CN102256332A - Interference coordination method and system - Google Patents
Interference coordination method and system Download PDFInfo
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- CN102256332A CN102256332A CN2011102067214A CN201110206721A CN102256332A CN 102256332 A CN102256332 A CN 102256332A CN 2011102067214 A CN2011102067214 A CN 2011102067214A CN 201110206721 A CN201110206721 A CN 201110206721A CN 102256332 A CN102256332 A CN 102256332A
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- pcfich
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Abstract
The invention discloses an interference coordination method and an interference coordination system. The method comprises the following step of: when the interference of a physical control format indication channel (PCFICH) exceeds a preset index, transmitting the control format indication (CFI) information originally transmitted through the PCFICH through an idle bit in a main information block (MIB) in a physical broadcast channel (PB CH). Due to the technical scheme, the CFI information can be accurately decoded in an interfered cell.
Description
Technical field
The present invention relates to the mobile communication technology field, particularly relate to a kind of disturbance coordination method and a kind of interference coordination system.
Background technology
Long Term Evolution (LTE, Long Term Evolution) heterogeneous network (HetNet of network, Heterogeneous) problem that exists Physical Control Format Indicator Channel (PCFICH, Physical Control Format Indication Channel) to disturb in.
The interference coordination scene of LTE HetNet comprises two kinds among the R10: Macro-Pico and Macro-Femto.Macro-Pico is a scene of laying Hot Spot (Pico Cell) in macrocell (Macro Cell) coverage; Macro-Femto is a scene of laying Home eNodeB (Home eNB is also referred to as Femto) in the macrocell coverage area.
Main interference in above-mentioned two kinds of scenes is respectively: among the Macro-Pico, the Pico UE at Pico covering edge will be subjected to the interference of Macro; Among the Macro-Femto, Femto causes interference to the Macro UE user who enters its coverage.
Two kinds of interference all are on down link.The method that solves the interference of these two kinds of scenes in the prior art is to adopt almost blank subframe (ABS, Almost Blank Frame) method.Be that example describes the ABS method with the Macro-Pico scene below.
Fig. 1 is the distribution contrast schematic diagram of the video resource of Macro sub-district and Pico sub-district under the Macro-Pico scene.In Fig. 1, use
Expression message reference signal (CRS, Cell-specific Reference Signal) is used
Expression down control channel (DL Control) is used
The expression data channel is used
Expression blank (Null).As shown in Figure 1, it is the ABS subframe that Macro is provided with its some descending sub frame, in these subframes except CRS, other signal and channel all cannot pass, these Macro ABS subframes are to the interference reduction (compare and do not adopt ABS) of the subframe of corresponding Pico, the Pico UE that is disturbed is dispatched on the subframe of ABS correspondence and works, reduced by the interference of interference user.
But ABS is not blank fully subframe, and CRS is wherein still keeping, and exists such as the CRS in first symbol in the ABS subframe of Macro among the top figure always.On the other hand, Physical Control Format Indicator Channel (PCFICH, Physical Control Format Indication Channel) is on first symbol of each subframe.Comprise control format indication (CFI among the PCFICH, Control Format Indication) information, this information is used for indicating a subframe, the symbolic number that PDCCH takies, only obtain correct CFI and could further detect Physical Downlink Control Channel (PDCCH, and then the Physical Downlink Shared Channel of further decoding (PDSCH, Physical Downlink Shared Channel) Physical Downlink Control Channel).Can so be correctly decoded PCFICH be the essential step of system's operate as normal.
As seen, because the CRS of the AB S subframe of Macro and be present in simultaneously on first symbol of subframe by the PCFICH of interfered cell, so the CRS that leaves among the ABS still has interference to the PCFICH of disturbed sub-district, and consequence is the direct operate as normal of the disturbed sub-district of influence.
Summary of the invention
The invention provides a kind of disturbance coordination method, this method makes and is subjected to interfered cell can be correctly decoded CFI information.
The present invention also provides a kind of interference coordination system, and this system makes and is subjected to interfered cell can be correctly decoded CFI information.
For achieving the above object, technical scheme of the present invention is achieved in that
The invention discloses a kind of disturbance coordination method, this method is used for the heterogeneous network of Long Term Evolution LTE, and this method comprises:
When the suffered interference of Physical Control Format Indicator Channel PCFICH surpasses default index, by the control format indication CFI information of PCFICH transmission, transmitted by the idle bit among the Master Information Block MIB among the Physical Broadcast Channel PBCH with originally.
