radio frame, and the FCCHs of the remaining main BCCHs are located in other radio frames. Medium, and the FCCH of all primary BCCHs cannot be on the same time slot. After receiving the radio frame, the UE must receive and decode the FCCH before it can locate the main BCCH, that is, access the main BCCH. Optionally, the FCCH of one of the at least two primary BCCHs is on the time slot numbered 0, and of course, may not be on the time slot numbered 0.

Optionally, the primary BCCH also includes a synchronization channel (English: Synchronization) Channel, abbreviated: SCH), the sending module 12 is further configured to set a frame number of at least two radio frames in a SCH of each primary BCCH, where different radio frames in at least two radio frames respectively carry the same primary BCCH FCCH and SCH, and the FCCH and SCH carried by different radio frames are on the same numbered time slots, and the frame numbers set in the SCHs of different primary BCCHs are shifted from each other. Wherein, the FCCH and SCH of one primary BCCH are located in different radio frames, but are located on the same numbered time slot, for example, the FCCH of one primary BCCH is on a time slot numbered 0 of one radio frame, then the primary BCCH The SCH is on a time slot numbered 0 of another radio frame. After the UE locates the primary BCCH, it needs to decode the SCH to obtain the required information, including the frame number set in the SCH and the base station identification code (English: Base Station Identity Code, abbreviation: BSIC). Since the frame numbers set in the SCHs of different primary BCCHs are staggered from each other, the frame numbers acquired by different UEs may be different. The frame numbers are offset from each other. The frame numbers of the same radio frame set by the SCH of different primary BCCHs cannot be the same. For example, the frame number of the first radio frame sent by the merged cell in the SCH of one primary BCCH is 0, and the other is another. The frame number set by the SCH of the primary BCCH for the first radio frame transmitted by the merged cell is 3. Further, optionally, the merged cell groups a plurality of radio frames into one multiframe, and transmits the FCCH of the main BCCH in the same pattern in each multiframe.

Optionally, the primary BCCH also includes a BCCH and a common control channel (English: Common Control) CHannel, abbreviation: CCCH). The different radio frames of the at least two radio frames respectively carry the FCCH, BCCH, and CCCH of the same primary BCCH, and the FCCH, BCCH, and CCCH carried by the different radio frames are on the same numbered time slot. The FCCH, BCCH, and CCCH of one primary BCCH are located in different radio frames, but are located on the same numbered time slot. For example, the FCCH of one primary BCCH is on the time slot of a radio frame numbered 0, then the primary The BCCH and CCCH of the BCCH are respectively on the time slot numbered 0 of the other two radio frames. The BCCH and the CCCH contain all system messages that the UE needs to decode, and the UE needs to decode the system message to complete the cell camping.

Optionally, the radio frame carrying the FCCH of the primary BCCH in the at least two radio frames is repeatedly transmitted according to a predetermined period, and the other radio frame transmission between the radio frames of the FCCH carrying the same primary BCCH that are sent twice adjacently is carried. The radio frame of the FCCH of the remaining primary BCCH. For example, if the number of primary BCCHs is 4, and the radio frames carrying the FCCH of one primary BCCH are repeatedly transmitted at intervals of 9 radio frames, the 4 radio frames carrying the FCCHs of the remaining primary BCCHs are all at intervals. Sent in 9 radio frames. If the merged cell is transmitted in a multiframe manner, the FCCH, SCH, BCCH, and CCCH of the primary BCCH are transmitted in the same pattern in each multiframe. It should be specially noted that when the number of multiframes is 51, if the FCCH of one primary BCCH is transmitted in the first radio frame and the interval of repeated transmission is 9 radio frames, there is an exception, that is, the 50th radio. The frame needs to be empty due to the existing network, and no information is sent. Therefore, the FCCH originally transmitted in the 50th radio frame will be deferred until the 51st radio frame transmission.

In the device for reducing the interference of the merged cell in the embodiment of the present invention, the merged cell is configured with at least two primary BCCHs of the same frequency point, and the at least two radio frames that are sent carry one FCCH of the primary BCCH, and at least two radio frames The carried FCCH is not on the same numbered time slot, so that the UE performing space division multiplexing in the combined cell will locate different primary BCCHs if receiving FCCHs of different primary BCCHs, if the UEs performing space division multiplexing are different The time-searching network will receive different primary BCCHs, so the UEs performing space-division multiplexing will not synchronize on the time-frequency, which can effectively reduce the collision of the SACCH sent by the UE performing space-division multiplexing in the scenario of enabling DTX. The probability of solving the prior art problem can significantly improve the deterioration of the dropped call rate caused by the SACCH collision.

