CN101729107A - Method for controlling downlink power of DPCH - Google Patents
Method for controlling downlink power of DPCH Download PDFInfo
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- CN101729107A CN101729107A CN200810224125A CN200810224125A CN101729107A CN 101729107 A CN101729107 A CN 101729107A CN 200810224125 A CN200810224125 A CN 200810224125A CN 200810224125 A CN200810224125 A CN 200810224125A CN 101729107 A CN101729107 A CN 101729107A
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- tpc
- puch
- scheduling
- dpch
- time slot
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Abstract
The invention discloses a method for controlling downlink power of a DPCH, which comprises that: a mapping relationship of a TPC instruction corresponding to each DPCH time slot and a TPC sign position on a non-scheduling E-PUCH is preset; UE determines a TPC instruction corresponding to each accompany DPCH time slot in the current subframe, determines a corresponding accompany DPCH time slot number for each TPC sign position according to the mapping relationship, bears the TPC instruction corresponding to the number on a corresponding TPC sign position to form a corresponding TPC sign, and sends the TPC sign to a Node B through the non-scheduling E-PUCH; and the Node B determines the accompany DPCH time slot acted by the TPC sign on the non-scheduling E-PUCH according to the mapping relationship and the TPC sign position on the non-scheduling E-PUCH, and performs the downlink power control on the corresponding DPCH time slot. The method can realize the downlink power control of a downlink DPCH when an uplink DPCH does not exist.
Description
Technical field
The present invention relates to power control techniques, the method for controlling downlink power of particularly a kind of DPCH (DPCH).
Background technology
Insert in (HSPA) technology in improved high-speed packet, each HSPA subscriber equipment (HSPAUE) can be assigned with a non-scheduling E-PUCH channel and one and follow descending DPCH channel.Is to follow each time slot of descending DPCH generate downlink power control instruction with following descending DPCH to constitute descending power control ring a: UE according to following the received signal on the descending DPCH by non-scheduling E-PUCH, and by non-scheduling E-PUCH this TPC instruction is sent to NodeB.
But, with regard to how to determine the physical uplink channel (E-PUCH) that non-scheduling strengthens a dedicated channel go up transmission the downlink power control instruction of following descending DPCH at the time slot of DPCH, also there is not at present concrete scheme, therefore, can't utilize the downlink power control instruction of non-scheduling E-PUCH transmission DPCH at present, to carry out the descending power control of DPCH.
Summary of the invention
In view of this, the invention provides the method for controlling downlink power of a kind of DPCH, follow the mapping relations between descending DPCH and non-scheduling E-PUCH in the time of can determining to transmit the downlink power control instruction, thereby realize the descending power control of DPCH.
For achieving the above object, the present invention adopts following technical scheme:
The method for controlling downlink power of a kind of DPCH comprises:
The mapping relations that set in advance TPC character position on each numbering of following the DPCH time slot and the non-scheduling E-PUCH are:
DL
pos＝(SFN′·N
DL_TPCsymbols+TPC
ULpos+((SFN′·N
DL_TPCsymbols+TPC
ULpos)div(N
DLslot)))mod(N
DLslot)
Wherein, DL
PosFor following the numbering of DPCH time slot, SFN ' is current subframe numbers, N
DL_TPCsymbolsBe the TPC total number of symbols that non-scheduling E-PUCH is carried, TPC in a Transmission Time Interval TTI
ULposBe the TPC character position on the non-scheduling E-PUCH, N
DLslotBe to follow the DPCH number of time slot in the subframe, operation is divided exactly in div () expression, and mod () represents modulo operation;
When carrying out descending power control, UE determines that each follows the through-put power control TPC instruction of DPCH time slot correspondence in the current subframe, and according to described mapping relations, is the TPC character position TPC on each non-scheduling E-PUCH
ULposDetermine the corresponding DPCH time-gap number DL that follows
Pos, and the TPC that generates on the descending DPCH time slot with definite time-gap number correspondence instruction is carried on corresponding TPC character position TPC
ULposOn, form corresponding TPC symbol and send to NodeB by non-scheduling E-PUCH;
NodeB is according to the TPC character position TPC on described mapping relations and the described non-scheduling E-PUCH
ULpos, determine on the described non-scheduling E-PUCH the TPC semiotic function follow DPCH time slot DL
Pos, and corresponding DPCH time slot is carried out descending power control.
