CN1886971A - Access terminal identification management - Google Patents
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- CN1886971A CN1886971A CN 200480034761 CN200480034761A CN1886971A CN 1886971 A CN1886971 A CN 1886971A CN 200480034761 CN200480034761 CN 200480034761 CN 200480034761 A CN200480034761 A CN 200480034761A CN 1886971 A CN1886971 A CN 1886971A
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Abstract
Access terminal identification management providing a minimum distance between subnets before reusing subnet identifiers. Mobility criteria evaluation determines when to reassign an access terminal identifier. In one embodiment, the mobility criteria is whether any member of the active set for the access terminal belongs to an originating subnet. In an alternate embodiment, the criteria is whether the access terminal has traveled more than a minimum distance from the originating subnet. When a mobility criteria is violated, the access network assigns a new identifier. In one embodiment, the access terminal identifier is a long code mask based on a subnet identifier. Identifier management applies when crossing sector boundaries in a cellular system, and serves to reduce the ambiguity of mapping CC values to full UATI values, and to avoid overlapping assignments.
Description
The priority claim of abideing by 35 U.S.C. § 119
The present patent application request on November 24th, 2003 submit to be entitled as " ACCESSTERMINAL IDENTIFICATION MANAGEMENT (access terminal identifier management) " the 60/524th, the priority of No. 598 provisional application, this application has transferred applicant of the present invention, and is incorporated herein by reference especially herein.
Technical field
The present invention relates generally to communication system, more specifically, relates to the access terminal identifier in the communication system.
Background technology
In cellular radio Communication system, a sub-district can comprise a plurality of sectors.A plurality of sub-districts are subnet of definable then.When travelling carriage (MS) or access terminal (AT) were initiated with the communicating by letter of base station (BS) or access network (AN), available general-purpose accessing terminal identifier (UATI) identified AT.UATI is the subnet at AT place when being directed to initiation of communication specially, that is, and and the subnet at AT place when connecting.The AT that initiates communication in given subnet will be assigned with separately to have the complete UATI of public highest significant position (MSB).The MSB of complete UATI is subnet identifier or " subnet ID ".The least significant bit of complete UATI (LSB) is unique to each AT then.Thus, the MSB of UATI identifies subnet, and the LSB of UATI sign AT.
UATI is 128 bits, and is globally unique.In order to obtain based on UTI's and to be local unique shorter identifier, subnet " colour coding " scheme that is called " CC " is herein divided palette code for each subnet.CC is local 8 unique digital bits, and is provided to the mapping of 104 MSB of the UATI in the same subnet.Using 24 LSB of UATI and CC to come is that each AT generates long code mask (LCM).In fact, the AT in 24 LSB sign subnets of UATI, and CC sign subnet.In an example, 24 of CC and UATI LSB couple together to form LCM.
In case be in the communication process, then LCM does not change.When AT crosses over sub-net boundary, can produce some problems.Because each subnet can comprise a plurality of sub-districts, closely similar subnet may have identical CC.Although for adjacent subnet provides the mapping of CC and UATI mentioned above, AT may enter the subnet with this map information.In the case, when determining complete UATI, can there be uncertainty.In other cases, two AT can be from the different sub-network with identical CC.If the LSB of the UATI of two AT is identical, then the LCM of two AT may be identical, and the result is, from the signal meeting phase mutual interference (that is, mutual multipath occurring disturbs) of two AT.
Exist for the demand that remote station in the wireless communication system generates unique identifier.Further, when travelling carriage is crossed over sector borders (that is, connection status) time on Traffic Channel, also there is the demand of identifier management.The method of precise marking subnet when needing a kind of sub-net boundary in crossing over wireless communication system thus.Also need to generate nonoverlapping subnet mask and identifier information for a plurality of subnets.