Referring to FIG. 2, it is a schematic structural diagram of another embodiment of an apparatus for reducing combined cell interference according to the present invention. The device for reducing the interference of the merged cell includes: a configuration module 21, a sending module 22, a receiving module 23, and a channel allocating module 24. The configuration module 21 has the same structure and function as the configuration module 11 shown in FIG. 1. The transmission module 22 has the same structure and function as the transmission module 12 shown in FIG. 1, and details are not described herein.

The receiving module 23 is configured to receive, by using the transmitting device, a channel request message sent by the first UE after accessing one of the at least two primary BCCHs; the first UE camps on the accessed after accessing one of the at least two primary BCCHs The cell corresponding to the primary BCCH needs to allocate radio resources by the base station. Therefore, the first UE sends a channel request message to the base station side to request to acquire radio resources and obtain a traffic channel to implement mobile communication. At this time, the receiving module 23 of the device that reduces the interference of the merged cell located at the base station side receives the channel request message.

The channel allocation module 24 is configured to allocate a traffic channel to the first UE according to the channel request message received by the receiving module 23. After being allocated to the traffic channel, the first UE can perform processing of various services, such as voice communication, data communication, and the like.

In order to further improve the deterioration of the call drop rate caused by the SACCH collision, the present invention further provides an apparatus for reducing the interference of the merged cell. Referring to FIG. 3, the apparatus for reducing the interference of the merged cell of the present invention is different from the previous embodiment in that the channel allocation module 34 further includes: an obtaining submodule 341, a first determining submodule 342, and a second determining sub Module 343.

The obtaining sub-module 341 is configured to acquire an idle traffic channel that the first UE can allocate after accessing one of the at least two primary BCCHs; the idle traffic channel that can be allocated refers to the first UE in the corresponding primary BCCH corresponding cell. The traffic channel is not used. It should be noted that, for the first UE, the traffic channel is idle, and the corresponding traffic channel of other cells may have been occupied by other UEs, such as the second UE. Of course, it may not be occupied by the second UE.

The first determining sub-module 342 is configured to determine a pending traffic channel in the idle traffic channel, where the pending traffic channel corresponds to a traffic channel occupied by the second UE accessing another of the at least two primary BCCHs, where the second UE is located The sector is different from the sector in which the first UE is located; as described above, for the first UE, it is an idle traffic channel, and the corresponding traffic channel of other cells may have been occupied by the second UE. The function of the first determining sub-module 342 is to find the traffic channel that has been occupied by the second UE from the traffic channel that is idle with respect to the first UE, and the second UE is limited to have been accessed. Another primary BCCH in one of the merged cells and camped on the cell corresponding to the other primary BCCH. And, the second UE is further defined to be a sector in which the sector is located different from the sector in which the first UE is located. The purpose is to enable the first UE to multiplex radio resources that have been allocated to the second UE in other sectors.

The second determining submodule 343 is configured to determine, in the pending traffic channel, that one traffic channel is allocated to the first UE. Since there may be more than one pending traffic channel that can be multiplexed by the first UE by the first determining submodule 242, one of the traffic channels needs to be selected for multiplexing. Of course, if only one of the pending traffic channels that can be multiplexed by the first UE is found, the second determining sub-module 343 allocates the one of the identified pending traffic channels to the first UE.

In the foregoing embodiment, after the operations of the obtaining sub-module 341, the first determining sub-module 342, and the second determining sub-module 343, the first UE and the second UE can respectively access different main BCCHs to prevent the two from being generated. The call drop rate deterioration caused by the SACCH collision, and the space division multiplexing of radio resources between different sectors is realized.

