CN101867935A - Method and equipment for broadcast channel covering optimization - Google Patents
Method and equipment for broadcast channel covering optimization Download PDFInfo
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- CN101867935A CN101867935A CN200910082284A CN200910082284A CN101867935A CN 101867935 A CN101867935 A CN 101867935A CN 200910082284 A CN200910082284 A CN 200910082284A CN 200910082284 A CN200910082284 A CN 200910082284A CN 101867935 A CN101867935 A CN 101867935A
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Abstract
The invention provides a broadcast channel covering optimization method which comprises the following steps that: network side equipment determines the sending power of a broadcast channel according to the power of a downlink reference signal RS channel; and the network side equipment sends a downlink signal to a terminal, and the sum of the power of the RS channel, the covering power of the broadcast channel and the power of other downlink channels does not exceed the total power of the rated downlink signal sending. The technical scheme solves the broadcast channel covering optimization problem of a system so as to reduce manual participation and reduce the operation cost of a network in a network planning and optimization process. In addition, the technical scheme has small changes to the traditional systems, does not affect the compatibility of the system, and the realization is simple and high-efficiency.
Description
Technical field
The present invention relates to moving communicating field, particularly, the present invention relates to a kind of broadcast channel covering optimization method and equipment.
Background technology
Present mobile communication has stepped into 3G (Third Generation) Moblie, and the extensive use of mobile communication new technology makes the mobile data transmission rate more and more faster, and function is more and more, and business is more rich and varied.For user terminal, have only the network quality of lifting and strengthen user satisfaction, could improve competitive strength.And network quality is the key of enhancing competitiveness and the factor of prerequisite, is exactly to implement the network optimization technically.
The network optimization is a long-term process, and it is through the overall process of network development.Only improve constantly the quality of network, could increase mobile subscriber's satisfaction and, and then attract and develop more user the cognition degree of service brand.Network optimization work is carried out parameter acquisition, data analysis to the network that formally puts into operation, finding out influences reason that network running quality descends and by parameter adjustment with take some technological means, make network reach optimal operational condition, make conventional network resources obtain optimum efficiency, simultaneously network maintenance and planning construction from now on proposed conductive suggestion.
In existing mobile communication network, the optimization of BCH (Broadcast Channel, broadcast channel covers) has very important significance.Mobile communications network covers by broadcast channel and user terminal is set up preliminary contact, and broadcast channel covers weak covering and may cause the user can not be resident, and the mistake covering can cause increasing the interference of minizone.Therefore, broadcast channel covers weak covering or crosses to cover and all can impact systematic function.Usually, the power that broadcast channel covers is all by manually being provided with, coverage according to the sub-district of the network planning, the transmitting power that broadcast channel covers is set, the optimization of the transmitting power that broadcast channel covers also is by manually being optimized, mostly artificial optimization's mode is according to the network planning or optimizes that the experience of engineering carries out, do not describe in detail at this.In order to reduce the artificial participation of the network planning and Operation and Maintenance, reduce the construction and the operation cost of network, constantly improve and the development mobile communications network, improve the performance of mobile communications network, therefore be necessary to propose the technical scheme of broadcast channel coverage self-optimizing, thereby in the optimizing process of mobile communications network, introduce the mechanism that net is optimized from network.
In traditional mobile communication system, usually adopt the standard of the quality of broadcast channel as the sub-district covering, for example, terminal is switched by measuring and report the reference as judgement of the power of PCCPCH (PrimaryCommon Control Physical Channel, Primary Common Control Physical Channel) channel of broadcast channel correspondence or signal to noise ratio.And at 3GPP (3rd Generation Partnership Project, third generation partnership projects) LTE (Long Term Evolution, Long Term Evolution) in the system, adopts the standard of the situation that covers as the judgement sub-district according to the quality of descending common reference symbol CRS.Relevant various measurement event are switched in the LTE system, all be by measure R SRP (Reference Signal ReceivePower, the reference symbol received power) or RSRQ (Reference Signal Receive Quality, the reference symbol quality of reception) adjudicate.Owing to directly do not concern between broadcast channel covering and the descending common reference symbol CRS in the LTE system, do optimization separately and guarantee that the coverage of the two is consistent so just need cover with descending common reference symbol CRS covering broadcast channel, and in the existing LTE standard, do not consider that broadcast channel covers, if in engineering, need to carry out planning and the optimization that broadcast channel covers, then need to redefine the measurement that broadcast channel is covered, bigger to the modification of existing standard.
