CN1210978C - Power control method under base station selected diversity transmission - Google Patents
Power control method under base station selected diversity transmission Download PDFInfo
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- CN1210978C CN1210978C CN 02111193 CN02111193A CN1210978C CN 1210978 C CN1210978 C CN 1210978C CN 02111193 CN02111193 CN 02111193 CN 02111193 A CN02111193 A CN 02111193A CN 1210978 C CN1210978 C CN 1210978C
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Abstract
The present invention discloses a power control method under base station selected diversity transmission. The downlink transmitting power comprises two levels of P1 and P2 and is characterized in that the transmitting power in a plot which is not a main plot aims at whether a UE uses the PDSCH of an active and concentrated plot or not and processes respectively, wherein when the UE uses a PDSCH channel of a plot in an active set, the power of a TPC is set as 0, the power of a TFCI and a PILOT are respectively set as P1+PO1 and P1+PO3; when the UE user equipment does not use the PDSCH channel of the plot in the active set, the power of the TPC, the TFCI and the PILOT is all set as 0; if the UE does not use the PDSCH channel of any plot in the active set, the plot which is not a main plot can close the DPDCH output and the DPCCH output of the plot; if the UE uses the PDSCH channel of a certain plot in the active set, when the plot is not the main plot, the plot can close the DPDCH output thereof and the TPC output of the DPCCH. Therefore, interference from other users is reduced, and the advantage of using SSDT under the soft switch is fully exerted.
Description
Technical field
The invention belongs to the mobile communication application technical field, relate in particular to the Poewr control method under a kind of a kind of base station selected diversity emission of WCDMA (Wideband Code Division Multiple Access (WCDMA)) mobile communication system of having used the SSDT technology.
Background technology
SSDT (emission of Site Selective Diversity Transmit base station selected diversity) technology is one of important technology in the advanced mobile communication system, is a kind of macro diversity method under the soft handover, adopts in the WCDMA system.By controlling not transmitting business data of some sub-district, reduce the interference of many sub-districts emission to other users.
Under this method, UE (subscriber equipment) selects a sub-district to be set to the main plot from Active Set, and other sub-district is non-main plot in the Active Set.Main purpose only is from main plot transmitting business data, but not main plot transmitting business data not, thereby can reduce under the soft handoff mode because the interference that brings other users is launched in many sub-districts, guarantee also simultaneously that UE can guarantee the advantage of soft handover not having to obtain the fast base station selection under the network participation.
Under SSDT, the main plot sends DPDCH (Dedicated Physical Data Channel) and DPCCH (Dedicated Physical Control Channel) simultaneously, but not the main plot does not send DPDCH, only send DPCCH, the purpose that sends DPCCH is in order to keep being connected of sub-district and UE on the one hand, is in order to carry out power control on the other hand.By in non-main plot, not sending DPDCH, can avoid interference like this to other users in the sub-district.
Fig. 1 is the structure of time slot diagrammatic sketch of downlink DPCH, and wherein DPDCH and DPCCH are time-multiplexed.Two down transmitting power grade: P1 of a cell management and P2 in system.P1 is used to be provided with the transmitting power of descending DPCCH, and the TFCI in DPCCH (transformat combination indication), TPC (through-put power control) and PILOT (pilot tone) actual emission power are the bias power PO1 that P1 adds definition,, PO2 and PO3.P2 is used for descending DPDCH, if the sub-district is chosen as the main plot, then P2 equals P1, otherwise P2 equals 0, and the sub-district is controlled at P1 and P2 in the power control dynamic range.Fig. 2 A, B are respectively under the SSDT, main plot and non-main plot transmitting power schematic diagram.
Fig. 3 A, B are respectively disclosed standard about 3GPP (third generation partner program) on the WWW.3GPP.0RG website in December calendar year 2001: NEC proposes among the 3GPP TS.214 " physical layer procedures (FDD) " S-SSDT and main plot under the M-SSDT scheme and non-main plot transmitting power schematic diagram.During S-SSDT that NEC proposes and M-SSDT improve one's methods, main plot emission DPCCH and DPDCH, does not launch non-main plot.