Preferably, the TPC total number of symbols N that in a TTI, carries of described non-scheduling E-PUCH
DL_TPCsymbolsBe 1 o'clock, TPC
ULposValue be always 1, and in described TTI, the TPC symbol is repeated M time, form M TPC example.
Preferably, described form corresponding TPC symbol and send to NodeB by non-scheduling E-PUCH comprise:
The TPC total number of symbols N that described non-scheduling E-PUCH is carried in a TTI
DL_TPCsymbolsFor N, when the TPC example adds up to M, each non-scheduling E-PUCH time slot carries a TPC symbol, and,
For preceding L non-scheduling E-PUCH time slot, in each time slot the TPC symbol is repeated K+1 time, form K+1 TPC example; For back (N-L) individual non-scheduling E-PUCH time slot, in each time slot the TPC symbol is repeated K time, form K TPC example;
Wherein, K=M div N, L=M mod N.
As seen from the above technical solution, among the present invention, set in advance the mapping relations that each follows TPC character position on DPCH time slot and the non-scheduling E-PUCH.And when carrying out descending power control, UE determines that each follows the through-put power control TPC instruction of DPCH time slot correspondence in the current subframe, and according to described mapping relations, for each follows DPCH time slot DL
PosDetermine the TPC character position TPC on the corresponding non-scheduling E-PUCH
ULpos, the TPC instruction that is used to carry the corresponding DPCH of following time slot forms corresponding TPC symbol and utilizes non-scheduling E-PUCH to send to NodeB; NodeB is according to the TPC character position TPC on described mapping relations and the described non-scheduling E-PUCH
ULpos, determine on the described non-scheduling E-PUCH the TPC semiotic function follow DPCH time slot DL
Pos, and corresponding DPCH time slot is carried out descending power control.
Description of drawings
Fig. 1 is the particular flow sheet of the method for controlling downlink power of DPCH provided by the invention.
Embodiment
For making purpose of the present invention, technological means and advantage clearer, the present invention is described in further details below in conjunction with accompanying drawing.
Basic thought of the present invention is: in downlink power control instruction transmission course, follow between DPCH and non-scheduling E-PUCH and set up mapping relations.
At first introduce the several physical concepts that relate among the present invention.TPC instruction (TPC command) is meant the instruction that raises or reduce power, and TPC symbol (TPC symbol) refers to represent the transmission symbol of TPC instruction, and the TPC symbol is corresponding one by one with the TPC instruction.In the process of transmission TPC symbol, for guaranteeing transmission quality, this TPC symbol repeated several times can be transmitted, Chuan Shu TPC symbol becomes a TPC example (TPC instance) each time.
Fig. 1 is the particular flow sheet of the method for controlling downlink power of DPCH provided by the invention.As shown in Figure 1, this method comprises:
Step 101 sets in advance the mapping relations of TPC character position on each numbering of following the DPCH time slot and the non-scheduling E-PUCH.
Among the present invention, each of foundation follows the mapping relations of TPC character position on the numbering of DPCH time slot and the non-scheduling E-PUCH to be:
DL
pos＝(SFN′·N
DL_TPCsymbols+TPC
ULpos+((SFN′·N
DL_TPCsymbols+TPC
ULpos)div(N
DLslot)))mod(N
DLslot) (1)
Wherein, DL
PosFor following the numbering of DPCH time slot, SFN ' is current subframe numbers, N
DL_TPCsymbolsBe the TPC total number of symbols that non-scheduling E-PUCH is carried, TPC in a Transmission Time Interval (TTI)
ULposBe the TPC character position on the non-scheduling E-PUCH, N
DLslotBe to follow the DPCH number of time slot in the subframe, operation is divided exactly in div () expression, and mod () represents modulo operation.