In the BCH channel coverage optimization method of prior LTE system, following two kinds of schemes are arranged at present:
Scheme one: the BCH quality of channel is measured and reported to network by the signaling terminal, for example received signal level, signal to noise ratio etc., after obtaining the measurement result of terminal, network side judges according to measurement result whether system exists the BCH channel to cross the situation of covering or weak covering;
Scheme two: the information when the terminal record reads the failure of BCH channel, comprise sub-district Phy_ID, BCH channel received power, BCH channel signal to noise ratio etc., after the resident success in follow-up other position, information during with failure reports network side, and network side judges according to measurement result whether system exists the BCH channel to cross the situation of covering or weak covering.
Optimizing and revising of the just independent consideration BCH of existing BCH channel self-organization method channel power can not guarantee that BCH and other channel cover coupling.And needing increases extra measurement and the reporting information of terminal, is unfavorable for the power saving of terminal.Particularly, scheme one had both needed to increase newly to be controlled signaling or add new IE (Information Element, information word) in existing space interface signaling the measurement of BCH, needs the measurement type of redetermination to BCH again, bigger to the modification of existing standard; Scheme two needs terminal to increase some script LOG information newly, reports network then by eating dishes without rice or wine, and this has increased the burden of terminal and air interface undoubtedly to a certain extent.
Therefore, be necessary to propose a kind of technical scheme,, make implementation easy relatively, reduce manually participating in, reduce the operation cost of network to solve the problem of broadcast channel covering optimization.
Summary of the invention
Purpose of the present invention is intended to solve at least one of above-mentioned technological deficiency, particularly solves the problem of broadcast channel covering optimization, makes that the implementation of optimizing the broadcast channel covering is easy relatively, reduces manually participating in, and reduces the operation cost of network.
For achieving the above object, one aspect of the present invention has proposed a kind of broadcast channel covering optimization method, may further comprise the steps: network equipment is determined the transmitted power of broadcast channel according to the power of descending reference symbol RS channel; Described network equipment sends downstream signal to terminal, and the power of the power of described RS channel, the covering of described broadcast channel and the power sum of other down channels are no more than the gross power that specified downstream signal sends.
According to embodiments of the invention, determine that the transmitted power of broadcast channel comprises: the transmitted power Pbch=f of described broadcast channel (Prs), wherein, Prs is the power of descending reference symbol RS channel, mapping or the function of f for determining.
According to embodiments of the invention, when the power of adjusting described RS channel when the described network equipment was Prs ', the transmitted power that the described network equipment is adjusted described broadcast channel was Pbch=f (Prs ').
According to embodiments of the invention, there are fixing side-play amount Qoff in the transmitted power that is mapped as described broadcast channel that described f determines and the power of described RS channel, when the power of described RS channel is Prs1, the transmitted power that the described network equipment is adjusted described broadcast channel is Pbch=Prs1+Qoff.
According to embodiments of the invention, the criterion of determining described constant offset amount Qoff value comprises: according to different channel conditions, the difference of the demodulation threshold that described network equipment covers by described broadcast channel and the detection threshold of described RS channel is determined the value of described constant offset amount Qoff.
According to embodiments of the invention, comprise following any one mode or its combination according to different channel conditions:
Determine described channel condition according to the residing natural environment of described terminal, described natural environment comprises dense city, general city, suburb or marine site;
Determine described channel condition according to the translational speed of described terminal, described movement velocity comprise the speed, 60-120km/ hour of the speed, 20-60km/ hour of the speed that is lower than 3km/ hour, 3-20km/ hour speed, 120km-300km/ hour speed or greater than 300km/ hour speed.
According to embodiments of the invention, determine that described constant offset amount Qoff value obtains by Computer Simulation or engineering practice.
