CN102075945A - Method for distributing distributed physical cell identity in LTE wireless access network - Google Patents
Method for distributing distributed physical cell identity in LTE wireless access network Download PDFInfo
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Abstract
The invention discloses a method for distributing a distributed physical cell identity in a long term evolution (LTE) wireless access network, which comprises the steps of: step A, Operation administration maintenance (OAM) configures a physical cell identity (PCI) list for an evolved node B (ENB) which is newly added into the network; step B, the ENB which is newly added into the network acquires PCI information used by all neighboring cells of the ENB; and step C, the ENB which is newly added into the network deletes PCIs used by all neighboring cells from the PCI list, judges whether PCI values are still remained in the PCI list, if so, randomly selects one PCI value as the PCI of a target cell that the ENB belongs to, and otherwise, reports the abnormality to the OAM. The method for distributing the distributed physical cell identity in the LTE wireless access network promptly distributes the PCI for the target cell of the ENB which is newly added into the network in a way of negotiating with ENBs existing in the network, meets a principle of PCI distribution, takes the synchronization of PCI information among cells into full consideration, reduces the times of cell reselection and improves service quality of the network.
Description
Technical field
The present invention relates to wireless communication technology field, the distribution method of distributed Physical Cell Identifier in particularly a kind of LTE wireless access network.
Background technology
Along with the continuous development of the network technology and the communication technology, mobile communications network by present 3G network gradually to 4G evolution, the LTE network is the technology that is in the middle of the process of this Long Term Evolution.LTE (Long Term Evolution, Long Term Evolution) network is with its high data rate, the low delay, grouping feature such as transmission and receiving much concern, it mainly is made of evolved node B (eNodeB or ENB) and IAD (AGW), compare with traditional 3G network, ENB has replaced original NodeB, network elements such as RNC, adopt the grid mode to interconnect by X2 interface between the ENB, therefore the LTE network presents the flattening structure, covering under the situation of the same area so, required ENB quantity is more much more than legacy network, deployment along with LTE, it is more and more that the quantity of network parameter and structure can become, become increasingly complex, the difficulty of corresponding network operation and deployment is also increasing.If LTE still adopts traditional O﹠M pattern, LTE operator certainly will pay more operation cost (OPEX) so.
Physical Cell Identifier (PCI) is to be used for the physical layer identifications of a sub-district of unique identification in the LTE network, and it can be used for producing synchronizing signal, and user terminal (UE) can be determined the sub-district at its place by synchronizing signal.But available PCI has only 504 in network, so the PCI in the network must reuse.Traditional PCI method of salary distribution is the PCI use information that the planning tool of employing off-line is obtained the whole network, and (neighbor cell PCI must be different for the principle of distributing according to PCI then; The PCI of two sub-districts adjacent with same sub-district also must be different), be purpose cell allocation PCI, then the value after distributing is sent to operation support system (OSS), distribute to corresponding district by OSS again.This centralized fashion needs too many manual intervention, produces PCI as the startup instrument and sends OSS later on to, distributes PCI to give new sub-district or the like.This mode obviously is not suitable for the ENB in future and the LTE network that number of cells is on the increase.
Summary of the invention
(1) technical problem that will solve
The technical problem to be solved in the present invention is: how the distribution method of distributed Physical Cell Identifier in a kind of LTE wireless access network is provided, can improves the service quality of network in time for increasing the number of times that cell allocation PCI also can reduce the sub-district gravity treatment newly.
(2) technical scheme
For solving the problems of the technologies described above, the invention provides the distribution method of distributed Physical Cell Identifier in a kind of LTE wireless access network, this method comprises:
Steps A, OAM are the new ENB PCI allocation tabulation that adds network;
The ENB of step B, described new adding network obtains the PCI information that its all neighbor cells use;
The ENB of step C, described new adding network removes the PCI that its all neighbor cells use from the PCI tabulation, and judges in the described PCI tabulation whether also have the PCI value, if having, then PCI value of picked at random is as the PCI of Target cell under it; Otherwise, unusual to the OAM report.
