CN101247146B - Power control method of physical channel mapped by high speed descending sharing channel - Google Patents
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Abstract
The present invention discloses a method for controlling the power of the physical channel mapped by the high-speed descending sharing channel, and the method comprises the following steps: (a) informing the maximum emitting power of the physical channel mapped by the high-speed descending sharing channel by the wireless network controller, and the maximum emitting power is the deviation value between the emitting power which is needed when the subscriber facility correctly receives the data with the high-speed descending sharing channel at the edge of the subdistrict and the emitting power of the common pilot channel; (b) when the wireless network controller transmits the data which needs to be transmitted to the subscriber facility to the base station, carrying the emitting power level used in transmitting the data in the data frame of the high-speed descending sharing channel; and (c) when the base station transmits data to the subscriber facility, confirming the emitting power which is actually used by the physical channel according to the pre-obtained maximum emitting power, the emitting power level and the emitting power of the common pilot channel, and transmitting signaling and/or data to the subscriber terminal.
Description
Technical field
The present invention relates to a kind of Poewr control method of strengthening the physical channel mapped by high speed descending sharing channel under the connection mode common condition in the GSM.
Background technology
In order to improve the throughput of high data traffic of user and system; The R5 standard agreement of 3GPP has been introduced a kind of high-speed packet and has been shared transmission channel (High Speed Downlink Shared Channel:HS-DSCH); The physical channel that this channel shone upon adopts time-division and sign indicating number branch mode; And this channel has adopted and has mixed (HARQ) and Adaptive Modulation and Coding (AMC) technology of retransmitting automatically, makes peak rate can reach 10.8Mbps～30Mbps.Its final purpose is through providing high speed packet service to be inserted the capacity that increases system and reduces transmission delay to improve the requirement of user to service quality (QoS).
Agreement is to use Secondary Common Control Physical Channel (S-CCPCH) to carry out the transmission of signaling and data for the subscriber equipment of the front access state (CELL_FACH) under Radio Resource control (RRC) connection mode at present; The subscriber equipment of the paging state (CELL_PCH/URA_PCH) under Radio Resource control (RRC) connection mode is to use Secondary Common Control Physical Channel (S-CCPCH) to carry out the reception of beep-page message; Based on the S-CCPCH channel is channel shared by multiple users; The function that does not have closed-loop power control; Therefore in order to guarantee that the user who covers the edge also can correctly receive signaling and data; The ratio that its power will be provided with is higher, therefore for reduce CELL_FACH with (or) the shared power resource of CELL_PCH/URA_PCH state, the bandwidth of S-CCPCH has certain restriction.
Can through be increased in CELL_FACH with (or) the CELL_PCH/URA_PCH state uses high speed shared channels, improve effective peak speed and reduce the time-delay that signaling CELL_FACH, CELL_PCH, URA_PCH state is under delayed time and reduced state exchange.Therefore the 3GPP consensus standard to Radio Resource control (RRC) connection mode down front access state (CELL_FACH) and (or) paging state (CELL_PCH/URA_PCH) controlled under (RRC) connection mode of Radio Resource strengthens; Promptly CELL_FACH with (or) the CELL_PCH/URA_PCH state also can use high speed shared channels technology (this paper is in CELL-FACH and (or) CELL_PCH/URA_PCH state use the ability of high speed shared channels to abbreviate as strengthen the connection mode common condition); Short time interval, HARQ and AMC mechanism through the high speed shared channels technology improve the effective peak speed of strengthening the connection mode common condition.The shared control channel (HS-SCCH) that the public physic channel relevant with high speed shared channels has high-speed physical downlink shared channel (HS-PDSCH) (HS-PDSCH) and use for high speed descending sharing channel; The physical channel of sharing for the high speed that guarantees to strengthen the connection mode common condition can operate as normal, need carry out power control to these two physical channels.
Yet, to the subscriber equipment of CELL_FACH and/or CELL_PCH/URA_PCH state, also these two physical channels are not carried out the method that power is controlled at present.
Summary of the invention
Technical problem to be solved by this invention provides a kind of Poewr control method of physical channel mapped by high speed descending sharing channel; A kind of relevant physical channel Poewr control method of high speed descending sharing channel under the connection mode common condition of strengthening is provided; Make the base station can use suitable power to send when the subscriber equipment of strengthening under the connection mode common condition sends data, guarantee the correct reception of subscriber equipment for being in.