The present invention has also proposed a kind of network equipment on the other hand, comprise: the power division module, described power division module is used for the power according to descending reference symbol RS channel, determine the transmitted power of broadcast channel and the transmitted power of other channels, the gross power that the downstream signal that described power division module is determined sends is no more than rated power; Sending module, described sending module are used for sending described downstream signal to terminal.
According to embodiments of the invention, described power division module also comprises computing module, and described computing module is used for the power P rs according to described RS channel, calculate the transmitted power Pbch of described broadcast channel, computing formula is Pbch=f (Prs), wherein, and mapping or the function of f for determining.
According to embodiments of the invention, when the power of adjusting described RS channel when described power division module was Prs ', the transmitted power that described computing module upgrades described broadcast channel was Pbch=f (Prs ').
According to embodiments of the invention, there are fixing side-play amount Qoff in the transmitted power that is mapped as described broadcast channel that described f determines and the power of described RS channel, when the power of described RS channel is Prs1, described computing module calculates the transmitted power Pbch=Prs1+Qoff of described broadcast channel.
According to embodiments of the invention, described network equipment also comprises the channel condition judge module, described channel condition judge module is used to obtain the channel condition of described terminal, and described computing module is determined the value of described constant offset amount Qoff by the difference of the detection threshold of the demodulation threshold that calculates described broadcast channel and cover and described RS channel.
According to embodiments of the invention, described network equipment comprises base station or self-organizing network server.
The technical scheme that proposes according to the present invention has solved the problem of broadcast channel covering optimization in the system, goes for the BCH automatic or manual coverage optimization in systems such as LTE and follow-up evolution system such as LTE+.The technical scheme that the present invention proposes, also be applicable to and introduced SON (Self OrganisingNetworks, self-organizing network) system of characteristic, the SON characteristic has comprised aspect of network self-configuration, self-optimizing and has cured certainly, make in the network planning and optimizing process, reduce artificial the participation, reduce the operation cost of network.In addition, the technical scheme that the present invention proposes, very little to the change of existing system, can not influence the compatibility of system, and realize simple, efficient.
Aspect that the present invention adds and advantage part in the following description provide, and part will become obviously from the following description, or recognize by practice of the present invention.
Description of drawings
Above-mentioned and/or additional aspect of the present invention and advantage are from obviously and easily understanding becoming the description of embodiment below in conjunction with accompanying drawing, wherein:
Fig. 1 is for realizing the broadcast channel covering optimization method flow chart;
Fig. 2 is the structural representation of network equipment.
Embodiment
Describe embodiments of the invention below in detail, the example of described embodiment is shown in the drawings, and wherein identical from start to finish or similar label is represented identical or similar elements or the element with identical or similar functions.Below by the embodiment that is described with reference to the drawings is exemplary, only is used to explain the present invention, and can not be interpreted as limitation of the present invention.
For the ease of understanding the present invention, at first the situation that the LTE system power is distributed is done simple the introduction.In the LTE system, descending channel or signal can be divided into following several: downlink synchronous signal, RS channel, BCH, PDSCH (Physical Downlink Shared Channel, Physical Downlink Shared Channel), PDCCH (Physical Downlink Control Channel, Physical Downlink Control Channel).Wherein, there is a constant offset amount in the power of the transmitted power of PDSCH and PDCCH and RS channel.The power of BCH, synchronizing signal is separate configurations.
In the various down channels, synchronizing signal is used for the synchronous and detected cells of terminal initial, and demodulation threshold is very low on the Design of Signal, and terminal is easy to detect this signal, and the interference problem of minizone is also not obvious, so this signal is usually according to maximum transmission power.
In order to realize the present invention's purpose, promptly realize the coverage self-optimization of broadcast channel, and can reduce the artificial participation of the network planning and Operation and Maintenance, reduce the construction and the operation cost of network, by the incidence relation of determining will be set up between the transmitted power of the transmitted power of broadcast channel in the system and RS channel, just can realize that broadcast channel is covered with descending reference symbol RS covering to be done optimization simultaneously and guarantee that the coverage of the two is consistent.The present invention proposes a kind of broadcast channel covering optimization method, may further comprise the steps: network equipment is determined the transmitted power of broadcast channel according to the power of descending reference symbol RS channel; Described network equipment sends downstream signal to terminal, and the power of the power of described RS channel, the covering of described broadcast channel and the power sum of other down channels are no more than the gross power that specified downstream signal sends.