Description of drawings
Fig. 1 is a wireless communication system;
Fig. 2 is the wireless communication system that comprises subnet, and wherein, each subnet comprises three sub-districts, and each sub-district comprises six sectors, and this communication system has the colour coding allocative decision for subnet;
Fig. 3 is the flow chart that illustrates an embodiment of the method that is used to access terminal (AT) to distribute long code mask (LCM);
Fig. 4 for being used to provide the network equipment to the control that generates LCM with adapting to mobility criteria;
Fig. 5 illustrates the motion that the AT that has identical LCM but come from different sub-network moves to new subnet;
Fig. 6 is that the colour coding (CC) to communication system is distributed;
Fig. 7 is the flow chart that an alternative embodiment of the method that is used to AT to distribute LCM is described;
The sequential chart that Fig. 8 redistributes for explanation LCM;
Fig. 9 is the flow chart that an embodiment of the method for utilizing mobility criteria to distribute LCM is described.
Embodiment
The HDR subscriber board that is called as access terminal (AT) herein can be mobile or static, and can communicate with one or more HDR base stations that are called modem pool transceiver (MPTs) herein.Access terminal transmits and receive data by one or more modem pool transceiver, and these modem pool transceiver link to each other with the HDR base station controller that is called modulator-demodulator pool controller (MPC) herein.Modem pool transceiver and modulator-demodulator pool controller are parts that is called the network of Access Network.Access Network is transfer data packets between a plurality of access terminal.Access network can further be connected to its outside complementary network, such as company intranet or internet, and can each access terminal and this external network between transmit packet.Set up the access terminal that the effective traffic channel is connected and be called as effective access terminal, and be called as and be in service condition with one or more modem pool transceiver.Being in access terminal in the effective traffic channel connection procedure of setting up with one or more modem pool transceiver is called as to be in and is connected in the state of foundation.Access terminal can be any data set that communicates by wireless channel or the wire message way by for example optical fiber or coaxial cable.Access terminal also can be any one device in the polytype device that includes, but are not limited to PC card, compact flash, outside or internal modems or mobile or fixed line telephone.Access terminal sends the communication link that signal passed through to modem pool transceiver and is called as reverse link.Modem pool transceiver sends the communication link that signal passed through to access terminal and is called as forward link.
Wireless communication system as shown in Figure 2, wherein each hexagon is represented a sub-district.Each sub-district is made up of six sectors.A subnet is formed in three sub-districts.When travelling carriage or access terminal (AT) were initiated with the communicating by letter of accesses network (AN), general-purpose accessing terminal identifier (UATI) was used to identify AT, and generation long code mask (LCM).LCM is based on that 24 least significant bits (LSBs) of colour coding and UATI generate, and colour coding, the UATI when being assigned with Traffic Channel with travelling carriage is relevant.In an example, if be AT distribution service channel, as in the c of Fig. 2 sector, LCM can comprise suitable colour coding and UATI.
Underway in case communicate by letter, when AT crosses over sub-net boundary, may produce some problems.With reference to Fig. 2, subnet 200 comprises three sub-districts.Subnet 200 is assigned with colour coding (CC) " indigo plant ", and its subnet ID with subnet 200 is corresponding.Subnet 200 is adjacent with subnet 400 with subnet 300.Subnet 300 and 400 has identical CC " ash ".Yet the CC of subnet 300 is corresponding with the subnet ID of subnet 300, and the CC of subnet 400 is corresponding with the subnet ID of subnet 400.Subnet 300 and 400 has different sub-network ID.The subnet ID of subnet 300 is S1, and the subnet ID of subnet 400 is S2.What note is that subnet ID is corresponding with the MSB of UATI.If AT enters subnet 200 from the sector ' c ' of subnet 300, then its CC is mapped to subnet IDS1.If AT enters subnet 200 from the sector ' f ' of subnet 400, then its CC is mapped to subnet ID S2.The result is that if the AT visit has the sector at subnet 200 middle parts of colour coding ' ash ', because correct mapping be can not determine in this sector, then the mapping of carrying out from CC to subnet ID may be for indefinite.