Preferably, described step B specifically comprises:
The ENB of step B1, described new adding network sends X2 to its all neighbor cells and sets up the PCI information that request message requests is obtained described neighbor cell use;
Each neighbor cell of the ENB of step B2, described new adding network is ranked to the ENB that transmission X2 sets up the new adding network of request message;
Each neighbor cell of the ENB of step B3, described new adding network first ENB in formation returns the PCI information that described neighbor cell uses, and other ENB return and set up request failure message in formation;
Each neighbor cell of the ENB of step B4, described new adding network removes described first ENB from formation, and judges whether formation is empty, if be not empty, then return step B3, and no longer other ENB return and set up request failure message in formation, otherwise, process ends.
Preferably, described step B2 specifically comprises:
Each neighbor cell of the ENB of step B2, described new adding network is set up the time of advent of request message, is newly added the priority of ENB of network or the combination of the two ENB that sends X2 and set up the new adding network of request message is ranked according to X2.
Preferably, described resume request failure message is carried the reason of failure.
Preferably, step B specifically comprises: the ENB of described new adding network obtains the PCI information that its all neighbor cells use by the mode of following line receiver monitoring wireless electric wave.
Preferably, step B specifically comprises: the ENB of described new adding network obtains the PCI information that its all neighbor cells use by the mode of listen for user device report.
Preferably, after the PCI of PCI value as Target cell under it of picked at random, this distribution method also comprises:
The ENB of described new adding network upgrades neighbor information, and the PCI value reporting that it is selected is given OAM and reported that to its all neighbor cells it upgrades the message of neighbor information.
Preferably, report its message of upgrading neighbor information to its all neighbor cells after, this distribution method also comprises:
Each neighbor cell of the ENB of described new adding network is informed OAM with this message simultaneously from upgrading the neighbor information of this neighbor cell after the ENB of described new adding network listens to the neighbor information updating message.
(3) beneficial effect
The present invention proposes the distribution method of distributed Physical Cell Identifier in a kind of LTE wireless access network, by in time being the purpose cell allocation PCI of newly-increased ENB in the network with the mode that exists ENB to consult mutually, (neighbor cell PCI must be different to have satisfied the principle that PCI distributes, the PCI of two sub-districts adjacent with same sub-district also must be different) and fully take into account the synchronous of minizone PCI information, thereby can reduce the number of times of sub-district gravity treatment, improve the service quality of network; The strategy of consulting can be decided according to actual conditions, has strengthened the flexibility of system; Reduced manual intervention to greatest extent, provide practicable PCI allocative decision for extensive ENB disposes.
Description of drawings
Fig. 1 is the distribution method flow chart of distributed Physical Cell Identifier in the LTE wireless access network of the embodiment of the invention;
Fig. 2 is the method flow diagram that ENB described in the method for the invention obtains the PCI information of its all neighbor cells uses;
Fig. 3 is the schematic diagram that the method for the invention is applied in an embodiment in the virtual dense network.
Embodiment
Below in conjunction with drawings and Examples, the specific embodiment of the present invention is described in further detail.Following examples are used to illustrate the present invention, but are not used for limiting the scope of the invention.
Fig. 1 is the distribution method flow chart of distributed Physical Cell Identifier in the LTE wireless access network of the embodiment of the invention; As described in Figure 1, described method comprises:
Steps A, OAM are the new ENB PCI allocation tabulation that adds network;
In the network that has ENB, the new ENB that adds network detects OAM (the Operation Administration Maintenance under it, operation management maintain) after, himself information such as type, sign and other related data are sent to OAM, after passing through safety verification, OAM sends to the PCI tabulation ENB of this new adding network.Described already present ENB is for finishing the ENB of affiliated subdistrict PCI configuration; Described PCI tabulation is the optional PCI scope of ENB of this new adding network, for example 1～50.