In order to solve the problems of the technologies described above, the invention provides a kind of Poewr control method of physical channel mapped by high speed descending sharing channel, may further comprise the steps:
(a) radio network controller is through the maximum transmission power of signaled base station physical channel mapped by high speed descending sharing channel, and said maximum transmission power is that subscriber equipment adopts said high speed descending sharing channel correctly to receive the deviate of needed transmitting power of data and CPICH Common Pilot Channel transmitting power at cell edge;
When (b) the radio network controller data that send needs to subscriber equipment send to the base station; In the Frame of high speed descending sharing channel, carry the transmit power level of using when transmitting these data, said transmit power level is the deviate that the current present position of subscriber equipment correctly receives needed transmitting power of data and said maximum transmission power;
(c) said base station is when subscriber equipment sends data; The transmitting power of said maximum transmission power, transmit power level and CPICH Common Pilot Channel that foundation obtains is in advance confirmed the transmitting power of the actual use of said physical channel, uses this transmitting power to send signaling and/or data to said user terminal.
Further, said method also can have following characteristics: in said step (a), said signaling is that Common transport channel is set up request message or Common transport channel reconfiguration request message.
Further; Said method also can have following characteristics: in said step (b); Said radio network controller is according to the measurement result to CPICH Common Pilot Channel of user equipment to report, the size of media access control protocol data unit and the transmit power level that said maximum transmission power calculates said physical channel, and the measurement result of said CPICH Common Pilot Channel is the signal interference ratio of CPICH Common Pilot Channel or the reception signal strength signal intensity or the path loss of CPICH Common Pilot Channel; When the signal interference ratio of said CPICH Common Pilot Channel big more, perhaps when the reception signal strength signal intensity of CPICH Common Pilot Channel strong more, then this moment, needed transmit power level was more little; When path loss big more, perhaps when the size of media access control protocol data unit big more, then this moment, needed transmit power level was also big more.
Further, said method also can have following characteristics: utilize path loss to calculate said transmit power level and adopt following formula:
Wherein, TPL is a transmit power level, and L is the path loss of user equipment to report, N
TBe noise power, γ is a nonorthogonal factor, and i is the interference factor of neighbor cell, and load is the current area load, E
b/ N
oBe signal interference ratio, PG is a processing gain, and said PG equals the ratio W/R of bandwidth and service rate, wherein, and W=3.84M,
Round in the expression, MacPduSize is the size of protocol Data Unit relevant in the Frame, and CpichPower is the transmitting power of CPICH Common Pilot Channel, and MaxHsPower is a maximum transmission power entrained in the signaling;
Utilize the signal interference ratio of CPICH Common Pilot Channel to calculate said transmit power level and adopt following formula:
TPL＝Min(CPICH_Ec/Nomin-CPICH_Ec/No，0)
Wherein, CPICH_Ec/N0 is the signal interference ratio of CPICH Common Pilot Channel, and CPICH_Ec/N0min is the signal interference ratio of the position common pilot signal of cell edge.
Further, said method also can have following characteristics: subscriber equipment reports its measurement result to CPICH Common Pilot Channel through cell update request message, wireless resource control connection request message or measurement report message to radio network controller.
Further, said method also can have following characteristics: in said step (c), the actual transmitting power of using of said physical channel is CPICH Common Pilot Channel transmitting power and said maximum transmission power and said transmit power level sum.
Further, said method also can have following characteristics: said physical channel is control channel HS-SCCH and the one or more high-speed physical downlink shared channel (HS-PDSCH) HS-PDSCH that is used for high speed descending sharing channel.
Further; Said method also can have following characteristics: in said step (c); Confirm HS-SCCH channel and HS-PDSCH channel transmitting power according to the transmitting power of the actual use of said physical channel and the power division ratio of HS-SCCH and HS-PDSCH, said power division ratio is ratio and the product of weight of the spreading factor of the two.
Further, said method also can have following characteristics: when HS-PDSCH has many, give every HS-PDSCH with HS-PDSCH channel transmitting power mean allocation.
