CN102480778A - Method and system for setting forward and reverse link gain through physical-layer relay - Google Patents
Method and system for setting forward and reverse link gain through physical-layer relay Download PDFInfo
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- CN102480778A CN102480778A CN2010105616083A CN201010561608A CN102480778A CN 102480778 A CN102480778 A CN 102480778A CN 2010105616083 A CN2010105616083 A CN 2010105616083A CN 201010561608 A CN201010561608 A CN 201010561608A CN 102480778 A CN102480778 A CN 102480778A
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Abstract
The invention provides a method and a system for setting forward and reverse link gain through a physical-layer relay, belonging to the technical field of wireless communication. The method comprises the following steps of: setting the maximum power value of a broadcast channel; demodulating the broadcast channel and extracting a power value carried by the broadcast channel by the physical-layer relay; measuring the power value of a downlink pilot signal by the physical-layer relay; and dividing either of the maximum power value of the broadcast channel and the power value carried by the broadcast channel by the power value of the downlink pilot signal to obtain a forward link gain value, wherein the reverse link gain is equal to the forward link gain according to the symmetry of the uplink and downlink transmission loss. The system comprises a broadcast channel power acquisition module, a broadcast channel maximum power setting module, a downlink pilot signal power measuring module, a forward link gain calculation module and a forward and reverse link gain symmetric module. The method and system can optimize the power distribution of the whole wireless network including the physical-layer relay and reduce system interference.
Description
Technical field
The invention belongs to wireless communication technology field, being specifically related to physical layer repeater is the setting of the forward direction and the reverse link gain of enhancement mode repeater.
Background technology
In wireless communication system, travelling carriage or terminal receive from signal of base station, and the base station is supported in contiguous or around communication link or service in the specific geographic area of said base station.Because geographical with economic restriction, in some zones in the expectation overlay area, the network of base station does not provide enough communication services.In the overlay area these " gap " and " cavity " can be filled through using repeater.Repeater can provide communication service to covering the cavity, and the cavity is not before by base station services, and through position of shifting the overlay area or the shape that changes the overlay area, repeater can also increase the overlay area of base station.Therefore, repeater has served as indispensable task in the process of radio communication is provided.
Physical layer repeater forward direction and reverse link gain setting are rings very important in the system, and purpose mainly is for repeater is protected, the control power output, and reduce interference to network.The function that present technique realized is exactly to control output level on the one hand to guarantee that power discharging device can not be operated under the over-power condition; The power output of controlling relay station on the other hand is in covering allowed band, and the coverage distance requirement in the time of can either satisfying the network planning can not produce strong output signal again adjacent base station is caused interference.
In the wireless communication system of two-forty like HSDPA, LTE, systems such as WiMAX give the user with channel allocation dynamically according to certain DCA algorithm, the number of users in different subframes maybe acute variation, causes the power difference of each sub-frame very big.Traditional gain setting method calculates the power of each subframe; And relatively come calculated gains with reference power value; This method is moved the power of different subframes to equal values, but the pilot power of different subframes but changes along with the difference of number of users, causes each subframe of coverage of physical layer repeater all changing; In some cases, can cause interference to whole network.Our invention can overcome this problem, makes that the pilot transmit power of physical layer repeater in each subframe is constant.
Summary of the invention
The invention provides a kind of method and system of in physical layer repeater, setting forward link and reverse link gain value, this method and system can be optimized and comprises the power division of physical layer repeater at interior whole wireless network, the reduction system interference.
A kind ofly through physical layer repeater method preceding, reverse link gain is set, this method comprises the steps:
Step 1 is set the maximum power value of broadcast channel as required;
Step 2, physical layer repeater is carried out demodulation to broadcast channel, and extracts the performance number that broadcast channel carries;
Step 3, physical layer repeater is measured the performance number of down-bound pilot frequency signal;
Step 4, the two one of which of performance number that broadcast channel in the maximum power value of broadcast channel in the above-mentioned steps 1 and the step 2 is carried calculates with the performance number of down-bound pilot frequency signal in the above-mentioned steps 3;
Step 5, the result of calculation of above-mentioned steps 4 is the forward link gain size;
Step 6, according to the symmetry of uplink downlink loss, reverse link gain equates with forward link gain.
Further, describedly a kind ofly method preceding, reverse link gain is set, also has following technical characterictic through physical layer repeater:
In step 1, the maximum power of broadcast channel is set through broadcast channel maximum power setting module.
In step 2, through the channel of repeater demodulation module broadcast channel is carried out demodulation, and, from the information that demodulation is come out, gather the performance number size of broadcast channel through the broadcast channel power acquisition module.
In step 3, physical layer repeater is measured the performance number size of down-bound pilot frequency signal through the down-bound pilot frequency signal power measurement module.
In step 4, be through the forward link gain computing module, the two one of which of performance number that the maximum power value and the broadcast channel of broadcast channel carried divided by the performance number of down-bound pilot frequency signal, thereby draws the size of forward link gain value.