As shown in Figure 1, be broadcast channel covering optimization method flow chart disclosed by the invention, may further comprise the steps:
S101: network equipment is determined the transmitted power of broadcast channel according to the power of descending reference symbol RS channel.
In step S101, network equipment at first will be determined the transmitted power of descending reference symbol RS channel.For example, Prs is the power of descending reference symbol RS channel, is Pbch=f (Prs) with the transmitted power value of broadcast channel, wherein, and mapping or the function of f for determining.When the power of adjusting the RS channel when the network equipment was Prs ', the transmitted power that the network equipment will be adjusted broadcast channel was Pbch=f (Prs '), promptly kept definite incidence relation between the transmitted power of the transmitted power of broadcast channel and RS channel.
In the present invention, mapping or the function of f for determining, f can guarantee RS and BCH power match, thereby guarantees that further it is consistent that the RS channel covers with the BCH channel.
In concrete engineering practice, implement for simplifying, for example, there are fixing side-play amount Qoff in the transmitted power that is mapped as described broadcast channel that f determines and the power of RS channel, when the power of RS channel was Prs1, the transmitted power that the network equipment is adjusted broadcast channel was Pbch=Prs1+Qoff, and by reasonable configuration Qoff, reach BCH and RS and cover coupling, and be implemented in the RS power optimization and can realize the BCH coverage optimization automatically simultaneously.
In the planning or initial configuration of network system, satisfying under the certain situation of gross power, the power offset Qoff initial value between the power of configuration BCH channel and the power of RS symbol covers and RS covering coupling to reach the BCH channel.The Qoff initial value choose can by engineering experience or in advance method of emulation obtain, can obtain the detection threshold value of the demodulation threshold and the CRS of BCH channel earlier, get the difference that the Qoff value is two thresholdings then.Obviously, as long as achieve the above object, concrete implementer can also select or design voluntarily the mode of other configuration Qoff initial value.
As embodiments of the invention, the criterion of determining constant offset amount Qoff value can be: according to different channel conditions, the difference of the demodulation threshold that network equipment covers by broadcast channel and the detection threshold of described RS channel is determined the value of constant offset amount Qoff.
Wherein, comprise following any one mode or its combination according to different channel conditions:
Determine described channel condition according to the residing natural environment of described terminal, described natural environment comprises dense city, general city, suburb or marine site; Determine described channel condition according to the translational speed of described terminal, described movement velocity comprise the speed, 60-120km/ hour of the speed, 20-60km/ hour of the speed that is lower than 3km/ hour, 3-20km/ hour speed, 120km-300km/ hour speed or greater than 300km/ hour speed.
For example, under different channels, the difference situation of change of the demodulation threshold of BCH and the detection threshold of RS or other situations are set the span of certain Qoff, maximum Qmax and minimum value Qmin.Qoff can be according to different channel conditions, as dense city, and general city, different Qoff values is set in suburb, sea etc. respectively; In case and the Qoff setting rationally, big change has taken place in the channel condition that removes other regions, does not generally revise the Qoff value easily.Qoff can also be provided with different values according to the typical translational speed of user in the local area, because the channel fade conditions that different translational speeds is corresponding different, move speed below corresponding 20km/ hour as indoor distribution, outdoor low speed, corresponding 60-120km/ hour speed of highway, the corresponding speed more than 300km/ hour of high-speed railway, or the like; In case and the Qoff setting rationally, big change has taken place in the user's moving state that removes other regions, does not generally revise the Qoff value easily.Can also take all factors into consideration that user's typical translational speed factor is provided with the Qoff value in channel circumstance and the sub-district, for example, realize also in this patent protection range with weighting or implementation such as table look-up.
