CN105375963A - Radiation diagram configurable antenna for micro cell base station - Google Patents
Radiation diagram configurable antenna for micro cell base station Download PDFInfo
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- CN105375963A CN105375963A CN201410427818.1A CN201410427818A CN105375963A CN 105375963 A CN105375963 A CN 105375963A CN 201410427818 A CN201410427818 A CN 201410427818A CN 105375963 A CN105375963 A CN 105375963A
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Abstract
The present invention relates to a radiation diagram configurable antenna for a micro cell base station in a wireless communication system. The antenna comprises a first antenna which is configured to provide basic coverage such that the user equipment in the coverage of the radiation diagram configurable antenna can obtain basic system and control information and access a network, an antenna control module which is configured to obtain first information from a baseband and generate a first control signal according to the first information, and at least one second antenna which is coupled to the antenna control module and generates a first beam pattern according to the first control signal. The antenna can be applied to the micro cell base station and has at least one second antenna and the antenna control module, thus the antenna control module can generate the control signal according to the information obtained from the base band such that the beam forming of the first antenna and the at least one second antenna, and the corresponding beam pattern is formed to maximize the use of wireless resources.
Description
Technical field
The present invention relates to wireless communication field, more specifically, relate to the configurable antenna of a kind of radiation diagram for the microcell base station in wireless communication system.
Background technology
Microcell base station (BS) is designed to typically to be subscriber equipment (UE) service of lesser amt and among the hot spot region being usually deployed in mobile network or indoor environment.Because Microcell is supposed to provide service for the user of the local zone for multiple static state, so transmit beamforming then becomes one of key technology improving system capability, coverage and energy utilization rate, to be formed towards the wave beam of the orientation of desired user, form zero at interference radiating way simultaneously and fall into.Traditional mode of beam forming is to use aerial array.But for microcell base station, its citation form should be low cost and be restricted to little size, so multiple antennas and radio-frequency front-end will cause the size, cost and the complexity that add on a platform.Therefore, the beam forming solution of low cost is then Worth Expecting for microcell base station.
On the other hand, when improving for link-quality enhancing or data transfer rate on the subscriber equipment that transmitting energy (wave beam) focuses on activation, for other nonactivated users, how the subscriber equipment of the subscriber equipment newly entered such as needing initialization access procedure (obtaining synchronous and cell system information) or the RRC-free time needing Stochastic accessing or acquisition paging information, go the basic coverage ensureing these subscriber equipmenies to be then a large problem.Especially, for the Idle subscriber devices of not transmitting uplink signals, base station is not even estimated to obtain its positional information by up link DOA.
Traditional beam forming by aerial array with simulation or the mode of numeral realize.Such mode is efficient, but for consider many radio-frequency front-ends, the space hold added and for DOA estimate Array Signal Processing computation burden microcell base station be then inappropriate.
The most wave beam controlling mechanisms occurred in published paper merely provide the beam forming optimized algorithm based on conventional antenna array improved for quality of wireless channel or system capability.According to the knowledge of the present inventor, do not apply configurable antenna in a base station when considering the more actual problem of real LTE system.Even for traditional beamforming system, different User Status (namely activating or idle condition) does not also take in and is not also treated with a certain discrimination when implementing beam forming, and this will cause the appearance of the problem of the coverage of non-excited users.
Summary of the invention
The present invention proposes a kind of for LTE microcell base station, based on the solution of the low cost of the configurable antenna of radiation direction, can to reduce costs significantly thus, weight, volume etc.Present invention also offers a kind of corresponding wave beam controlling mechanism, to guarantee the basic coverage of all (activation with free time) user while the data transfer rate that improve realizing the subscriber equipment activated.
According to the understanding of the above-mentioned technical problem to background technology and existence, the present invention proposes the configurable antenna of a kind of radiation diagram for the microcell base station in wireless communication system, described antenna comprises:
First antenna, it is configured to provide basic coverage, can obtain basic system and control information and access network to make all subscriber equipmenies within the coverage of the configurable antenna of described radiation diagram;
Antenna control module, it is configured to obtain the first information from base band and produce the first control signal accordingly; And
At least one second antenna, it is configured to couple mutually with described antenna control module and produce the first beam pattern according to described first control signal.
Microcell base station can be applied to according to the configurable antenna of radiation diagram of the present invention, it is different from traditional microcell base station and has at least one second antenna, there is an antenna control module in addition, thus make this antenna control module can produce control signal to control the beam forming of this first antenna and at least one the second antenna according to the information obtained among base band, form corresponding beam pattern to maximize the utilization of Radio Resource.