For example, in an application scenario, a merged cell includes an Alpha sector, a Beta sector, and a Gamma sector. The third UE, the second UE, and the first UE are respectively located in an Alpha sector, a Beta sector, and a Gamma sector. The third UE of the Alpha sector is accessed at the primary BCCH1, and the second UE of the Beta sector is accessed at the primary BCCH2. Then, if the first UE accessing from the primary BCCH1 from the gamma sector needs to be multiplexed, it needs to select and multiplex the radio resources occupied by the second UE. Since the first UE from the Gamma sector has selected to access from the primary BCCH1, according to the present invention, it needs to find the UE of the primary BCCH other than the cell in which the primary BCCH1 is located, such as the cell in which the primary BCCH2 is located, that is, located in the Beta sector. The second UE, because the second UE located in the Beta sector is not in the same sector as the first UE located in the Gamma sector, and the primary BCCH2 accessed by the second UE is also different from the primary BCCH1 accessed by the first UE. .

Of course, in other variant embodiments, the channel allocation module 34 may further include a third determining sub-module (not shown), and the third determining sub-module is configured to determine that the one idle traffic channel is allocated to the first UE, the one idle service. The channel is different from the channel occupied by any one UE after accessing at least two primary BCCHs.

Referring to FIG. 4, the present invention further provides an embodiment of a base station for reducing interference of a merged cell, where the merged cell includes at least two sectors, and the base station includes a configuration module 41, a sending module 42, and an antenna 43.

Antenna 43 is used to transmit radio frames.

The configuration module 41 is configured to configure at least two primary BCCHs of the same frequency point for the merged cell, and at least two primary BCCHs are distributed on different time slots, wherein the structure and function of the configuration module 41 and the configuration module 11 shown in FIG. Or the configuration module 21 shown in FIG. 2 has the same structure and function.

The sending module 42 is configured to send, to the antenna 43, a signal corresponding to at least two radio frames, so that the antenna 43 transmits at least two radio frames, and the at least two radio frames respectively carry a FCCH of the primary BCCH, so that at least At least a first UE and a second UE of the two sectors respectively access different primary BCCHs.

Referring to FIG. 5, the present invention also provides an embodiment of a system for reducing combined cell interference. The system for reducing combined cell interference includes an access control device 51, an antenna 52, a first UE 53, and a second UE. 54. The access control device 51 includes a configuration module 511 and a transmitting module 512. First UE 53 and second UE 54 is located in the merged cell. The functions and structures of the configuration module 511, the transmission module 512, and the antenna 52 shown in FIG. 5 are the same as those of the configuration module 41, the transmission module 42, and the antenna 43 shown in FIG.

Embodiments of the method for reducing combined cell interference according to the present invention are described below.

Referring to FIG. 6, which is a schematic flowchart of an embodiment of a method for reducing interference of a merged cell according to the present invention. Methods for reducing combined cell interference include:

S21: Configure at least two primary BCCHs of the same frequency point for the merged cell, and at least two primary BCCHs are distributed on different time slots.

The control signaling of the merged cell carried by each primary BCCH is the same because the frequency of the at least two primary BCCHs is the same. The primary BCCH is a combination of multiple logical channels, rather than a single channel, and the FCCH is one of the logical channels. In this embodiment, optionally, the number of primary BCCHs is equal to the number of sectors, for example, the number of primary BCCHs and sectors is 4, but the present invention does not limit the number of primary BCCHs and sectors, and may also be Other quantities, even the number of primary BCCHs and the number of sectors may not be equal.

S22: Send a signal corresponding to the at least two radio frames, where the signals corresponding to the at least two radio frames respectively carry an FCCH signal of the primary BCCH, so that at least the first UE and the second UE located in the at least two sectors respectively Access to different primary BCCHs.

The radio frame is divided into a fixed number of time slots in the time domain, each time slot has a fixed number, and each time slot can only carry one logical channel. For example, the radio frame is usually divided into 8 time slots, 8 The time slots are numbered from 0 to 7. The FCCHs of at least two primary BCCHs are respectively located in different radio frames, and are located on different numbered time slots, that is, only one FCCH of the primary BCCH can exist in one radio frame, and the FCCHs of the remaining main BCCHs are located in other radio frames. Medium, and the FCCH of all primary BCCHs cannot be on the same time slot. After the radio frame is transmitted, the UE must receive and decode the FCCH before receiving the radio frame sent by the merged cell to locate the main BCCH. Optionally, the FCCH of one of the at least two primary BCCHs is on a time slot numbered 0.

Optionally, the primary BCCH further includes a SCH, and the step of sending the at least two radio frames further includes: setting a frame number of the at least two radio frames in the SCH of each primary BCCH, where different wireless in the at least two radio frames The frames respectively carry the FCCH and the SCH of the same primary BCCH, and the FCCHs and SCHs carried by different radio frames are on the same numbered time slots, and the frame numbers set in the SCHs of different primary BCCHs are mutually offset.

