CN1700612A - Downlink power control method in multi-carrier cell - Google Patents
Downlink power control method in multi-carrier cell Download PDFInfo
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- CN1700612A CN1700612A CN 200510077660 CN200510077660A CN1700612A CN 1700612 A CN1700612 A CN 1700612A CN 200510077660 CN200510077660 CN 200510077660 CN 200510077660 A CN200510077660 A CN 200510077660A CN 1700612 A CN1700612 A CN 1700612A
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Abstract
This invention discloses one multi-loading frequency zone downstream linkage power control method, wherein; the requirements comprise frequency load information, downstream time gap interference signal power information. When in need of certain time gap down linkage power adjusting, it first judges whether the current zone is of several frequency or single frequency, wherein, if it is single, then it sends the load frequency information as zero; the receiving end sends power according to down time gap ISCP adjusting linkage; if it of several frequency, it writes into signal channel central frequency in the requirements; the receiving end adjusts the load item power according to the down time gap ISCP values.
Description
Technical field
The present invention relates to downlink power control method in a kind of multi-carrier frequency cell, relate in particular to a kind of TDS-CDMA system (Time Division-Synchronous Code Division Multiple Access, downlink power control method in multi-carrier frequency cell TD-SCDMA).
Background technology
Cellular mobile communication is convenient with it, flexible characteristic has satisfied modern society people work, the demand of life to communicating by letter, and presents the fast-developing impetus.And along with the development of Internet and universal day by day, mobile data services are generally had an optimistic view of.The spectrum efficiency of existing second generation mobile communication and frequency spectrum resource can't be satisfied the demand, and the situation of frequency spectrum resource anxiety occurred in many countries.Be directed to this, International Telecommunication Union has proposed 3G (Third Generation) Moblie.Include Iub interface between radio network controller and the Node B (Node B) and the Iur interface between the radio network controller in the 3-G (Generation Three mobile communication system).
As shown in Figure 1, in the time of need controlling the down link transmitted power of each time slot, control radio network controller (CRNC, Control Radio network controller) sends " downlink power time slot control request (DL POWER TIMESLOT CONTROL REQUEST) " message by Iub interface to Node B (Node B).As shown in Figure 2, service wireless network controller (SRNC, Server Radio network controller) by the Iur interface " downlink power time slot control request " message is sent to drifting radio network subsystem (DRNS, Drift Radio network Subsystem).DRNS is made up of floating radio network controller (DRNC, Drift Radio network controller) and a plurality of Node B.SRNC sends to the message of DRNS, comes down to send to DRNC from SRNC, is sent on the Node B by DRNC again.The purpose that sends " downlink power time slot control request " message is descending time slot ISCP (the Interference Signal Code Power that renewal is provided to Node B/DRNS, Interference Signal Code Power) value, Node B/DRNS uses descending time slot ISCP (the DL Timeslot ISCP) value among " descending time slot ISCP information (the DL Timeslot ISCP Info Low Code Rate TDD) " that comprises in the request message to determine the down link transmitted power of each time slot.That is to say, when descending time slot ISCP value hour, reduce downlink transmission power, when descending time slot ISCP is big, increase downlink transmission power, (Radio Link, RL) whole descending power is constant thereby keep this Radio Link.
In " Radio Link foundation ", " Radio Link increase " or processes such as " synchronised radio link reconfigure ", need to determine the down link initial transmission power of time slot equally.At this moment, CRNC/SRNC sends " Radio Link is set up request (RL Setup Request) " message, " Radio Link increases request (RL Addition Request) " message or message such as " radio link reconfiguration are prepared (RL ReconfigurationPreparation) " to Node B/DRNS respectively, and Node B/DRNS uses descending time slot ISCP (the DL Timeslot ISCP) value in " descending time slot ISCP (DLTimeslot ISCP Info the LCR) " information that comprises in the above-mentioned request message to determine the down link initial transmission power of each time slot.The down link transmission power control signalling interactive process of Iub, Iur interface respectively as Fig. 3,5,7 and Fig. 4,6,8 shown in.
