CN101119145B - Auxiliary frequency point opened loop power control method in time division synchronous CDMA system - Google Patents
Auxiliary frequency point opened loop power control method in time division synchronous CDMA system Download PDFInfo
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Abstract
The invention discloses an open-loop power control method of auxiliary frequency point in the TD-SCDMA system. The method including the steps as follows: acquiring the receiving signal code power on the PCCPCH of main frequency point; calculating the path loss of down-link channel of main frequency point; acquiring all the interference signal code power of auxiliary and reporting to the wireless network controller RNC, ensuring the expecting receiving signal code power of every auxiliary frequency point; considering the path loss of down-link channel of main frequency point is equal with the path loss of the auxiliary frequency point to ensure the primary launching power of every frequency point in the specialized physical channel with the help of the interference signal code power and the expecting receiving signal code power. The invention can realize the open-loop power control of the auxiliary frequency point in the N frequency points TD-SCDMA system.
Description
Technical field
The present invention relates to the open Loop Power control technology in the mobile communication system, the auxiliary frequency point opened loop power control method in particularly a kind of time-division-synchronization code multi-address division system.
Background technology
In Time Division-Synchronous Code Division Multiple Access (TD-SCDMA) system, can successful access network in order to guarantee the user, and improve stability of network, and need the control open loop power, promptly need to determine the Initial Trans of up-downgoing physical channel.Because if Initial Trans is too small, then reciprocity physical layer can't receive data effectively, cause the user can't access network; If Initial Trans is excessive, then will cause stronger interference to other user, influence stability of network.
In the TD-SCDMA system, in order to enlarge power system capacity, introduced N frequency technology, a dominant frequency point and a plurality of auxilliary frequency are adopted in each sub-district, and the dominant frequency point can carry public physic channel and DPCH, and auxilliary frequency can only carry DPCH.
Open-loop power control method of the prior art is all at single-frequency point, it is generally acknowledged dominant frequency point open Loop Power control under the N frequency environment can adopt with single-frequency point environment under identical method, this method comprises: measure received signal code power on the dominant frequency point Primary Common Control Physical Channel (PCCPCH) and dominant frequency and put Interference Signal Code Power on each time slot; Calculate the path loss of dominant frequency point down channel, utilize dominant frequency to put the Interference Signal Code Power on each time slot and the default signal interference ratio of corresponding service, calculate the expectation received signal code power of user terminal (UE) or base station (NodeB), and then obtain the Initial Trans on the dominant frequency point physical channel.But control does not still have disclosed method for the auxiliary frequency point opened loop power under the N frequency environment.
Summary of the invention
In view of this, main purpose of the present invention is to provide the auxiliary frequency point opened loop power control method in a kind of TD-SCDMA system, realizes the open Loop Power control on the auxilliary frequency of N frequency TD-SCDMA system.
In order to realize the foregoing invention purpose, the invention provides the auxiliary frequency point opened loop power control method in a kind of TD-SCDMA system, this method comprises: obtain the received signal code power on the dominant frequency point Primary Common Control Physical Channel PCCPCH, calculate the path loss of dominant frequency point down channel, this method is further comprising the steps of:
A, obtain and report the Interference Signal Code Power of all auxilliary frequencies, determine the expectation received signal code power of each auxilliary frequency to radio network controller (RNC);
B, the path loss that dominant frequency is put down channel are approximately the path loss of auxilliary frequency, and Interference Signal Code Power that integrating step A obtains and expectation received signal code power are determined the Initial Trans on each auxilliary frequency DPCH.
The described received signal code power that obtains on the dominant frequency point PCCPCH is: UE measures and obtains the received signal code power on the dominant frequency point PCCPCH;
The path loss of described definite dominant frequency point down channel is: according to received signal code power on the dominant frequency point PCCPCH and transmitted power, determine the path loss of dominant frequency point down channel.
The described Interference Signal Code Power that obtains all auxilliary frequencies of steps A is: obtain the Interference Signal Code Power on all each time slots of auxilliary frequency;
The expectation received signal code power of described definite each auxilliary frequency is: the expectation received signal code power of determining each auxilliary each time slot of frequency.
Step B is described to determine that the Initial Trans of each auxilliary frequency is: determine the Initial Trans on the DPCH of each auxilliary each time slot of frequency.
Steps A is described determines that the expectation received signal code power of each auxilliary frequency is: RNC calculates the expectation received signal code power of the corresponding time slot of each auxilliary frequency according to the Interference Signal Code Power of each auxilliary each time slot of frequency and the default signal interference ratio of corresponding service.
The expectation received signal code power of the corresponding time slot of described each auxilliary frequency equal on the corresponding time slot of each auxilliary frequency Interference Signal Code Power and the default signal interference ratio of corresponding service with.