Provide each as above-mentioned formula (1) and followed DPCH time slot DL
PosWith TPC character position TPC on the non-scheduling E-PUCH
ULposMapping relations, these mapping relations are kept at UE side and NodeB side, like this, the UE side is when being carried at the TPC instruction on the non-scheduling E-PUCH, the position that the E-PUCH that can be used for carrying the TPC order goes up the TPC symbol is known, and UE only need be the TPC character position TPC on each definite E-PUCH according to formula (1)
ULpos, determine that the TPC that should carry on this position orders the time-gap number DL of pairing DL DPCH
Pos, then the TPC order that generates on the pairing descending DPCH time slot of this time-gap number is placed on this position TPC
ULposOn, send to NodeB; After the NodeB side joint is received the TPC symbol, the TPC character position is known, can determine time-gap number according to formula (1) to the pairing DPCH of following of TPC order that carries on should the position, thus determine that TPC symbol on this TPC character position acted on follow the DPCH time slot.As seen, promptly can correctly carry and resolve the TPC instruction, and utilize this TPC instruction to follow the descending power control of DPCH according to above-mentioned mapping relations.Particularly, when carrying out descending power control, carry out following steps:
Step 102, UE determines that each follows the through-put power control TPC instruction of DPCH time slot correspondence in the current subframe.
The operation of this step is identical with existing implementation, just repeats no more here.
Step 103 according to the mapping relations shown in the formula (1), is the TPC character position TPC on each non-scheduling E-PUCH
ULpos, determine the time-gap number DL of the pairing descending DPCH of the following time slot of TPC symbol that carries on this position
Pos, then with the DL that is numbered of the descending DPCH of following
PosThe order that generates of time slot be positioned over this position, send to NodeB by non-scheduling E-PUCH.
In this step, E-PUCH is gone up any one TPC character position TPC
ULposSubstitution formula (1) is calculated the corresponding descending numbering DL that follows the DPCH time slot
Pos, then with descending DPCH at this time slot DL
PosThe corresponding TPC symbol of TPC order that generates is positioned over this position, and sends to NodeB.According to formula (1) when calculating, current subframe numbers SFN ' is known, the TPC total number of symbols N that E-PUCH carries in a TTI
DL_TPCsymbolsWith follow DPCH number of time slot N in the subframe
DLslotKnown parameters for system configuration.
Behind definite TPC character position, the TPC instruction is formed corresponding TPC symbol and send to NodeB on assigned address.Particularly, the mode that non-scheduling E-PUCH is carried the downlink power control instruction of following descending DPCH totally can be divided into following two kinds,
Mode one: non-scheduling E-PUCH is carried a TPC instruction at each TTI.At this moment, N in the formula (1)
DL_TPCsymbolsValue be 1, TPC
ULposValue also be always 1, represent that each E-PUCH TTI sends a descending TPC instruction.When forming the TPC symbol and on non-scheduling E-PUCH, sending, the TPC symbol of E-PUCH in this TTI can be repeated M time, form M TPC example and send.
Mode two: non-scheduling E-PUCH is carried M TPC example in N time slot, and each non-scheduling E-PUCH time slot carries a TPC symbol.Suppose to make K=M div N, and L=M mod N.In the time slot of each non-scheduling E-PUCH, carry S TPC example.Wherein,, in each time slot the TPC symbol is repeated K+1 time, form S=K+1 TPC example for preceding L non-scheduling E-PUCH time slot; For last (N-L) individual non-scheduling E-PUCH time slot, each time slot repeats the TPC symbol K time, forms S=K TPC example.Like this, at each E-PUCH TTI, E-PUCH can carry N the different TPC instruction of relevant descending DPCH, and N
DL_TPCsymbolsValue be N, TPC
ULposValue can get N from 0
DL_TPCsymbols-1, first time slot of expression E-PUCH is to a last time slot.
