CN101257342B - Method for effectively enhancing multi-carrier frequencies district common channel and service channel cover - Google Patents
Method for effectively enhancing multi-carrier frequencies district common channel and service channel cover Download PDFInfo
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Abstract
The invention provides a method effectively enhancing the coverage of common channel and traffic channel in a multi- frequency district, relating to a power controlling method in multi- frequency district. In the existing TD-SCDMA protocol, a defined district divides the total power of the base station equally when establishing a district, therefore the total power of the district is low in running and the support to special traffic is poor. In a TD-SCDMA multi-frequency district, the invention distributes the total power to all the frequencies in time slot in sharing mode, the sum of emission power of all the frequencies in the time slot is not larger than the most emission power, thus enhancing the utilization ratio of the base station, and the support to the traffics such as MBMS, HSDPA, etc.
Description
Technical field
The present invention relates in TD-SCDMA (the Time Division-Synchronization Code DivisionMultiple Access TD SDMA) system a kind of method that improves multi-carrier frequencies district common channel and Traffic Channel covering.
Background technology
TD-SCDMA is one of third generation mobile air interface technical standard of the formal issue of ITU (International Telecommunication Union International Telecommunications Union), TD-SCDMA is the same with other 3G mobile communication standard, in order to satisfy the ever-increasing demand in mobile communication market, increase power system capacity, often adopt and in same sectors/cells, carry out the method that overloading covers frequently.
Multi-carrier frequency cell uses a plurality of carrier waves to increase cell capacity, improves system effectiveness.Each carrier power was identical when TD-SCDMA protocol definition residential quarter was set up at present, and namely total base station power is divided equally at each carrier wave, is that the mode that unit is divided equally exists following shortcoming with the carrier wave:
1) maximum power of each carrier wave is reduced to gross power except being carrier number from the gross power of NodeB (base station) in theory.Make and the high-rise absolute magnitude that when carrying out resource management, can not take full advantage of total base station power to cause vacant power " fragment " at each carrier wave easily, and these power can't be concentrated to redistribute to use and cause waste;
2) poor to the tenability of particular service.For some particular service, such as MBMS (multimedia multicast broadcast service), group service, required descending power can be bigger than general service demand, for with the carrier wave being the TD-SCDMA base station that power is divided equally by unit, particular service obtainable maximum downstream power limited all assign to value on each carrier wave in total base station power, make the covering of particular service littler than the coverage of general service like this;
3) poor to the tenability of HSDPA (High Speed Downlink Packet high speed downlink grouping traffic).Because the descending power demand of HSDPA business is bigger than speech business, to UE (UserEquipment, when subscriber equipment) having HSDPA business and speech business simultaneously, then can support good cell edge for speech business, the HSDPA business then is difficult to guarantee speed and quality;
4) total base station power can not be fully utilized, and causes the power resource waste.Under the multi-carrier frequency system, TS0 (the Timeslot of assistant carrier frequency, time slot) generally do not use, so each channel and DwPCH (Downlink Pilot Channel on the TS0 of main carrier frequency, downlink pilot frequency channel) channel will be subject to carrier power, since common signal channel do not have the figuration gain of smart antenna, result be public covering meeting much smaller than the covering of dedicated channel, and these power of auxilliary carrier wave do not cause the power resource waste because do not use;
In sum, be that above-mentioned shortcoming will be caused in the multi-carrier TD-SCDMA base station that power is divided equally by unit simply with the carrier wave when actual networking is used, therefore need to improve definition and the using method of multi-carrier frequency cell power, in the hope of improving the covering of common signal channel and Traffic Channel.
Summary of the invention
Problem at existing in the Poewr control method in the above-mentioned existing TD-SCDMA system multi-carrier frequency cell the purpose of this invention is to provide the method that a kind of effective raising multi-carrier frequencies district common channel and Traffic Channel cover.
The present invention is achieved in that
Distribute residential quarter gross power between all carrier frequency in the mode shared in time slot, the transmitting power sum of all carrier frequency is no more than the transmitting power of residential quarter maximum in the time slot.
Method as described, when the residential quarter was set up, RNC (Radio Network Control, radio network controller) sent the residential quarter to NodeB and sets up request message, and carried the parameter of expression residential quarter maximum transmission power, shared power in time slot between all carrier frequency; NodeB receives that the residential quarter of RNC sets up request message, sends the residential quarter to RNC and sets up response message; At any time, the transmitting power sum of all carrier frequency does not allow to surpass residential quarter maximum transmission power parameter in the time slot.
Method as described, when cell re-configuration was put, RNC sent cell re-configuration to NodeB and puts request message, and carried the parameter of expression residential quarter maximum transmission power, shared power in time slot between all carrier frequency; NodeB receives that the cell re-configuration of RNC puts request message, sends cell re-configuration to RNC and puts response message; At any time, the transmitting power sum of all carrier frequency does not allow to surpass residential quarter maximum transmission power parameter in the time slot.
Among the present invention, definition and using method that multifrequency is carried cell power have been redefined, use method of the present invention, multifrequency is carried the gross power that can use NodeB on the Power Theory of time slot common signal channel of residential quarter, the multi-carrier frequency cell technology of comparing original has improved the overall utilization of cell power; Can obviously improve professional covering such as MBMS, HSDPA; Under multi-carrier frequency system, the power of each carrier frequency is owing to the user moves, the professional different unbalanced problems that cause also can solve simultaneously.
