CN101637043A

CN101637043A - Determine to be suitable in the cellular communication system method and system of the Target cell set of switching from the cell-of-origin

Info

Publication number: CN101637043A
Application number: CN200780052269A
Authority: CN
Inventors: 亨里克·奥鲁佛松; 迈克尔·罗伯茨; 约翰·约翰松
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2007-03-20
Filing date: 2007-03-20
Publication date: 2010-01-27
Also published as: WO2008113211A1

Abstract

The present invention relates to the method in a kind of cellular communication system, described communication system comprises a plurality of sub-districts, each described sub-district comprises at least one transmitting set, be used to provide with cell coverage area in the communicating by letter of at least one subscriber equipment, wherein each described sub-district sends identification data, can derive the position of described sub-district in cell patterns according to this identification data, described cell patterns is described sub-district relative position each other.This method may further comprise the steps: send the expression of the subclass of described sub-district from the subscriber equipment of Serving cell transmitting set in described Serving cell overlay area, wherein have only the sub-district of described subclass to constitute the licensed cells of carrying out follow-up switching or sub-district gravity treatment to Target cell from described Serving cell.The invention still further relates to system, subscriber equipment, computer program and computer program.

Description

Determine to be suitable in the cellular communication system method and system of the Target cell set of switching from the cell-of-origin

Technical field

The present invention relates to be suitable in the definite cellular communication system according to claim 1 preamble the method for the Target cell set of switching from the cell-of-origin.The invention further relates to a kind of communication system according to the preamble of claim 27, according to a kind of subscriber equipment of claim 53, according to a kind of computer program of claim 55, and according to a kind of computer program of claim 56.

Background technology

Mobile radio system is normally cellular, total overlay area of this system is divided into less zone, wherein each zonule is associated with the wireless base station with one or more transmitting sets, and transmitting set is used for providing the communication resource by the wave point that communicates with subscriber equipment (UE).These zones are commonly referred to the sub-district, and UE can comprise for example mobile phone, the smart phone that is positioned at this zone or have laptop computer of communication capacity etc.Two or more sub-districts can sharing base, and for example, this base station can have the transmitting set to the different directions emission, and the overlay area of each transmitter is defined as a sub-district.Alternately, single subdistrict can comprise two or more transmitting sets that are used for providing in the specific region wireless coverage.In the cellular communications networks of simple form, the sub-district is adjacent one another are to provide covering jointly in the geographic area that communication system attempts to cover.

Network moves and supports mobility by allowing the interface (promptly with transmitting set be connected) between UE and the network, the moving through along with UE moves everywhere in network and UE is connected to different transmitting sets realizes of the interface between UE and the network.During when the UE start and with network service, it can be in state of activation or idle condition.When UE was in idle condition, the activity of UE dropped to minimum to reduce power consumption.Yet, when UE is mobile everywhere in network's coverage area, UE can be regularly and/or monitor its transmitting set that is connected at present continuously and/or in particular moment around transmitting set, thereby identification to be connected to (resident) around (adjacent or neighbours) suitable sub-district.Under idle pulley, this process is called the sub-district gravity treatment.Be more suitable for providing service if determine new sub-district than original resident sub-district, UE can gravity treatment arrive this new neighbor cell.

When being in enable mode following time, UE also measures proper cell regularly and/or continuously and/or in particular moment.Yet if UE moves to another sub-district from a sub-district under enable mode, simple sub-district gravity treatment is not enough, and this is because ongoing communication and communication channel need be reoriented to suitable sub-district (Target cell) from current area (Serving cell).The reorientation of this communication channel is called switching.Network uses the measurement report from UE to determine whether and will switch.

In order to reduce UE to the signaling amount of network transmission about the measurement report of peripheral cell, network sends neighbor cell lists (NBL) to UE.This NBL is special in the sub-district, and a purpose of this tabulation is the sub-district suitable Target cell on every side that definition sends this tabulation.Owing to wireless environment may occur down only measuring based on wireless quality seeming that most preferred sub-district is not suitable for situation about switching, so this tabulation is essential.

Neighbor cell lists can for example send by the Broadcast Control Channel (BCCH) that is designed to cover whole cell area.BCCH is not for having the common downlink channel of any up acknowledgement channel that is associated with it.This means and to carry out the robustness coding to data, therefore can consume quite a large amount of Radio Resources.