Below the form of aforementioned descending power control request message is described.Request message format such as following table:
Table 1
| Information unit | Exist | Scope | Note |
| Message Type (type of message) | ??M | ||
| Transaction ID (Transaction Identifier) | ??M | ||
| ??DL?Time?Slot?ISCP?Info | ??O | Be used for 3.84Mcps TDD | |
| ??DL?Time?Slot?ISCP?Info?LCR | ??O | Be used for TD-SCDMA | |
| ??Primary?CCPCH?RSCP | ??O | ||
| ??Primary?CCPCH?RSCP?Delta | ??O |
Wherein, letter M represents the item that must comprise, and alphabetical O represents option, and Primary CCPCH RSCP is Primary Common Control Physical Channel received signal code power (Primary Common Control Physical ChannelReceived Singal Code Power).As seen from table, such request message includes DL Timeslot ISCP InfoLCR item, and according to present 3GPP agreement, 1 RL is made of one or more time slots." descending time slot ISCP information " comprises each descending time slot and corresponding " descending time slot ISCP " value of 1 RL.Its concrete form such as following table:
Table 2
| Information unit | Exist | Scope |
| ??DL?Time?Slot?ISCP?Info?LCR | ??1..<maxnoofULtsLCR> | |
| ??＞Time?Slot?LCR | ??M | |
| ??＞DL?Timeslot?ISCP | ??M |
Wherein, maxnoofDLtsLCR represents in the TD-SCDMA system descending time slot of the maximum number that every RL comprises.
In order to increase capacity of cellular network, satisfy the needs of market capacity of cellular network, adopt multi-carrier frequency cell system to increase user capacity, that is to say that there are a plurality of carrier frequency a sub-district, wherein have only a main carrier frequency (carrier frequency of carrying P-CCPCH, send DwPTS and broadcast), other be called assistant carrier frequency.In the TD-SCDMA industry standard of issue in 2004, introduced the notion of multicarrier, therefore, in multi-carrier frequency cell system, a sub-district comprises a plurality of carrier frequency, and according to the requirement of the sector standard, the sub-district in the TD-SCDMA system is not single carrier cell but multi-carrier frequency cell, main carrier frequency and a plurality of assistant carrier frequency can be arranged in the sub-district, and each carrier frequency of a sub-district (main carrier frequency and assistant carrier frequency) all has identical frame structure and structure of time slot.Network side can be assigned to each UE on main carrier frequency or the assistant carrier frequency according to the principle of own resource distribution.Therefore, at multi-carrier frequency cell, for time slot, must indicating it, to belong to which carrier frequency just meaningful.
Present industry standard does not consider that descending time slot ISCP value also must indicate corresponding which carrier frequency and which time slot is just meaningful.This is because distributed each UE (as having set up Radio Link) of private resource to reside on the different carrier frequency.Therefore each UE measures and is reported to the descending time slot ISCP value of Node B, though corresponding identical time slot, also because each UE resides on the different assistant carrier frequencies its reported result difference.
In the single-carrier cell of TD-SCDMA, in the relevant parameter of sub-district, indicated the carrier frequency of this sub-district, the descending time slot ISCP value of this moment needs and time slot correspondence are just passable.And in the multi-carrier district of TD-SCDMA, there are main carrier frequency and a plurality of assistant carrier frequency in the sub-district, and the descending time slot ISCP value of this moment not only needs and this time slot correspondence, also needs corresponding with certain carrier frequency.The technical scheme that does not also address this problem at present.
Summary of the invention
At the existing problem and shortage of downlink power control method in the above-mentioned existing TD-SCDMA system multi-carrier frequency cell, the purpose of this invention is to provide a kind of descending time slot ISCP value and its time slot corresponding and carrier frequency downlink power control method in the multi-carrier frequency cell one to one that guarantees in the multi-carrier district.