Wherein, the FCCH and SCH of one primary BCCH are located in different radio frames, but are located on the same numbered time slot, for example, the FCCH of one primary BCCH is on a time slot numbered 0 of one radio frame, then the primary BCCH The SCH is on a time slot numbered 0 of another radio frame. After the UE locates the primary BCCH, it needs to decode the SCH to obtain the required information, including the frame number set in the SCH and the BSIC. Since the frame numbers set in the SCHs of different primary BCCHs are staggered from each other, the frame numbers acquired by different UEs may be different. The frame numbers are offset from each other. The frame numbers of the same radio frame set by the SCH of different primary BCCHs cannot be the same. For example, the frame number of the first radio frame sent by the merged cell in the SCH of one primary BCCH is 0, and the other is another. The frame number set by the SCH of the primary BCCH for the first radio frame transmitted by the merged cell is 3. Further, optionally, the merged cell groups a plurality of radio frames into one multiframe, and transmits the FCCH of the main BCCH in the same pattern in each multiframe.

Optionally, the primary BCCH further includes a BCCH and a CCCH. The different radio frames in the at least two radio frames respectively carry the FCCH, BCCH, and CCCH of the same primary BCCH, and the FCCH, BCCH, and CCCH carried by the different radio frames are on the same numbered time slot. The FCCH, BCCH, and CCCH of one primary BCCH are located in different radio frames, but are located on the same numbered time slot. For example, the FCCH of one primary BCCH is on the time slot of the number 0 of one radio frame, then the primary The BCCH and CCCH of the BCCH are respectively on the time slot numbered 0 of the other two radio frames. The BCCH and the CCCH contain all system messages that the UE needs to decode, and the UE needs to decode the system message to complete the cell camping.

In the access control method of the cell in the embodiment of the present invention, the merged cell is configured with at least two primary BCCHs of the same frequency point, and the at least two radio frames that are sent carry one FCCH of the primary BCCH, and at least two radio frames. The carried FCCH is not on the same numbered time slot, so that the UE performing space division multiplexing in the combined cell will locate different primary BCCHs if receiving FCCHs of different primary BCCHs, if the UEs performing space division multiplexing are different The time search network will receive different primary BCCHs, so that at least the first UE and the second UE located in at least two sectors respectively access different primary BCCHs.

Therefore, the UE performing the space division multiplexing does not synchronize on the time-frequency, and the SACCH transmitted by the UE performing the space division multiplexing can be effectively prevented from colliding in the scenario of enabling the DTX, thereby solving the problem of the prior art and improving significantly. The call drop rate deteriorates due to the SACCH collision.

Optionally, after the step S22, the method further includes: receiving a channel request message sent by the first UE after accessing one of the at least two primary BCCHs; and allocating a traffic channel to the first UE according to the channel request message received by the receiving module.

Optionally, the step of allocating a traffic channel to the first UE includes: acquiring an idle traffic channel that the first UE can allocate after accessing one of the at least two primary BCCHs; and determining a pending traffic channel in the idle traffic channel, where The pending traffic channel corresponds to a traffic channel occupied by the second UE after accessing at least two of the two primary BCCHs, wherein the second UE and the first UE are in different sectors; and at least one traffic channel is determined to be allocated to the pending traffic channel. First UE.

Optionally, in determining a traffic channel, determining that a traffic channel is not occupied by a channel corresponding to a UE that accesses all remaining primary BCCHs.

Referring to FIG. 7, FIG. 7 is a schematic diagram showing the structure of a radio frame in an application scenario according to an access control method according to an embodiment of the present invention. In this application scenario, the merged cell is obtained by combining four sectors using the same frequency point, and the merged cell is configured with four primary BCCHs of the same frequency point, which is equivalent to setting four logical cells with the same coverage area. The four main BCCHs are represented by primary BCCH1, primary BCCH2, primary BCCH3, and primary BCCH4, respectively. The illustration shows a multiframe transmitted by the merged cell. The first radio frame in the multiframe is represented by F1, the second radio frame is represented by F2, the third radio frame is represented by F3, and so on, and only 17 radio frames in the multiframe are shown schematically. Each radio frame is divided into 8 time slots, which are represented by TS0, TS1, TS2, TS3, TS4, TS5, TS6 and TS7, respectively.