Further; Said method also can have following characteristics: in said step (c); If in a Transmission Time Interval, having a plurality of data blocks to be multiplexed in the media access control protocol data unit is sent out; Then the HS-SCCH channel transmitting power is got the maximum of a plurality of data block transmitting powers; The HS-PDSCH channel transmitting power is got the transmitting power sum of these a plurality of data blocks, and the transmitting power sum of HS-SCCH and HS-PDSCHs is smaller or equal to said maximum transmission power and CPICH Common Pilot Channel transmitting power sum.
In order to solve the problems of the technologies described above, the present invention also provides the method for a kind of configuration high-speed downlink channel sharing institute mapping physical channel power parameter, may further comprise the steps:
(A) radio network controller obtains the maximum transmission power of physical channel mapped by high speed descending sharing channel;
(B) said radio network controller sends to the base station through signaling with said maximum transmission power.
Further; Said method also can have following characteristics: in said step (A), said radio network controller obtains said maximum transmission power and adopts following steps: (i) said radio network controller calculates the user and correctly receives the needed transmitting power of data at cell edge through physical channel mapped by high speed descending sharing channel; (ii) said radio network controller according to above-mentioned transmitting power and CPICH Common Pilot Channel transmitting power calculate this transmitting power with respect to the transmitting power deviate of CPICH Common Pilot Channel as the spendable maximum transmission power of the relevant physical channel of said high speed descending sharing channel.
Further, said method also can have following characteristics: in said step (B), said signaling is that Common transport channel is set up request message or Common transport channel reconfiguration request message.
Further, said method also can have following characteristics: after said step (B), after said signaling is received in said base station, preserve maximum transmission power wherein, and return response message to said radio network controller.
Further, said method also can have following characteristics: said physical channel is control channel HS-SCCH and the one or more high-speed physical downlink shared channel (HS-PDSCH) HS-PDSCH that is used for high speed descending sharing channel.
Further, said method also can have following characteristics: the maximum transmission power of said physical channel mapped by high speed descending sharing channel is the maximum transmission power sum of physical channel HS-PDSCH and HS-SCCH.
The invention provides a kind of relevant physical channel Poewr control method of high speed descending sharing channel under the connection mode common condition of strengthening; Make the base station can use suitable power to send when the subscriber equipment of strengthening under the connection mode common condition sends data for being in; Guarantee the correct reception of subscriber equipment, improved the capacity of system simultaneously.
Description of drawings
Fig. 1 is the Poewr control method flow chart of embodiment of the invention HS-PDSCH and HS-SCCH.
Embodiment
Below in conjunction with accompanying drawing and embodiment the present invention is described in further detail.
As shown in Figure 1, present embodiment is strengthened the physical channel Poewr control method that high speed shared channels is relevant under the connection mode common condition and may further comprise the steps:
Step 110; Radio network controller sends signaling to the base station; Carry the relevant spendable maximum transmission power of physical channel (MaxHsPower) of high speed descending sharing channel in the said signaling, i.e. the maximum transmission power sum of two physical channel HS-PDSCH and HS-SCCH;
Above-mentioned signaling can be set up request message or Common transport channel reconfiguration request message for Common transport channel.Described maximum transmission power is a relative value; For the user correctly receives the deviation of the needed transmitting power of data (minimum emissive power) and CPICH Common Pilot Channel transmitting power at cell edge through high speed descending sharing channel, said CPICH Common Pilot Channel transmitting power is pre-set by radio network controller.
Radio network controller can calculate the relevant spendable maximum transmission power of physical channel of high speed descending sharing channel according to the result who measures in advance; As adopting the computing formula calculating of the transmit power level that hereinafter is example with the path loss; The path loss of this moment is the path loss of user at cell edge, i.e. maximum circuit loss value.
Step 120; After said signaling is received in the base station; Preserve the spendable maximum transmission power of high speed descending sharing channel related physical channel wherein, and return response message (reshuffling response) like Common transport channel foundation response or Common transport channel to radio network controller;
Step 130, subscriber equipment are passed through cell update request message, wireless resource control connection request message or measurement report message to its measurement result to CPICH Common Pilot Channel of wireless network controller reporting;
Measurement result to CPICH Common Pilot Channel is: the reception signal strength signal intensity (RSCP) of signal interference ratio of CPICH Common Pilot Channel (Ec/N0) or CPICH Common Pilot Channel or path loss (pathloss).