In fact, the transmission of neighbor list may consume too many available resources concerning a sub-district in some cases.Current third generation partner program (3GPP) just is being devoted to the following cellular communication system that defines, be called the general land wireless access (E-UTRA) of evolution or the example that Long Term Evolution (LTE) comes to this now, wherein in the sub-district, may only use very little bandwidth, for example a 1.25MHz.Except little bandwidth, the overlay area of these sub-districts is common also very little, has many sub-districts as the potential target sub-district around this causes.In this case, neighbor cell lists can be very big, and this has further increased the bandwidth that tabulation is used.

The 3GPP file R2-070493 of " neighbor cell lists simplification " discloses the solution of the problems referred to above, and it has described a kind of method, and wherein UE implicitly generates neighbor cell lists based on the information that each sub-district sends.In this solution, predefine and pre-configured a plurality of standard cellular configurations (pattern).In a kind of pattern, each sub-district be assigned with a specific identifier (the logic district value, LCV).Because neighbor cell uses specific pattern to number, so UE can read the logic district sign of Serving cell, and implicitly derives the numbering of distributing to each true neighbor cell.

Yet no matter idle pulley still is moving of enable mode, all must be in network and UE communication period identification sub-district.For example, under enable mode, the UE report is to the measurement result of neighbor cell, and wherein UE need inform to detect and measured which sub-district.Although since every kind of pattern only in the overlay network subclass of all sub-districts make LCV compress, but still need the signaling in the further minimizing of a kind of method system.

In addition, in practice, seldom comprise equal-sized sub-district in the design of sub-district with strict arranged in patterns.Therefore, also need to have the improved system of the improved ability of handling this situation.

Summary of the invention

The purpose of this invention is to provide a kind of in cellular communication system solution to the problems described above.This purpose is realized by the method according to the characteristic of claim 1.

Another object of the present invention provides the communication system that addresses the above problem.This purpose is realized by the communication system according to the characteristic of claim 27.

The present invention proposes the method in a kind of cellular communication system, described communication system comprises a plurality of sub-districts, each described sub-district comprises at least one transmitting set, be used to provide at least one UE to communicate by letter with in the cell coverage area, wherein each described sub-district sends identification data, can derive the position of described sub-district in cell patterns according to this identification data, described cell patterns is described sub-district relative position each other.This method may further comprise the steps: from the expression that the UE of Serving cell transmitting set in described Serving cell overlay area sends the subclass of described sub-district, wherein have only the sub-district of described subclass to constitute the licensed cells of carrying out follow-up switching or sub-district gravity treatment to Target cell from described Serving cell.

Advantage of the present invention is that even send neighbor cell lists by the sub-district in principle in communication system, but the part of cell patterns is represented these tabulations by reference, can significantly reduce the data volume of cell transmission in the system like this.It is bigger thereby that length tabulation is bigger is useful especially when regional that this method is applied in the number of neighbor cell, this is because needn't send the sign of all sub-districts in the tabulation, single common reference, for example the ultimate range of distance service sub-district just can comprise all sub-districts that will be considered licensed cells.

For making the features and advantages of the present invention clearer, be elaborated below in conjunction with preferred embodiments and drawings.These embodiment and accompanying drawing just are used for not being construed as limiting the invention for example.

Description of drawings

Fig. 1 illustrates the example that can advantageously use Long Term Evolution of the present invention (LTE) system.

Fig. 2 illustrates the example of the cell patterns according to the present invention.

Fig. 3 a illustrates another example of the cell patterns according to the present invention.

Fig. 3 b illustrates the example that sub-district according to the present invention renumbers.

Fig. 4 illustrates has set of cells shown in Fig. 3 a that the second layer according to the present invention renumbers.

Fig. 5 illustrates the schematic diagram of a plurality of sub-districts that are arranged in the overlay area that covers single subdistrict position in the cell patterns.

Fig. 6 illustrates the use of cell patterns on different frequency with the sub-district that varies in size.

Embodiment

In specification of the present invention and the claim, term " switch (handover) " not only comprises the switching under the enable mode, i.e. the switching of one or more communication channels also comprises the situation that the subscriber equipment (UE) that is under the idle pulley carries out the sub-district gravity treatment.In addition, term " Serving cell (serving cell) " not only comprises the UE sub-district of communication with it that is in enable mode, also comprise UE under idle condition resident sub-district.

Below with reference to the following cellular communication system that third generation partner program (3GPP) is devoted to define, be called the general land wireless access (E-UTRA) of evolution or Long Term Evolution (LTE) now and come that present invention is described.

