CN101056118B - A method for sharing the information of the adjacent cells in the multi-cell joint detection - Google Patents
A method for sharing the information of the adjacent cells in the multi-cell joint detection Download PDFInfo
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- CN101056118B CN101056118B CN2006100728955A CN200610072895A CN101056118B CN 101056118 B CN101056118 B CN 101056118B CN 2006100728955 A CN2006100728955 A CN 2006100728955A CN 200610072895 A CN200610072895 A CN 200610072895A CN 101056118 B CN101056118 B CN 101056118B
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Abstract
The present invention relates to the field of communication network, especially relates to the third generation communication, specifically, the present invention provides a method of sharing information of adjacent cell in the multi-cell combination detecting process. The present invention includes the steps as follows to solve the problem of interference among cells: a wireless network controller or the local maintaining terminal of the cell node B or the control maintaining center transmits static information of the adjacent cell to each cell node B; the wireless network controller transmits the static information and user terminal information of at least one adjacent cell of the local cell to each node B; the local cell node B stories the static information and user terminal information of the adjacent cell in the core control board of the local cell node B. The good effects of the present invention reside in that: the information of the adjacent cells can be shared without changing the current system structure, and a foundation of the multi-cell combination detecting is provide, and the performance of the multi-cell combination detecting is improved with a low cost.
Description
Technical field
The present invention relates to communication network field, particularly the third generation communications field is a kind of method of sharing adjacent cell information in multi-plot joint detects concretely.
Background technology
The Chinese implication of TD-SCDMA is that TD SDMA inserts, this communication technology also belongs to a kind of technical standard of radio communication, it is to be proposed for the first time and worked with international partners on the basis of this Radio Transmission Technology (RTT) by China, finished the TD-SCDMA standard, become a member of CDMA TDD mode (CDMA TDD) standard, this is an invention of China Mobile circle, also is the contribution of China to the 3G (Third Generation) Moblie development.With the competition of Europe, the 3G standard that proposes separately of the U.S. in, the TD-SCDMA that China proposes formally becomes one of global 3G standard, this indicates that China has entered row advanced in the world at moving communicating field.
TD-SCDMA has adopted state-of-the-art technologies such as smart antenna, joint-detection, dynamic channel allocation, baton handover and software radio, is a FA 3G system.3G network can independently be set up fully in the TD-SCDMA system, and satisfy fully International Telecommunication Union and third generation partner program (3GPP) to covering, coexistence of systems, the support high-speed mobile of 3G system, the requirement of aspects such as high data rate is provided.By adopting new and improved technology, TD-SCDMA ability in these areas can be further improved.
The factor that influences a mobile communication system networking capability comprises the antijamming capability of system, switching, covering power, to support of high mobility and high data rate etc.Cdma system is an interference-limited system, but the TD-SCDMA system has adopted interference such as smart antenna, associated detection technique, uplink synchronous and dynamic channel allocation to suppress and has hidden technology, interference is weakened greatly to the influence of TD-SCDMA systematic function, under many circumstances, the TD-SCDMA system is resource-constrained system.
Although the spreading code in the TD-SCDMA system is a quadrature, the time delay disperse meeting of wireless channel causes the interference MAI between intersymbol interference and multi-user, can eliminate interference among multiple users and intersymbol interference by adopting joint-detection and smart antenna.Uplink synchronous can reduce the interference between the up user and the performance loss of joint-detection.Therefore, the performance of TD-SCDMA system mainly is subjected to the influence of presence of intercell interference.
In the TD-SCDMA system, different sub-districts adopts different scramblers to distinguish, and the user in the same sub-district adopts different orthogonal variable spread spectrum coefficient (OVSF) sign indicating numbers to distinguish the user.Owing to be not quadrature between the different scrambling codes,, bring the loss that detects performance so the signal of different sub-districts can the phase mutual interference.This interference is the principal element that influences the TD-SCDMA power system capacity.
A kind of method that improves the TD-SCDMA power system capacity is to adopt multi-plot joint to detect the interference of eliminating from neighbor cell, but multi-plot joint detects the relevant information just need obtain neighbor cell, and this information comprises information such as the resource that training sequence code, scrambler and this community user distribute etc.