Another may conflict with the LCM that from the sector ' f ' enters the AT of subnet 200 for the long code mask (LCM) that from the sector ' c ' enters the AT of subnet 200 mutually with above-mentioned relevant problem.Need generate unique identifier for the remote station in the wireless communication system.Also need when the sector borders in crossing over cellular system, carry out identifier management.
Below discuss an embodiment has been described, wherein, proposed the rule of CC planning.CC is 8 bit fields, thus, can have 256 different values.For the colour coding scheme is provided, stipulate such system, making does not have subnet adjacent with the subnet with identical CC value.A subnet that satisfies this restriction has been shown among Fig. 2 to be implemented.
Fig. 3 has illustrated that by effective pilot set of checking AT (Active Set) be the method that AT distributes LCM.Effectively pilot set (AS) has defined the set of the pilot tone that AT can work.The set of this pilot tone is given AT by AN by channel assignment message.AT is being in the first subnet subnet
1Set up communication when middle.As shown in the figure, in step 500, AN is according to initial subnet
1Distribute the AT identifier, i.e. UATI
1In step 502, AN from subnet
1Corresponding UATI
1Generate LCM with CC, i.e. LCM
1In step 504, AN is with LCM
1Distribute to AT.At decision diamond 506 places, AN determines whether that arbitrary member of the AS of AT belongs to subnet
1If arbitrary member of AS belongs to subnet
1, then keep LCM for AT in step 508
1If all members of the AS of AT do not belong to subnet
1, handle proceed to step 510 with according to AT at subnet
2In current location distribute new identifier.AN in step 512 according to subnet
2UATI
2Generate LCM with CC
2In step 514, AN is with LCM
2Distribute to AT.
Fig. 4 illustrates the AN device that is used for realizing Fig. 3 method.Device 600 comprises transtation mission circuit 610, receiving circuit 616, controller 620 and memory 614, and all said modules link to each other with bus 618 and communicate.Memory 614 can be used to store effective pilot set tabulation of at least one AT.This device comprises access terminal identifier maker, UATI maker 622, LCM maker 612 and mobility evaluation (mobility evaluation) unit 624.Mobility evaluation unit 624 compares current location and the mobility criteria of AT.In one embodiment, mobility criteria is as given in the decision diamond 506, and wherein, mobility evaluation unit 624 judges whether that arbitrary member of AS belongs to the initial subclass of AT.Mobility evaluation unit 624 is retrieved required information arbitrarily from memory 614.Do not satisfy mobility criteria if mobility evaluation unit 624 is judged, then UATI maker 622 is that AT distributes new UATI according to the current location of AT.LCM maker 612 generates LCM according to the new UATI and the CC of the current subclass of AT subsequently.
Only, CC can not solve all the problems referred to above for distributing this added limitations that is applied.Fig. 5 illustrates and a kind of uncertainty is introduced the scheme of CC to UATI mapping.In the case, AT650 sets up communication in the subnet 652 with red CC.AT 660 sets up communication in subnet 656, wherein, subnet 656 also has red CC.When the subnet ID of each subnet not simultaneously, can be the common LSB part that AT 650 and AT 660 distribute UATI.In the case, when AT 650 and AT 660 entered in the same subnet 654 with blue CC, new subnet 654 disturbed the multichannel that one of them is considered as another.
Thus, for reduce that this situation may introduce uncertain and increase UATI and certainty that LCM distributes, an embodiment be that the adjacent subnet of the sector definition in the subnet X is tabulated (NSL), as the set of all subnets adjacent with subnet X.For example, in Fig. 6, the NSL relevant with sector in the subnet " 1 " for set 2,3,4,5,6,7,8,9}.If the CC that the terminal utilization is relevant with subnet Y has constructed LCM, then LCM is considered to belong to subnet Y.If subnet X utilizes the CC relevant with subnet Y to construct LCM, then subnet X is considered to " shadow region " of subnet Y.
