CN100508638C

CN100508638C - Method and device for expanding residence covering range based on established distance identify value

Info

Publication number: CN100508638C
Application number: CNB2006100729106A
Authority: CN
Inventors: 付红军
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2006-04-03
Filing date: 2006-04-03
Publication date: 2009-07-01
Anticipated expiration: 2026-04-03
Also published as: CN1984426A

Abstract

The NodeB executes the following steps for the users in coverage area within the distance marked by nTPmax-(n+1)TPmax in the radius of cell: the difference between the distance of user and NodeB and the distance marked by nTPmax is converted into TP information that is reported to RNC; according to the TP information sent down by RNC, getting the sum of the distance marked by TP information and the distance marked by nTPmax as the distance between user and NobeB; wherein, TP represents the distance mark value, TPmax represents the maximal distance mark value defined by system, and n is integer. The invention also reveals an apparatus for expanding the cell coverage range.

Description

Cell coverage area extended method and device thereof based on established distance identify value

Technical field

The present invention relates to Wideband Code Division Multiple Access (WCDMA) WCDMA technical field, especially relate to a kind of cell coverage area extended method and device thereof based on established distance identify value.

Background technology

At present at Wideband Code Division Multiple Access (WCDMA) (WCDMA, Wideband Code Division Multiple Access) in the system, each NodeB is the Physical Random Access Channel (PRACH of meeting in the sub-district generally, Physical Random Access Channel) access information of last search subscriber, and according to the distance between user accessing information calculating user who searches and the NodeB; NodeB is converted into T with user and the distance between the NodeB that calculates based on following expression formula then _PForm:

T _PBetween=user and the NodeB apart from ÷ T _PUnit (formula 1);

NodeB is based on according to the T after above-mentioned formula 1 conversion process _PCome the distance between identifying user and the NodeB, and report radio network controller (RNC, Radio Network Controller).

Follow-up RNC sets up in the process in dedicated channel, again with T _PInformation is handed down to NodeB, the T that NodeB issues according to RNC _PInformation calculates actual range between user and the NodeB based on above-mentioned formula 1, and near the actual range that calculates the dedicated channel information of search subscriber, based on the user's dedicated channel information that searches user's subsequent communications business datum is carried out demodulation process then.

But at present can regulation T in the WCDMA system _PConcrete span, as T _PGeneral span is 0～255, uses 8 bits to represent, unit length is 3chip, and the wireless transmission distance of 1chip correspondence is 78.125 meters; Just need to consider the concrete coverage of each NodeB like this at the networking initial stage, promptly the coverage of a NodeB generally should not surpass T _PThe actual range that can identify, when for example the coverage radius of NodeB surpassed 255 * 3 * 78.125 ≈ 60Km, Node just can't will exceed T _PUser in the distance range of sign and the actual range between the NodeB are based on T _POffer RNC in form, promptly NodeB can't be with radius of society greater than the user in the 60Km scope and the actual range between the NodeB based on T _POffer RNC in form, set up processing thereby can have influence on follow-up dedicated channel.

In sum, if in the WCDMA system, stipulated T in advance _PSpan, the follow-up actual coverage that just needs to guarantee each NodeB in the networking process can not exceed T _PTherefore the actual range that can identify will occur because T _PThe regulation value and the problem of restricted cell coverage.

Summary of the invention

The technical problem to be solved in the present invention is to propose a kind of cell coverage area extended method and device thereof based on established distance identify value, can be owing to the T that has stipulated with the actual coverage that can make each NodeB in mobile communication system _PSpan and being restricted.

For addressing the above problem, the technical scheme that the present invention proposes is as follows:

A kind of cell coverage area extended method based on established distance identify value comprises that NodeB is to being in radius of society at nT _Pmax～(n+1) T _PmaxThe user in the overlay area between the sign distance carry out following step process:

With distance and the nT of user apart from NodeB _PmaxThe difference conversion process of the distance that is identified becomes the TP message form to report radio network controller;

The follow-up T that issues according to radio network controller again _PInformation is asked for this T _PDistance that information identified and nT _PmaxIdentified apart from sum as the distance of user apart from NodeB;

Wherein, T _PThe expression distance identify value, T _PmaxBe the range marker maximum of system's regulation, n is an integer.