When carrying out the adjustment of RS power, for example:
The RSRP power of this sub-district is measured and reported to Serving cell by specifying the local area terminal, and method of measurement is: when the RSRP of local area was lower than a thresholding 1, then triggering terminal reported, and is defined as A2 and measures; Simultaneously, Serving cell specifies measurements of local area terminal to report the RSRP of local area and adjacent area, and method of measurement is: when the RSRP of adjacent area surpasses the certain thresholding 2 of local area RSRP, then trigger reporting, be defined as the A3 measurement; By disposing rational thresholding, if after A2 measures generation, do not have the A3 measurement to report for a long time, then thinking has the zone of very weak covering in the sub-district, and local area and adjacent area all do not reach certain covering level, at this moment, if it is maximum that RS power does not reach, then raise the power of RS.
On the contrary, if always the A3 incident is prior to the A2 reporting events, perhaps local area A2 reporting events never then may be that the power of the RS of system is excessive, then reduces the power of RS.
After the RS symbol power was adjusted, the power of BCH channel also changed according to the method for above-mentioned introduction thereupon accordingly, promptly kept the incidence relation of determining between the transmitted power of the transmitted power of broadcast channel and RS channel.
Because the setting of Qoff initial value is to guarantee that BCH covers to cover with RS mate, so when the RS coverage optimization, BCH has also and then carried out corresponding optimization and guaranteed still that the BCH channel covers with the RS covering mating.Like this, keeping under the certain situation of gross power, only need be optimized just passable to the RS covering, do not need to carry out separately again the optimization that BCH covers, thereby only need be at reasonable Qoff initial value of initial setting up, in the coverage optimization of whole common down channel, only need consider that the RS coverage optimization gets final product.This has simplified the coverage optimization of common down channel to a great extent, thereby is that operator provides convenience in optimizing LTE and follow-up gradual network system thereof.
Obviously, the method that other RS that do not mention for the present invention optimize also is applicable to the scheme of BCH coverage optimization of the present invention also should be considered as category disclosed by the invention.
S102: network equipment sends downstream signal to terminal, and wherein the power of broadcast channel covering and the power sum of other down channels are no more than specified gross power.
Carry out after the BCH coverage optimization according to step S101, need also to consider that it is this factor of rated power that network equipment sends gross power.Otherwise, will cause because RS heightens and heighten BCH power accordingly.For example, for each OFDM symbol, gross power is certain, this just will inevitably cause other channels, reduce and influence the reception of other channels as paging channel or other shared channel power, in this case, even RS and BCH have mated, also can cause not matching of other channels and BCH and RS.
Therefore, when sending downstream signal, need to guarantee that gross power is certain: Psum=Psch+Pbch+Prs+Ppch+Pothers, wherein, Psum is a gross power, Psch is a shared channel SCH power, and Ppch is a paging channel PCH power, and the implication of above-mentioned formula is that SCH power, BCH power, RS power, PCH power are certain in the symbol gross power of the power that adds other channels.If there are not other channels in this symbol, to transmit, Pothers=0 then.
The said method that the present invention proposes has solved the problem of broadcast channel covering optimization in the system, goes for the BCH automatic or manual coverage optimization in systems such as LTE and follow-up evolution system such as LTE+.The technical scheme that the present invention proposes, also be applicable to and introduced SON (Self OrganisingNetworks, self-organizing network) system of characteristic, the SON characteristic has comprised aspect of network self-configuration, self-optimizing and has cured certainly, make in the network planning and optimizing process, reduce artificial the participation, reduce the operation cost of network.In addition, the technical scheme that the present invention proposes, very little to the change of existing system, can not influence the compatibility of system, and realize simple, efficient.
As shown in Figure 2, the present invention has also proposed a kind of network equipment 200 on the other hand, comprises power division module 220, sending module 210.
Wherein, power division module 220 is used for the power according to descending reference symbol RS channel, determines the transmitted power of broadcast channel and the transmitted power of other channels, and the gross power that the downstream signal that power division module 220 is determined sends is no more than rated power; Sending module 210 is used for sending downstream signal to terminal.
As the embodiment of the said equipment, power division module 220 also comprises computing module 221, and computing module 221 is used for the power P rs according to the RS channel, calculate the transmitted power Pbch of broadcast channel, computing formula is Pbch=f (Prs), wherein, and mapping or the function of f for determining.