If relevant ' d ' of CC planning with in the system is the minimum subnet number of crossing over to another subnet with identical CC from the subnet with given CC.Fig. 6 diagram has the CC programme of 9 CC.Each subnet is by Digital ID.As shown in the figure, from a subnet to another have identical CC subnet be 2 apart from d.The minimum range (MD) of CC planning is defined as the lower limit that equals d/2.For example, in Fig. 6, d equals 2, and MD equals 1.Expectation CC planning has and is at least 1 minimum range.If the minimum subnet number that the sector from subnet ' Y ' is crossed over to the sector in the subnet ' X ' is ' n ', think that then subnet ' X ' and subnet ' Y ' are apart from ' n ' jumping.
When the subnet ID relevant with adjacent subnet all known in each sector, wireless access network can and then pass through to find to obtain this information.In case effectively arbitrary member's of pilot set neighbor belongs to following such subnet, the adjacent subnet tabulation of this subnet does not comprise the subnet ID under the LCM, and then AN or base station controller are closed connection.When rebuilding connection, AT utilizes the new value structure LCM of CC.
Fig. 7 illustrates by estimating the AT mobility and distributes the AT identifier and determine when the method for redistributing new identifier.In step 700, AN distributes and the subnet subnet
1Relevant AT identifier LCM
1, at subnet
1Interior AT sets up communication.In step 702, AN foundation is communicated by letter with AT's.At decision diamond 704 places, AN determines whether AT moves to new subnet, if then determine NSL in step 706 for new subnet.In step 708, AN has judged whether that arbitrary neighboring AS comprises subnet
1The shadow region, if in step 710, AN closes to connect and thinks that AT redistributes LCM.When redistributing connection, AT utilizes the new value of CC, that is, the CC of new subnet constructs LCM.
Fig. 8 illustrates at t
1Interior use of the time period that finishes to a LCM.In the section, AT communicates by letter in the subnet with a CC at this moment.At time t
1The place, AT enters the new subnet with the 2nd CC.Notice that AT may not rebuild communication, up to time t
2Reaching this purpose does not need frequently to close connection, opens but keep connecting when allowing in the subnet ring of terminal around residing at its subnet that receives LCM.
The method that Fig. 9 signal distributes the AT identifier according to an embodiment.At step 800 place, AN is that AT distributes and subnet
1Corresponding first identifier.AN sets up and the communicating by letter of AT in step 802 subsequently.AT enters subnet subsequently
2, in step 804, AN with at subnet
2In AT communication.At decision diamond 806 places, AN judges subnet
2Whether satisfy the mobile standard of AT.If satisfied mobile standard, then keep the AT identifier in step 808 system.If do not satisfy mobile standard, then system is that AT distributes and new subnet subnet
2Corresponding new identifier.
If MD greater than ' 1 ', then can expand this algorithm, wherein, in case effectively arbitrary member's of pilot set neighbor belong to LCM under subnet at a distance of the subnet of jumping more than MD, base station controller can cut out connection.This expansion may need the sector in each subnet to understand them has what to jump apart from particular subnet.This information can provide in infrastructure component.
Thereby the disclosure provides and has been used to distribute the AT identifier to avoid the whole bag of tricks of duplicate allocation to the uncertainty of complete UATI value mapping to reduce the CC value.
Those of skill in the art will recognize that and can utilize any in different technologies and the method to come performance information and signal.For example, the whole above-mentioned data that may mention, instruction, order, information, signal, bit, symbol and chip can be showed by voltage, electric current, electromagnetic wave, magnetic field or particle, light territory or particle or above arbitrarily combination.
Technical staff also further different illustrative logical functional blocks, module, circuit and the algorithm steps described in conjunction with embodiment disclosed herein of understanding can make up with electronic hardware, computer software or both and realizes.In order to offer some clarification on the interchangeability of hardware and software, more than usually with the term description of function separately different illustrative components, functional block, module, circuit and step.This function still is that software realizes depending on application-specific and design constraints to whole system by hardware.The technical staff can distinct methods realizes the described function of each application-specific, but this implementation method determine should not be interpreted as departing to protection scope of the present invention.