Among foundation one embodiment of the present of invention, described first antenna and at least one second antenna described have common radio-frequency front-end.The structure of antenna can be simplified by this way and reduce the manufacturing cost of antenna.
Among foundation one embodiment of the present of invention, between described radio-frequency front-end and described first antenna and at least one second antenna described, be provided with power divider, described power divider is configured to as described first antenna and the corresponding power of at least one the second antenna assignment described.Just can come, for the suitable power of corresponding antenna assignment, to have reached the effect utilizing existing hardware resource substantially by means of power divider by this way.
Among foundation one embodiment of the present of invention, described first antenna and at least one second antenna described have the first radio-frequency front-end and the second radio-frequency front-end respectively.In such processes, just independently the first and second antennas can be made can to launch the signal with corresponding radiation diagram, to communicate respectively with the subscriber equipment of the different directions at antenna for cost to have independently radio-frequency front-end.
Among foundation one embodiment of the present of invention, described first antenna is also configured to couple mutually with described antenna control module and produces the second beam pattern according to described first control signal so that the subscriber equipment be configured to as activating provides the beam forming corresponding to described second beam pattern on the time slot not needing to send to the subscriber equipment of free time downstream signal or subframe.The first antenna is made not only to be configured to provide basic coverage by this way, to make all subscriber equipmenies within the coverage of the configurable antenna of described radiation diagram can obtain basic system and control information and access network, but also the Radio Resource that can make full use of this first antenna when not needing to provide corresponding downstream signal is used for other subscriber equipmenies activated to maximize the utilization ratio of the Radio Resource had.
Among foundation one embodiment of the present of invention, described first antenna is also configured to omnidirectional antenna or broad beam pattern.Just can provide basic by this way to cover, basic system and control information can be obtained and access network to make all subscriber equipmenies within the coverage of the configurable antenna of described radiation diagram.
According among one embodiment of the present of invention, described antenna control module be also controlled as control described first antenna and at least one the second antenna described polarization, beam forming figure and frequency range.Those skilled in the art should understand, and this antenna control module can also control other antenna parameter.
According among one embodiment of the present of invention, described first antenna and at least one second antenna described are isolated by space when placing or the mode of orthogonal polarization reduces mutual interference between described first antenna and at least one second antenna described.At this, given execution mode is only illustrative rather than restrictive, as long as the antenna arrangement mode that can alleviate the mutual interference between two or more antennas is all feasible.
According among one embodiment of the present of invention, described first antenna and/or at least one second antenna described are according to its respective beam pattern configuration scanning subscriber equipment and estimate the arrival direction of corresponding subscriber equipment according to uplink signal feature.Those skilled in the art should understand, and the mode of scanning described herein is only a kind of feasible execution mode, other for identify or the method for arrival direction of estimating user equipment is also feasible.
Among foundation one embodiment of the present of invention, described first antenna and/or at least one second antenna described rescan subscriber equipment, when there is at least one in following situation:
The receptivity of-subscriber equipment declines and lower than threshold value given in advance;
The subscriber equipment of-Xin is connected to described microcell base station; And/or
The subscriber equipment of-idle condition enters state of activation.
These situations all can make the situation of the subscriber equipment in the overlay area of the antenna of described microcell base station change above, such as new subscriber equipment enters this Microcell, be originally in the subscriber equipment of idle condition reentered among the state that activates or subscriber equipment owing to such as making receptivity decline etc. away from this microcell base station.
Among foundation one embodiment of the present of invention, described first antenna and/or at least one second antenna described adopt the mode of frequency division multiplexing to form beam forming and communicate with described subscriber equipment.Those skilled in the art should understand, and frequency division multiplexing is only a kind of exemplary multiplex mode, and other multiplex modes that can realize similar effects are applicable equally.
Among foundation one embodiment of the present of invention, described first antenna and/or at least one second antenna described adopt time-multiplexed mode to form beam forming and communicate with described subscriber equipment.Those skilled in the art should understand, and time division multiplexing is only a kind of exemplary multiplex mode, and other multiplex modes that can realize similar effects are applicable equally.
Among foundation one embodiment of the present of invention, described first antenna and/or at least one second antenna described adopt the mode of time-division frequency division multiplexing to form beam forming and communicate with described subscriber equipment.Those skilled in the art should understand, and frequency division and time division multiplexing is only a kind of exemplary multiplex mode, and other multiplex modes that can realize similar effects are applicable equally.
According among one embodiment of the present of invention, the communications of user equipment on described first antenna and/or different from being in two on the identical running time-frequency resource independently of each other direction of at least one second antenna described.So just can realize separate while use identical running time-frequency resource, and mutual interference is also less.