Carrying the FCCH of the primary BCCH1 in the time slot TS0 of the radio frame F1 transmitted by the merged cell, carrying the SCH of the primary BCCH1 in the time slot TS0 of the radio frame F2, and carrying the radio frame of the FCCH and SCH of the primary BCCH1 with 9 radio frames The transmission is repeated for the interval, that is, the FCCH of the primary BCCH1 is carried in the time slot TS0 of the radio frame F11, and the SCH of the primary BCCH1 is carried in the time slot TS0 of the radio frame F12. The BCCH and CCCH of the primary BCCH1 are transmitted in the time slot TS0 of the radio frame other than the radio frame carrying the FCCH and SCH of the primary BCCH1.

Carrying the FCCH of the primary BCCH2 in the time slot TS1 of the radio frame F3 transmitted by the merged cell, carrying the SCH of the primary BCCH2 in the time slot TS1 of the radio frame F4, and carrying the radio frame of the FCCH and SCH of the primary BCCH2 with 9 radio frames Repeatedly sent for the interval. The BCCH and CCCH of the primary BCCH2 are transmitted in the time slot TS1 of the radio frame other than the radio frame carrying the FCCH and SCH of the primary BCCH2.

Carrying the FCCH of the primary BCCH3 in the time slot TS3 of the radio frame F5 transmitted by the merged cell, carrying the SCH of the primary BCCH3 in the time slot TS3 of the radio frame F6, and carrying the radio frame of the FCCH and SCH of the primary BCCH3 with 9 radio frames Repeatedly sent for the interval. The BCCH and CCCH of the primary BCCH3 are transmitted in the time slot TS3 of the radio frame other than the radio frame carrying the FCCH and SCH of the primary BCCH3.

The FCCH of the primary BCCH4 is carried in the time slot TS5 of the radio frame F8 transmitted by the merged cell, the SCH of the primary BCCH4 is carried in the time slot TS5 of the radio frame F9, and the radio frame carrying the FCCH and SCH of the primary BCCH4 is 9 radio frames. Repeatedly sent for the interval. The BCCH and CCCH of the primary BCCH 4 are transmitted in the time slot TS5 of the radio frame other than the radio frame carrying the FCCH and SCH of the primary BCCH 4.

It should be noted that the radio frame carrying the FCCH of each primary BCCH is not only repeatedly transmitted according to a predetermined period, but also other radio frames transmitted between the adjacent two radio frames of the FCCH carrying the same primary BCCH are carried. Radio frame of the FCCH of the BCCH. For example, the radio frames of the FCCH carrying the primary BCCH1 sent twice adjacently are the radio frame F1 and the radio frame F11, the radio frame carrying the FCCH of the main BCCH2 is the radio frame F3, and the radio frame carrying the FCCH of the main BCCH3 is the radio frame F5. The radio frame carrying the FCCH of the primary BCCH 4 is the radio frame F8, and the radio frame F3, the radio frame F5, and the radio frame F8 are both between the radio frame F1 and the radio frame F11.

The frame number of each radio frame is set in the SCH of each main BCCH. As shown in FIG. 7, the radio frame F1 frame number is set to 0 in the SCH of the primary BCCH1, the frame number of the radio frame F3 is set to 0 in the SCH of the main BCCH2, and the radio frame F5 is set in the SCH of the main BCCH3. The frame number is set to 0, and the frame number of the radio frame F8 is set to 0 in the SCH of the main BCCH 4, so that the frame numbers set in the SCH in each main BCCH are shifted from each other.

When the UEs in different sectors in the combined cell perform space division multiplexing, each UE may search for a network at different times, and it is assumed that one UE performing space division multiplexing searches when the combined cell transmits the time slot TS4 of the radio frame F2. Network, then the time slot TS5 to TS7 of the radio frame F2 that the UE will receive next, and the time slot TS0 of the radio frame F3, during which time no FCCH of any primary BCCH is received until the radio frame F3 is received The time slot TS1 receives the FCCH of the primary BCCH2, then the UE will be located on the primary BCCH2, and the time slot TS1 of the received radio frame thereafter is considered to be the required channel. That is, the UE will receive the SCH of the primary BCCH2 in the time slot TS1 of the radio frame F4, thereby acquiring the frame number of the radio frame for cell synchronization, and receiving the BCCH and CCCH in the time slot TS1 of the other radio frame to acquire the system message of the merged cell. Perform cell resident.