The ENB of step B, described new adding network obtains the PCI information that its all neighbor cells use;
Fig. 2 is the method flow diagram that ENB described in the method for the invention obtains the PCI information of its all neighbor cells uses; As described in Figure 2, described distribution method comprises:
The ENB of step B1, described new adding network sends X2 to its all neighbor cells and sets up the PCI information that request message requests is obtained described neighbor cell use;
In this step, the ENB of described new adding network can simultaneously or send X2 to its all neighbor cells successively and set up the PCI information that request message requests is obtained described neighbor cell use.
Each neighbor cell of the ENB of step B2, described new adding network is ranked to the ENB that transmission X2 sets up the new adding network of request message;
In this step, can set up the time of advent of request message, newly add the priority of ENB or the combination of the two or the queuing of other factor of influence of network according to X2.
Each neighbor cell of the ENB of step B3, described new adding network first ENB in formation returns the PCI information that described neighbor cell uses, and other ENB return and set up request failure message in formation;
The described reason that can carry failure in the request failure message of setting up for example needs to wait for a Preset Time.
Each neighbor cell of the ENB of step B4, described new adding network removes described first ENB from formation, and judges whether formation is empty, if be not empty, then return step B3, and no longer other ENB return and set up request failure message in formation, otherwise, process ends.
In this step, the ENB of described new adding network can also adopt by the mode of following line receiver monitoring wireless electric wave and obtain the PCI information that its all neighbor cells use, or adopts the mode of listen for user equipment (UE) report to obtain the PCI information that its all neighbor cells use.
The ENB of step C, described new adding network removes the PCI that its all neighbor cells use from the PCI tabulation, and judges in the described PCI tabulation whether also have the PCI value, if having, then PCI value of picked at random is as the PCI of Target cell under it; Otherwise, unusual to the OAM report;
After the PCI of PCI value of picked at random as Target cell under it, can also comprise: the ENB of described new adding network upgrades neighbor information, and the PCI value reporting that it is selected is given OAM and reported that to its all neighbor cells it upgrades the message of neighbor information.
Each neighbor cell of the ENB of described new adding network is the neighbor information of renewable this neighbor cell after listening to the neighbor information updating message from the ENB of described new adding network.Also this message to be informed OAM simultaneously.
Fig. 3 is the schematic diagram that the method for the invention is applied in an embodiment in the virtual dense network; As described in Figure 3, suppose in the existing network that ENB all is that design is good and dispose good.Initiate ENB has finished basic configuration and has set up with the X2 of its neighbours ENB and has been connected.The initialization of X2 interface between ENB.In addition, for the purpose of simplifying the description, with arrival time of message as queuing policy.If having the ENB of less ID, the identical selection of arrival time comes the front.The PCI tabulation of each sub-district is made as 1 to 50.As shown in Figure 2, its ID of ENB from 1 to 23 that has three sub-districts is deployed in consolidated network, and wherein the cell information of already present ENB is as shown in table 1.
Already present ENB information in table 1. network
Wherein, ENB_ID represents the unique identification of ENB.Cell_ID represents the unique identification (not repeating) of sub-district, and PCI is the Physical Cell Identifier of sub-district, might be reused in network.In addition, Neighbor_Cell_ID is used for representing the set of neighbor cell sign.The ENB_ID of neighbor cell promptly is the ID of the ENB under this sub-district.For example, the ENB_ID of an ENB is 6, it has three sub-districts, sub-district ID is respectively 1,2,3, their PCI also is respectively 1,2,3, Cell_ID is 1 sub-district with belonging to ENB_ID is that the PCI of 11 ENB is that 5 sub-district is adjacent, and the Cell_ID of this sub-district can find from table 2, and value is 15.Neighbor_Cell_ID promptly is 15 so.Sometimes an ENB has a plurality of neighbours ENB, and a sub-district has a plurality of neighbor cells, ENB19 as shown in Figure 3.