Preferably, search for the user accessing information that is in the described overlay area on the Physical Random Access Channel of NodeB in the sub-district; And according to the distance of the user accessing information calculating user who searches apart from NodeB.

Preferably, described T _PInformation and T _PThe transformational relation that information identifies between the distance is:

T _PDistance=T that information identifies _PInformation * T _PUnit.

Preferably, radio network controller the user is carried out dedicated channel when set up handling with T _PInformation is handed down to NodeB.

Preferably, described method also comprises step:

NodeB is in the dedicated channel information of the user who asks for apart near the search subscriber distance of NodeB;

And the user's communications business datum is carried out demodulation process according to the dedicated channel information that searches.

Preferably, the user that is respectively in the distinct coverage region that is in the same sub-district of described system distributes different sign indicating number resources.

Preferably, described system is a Wideband Code Division Multiple Access (WCDMA) communication system.

A kind of cell coverage area expanding unit based on established distance identify value comprises:

The distance conversion reports the unit, is used for radius of society at nT _Pmax～(n+1) T _PmaxThe user in the overlay area between the sign distance apart from distance and the nT of NodeB _PmaxThe difference conversion process of the distance that is identified becomes T _PMessage form reports radio network controller;

Distance is asked for the unit, is used for the follow-up T that issues according to radio network controller _PInformation is asked for this T _PDistance that information identified and nT _PmaxIdentified apart from sum as the distance of user apart from NodeB;

Preferably, described distance conversion reports the unit specifically to comprise:

The search subelement is used on the Physical Random Access Channel of sub-district search and is in radius of society at nT _Pmax～(n+1) T _PmaxThe user accessing information in the overlay area between the sign distance;

The distance calculation subelement, the user accessing information that is used for searching according to described search subelement calculates the distance of user apart from NodeB;

Distance conversion subelement is used for distance and nT that described distance calculation subunit computes is obtained _PmaxThe difference conversion process of the distance that is identified becomes T _PMessage form;

Report subelement, be used for the T after the described distance conversion subelement conversion process _PInformation reports radio network controller.

Preferably, described device also comprises:

Search unit is used for asking for according to described distance the result that asks for of unit, in the dedicated channel information of the user who asks for apart near the search subscriber distance of NodeB;

The demodulation process unit, the dedicated channel information that is used for searching according to described search unit is carried out demodulation process to the user's communications business datum.

T _PDistance=T that information identifies _PInformation * T _PUnit.

The beneficial effect that the present invention can reach is as follows:

Technical solution of the present invention is mainly by to being in radius of society at nT _Pmax～(n+1) T _PmaxThe user in the overlay area between the sign distance apart from distance and the nT of NodeB _PmaxThe difference conversion process of the distance that is identified becomes T _PMessage form reports RNC; The follow-up T that issues according to RNC again _PInformation is asked for this T _PDistance that information identified and nT _PmaxIdentified apart from sum as the distance (T of user apart from NodeB _PThe expression distance identify value, T _PmaxBe the range marker maximum of system's regulation, n is an integer), make and predesignated T in system _PUnder the situation of span, in follow-up networking process, also need not the coverage radius of cell of NodeB is limited only within T _PmaxIn the distance that can identify, but the coverage radius of cell of a NodeB reality can be expanded to 2T _Pmax, or even 3T _PmaxDeng the distance range that can identify, thereby realized in system based on the distance identify value T that predesignates _PThe also purpose that can expand cell coverage area.

Description of drawings

Fig. 1 is the main realization principle flow chart that the present invention is based on the cell coverage area extended method of established distance identify value;

Fig. 2 is for after using the inventive method principle, with the coverage extension of NodeB to 2T _PmaxThe cell coverage area schematic diagram of the radius distance that identifies;

Fig. 3 is for after using the inventive method principle, with the coverage extension of NodeB to 3T _PmaxThe cell coverage area schematic diagram of the radius distance that identifies;

Fig. 4 is the main composition structured flowchart that the present invention is based on the cell coverage area expanding unit of established distance identify value;

Fig. 5 reports the concrete composition structured flowchart of unit for the conversion of apparatus of the present invention middle distance;

Fig. 6 is that the concrete Application Example of apparatus of the present invention is formed structured flowchart.