Step 104, NodeB is according to mapping relations shown in the formula (1) and the TPC character position TPC on the non-scheduling E-PUCH
ULpos, determine on the described non-scheduling E-PUCH the TPC semiotic function follow DPCH time slot DL
Pos, and corresponding DPCH time slot is carried out descending power control.
In this step, NodeB resolves after receiving TPC symbol on the non-scheduling E-PUCH, and concrete analysis mode is: for any one TPC symbol, with the TPC character position TPC at this TPC symbol place
ULposSubstitution formula (1), calculate the numbering DL that follows the DPCH time slot accordingly
Pos, then the represented TPC instruction of this TPC symbol acts on the numbering DL that calculates
PosThe DPCH time slot of following pointed.NodeB promptly can utilize the TPC instruction to following the DPCH time slot to carry out the descending power adjustment accordingly.
So far, the method for controlling downlink power flow process of DPCH provided by the invention finishes.
In the said method flow process, the value of each related parameter in the formula (1) is if change, and then this variation comes into force immediately, promptly adopts new value of consult volume to calculate in the subframe that this value of consult volume changes.
By the said method flow process as seen, among the present invention, the mapping relations between descending DPCH time slot of following that TPC instructs and this instruction is acted on of carrying on the non-scheduling E-PUCH are provided with, and carry out the transmission and the parsing of TPC instruction according to these mapping relations, act on correctly that non-scheduling E-PUCH is entrained TPC instruction and to follow descending DPCH time slot accordingly, thereby realize the descending power control of DPCH.
Being preferred embodiment of the present invention only below, is not to be used to limit protection scope of the present invention.Within the spirit and principles in the present invention all, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (3)
1. the method for controlling downlink power of a DPCH is characterized in that, this method comprises:
The mapping relations that set in advance TPC character position on each numbering of following the DPCH time slot and the non-scheduling E-PUCH are:
DL
pos＝(SFN′·N
DL_TPCsymbols+TPC
ULpos+((SFN′·N
DL_TPCsymbols+TPC
ULpos)div(N
DLslot)))mod(N
DLslot)
Wherein, DL
PosFor following the numbering of DPCH time slot, SFN ' is current subframe numbers, N
DL_TPCsymbolsBe the TPC total number of symbols that non-scheduling E-PUCH is carried, TPC in a Transmission Time Interval TTI
ULposBe the TPC character position on the non-scheduling E-PUCH, N
DLslotBe to follow the DPCH number of time slot in the subframe, operation is divided exactly in div () expression, and mod () represents modulo operation;
When carrying out descending power control, UE determines that each follows the through-put power control TPC instruction of DPCH time slot correspondence in the current subframe, and according to described mapping relations, is the TPC character position TPC on each non-scheduling E-PUCH
ULposDetermine the corresponding DPCH time-gap number DL that follows
Pos, and the TPC that generates on the descending DPCH time slot with definite time-gap number correspondence instruction is carried on corresponding TPC character position TPC
ULposOn, form corresponding TPC symbol and send to NodeB by non-scheduling E-PUCH;
NodeB is according to the TPC character position TPC on described mapping relations and the described non-scheduling E-PUCH
ULpos, determine on the described non-scheduling E-PUCH the TPC semiotic function follow DPCH time slot DL
Pos, and corresponding DPCH time slot is carried out descending power control.
2. method according to claim 1 is characterized in that, the TPC total number of symbols N that described non-scheduling E-PUCH is carried in a TTI
DL_TPCsymbolsBe 1 o'clock, TPC
ULposValue be always 1, and in described TTI, the TPC symbol is repeated M time, form M TPC example.
