CN100515101C - Method of resource control and softer handoff in centralized base station - Google Patents
Method of resource control and softer handoff in centralized base station Download PDFInfo
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- CN100515101C CN100515101C CNB2004800431401A CN200480043140A CN100515101C CN 100515101 C CN100515101 C CN 100515101C CN B2004800431401 A CNB2004800431401 A CN B2004800431401A CN 200480043140 A CN200480043140 A CN 200480043140A CN 100515101 C CN100515101 C CN 100515101C
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/16—Performing reselection for specific purposes
- H04W36/18—Performing reselection for specific purposes for allowing seamless reselection, e.g. soft reselection
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/0005—Control or signalling for completing the hand-off
- H04W36/0055—Transmission or use of information for re-establishing the radio link
- H04W36/0069—Transmission or use of information for re-establishing the radio link in case of dual connectivity, e.g. decoupled uplink/downlink
- H04W36/00692—Transmission or use of information for re-establishing the radio link in case of dual connectivity, e.g. decoupled uplink/downlink using simultaneous multiple data streams, e.g. cooperative multipoint [CoMP], carrier aggregation [CA] or multiple input multiple output [MIMO]
Abstract
The invention puts forward a technique of channel process unit transferring, which is to solve the hard handoff problem due to the discontinuity of channel resource in centralized base station. According to the invention, when the situation that needs to perform handoff based on the prior art occurs due to the move of mobile terminal, firstly selecting an appropriate objective channel process unit, then transferring the channel process task form the original channel process unit to the objective channel process unit, thereby avoiding the hard handoff between the different channel process unit so as to permit performing softer handoff process in the objective channel process unit.
Description
Technical field
The present invention relates to distributed type base station technology field in the mobile communication system, particularly a kind of system resource control and softer handover method of in the centralized base station systems that adopts radio frequency unit to zoom out, carrying out.
Technical background
In mobile communication system, emission, reception and the processing of wireless signal finished in base station (BTS), traditional BTS mainly is made up of baseband, radio frequency (RF) subsystem and antenna, and a BTS can cover different honeycombs (sub-district) by a plurality of antennas, shown in Fig. 1 (a); Each BTS then links to each other with base station controller (BSC) or radio network controller (RNC) respectively by certain interface, constitutes wireless access network (RAN) thus, shown in Fig. 1 (b).
Fig. 2 has provided another kind of distributed base station, promptly adopts the system configuration of the centralized base station that radio frequency unit zooms out.Compare with the traditional base station, the centralized base station that this employing radio frequency unit zooms out has many advantages: allow to adopt a plurality of Microcells to substitute the macrocell based on the traditional base station, thereby can adapt to different wireless environments better, wireless performances such as the capacity of raising system and covering; Centralized structure makes soft handover to finish with More Soft Handoff, thereby obtains extra processing gain; Centralized structure makes that also expensive base band signal process resource becomes the shared resource pool in a plurality of sub-districts, thereby obtains the benefit of statistic multiplexing, and effectively lowers system cost.PCT patent " WO9005432, Communications system "; United States Patent (USP) " US5657374; Cellular systemwith centralized base stations and distributed antenna units ", " US6324391, Cellular communication with centralized controland signal processing "; Chinese patent application " CN1471331, the base station system of mobile communication "; And U.S. Patent application " US20030171118, Cellular radiotransmission apparatus and cellular radio transmission method " etc. has all disclosed the relevant realization details of this technology.
As shown in Figure 2, the centralized base station systems that adopts radio frequency unit to zoom out mainly is made up of center channel processing subsystem of installing concentratedly and long-distance radio frequency unit (RRU), links to each other by broadband transmission link or network between them.The center channel processing subsystem is made up of functional units such as channel processing resource pond and signal route assignment unit and BSC/RNC interface unit.Wherein the BSC/RNC interface unit is responsible for finishing the user's face and the signaling plane processing of BTS and BSC/RNC interface, the channel processing resource pond is piled up by a plurality of channel banks and is formed, finish work such as base band signal process, signal distribution unit is then according to the difference of each cell business volume (Traffic), the dynamic assignment channel processing resource, it is shared to realize that resources effective is handled in many sub-districts.Signal route assignment unit except as shown in Figure 2 the center channel processing subsystem is inner realize, also can realize in that the center channel processing subsystem is outside.Long-distance radio frequency unit mainly is made of the radio-frequency power amplifier of transmission channel, the functional units such as low noise amplifier, duplexer and antenna of receive path.The link of center channel processing subsystem and long-distance radio frequency unit typically can adopt transmission mediums such as optical fiber, copper cable, microwave; Signal transmission form can be the digital signal after sampling, or modulated analog signal; Signal can adopt baseband signal, intermediate-freuqncy signal or radiofrequency signal.