Embodiment

The main design philosophy of technical solution of the present invention is on the basis of not revising the WCDMA basic agreement, manages by same microzonation is divided into different circumferential coverage, to surpass the T that system stipulates _PmaxIn the ultimate range coverage that can identify, NodeB equally can be with the user in those scopes and the distance between the NodeB based on T _PMessage form identifies and reports RNC, thereby avoid having influence on the user in those zones is carried out dedicated channel foundation processing.Even the WCDMA system has predesignated T like this _PSpan, in follow-up networking process, also can make the actual coverage of NodeB exceed T _PMaximum occurrences can identify apart from coverage, therefore can not be subjected to T _PThe restriction of span has promptly been predesignated T in the WCDMA system _PUnder the situation of span, can enlarge the actual coverage of each NodeB too.The technical solution of the present invention principle equally also goes for other associated communication systems except that the WCDMA system, and its implementation procedure implementation procedure that coexists in the WCDAM system is similar.

Technical solution of the present invention is applied in main realization principle in the WCDMA system, embodiment and the beneficial effect that should be able to reach is explained in detail below in conjunction with each accompanying drawing.

Please refer to Fig. 1, this figure is the main realization principle flow chart that the present invention is based on the cell coverage area extended method of established distance identify value, wherein in a sub-district, for radius of society respectively at nT _Pmax～(n+1) T _PmaxThe overlay area (being circumferential coverage substantially) between the sign distance, NodeB carries out following processing to the user in this zone apart from the distance of NodeB, wherein T _PDistance identify value in the expression WCDMA system, T _PmaxBe the range marker maximum of WCDMA system regulation, n be integer (0,1,2.....):

Step S10, NodeB is with distance and the nT of user apart from NodeB _PmaxThe difference conversion process of the distance that is identified becomes T _PMessage form reports radio network controller (RNC), its T _PInformation and T _PPass between the distance that information identified is: T _PDistance=T that information identifies _PInformation * T _PUnit;

NodeB obtains distance between user and the NodeB by following processing procedure:

NodeB at first searches for the user accessing information that is in this circumferential coverage on the Physical Random Access Channel PRACH in the sub-district;

Calculate the actual range of user according to the user accessing information that searches again apart from NodeB.

Step S20, the follow-up T that issues according to RNC again of NodeB _PInformation is asked for this and is issued T _PActual range that information identified and nT _PmaxThe actual range sum that is identified is as the distance of user apart from NodeB;

Wherein RNC the user is carried out dedicated channel when set up handling with corresponding T _PInformation is handed down to NodeB, and follow-up NodeB is in the dedicated channel information of the above-mentioned user who asks for apart near the search subscriber distance of NodeB, and according to the dedicated channel information that searches the user's communications business datum is carried out demodulation process.

Please refer to Fig. 2, this figure is after using the inventive method principle, with the coverage extension of NodeB to 2T _PmaxThe cell coverage area schematic diagram of the radius distance that identifies, wherein based on the invention described above method principle, the user that the WCDMA system can be respectively in the different circumferential coverage that are in the same sub-district distributes different sign indicating number resources, be that RNC can be with a plurality of circumferential coverage associating informations in the different radii scope, the user of all circumferential coverage is distributed unitedly a yard resource.Because under the prior art normal condition, when RNC carries out yard resource allocation to the user in the different districts, the sign indicating number resource can be multiplexing between the different districts, promptly the different user in two sub-districts can use identical code word, in order to match with existing protocol, the present invention program is when the user in the different circumferential coverage that marked off according to the radius of society value in to same sub-district of regulation RNC carries out yard resource allocation here, do not allow to occur codeword collisions yet, be that the code word that is assigned with also is inequality between the different user in any two circumferential coverage in the same sub-district.As above shown in Figure 2, RNC will be respectively the user who is in the user in the zone 1 and is in the zone 2 and distribute code source inequality.

Simultaneously, based on said method principle of the present invention, NodeB will handle all annular regions for downlink processing according to a sub-district, then handle respectively according to different zones for up processing; For example in above-mentioned Fig. 2, NodeB thinks that the descending user who is based upon in zone 1 and the zone 2 is same community user, and NodeB is carrying out common down channel when setting up, and two zoness of different are only set up a common signal channel; And up respectively will 2 user handles respectively the user of endocyclic area 1 with in the outer region, and the cell-level parameter in two circumferential coverage (as Tcell etc.) is identical.