Another UE performing space division multiplexing searches for the network when the combined cell transmits the time slot TS6 of the radio frame F4, and according to the above description, the UE will locate the main BCCH3 according to the FCCH received from the time slot TS3 of the radio frame F5. And complete the subsequent cell synchronization and cell resident process. The frame number and the time slot are not synchronized, and the SACCH sent by the UE performing the space division multiplexing does not occur in the scenario of enabling DTX. Collision will not cause the call drop rate of the merged cell to deteriorate.

FIG. 8 is a schematic structural diagram of another embodiment of an apparatus for reducing interference of a merged cell according to the present invention. The device for reducing the interference of the merged cell includes a processor 81, a memory 82, and a bus 83. And communication interface (communication Interface) 84. The processor 81, the memory 82, and the communication interface 84 are connected to one another via a bus 83. The communication interface 84 is configured to be connected to the antenna of the base station. The antenna here may include a modulation circuit, an amplifying circuit, or the like, or may not include a modulation circuit, an amplifying circuit, etc., for an antenna including a modulation circuit or the like, the communication interface 84 may be directly connected to the antenna. For an antenna that does not include a modulation circuit or the like, the communication interface 84 can be indirectly connected to the antenna through a modulation circuit or the like.

Bus 83 can be a peripheral component interconnect standard (English: Peripheral Component Interconnect, abbreviation: PCI) bus or extended industry standard structure (English: Extended Industry Standard Architecture, abbreviation: EISA) bus, etc. The bus can be divided into an address bus, a data bus, a control bus, and the like. For ease of representation, only one thick line is shown in Figure 8, but it does not mean that there is only one bus or one type of bus.

The memory 82 is used to store programs. In particular, the program can include program code, the program code including computer operating instructions. Memory 82 may contain high speed random access memory (English: random-access Memory, abbreviation: RAM) memory, may also include non-volatile memory (English: non-volatile memory, abbreviated: NVM), such as at least one disk storage.

The processor 81 can be a central processing unit (English: central processing) Unit, abbreviation: CPU).

The processor 81 executes the program stored in the memory 82, and is used to implement the access control method provided by the embodiment of the present invention, including:

Configuring at least two primary BCCHs of the same frequency point for the merged cell, at least two primary BCCHs are distributed on different time slots, wherein the merged cell includes at least two sectors;

Sending a signal corresponding to at least two radio frames to the antenna, and transmitting, by the antenna, at least two radio frames, where at least two radio frames respectively carry a FCCH of the primary BCCH, and the FCCHs carried by the at least two radio frames are not in the same number. On the time slot.

Optionally, the number of primary BCCHs is equal to the number of sectors. The FCCH of one of the at least two primary BCCHs is on a time slot numbered 0.

Optionally, the primary BCCH further includes a BCCH and a CCCH, and different radio frames of the at least two radio frames respectively carry the FCCH, the BCCH, and the CCCH of the same primary BCCH, and the FCCH, the BCCH, and the CCCH carried by the different radio frames are the same. Numbered on the time slot.

Optionally, the radio frame carrying the FCCH of the primary BCCH in the at least two radio frames is repeatedly transmitted according to a predetermined period, and the other radio frame transmission between the radio frames of the FCCH carrying the same primary BCCH that are sent twice adjacently is carried. The radio frame of the FCCH of the remaining primary BCCH.

For the specific implementation process of the processor 41, refer to the device and the access control method for reducing the interference of the merged cell in the foregoing embodiment, and details are not described herein again.

Referring to FIG. 9, FIG. 9 is a schematic structural diagram of another embodiment of a base station for reducing combined cell interference according to the present invention. The base station that reduces the interference of the merged cell is based on the device for reducing the interference of the merged cell shown in FIG. 8. The antenna 95 is added, and the communication interface 84 is connected to the antenna 95. The signals corresponding to at least two radio frames generated by the processor 81 running the program are transmitted to the antenna 95, and the antenna 95 transmits at least two radio frames.