As mentioned above, thereby the base band signal process resource pool can be shared the benefit that obtains statistic multiplexing for a plurality of sub-districts in the centralized base station, but in real system, restriction owing to factors such as scale that is subjected to integrated circuit and veneer and system complexities, the formation of the base band signal process resource of a fairly large centralized base station is always discontinuous, be that its base band signal process resource is to be combined by a plurality of relatively independent channel banks, so-called be meant that independently they finish the signal processing tasks of respective channel separately and do not have internal signal to interconnect.In fact, because the limited processing ability of each channel bank, when the RRU that can support when centralized base station is larger, first line signal of all RRU can both be exchanged to each channel bank simultaneously just do not have practical significance, simultaneously, be subjected to the restriction of signal route assignment unit and system complexity, the wireless signal of all RRU can both be exchanged to each channel bank simultaneously also to be difficult to realize, therefore, each channel bank can simultaneously treated RRU number of signals always limited, that is to say that the corresponding wireless signal of RRU of this not all centralized base station can both exchange to certain channel bank simultaneously.
With Fig. 3 is example, this centralized base station can be supported M RRU altogether, its base band signal process resource pool is combined by N relatively independent channel bank, is K (K δ M) by signal route assignment elements exchange to the RRU number of signals of each channel bank, that is to say, although the signal of M RRU all can exchange to each channel bank, only allow handshaking to a channel bank of maximum K road RRU simultaneously.
On the other hand, in mobile communication system, when mobile terminal locations moves the coverage that exceeds its Serving cell, its wave point need switch to new sub-district and not be interrupted to guarantee conversation, and in code division multiple access (CDMA) system, adopt soft handover and More Soft Handoff technology to realize typically with handoff procedure frequently.With different from a sub-district direct-cut operation simply to another sub-district, soft handover and More Soft Handoff allow portable terminal to keep simultaneously and the communicating by letter of an above sub-district, promptly allow portable terminal to keep a plurality of Radio Links simultaneously, when set up fully with the communicating by letter of new sub-district after disconnect Radio Link with former sub-district again, thereby effectively reduce handover failure rate and obtain power system capacity and the soft handover gain of covering aspect.Wherein, the difference of soft handover and More Soft Handoff is that More Soft Handoff utilizes the RAKE diversity reception to finish in the base station, and soft handover adopts the selective diversity technology to finish in BSC/RNC, so More Soft Handoff can obtain higher handoff gain.
As mentioned above, the base band signal process resource of a fairly large centralized base station is to be combined by a plurality of relatively independent channel banks, and each channel bank only can be handled the RRU signal of some simultaneously, like this, all commutative when the same channel bank when the RRU wireless signal of the sub-district correspondence that portable terminal switches related, can adopt existing technological model ground such as RAKE diversity reception to realize More Soft Handoff.But, when the RRU wireless signal of the sub-district correspondence that portable terminal switches related can't exchange to same channel bank owing to the quantitative limitation of channel bank RRU number of signals, because the relative independentability of different channel banks, make technology such as being difficult to adopt the RAKE diversity reception realize More Soft Handoff, and on the other hand, only support a user face data passage on the interface logic of centralized base station and BSC/RNC, and traditional soft hand-off is realized in BSC/RNC, therefore, when above-mentioned situation takes place, will be difficult to carry out operating in soft handover in the prior art and be forced to adopt hard-switching technology.