To cover schematic diagram based on above-mentioned sub-district shown in Figure 2 below is example, specific implementation process to the inventive method is described in detail, the corresponding beneficial effect that can reach with the explanation that more helps the inventive method principle and more efficiently elaboration the inventive method:

When supposing that certain user initiates to insert, NodeB searches for the access information that obtains this user on the PRACH channel, and calculates the actual range of user distance NodeB based on the user accessing information that searches, if the distance that calculates is at T _PmaxWithin the radius distance 60Km coverage that can identify (promptly in circumferential coverage 1), then NodeB has the user to insert in the RNC reporting subdistrict, and the actual range conversion process of user distance NodeB is become T _PMessage form reports RNC; Follow-up RNC is carrying out dedicated channel when set up handling to this user, again with the T of correspondence _PInformation is handed down to NodeB, the T that NodeB issues at RNC _PNear the dedicated channel information that (in the circumferential coverage 1) searches for this user the actual range that information identified, and the follow-up business datum of this user is carried out demodulation process based on the dedicated channel information that searches.And if the distance that above-mentioned NodeB calculates is at T _PmaxOutside the radius distance 60Km coverage that can identify, and at 2T _PmaxWhen (promptly in circumferential coverage 2), then NodeB has the user to insert in the RNC reporting subdistrict within can the radius distance 120Km coverage of sign, and with actual range-T of user distance NodeB _PmaxThe difference conversion process of the actual range (being 60Km) that can identify becomes T _PMessage form reports RNC; Follow-up RNC is carrying out dedicated channel when set up handling to this user, again with the T of correspondence _PInformation is handed down to NodeB, the T that NodeB issues at RNC _PActual range+T that information identified _PmaxNear the dedicated channel information that (circumferential coverage 2 in) searches for this user can actual range (the being 60Km) end value of sign, and the follow-up business datum of this user is carried out demodulation process based on the dedicated channel information that searches.

As seen from the above-described embodiment, even the WCDMA system has predesignated T _PSpan (as 0～255), in follow-up networking process, also need not the coverage radius of cell of NodeB is limited only within the 60Km, but can be based on the inventive method principle, the coverage radius of cell of a NodeB reality is expanded to 2T _Pmax(120Km) or even 3T _Pmax(180Km) distance range that can identify, thus realized in the WCDMA system based on the range marker maximum of T of predesignating _PmaxThe also purpose that can expand cell coverage area.

Please refer to Fig. 3, this figure is after using the inventive method principle, with the coverage extension of NodeB to 3T _PmaxThe cell coverage area schematic diagram of the radius distance that identifies, its specific implementation process arrives 2T with above-mentioned coverage extension with NodeB _PmaxThe specific implementation situation of the cell coverage area of the radius distance that identifies no longer gives too much to give unnecessary details here.

Cell coverage area extended method corresponding to the above-mentioned proposition of the present invention based on established distance identify value, the present invention has also proposed a kind of cell coverage area expanding unit based on established distance identify value here, and this device can place the NodeB network entity of WCDMA system.Please refer to Fig. 4, this figure is the main composition structured flowchart that the present invention is based on the cell coverage area expanding unit of established distance identify value, it comprises that mainly the distance conversion reports unit 10 and distance to ask for unit 20, and wherein the main effect of these two component units is as follows:

The distance conversion reports unit 10, is mainly used in radius of society at nT _Pmax～(n+1) T _PmaxThe user in the overlay area (can think circumferential coverage basically) between the sign distance apart from distance and the nT of NodeB _PmaxThe difference conversion process of the distance that is identified becomes T _PMessage form reports radio network controller (RNC); T wherein _PBe the distance identify value in the WCDMA system, T _PmaxBe the range marker maximum of WCDMA system regulation, n is an integer;

Distance is asked for unit 20, is mainly used in the follow-up T that issues according to RNC _PInformation is asked for this and is issued T _PDistance that information identified and nT _PmaxIdentified apart from sum as the distance of user apart from NodeB;

Its middle distance conversion reports unit 10 and distance to ask for the 20 couples of T in unit _PInformation and T _PIt is as follows that information identifies the conversion relational expression of changing between the distance:

T _PDistance=T that information identifies _PInformation * T _PUnit.