The combination that available general processor, digital signal processor (DSP), application specific integrated circuit (ASIC), field programmable gate array (FPGA) or other programmable logic device, discrete gate or transistor logic, discrete hardware components or design are used for carrying out function described herein realizes or carries out different illustrative logical functional blocks, module and the circuit of describing in conjunction with embodiment disclosed herein.General processor can be a microprocessor, but replacedly, this processor can be any traditional processor, controller, microcontroller or state machine.Processor also can be implemented as the combination of calculation element, for example combination of DSP and microprocessor, a plurality of microprocessor, one or more microprocessor that links to each other with the DSP core, or any other this configuration.
The method of describing in conjunction with embodiment disclosed herein or the step of algorithm can directly be included in software module that hardware, processor carries out or above both combination.Software module can reside in RAM memory, flash memories, ROM memory, eprom memory, eeprom memory, register, hard disk, moveable magnetic disc, CD-ROM or arbitrarily in the storage medium known in the art of other form.A kind of exemplary storage medium is connected to processor, makes processor can read information like this from storage medium, or to the storage medium write information.Replacedly, storage medium can be integrated in the processor.Processor and storage medium can reside among the ASIC.ASIC can reside in the user terminal.Replacedly, processor and storage medium can be used as discrete component and reside in the user terminal.
The above-mentioned explanation of disclosed embodiment makes any those skilled in the art can make or use the present invention.Various changes to these embodiment are conspicuous for a person skilled in the art, and the rule of definition can be applied to other embodiment under the situation that does not depart from the spirit or scope of the present invention herein.Thus, the present invention is not limited to embodiment shown here, but meets and the corresponding to broad range of disclosed principle herein and novelty.
Claims (20)
1. access network device, it comprises:
Be used to access terminal to distribute the unit of first identifier, described first identifier is corresponding with first subnet;
Be used for described first subnet in described access terminal set up the unit of communicating by letter;
Be used for the unit of communicating by letter with the described access terminal in second subnet;
Be used to judge whether described second subnet satisfies the unit of the mobility criteria of described access terminal; With
Being used for when described second subnet does not satisfy described mobility criteria is the device that described access terminal is redistributed second identifier, and wherein, described second identifier is corresponding with described second subnet.
2. access network device as claimed in claim 1 is characterized in that, described first identifier is first long code mask.
3. access network device as claimed in claim 2 is characterized in that, described first long code mask comprises the part of the first clean culture access terminal identifier and corresponding to the colour coding of described first subnet.
4. access network device as claimed in claim 1 is characterized in that, the described unit that is used to judge comprises that also arbitrary member of the effective pilot set that is used to judge whether described access terminal belongs to the unit of described first subnet.
5. access network device as claimed in claim 1 is characterized in that, the described unit that is used to judge also comprises:
Be used to generate the unit of the adjacent subnet tabulation of described second subnet; With
Be used to judge whether arbitrary effective pilot set of any neighbor of described adjacent subnet tabulation comprises the unit of the shadow region subnet of described first subnet, and wherein, described first subnet has identical colour coding with described shadow region subnet.
6. device, it comprises:
Access terminal identifier maker, it is applicable to that the function with first subnet generates the access terminal identifier; With
The mobility evaluation unit, it is applicable to whether the current location of judging access terminal satisfies mobility criteria, wherein, does not satisfy mobility criteria in order to respond, described mobility evaluation unit initiates to generate new access terminal identifier.
7. device as claimed in claim 6 also comprises:
Memory Storage Unit, it is applicable to described access terminal stores effective pilot set information,
Wherein, whether described mobility criteria checking has at least one member of effective pilot set of described access terminal to belong to described first subnet.
8. device as claimed in claim 6 also comprises:
Memory Storage Unit, it is applicable to the adjacent subnet tabulation of storage, wherein, whether described mobility criteria inspection has arbitrary effective pilot set of arbitrary neighbor of described adjacent subnet tabulation to have and the identical colour coding of described first subnet.