In said method, the described transmission by the idle bit among the Master Information Block MIB among the Physical Broadcast Channel PBCH comprises: transmit by two idle bits among the MIB among the PBCH.
In said method, have only after having adopted almost blank subframe ABS disturbance coordination method, when the suffered interference of PCFICH still surpassed default index, just the CFI information that will transmit by PCFICH was originally transmitted by the idle bit among the MIB among the PBCH.
The invention also discloses a kind of interference coordination system, this system comprises: evolution base station eNB and user equipment (UE), wherein:
ENB, be used for when the suffered interference of Physical Control Format Indicator Channel PCFICH surpasses default index,, transmitted by the control format indication CFI information of PCFICH transmission originally by the idle bit among the Master Information Block MIB among the Physical Broadcast Channel PBCH;
UE is used for reading CFI information from the MIB of PBCH.
In said system, eNB is used for CFI information is transmitted by two idle bits among the MIB of PBCH.
In said system, eNB is used for after having adopted almost blank subframe ABS disturbance coordination method, and when the suffered interference of PCFICH still surpassed default index, just the CFI information that will transmit by PCFICH was originally transmitted by the idle bit among the MIB among the PBCH
By as seen above-mentioned, the present invention is this when the suffered interference of FICH surpasses default index, with the CFI information of transmitting by PCFICH originally, carry out technical scheme of transmission by the idle bit among the MIB among the PBCH, because the performance of PBCH can be guaranteed in actual applications, therefore can guarantee the CFI transmission of Information, make to be subjected to interfered cell can be correctly decoded CFI information.
Description of drawings
Fig. 1 is the distribution contrast schematic diagram of the video resource of Macro sub-district and Pico sub-district under the Macro-Pico scene;
Fig. 2 is the schematic diagram of a kind of interference coordination system in the embodiment of the invention.
Embodiment
In actual applications, although the PCFICH channel has interference, still can guarantee by the performance of the Physical Broadcast Channel (PB CH, Physical Broadcast Channel) of interfered cell.PBCH is received in when adopting the ABS interference coordination, can guarantee the performance that PB CH receives such as subframe skew (Subframe Offset) by other existing methods.
Therefore, adopt following scheme in the present invention: when the suffered interference of PCFICH surpasses default index, by the CFI information of PCFICH transmission, transmitted by the idle bit among the MIB among the PBCH with originally.
10 idle bits are arranged among the MIB that comprises among the PBCH, and the concrete form of MIB is as follows:
The part of above-mentioned overstriking is represented 10 idle bits.The possible value of CFI is 1,2,3,4 to represent that respectively PDCCH takies 1,2 in the subframe, 3,4 symbols.Can use two idle bits among the MIB to represent these information.Such as 2 bits of the lowest order in 10 idle bits that utilize among the MIB, the different conditions of these 2 bits is 4 kinds of values of corresponding CFI respectively, and a kind of corresponding relation is as follows:
MIB CFI
00： 1
01： 2
10： 3
11： 4
Other values: invalid
Like this, CFI is transmitted by PBCH, the performance of the CFI that then decodes is equal to the performance of the PBCH that decodes.
For effective usage space resource, alleviate signaling traffic load, UE there is no need to go all the time to understand the idle mib information among the above-mentioned PBCH, only when UE needs interference coordination, and after having adopted ABS, when the performance of PCFICH still can not be accepted, just need go to read these information.For network side, idle MIB bit only just need be used in disturbed sub-district when using the ABS interference coordination, broadcast then.Promptly, in one embodiment of the invention: have only after having adopted almost blank subframe ABS disturbance coordination method, the suffered interference of PCFICH still surpasses when presetting index, just will transmit by the idle bit among the MIB among the PBCH originally by the CFI information of PCFICH transmission.
Fig. 2 is the schematic diagram of a kind of interference coordination system in the embodiment of the invention.As shown in Figure 2, this system comprises: evolution base station eNB and user equipment (UE), wherein:
ENB, be used for when the suffered interference of Physical Control Format Indicator Channel PCFICH surpasses default index,, transmitted by the control format indication CFI information of PCFICH transmission originally by the idle bit among the Master Information Block MIB among the Physical Broadcast Channel PBCH;
UE is used for reading CFI information from the MIB of PBCH.
Wherein, eNB is used for CFI information is transmitted by two idle bits among the MIB of PBCH.