As shown in Figure 5, this figure is the concrete composition structured flowchart that the conversion of apparatus of the present invention middle distance reports the unit, it reports unit 10 specifically to comprise search subelement 101, distance calculation subelement 102, distance conversion subelement 103 apart from conversion and reports subelement 104, and wherein the concrete effect of each component units is as follows:

Search subelement 101 is used on the Physical Random Access Channel PRACH of sub-district search and is in radius of society at nT _Pmax～(n+1) T _PmaxThe user accessing information in the circumferential coverage between the sign distance;

Distance calculation subelement 102 is used for calculating actual range between user and the NodeB according to the user accessing information that above-mentioned search subelement 101 is searched;

Distance conversion subelement 103 is used for actual distance value and nT that above-mentioned distance calculation subelement 102 is calculated _PmaxThe difference conversion process of the actual distance value that is identified becomes T _PMessage form, the conversion relational expression of its concrete foundation is as implied above;

Report subelement 104, be used for the T after above-mentioned distance conversion subelement 103 conversion process _PThe value of information reports RNC.

As shown in Figure 6, this figure is that the concrete Application Example of apparatus of the present invention is formed structured flowchart, and it is on the main composition architecture basics of above-mentioned Fig. 5, also and then comprise search unit 30 and demodulation process unit 40, wherein RNC is when carrying out dedicated channel foundation processing, with the T of correspondence to the user _PThe value of information is handed down to NodeB and carries out subsequent treatment, and then the concrete effect of these two newly-increased unit is as follows:

Search unit 30 is used for specifically asking for result, near the dedicated channel information of the search subscriber distance between user who asks for and the NodeB according to what above-mentioned distance was asked for unit 20;

Demodulation process unit 40, the dedicated channel information that is used for being searched according to above-mentioned search unit 30 is carried out correlation demodulation to the user's communications business datum and is handled.

The concrete technology realization of in apparatus of the present invention other details is asked corresponding specific descriptions with reference to the realization of the correlation technique in the said method of the present invention details in addition, no longer gives here too much to give unnecessary details.

Obviously, those skilled in the art can carry out various changes and modification to the present invention and not break away from the spirit and scope of the present invention.Like this, if of the present invention these are revised and modification belongs within the scope of claim of the present invention and equivalent technologies thereof, then the present invention also is intended to comprise these changes and modification interior.

Claims

1, a kind of cell coverage area extended method based on established distance identify value is characterized in that, NodeB is to being in radius of society at nT _Pmax～(n+1) T _PmaxThe user in the overlay area between the sign distance carry out following step process:

With distance and the nT of user apart from NodeB _PmaxThe difference conversion process of the distance that is identified becomes T _PMessage form reports radio network controller;

2, the method for claim 1 is characterized in that, search is in the user accessing information in the described overlay area on the Physical Random Access Channel of NodeB in the sub-district; And

Calculate the distance of user according to the user accessing information that searches apart from NodeB.

3, the method for claim 1 is characterized in that, described T _PInformation and T _PThe transformational relation that information identifies between the distance is:

T _PDistance=T that information identifies _PInformation * T _PUnit.

4, the method for claim 1 is characterized in that, radio network controller the user is carried out dedicated channel when set up handling with T _PInformation is handed down to NodeB.

5, method as claimed in claim 4 is characterized in that, also comprises step:

6, the method for claim 1 is characterized in that, the user that described system is respectively in the distinct coverage region that is in the same sub-district distributes different sign indicating number resources.

As claim 1 or 6 described methods, it is characterized in that 7, described system is a Wideband Code Division Multiple Access (WCDMA) communication system.

8, a kind of cell coverage area expanding unit based on established distance identify value is characterized in that, comprising:

9, device as claimed in claim 8 is characterized in that, described distance conversion reports the unit specifically to comprise:

10, device as claimed in claim 8 is characterized in that, also comprises:

11, install as claimed in claim 8 or 9, it is characterized in that described T _PInformation and T _PThe transformational relation that information identifies between the distance is:

T _PDistance=T that information identifies _PInformation * T _PUnit.

12, device as claimed in claim 8 is characterized in that, described system is a Wideband Code Division Multiple Access (WCDMA) communication system.