With Fig. 4 is example, and certain centralized base station is made of three relatively independent channel bank # 1, #2, #3, and wherein each channel bank allows to handle simultaneously three road RRU wireless signals at most.Channel bank # 1, #2, #3 all reach maximum RRU wireless signal number between supposing at a time, the RRU signal that is sub-district C1, C2, C3 correspondence is switched to channel bank # 1, the RRU signal of sub-district C4, C5, C6 correspondence is switched to channel bank # 2, the RRU signal of sub-district C7, C8, C9 correspondence is switched to channel bank #3, as shown in the figure, certain portable terminal is pressed path shown in the figure
Move, be not difficult to find out, when this portable terminal moves to C2 by C1, channel bank # 1 will be responsible for carrying out the processing of More Soft Handoff, but, when moving to C6, because the RRU signal of sub-district C6 correspondence can not be switched to channel bank # 1 by C2, therefore this portable terminal direct-cut operation can only be arrived sub-district C6 based on prior art, and carry out corresponding signal process by channel bank #2.Equally, move to C5, C7 by C6 and move to C8 and all can adopt the More Soft Handoff technology, need carry out direct-cut operation but move to C7 by C5.
Because hard-switching technology can not obtain the gain of soft handover and More Soft Handoff, therefore will cause adverse influence to the wireless performance of system, therefore, the present invention is directed to the problems referred to above and proposed a kind of effective solution, this method can be applied to support CDMA (code division multiple access) mobile communication system of soft hand-off, as systems such as IS-95, WCDMA, CDMA2000.
Summary of the invention
As previously mentioned, because the base band signal process resource of a fairly large centralized base station is to be combined by a plurality of relatively independent channel banks, and each channel bank only can be handled the RRU signal of some simultaneously, therefore when the RRU wireless signal of the sub-district correspondence that portable terminal switches related can't exchange to same channel bank owing to the quantitative limitation of channel bank RRU number of signals, for the interface that makes centralized base station and BSC/RNC keeps single user face data passage, need to carry out direct-cut operation in the prior art, thereby can not obtain the gain of soft handover and More Soft Handoff, thereby the wireless performance of system is caused adverse influence.
For this reason, the present invention proposes a kind of channel bank migrating technology and solve the discontinuous direct-cut operation problem of bringing of base band signal process resource in the above-mentioned extensive centralized base station.According to the present invention, above-mentioned need carry out the situation of direct-cut operation based on prior art the time when take place owing to moving of certain portable terminal, at first select an appropriate purpose channel bank, then the Channel Processing task of this portable terminal is moved to this purpose channel bank from the channel bank at its original place, thereby avoid the direct-cut operation between the different channels processing unit and allow in this purpose channel bank, to carry out More Soft Handoff and handle.
According to the present invention, resource control and softer handover method in a kind of centralized base station are provided, described centralized base station (BTS) comprising: long-distance radio frequency unit (RRU), signal route assignment unit, a plurality of channel bank and BSC/RNC interface unit, the external BSC/RNC of described BSC/RNC interface unit (base station controller/radio network controller), described method comprises step: made the decision that certain portable terminal is increased Radio Link by BSC/RNC; Select a purpose channel bank to be migrated; And the migration operation of carrying out this portable terminal channel bank, so that the Channel Processing task of this portable terminal is moved to this purpose channel bank from the channel bank at its original place.
In said method, described Processing tasks is included in processing and the More Soft Handoff diversity of finishing the corresponding physical channel of all Radio Links of this portable terminal on this purpose channel bank and handles.
Description of drawings
The accompanying drawing that is included in this explanation and constitutes this explanation part is used from the explanation embodiments of the invention with the general description one that provides above, provides the detailed description of each embodiment below, is used to explain principle of the present invention, wherein:
Fig. 1 (a), 1 (b) are respectively the schematic diagram of traditional B TS structure and the schematic diagram of wireless accessing network structure;
Fig. 2 is the schematic diagram of the centralized base station systems structure that adopts radio frequency unit and zoom out;
Fig. 3 is centralized base station channel processing resource and wireless signal switching fabric schematic diagram;
Fig. 4 is the schematic diagram of centralized base station channel processing resource;
Fig. 5 is the block diagram based on the handoff procedure of channel bank migrating technology;
Fig. 6 (a), 6 (b) are the schematic diagram of the timing relationship of channel bank transition process.