ENB is used for after having adopted almost blank subframe ABS disturbance coordination method, and when the suffered interference of PCFICH still surpassed default index, just the CFI information that will transmit by PCFICH was originally transmitted by the idle bit among the MIB among the PBCH.
In sum, the present invention is this when the suffered interference of FICH surpasses default index, with the CFI information of transmitting by PCFICH originally, carry out technical scheme of transmission by the idle bit among the MIB among the PBCH, because the performance of PBCH can be guaranteed in actual applications, therefore can guarantee the CFI transmission of Information, make to be subjected to interfered cell can be correctly decoded CFI information.This method has been utilized the original idle bit of MIB, does not therefore need to increase extra signaling bit.In addition, the MIB idle bit is not needed to take always, only make when AB S interference coordination can not solve the interference problem of PCFICH and just need take, therefore can control the signaling traffic load of PBCH broadcasting effectively.
The above only is preferred embodiment of the present invention, and is in order to restriction the present invention, within the spirit and principles in the present invention not all, any modification of being made, is equal to replacement, improvement etc., all should be included within the scope of protection of the invention.
Claims (7)
1. disturbance coordination method, this method is used for the heterogeneous network of Long Term Evolution LTE, it is characterized in that, and this method comprises:
When the suffered interference of Physical Control Format Indicator Channel PCFICH surpasses default index, by the control format indication CFI information of PCFICH transmission, transmitted by the idle bit among the Master Information Block MIB among the Physical Broadcast Channel PBCH with originally.
2. method according to claim 1 is characterized in that, the described transmission by the idle bit among the Master Information Block MIB among the Physical Broadcast Channel PBCH comprises:
Transmit by two idle bits among the MIB among the PBCH.
3. method according to claim 1 and 2, it is characterized in that, have only after having adopted almost blank subframe ABS disturbance coordination method, the suffered interference of PCFICH still surpasses when presetting index, just will transmit by the idle bit among the MIB among the PBCH originally by the CFI information of PCFICH transmission.
4. method according to claim 3 is characterized in that,
Adopt the subframe offset method to guarantee the performance that PBCH receives.
5. an interference coordination system is characterized in that, this system comprises: evolution base station eNB and user equipment (UE), wherein:
ENB, be used for when the suffered interference of Physical Control Format Indicator Channel PCFICH surpasses default index,, transmitted by the control format indication CFI information of PCFICH transmission originally by the idle bit among the Master Information Block MIB among the Physical Broadcast Channel PBCH;
UE is used for reading CFI information from the MIB of PBCH.
6. system according to claim 5 is characterized in that,
ENB is used for CFI information is transmitted by two idle bits among the MIB of PBCH.
7. according to claim 5 or 6 described systems, it is characterized in that,
ENB is used for after having adopted almost blank subframe ABS disturbance coordination method, and when the suffered interference of PCFICH still surpassed default index, just the CFI information that will transmit by PCFICH was originally transmitted by the idle bit among the MIB among the PBCH.
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| WO2013102407A1 (en) * | 2012-01-04 | 2013-07-11 | 中国移动通信集团公司 | Method, device, and system for machine terminal communication |
| CN103220762A (en) * | 2012-01-19 | 2013-07-24 | 上海贝尔股份有限公司 | Method and device for regulating macrocell almost blank subframe (ABS) transmission power accepted by user equipment (UE) |
| WO2014071613A1 (en) * | 2012-11-09 | 2014-05-15 | 富士通株式会社 | Information configuration method, information transmission method, detection method and device and system thereof |
| WO2015018064A1 (en) * | 2013-08-09 | 2015-02-12 | 华为技术有限公司 | Dynamic resource block allocation method, apparatus, base station and system |
| CN107466098A (en) * | 2012-08-30 | 2017-12-12 | Zte维创通讯公司 | It is a kind of for the method and apparatus for the radio communication realized in heterogeneous network |
| CN109905200A (en) * | 2013-09-13 | 2019-06-18 | 华为技术有限公司 | A kind of method, apparatus and system of information transmission |
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| CN102256332B (en) | 2015-03-25 |
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Effective date of registration: 20170830 Address after: 100070, No. 188, building 25, No. eighteen, South Fourth Ring Road, Fengtai District, Beijing, 1, 101 Patentee after: Beijing Haiyun Technology Co. Ltd. Address before: 510663, No. 3, color road, Science City, Guangzhou Development Zone, Guangdong Patentee before: New Post Communication Equipment Co., Ltd. |
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