The present invention is achieved in that downlink power control method in a kind of multi-carrier frequency cell, may further comprise the steps:
(1) includes carrier frequency information item and downlink time slots Interference Signal Code Power item of information in the descending request message that radio network controller sends, wherein, described carrier frequency information item comprises the information of indicating channel centre frequency, and described downlink time slots Interference Signal Code Power item of information includes the Interference Signal Code Power value of descending time slot and this descending time slot;
(2) in the time need adjusting to the down link transmitted power of each time slot of Radio Link, judge that at first current area is multi-carrier frequency cell or single carrier cell, if single carrier cell, then described radio network controller is put sky with the carrier frequency information item in desiring to send a request message, and receiving terminal is adjusted the down link transmitted power of corresponding time slot according to the Interference Signal Code Power value of the descending time slot of being taken in the descending request message that receives; If multi-carrier frequency cell, write the centre frequency of respective channel in the carrier frequency information item of then described radio network controller in desiring to send a request message, receiving terminal is adjusted the down link transmitted power of this carrier frequency time slot corresponding according to the centre frequency of the Interference Signal Code Power value of the descending time slot of being taken in the descending request message that receives and carrier frequency.
Preferably, described need the adjustment specifically the down link transmitted power of each time slot of Radio Link be meant, sets up process at Radio Link, Radio Link increases needs to determine the down link initial transmission power in process or the synchronised radio link reconfigure set-up procedure; Need to determine the down link transmitted power of each time slot in the downlink power time slot control procedure after Radio Link is set up.
Preferably, described carrier frequency information item and described downlink time slots Interference Signal Code Power item of information can be the item of information arranged side by side in the described wireless link information.
Preferably, described carrier frequency information item is contained in the described downlink time slots Interference Signal Code Power item of information.
Preferably, described radio network controller is control radio network controller or service wireless network controller, and accordingly, described receiving terminal is respectively Node B or drifting radio network subsystem.Described drifting radio network subsystem includes floating radio network controller and connected one or more Node B.
The present invention is directed to the TD-SCDMA system and can support the characteristics of single carrier cell and multi-carrier frequency cell simultaneously, in the request message of downlink power control, increase carrier frequency information, like this, in carrying out the downlink power control procedure, can guarantee the corresponding one by one of DL Timeslot ISCP, time slot and corresponding carrier frequency in the multi-carrier frequency cell, thereby realize the power control requirement of each time slot in the down link of Node B/DRNS.
Description of drawings
Fig. 1 is the Signalling exchange schematic diagram of Iub interface downlink power time slot control procedure;
Fig. 2 is the Signalling exchange schematic diagram of Iur interface downlink power time slot control procedure;
Fig. 3 is the Signalling exchange schematic diagram that the Iub interface Radio Link is set up process;
Fig. 4 is the Signalling exchange schematic diagram of Iur interface wireless link establishment process;
Fig. 5 is the Signalling exchange schematic diagram that the Iub interface Radio Link increases process;
Fig. 6 is the Signalling exchange schematic diagram that Iur interface wireless link increases process;
Fig. 7 is the Signalling exchange schematic diagram that the Iub interface synchronised radio link reconfigure is prepared;
Fig. 8 is the Signalling exchange schematic diagram that Iur interface synchronised radio link reconfigure is prepared;
Fig. 9 is a process chart of the present invention.
Embodiment
With the TD-SCDMA system is example, describes the present invention.
In the downlink power time slot control request message of Iub, Iur interface, increase the carrier frequency information item of this time slot correspondence, be designated as URAFCN.Promptly on the basis of table 1, increase the carrier frequency information item, as following table:
Table 3
| Information unit | Exist | Scope | Note |
| Type of message (Message Type) | M (must, essential) | ||
| Transaction Identifier (Transaction ID) | ??M | ||
| ??DL?Time?Slot?ISCP?Info?LCR | O (optional, optional) | Be used for TD-SCDMA | |
| ??Primary?CCPCH?RSCP | ??O | ||
| ??Primary?CCPCH?RSCP?Delta | ??O | ||
| ??URAFCN | ??O | Only be used for overloading frequently |
Wherein the boldface type of last column partly is the carrier frequency information item of increase, and it has put down in writing the carrier frequency information of time slot correspondence, has promptly put down in writing the centre frequency that characterizes channel characteristics.
Certainly, also can in DL Time Slot ISCP Info LCR item, increase the carrier frequency information item of time slot, table specific as follows:
Table 4
| Information unit | Exist | Scope |
| ??DL?Time?Slot?ISCP?Info?LCR | ??1..<maxnoofDLtsLCR> | |
| ＞time slot (Time Slot LCR) | ??M | |
| ＞descending time slot ISCP (DL Timeslot ISCP | ??M | |
| ??＞URAFCN | ??O | (only being used for multicarrier) |
URAFCN item newly-increased in table 3, the table 4 is an option.