Embodiment
At first describe to adopt the structure of the centralized base station systems that radio frequency unit zooms out.As shown in Figure 2, the centralized base station systems that adopts radio frequency unit to zoom out mainly is made up of center channel processing subsystem of installing concentratedly and long-distance radio frequency unit (RRU), links to each other by broadband transmission link or network between them.The center channel processing subsystem is made up of functional units such as channel processing resource pond and signal route assignment unit and BSC/RNC interface unit.Wherein the BSC/RNC interface unit is responsible for finishing the user's face and the signaling plane processing of BTS and BSC/RNC interface, the channel processing resource pond is piled up by a plurality of channel banks and is formed, finish work such as base band signal process, signal distribution unit is then according to the difference of each cell business volume (Traffic), the dynamic assignment channel processing resource, it is shared to realize that resources effective is handled in many sub-districts.Signal route assignment unit except as shown in Figure 2 the center channel processing subsystem is inner realize, also can realize in that the center channel processing subsystem is outside.Long-distance radio frequency unit mainly is made of the radio-frequency power amplifier of transmission channel, the functional units such as low noise amplifier, duplexer and antenna of receive path.The link of center channel processing subsystem and long-distance radio frequency unit typically can adopt transmission mediums such as optical fiber, copper cable, microwave; Signal transmission form can be the digital signal after sampling, or modulated analog signal; Signal can adopt baseband signal, intermediate-freuqncy signal or radiofrequency signal.
As mentioned above, thereby the base band signal process resource pool can be shared the benefit that obtains statistic multiplexing for a plurality of sub-districts in the centralized base station, but in real system, restriction owing to factors such as scale that is subjected to integrated circuit and veneer and system complexities, the formation of the base band signal process resource of a fairly large centralized base station is always discontinuous, be that its base band signal process resource is to be combined by a plurality of relatively independent channel banks, so-called be meant that independently they finish the signal processing tasks of respective channel separately and do not have internal signal to interconnect.Because the limited processing ability of each channel bank, when the RRU that can support when centralized base station is larger, the wireless signal of all RRU can both be exchanged to each channel bank simultaneously just do not have practical significance, simultaneously, be subjected to the restriction of signal route assignment unit and system complexity, the wireless signal of all RRU can both be exchanged to each channel bank simultaneously also to be difficult to realize, therefore, each channel bank can simultaneously treated RRU number of signals always limited, that is to say that the corresponding wireless signal of RRU of this not all centralized base station can both exchange to certain channel bank simultaneously.
Handoff procedure based on the channel bank migrating technology
This clearly demarcated channel bank migrating technology has solved the discontinuous direct-cut operation problem of bringing of base band signal process resource in the above-mentioned extensive centralized base station.According to the present invention, above-mentioned need carry out the situation of direct-cut operation based on prior art the time when take place owing to moving of certain portable terminal, at first select an appropriate purpose channel bank, then the Channel Processing task of this portable terminal is moved to this purpose channel bank from the channel bank at its original place, thereby avoid the direct-cut operation between the different channels processing unit and allow in this purpose channel bank, to carry out More Soft Handoff and handle.
Specifically describe the handoff procedure based on the channel bank migrating technology of the present invention below.
According to the present invention, as shown in Figure 5 based on the handoff procedure of channel bank migrating technology.At first follow the prior art basis to pilot frequency intensity, the path loss of wireless channel, the measurement result of wireless parameters such as signal-to-jamming ratio is made the decision that certain portable terminal is increased Radio Link by BSC/RNC, then, BSC/RNC sends the signaling message that increases Radio Link by the interface with BTS to BTS (the following centralized base station that all refers to), after receiving this message, BTS carries out corresponding Message Processing by BTS, BTS will judge that can the wireless signal of the newly-increased pairing RRU of Radio Link be routed to the current affiliated channel bank of this portable terminal afterwards, if BTS judges the wireless signal of the newly-increased pairing RRU of Radio Link and can be routed to the current affiliated channel bank of this portable terminal, then finish the processing and the processing of More Soft Handoff diversity of the corresponding physical channels of all Radio Links of this portable terminal, and need not to carry out the channel bank migration by the current affiliated channel bank of this portable terminal; Otherwise, then need to select a purpose channel bank to be migrated, wherein, the selection of this purpose channel bank should be satisfied following condition at least: this purpose channel bank has enough channel processing resources, and allows that the corresponding RRU handshaking in all sub-districts does not exceed its maximum accessible RRU number of signals to this channel bank in this portable terminal active set (i.e. all pairing set of cells of Radio Link of communicating by letter simultaneously with this portable terminal); If can find the purpose channel bank that satisfies condition, then carry out the migration operation of this portable terminal channel bank, thereby processing and the More Soft Handoff diversity of finishing the corresponding physical channel of all Radio Links of this portable terminal on this purpose channel bank are handled, and send Radio Link increase success message to BSC/RNC; Otherwise BTS does not carry out any handover operation and sends Radio Link increase failed message to BSC/RNC.