Fig. 1 illustrates the example of E-UTRA system 100 frameworks.In this example, E-UTRA system 100 comprises two category nodes: wireless base station (fixed wireless transceiver), eNB (the Node B of enhancing) 101-103 and aGW (IAD) 104-105.Wherein, eNB 101-103 belongs to the UTRAN (E-UTRAN) 106 of evolution, and aGW belongs to the packet-based core networks (EPC) 107 of evolution.Subscriber equipment (UE) 108 is connected to network (E-UTRAN and EPC) by wave point Uu interface 109.ENB101-103 is in certain overlay area, promptly handles the communication on the wave point in the sub-district, the wireless signal of this overlay area have enough intensity with allow with this zone in UE carry out gratifying communication.

When UE 108 was mobile everywhere in the overlay area that communication system provides, UE 108 can move to another sub-district by a sub-district.Therefore, ongoing communication meeting is from the current affiliated eNB of UE, and promptly Serving cell is transferred to the sub-district that UE is entering, i.e. Target cell.This process by set up communication channel on the Uu of the Target cell interface and the Uu interface of the cell-of-origin that terminates on communication channel realize.

Target cell is based on selecting the measurement of potential Target cell that UE carries out, and wherein measurement result is sent to eNB for system handles.In neighbor cell lists, define the Target cell that is classified as " potential ", and this tabulation is sent to UE in the eNB scope by wireless channel.Neighbor cell lists as mentioned above, need to reduce the transmission of Information that is associated with the transmission of neighbor cell lists, thereby especially the very little number of cells that makes is very big in the sub-district, when for example can comprise maximum 96 neighbor cells.

In addition, under idle mode of operation, when moving in tracing area (TA) at least, when UE changed the sub-district, UE does not send any measurement report to eNB did not need explicit signaling transmission yet.Yet still the same with the enable mode neighbor cell lists that needs of idle pulley has bandwidth too and uses too much problem.

The invention provides a kind of permission be in activate and/or idle pulley under UE in determine that the method for neighbor cell lists information, this method do not need around each sub-district sends from system or the large list of neighbor cell.This system is not by sending neighbor cell lists, realizing that this cell-specific information comprises the data of the expression that therefrom can access the position of sub-district in cell patterns but send cell-specific information by the sub-district.Sub-district relative position each other in this cell patterns descriptive system, and this cell patterns also can be regarded the expression of the sub-district of geographic area as.In addition, according to the present invention, serving BS (eNB) (promptly provide the base station of one or more communication channels or idle UE the resident base station of arriving) sends information to UE, this information is about will considering which sub-district in the pattern when setting up suitable neighbor cell, and promptly which sub-district will be considered the information of licensed cells.Such information can for example comprise information (the cell patterns position of discerning licensed cells, here be meant logic district value LCV) or the sign (logic district value) of restricted cell, promptly except other all sub-districts (i.e. the sub-district that should not be considered) of licensed cells.Sending such information has the following advantages, it is the set that UE in the system can obtain suitable Target cell at an easy rate, wherein except information about restriction and/or licensed cells, these sub-districts only need send cell-specific data, and because pattern, these information can be retained as with the prior art cell list and compare much smaller data volume.Send such information and also have the following advantages, network can guarantee that UE only considers the sub-district that network sees fit.Therefore, the advantage that art methods sends the controlled neighbor cell lists comprise suitable cell also can realize by the present invention, and the present invention also has the advantage that reduces signaling, therefore also reduced the consumption of Radio Resource.

Fig. 2 is according to example cell pattern of the present invention.In the disclosed example, parameter " line displacement " and " maximum LCV " are used for defining cell patterns, this means that this cell patterns comprises the linear rows of 16 sub-districts, and new pattern is closelyed follow by the previous end of pattern on the x direction in the whole overlay area of cell patterns, promptly be numbered the sub-district that and then is numbered " 0 " behind the sub-district of " 15 ", create.In order to obtain two-dimensional pattern, row also puts together on the y direction, and wherein every row and previous row have 4.5 line displacement, promptly starts from the position of 4.5 sub-districts of skew on the x direction at the continuous row on the y direction.This can be by pattern numbering of sub-district 201 relatively, pattern is numbered perhaps as in specification of the present invention and the claim to be called the LCV " 5 " that logic district value LCV " 0 " and sub-district 202 have and (as shown in FIG., complete line not to be shown) as can be seen.Therefore, as shown in the figure, if the number of sub-district is very big in the system, then cell patterns can be repeatedly used, and is promptly multiplexing.Certainly, use can be replaced or merge to the pattern that comprises a large amount of sub-districts.