As shown in Figure 9, in the time need adjusting to the down link transmitted power of each time slot, CRNC or SRNC judge that at first current area is multi-carrier frequency cell or single carrier cell, when current area is single carrier cell, then the carrier frequency information item in desiring to send a request message are put sky; When current area is multi-carrier frequency cell, then write the centre frequency of respective channels in the carrier frequency information item in desiring to send a request message.
Node B or DRNS carry out respective handling to it after receiving downlink power time slot control request message.Describe processing procedure in detail below in conjunction with accompanying drawing.
As shown in Figure 1, 2, after Radio Link was set up, CRNC/SRNC can send " DL POWER TIMESLOT CONTROL REQUEST " message to Node B/DRNS at any time; Node B/DRNS receives this request message, if URAFCN is not empty, then by existing gap information in " UARFCN " and " DL Timeslot ISCPInfo LCR " that increase newly and this time slot ISCP value, thereby guarantee all corresponding 1 carrier frequency information (UARFCN) of each descending time slot ISCP value and 1 time slot, shown that each descending time slot ISCP value is at certain carrier frequency and time slot; So just can determine the downlink transmission power of each time slot in conjunction with other parameter (initial downlink link transmitted power, maximum downlink power, minimum downlink power etc.), that is to say, when some time slot interference on the Radio Link big (descending time slot ISCP value greatly), increase the transmitted power of these time slots, some time slot interference on Radio Link is little, reduce the transmitted power of these time slots, thereby keep the whole downlink transmission power of this Radio Link constant.If empty, then according to the descending time slot ISCP value of 1 time slot of this correspondence, and in conjunction with the direct downlink transmission power of definite time slot of other parameter.
Shown in Fig. 3,4,5,6,7,8, in processes such as Radio Link foundation, Radio Link increase and synchronised radio link reconfigure preparation: CRNC/SRNC sends " RADIO LINK SETUPREQUEST ", " RADIO LINK ADDITION REQUEST " or message such as " RADIO LINKRECONFIGURATION PREPARE " to Node B/DRNS.If the UARFCN that comprises in these message is not for empty, then by existing gap information in " UARFCN " and " DL Timeslot ISCP Info LCR " that increase newly and this time slot ISCP value, thereby guarantee all corresponding 1 carrier frequency information (UARFCN) of each descending time slot ISCP value and 1 time slot, shown that each descending time slot ISCP value is at certain carrier frequency and time slot; Thereby determine the down link initial transmission power of each time slot in conjunction with other parameter (initial downlink link transmitted power, maximum downlink power, minimum downlink power etc.).If empty, then according to the direct down link initial transmission power of definite time slot of descending time slot ISCP value.
Certainly; the present invention also can have other various embodiments; under the situation that does not deviate from spirit of the present invention and essence thereof; those skilled in the art work as can make various corresponding changes and distortion according to the present invention, but these corresponding changes and distortion all should belong to the protection range of the appended claim of the present invention.
Claims (6)
1, downlink power control method in a kind of multi-carrier frequency cell is characterized in that, this method may further comprise the steps:
(1) includes carrier frequency information item and downlink time slots Interference Signal Code Power item of information in the descending request message that radio network controller sends, wherein, described carrier frequency information item comprises the information of indicating channel centre frequency, and described downlink time slots Interference Signal Code Power item of information includes the Interference Signal Code Power value of descending time slot and this descending time slot;
(2) in the time need adjusting to the down link transmitted power of each time slot of Radio Link, judge that at first current area is multi-carrier frequency cell or single carrier cell, if single carrier cell, then described radio network controller is put sky with the carrier frequency information item in desiring to send a request message, and receiving terminal is adjusted the down link transmitted power of corresponding time slot according to the Interference Signal Code Power value of the descending time slot of being taken in the descending request message that receives; If multi-carrier frequency cell, write the centre frequency of respective channel in the carrier frequency information item of then described radio network controller in desiring to send a request message, receiving terminal is adjusted the down link transmitted power of this carrier frequency time slot corresponding according to the centre frequency of the Interference Signal Code Power value of the descending time slot of being taken in the descending request message that receives and carrier frequency.