As the embodiment of the said equipment, when the power of adjusting the RS channels when power division module 220 was Prs ', the transmitted power that computing module 221 upgrades broadcast channels was Pbch=f (Prs ').
As the embodiment of the said equipment, there is fixing side-play amount Qoff in the transmitted power that is mapped as broadcast channel that f determines with the power of RS channel, when the power of RS channel is Prs1, and the transmitted power Pbch=Prs1+Qoff of computing module 221 calculating broadcast channels.
Embodiment as the said equipment, network equipment 200 also comprises channel condition judge module 230, channel condition judge module 230 is used to obtain the channel condition of terminal, and computing module 221 is determined the value of constant offset amount Qoff by the difference of the detection threshold of the demodulation threshold that calculates broadcast channel and cover and RS channel.
For example, under different channels, channel condition judge module 230 calculates difference situation of change or other situations of the detection threshold of the demodulation threshold of BCH and RS, sets the span of certain Qoff, maximum Qmax and minimum value Qmin.Qoff can be according to different channel conditions, as dense city, and general city, different Qoff values is set in suburb, sea etc. respectively; In case and the Qoff setting rationally, big change has taken place in the channel condition that removes other regions, does not generally revise the Qoff value easily.Qoff can also be provided with different values according to the typical translational speed of user in the local area, because the channel fade conditions that different translational speeds is corresponding different, move speed below corresponding 20km/ hour as indoor distribution, outdoor low speed, corresponding 60-120km/ hour speed of highway, the corresponding speed more than 300km/ hour of high-speed railway, or the like; In case and the Qoff setting rationally, big change has taken place in the user's moving state that removes other regions, does not generally revise the Qoff value easily.Can also take all factors into consideration that user's typical translational speed factor is provided with the Qoff value in channel circumstance and the sub-district, for example, realize also in this patent protection range with weighting or implementation such as table look-up.
As the embodiment of the said equipment, network equipment 200 comprises base station or self-organizing network server.When the self-organizing network server is realized above-mentioned functions, can also coordinate in a plurality of entities of network to finish above-mentioned function for being distributed in, and be not limited to be positioned at the situation of consolidated network equipment entity.
The said equipment that the present invention proposes has solved the problem of broadcast channel covering optimization in the system, goes for the BCH automatic or manual coverage optimization in systems such as LTE and follow-up evolution system such as LTE+.The said equipment that the present invention proposes, also be applicable to and introduced SON (Self OrganisingNetworks, self-organizing network) system of characteristic, the SON characteristic has comprised aspect of network self-configuration, self-optimizing and has cured certainly, make in the network planning and optimizing process, reduce artificial the participation, reduce the operation cost of network.In addition, the technical scheme that the present invention proposes, very little to the change of existing system, can not influence the compatibility of system, and realize simple, efficient.
The above only is a preferred implementation of the present invention; should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the principle of the invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (13)
1. a broadcast channel covering optimization method is characterized in that, may further comprise the steps:
Network equipment is determined the transmitted power of broadcast channel according to the power of descending reference symbol RS channel;
Described network equipment sends downstream signal to terminal, and the power of the power of described RS channel, the covering of described broadcast channel and the power sum of other down channels are no more than the gross power that specified downstream signal sends.
2. broadcast channel covering optimization method as claimed in claim 1 is characterized in that, determines that the transmitted power of broadcast channel comprises:
The transmitted power Pbch=f of described broadcast channel (Prs), wherein, Prs is the power of descending reference symbol RS channel, mapping or the function of f for determining.
3. broadcast channel covering optimization method as claimed in claim 2 is characterized in that, when the power of adjusting described RS channel when the described network equipment was Prs ', the transmitted power that the described network equipment is adjusted described broadcast channel was Pbch=f (Prs ').
4. as claim 2 or 3 described broadcast channel covering optimization method, it is characterized in that, there are fixing side-play amount Qoff in the transmitted power that is mapped as described broadcast channel that described f determines and the power of described RS channel, when the power of described RS channel is Prs1, the transmitted power that the described network equipment is adjusted described broadcast channel is Pbch=Prs1+Qoff.