Each sub-district sends data, and UE can use these data to determine with respect to the Zhong Yuan of system (service) sub-district and/or other sub-districts the relative position of this sub-district and the sign of this sub-district.These data can for example comprise LCV, promptly represent the sub-district cell patterns the value of ad-hoc location.The current UE that resides in the adjacent cell can send LCV by common down channel or other channels that is fit to, as long as can decipher to the data that transmit on this channel.For example, can go up transmission LCV at BCH or any broadcast channel (for example SCH).

LCV in the set of LCV is assigned to the sub-district, and the set of this LCV is based on that the sub-district defines in the specific cell pattern with respect to the position of its peripheral cell.

In order to reduce the number of sub-district, for example the UE in sub-district 203 need consider the switching under free time and/or the enable mode, and network is informed the expression of the sets of permissions of sub-district for this purpose.For example, by the suitable signaling of 203 base stations, sub-district, network can tell have around the UE Serving cell what around " sub-district circle ", be called layer here, UE should be thought of as potential handoff candidate (neighbours) with these layers.In the example shown in Figure 2, two-layerly to be considered neighbours, i.e. licensed cells.Ground floor comprises immediate neighbor, i.e. the sub-district that directly borders on sub-district 203.The second layer comprises the immediate neighbor of ground floor sub-district.

Therefore, this is a kind of mode which LCV of network limits should be considered by UE.By informing the value of layer, network can be created the subclass of LCV by simple mode, i.e. licensed cells, thereby with create traditional neighbor cell lists and compare simpler and bandwidth is used more efficiently.Then, UE can carry out the sub-district that Cell searching detects to some extent to find, and at the sub-district that each detects, determines that whether its LCV belongs to permission LCV set, if belong to, joins the tabulation of the definite sub-district that is suitable for switching of UE with it.

If do not inform the number of plies that to consider, also can inform the layer that is not considered neighbor cell to UE.For example, the number of plies can be considered restricted cell more than or equal to 3.If do not inform layer value, also can inform distance value, this distance value is indicated to the maximal phase of the sub-district that should be considered and adjusts the distance.In this scheme, cell patterns can be used for determining the distance between current persistent district and the measured sub-district.Because pattern is schematically showing of sub-district physical location, therefore determined distance can be the distance in the pattern, and and need not be the actual range between real cell in the system.

So far, only unbroken layer is thought of as the sets of permissions that belongs to LCV.Yet under many situations, one or more sub-districts in the sets of permissions of sub-district are not suitable for, and therefore should get rid of from the sets of permissions of sub-district.A kind ofly realize that the mode of above-mentioned purpose is to inform the explicit LCV of one or more sub-districts that will get rid of.But, the bit that this signaling request is a large amount of, for example, if pattern is very big and comprise a lot of sub-districts, or as shown in Figure 2,, in sets of permissions, occur twice as

LCV

10,12 and 14 for a LCV that ambiguity is arranged, this just means that then these LCV must be distinguished if wherein have only needs to be excluded.

Among the present invention,, for example as shown in Figure 2, can provide second sign to reduce this signaling to the sub-district in the permission LCV set if defined permission LCV set.Make an explanation below in conjunction with Fig. 3 a-3b.Fig. 3 a illustrates another example of cell patterns, and wherein this cell patterns is provided by parameter " geometry " and " size ", and parameter value is: geometry: rhombus, size: 4 * 4, and promptly this cell patterns comprises 16 positions that are arranged to rhombus.

In this example, the sets of permissions of LCV is limited to immediate neighbor, i.e. the nearest layer of Serving cell 5.If want the sub-district in the limiting permission set, that is, any one in the restricted

cell

0,1,4,6,9 and 10 needs 4 bits to come distinguishing cell, that is, and and any one in the addressing sub-district 0 to 15.But, among the present invention, can reduce required bit number by in sets of permissions, the sub-district being renumberd.This is shown in Fig. 3 b, and wherein the required bit number of distinguishing cell is reduced to 3.As can be seen from the figure, sub-district in the sets of permissions comprises Serving cell, by from left to right, renumber from top to bottom.Like this, number 0 to 6 has only appearred, so only need three bits.Certainly, these results depend on the number of LCV in the pattern.If use to surpass 16 LCV in the pattern, then need to surpass 4 bits, then to use the potential income that renumbers will be bigger in the present invention.Described method requires the addressing among the definition permission LCV clearly, can by above-mentioned from left to right, from top to bottom method realizes.Another exemplary method is that (service) sub-district open numbering progressively expands to skin then from the center, if multilayer is arranged, need be in every layer predefined position open numbering.