Now, can only receive the information of own sub-district on the Node B (Node B) from radio network controller (RNC), this information comprises the information such as resource that training sequence code, scrambler and this community user distribute.
Summary of the invention
In order to overcome the above problems, the object of the present invention is to provide a kind of method of in multi-plot joint detects, sharing adjacent cell information, make Node B can obtain information static relatively in the neighbor cell, information such as training sequence code, scrambler and dynamic user, thereby can carry out joint-detection to a plurality of neighbor cells, solve the interference between many sub-districts.
A kind of method of in multi-plot joint detects, sharing adjacent cell information:
Step 1, the static information of storage sub-district and the community user end message that is used for joint-detection in radio network controller; Described sub-district static information comprises: training sequence code, scrambler and sub-district ID;
Step 2, to the static information of at least one neighbor cell of each Node B transmission home cell and the user terminal information of neighbor cell, the trigger condition of described transmission is by radio network controller:
Send the static information of the neighbor cell of home cell to the sub-district Node B by radio network controller, when the interference that detects the neighbor cell user terminal according to the static information of neighbor cell when the physical layer of home cell Node B surpasses first interference value, the home cell Node B sends solicited message to radio network controller, and radio network controller sends to the home cell Node B according to described request information with the neighbor cell user terminal information.
LMT Local Maintenance Terminal or control maintenance centre by the sub-district Node B replace radio network controller transmits static information from neighbor cell to this sub-district Node B.
In described step 2, the user terminal information of the sub-district that the home cell Node B is adjacent with this with the static information of the sub-district that is adjacent is stored in the core control board of home cell Node B.
In described step 2, described home cell Node B is directly passed to the physical layer of described home cell Node B with the neighbor cell static information that received and neighbor cell user terminal information by the core control board of described home cell Node B, stores above-mentioned information by this physical layer.
Whether many area interference appear in the physical layer monitoring home cell of described home cell Node B, if many area interference, then be stored in home cell information, neighbor cell static information and the neighbor cell user terminal information of this core control board, to carry out joint-detection to the core control board request of this home cell Node B.
Described neighbor cell user terminal information comprises: the resource that the user is assigned.
Beneficial effect of the present invention is, has solved the problem of sharing adjacent cell information in this sub-district, and does not change the structure of existing system, and cost is low, thereby can improve the performance that multi-plot joint detects.
Description of drawings
Fig. 1 is the inventive method schematic diagram;
Fig. 2 is the schematic diagram of another realization of the present invention.
Embodiment
Below, carry out following detailed description for the present invention in conjunction with the accompanying drawings.
As shown in Figure 1, be the inventive method schematic diagram.LMT Local Maintenance Terminal (LMT-R) by RNC or control maintenance centre (OMC) are provided with the neighbouring relations of sub-district, these relations mainly comprise the home cell of which Node B and sub-district adjacent with the home cell of Node B or the like, and store these information in RNC.And the static information (comprising the frequency of neighbor cell allocation etc.) of storage sub-district in the radio network controller (RNC), these static informations obtain from operation maintenance center (OMC) or RNC LMT Local Maintenance Terminal (LMT-R).Wherein, the static information of sub-district comprises: the information that does not often change is such as but not limited to following several: the scrambler of neighbor cell, intermediate sequence sign indicating number, sub-district ID or the like.
In running order as the Node of home cell B, the LMT Local Maintenance Terminal of Node B (LMT-B) or OMC will set which sub-district and home cell forms neighbor cell.Node B can obtain the static information of all neighbor cells by LMT-B or OMC, comprises for example information such as training sequence code, scrambler; Node B can obtain this neighbor cell static information from RNC by Iub interface (RNC and Node B between network interface) equally, and this neighbor cell static information all is stored in the core control board (CCB) of NodeB.These information can dispose by LMT-B (Node B LMT Local Maintenance Terminal) or OMC (operation maintenance center), also can use the signaling (such as CELL SETUP REQUEST) of RNC to pass to Node B.