2, downlink power control method in the multi-carrier frequency cell according to claim 1, it is characterized in that, described need the adjustment specifically the down link transmitted power of each time slot of Radio Link be meant, sets up process at Radio Link, Radio Link increases needs to determine the down link initial transmission power in process or the synchronised radio link reconfigure set-up procedure; Need to determine the down link transmitted power of each time slot in the downlink power time slot control procedure after Radio Link is set up.
3, downlink power control method in the multi-carrier frequency cell according to claim 1 is characterized in that, described carrier frequency information item and described downlink time slots Interference Signal Code Power item of information can be the item of information arranged side by side in the described wireless link information.
4, downlink power control method in the multi-carrier frequency cell according to claim 1 is characterized in that, described carrier frequency information item is contained in the described downlink time slots Interference Signal Code Power item of information.
5, according to downlink power control method in the described multi-carrier frequency cell of arbitrary claim in the claim 1 to 4, it is characterized in that, described radio network controller is control radio network controller or service wireless network controller, accordingly, described receiving terminal is respectively Node B or drifting radio network subsystem.
6, downlink power control method in the multi-carrier frequency cell according to claim 5 is characterized in that, described drifting radio network subsystem includes floating radio network controller and connected one or more Node B.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100385822C (en) * | 2005-11-25 | 2008-04-30 | 凯明信息科技股份有限公司 | Discontinuous transmitting state power control method in TD-SCDMA system |
| CN101166346B (en) * | 2006-10-18 | 2010-06-23 | 鼎桥通信技术有限公司 | Method and device for informing user equipment of auxiliary carrier frequency point information by network side |
| WO2010088831A1 (en) * | 2009-02-06 | 2010-08-12 | 中国广东省深圳市 | Reverse power control method based on multi-carrier |
| CN101247165B (en) * | 2007-02-16 | 2011-10-26 | 中兴通讯股份有限公司 | Networking method of TD-SCDMA system multi-frequency point community |
| CN106455031A (en) * | 2015-08-06 | 2017-02-22 | 上海贝尔股份有限公司 | Method and equipment for instructing power distribution in multi-user superposed transmission |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3857602B2 (en) * | 2002-03-06 | 2006-12-13 | 株式会社エヌ・ティ・ティ・ドコモ | Communication control method and communication control system |
| US7106708B2 (en) * | 2003-02-19 | 2006-09-12 | Interdigital Technology Corp. | Method for implementing fast dynamic channel allocation (F-DCA) call admission control in radio resource management |
| ATE352966T1 (en) * | 2003-07-24 | 2007-02-15 | Siemens Spa Italiana | METHOD FOR ESTIMATING INTERFERENCE SIGNAL CODE POWER (ISCP) IN A TD-CDMA SYSTEM |
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2005
- 2005-06-22 CN CNB2005100776600A patent/CN100426697C/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100385822C (en) * | 2005-11-25 | 2008-04-30 | 凯明信息科技股份有限公司 | Discontinuous transmitting state power control method in TD-SCDMA system |
| CN101166346B (en) * | 2006-10-18 | 2010-06-23 | 鼎桥通信技术有限公司 | Method and device for informing user equipment of auxiliary carrier frequency point information by network side |
| CN101247165B (en) * | 2007-02-16 | 2011-10-26 | 中兴通讯股份有限公司 | Networking method of TD-SCDMA system multi-frequency point community |
| WO2010088831A1 (en) * | 2009-02-06 | 2010-08-12 | 中国广东省深圳市 | Reverse power control method based on multi-carrier |
| US8842618B2 (en) | 2009-02-06 | 2014-09-23 | Zte Corporation | Reverse power control methods based on multi carrier |
| CN106455031A (en) * | 2015-08-06 | 2017-02-22 | 上海贝尔股份有限公司 | Method and equipment for instructing power distribution in multi-user superposed transmission |
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| CN100426697C (en) | 2008-10-15 |
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