CN101420725A - System and method for determining initial detection group in double layered wireless access network - Google Patents
System and method for determining initial detection group in double layered wireless access network Download PDFInfo
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- CN101420725A CN101420725A CNA2007101804005A CN200710180400A CN101420725A CN 101420725 A CN101420725 A CN 101420725A CN A2007101804005 A CNA2007101804005 A CN A2007101804005A CN 200710180400 A CN200710180400 A CN 200710180400A CN 101420725 A CN101420725 A CN 101420725A
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Abstract
The invention discloses a method for determining initial detection diversity in a double-layer wireless access network. The method comprises the following processes: a communication processing and control unit determines a position of a wireless terminal by a first-type wireless contact; and the communication processing and control unit determines the initial detection diversity for a second-type wireless contact according to the position of the wireless terminal. The wireless terminal can be quickly accessed to a microcell by the method, thus improving the implementation speed of diversity transmission and diversity receiving of a hierarchical access network.
Description
Technical field
The present invention relates to wireless communication field, relate in particular to the system and method for in double layered wireless access network, determining initial detection group.
Background technology
In cell mobile communication systems, the switching of minizone, the emission of the diversity of adjacent minizone and diversity reception all relate to surveying determining and renewal of collection.The element of surveying collection is the distinguished symbol of one group of potential WAP (wireless access point) that may be used to communicate to connect, and the wireless contact distinguished symbol of surveying in the collection can be numbering, the coding corresponding with particular access point.Wireless access network at portable terminal to the probe value of surveying collection (for example, the signal-to-interference ratio measurement value) determining which or which wireless contact on the basis belongs to active set and determines which or which wireless contact and belong to Candidate Set, wherein, wireless contact in the active set participates in the transmission and the reception of signal, wireless contact in the Candidate Set is after its signal interference ratio reaches certain condition, for example the signal-to-interference ratio measurement value of certain contact in the Candidate Set reaches the signal interference ratio that the signal-to-interference ratio measurement value of presetting certain contact in thresholding or the Candidate Set has surpassed certain wireless contact of active set, wireless contact in this Candidate Set is adjusted to active set, participates in the transmission and the reception of signal.
Determining to survey collection is the prerequisite that obtains Candidate Set and active set, the size of surveying collection whether rationally, whether accurately can be directly connected to the switch speed of system, under the sub-district framework that the bilayer be made up of macrocell and Microcell covers, determine to be directly connected to the power consumption of wireless terminal accurately, fast to the access speed and the wireless terminal of Microcell to what the Microcell WAP (wireless access point) was surveyed collection.
At present, in the mobile communication Access Network of individual layer covered structure, produced following and definite relevant technology of collection of surveying:
Prior art discloses a kind of method of candidate cell of definite active set: the quality factor of determining each sub-district in the active set, determine the quality factor of test cell, be satisfied if be given for the standard of accepting of the limit value of accepting test cell, then test cell is accepted as the candidate cell of active set.
Prior art discloses a kind of automatic method to the cell setting priority in the neighbor list of communication system.The sub-district that priority is defined as in the neighbor list is added to the interior number of times of active set, and the more frequent sub-district that is added in the active set is given higher priority.When adding the monitoring collection to, the sub-district of such higher priority is at first considered, because they more may successfully move to active set from the monitoring collection.
Prior art has disclosed the technology that a kind of minimum call is set up the stand-by period.On the one hand, channel assignment message is sent out use with the service parameter that guides previous negotiation with mark, and the needs of service negotiation message have been saved in this aspect.On the other hand, channel assignment message is sent out with the active set identifier, rather than send active set with and parameter, this aspect has reduced the transmission time of channel assignment message.In addition, there is not the call setup of paging to become convenient by mobile radio station transmission Pilot Strength Measurement Message between the active communications dialogue, make channel assignment message can be used to make the mobile radio station suspended call to set up, and do not need paging of mobile stations and relevant message.
Though the problem difference that these technology solve, it is known all to suppose to survey collection.This hypothesis is set up for the individual layer cell mobile communication systems, as long as just can as surveying collection in one group of adjacent sub-district of the base station of serving BS or request access.Under the wireless accessing network structure that bilayer covers, determining of Microcell initial detection group is exactly a new problem.