When radio network controller is in the channel reconfiguration course, above-mentioned steps 130 and step 110 and 120 no sequencings, when radio network controller was in channel and sets up process, then step 110 and 120 carried out prior to step 130.
Step 140; When the data that need transmit subscriber equipment when radio network controller are given the base station; Spendable transmit power level when calculating HS-SCCH and HS-PDSCH and transmit these data according to the size of the measurement report values of user equipment to report, media access control protocol data unit and maximum transmission power, and in the Frame of high speed descending sharing channel, carry transmit power level and send to the base station;
Said transmit power level correctly receives the deviation of needed minimum emissive power of data and above-mentioned maximum transmission power for the present present position of user; In other words, just user's current location with respect to the deviation that correctly receives the needed transmitting power of data at cell edge.Subscriber equipment is more little from the near more needed transmitting power in base station, and the transmit power level that obtains thus is a negative value, and when subscriber equipment was in cell edge, this transmit power level then got zero.This transmit power level representes that transmitting power that physical channel can really use is smaller or equal to maximum transmission power.Described transmit power level is used for confirming total transmitting power of HS-SCCH and one or more HS-PDSCH.
Radio network controller can be confirmed transmit power level through following method; But be not limited to this: through subscriber equipment at the measurement report that inserts the CPICH Common Pilot Channel that reports radio network controller on the transmission channel at random; Such as the signal interference ratio (CPICH_Ec/N0) of CPICH Common Pilot Channel or the reception signal strength signal intensity (RSCP) or the path loss (pathloss) of CPICH Common Pilot Channel, and the size of media access control protocol data unit is confirmed the needed transmit power level of this data cell.When the signal interference ratio of CPICH Common Pilot Channel big more, perhaps when the reception signal strength signal intensity of CPICH Common Pilot Channel strong more, show that subscriber equipment is near more apart from the base station, then this moment, needed transmit power level was more little; When path loss is big more, explain that subscriber equipment is far away more apart from the base station, perhaps the size when media access control protocol data unit is big more, and then this moment, needed transmit power level was also big more.
With the path loss is example, and the computational methods of transmit power level are following:
Wherein: TPL is a transmit power level, and L is the path loss of user equipment to report, N
TBe noise power, γ is a nonorthogonal factor, and i is the interference factor of neighbor cell, and load is the current area load, E
b/ N
oBe signal interference ratio, PG is a processing gain, and said PG equals the ratio W/R of bandwidth and service rate, wherein, and W=3.84M,
Round in the expression, MacPduSize is the size of protocol Data Unit relevant in the Frame, and CpichPower is the transmitting power of CPICH Common Pilot Channel, and MaxHsPower is a maximum transmission power entrained in the signaling.
Signal interference ratio (CPICH_Ec/N0) with CPICH Common Pilot Channel is an example, and the computational methods of transmit power level are following:
TPL＝Min(CPICH_Ec/No?min-CPICH_Ec/No，0)
Wherein: CPICH_Ec/N0min is the signal interference ratio of the position common pilot signal of cell edge, and minimum value is got in Min () expression.
It is similar with the method for calculating transmit power level according to the CPICH Common Pilot Channel signal interference ratio to receive the method for signal strength signal intensity (RSCP) calculating transmit power level according to CPICH Common Pilot Channel, repeats no more here.
Step 150; When the base station sends data to subscriber equipment; Transmitting power according to maximum transmission power and transmit power level and CPICH Common Pilot Channel determines the transmitting power that physical channel (HS-SCCH and one or more HS-PDSCH) can really use, and the base station uses the transmitting power of confirming on HS-SCCH and HS-PDSCH, to send signaling and/or data respectively.
Total transmitting power of HS-SCCH and HS-PDSCH is confirmed to distribute in the base station according to the transmitting power of the transmit power level size (TPL) of pre-configured maximum transmission power of radio network controller and medium access control service data unit and CPICH Common Pilot Channel; Concrete method is following: total transmitting power sum TransmitPowerforHs=MaxHsPower+TPL+CpichPower of HS-SCCH and HS-PDSCHs; Distribute to the power division ratio of HS-SCCH and HS-PDSCHs according to HS-SCCH and HS-PDSCH institute data carried by data bit, spreading gain, significance level decision then, thereby finally confirm the transmitting power of HS-SCCH and HS-PDSCHs.