Description of drawings
Fig. 1 is for realizing the flow process of setting up of residential quarter among the embodiment.
Fig. 2 is for realizing the flow process of reshuffling of residential quarter among the embodiment.
The RRC that Fig. 3 realizes for embodiment sets up or business is set up flow process.
Embodiment
The core concept of described method of the present invention is definition and the use that changes cell power, and the power of residential quarter is shared in time slot.Below in conjunction with accompanying drawing embodiments of the invention are described in detail.
Each carrier power was identical when the protocol definition residential quarter was set up before changing, i.e. the total base station power mode of dividing equally at each carrier wave.The present invention adopts shared mode to distribute the gross power of residential quarter between all carrier frequency in time slot, and the transmitting power sum of all carrier frequency all must not surpass the maximum transmission power of residential quarter in the time slot.
After adopting described power shared model, realize the foundation of residential quarter, as shown in Figure 1, this is set up flow process and mainly may further comprise the steps:
After adopting described power shared model, realize that cell re-configuration puts, as shown in Figure 2, this is reshuffled and sets up flow process and mainly may further comprise the steps:
The definition of parameter " Maximum Transmission Power " and span are referring to 25.433 agreement 9.2.1.40.
After adopting described power shared model, the RRC that realizes set up and the professional flow process of setting up as shown in Figure 3, this handling process mainly may further comprise the steps:
Step 302-10 if the transmitting power Pti of all down channel place time slots is not more than power threshold Pt, then allows RRC to set up or professional foundation, carries out RRC foundation and business and sets up flow process; Otherwise change S302-20;
Wherein: Pti=Pi+Po
Pti: insert time slot i behind this user all descending powers and; (i=1 ... the maximum timeslot number that the user distributes)
Pi: the active user all down channel Initial Transs of time slot i and; (i=1 ... the maximum timeslot number that the user distributes)
Poi: in the time slot i all other channel transmitting power and; (i=1 ... the maximum timeslot number that the user distributes)
Step 302-20, refusal RRC sets up or business is set up flow process.
Those skilled in the art should be appreciated that among the present invention that RNC can use power for the different maximum of different allocation of carriers according to customization, and the power threshold of different carrier frequency also can be different.
Claims (3)
1. one kind is improved the method that multi-carrier frequency cell common channel and Traffic Channel cover, it is characterized in that, with the mode shared is distributed the residential quarter between all carrier frequency in time slot gross power, the transmitting power sum of all carrier frequency all must not surpass the maximum transmission power of residential quarter in the time slot; When the residential quarter was set up, RNC sent the residential quarter to NodeB and sets up request message, and carried the parameter of expression residential quarter maximum transmission power, shared power in time slot between all carrier frequency; NodeB receives that the residential quarter of RNC sets up request message, sends the residential quarter to RNC and sets up response message; At any time, the transmitting power sum of interior all carrier frequency of time slot all is no more than the parameter of residential quarter maximum transmission power.
2. the method for claim 1 is characterized in that, when cell re-configuration was put, RNC sent cell re-configuration to NodeB and puts request message, and carried the parameter of expression residential quarter maximum transmission power, shares power in time slot between all carrier frequency; NodeB receives that the cell re-configuration of RNC puts request message, sends cell re-configuration to RNC and puts response message; At any time, the transmitting power sum of interior all carrier frequency of time slot all is no more than the parameter of residential quarter maximum transmission power.
3. the method for claim 1 is characterized in that, RNC can distribute to the different maximum of different carrier frequency according to customization and use power and different power threshold.
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| Application Number | Priority Date | Filing Date | Title |
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| CN 200710127703 CN101257342B (en) | 2007-03-01 | 2007-06-18 | Method for effectively enhancing multi-carrier frequencies district common channel and service channel cover |
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| CN200710085350.2 | 2007-03-01 | ||
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| CN 200710127703 CN101257342B (en) | 2007-03-01 | 2007-06-18 | Method for effectively enhancing multi-carrier frequencies district common channel and service channel cover |
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| CN101257342A CN101257342A (en) | 2008-09-03 |
| CN101257342B true CN101257342B (en) | 2013-08-21 |
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| CN102196541B (en) * | 2010-03-19 | 2015-04-01 | 中兴通讯股份有限公司 | Method and system for realizing multi-carrier enhanced uplink access power sharing management |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1251731A (en) * | 1997-03-27 | 2000-04-26 | 诺基亚电信公司 | Method for channel allocation utilizing power restrictions |
| CN1902968A (en) * | 2003-11-06 | 2007-01-24 | 松下电器产业株式会社 | Transmission power range setting during channel assignment for interference balancing in a cellular wireless communication system |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1251731A (en) * | 1997-03-27 | 2000-04-26 | 诺基亚电信公司 | Method for channel allocation utilizing power restrictions |
| CN1902968A (en) * | 2003-11-06 | 2007-01-24 | 松下电器产业株式会社 | Transmission power range setting during channel assignment for interference balancing in a cellular wireless communication system |
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