The described method of the application of the invention is that ENB_ID is that the result of cell allocation sub-district PCI of 1,2,15,16 and 10 ENB is as shown in table 2, wherein, ENB_ID is respectively that 1,2,15,16 ENB all is that ENB_ID is the neighbours of 14 ENB, and ENB_ID is that 10 neighbours all are the ENB that existed.
The allocation result of table 2. sub-district PCI
As can be seen from Table 2, the distribution method of distributed Physical Cell Identifier in a kind of LTE wireless access network that the present invention proposes, by in time being the purpose cell allocation PCI of newly-increased ENB in the network with the mode that exists ENB to consult mutually, (neighbor cell PCI must be different to have satisfied the principle that PCI distributes, the PCI of two sub-districts adjacent with same sub-district also must be different) and fully take into account the synchronous of minizone PCI information, thereby can reduce the number of times of sub-district gravity treatment, improve the service quality of network; The strategy of consulting can be decided according to actual conditions, has strengthened the flexibility of system; Reduced manual intervention to greatest extent, provide practicable PCI allocative decision for extensive ENB disposes.
Above execution mode only is used to illustrate the present invention; and be not limitation of the present invention; the those of ordinary skill in relevant technologies field; under the situation that does not break away from the spirit and scope of the present invention; can also make various variations and modification; therefore all technical schemes that are equal to also belong to category of the present invention, and scope of patent protection of the present invention should be defined by the claims.
Claims (8)
1. the distribution method of distributed Physical Cell Identifier in the LTE wireless access network is characterized in that this method comprises:
Steps A, OAM are the new ENB PCI allocation tabulation that adds network;
The ENB of step B, described new adding network obtains the PCI information that its all neighbor cells use;
The ENB of step C, described new adding network removes the PCI that its all neighbor cells use from the PCI tabulation, and judges in the described PCI tabulation whether also have the PCI value, if having, then PCI value of picked at random is as the PCI of Target cell under it; Otherwise, unusual to the OAM report.
2. distribution method according to claim 1 is characterized in that, described step B specifically comprises:
The ENB of step B 1, described new adding network sends X2 to its all neighbor cells and sets up the PCI information that request message requests is obtained described neighbor cell use;
Each neighbor cell of the ENB of step B2, described new adding network is ranked to the ENB that transmission X2 sets up the new adding network of request message;
Each neighbor cell of the ENB of step B3, described new adding network first ENB in formation returns the PCI information that described neighbor cell uses, and other ENB return and set up request failure message in formation;
Each neighbor cell of the ENB of step B4, described new adding network removes described first ENB from formation, and judges whether formation is empty, if be not empty, then return step B3, and no longer other ENB return and set up request failure message in formation, otherwise, process ends.
3. distribution method according to claim 2 is characterized in that, described step B2 specifically comprises:
Each neighbor cell of the ENB of step B2, described new adding network is set up the time of advent of request message, is newly added the priority of ENB of network or the combination of the two ENB that sends X2 and set up the new adding network of request message is ranked according to X2.
4. distribution method according to claim 2 is characterized in that described resume request failure message is carried the reason of failure.
5. distribution method according to claim 1 is characterized in that step B specifically comprises: the ENB of described new adding network obtains the PCI information that its all neighbor cells use by the mode of following line receiver monitoring wireless electric wave.
6. distribution method according to claim 1 is characterized in that step B specifically comprises: the ENB of described new adding network obtains the PCI information that its all neighbor cells use by the mode of listen for user device report.
7. according to each described distribution method among the claim 1-6, it is characterized in that after the PCI of PCI value as Target cell under it of picked at random, this distribution method also comprises:
The ENB of described new adding network upgrades neighbor information, and the PCI value reporting that it is selected is given OAM and reported that to its all neighbor cells it upgrades the message of neighbor information.