Among foundation one embodiment of the present of invention, the described first information comprises the link-quality of subscriber equipment or reaches the information in direction.
Microcell base station can be applied to according to the configurable antenna of radiation diagram of the present invention, it is different from traditional microcell base station and has at least one second antenna, there is an antenna control module in addition, thus make this antenna control module can produce control signal to control the beam forming of this first antenna and at least one the second antenna according to the information obtained among base band, form corresponding beam pattern to maximize the utilization of Radio Resource.
Accompanying drawing explanation
Read the following detailed description to non-limiting example by referring to accompanying drawing, other features, objects and advantages of the present invention will become more obvious.
Fig. 1 shows signal Figure 100 of an embodiment according to the configurable antenna of the radiation diagram for the microcell base station in wireless communication system of the present invention; And
Fig. 2 shows signal Figure 200 of another embodiment according to the configurable antenna of the radiation diagram for the microcell base station in wireless communication system of the present invention.
In the drawings, run through different diagrams, same or similar Reference numeral represents same or analogous device (module) or step.
Embodiment
In the specific descriptions of following preferred embodiment, with reference to the accompanying drawing formed appended by a part of the present invention.Appended accompanying drawing shows by way of example and can realize specific embodiment of the present invention.The embodiment of example is not intended to limit according to all embodiments of the present invention.Be appreciated that under the prerequisite not departing from scope of the present invention, other embodiments can be utilized, also can carry out amendment that is structural or logicality.Therefore, following specific descriptions are also nonrestrictive, and scope of the present invention limited by appended claim.
In the present invention, the configurable antenna of radiation direction is used to implement beam forming under the Electronic Control of radio-frequency antenna control module.For each radio-frequency antenna, only just can be shaped beam modes (differentbeampattern) different by means of single radio frequency chain and be switched on different directions.
In order to the basic coverage and data of guaranteeing all subscriber equipmenies strengthen simultaneously, among system of the present invention, apply two radio-frequency antennas.As shown in Figure 1, show two radio-frequency antennas, but share a radio-frequency front-end.RA1, is operated under omnidirectional or angle pencil of ray pattern to guarantee that all subscriber equipmenies can obtain system and the control information on basis substantially for providing the coverage on basis.The link performance that RA2 focuses on the subscriber equipment for activating by directional beam strengthens.At this, power divider is used to the gross power of input be divided to connected two antennas.
Radio-frequency antenna control module is used for obtaining the information of the DOA of such as link-quality or subscriber equipment from base band and control signal being sent to radio-frequency antenna so that the beam direction desired by being formed.This beam forming also can combine to reach the system capability through optimizing with the scheduling of OFDMA running time-frequency resource.
The expansion of the solution shown in Fig. 1 can use two rf chains, as shown in Figure 2.Apparently, this brings with the extra cost increasing a set of radio-frequency front-end the systematic function controlling more flexibly and improve.In the present invention, among LTE system, be easy to beam switchover to dispatch with multi-user's running time-frequency resource the combined optimization that combines, or even reuse for resource among identical community by using towards the different wave beam of isolated subscriber equipment.
As shown in Figure 1, the present invention proposes the configurable antenna of a kind of radiation diagram for the microcell base station in wireless communication system, described antenna comprises:
First antenna RA1, it is configured to provide basic coverage, can obtain basic system and control information and access network to make all subscriber equipmenies within the coverage of the configurable antenna of described radiation diagram;
Antenna control module, it is configured to obtain the first information from base band and produce the first control signal accordingly; And
At least one second antenna RA2, it is configured to couple mutually with described antenna control module and produce the first beam pattern according to described first control signal.
Microcell base station can be applied to according to the configurable antenna of radiation diagram of the present invention, it is different from traditional microcell base station and has at least one second antenna, there is an antenna control module in addition, thus make this antenna control module can produce control signal to control the beam forming of this first antenna and at least one the second antenna according to the information obtained among base band, form corresponding beam pattern to maximize the utilization of Radio Resource.
Among foundation one embodiment of the present of invention, described first antenna and at least one second antenna described have common radio-frequency front-end (as shown in Figure 1).The structure of antenna can be simplified by this way and reduce the manufacturing cost of antenna.
Among foundation one embodiment of the present of invention, between described radio-frequency front-end and described first antenna and at least one second antenna described, be provided with power divider, described power divider is configured to as described first antenna and the corresponding power of at least one the second antenna assignment described.Just can come, for the suitable power of corresponding antenna assignment, to have reached the effect utilizing existing hardware resource substantially by means of power divider by this way.