In some cases, need to this permission LCV set, increase one or more additional LCV from permission LCV exterior of a set.The above-mentioned method that renumbers also is applicable to these situations.Can be numbered the LCV around the permission LCV set with predefined mode, thereby reduce the signaling that increases additional cell.This is shown in Figure 4, and Fig. 4 shows the set of the sub-district of Fig. 3 a, but has the second layer of the recompile according to the present invention.Note, in this concrete example, owing in the second layer, still need 4 bits to come distinguishing cell uniquely, so the actual gain of this compression is limited.As previously discussed, if the scope of LCV is more much bigger than permission LCV set, then this scheme can be more effective.

So far, the pattern that comprises basic equal cell size only has been discussed.But, because geography, user density or other factors may must arrange a plurality of less sub-districts to come the overlay area of single LCV in the overlay pattern.This situation has been shown among Fig. 5, for example, has wherein shown the

sub-district

4,5,9 and 10 of pattern shown in Fig. 3 a.But in this example, sub-district 9 is substituted by a plurality of less sub-district with sign 1 to 7.For simplicity, supposing that sub-district 5 is Serving cell and has only

sub-district

4,10 and represent a plurality of sub-districts of sub-district 9 to belong to sets of permissions, if these sub-districts can be distinguished from each other, then will be very favourable.For example, can realize by being increased in the LCV effectively additional addressing.For example, these sub-districts (1-7) can broadcast LCV value 9 and additional field, claims that below this additional field is an inner LCV addressed tags (ILAT), and this additional field is the sign of the sub-district in the LCV.

If the scope of ILAT is quite little, such as 0-7, promptly need three bits, identical ILAT bit length can be used to comprise all LCV of a plurality of sub-districts.But, if the scope of ILAT is quite big, and in whole system, can change, this will be of value to the signaling scope that changes ILAT.For example, a kind of may be Serving cell is informed scope from the value of ILAT to UE.Serving cell can be arranged to the ILAT scope of all adjacent LCV of broadcasting.Perhaps, Serving cell can be arranged to the ILAT scope of only broadcasting the LCV with the ILAT scope that is different from default value.

In as the solution among Fig. 5, this situation may appear, and wherein have only the part sub-district that constitutes LCV 9 to comprise and will be included in the sub-district sets of permissions of setting up suitable handoff candidate with ILAT 1-7.In this case, need the addressing set of cells,, thereby define the set of cells that the UE in should not being moved considers such as the part of sub-district 9:1-7 among Fig. 5.For example, can get rid of

sub-district

3,6 and 7.This eliminating often is called blacklist.If in LCV, carry out above-mentioned eliminating, as shown in the figure, can use ILAT.A kind of possible method is to list the LCV+ILAT of each sub-district that will be put on the blacklist subsequently.

Another kind of solution is to plan in earnest to use ILAT and the many sub-districts of addressing.A kind of possible method is to ignore the least important position of ILAT, only sends most important position.Do like this, can be with a plurality of sub-districts of signaling value addressing.

Another kind of possible method is to send beginning ILAT and ending ILAT, and whole ILAT are between the two piped off.

At last, its member relation in blacklist group (BLG) also can be informed in each sub-district.By each Cell Broadcast CB comprise with BLG as many bit sequence of clauses and subclauses realize this signaling.Provide example in the table 1 below.

Table 1

??ILAT	??BLG ??0123
??ILAT	??BLG ??0123	??1	??1001
??2	??1010	??1	??1001
??2	??1010	??3	??0101
??4	??0000	??3	??0101
??4	??0000	??5	??1010
??6	??0101	??5	??1010
??6	??0101	??7	??0100

As can be seen from Table 1, four BLG are arranged, and the member relation of specific cell is indicated with " 1 " in the group.For example, sub-district 5 is members of

BLG

0 and 2, if any one in these groups is put on the blacklist, 5 of sub-districts can become restricted cell.In the example of Fig. 5, Serving cell, promptly sub-district 5 can send such as 9: 1, this means in the logic district value 9 and the sub-district that belongs to BLG 1 is limited, and promptly the sub-district among the

LCV

93,6 and 7 is limited.Certainly, for the different districts around the LCV that comprises BLG different BLG can be set.For example, if LCV 10 is a Serving cell, 9: 3, promptly the

sub-district

1,3 and 6 of LCV 9 was limited.In addition, the Different L CV in the pattern can be expressed as the difference numbering of sub-district, and then is expressed as the difference numbering of ILAT.

In this solution, the ILAT sub-district can be arranged to send LCV (9) and ILAT numbering, in this case, if provide the information which ILAT to belong to which BLG about to UE, this UE just can determine whether this sub-district should be included in the licensed cells.Alternately, the ILAT sub-district can send LCV and BLG, and it belongs to the 9:[1001 of

BLG

0 and 3 can send definition at 9: 1 such as the sub-district among Fig. 5].Therefore, in this case, there is not ILAT to be sent from the ILAT sub-district.