The Initial Trans of described each auxilliary each time slot of frequency equals: the expectation received signal code power of corresponding time slot and the path loss sum that should assist frequency.
Behind the described received signal code power that obtains on the dominant frequency point PCCPCH, further comprise: the received signal code power on the dominant frequency point PCCPCH that obtains is reported RNC;
The path loss of described calculating dominant frequency point down channel is: RNC calculates the path loss of dominant frequency point down channel according to transmitted power on the dominant frequency point PCCPCH and received signal code power;
Described steps A is: UE obtains and reports the Interference Signal Code Power of all auxilliary frequencies to radio network controller (RNC), and RNC determines the expectation received signal code power of the corresponding time slot UE of each auxilliary frequency;
Described step B is: the path loss that RNC puts down channel with dominant frequency is approximately the path loss of auxilliary frequency, calculates Initial Trans on the corresponding time slot downward special physical channel of each auxilliary frequency in conjunction with the expectation received signal code power of the corresponding time slot UE of each auxilliary frequency.
Initial Trans on the corresponding time slot downward special physical channel of described each auxilliary frequency equals: the expectation received signal code power of corresponding time slot UE and the path loss sum that should assist frequency.
The path loss of described calculating dominant frequency point down channel is: UE calculates the path loss of dominant frequency point down channel according to transmitted power on the dominant frequency point PCCPCH and received signal code power;
Described steps A is: NodeB obtains and reports the Interference Signal Code Power of all auxilliary frequencies to radio network controller (RNC), and RNC determines the expectation received signal code power of the corresponding time slot NodeB of each auxilliary frequency, and the result that will determine sends to UE;
Described step B is: the path loss that UE puts down channel with dominant frequency is approximately the path loss of assisting frequency, in conjunction with the expectation received signal code power of the corresponding time slot NodeB of each auxilliary frequency, calculate the Initial Trans on the corresponding time slot uplink special physical channel of each auxilliary frequency.
Initial Trans on the corresponding time slot uplink special physical channel of described each auxilliary frequency equals: the expectation received signal code power of corresponding time slot NodeB and the path loss sum that should assist frequency.
Auxiliary frequency point opened loop power control method in the TD-SCDMA of the present invention system, measure and report the Interference Signal Code Power of all auxilliary each time slots of frequency to radio network controller (RNC) by user terminal (UE) or base station (NodeB), and the approximation of auxilliary frequency of utilization and dominant frequency point path loss, with the path loss of dominant frequency point path loss as auxilliary frequency, calculate the Initial Trans on the auxilliary frequency up-downgoing DPCH, thereby realized the open Loop Power control on the auxilliary frequency in the N frequency TD-SCDMA system.
Description of drawings
Fig. 1 is the schematic flow sheet of the auxiliary frequency point opened loop power control method in the TD-SCDMA of the present invention system;
Fig. 2 is used for the schematic flow sheet of auxilliary frequency down channel open Loop Power control for method shown in Figure 1;
Fig. 3 is used for the schematic flow sheet of auxilliary frequency up channel open Loop Power control for method shown in Figure 1.
Embodiment
For making purpose of the present invention, technical scheme and beneficial effect clearer,, the present invention is described in further detail below in conjunction with embodiment and accompanying drawing.
Auxiliary frequency point opened loop power control method in the TD-SCDMA provided by the invention system, obtain received signal code power on the dominant frequency point Primary Common Control Physical Channel (PCCPCH) by measurement, and the Interference Signal Code Power on each time slot of auxilliary frequency, and the Interference Signal Code Power that will assist on each time slot of frequency reports RNC; Determine the expectation received signal code power of each auxilliary frequency; Calculate the path loss of dominant frequency point down channel, and it is approximately the path loss of auxilliary frequency; Last according to the Initial Trans on the path loss on the auxilliary frequency, the definite auxilliary frequency DPCH of expectation received signal code power.
Fig. 1 is the schematic flow sheet of the auxiliary frequency point opened loop power control method in the TD-SCDMA of the present invention system, and as shown in Figure 1, the flow process of this auxiliary frequency point opened loop power control method may further comprise the steps:
Here, the Interference Signal Code Power on the auxilliary frequency of each that obtain comprises: the Interference Signal Code Power of each time slot.
Here, the expectation received signal code power of each auxilliary frequency comprises: the expectation received signal code power of each auxilliary each time slot of frequency.The expectation received signal code power of each auxilliary frequency can be divided into two kinds: the expectation received signal code power of the expectation received signal code power of the UE of corresponding down channel and the NodeB of corresponding up channel.