A kind of wireless access system of hierarchy is disclosed in the prior art, this system comprises macrocell and Microcell, all Microcells and macrocell shared control channel in the macrocell, control channel are used for transmission and insert solicited message, paging information, travelling carriage and base station position information etc.Further, Microcell also has a shared Common Control Channel that is independent of hierarchy.The method of work of this system is: a business that inserts to the macrocell request is except being linked into this macrocell, also be linked into a Microcell that belongs to this macrocell, use the realization of macrocell and Microcell the grand diversity of the control channel of this link and the grand diversity of Traffic Channel.
Prior art also discloses a kind of hierarchical cellular radio communications system, and this service system comprises a umbrella macrocell and a plurality of picocells that covered by this macrocell, and each macrocell and sub-district comprise a controlling center.A secondary (terminal) has a communication channel of system communication therewith, and it is divided into the control subchannel that is used for control information transmission and is used for the subchannel data of transmitting user data.The control subchannel is connected to the main website that serves macrocell with secondary (terminal), and subchannel data is connected to secondary (terminal) main website of service picocell.The control section of described channel is mainly served by the umbrella macrocell, thereby reduces frequent mobile management expense, and data division is mainly served by the Microcell that can support high data rate and big packing density.
The determining of Microcell WAP (wireless access point) initial detection group needs a problem solving under the layer architecture, but do not discuss this question in the prior art.
Summary of the invention
Consider prior art problems and make the present invention.
According to an aspect of the present invention, a kind of system that determines initial detection group in double layered wireless access network is provided, comprise the wireless contact of at least one first kind, the wireless contact of at least one second class, at least one wireless terminal and at least one communication process and control unit, wherein, wireless contact of the terminal and the first kind and the wireless contact of second class are mutual, and communication process and control unit also comprise: the wireless terminal position determination module is used to use the wireless contact of the first kind to determine the position of wireless terminal; And the initial detection group determination module, be used for according to the initial detection group of determining by the position of the determined wireless terminal of wireless terminal position determination module for the wireless contact of second class.
Wherein, the wireless contact of second class is covered by the wireless contact of the first kind, and perhaps there is overlapping in the overlay area of the overlay area of the wireless contact of second class and the wireless contact of the first kind.
According to a further aspect in the invention, provide a kind of method of determining initial detection group in double layered wireless access network, this method comprises following processing: communication process and control unit use the wireless contact of the first kind to determine the position of wireless terminal; And communication process and control unit are determined initial detection group for the wireless contact of second class according to the position of wireless terminal.
Communication process and control unit can use the time of advent difference of wireless terminal to position to determine the coordinate points of the position of wireless terminal.
Communication process and control unit can use global positioning system signal to position to determine the coordinate points of the position of wireless terminal.
Communication process and control unit can use the wave beam arrival direction of two-way time of wireless terminal and base station and associated matrix array antenna to determine the coordinate points of the position of wireless terminal.
Under the situation of the coordinate points of determining wireless terminal position, the method of determining initial detection group comprises following processing: with the coordinate points of the position of determined wireless terminal as the center of circle, the wireless contact of second class is to the Euclidean distance in the center of circle around calculating, and the distance of choosing the center of circle then is less than the wireless contact of second class of the predetermined radii element as initial detection group.
Communication process and control unit can use and the wireless terminal and the two-way time of base station position and combine the curve that the fan antenna direction further reduces the scope to determine the position of wireless terminal.
Under the situation of the curve of determining wireless terminal position, determine that the method for initial detection group comprises following processing: as the reference curve, the wireless contact of second class is to the vertical range of curve around calculating with the curve of the position of determined wireless terminal; And the vertical range of choosing curve is less than the wireless contact of second class of the predetermined value element as initial detection group.
Determine surveying collection is the prerequisite that obtains Candidate Set and active set, the size of surveying collection whether rationally, whether accurate, not only be related to the access speed of system, and have influence on the performance of transmit diversity and receive diversity.Under the Access Network framework that the bilayer of being made up of macrocell and Microcell covers, by the given definite method of the present invention to the initial detection group of Microcell WAP (wireless access point), make wireless terminal insert Microcell fast, improved the performance of layer-specific access net aspect diversity emission and diversity reception.