In the several embodiments provided by the present invention, it should be understood that the disclosed system, apparatus and method may be implemented in other manners. For example, the device embodiments described above are merely illustrative. For example, the division of modules or units is only a logical function division. In actual implementation, there may be another division manner, for example, multiple units or components may be combined or Can be integrated into another system, or some features can be ignored or not executed. Alternatively, the coupling or direct coupling or communication connection to each other may be an indirect coupling or communication connection through some interface, device or unit, and may be in electrical or other form.

The units described as separate components may or may not be physically separate, and the components displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above integrated unit can be implemented in the form of hardware or in the form of a software functional unit.

An integrated unit, if implemented in the form of a software functional unit and sold or used as a standalone product, can be stored in a computer readable storage medium. Based on such understanding, all or part of the technical solution of the present invention may be embodied in the form of a software product stored in a storage medium, including a plurality of instructions for causing a computer device (which may be a personal computer, The management server, or network device, etc. or processor, performs all or part of the steps of the various embodiments of the present invention. The foregoing storage medium includes: a U disk, a mobile hard disk, and a read only memory (English: read-only Memory, abbreviation: ROM), random access memory (English: Random Access Memory, abbreviation: RAM), a disk or a disc, and other media that can store program code.

The above are only the embodiments of the present invention, and are not intended to limit the scope of the invention, and the equivalent structure or equivalent process transformations made by the description of the present invention and the drawings are directly or indirectly applied to other related technical fields. The same is included in the scope of patent protection of the present invention.

Claims

A device for reducing interference of a merged cell, where the merged cell includes at least two sectors, and the device includes:

a configuration module, configured to configure, for the merged cell, at least two primary broadcast control channels BCCH of the same frequency point, where the at least two primary BCCHs are distributed on different time slots;

a sending module, configured to send a signal corresponding to the at least two radio frames, where the signals corresponding to the at least two radio frames respectively carry a frequency correction channel FCCH signal of the primary BCCH, so that the signals are located in the at least two sectors At least the first user equipment UE and the second UE respectively access different primary BCCHs.
The device according to claim 1, wherein the device further comprises:

a receiving module, configured to receive a channel request message sent by the first UE after accessing one of the at least two primary BCCHs;

And a channel allocation module, configured to allocate a traffic channel to the first UE according to the channel request message received by the receiving module.
The device according to claim 2, wherein the channel allocation module comprises: an obtaining submodule, a first determining submodule, and a second determining submodule,

The acquiring submodule is configured to acquire an idle traffic channel that the first UE can allocate after accessing one of the at least two primary BCCHs;

The first determining submodule is configured to determine a pending traffic channel in the idle traffic channel, where the to-be-determined traffic channel is occupied by the second UE after accessing another of the at least two primary BCCHs Traffic channel, the second UE and the first UE are in different sectors;

The second determining submodule is configured to determine, in the to-be-determined traffic channel, that at least one traffic channel is allocated to the first UE.
The device according to claim 2, wherein the channel allocation module comprises: a third determining submodule,

The third determining submodule is configured to determine that the at least one idle traffic channel is allocated to the first UE, where the at least one idle traffic channel is different from any other UE in the merged cell, accessing the at least one The channel occupied by the two primary BCCHs.
A base station for reducing interference of a merged cell, where the merged cell includes at least two sectors, wherein the base station includes:

An antenna for transmitting a radio frame;

a configuration module, configured to configure, for the merged cell, at least two BCCHs of the same frequency point, where the at least two primary BCCHs are distributed on different time slots;

a sending module, configured to send, to the antenna, a signal corresponding to at least two radio frames, so that the antenna transmits the at least two radio frames, and the at least two radio frames respectively carry a FCCH of a primary BCCH, So that at least the first UE and the second UE located in the at least two sectors respectively access different primary BCCHs.
The base station according to claim 5, wherein the base station comprises:

a receiving module, configured to receive a channel request message sent by the first UE after accessing one of the at least two primary BCCHs;

And a channel allocation module, configured to allocate a traffic channel to the first UE according to the channel request message received by the receiving module.
A method for reducing interference of a merged cell, where the merged cell includes at least two sectors, and includes:

Configuring at least two BCCHs of the same frequency point for the combined cell, the at least two primary BCCHs being distributed on different time slots;

Transmitting a signal corresponding to the at least two radio frames, where the signals corresponding to the at least two radio frames respectively carry an FCCH signal of the primary BCCH, so that at least the first UE and the second located in the at least two sectors The UE accesses different primary BCCHs respectively.
The method of claim 7 wherein:

The step of transmitting the signal corresponding to the at least two radio frames includes:

Receiving a channel request message sent by the first UE after accessing one of the at least two primary BCCHs;

And allocating a traffic channel to the first UE according to the channel request message received by the receiving module.
The method of claim 8 wherein:

The step of allocating a traffic channel for the first UE includes:

Obtaining an idle traffic channel that the first UE can allocate after accessing one of the at least two primary BCCHs;

Determining a pending traffic channel in the idle traffic channel, where the to-be-determined traffic channel corresponds to a traffic channel occupied by the second UE after accessing another of the at least two primary BCCHs, the second UE and The first UE is in different sectors;

Determining, in the pending traffic channel, at least one traffic channel is allocated to the first UE.
The method of claim 8 wherein:

The step of allocating a traffic channel for the first UE includes:

Determining that the at least one idle traffic channel is allocated to the first UE, the at least one idle traffic channel being different from a channel occupied by any one of the merged cells after accessing the at least two primary BCCHs.
A system for reducing interference of a merged cell, comprising:

At least a first UE and a second UE that are located in the merged cell;

An antenna for transmitting a radio frame;

The access control device includes a configuration module and a sending module, where the configuration module is configured to configure at least two BCCHs of the same frequency point for the merged cell, where the at least two primary BCCHs are distributed on different time slots; The module is configured to send, to the antenna, a signal corresponding to at least two radio frames, so that the antenna transmits the at least two radio frames, and the at least two radio frames respectively carry a FCCH signal of a primary BCCH, And causing at least the first UE and the second UE located in the at least two sectors to access different primary BCCHs, respectively.
The system according to claim 11, wherein the access control device further comprises:

a receiving module, configured to receive a channel request message sent by the first UE after accessing one of the at least two primary BCCHs;

And a channel allocation module, configured to allocate a traffic channel to the first UE according to the channel request message received by the receiving module.
The system according to claim 12, wherein the channel allocation module comprises: an obtaining submodule, a first determining submodule, and a second determining submodule;

The acquiring sub-module is configured to acquire an idle traffic channel that the first UE can allocate after accessing one of the at least two primary BCCHs;

The first determining submodule is configured to determine a pending traffic channel in the idle traffic channel, where the to-be-determined traffic channel is occupied by the second UE after accessing another of the at least two primary BCCHs Traffic channel, the second UE and the first UE are in different sectors;

The second determining submodule is configured to determine, in the to-be-determined traffic channel, that at least one traffic channel is allocated to the first UE.
The system according to claim 12, wherein said channel allocation module comprises a third determining sub-module;

The third determining submodule is configured to determine that the at least one idle traffic channel is allocated to the first UE, where the at least one idle traffic channel is different from any other UE in the merged cell, accessing the at least two The channel occupied by the primary BCCH.
A device for reducing interference of a merged cell, where the merged cell includes at least two sectors, and the device includes:

a processor, a memory, a bus, and a communication interface, wherein the processor, the memory, and the communication interface are connected to each other through the bus;

The memory is used to store a program;

The processor is configured to execute a program stored in the memory, to configure at least two primary broadcast control channels BCCH of the same frequency point for the merged cell, where the at least two primary BCCHs are distributed on different time slots; The bus and the communication interface send signals corresponding to the at least two radio frames, and the signals corresponding to the at least two radio frames respectively carry an FCCH signal of the primary BCCH, so that at least the first one of the at least two sectors The UE and the second UE respectively access different primary BCCHs.
A base station for reducing interference of a merged cell, where the merged cell includes at least two sectors, wherein the base station includes:

An antenna, a processor, a memory, a bus, and a communication interface, wherein the processor, the memory, and the communication interface are connected to each other by the bus, and the communication interface is connected to the antenna;

The memory is used to store a program;

The processor is configured to execute a program stored in the memory, to configure at least two primary BCCHs of the same frequency point for the merged cell, the at least two primary BCCHs are distributed on different time slots; and sequentially pass the bus and communicate The interface sends a signal corresponding to the at least two radio frames to the antenna, where the signals corresponding to the at least two radio frames respectively carry an FCCH signal of the primary BCCH, so that at least the at least two of the at least two sectors are located. A UE and a second UE respectively access different primary BCCHs.