Concrete definite process is: RNC determines the expectation received signal code power of each time slot of each auxilliary frequency according to each the slot interfering signal of time sign indicating number power that receives and the default signal interference ratio of corresponding service.Usually, the expectation received signal code power of the corresponding time slot of each auxilliary frequency equal on the corresponding time slot of each auxilliary frequency Interference Signal Code Power and the default signal interference ratio of corresponding service with.
Described corresponding service can be adaptive multi-rate (AMR) business, bag professional (PS) or Circuit Service (CS) etc.
Here, the path loss of dominant frequency point down channel is determined by transmitted power on the dominant frequency point PCCPCH and received signal code power.
Usually, the Initial Trans of each auxilliary each time slot of frequency equals the expectation received signal code power and the path loss sum that should assist frequency of corresponding time slot.
The sequencings that above-mentioned steps 102 and 103 is not carried out both can first execution in step 102, also can first execution in step 103.
The auxiliary frequency point opened loop power control of TD-SCDMA system can be divided into up channel and two kinds of situations of down channel.Auxiliary frequency point opened loop power control method in the TD-SCDMA provided by the invention system both can be used for the open Loop Power control of auxilliary frequency up channel, also can be used for the open Loop Power control of auxilliary frequency down channel.
Referring to Fig. 2, Fig. 2 is used for the schematic flow sheet of auxilliary frequency down channel open Loop Power control for method shown in Figure 1.As shown in Figure 2, this auxilliary frequency down channel open Loop Power control flow process may further comprise the steps:
L
PCCPCH＝P
PCCPCH-RSCP
PCCPCH (1)
P
des＝(C/I)
des+ISCP (2)
P
DPCH＝L
PCCPCH+P
des(3)
Referring to Fig. 3, Fig. 3 is used for the schematic flow sheet of auxilliary frequency up channel open Loop Power control for method shown in Figure 1.As shown in Figure 3, this auxilliary frequency up channel open Loop Power control flow process may further comprise the steps:
PRX
DPCHdes＝(C/I)
des+ISCP (4)
P
DPCH＝L
PCCPCH+PRX
DPCHdes (5)
Realize that the condition that the auxiliary frequency point opened loop power control method in the TD-SCDMA provided by the invention system need satisfy comprises: measure when the UE needs are supported the Interference Signal Code Power of the received signal code power on the main carrier frequency PCCPCH channel and all frequency descending time slots and report; Measure when NodeB need support the Interference Signal Code Power of all frequency ascending time slots and report.
Auxiliary frequency point opened loop power control method in the TD-SCDMA provided by the invention system to the requirement of protocol modification is: support all down channels of a plurality of frequencies and the Interference Signal Code Power of each time slot of up channel to report in the measurement reporting message of UE and NodeB simultaneously.
Claims (10)
1. the auxiliary frequency point opened loop power control method in the time-division-synchronization code multi-address division system, obtain the received signal code power on the dominant frequency point Primary Common Control Physical Channel PCCPCH, calculate the path loss of dominant frequency point down channel, it is characterized in that this method is further comprising the steps of:
A, obtain and report the Interference Signal Code Power of all auxilliary frequencies, determine the expectation received signal code power of each auxilliary frequency to radio network controller (RNC);
B, the path loss that dominant frequency is put down channel are approximately the path loss of auxilliary frequency, and Interference Signal Code Power that integrating step A obtains and expectation received signal code power are determined the Initial Trans on each auxilliary frequency DPCH.
2. the method for claim 1 is characterized in that, the described received signal code power that obtains on the dominant frequency point PCCPCH is: UE measures and obtains the received signal code power on the dominant frequency point PCCPCH;
The path loss of described definite dominant frequency point down channel is: according to received signal code power on the dominant frequency point PCCPCH and transmitted power, determine the path loss of dominant frequency point down channel.
3. method as claimed in claim 1 or 2 is characterized in that, the described Interference Signal Code Power that obtains all auxilliary frequencies of steps A is: obtain the Interference Signal Code Power on all each time slots of auxilliary frequency;
The expectation received signal code power of described definite each auxilliary frequency is: the expectation received signal code power of determining each auxilliary each time slot of frequency.
Step B is described to determine that the Initial Trans of each auxilliary frequency is: determine the Initial Trans on the DPCH of each auxilliary each time slot of frequency.
4. method as claimed in claim 3, it is characterized in that, steps A is described determines that the expectation received signal code power of each auxilliary frequency is: RNC calculates the expectation received signal code power of the corresponding time slot of each auxilliary frequency according to the Interference Signal Code Power of each auxilliary each time slot of frequency and the default signal interference ratio of corresponding service.
5. method as claimed in claim 4 is characterized in that, the expectation received signal code power of the corresponding time slot of described each auxilliary frequency equal on the corresponding time slot of each auxilliary frequency Interference Signal Code Power and the default signal interference ratio of corresponding service with.