5. broadcast channel covering optimization method as claimed in claim 4 is characterized in that, determines that the criterion of described constant offset amount Qoff value comprises:
According to different channel conditions, the difference of the demodulation threshold that described network equipment covers by described broadcast channel and the detection threshold of described RS channel is determined the value of described constant offset amount Qoff.
6. broadcast channel covering optimization method as claimed in claim 5 is characterized in that, comprises following any one mode or its combination according to different channel conditions:
Determine described channel condition according to the residing natural environment of described terminal, described natural environment comprises dense city, general city, suburb or marine site;
Determine described channel condition according to the translational speed of described terminal, described movement velocity comprise the speed, 60-120km/ hour of the speed, 20-60km/ hour of the speed that is lower than 3km/ hour, 3-20km/ hour speed, 120km-300km/ hour speed or greater than 300km/ hour speed.
7. broadcast channel covering optimization method as claimed in claim 4 is characterized in that, determines that described constant offset amount Qoff value obtains by Computer Simulation or engineering practice.
8. a network equipment is characterized in that, comprising:
The power division module, described power division module is used for the power according to descending reference symbol RS channel, determine the transmitted power of broadcast channel and the transmitted power of other channels, the gross power that the downstream signal that described power division module is determined sends is no more than rated power;
Sending module, described sending module are used for sending described downstream signal to terminal.
9. network equipment as claimed in claim 8, it is characterized in that, described power division module also comprises computing module, described computing module is used for the power P rs according to described RS channel, calculate the transmitted power Pbch of described broadcast channel, computing formula is Pbch=f (Prs), wherein, and mapping or the function of f for determining.
10. network equipment as claimed in claim 9 is characterized in that, when the power of adjusting described RS channel when described power division module was Prs ', the transmitted power that described computing module upgrades described broadcast channel was Pbch=f (Prs ').
11. as claim 9 or 10 described network equipments, it is characterized in that, there are fixing side-play amount Qoff in the transmitted power that is mapped as described broadcast channel that described f determines and the power of described RS channel, when the power of described RS channel is Prs1, described computing module calculates the transmitted power Pbch=Prs1+Qoff of described broadcast channel.
12. network equipment as claimed in claim 11, it is characterized in that, described network equipment also comprises the channel condition judge module, described channel condition judge module is used to obtain the channel condition of described terminal, and described computing module is determined the value of described constant offset amount Qoff by the difference of the detection threshold of the demodulation threshold that calculates described broadcast channel and cover and described RS channel.
13. network equipment as claimed in claim 12 is characterized in that, described network equipment comprises base station or self-organizing network server.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105007136A (en) * | 2014-04-23 | 2015-10-28 | 中兴通讯股份有限公司 | Method and device for measuring wireless channel response of TD-LTE system |
| CN110233650A (en) * | 2019-05-09 | 2019-09-13 | 中国科学院计算技术研究所 | Power regulating method and system in a kind of MIMO-NOMA system |
| CN111727637A (en) * | 2018-02-13 | 2020-09-29 | 高通股份有限公司 | Estimating narrow band reference signal received power parameters |
| CN113038485A (en) * | 2019-12-24 | 2021-06-25 | 中国移动通信集团浙江有限公司 | MDT data-based base station cell power parameter calculation method and device |
-
2009
- 2009-04-20 CN CN200910082284A patent/CN101867935A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105007136A (en) * | 2014-04-23 | 2015-10-28 | 中兴通讯股份有限公司 | Method and device for measuring wireless channel response of TD-LTE system |
| CN111727637A (en) * | 2018-02-13 | 2020-09-29 | 高通股份有限公司 | Estimating narrow band reference signal received power parameters |
| CN110233650A (en) * | 2019-05-09 | 2019-09-13 | 中国科学院计算技术研究所 | Power regulating method and system in a kind of MIMO-NOMA system |
| CN113038485A (en) * | 2019-12-24 | 2021-06-25 | 中国移动通信集团浙江有限公司 | MDT data-based base station cell power parameter calculation method and device |
| CN113038485B (en) * | 2019-12-24 | 2022-09-16 | 中国移动通信集团浙江有限公司 | MDT data-based base station cell power parameter calculation method and device |
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