In addition, Serving cell can be arranged to send similar signal, i.e. 9:[1100], the sub-district that belongs to

blacklist group

0 and 1 in the expression LCV9 should be got rid of from sets of permissions.

In one embodiment, LCV also can implicitly inform by the mode that another broadcasted values is mapped to specific LCV.Suppose that cellular system is just using the cell ID or the cell-ID of some form, then the implicit expression example of informing is: these cell IDs are divided into groups, and each group is pointed to specific LCV.Then, UE only need decipher the LCV that just can obtain concrete sub-district to this cell ID.This cell-ID can for example be static and be stored among the UE to the mapping of LCV.Perhaps, when entering new cell patterns zone, that is: a certain cell patterns zone of coming into force, these mapping relations should be able to be informed by system.If this implicit method is used to broadcast LCV, can further it be expanded to and also inform ILAT.For example,, promptly need 9 bits if need to broadcast 512 cell IDs in the system, these 9 bits can be used for informing 64 Different L CV (6 bit) and still leaving space can inform 8 ILAT (3 bit).

In the prior art,, often cell-ID is encoded in the mode that the UE that can be detected the sub-district obtains immediately in order to allow the fast cell authentication.For example, in LTE, can encode, can obtain this cell-ID so that UE only need just decipher synchronizing channel (SCH) to cell-ID; Wherein, this cell-ID implicitly is encoded to SCH and is gone up one of a plurality of reference sequences.Therefore, use the mapping of above-mentioned LCV to cell-ID, UE can know the LCV of sub-district immediately.Such advantage is to determine LCV very apace.

The method of definite sets of permissions so far, has above been described.Yet even these methods have reduced the number of cells that UE must consider basically, but the measurement capability of UE is still limited, and this all comes from disposal ability and battery consumption.Reporting capabilities is also limited, and this comes from battery consumption and lacks enough Radio Resources.

Therefore, when select measuring (free time and enable mode) and report (enable mode) which sub-district, UE can such as relative distance, come the order of priority of distinguishing cell based on some standards.This just means that UE can measure and/or report more approaching sub-district relatively more frequently.For example, two-layer if sets of permissions comprises, the sub-district of internal layer is just reported more continually than outer field sub-district.Network also can selectional restriction be allowed to UE and reports what sub-districts.

In some cases, the Different L CV in the permission LCV set should be divided into different priority.An example of this situation is between frequency in the moving process, and promptly UE is between two frequencies when mobile.In this case, the sub-district of different frequency has different sizes.For example, frequency is used for macrocell and another frequency is used for Microcell.In this case, owing to do not know the physical location of UE in the cell-of-origin, when bigger sub-district moves to littler sub-district, exist uncertain when it.A such scene has been described among Fig. 6.

Under this scene, the cell set under the target frequency should be thought of as and have identical priority.For example, if UE is positioned at frequency 1,1: in the time of among 5 the bigger sub-district LCV, the

sub-district

4,5,8,9,10,12,13 of second frequency will be considered to have identical priority with 14.As substituting of the specific LCV that informs second frequency, can solve the relaxation problem that the target frequency medium priority is handled by comprising a different relatively parameter of describing cell size between different frequency.For example, can inform the common number of plies by the less sub-district that covers than big sub-district.Certainly, this scheme also can be applied to moving between the wireless access technology (RAT).

Although in conjunction with the LTE system this explanation is described, principle of the present invention can be applied to general honeycomb connecting system, therefore is applicable to any cellular system, includes but not limited to CDMA2000, UMTS and GSM.

Claims

1, the method in a kind of cellular communication system, described communication system comprises a plurality of sub-districts, each described sub-district comprises at least one transmitting set, be used to provide with this cell coverage area in the communicating by letter of at least one subscriber equipment, wherein each described sub-district sends identification data, can derive the position of this sub-district in cell patterns according to this identification data, and described cell patterns is described sub-district relative position each other, it is characterized in that this method comprises:

Transmitting set from Serving cell

-the subscriber equipment in described Serving cell overlay area sends the expression of the subclass of described sub-district, wherein has only the sub-district of described subclass to constitute the licensed cells of carrying out follow-up switching or sub-district gravity treatment to Target cell from described Serving cell.

2, method according to claim 1 is characterized in that, described identification data is represented the position of described sub-district in described cell patterns.