6. as claim 1,2,4 or 5 described methods, it is characterized in that the Initial Trans of described each auxilliary each time slot of frequency equals: the expectation received signal code power of corresponding time slot and the path loss sum that should assist frequency.
7. as claim 1,2,4 or 5 described methods, it is characterized in that, behind the described received signal code power that obtains on the dominant frequency point PCCPCH, further comprise: the received signal code power on the dominant frequency point PCCPCH that obtains is reported RNC;
The path loss of described calculating dominant frequency point down channel is: RNC calculates the path loss of dominant frequency point down channel according to transmitted power on the dominant frequency point PCCPCH and received signal code power;
Described steps A is: UE obtains and reports the Interference Signal Code Power of all auxilliary frequencies to radio network controller (RNC), and RNC determines the expectation received signal code power of the corresponding time slot UE of each auxilliary frequency;
Described step B is: the path loss that RNC puts down channel with dominant frequency is approximately the path loss of auxilliary frequency, calculates Initial Trans on the corresponding time slot downward special physical channel of each auxilliary frequency in conjunction with the expectation received signal code power of the corresponding time slot UE of each auxilliary frequency.
8. method as claimed in claim 7 is characterized in that, the Initial Trans on the corresponding time slot downward special physical channel of described each auxilliary frequency equals: the expectation received signal code power of corresponding time slot UE and the path loss sum that should assist frequency.
9. as claim 1,2,4 or 5 described methods, it is characterized in that the path loss of described calculating dominant frequency point down channel is: UE calculates the path loss of dominant frequency point down channel according to transmitted power on the dominant frequency point PCCPCH and received signal code power;
Described steps A is: NodeB obtains and reports the Interference Signal Code Power of all auxilliary frequencies to radio network controller (RNC), and RNC determines the expectation received signal code power of the corresponding time slot NodeB of each auxilliary frequency, and the result that will determine sends to UE;
Described step B is: the path loss that UE puts down channel with dominant frequency is approximately the path loss of assisting frequency, in conjunction with the expectation received signal code power of the corresponding time slot NodeB of each auxilliary frequency, calculate the Initial Trans on the corresponding time slot uplink special physical channel of each auxilliary frequency.
10. method as claimed in claim 9 is characterized in that, the Initial Trans on the corresponding time slot uplink special physical channel of described each auxilliary frequency equals: the expectation received signal code power of corresponding time slot NodeB and the path loss sum that should assist frequency.
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| CN101835253B (en) * | 2009-03-12 | 2013-08-07 | 中兴通讯股份有限公司 | UE (User Equipment) side uplink power control device and method in TD-SCDMA (Time Division-Synchronous Code Division Multiple Access) system |
| CN102209375A (en) * | 2010-03-31 | 2011-10-05 | 爱立信电话股份有限公司 | Method for setting downlink channel power and equipment implementing same |
| CN102665242B (en) * | 2012-05-28 | 2014-07-09 | 鼎桥通信技术有限公司 | Method and equipment for selecting AMR (adaptive multi-rate) speech coding rate during initial access |
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| CN1545217A (en) * | 1999-03-22 | 2004-11-10 | �����ּ�����˾ | Combined closed loop/open loop power control in a time division duplex communication system |
| WO2005064821A1 (en) * | 2003-12-29 | 2005-07-14 | Samsung Electronics Co., Ltd. | Method and apparatus for adaptive open-loop power control in mobile communication system using tdd |
| CN1719935A (en) * | 2004-07-09 | 2006-01-11 | 中兴通讯股份有限公司 | Auxiliary carrier signal quality estimating and carrier selecting method for TD-SCDMA system |
| CN1750700A (en) * | 2004-09-14 | 2006-03-22 | 中兴通讯股份有限公司 | Mobile terminal measuring control method in multiple carrier frequency small region and multiple small region |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1545217A (en) * | 1999-03-22 | 2004-11-10 | �����ּ�����˾ | Combined closed loop/open loop power control in a time division duplex communication system |
| WO2005064821A1 (en) * | 2003-12-29 | 2005-07-14 | Samsung Electronics Co., Ltd. | Method and apparatus for adaptive open-loop power control in mobile communication system using tdd |
| CN1719935A (en) * | 2004-07-09 | 2006-01-11 | 中兴通讯股份有限公司 | Auxiliary carrier signal quality estimating and carrier selecting method for TD-SCDMA system |
| CN1750700A (en) * | 2004-09-14 | 2006-03-22 | 中兴通讯股份有限公司 | Mobile terminal measuring control method in multiple carrier frequency small region and multiple small region |
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