3. method according to claim 1 is characterized in that, described form corresponding TPC symbol and send to NodeB by non-scheduling E-PUCH comprise:
The TPC total number of symbols N that described non-scheduling E-PUCH is carried in a TTI
DL_TPCsymbolsFor N, when the TPC example adds up to M, each non-scheduling E-PUCH time slot carries a TPC symbol, and,
For preceding L non-scheduling E-PUCH time slot, in each time slot the TPC symbol is repeated K+1 time, form K+1 TPC example; For back (N-L) individual non-scheduling E-PUCH time slot, in each time slot the TPC symbol is repeated K time, form K TPC example;
Wherein, K=M div N, L=M mod N.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200810224125 CN101729107B (en) | 2008-10-16 | 2008-10-16 | Method for controlling downlink power of DPCH |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200810224125 CN101729107B (en) | 2008-10-16 | 2008-10-16 | Method for controlling downlink power of DPCH |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101729107A true CN101729107A (en) | 2010-06-09 |
| CN101729107B CN101729107B (en) | 2013-05-29 |
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| CN 200810224125 Expired - Fee Related CN101729107B (en) | 2008-10-16 | 2008-10-16 | Method for controlling downlink power of DPCH |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102088758A (en) * | 2010-07-01 | 2011-06-08 | 大唐移动通信设备有限公司 | Method, device and system for power control |
| WO2016106683A1 (en) * | 2014-12-31 | 2016-07-07 | 华为技术有限公司 | Downlink control channel transmission method and device |
| WO2017050251A1 (en) * | 2015-09-23 | 2017-03-30 | Huawei Technologies Co., Ltd. | Methods and systems for downlink transmit power control command transmission |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7724813B2 (en) * | 2005-05-20 | 2010-05-25 | Telefonaktiebolaget Lm Ericsson (Publ) | Method and apparatus for transmit power control |
| CN101207416B (en) * | 2006-12-19 | 2012-07-18 | 中兴通讯股份有限公司 | Power control method of high speed sharing control signal channel |
-
2008
- 2008-10-16 CN CN 200810224125 patent/CN101729107B/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102088758A (en) * | 2010-07-01 | 2011-06-08 | 大唐移动通信设备有限公司 | Method, device and system for power control |
| CN102088758B (en) * | 2010-07-01 | 2013-04-03 | 电信科学技术研究院 | Method, device and system for power control |
| WO2016106683A1 (en) * | 2014-12-31 | 2016-07-07 | 华为技术有限公司 | Downlink control channel transmission method and device |
| CN105934917A (en) * | 2014-12-31 | 2016-09-07 | 华为技术有限公司 | Downlink control channel transmission method and device |
| CN105934917B (en) * | 2014-12-31 | 2019-05-03 | 华为技术有限公司 | A kind of downlink control channel transmission and equipment |
| US10314028B2 (en) | 2014-12-31 | 2019-06-04 | Huawei Technologies Co., Ltd. | Method for transmitting downlink control channel and device |
| WO2017050251A1 (en) * | 2015-09-23 | 2017-03-30 | Huawei Technologies Co., Ltd. | Methods and systems for downlink transmit power control command transmission |
| US9918284B2 (en) | 2015-09-23 | 2018-03-13 | Futurewei Technologies, Inc. | Methods and systems for downlink transmit power control command transmission |
| US10356728B2 (en) | 2015-09-23 | 2019-07-16 | Futurewei Technologies, Inc. | Methods and systems for downlink transmit power control command transmission |
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| Publication number | Publication date |
|---|---|
| CN101729107B (en) | 2013-05-29 |
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Inventor after: Wei Limei Inventor after: Tong Xuejian Inventor after: Xing Lijun Inventor before: Wei Limei Inventor before: Tong Xuejian Inventor before: Xing Lijun |
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Granted publication date: 20130529 Termination date: 20161016 |