In step 6, be that the forward link gain value according to calculating in the step 5 is symmetric to reverse link, thereby confirms the reverse link gain value that size is the same with the forward link gain value through forward direction, reverse link gain symmetry module.
A kind ofly through physical layer repeater system preceding, reverse link gain is set, it includes physical layer repeater, and this system also includes:
The channel of repeater demodulation module, it is the modular structure that is used for broadcast channel is carried out demodulation;
The broadcast channel power acquisition module, it is to be used for modular structure that the power information of above-mentioned demodulating information broadcast channel is gathered;
Broadcast channel maximum power setting module, it is the modular structure that is used to set the broadcast channel maximum power value;
The down-bound pilot frequency signal power measurement module, it is the modular structure that is used to measure the down-bound pilot frequency signal watt level;
The forward link gain computing module, it is to be used for above-mentioned each performance number is calculated, and draws the modular structure of forward link gain;
Forward direction, reverse link gain symmetry module, it is to be used for the yield value that calculates according to the forward link gain computing module, is symmetric to reverse link, thereby confirms the reverse link gain value that size is the same with the forward link gain value.
Advantage of the present invention:
Of the present inventionly thisly method preceding, reverse link gain is set through physical layer repeater; Can be through simple broadcast channel power collection; The down-bound pilot frequency signal power measurement just can be determined preceding, reverse link gain very soon, has avoided instability preceding, reverse link gain like this; This method and system can be optimized and comprises the power division of physical layer repeater at interior whole wireless network simultaneously, reduces system interference.
Description of drawings
Fig. 1 is the flow chart that the method for preceding, reverse link gain is set through physical layer repeater of the present invention.
Embodiment
Accompanying drawing in following reference, a kind ofly through physical layer repeater method and system preceding, reverse link gain is set to of the present invention, does more detailed introduction:
As shown in Figure 1, through physical layer repeater the flow chart of the method for preceding, reverse link gain is set for of the present invention, below in conjunction with concrete system and implementation method, the present invention is done whole detailed introduction.
A kind ofly through physical layer repeater method preceding, reverse link gain is set, this method comprises the steps:
Step 1 is set the maximum power value of broadcast channel as required; Through broadcast channel maximum power setting module the maximum power of broadcast channel is set.Our maximum transmission power that the physical layer trunking station is allowed is as the maximum power of setting generally speaking.
Step 2, physical layer repeater is carried out demodulation to broadcast channel, and extracts the performance number that broadcast channel carries.Specifically be broadcast channel to be carried out demodulation, and, from the information that demodulation is come out, gather the performance number size of broadcast channel through the broadcast channel power acquisition module through the channel of repeater demodulation module.
For example in WCDMA access system (WCDMA); Primary Common Pilot Channel that the physical layer repeater demodulation is descending and Primary Common Control Physical Channel; Measure the performance number of Primary Common Pilot Channel, and to obtain this channel from Primary Common Control Physical Channel be described broadcast channel power value; In TD-SCDMA system (TD-SCDMA); The training sequence code and the Primary Common Control Physical Channel of descending each time slot of physical layer repeater demodulation; Measure the performance number of training sequence code, and to obtain this channel from Primary Common Control Physical Channel be the performance number of described broadcast channel; At long evolving system (LTE) and global intercommunication microwave system (WiMax) also is similarly original situation.
Step 3 through the down-bound pilot frequency signal power measurement module in the physical layer repeater, is measured the performance number size of down-bound pilot frequency signal.
All be to carry out synchronously as this step 1 with step 2.Concrete is physical layer repeater searching downlink synchronizing signal, accomplish between physical layer repeater and the base station synchronously.Synchronizing function of this part and terminal are identical; According to concrete wireless communication system is WCDMA, TD-SCDMA, and LTE, or WiMax etc., according to the frame structure of different system, extract the leading of downlink broadcast, training sequence and pilot channel/frequency pilot sign.According to the definition of pilot frequency sequence, these pilot tones are carried out power measurement; According to the definition of the broadcast channel of different system, the demodulation coding broadcast channel obtains the system broadcasts parameter, comprises the transmitting power of base station, the transmitting power of pilot tone etc.
Step 4, the two one of which of performance number that broadcast channel in the maximum power value of broadcast channel in the above-mentioned steps 1 and the step 2 is carried calculates with the performance number of down-bound pilot frequency signal in the above-mentioned steps 3.Concrete is through the forward link gain computing module, and the two one of which of performance number that the maximum power value and the broadcast channel of broadcast channel carried divided by the performance number of down-bound pilot frequency signal, thereby draws the size of forward link gain value.
Step 5, the result of calculation of above-mentioned steps 4 is the forward link gain size;
Step 6, according to the symmetry of uplink downlink loss, reverse link gain equates with forward link gain.Be that the forward link gain value according to calculating in the step 5 is symmetric to reverse link, thereby confirms the reverse link gain value that size is the same with the forward link gain value through forward direction, reverse link gain symmetry module.Calculate the yield value of forward link accumulative total, and the yield value that this is total is assigned to the amplifiers at different levels of reverse link, the accumulative total yield value of reverse link is equated with forward link.