Be not difficult to find out, after adopting the channel bank migrating technology of the present invention's proposition, make all switchings in the sub-district that centralized base station is controlled finish by More Soft Handoff, thereby improved the wireless performance of system, and owing to BSC/RNC does not need More Soft Handoff process in the centralized base station is controlled, thereby need not to change prior protocols standard and system architecture.
Channel bank transition process and timing relationship
At first need to prove, when the Radio Link that increases newly in soft handover or the More Soft Handoff starts has two kinds of typical methods at least, a kind of is the method for synchronization, promptly in the signaling message that increases Radio Link, specify the startup moment (representing) that starts this newly-increased Radio Link with radio frame number by BSC/RNC, another kind is asynchronous mode, be that BSC/RNC does not specify concrete moment of enabling this newly-increased Radio Link and definite by BTS oneself, but all these method the present invention are all applicable.
According to the present invention, a kind of timing relationship of channel bank transition process is shown in Fig. 6 (a), promptly in above-mentioned handoff procedure, in case find the purpose channel bank that satisfies condition promptly to start the transition process of channel bank based on the channel bank migrating technology.At first, in the purpose channel bank, distribute corresponding processing resource and dispose the corresponding Channel Processing parameter of all Radio Links of this portable terminal, and with the RRU handshaking of each Radio Link correspondence of this portable terminal to this purpose channel bank, should notice that the present invention does not limit the sequencing of these two operations; Then, in first radio frames before certain definite newly-increased Radio Link starts constantly in the BSC/RNC appointment or by BTS, the corresponding Channel Processing context of each Radio Link of this portable terminal (Context) will be transferred to the purpose channel bank in the former channel bank, wherein, the Channel Processing context is meant the historical relevance data of using in the Channel Processing; At last, specify or start at BSC/RNC constantly to start the Channel Processing of purpose channel bank, stop former channel bank simultaneously to the Channel Processing of this portable terminal and discharge the corresponding resource of handling in this unit this portable terminal by certain newly-increased Radio Link that BTS determines.
In fact, because physical layer channel code and interleaving treatment are unit (length of a TTI is one or more radio frames) with Transmission Time Interval (TTI), the up-downgoing Channel Processing also is that unit carries out with TTI, therefore the Channel Processing of different TTI is comparatively independent, but, actual multipath channel is the channel that continually varying has certain correlation time, so may there be certain contact in the base band signal process between the different TTI.For example, in Wideband Code Division Multiple Access (WCDMA) (WCDMA) system, channel estimating typically adopted the pilot tone interpolation algorithm of a plurality of adjacent time-slots during uplink baseband was handled, pilot data when the channel estimating when then each TTI begins need utilize a TTI to finish, other example also comprise the TPC order of each multipath tracking timing, up reception in the RAKE receiver etc.Therefore, in above-mentioned channel bank transition process, need the historical relevance data in the former channel bank are moved to the purpose channel bank.
Shown in Fig. 6 (a), a grid is represented a TTI length among the figure, begin in the purpose channel bank to distribute at N TTI and handle resource and dispose the corresponding Channel Processing parameter of all Radio Links of this portable terminal accordingly, and with the RRU handshaking of each Radio Link correspondence of this portable terminal to this purpose channel bank; In last radio frames of N+K TTI, the corresponding Channel Processing context of each Radio Link of this portable terminal will be transferred to the purpose channel bank in the former channel bank; N+K+1 TTI begins promptly to start the Channel Processing of purpose channel bank to this portable terminal, stops former channel bank simultaneously to the Channel Processing of this portable terminal and discharge the corresponding resource of handling in this unit.