8. distribution method according to claim 7 is characterized in that, report its message of upgrading neighbor information to its all neighbor cells after, this distribution method also comprises:
Each neighbor cell of the ENB of described new adding network is informed OAM with this message simultaneously from upgrading the neighbor information of this neighbor cell after the ENB of described new adding network listens to the neighbor information updating message.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102595416A (en) * | 2012-02-16 | 2012-07-18 | 北京邮电大学 | PCI (Physical Cell Identity) self-adaptive distribution method in cellular communication system |
| CN102740300A (en) * | 2012-06-29 | 2012-10-17 | 中兴通讯股份有限公司 | Automatic distribution method and device of physical-layer cell identities (PCIs) |
| CN102781008A (en) * | 2012-07-10 | 2012-11-14 | 电信科学技术研究院 | Method and device for carrying out PCI (physical cell identity) selection |
| CN103947236A (en) * | 2011-11-25 | 2014-07-23 | 日本电气株式会社 | Cell identifier allocation method, base station, maintenance server, and mobile communication system |
| CN105992257A (en) * | 2015-01-28 | 2016-10-05 | 中兴通讯股份有限公司 | Public safety communication realization method and device |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6178327B1 (en) * | 1998-05-08 | 2001-01-23 | Motorola, Inc. | Method and apparatus for providing fault tolerance in frequency reuse wireless communication systems |
| CN101600011A (en) * | 2008-06-03 | 2009-12-09 | 中兴通讯股份有限公司 | The concurrent playing method and device of mobile multimedia terminal |
| CN101742484A (en) * | 2008-11-07 | 2010-06-16 | 中兴通讯股份有限公司 | Method for allocating physical cell identity (PCI) and base station |
-
2010
- 2010-12-22 CN CN 201010618342 patent/CN102075945B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6178327B1 (en) * | 1998-05-08 | 2001-01-23 | Motorola, Inc. | Method and apparatus for providing fault tolerance in frequency reuse wireless communication systems |
| CN101600011A (en) * | 2008-06-03 | 2009-12-09 | 中兴通讯股份有限公司 | The concurrent playing method and device of mobile multimedia terminal |
| CN101742484A (en) * | 2008-11-07 | 2010-06-16 | 中兴通讯股份有限公司 | Method for allocating physical cell identity (PCI) and base station |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103947236A (en) * | 2011-11-25 | 2014-07-23 | 日本电气株式会社 | Cell identifier allocation method, base station, maintenance server, and mobile communication system |
| CN102595416A (en) * | 2012-02-16 | 2012-07-18 | 北京邮电大学 | PCI (Physical Cell Identity) self-adaptive distribution method in cellular communication system |
| CN102595416B (en) * | 2012-02-16 | 2015-04-08 | 北京邮电大学 | PCI (Physical Cell Identity) self-adaptive distribution method in cellular communication system |
| CN102740300A (en) * | 2012-06-29 | 2012-10-17 | 中兴通讯股份有限公司 | Automatic distribution method and device of physical-layer cell identities (PCIs) |
| CN102740300B (en) * | 2012-06-29 | 2019-02-26 | 中兴通讯股份有限公司 | The auto-allocation method and device of physical-layer cell identifier |
| CN102781008A (en) * | 2012-07-10 | 2012-11-14 | 电信科学技术研究院 | Method and device for carrying out PCI (physical cell identity) selection |
| CN102781008B (en) * | 2012-07-10 | 2016-04-13 | 电信科学技术研究院 | A kind of method and device carrying out PCI selection |
| CN105992257A (en) * | 2015-01-28 | 2016-10-05 | 中兴通讯股份有限公司 | Public safety communication realization method and device |
| CN105992257B (en) * | 2015-01-28 | 2021-01-22 | 中兴通讯股份有限公司 | Public safety communication implementation method and device |
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