More than be the description of this invention and non-limiting, based on other execution mode of inventive concept, all among protection scope of the present invention.
Claims (7)
1. one kind is provided with method preceding, reverse link gain through physical layer repeater, it is characterized in that this method comprises the steps:
Step 1 is set the maximum power value of broadcast channel as required;
Step 2, physical layer repeater is carried out demodulation to broadcast channel, and extracts the performance number that broadcast channel carries;
Step 3, physical layer repeater is measured the performance number of down-bound pilot frequency signal;
Step 4, the two one of which of performance number that broadcast channel in the maximum power value of broadcast channel in the above-mentioned steps 1 and the step 2 is carried calculates with the performance number of down-bound pilot frequency signal in the above-mentioned steps 3;
Step 5, the result of calculation of above-mentioned steps 4 is the forward link gain size;
Step 6, according to the symmetry of uplink downlink loss, reverse link gain equates with forward link gain.
2. according to claim 1ly a kind ofly method preceding, reverse link gain is set, it is characterized in that, in step 1, the maximum power of broadcast channel is set through broadcast channel maximum power setting module through physical layer repeater.
3. according to claim 1ly a kind ofly method preceding, reverse link gain is set through physical layer repeater; It is characterized in that; In step 2; Through the channel of repeater demodulation module broadcast channel is carried out demodulation, and, from the information that demodulation is come out, gather the performance number size of broadcast channel through the broadcast channel power acquisition module.
4. according to claim 1ly a kind ofly method preceding, reverse link gain is set through physical layer repeater; It is characterized in that; In step 3, physical layer repeater is measured the performance number size of down-bound pilot frequency signal through the down-bound pilot frequency signal power measurement module.
5. according to claim 1ly a kind ofly method preceding, reverse link gain is set through physical layer repeater; It is characterized in that; In step 4, be through the forward link gain computing module, the two one of which of performance number that the maximum power value and the broadcast channel of broadcast channel carried; Divided by the performance number of down-bound pilot frequency signal, thereby draw the size of forward link gain value.
6. according to claim 1ly a kind ofly method preceding, reverse link gain is set through physical layer repeater; It is characterized in that; In step 6, be through forward direction, reverse link gain symmetry module, according to the forward link gain value that calculates in the step 5; Be symmetric to reverse link, thereby confirm the reverse link gain value that size is the same with the forward link gain value.
7. one kind is provided with system preceding, reverse link gain through physical layer repeater, and it includes physical layer repeater, it is characterized in that, this system also includes:
The channel of repeater demodulation module, it is the modular structure that is used for broadcast channel is carried out demodulation;
The broadcast channel power acquisition module, it is to be used for modular structure that the power information of above-mentioned demodulating information broadcast channel is gathered;
Broadcast channel maximum power setting module, it is the modular structure that is used to set the broadcast channel maximum power value;
The down-bound pilot frequency signal power measurement module, it is the modular structure that is used to measure the down-bound pilot frequency signal watt level;
The forward link gain computing module, it is to be used for above-mentioned each performance number is calculated, and draws the modular structure of forward link gain;
Forward direction, reverse link gain symmetry module, it is to be used for the yield value that calculates according to the forward link gain computing module, is symmetric to reverse link, thereby confirms the reverse link gain value that size is the same with the forward link gain value.
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| CN2010105616083A CN102480778A (en) | 2010-11-25 | 2010-11-25 | Method and system for setting forward and reverse link gain through physical-layer relay |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105992330A (en) * | 2015-01-28 | 2016-10-05 | 中国移动通信集团公司 | Gain adjustment method and device |
| CN107484237A (en) * | 2017-09-27 | 2017-12-15 | 四川省大见通信技术有限公司 | A kind of unbalanced Adaptable System of uplink downlink and its method |
| CN108390711A (en) * | 2018-05-26 | 2018-08-10 | 四川省大见通信技术有限公司 | Computational methods and device for gain in digital junction equipment |
-
2010
- 2010-11-25 CN CN2010105616083A patent/CN102480778A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105992330A (en) * | 2015-01-28 | 2016-10-05 | 中国移动通信集团公司 | Gain adjustment method and device |
| CN105992330B (en) * | 2015-01-28 | 2019-10-18 | 中国移动通信集团公司 | A kind of gain adjusting method and device |
| CN107484237A (en) * | 2017-09-27 | 2017-12-15 | 四川省大见通信技术有限公司 | A kind of unbalanced Adaptable System of uplink downlink and its method |
| CN107484237B (en) * | 2017-09-27 | 2024-03-15 | 北联技术股份有限公司 | Self-adaptive system and method for unbalance of uplink and downlink |
| CN108390711A (en) * | 2018-05-26 | 2018-08-10 | 四川省大见通信技术有限公司 | Computational methods and device for gain in digital junction equipment |
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Application publication date: 20120530 |