According to the present invention, another kind of channel bank transition process timing relationship is shown in Fig. 6 (b), this process forward part is identical with channel bank transition process shown in Fig. 6 (a), different has 2 points: the one, and the corresponding Channel Processing context transfer of each Radio Link of portable terminal is to the purpose channel bank in the former channel bank, and start the TTI of purpose channel bank to the Channel Processing of this portable terminal, be certain TTI of a period of time before the newly-increased Radio Link startup constantly that BSC/RNC specifies or BTS determines; The 2nd, after the Channel Processing startup of purpose channel bank to this portable terminal, Channel Processing to this portable terminal in the former channel bank is still carried out, after this start in the time between the arrival constantly at the newly-increased Radio Link that BSC/RNC specifies or BTS determines, only select Channel Processing result by this portable terminal of former channel bank execution, and ignore the Channel Processing result of this portable terminal of carrying out by the purpose channel bank, only when BSC/RNC specifies or BTS determines newly-increased Radio Link start arrive constantly after, select the Channel Processing result of this portable terminal of carrying out by the purpose channel bank again.Afterwards, stop former channel bank again to the Channel Processing of this portable terminal and discharge the corresponding resource of handling in this unit.
Shown in Fig. 6 (b), begin in the purpose channel bank to distribute at N TTI and handle resource and dispose the corresponding Channel Processing parameter of all Radio Links of this portable terminal accordingly, and with the RRU handshaking of each Radio Link correspondence of this portable terminal to this purpose channel bank; In last radio frames of the individual TTI of N+K ', the corresponding Channel Processing context of each Radio Link of this portable terminal will be transferred to the purpose channel bank in the former channel bank; N+K '+1 TTI begins promptly to start the Channel Processing of purpose channel bank to this portable terminal, and former channel bank is still proceeded the Channel Processing of this portable terminal; , only select the Channel Processing result of this portable terminal of carrying out by former channel bank and ignore the Channel Processing result of this portable terminal of carrying out by the purpose channel bank to N+K TTI in the time at N+K '+1 TTI; N+K+1 TTI is the newly-increased Radio Link that BSC/RNC specifies or BTS determines and starts constantly, then select Channel Processing result by this portable terminal of purpose channel bank execution, thereafter, former channel bank stops the Channel Processing of this portable terminal, and the corresponding resource of handling also is released in this unit.
Therefore, channel bank migrating technology according to the present invention has solved the discontinuous direct-cut operation problem of bringing of base band signal process resource in the extensive centralized base station.According to the present invention, above-mentioned need carry out the situation of direct-cut operation based on prior art the time when take place owing to moving of certain portable terminal, at first select an appropriate purpose channel bank, then the Channel Processing task of this portable terminal is moved to this purpose channel bank from the channel bank at its original place, thereby avoid the direct-cut operation between the different channels processing unit and allow in this purpose channel bank, to carry out More Soft Handoff and handle.
Above-mentioned declarative description of the present inventionly in the centralized base station systems that adopts radio frequency unit to zoom out, carry out system resource control and softer handover method, but scope of the present invention is not limited to detail and the exemplary embodiments representing and illustrate here.Reach accompanying drawing and claim according to the above description, those skilled in the art is to be understood that under not breaking away from by following claim and their situation that is equal to the spirit and scope of the present invention that limited, can makes various changes, modifications and variations to it.
Claims (12)
1. resource control and softer handover method in the centralized base station, described centralized base station BTS comprises: long-distance radio frequency unit RRU, signal route assignment unit, a plurality of channel bank and BSC/RNC interface unit, the external base station controller of described BSC/RNC interface unit/radio network controller BSC/RNC, described method comprises step:
Make the decision that certain portable terminal is increased Radio Link by base station controller/radio network controller BSC/RNC;
Select a purpose channel bank to be migrated; And
Carry out the migration operation of this portable terminal channel bank, so that the Channel Processing task of this portable terminal is moved to this purpose channel bank from its former channel bank.
2. the method for claim 1, wherein said Processing tasks are included in processing and the More Soft Handoff diversity of finishing the corresponding physical channels of all Radio Links of this portable terminal on this purpose channel bank and handle.
3. the method for claim 1, wherein, the selection of described purpose channel bank should be satisfied following condition: this purpose channel bank has enough channel processing resources, and allows this corresponding RRU handshaking in all sub-districts of portable terminal active set not exceed its maximum accessible RRU number of signals to this purpose channel bank.