Among foundation one embodiment of the present of invention, described first antenna and at least one second antenna described have the first radio-frequency front-end and the second radio-frequency front-end respectively.In such processes, just independently the first and second antennas can be made can to launch the signal with corresponding radiation diagram, to communicate respectively with the subscriber equipment of the different directions at antenna for cost to have independently radio-frequency front-end.
Among foundation one embodiment of the present of invention, described first antenna is also configured to couple mutually with described antenna control module and produces the second beam pattern according to described first control signal so that the subscriber equipment be configured to as activating provides the beam forming corresponding to described second beam pattern on the time slot not needing to send to the subscriber equipment of free time downstream signal or subframe.The first antenna is made not only to be configured to provide basic coverage by this way, to make all subscriber equipmenies within the coverage of the configurable antenna of described radiation diagram can obtain basic system and control information and access network, but also the Radio Resource that can make full use of this first antenna when not needing to provide corresponding downstream signal is used for other subscriber equipmenies activated to maximize the utilization ratio of the Radio Resource had.
Among foundation one embodiment of the present of invention, described first antenna is also configured to omnidirectional antenna or broad beam pattern.Just can provide basic by this way to cover, basic system and control information can be obtained and access network to make all subscriber equipmenies within the coverage of the configurable antenna of described radiation diagram.
According among one embodiment of the present of invention, described antenna control module be also controlled as control described first antenna and at least one the second antenna described polarization, beam forming figure and frequency range.Those skilled in the art should understand, and this antenna control module can also control other antenna parameter.
According among one embodiment of the present of invention, described first antenna and at least one second antenna described are isolated by space when placing or the mode of orthogonal polarization reduces mutual interference between described first antenna and at least one second antenna described.Such as, described first antenna and at least one second antenna described are arranged on the two ends of the configurable antenna of described radiation diagram respectively, to reduce the mutual interference between described first antenna and at least one second antenna described.At this, given execution mode is only illustrative rather than restrictive, as long as the antenna arrangement mode that can alleviate the mutual interference between two or more antennas is all feasible.
According among one embodiment of the present of invention, described first antenna and/or at least one second antenna described are according to its respective beam pattern configuration scanning subscriber equipment and estimate the arrival direction of corresponding subscriber equipment according to uplink signal feature.Those skilled in the art should understand, and the mode of scanning described herein is only a kind of feasible execution mode, other for identify or the method for arrival direction of estimating user equipment is also feasible.
Among foundation one embodiment of the present of invention, described first antenna and/or at least one second antenna described rescan subscriber equipment, when there is at least one in following situation:
The receptivity of-subscriber equipment declines and lower than threshold value given in advance;
The subscriber equipment of-Xin is connected to described microcell base station; And/or
The subscriber equipment of-idle condition enters state of activation.
These situations all can make the situation of the subscriber equipment in the overlay area of the antenna of described microcell base station change above, such as new subscriber equipment enters this Microcell, be originally in the subscriber equipment of idle condition reentered among the state that activates or subscriber equipment owing to such as making receptivity decline etc. away from this microcell base station.
Among foundation one embodiment of the present of invention, described first antenna and/or at least one second antenna described adopt the mode of frequency division multiplexing to form beam forming and communicate with described subscriber equipment.Those skilled in the art should understand, and frequency division multiplexing is only a kind of exemplary multiplex mode, and other multiplex modes that can realize similar effects are applicable equally.
Among foundation one embodiment of the present of invention, described first antenna and/or at least one second antenna described adopt time-multiplexed mode to form beam forming and communicate with described subscriber equipment.Those skilled in the art should understand, and time division multiplexing is only a kind of exemplary multiplex mode, and other multiplex modes that can realize similar effects are applicable equally.
Among foundation one embodiment of the present of invention, described first antenna and/or at least one second antenna described adopt the mode of time-division frequency division multiplexing to form beam forming and communicate with described subscriber equipment.Those skilled in the art should understand, and frequency division and time division multiplexing is only a kind of exemplary multiplex mode, and other multiplex modes that can realize similar effects are applicable equally.
According among one embodiment of the present of invention, the communications of user equipment on described first antenna and/or different from being in two on the identical running time-frequency resource independently of each other direction of at least one second antenna described.So just can realize separate while use identical running time-frequency resource, and mutual interference is also less.
Among foundation one embodiment of the present of invention, the described first information comprises the link-quality of subscriber equipment or reaches the information in direction.
Microcell base station can be applied to according to the configurable antenna of radiation diagram of the present invention, it is different from traditional microcell base station and has at least one second antenna, there is an antenna control module in addition, thus make this antenna control module can produce control signal to control the beam forming of this first antenna and at least one the second antenna according to the information obtained among base band, form corresponding beam pattern to maximize the utilization of Radio Resource.