RNC will the user terminal information in neighbor cell sends to the Node B of home cell, for example the assigned resource information of user terminal is (such as which Resource Unit of which CU, spreading code, time slot distributes, be used for the information of joint-detection with skew of training sequence code etc.), RNC can send to the information of home cell user terminal the adjacent Node B that needs these information simultaneously, so just make storage home cell information among all sub-district Node B, active user terminals information in sub-district static information that is adjacent and the neighbor cell, this active user comprises to be called out, and sets up the user of data communication.
When Node B receives the neighbor cell user terminal information, behind the sub-district static information that is adjacent in addition, with this information stores in core control board (CCB:Core Control Board), CCB is the core control board of Node B, its main effect comprises control and manages whole Node B, administer and maintain interface (ATM and Iub etc.) with RNC, and administer and maintain functions such as interface with OMC and LMT-B, consider actual conditions, may in system, finish above task, be not limited to so the neighbor cell static information by other unit, the information stores of user terminal is on other unit in the neighbor cell.And can send the information that these information and home cell information are used for joint-detection to physical layer by following two modes: one of them is, after CCB receives the neighbor cell static information and neighbor cell user terminal information that Node B sends, directly send relevant physical layer to, physical layer is stored these information, and in needs, use these information to carry out joint-detection, in this mode, physical layer needs bigger buffer memory to be used to receive the static information and the neighbor cell user terminal information of the neighbor cell that transmits at any time; Another kind of mode is, whether the user terminal that physical layer is monitored in the home cell in real time interference phenomenon occurs, if interference phenomenon then send to require the neighbor cell user terminal information that obtains the neighbor cell static information and cause interference etc. to be used for the request of joint-detection to CCB, make response by CCB, the information that sends its requirement to physical layer is to carry out joint-detection.
As shown in Figure 2, be the schematic diagram of another realization of the present invention.Between RNC and Node B, increase privately owned signaling, the performing step of this mode is, RNC storage community user terminal information, the static information of storage neighbor cell in the core control board of Node B, (length of Midamble sign indicating number window need be fixed and the static information that only needs neighbor cell just can carry out the Interference Detection of neighbor cell user terminal, such as being 16), detect the strong jamming of neighbor cell when the physical layer of Node B, Node B can send solicited message to RNC, and RNC will ask user terminal information to turn back to Node B.
As another kind of feasible pattern, because more than one of adjacent sub-district, have a plurality of sub-districts around the sub-district, user terminal in home cell has taken place to move, switch, leave or enter a situation such as sub-district, suppose to have three neighbor cells, user terminal 1 need be from the sub-district 1 switches to sub-district 2, and for using the joint inspection of many sub-districts in sub-district 3, then sub-district 3 also needs to know these information, above situation all will trigger the Node B that RNC sends to the information of this user terminal 1 neighbor cell 3, perhaps simultaneously this sub-district, user terminal 1 place static information is sent to the Node B of neighbor cell 3, so just make to store among the NodeB to be adjacent and useful user terminal information and adjacent cell information, reduced offered load like this.
No matter which kind of implementation whether share the information of neighbor cell and can pass through OMC, and LMT-T and LMT-B control RNC and whether Node B adopts the inventive method (by the O﹠amp of attended operation system; The M parameter is regulated), can realize interconnecting with the existing equipment of other producers by this mechanism.
Beneficial effect of the present invention is, has solved this sub-district and has shared the problem of neighbor cell relevant information, and do not changed the structure of existing system, and cost is low, can improve the performance of joint-detection.
Above embodiment only is used to illustrate the present invention, but not is used to limit the present invention.
Claims (6)
1. method of sharing adjacent cell information in multi-plot joint detects is characterized in that:
Step 1, the static information of storage sub-district and the community user end message that is used for joint-detection in radio network controller; Described sub-district static information comprises: training sequence code, scrambler and sub-district ID;
Step 2, to the static information of at least one neighbor cell of each Node B transmission home cell and the user terminal information of neighbor cell, the trigger condition of described transmission is by radio network controller:
Send the static information of the neighbor cell of home cell to the sub-district Node B by radio network controller, when the interference that detects the neighbor cell user terminal according to the static information of neighbor cell when the physical layer of home cell Node B surpasses first interference value, the home cell Node B sends solicited message to radio network controller, and radio network controller sends to the home cell Node B according to described request information with the neighbor cell user terminal information.