3, method according to claim 1, it is characterized in that, described sub-district in the described pattern is distinguished by the logic district value of the expression position of sub-district in described pattern, and wherein said sub-district send describedly identify the expression that comprises the logic district value to small part.

4, method according to claim 1 is characterized in that, described method further comprises: in described subscriber equipment,

The expression of the licensed cells that-signal that sends based on described sub-district and described transmitting set send generates the set of Target cell.

5, method according to claim 1 is characterized in that, the expression of the subclass of described sub-district comprises following one or more: one or more cell layer around the ultimate range of sub-district, described Serving cell of described Serving cell, the scope of sign.

6, method according to claim 1 is characterized in that, a plurality of described licensed cells are represented by a public expression, and the further transmission of described transmitter will be included in the expression of the one or more additional cell in the sets of permissions of described sub-district.

7, method according to claim 1 is characterized in that, the expression of one or more sub-districts that the further transmission of described transmitter will be got rid of from the sets of permissions of described sub-district.

8, according to claim 6 or 7 described methods, it is characterized in that the expression of described one or more sub-districts comprises following arbitrary: one or more cell layer, one or more cell ID around the described Serving cell.

9, method according to claim 6 is characterized in that, the expression of described additional cell comprises second sign, and described second is designated the sign that the effective simplification sign is derived from described sets of permissions peripheral region.

10, method according to claim 7 is characterized in that, the expression of the described sub-district that will be excluded comprises second sign, and described second is designated the sign that the effective simplification sign is derived in the described sets of permissions.

11, method according to claim 1 is characterized in that, the sign of single position in the described cell patterns is shared in a plurality of sub-districts.

12, method according to claim 11 is characterized in that, shares a plurality of sub-districts of the sign of the position in the described cell patterns and distinguishes by second sign.

13, method according to claim 12 is characterized in that, described a plurality of sub-districts are according to second patterned arrangement in the described cell ID.

14, method according to claim 1 is characterized in that, at least some sub-districts in described a plurality of sub-districts belong at least one blacklist group, and wherein described group member is got rid of in the transmission of the expression of blacklist group from described sets of permissions.

15, method according to claim 14 is characterized in that, the sub-district that belongs to the blacklist group sends the indication of the sign and the one or more blacklist groups under it of sub-district.

16, method according to claim 1 is characterized in that, described subscriber equipment carries out the measurement of feature of the sub-district of described sets of permissions, and the report measurement result.

17, method according to claim 16 is characterized in that, when sending measurement result, according to the second mark for marking sub-district, described second is designated effective simplification sign in the described sets of permissions.

18, method according to claim 16 is characterized in that, described measurement result is reported to described transmitting set.

19, method according to claim 16 is characterized in that, for the sub-district of described sets of permissions provides priority, wherein the sub-district of high priority is more measured more frequently than the sub-district of low priority.

20, method according to claim 19 is characterized in that, described priority is based on the quality of the wireless transmission that sends from described sub-district and/or to the distance of described sub-district.

21, method according to claim 1 is characterized in that, described sign is mapped on the cell ID, thereby allows to determine described sign by definite described cell ID.

22, method according to claim 21 is characterized in that, described cell ID is encoded, and makes when described subscriber equipment detects described sub-district, can decipher it immediately.

23, method according to claim 1 is characterized in that, described pattern is repeated to use, and makes this pattern be repeated repeatedly in described communication system.

24, method according to claim 1 is characterized in that, described transmitting set is a transceiver.

25, method according to claim 1 is characterized in that, described transmitting set is the wireless base station.

26, method according to claim 25 is characterized in that, described transceiver is the Node B of the enhancing in the general land wireless access system of evolution.

27. cellular communication system, described communication system comprises a plurality of sub-districts, each described sub-district comprises at least one transmitting set, be used to provide with cell coverage area in the communicating by letter of at least one subscriber equipment, wherein each described sub-district is arranged to the transmission identification data, can derive the position of described sub-district in cell patterns according to this identification data, and described cell patterns is described described sub-district relative position each other, it is characterized in that described system comprises:

Transmitting set by Serving cell

28, system according to claim 27 is characterized in that, described identification data is arranged to the expression position of described sub-district in described cell patterns.

29, system according to claim 27, it is characterized in that, sub-district in the described pattern is distinguished according to the logic district value, the position of described logic district value representation sub-district in described cell patterns, and wherein send from described sub-district describedly identify the expression that comprises described logic district value to small part.

30, system according to claim 27 is characterized in that, described system further comprises: in described subscriber equipment,

31, system according to claim 27 is characterized in that, the expression of the subclass of described sub-district comprises following one or more: the one or more cell layer of described Serving cell around the ultimate range of sub-district, described Serving cell, the scope of sign.