4. the method for claim 1, wherein the migration operation of this portable terminal channel bank comprises:
With the RRU handshaking of each Radio Link correspondence of this portable terminal to this purpose channel bank;
In last radio frames of first Transmission Time Interval TTI before certain newly-increased Radio Link starts constantly, with the corresponding Channel Processing context transfer of each Radio Link of this portable terminal in the former channel bank to the purpose channel bank;
Constantly start the Channel Processing of purpose channel bank in described newly-increased Radio Link startup to this portable terminal.
5. method as claimed in claim 4 also is included in and distributes corresponding processing resource in the purpose channel bank and dispose the corresponding Channel Processing parameter of all Radio Links of this portable terminal.
6. method as claimed in claim 4, wherein said startup are specified by BSC/RNC constantly or are determined by BTS.
7. method as claimed in claim 4, also be included in when starting the purpose channel bank, stop former channel bank to the Channel Processing of this portable terminal and discharge corresponding processing resource in this former channel bank the Channel Processing of this portable terminal.
8. the method for claim 1, wherein the migration operation of this portable terminal channel bank comprises:
With the RRU handshaking of each Radio Link correspondence of this portable terminal to this purpose channel bank;
In last radio frames of certain the Transmission Time Interval TTI of a period of time before certain newly-increased Radio Link starts constantly, the corresponding Channel Processing context of each Radio Link of this portable terminal will be transferred to the purpose channel bank in the former channel bank, and startup purpose channel bank is to the Channel Processing of this portable terminal, wherein after the Channel Processing startup of purpose channel bank to this portable terminal, the Channel Processing to this portable terminal in the former channel bank is still carried out;
In time before described newly-increased Radio Link starts arrival constantly, only select Channel Processing result by this portable terminal of former channel bank execution, and ignore the Channel Processing result of this portable terminal of carrying out by the purpose channel bank, only after described newly-increased Radio Link starts arrival constantly, select Channel Processing result again by this portable terminal of purpose channel bank execution.
9. method as claimed in claim 8 also is included in and distributes corresponding processing resource in the purpose channel bank and dispose the corresponding Channel Processing parameter of all Radio Links of this portable terminal.
10. method as claimed in claim 8, wherein said startup are specified by BSC/RNC constantly or are determined by BTS.
11. method as claimed in claim 8, after also being included in the Channel Processing result of selection, stopping former channel bank the Channel Processing of this portable terminal is also handled resource in this former channel bank of release accordingly by this portable terminal of purpose channel bank execution.
12. as claim 4 or 8 described methods, wherein said Transmission Time Interval TTI is one or more radio frames.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/CN2004/000528 WO2005117462A1 (en) | 2004-05-24 | 2004-05-24 | Method of resource control and softer handoff in centralized base station |
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| CN1957623A CN1957623A (en) | 2007-05-02 |
| CN100515101C true CN100515101C (en) | 2009-07-15 |
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| WO (1) | WO2005117462A1 (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1223775A (en) * | 1996-05-01 | 1999-07-21 | 夸尔柯姆股份有限公司 | Inter-system calling supporting inter-system soft handoff |
| CN1377151A (en) * | 2001-03-22 | 2002-10-30 | 深圳市中兴通讯股份有限公司 | Resource allocation method on switching for CDMa base station system |
| US6594496B2 (en) * | 2000-04-27 | 2003-07-15 | Lgc Wireless Inc. | Adaptive capacity management in a centralized basestation architecture |
-
2004
- 2004-05-24 WO PCT/CN2004/000528 patent/WO2005117462A1/en active Application Filing
- 2004-05-24 CN CNB2004800431401A patent/CN100515101C/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1223775A (en) * | 1996-05-01 | 1999-07-21 | 夸尔柯姆股份有限公司 | Inter-system calling supporting inter-system soft handoff |
| US6594496B2 (en) * | 2000-04-27 | 2003-07-15 | Lgc Wireless Inc. | Adaptive capacity management in a centralized basestation architecture |
| CN1377151A (en) * | 2001-03-22 | 2002-10-30 | 深圳市中兴通讯股份有限公司 | Resource allocation method on switching for CDMa base station system |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2005117462A1 (en) | 2005-12-08 |
| CN1957623A (en) | 2007-05-02 |
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