Be in UE under the SSDT pattern for certain, when UTRAN by DPCH when it sends downlink service data information, main plot emission DPDCH and DPCCH, but not DPCCH is only launched in the main plot.DPCCH comprises PILOT, TPC and TFCI, and wherein PILOT and TPC are that pilot tone provides the frame boundaries positioning action simultaneously for the control of the power between UE and the sub-district, and TFCI is used to indicate the transformat of business datum.When UE does not utilize PDSCH (Physical Downlink Shared Channel) channel of this sub-district, can obtain the transformat of DPDCH service data information by the DPCCH TFCI information that the main plot sends, at this moment, the TFCI territory that non-main plot sends does not have useful effect, and transmitting power to be the TFCI of P1+PO1 will produce interference to other users in the sub-district; When UE uses the PDSCH channel of certain sub-district, data information transfer form on the PDSCH channel is carried in the TFCI territory among the relevant DPCCH, at this moment, no matter whether this sub-district is non-main plot, this sub-district must issue TFCI information, so that UE decodes to the PDSCH channel of this sub-district by the TFCI territory.And the TPC territory that non-main plot issues is also very little to the effectiveness of uplink power control, will produce interference to other users in the sub-district and transmitting power is the TPC of P1+PO2.
Summary of the invention
The present invention is directed to the defective that the DPCCH control information of non-main plot emission is produced, and the Poewr control method under the improved a kind of base station selected diversity emission that proposes, this method is whether to use the PDSCH channel of certain sub-district in the Active Set according to UE, control the transmitting power of non-main plot DPCCH, thereby reduce interference other users in the sub-district.
In order to realize purpose of the present invention, the technical measures that the present invention takes are: the Poewr control method under a kind of base station selected diversity emission, power under this base station selected diversity emission is the downward special physical channel transmitting power, this down transmitting power comprises P1 and two grades of P2, wherein: P1 is used to be provided with the transmitting power of downlink dedicated physical control channel, and P2 is used to be provided with the transmitting power of downlink dedicated physical data channel, when the sub-district is chosen as the main plot, P2 equals P1, otherwise P2 equals 0; The transmitting power of described Dedicated Physical Control Channel comprises transformat combination indication, through-put power control and pilot tone, wherein: the transmitting power of transformat combination indication is P1+ bias power PO1, the transmitting power of through-put power control is P1+ bias power PO2, and the transmitting power of pilot tone is P1+ bias power PO3; The main plot transmitting power is: P1+ (P1+PO2)+(P1+PO1)+(P1+PO3),
Be characterized in that the transmitting power of non-main plot is handled respectively at the two kinds of situations whether UE (subscriber equipment) uses downlink physical shared channel in sub-district in the Active Set; Wherein:
In subscriber equipment uses Active Set during the downlink physical shared channel (PDSCH channel) of certain sub-district, the power setting of the through-put power control of this non-main plot Dedicated Physical Control Channel (DPCCH channel) is 0, and the power of transformat combination indication and pilot tone is made as P1+PO1 and P1+PO3 respectively;
During the downlink physical shared channel of certain sub-district (PDSCH channel), the power of the control of the through-put power of this non-main plot Dedicated Physical Control Channel (DPCCH channel), transformat combination indication and pilot tone all is not made as 0 in subscriber equipment uses Active Set.
Because the present invention has adopted above technical scheme, UTRAN is by DPCH transmitting downstream business datum, when adopting the SSDT method, if UE does not use the PDSCH channel of certain non-main plot in the Active Set, its DPDCH output and DPCCH output (promptly not transmitting) can be closed in this non-main plot; If UE uses the PDSCH channel of certain non-main plot in the Active Set, the TPC output (promptly not transmitting) of its DPDCH output and DPCCH can be closed in this non-main plot.By the present invention, can reduce interference to other users, give full play to the advantage that adopts SSDT under the soft handover.