The allocation proportion of the two transmitting power is confirmed according to the ratio of HS-SCCH and HS-PDSCH spreading factor in the base station, when having many HS-PDSCH, also need consider the physical channel bar number of HS-PDSCH, can adopt following formula:
Wherein: N is a HS-PDSCH physical channel bar number; If modulation system is QPSK; Then
is if modulation system is 16QAM; Then
wherein; MachsPduSize is the protocol Data Unit size that MAC-hs will send, and 16 is the spreading factor of HS-PDSCH; 128 is the spreading factor of HS-SCCH, and α is the significance level weight, more than or equal to 1.
It is thus clear that when HS-PDSCH has only one, and weight equals at 1 o'clock, HS-SCCH is the ratio of the spreading factor of the two with the power division ratio of HS-PDSCH.
If in a Transmission Time Interval of the medium access control entity (MAC-hs) of high speed descending sharing channel, having the data block of a plurality of MAC-c/sh/m to be multiplexed in the media access control protocol data unit is sent out; Then the transmitting power of HS-SCCH is got the maximum of a plurality of data blocks; The transmitting power of HS-PDSCH is got the transmitting power sum of these a plurality of data blocks; And the transmitting power sum of HS-SCCH and HS-PDSCHs can not surpass the high speed descending sharing channel relevant spendable maximum transmission power of physical channel, promptly relative maximum transmission power and CPICH Common Pilot Channel transmitting power sum.
For a MAC-hs pdu, a Transmission Time Interval only needs a HS-SCCH, and HS-PDSCH can be one or many at a Transmission Time Interval.If HS-PDSCH is many, then can on the transmitting power basis of confirming, mean allocation arrive every physical channel.
The invention provides a kind of relevant physical channel Poewr control method of high speed shared channels under the connection mode common condition of strengthening; So that the base station can use suitable power to send for being in when the subscriber equipment of strengthening under the connection mode common condition sends data, guarantee the correct reception of subscriber equipment and the capacity of raising system.
Claims (10)
1. the Poewr control method of a physical channel mapped by high speed descending sharing channel may further comprise the steps:
(a) radio network controller is through the maximum transmission power of signaled base station physical channel mapped by high speed descending sharing channel, and said maximum transmission power is that subscriber equipment adopts said high speed descending sharing channel correctly to receive the deviate of needed transmitting power of data and CPICH Common Pilot Channel transmitting power at cell edge;
When (b) the radio network controller data that send needs to subscriber equipment send to the base station; In the Frame of high speed descending sharing channel, carry the transmit power level of using when transmitting these data, said transmit power level is the deviate that the current present position of subscriber equipment correctly receives needed transmitting power of data and said maximum transmission power;
(c) said base station is when subscriber equipment sends data; The transmitting power (CpichPower) of said maximum transmission power (MaxHsPower), transmit power level (TPL) and CPICH Common Pilot Channel that foundation obtains is in advance confirmed the transmitting power of the actual use of said physical channel, uses this transmitting power to send signaling and/or data to said user terminal; Wherein,
Total transmitting power TransmitPowerfoHs=MaxHsPower+TPL+CpichPower of downlink high-speed shared control channel (HS-SCCH) and many high-speed physical downlink shared channel (HS-PDSCH)s (HS-PDSCH).
2. the method for claim 1 is characterized in that, in said step (a), said signaling is that Common transport channel is set up request message or Common transport channel reconfiguration request message.
3. the method for claim 1; It is characterized in that; In said step (b); Said radio network controller is according to the measurement result to CPICH Common Pilot Channel of user equipment to report, the size of media access control protocol data unit and the transmit power level that said maximum transmission power calculates said physical channel, and the measurement result of said CPICH Common Pilot Channel is the signal interference ratio of CPICH Common Pilot Channel or the reception signal strength signal intensity or the path loss of CPICH Common Pilot Channel; When the signal interference ratio of said CPICH Common Pilot Channel big more, perhaps when the reception signal strength signal intensity of CPICH Common Pilot Channel strong more, then this moment, needed transmit power level was more little; When path loss big more, perhaps when the size of media access control protocol data unit big more, then this moment, needed transmit power level was also big more.