9. device as claimed in claim 8 is characterized in that, the minimum range that has between the subnet of same color is 1.
10. device as claimed in claim 8 is characterized in that, described access terminal identifier is the long code mask based on clean culture access terminal identifier.
11. device as claimed in claim 10 is characterized in that, described clean culture access terminal identifier is relevant with subnet.
12. device as claimed in claim 10 is characterized in that, described colour coding is the value based on described clean culture access terminal identifier, and it is mapped to subnet identifier.
13. a device, it comprises:
Processing unit, it is applicable to the operation computer-readable instruction; With
Memory Storage Unit, it is applicable to that storage is used for the computer-readable instruction of following operation:
For access terminal is distributed first identifier, described first identifier is corresponding with first subnet;
Set up with the interior described access terminal of described first subnet between communicate by letter;
Communicate with the described access terminal in second subnet;
Judge whether described second subnet satisfies the mobility criteria of described access terminal; With
Be that described access terminal is redistributed second identifier when described second subnet does not satisfy described mobility criteria, wherein, described second identifier is corresponding with described second subnet.
14. method as claimed in claim 13 is characterized in that:
Described mobility criteria judges whether described second subnet and described first subnet are distal at a distance of minimum range,
Described minimum range is to have half of distance between the subnet of same color,
Distance between the described subnet with same color be described in the middle of the number of subnet,
Each colour coding is mapped to subnet identifier.
15. a method, it comprises:
For access terminal is distributed first identifier, described first identifier is corresponding with first subnet;
Set up with described first subnet in described access terminal between communicate by letter;
Communicate with the described access terminal in second subnet;
Estimate the mobility criteria whether described second subnet meets described access terminal; With
Be that described access terminal is redistributed second identifier when described second subnet does not satisfy described mobility criteria, wherein, described second identifier is corresponding with described second subnet.
16. method as claimed in claim 15 is characterized in that, described mobility criteria judges whether described second subnet is distal to minimum range apart with described first subnet.
17. method as claimed in claim 15 is characterized in that, redistributes described second identifier and comprises:
Redistribute message to described access terminal transmission.
18. method as claimed in claim 15, it also comprises:
For described second subnet generates adjacent subnet tabulation.
19. method as claimed in claim 18, it also comprises:
Judge whether arbitrary member of described adjacent subnet tabulation has effective pilot set of the shadow region subnet that comprises described first subnet.
20. method as claimed in claim 19, it also comprises:
If arbitrary member of described adjacent subnet tabulation has effective pilot set of the shadow region subnet that comprises described first subnet, then close and being connected of described access terminal.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US52459803P | 2003-11-24 | 2003-11-24 | |
| US60/524,598 | 2003-11-24 | ||
| US10/960,301 | 2004-10-06 |
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| CN1886971A true CN1886971A (en) | 2006-12-27 |
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| CN 200480034761 Pending CN1886971A (en) | 2003-11-24 | 2004-11-24 | Access terminal identification management |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101467399B (en) * | 2007-04-26 | 2011-08-24 | 华为技术有限公司 | Method for updating united access terminal identification of access terminal and the access terminal |
| CN109069923A (en) * | 2016-04-12 | 2018-12-21 | Cy游戏公司 | Program, information processing unit, information processing method and information processing system |
-
2004
- 2004-11-24 CN CN 200480034761 patent/CN1886971A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101467399B (en) * | 2007-04-26 | 2011-08-24 | 华为技术有限公司 | Method for updating united access terminal identification of access terminal and the access terminal |
| CN109069923A (en) * | 2016-04-12 | 2018-12-21 | Cy游戏公司 | Program, information processing unit, information processing method and information processing system |
| CN109069923B (en) * | 2016-04-12 | 2021-11-09 | Cy游戏公司 | Computer readable medium, information processing apparatus, information processing method, and information processing system |
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