To those skilled in the art, obviously the invention is not restricted to the details of above-mentioned one exemplary embodiment, and when not deviating from spirit of the present invention or essential characteristic, the present invention can be realized in other specific forms.Therefore, in any case, all should embodiment be regarded as exemplary, and be nonrestrictive.In addition, significantly, " comprising " one word do not get rid of other elements and step, and wording " one " does not get rid of plural number.Multiple elements of stating in device claim also can be realized by an element.First, second word such as grade is used for representing title, and does not represent any specific order.
Claims (15)
1., for the configurable antenna of radiation diagram of the microcell base station in wireless communication system, described antenna comprises:
First antenna, it is configured to provide basic coverage, can obtain basic system and control information and access network to make all subscriber equipmenies within the coverage of the configurable antenna of described radiation diagram;
Antenna control module, it is configured to obtain the first information from base band and produce the first control signal accordingly; And
At least one second antenna, it is configured to couple mutually with described antenna control module and produce the first beam pattern according to described first control signal.
2. the configurable antenna of radiation diagram according to claim 1, is characterized in that, described first antenna and at least one second antenna described have common radio-frequency front-end.
3. the configurable antenna of radiation diagram according to claim 1, it is characterized in that, between described radio-frequency front-end and described first antenna and at least one second antenna described, be provided with power divider, described power divider is configured to as described first antenna and the corresponding power of at least one the second antenna assignment described.
4. the configurable antenna of radiation diagram according to claim 1, is characterized in that, described first antenna and at least one second antenna described have the first radio-frequency front-end and the second radio-frequency front-end respectively.
5. the configurable antenna of radiation diagram according to claim 1, it is characterized in that, described first antenna is also configured to couple mutually with described antenna control module and produces the second beam pattern according to described first control signal so that the subscriber equipment be configured to as activating provides the beam forming corresponding to described second beam pattern on the time slot not needing to send to the subscriber equipment of free time downstream signal or subframe.
6. the configurable antenna of radiation diagram according to claim 1, is characterized in that, described first antenna is also configured to omnidirectional antenna or broad beam pattern.
7. the configurable antenna of radiation diagram according to claim 1, is characterized in that, described antenna control module be also controlled as control described first antenna and at least one the second antenna described polarization, beam forming figure and frequency range.
8. the configurable antenna of radiation diagram according to claim 1, it is characterized in that, described first antenna and at least one second antenna described are isolated by space when placing or the mode of orthogonal polarization reduces mutual interference between described first antenna and at least one second antenna described.
9. the configurable antenna of radiation diagram according to claim 1, it is characterized in that, described first antenna and/or at least one second antenna described are according to its respective beam pattern configuration scanning subscriber equipment and estimate the arrival direction of corresponding subscriber equipment according to uplink signal feature.
10. the configurable antenna of radiation diagram according to claim 9, is characterized in that, described first antenna and/or at least one second antenna described rescan subscriber equipment, when there is at least one in following situation:
The receptivity of-subscriber equipment declines and lower than threshold value given in advance;
The subscriber equipment of-Xin is connected to described microcell base station; And/or
The subscriber equipment of-idle condition enters state of activation.
The configurable antenna of 11. radiation diagram according to claim 1, is characterized in that, described first antenna and/or at least one second antenna described adopt the mode of frequency division multiplexing to form beam forming and communicate with described subscriber equipment.
The configurable antenna of 12. radiation diagram according to claim 1, is characterized in that, described first antenna and/or at least one second antenna described adopt time-multiplexed mode to form beam forming and communicate with described subscriber equipment.
The configurable antenna of 13. radiation diagram according to claim 1, is characterized in that, described first antenna and/or at least one second antenna described adopt the mode of time-division frequency division multiplexing to form beam forming and communicate with described subscriber equipment.
The configurable antenna of 14. radiation diagram according to claim 1, is characterized in that, the communications of user equipment on described first antenna and/or different from being in two on the identical running time-frequency resource independently of each other direction of at least one second antenna described.
The configurable antenna of 15. radiation diagram according to claim 1, is characterized in that, the described first information comprises the link-quality of subscriber equipment or reaches the information in direction.
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| CN201410427818.1A CN105375963A (en) | 2014-08-27 | 2014-08-27 | Radiation diagram configurable antenna for micro cell base station |
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| CN201410427818.1A CN105375963A (en) | 2014-08-27 | 2014-08-27 | Radiation diagram configurable antenna for micro cell base station |
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