2. a kind of method of in multi-plot joint detects, sharing adjacent cell information according to claim 1, it is characterized in that, replace radio network controller transmits static information from neighbor cell to this sub-district Node B by the LMT Local Maintenance Terminal of sub-district Node B or control maintenance centre.
3. a kind of method of in multi-plot joint detects, sharing adjacent cell information according to claim 1, it is characterized in that in described step 2 user terminal information of the sub-district that the home cell Node B is adjacent with this with the static information of the sub-district that is adjacent is stored in the core control board of home cell Node B.
4. a kind of method of in multi-plot joint detects, sharing adjacent cell information according to claim 1, it is characterized in that in described step 2, described home cell Node B is directly passed to the physical layer of described home cell Node B with the neighbor cell static information that received and neighbor cell user terminal information by the core control board of described home cell Node B, stores above-mentioned information by this physical layer.
5. a kind of method of in multi-plot joint detects, sharing adjacent cell information according to claim 1, it is characterized in that, whether many area interference appear in the physical layer monitoring home cell of described home cell Node B, if many area interference, then be stored in home cell information, neighbor cell static information and the neighbor cell user terminal information of this core control board, to carry out joint-detection to the core control board request of this home cell Node B.
6. a kind of method of sharing adjacent cell information in multi-plot joint detects according to claim 1 is characterized in that described neighbor cell user terminal information comprises: the resource that the user is assigned.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2009079832A1 (en) * | 2007-12-18 | 2009-07-02 | Zte Corporation | Method of uplink multi-cell joint detection in a time division -synchronous code division multiple access system |
| CN101741412B (en) * | 2008-11-19 | 2013-06-05 | 中兴通讯股份有限公司 | Construction method of spreading codes and multi-community joint detection method |
| CN101990233B (en) * | 2009-07-30 | 2013-06-05 | 中兴通讯股份有限公司 | Method, device and system of joint detection and resetting in time division-synchronization code division (TD-SCDMA) system |
| CN102281523A (en) * | 2010-06-13 | 2011-12-14 | 中兴通讯股份有限公司 | Radio network controller and neighbouring cell information updating method thereof |
| US9521044B2 (en) * | 2013-03-08 | 2016-12-13 | Qualcomm Incorporated | Systems and methods for discovering devices in a neighborhood aware network |
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| CN1434595A (en) * | 2002-01-24 | 2003-08-06 | 华为技术有限公司 | Method for automatic maintenance neighborlist in CDMA system |
| WO2005114859A1 (en) * | 2004-05-20 | 2005-12-01 | Ipwireless, Inc | Multi-user detector and method for use in a communication system |
| CN1870452A (en) * | 2005-05-26 | 2006-11-29 | 上海原动力通信科技有限公司 | Method for adjacent cell joint detection in time-dvision duplex CDMA system |
| CN1929323A (en) * | 2005-09-07 | 2007-03-14 | 大唐移动通信设备有限公司 | Method of suppressing cross time slot interfere for time slot CDMA system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1434595A (en) * | 2002-01-24 | 2003-08-06 | 华为技术有限公司 | Method for automatic maintenance neighborlist in CDMA system |
| WO2005114859A1 (en) * | 2004-05-20 | 2005-12-01 | Ipwireless, Inc | Multi-user detector and method for use in a communication system |
| CN1870452A (en) * | 2005-05-26 | 2006-11-29 | 上海原动力通信科技有限公司 | Method for adjacent cell joint detection in time-dvision duplex CDMA system |
| CN1929323A (en) * | 2005-09-07 | 2007-03-14 | 大唐移动通信设备有限公司 | Method of suppressing cross time slot interfere for time slot CDMA system |
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