Description of drawings
Specific performance feature of the present invention is further specified by following embodiment and accompanying drawing thereof.
Fig. 1 is the structure of time slot diagrammatic sketch (wherein DPDCH and DPCCH are time-multiplexed) of downlink DPCH.
Fig. 2 A, Fig. 2 B are respectively main plot DPCH transmitting power and the non-main plot DPCH transmitting power schematic diagrames under the existing SSDT method.
Fig. 3 A, Fig. 3 B are respectively S-SSDT and main plot DPCH transmitting power under the M-SSDT scheme and the non-main plot DPCH transmitting power schematic diagrames that existing NEC proposes.
Fig. 4 A, Fig. 4 B are respectively main plot of the present invention DPCH transmitting power and non-main plot DPCH transmitting power schematic diagram (UE uses the PDSCH channel of this non-main plot).
Fig. 5 A, Fig. 5 B are main plot of the present invention and non-main plot DPCH transmitting power schematic diagram (UE does not use the PDSCH channel of this non-main plot).
Embodiment
Poewr control method under a kind of base station selected diversity emission, this down transmitting power comprises P1 and two grades of P2, wherein: P1 is used to be provided with the transmitting power of descending DPCCH Dedicated Physical Control Channel, P2 is used to be provided with the transmitting power of descending DPDCH Dedicated Physical Data Channel, when the sub-district is chosen as the main plot, P2 equals P1, otherwise P2 equals 0; The transmitting power of described Dedicated Physical Control Channel comprises TFCI, TPC and PILOT, and wherein: TFCI is P1+PO1, and TPC is P1+PO2, and PILOT is P1+PO3; The main plot transmitting power is: P1+ (P1+PO2)+(P1+PO1)+(P1+PO3), and whether the transmitting power of non-main plot uses the PDSCH Physical Downlink Shared Channel of this non-main plot in the Active Set at the UE subscriber equipment, handles respectively; Wherein:
During the PDSCH channel of certain non-main plot, the power setting of the TPC of this descending DPCCH channel in non-main plot is 0 in the UE subscriber equipment uses Active Set, and the power of TFCI and PILOT is made as P1+PO1 and P1+PO3 respectively;
When the UE subscriber equipment did not use the PDSCH channel of certain non-main plot in the Active Set, TPC, the TFCI of this descending DPCCH channel in non-main plot and the power of PILOT all were made as 0.
Below in conjunction with Fig. 4, the present invention of Fig. 5 more specific description to the Poewr control method under the SSDT:
When being under the SSDT, during the PDSCH channel of certain non-main plot, its DPDCH output and DPCCH output (promptly not transmitting) can not closed in this non-main plot in UE uses Active Set; During the PDSCH channel of certain non-main plot, the TPC output (promptly not transmitting) of its DPDCH output and DPCCH can be closed in this non-main plot in UE uses Active Set.
Two down transmitting power grade: P1 of a common cell management and P2.Wherein P1 is used to be provided with the transmitting power of descending DPCCH, and the TFCI among the DPCCH, TPC and PILOT actual emission power are that P1 adds predefined PO1, a PO2 and PO3 respectively, and P2 is used to be provided with the transmitting power of descending DPDCH.
Shown in Fig. 4 A, Fig. 4 B, if a certain sub-district is chosen as the main plot, then the P2 of this sub-district equals P1, and the power of TFCI, TPC and PILOT is set to P1+PO1, P1+PO2 and P1+PO3 respectively; Otherwise if a certain sub-district is chosen as non-main plot, then P2 equals 0, and during the PDSCH channel of certain non-main plot, the power setting of the TPC of this descending DPCCH channel in non-main plot is 0 in UE uses Active Set, and the power of TFCI and PILOT is made as P1+PO1 and P1+PO3.