32, system according to claim 27 is characterized in that, a plurality of described licensed cells are represented by public expression, and described transmitter further is arranged to the expression that transmission will be included in the one or more additional cell in the sets of permissions of described sub-district.

33, system according to claim 27 is characterized in that, described transmitter further is arranged to transmission will be from the expression of one or more sub-districts that described sub-district sets of permissions is got rid of.

34, according to claim 32 or 33 described systems, it is characterized in that, the expression of described one or more sub-districts comprise following any: one or more cell layer, one or more cell ID around the described Serving cell.

35, system according to claim 32 is characterized in that, the expression of described additional cell is arranged to and comprises second sign, and described second is designated the sign that the effective simplification sign is derived from described sets of permissions peripheral region.

36, system according to claim 33 is characterized in that, the expression of the described sub-district that is excluded is arranged to and comprises second sign, and described second is designated the sign that the effective simplification sign is derived from described sets of permissions.

37, system according to claim 33 is characterized in that, a plurality of sub-districts are arranged to the sign of sharing single position in the described cell patterns.

According to the described system of claim 37, it is characterized in that 38, a plurality of sub-districts that are arranged to the sign of the position of sharing described cell patterns are distinguished by second sign.

According to the described system of claim 38, it is characterized in that 39, described a plurality of sub-districts are arranged according to second pattern in the described cell ID.

40, system according to claim 27 is characterized in that, at least some sub-districts of described a plurality of sub-districts belong at least one blacklist group, and wherein described group member is got rid of in the transmission of blacklist group from described sets of permissions.

According to the described system of claim 40, it is characterized in that 41, the sub-district that belongs to the blacklist group is arranged to the indication of sign and its affiliated one or more blacklist groups of transmission sub-district.

42, system according to claim 27 is characterized in that, described subscriber equipment is arranged to the measurement of the feature of the sub-district of carrying out described sets of permissions, and the report measurement result.

According to the described system of claim 42, it is characterized in that 43, when sending measurement result, represent the sub-district according to second sign, described second is designated effective simplification sign in the described sets of permissions.

According to the described system of claim 42, it is characterized in that 44, described measurement result is reported to described transmitting set.

According to the described system of claim 42, it is characterized in that 45, for the sub-district of described sets of permissions provides priority, wherein the sub-district of high priority is more measured more frequently than the sub-district of low priority.

According to the described system of claim 45, it is characterized in that 46, described priority is based on the quality of the wireless transmission that sends from described sub-district and/or to the distance of described sub-district.

47, system according to claim 27 is characterized in that, described sign is mapped on the cell ID, thereby allows to determine described sign by definite described cell ID.

48, according to the described system of claim 47, it is characterized in that, described cell ID is encoded, make when described subscriber equipment detects described sub-district, can decipher it immediately.

49, system according to claim 27 is characterized in that, described pattern is repeated to use, and makes this pattern be repeated repeatedly in described communication system.

50, system according to claim 27 is characterized in that, described transmitting set is a transceiver.

51, system according to claim 27 is characterized in that, described transmitting set is the wireless base station.

According to the described system of claim 51, it is characterized in that 52, described transceiver is the Node B of the enhancing in the general land wireless access system of evolution.

53. subscriber equipment that is used for cellular communication system, described communication system comprises a plurality of sub-districts, each described sub-district comprises at least one transmitting set, be used to provide with described cell coverage area in the communicating by letter of at least one subscriber equipment, wherein each described sub-district is arranged to the transmission identification data, can derive the position of described sub-district in cell patterns according to this identification data, described cell patterns is described sub-district relative position each other, it is characterized in that described subscriber equipment comprises:

-receive the expression of the subclass of described sub-district from the Serving cell transmitting set, wherein have only the sub-district of described subclass to constitute the licensed cells of carrying out follow-up switching or sub-district gravity treatment to Target cell from described Serving cell.

54, according to the described subscriber equipment of claim 53, it is characterized in that, further comprise:

55, a kind of computer program is characterized in that, in the time of in running on computer, computer is carried out according to any described method among the claim 1-26.

56, a kind of computer program is characterized in that, comprises the described computer program of computer-readable medium and claim 55, and wherein said computer program comprises in described computer-readable medium.

57, according to the described computer program of claim 56, it is characterized in that described computer-readable medium comprises following one or more: read only memory ROM, programmable read only memory PROM, EPROM (Erasable Programmable Read Only Memory) EPROM, flash memory, EEPROM (Electrically Erasable Programmable Read Only Memo) EEPROM, hard disk drive.