4. method as claimed in claim 3 is characterized in that,
Utilize path loss to calculate said transmit power level and adopt following formula:
Wherein, TPL is a transmit power level, and L is the path loss of user equipment to report, N
TBe noise power, γ is a nonorthogonal factor, and i is the interference factor of neighbor cell, and load is the current area load, E
b/ N
oBe signal interference ratio, PG is a processing gain, and said PG equals the ratio W/R of bandwidth and service rate, wherein, and W=3.84M,
Round in the expression, MacPduSize is the size of protocol Data Unit relevant in the Frame, and CpichPower is the transmitting power of CPICH Common Pilot Channel, and MaxHsPower is a maximum transmission power entrained in the signaling;
Utilize the signal interference ratio of CPICH Common Pilot Channel to calculate said transmit power level and adopt following formula:
TPL＝Min(CPICH_Ec/Nomin-CPICH_Ec/No，0)
Wherein, CPICH_Ec/No is the signal interference ratio of CPICH Common Pilot Channel, and CPICH_Ec/Nomin is the signal interference ratio of the position common pilot signal of cell edge.
5. method as claimed in claim 3 is characterized in that, subscriber equipment reports its measurement result to CPICH Common Pilot Channel through cell update request message, wireless resource control connection request message or measurement report message to radio network controller.
6. the method for claim 1 is characterized in that, in said step (c), the actual transmitting power of using of said physical channel is CPICH Common Pilot Channel transmitting power and said maximum transmission power and said transmit power level sum.
7. the method for claim 1 is characterized in that, said physical channel is control channel HS-SCCH and the one or more high-speed physical downlink shared channel (HS-PDSCH) HS-PDSCH that is used for high speed descending sharing channel.
8. method as claimed in claim 7; It is characterized in that; In said step (c); Confirm HS-SCCH channel and HS-PDSCH channel transmitting power according to the transmitting power of the actual use of said physical channel and the power division ratio of HS-SCCH and HS-PDSCH, said power division ratio is that the two the product of ratio and weight of spreading factor is divided by the bar number of HS-PDSCH physical channel.
9. method as claimed in claim 8 is characterized in that, when HS-PDSCH has many, gives every HS-PDSCH with HS-PDSCH channel transmitting power mean allocation.
10. the method for claim 1; It is characterized in that; In said step (c); If in a Transmission Time Interval, having a plurality of data blocks to be multiplexed in the media access control protocol data unit is sent out; Then the HS-SCCH channel transmitting power is got the maximum of a plurality of data block transmitting powers, and the HS-PDSCH channel transmitting power is got the transmitting power sum of these a plurality of data blocks, and the transmitting power sum of HS-SCCH and many HS-PDSCH is smaller or equal to said maximum transmission power and CPICH Common Pilot Channel transmitting power sum.
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| CN101959292B (en) * | 2009-07-20 | 2013-12-18 | 华为技术有限公司 | Method, equipment and system for saving energy for base station |
| CN104429136A (en) * | 2012-08-03 | 2015-03-18 | 富士通株式会社 | Method for controlling power of terminal, base station, terminal, system, machine readable program and storage medium |
| CN104349349B (en) * | 2013-07-25 | 2018-12-18 | 中国移动通信集团公司 | A kind of determination method, system and the equipment of cell parameter |
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| CN1420696A (en) * | 2001-11-16 | 2003-05-28 | Lg电子株式会社 | Method for transmisson of HS-SCCH power control information in mobile communication system |
| CN1462124A (en) * | 2002-05-11 | 2003-12-17 | 三星电子株式会社 | Method for determining high-speed physical down share channel power offset and its signalling method |
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| CN1420696A (en) * | 2001-11-16 | 2003-05-28 | Lg电子株式会社 | Method for transmisson of HS-SCCH power control information in mobile communication system |
| CN1462124A (en) * | 2002-05-11 | 2003-12-17 | 三星电子株式会社 | Method for determining high-speed physical down share channel power offset and its signalling method |
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