Shown in Fig. 5 A, Fig. 5 B, during the PDSCH channel of certain non-main plot, the power of TPC, TFCI and PILOT all is not made as 0 in UE uses Active Set,
In UE does not use Active Set during the PDSCH channel of certain non-main plot, for the DPCCH on this non-main plot, TFCI, TPC, the PILOT information of its carrying are not brought into play useful effect, its transmitting power brings interference can for equally other users simultaneously, therefore in this case, the emission of closing this non-main plot DPCCH can bring performance gain; In UE uses Active Set during the PDSCH channel of certain non-main plot, for the DPCCH on this non-main plot, the TFCI information of its carrying is used for the data on the PDSCH channel are decoded, PILOT information is used for the frame boundaries location, useful effect is not brought into play in the TPC territory, its transmitting power brings interference can for equally other users simultaneously, and therefore in this case, the TPC territory emission of closing non-main plot DPCCH can bring performance gain.
Claims (1)
1, the Poewr control method under a kind of base station selected diversity emission, power under this base station selected diversity emission is the downward special physical channel transmitting power, this down transmitting power comprises P1 and two grades of P2, wherein: P1 is used to be provided with the transmitting power of downlink dedicated physical control channel, P2 is used to be provided with the transmitting power of downlink dedicated physical data channel, when the sub-district was chosen as the main plot, P2 equaled P1, otherwise P2 equals 0; The transmitting power of described Dedicated Physical Control Channel comprises transformat combination indication, through-put power control and pilot tone, wherein: the transmitting power of transformat combination indication is P1+ bias power PO1, the transmitting power of through-put power control is P1+ bias power PO2, and the transmitting power of pilot tone is P1+ bias power PO3; The main plot transmitting power is: P1+ (P1+PO2)+(P1+PO1)+(P1+PO3),
It is characterized in that whether the transmitting power of non-main plot uses two kinds of situations of downlink physical shared channel in sub-district in the Active Set at subscriber equipment, handles respectively; Wherein:
During the downlink physical shared channel of certain sub-district, the power setting of the through-put power control of this non-main plot Dedicated Physical Control Channel is 0 in subscriber equipment uses Active Set, and the power of transformat combination indication and pilot tone is made as P1+PO1 and P1+PO3 respectively;
During the downlink physical shared channel of certain sub-district, the power of the control of the through-put power of this non-main plot Dedicated Physical Control Channel, transformat combination indication and pilot tone all is not made as 0 in subscriber equipment uses Active Set.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02111193 CN1210978C (en) | 2002-03-29 | 2002-03-29 | Power control method under base station selected diversity transmission |
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| CN 02111193 CN1210978C (en) | 2002-03-29 | 2002-03-29 | Power control method under base station selected diversity transmission |
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| CN1210978C true CN1210978C (en) | 2005-07-13 |
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Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100372259C (en) * | 2004-04-02 | 2008-02-27 | 明基电通股份有限公司 | Method for selecting transmission format combination |
| CN100362765C (en) * | 2004-04-07 | 2008-01-16 | 华为技术有限公司 | Power controlling method in base station |
| CN100365950C (en) * | 2004-05-25 | 2008-01-30 | 华为技术有限公司 | A method for acquiring downlink transmitting power of base station system |
| WO2005122434A1 (en) * | 2004-06-11 | 2005-12-22 | Nec Corporation | Transport format combination selecting method, wireless communication system, and mobile station |
| JP4559240B2 (en) * | 2005-01-13 | 2010-10-06 | 株式会社エヌ・ティ・ティ・ドコモ | Mobile communication system, radio base station, radio network controller, and power control method |
| EP1865614B1 (en) * | 2005-02-25 | 2018-06-20 | NEC Corporation | Code series transmitting method, radio communication system, transmitter, and receiver |
| EP1862025B1 (en) * | 2005-03-14 | 2013-10-23 | Telefonaktiebolaget LM Ericsson (publ) | Method and arrangement for improved handover by muting interfering nodes |
| CN101494898B (en) * | 2008-01-25 | 2011-06-22 | 中兴通讯股份有限公司 | Method for coordinating interference between districts |
| CN101730309B (en) * | 2008-10-30 | 2012-06-13 | 中兴通讯股份有限公司 | Method for suppressing interference of wireless communication system |
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