Other features and advantages of the present invention will be set forth in the following description, and, partly from specification, become apparent, perhaps understand by implementing the present invention.Purpose of the present invention and other advantages can realize and obtain by specifically noted structure in the specification of being write, claims and accompanying drawing.
Description of drawings
Accompanying drawing is used to provide further understanding of the present invention, and constitutes the part of specification, is used from explanation the present invention with embodiments of the invention one, is not construed as limiting the invention.In the accompanying drawings:
Fig. 1 illustrates the block diagram of determining the system of initial detection group according to of the present invention in double layered wireless access network;
Fig. 2 illustrates the flow chart of determining the method for initial detection group according to of the present invention in double layered wireless access network;
Fig. 3 illustrates the schematic diagram of determining the method for initial detection group according to of the present invention in double layered wireless access network;
Fig. 4 illustrates the schematic diagram of determining the another kind of method of initial detection group according to of the present invention in double layered wireless access network; And
Fig. 5 is the schematic diagram that illustrates according to the transmit diversity of the double-deck mobile communication system of the embodiment of the invention.
Embodiment
Below in conjunction with accompanying drawing the preferred embodiments of the present invention are described, should be appreciated that preferred embodiment described herein only is used for description and interpretation the present invention, and be not used in qualification the present invention.
Fig. 1 illustrates the block diagram of determining the system of initial detection group according to of the present invention in double layered wireless access network.
With reference to Fig. 1, determine that according to of the present invention the system of initial detection group comprises in double layered wireless access network: at least one first kind is wireless contact 101, mutual with at least one terminal 103; The wireless contact 102 of at least one second class, mutual with at least one terminal 103; At least one wireless terminal 103 keeps being connected with the wireless contact 102 of the wireless contact 101 of the first kind and second class; And at least one communication process and control unit 104.
In addition, communication process and control unit 104 also comprise: wireless terminal position determination module 1042 is used to use the wireless contact of the first kind to determine the position of wireless terminal 103; And initial detection group determination module 1044, be used for according to the initial detection group of determining by the position of wireless terminal position determination module 1042 determined wireless terminals for the wireless contact 102 of second class.
Wherein, second class is wireless, and contact 102 is covered by the wireless contact 101 of the first kind, and perhaps there is overlapping in the overlay area of the wireless contact 102 of second class (106 among Fig. 3 to Fig. 5) with the overlay area (105 among Fig. 3 to Fig. 5) of the wireless contact 101 of the first kind.
The antenna of the first kind is wireless contact 101 and the antenna of the wireless contact 102 of second class can be a kind of in the following antenna structure: omnidirectional antenna, have antenna (as fan antenna), the array antenna of fixed-direction figure.
The second class radio node 102 sends its identifying information, and these information can be to send on broadcast channel, can be to send at the coding by pilot channel, also can be to send in the pseudo-mode with sequence that superposes.
Fig. 2 illustrates the flow chart of determining the method for initial detection group according to of the present invention in double layered wireless access network; Fig. 3 illustrates the schematic diagram of determining the method for initial detection group according to of the present invention in double layered wireless access network; And Fig. 4 illustrates the schematic diagram of determining the another kind of method of initial detection group according to of the present invention in double layered wireless access network.
Determine that according to of the present invention the method for initial detection group comprises following processing: S202 in double layered wireless access network, communication process and control unit use the wireless contact of the first kind to determine the position of wireless terminal; S204, and communication process and control unit are determined initial detection group for the wireless contact of second class according to the position of wireless terminal.
As shown in Figure 3, communication process and 104 pairs of wireless terminal geographical position of control unit determine can be by the following method one or more comprehensively realize:
First method uses the difference time of advent of terminal to position the coordinate points P of output wireless terminal 103;
Second method uses gps signal to position, the coordinate points P of output wireless terminal 103; And
The third method, the two-way time (RTT:round triptime) between use terminal and base station and the wave beam arrival direction of associated matrix array antenna estimate to obtain the coordinate points P of wireless terminal 103.
After determining the coordinate points of wireless terminal 103 by these three kinds of methods, the method of determining the wireless contact initial detection group of Microcell is that the coordinate with the estimated position P of wireless terminal is a central point, with the wireless contact of some second classes around the P of estimated position as the initial detection group element.The specific implementation step comprises: with the coordinate points of the position of determined wireless terminal as the center of circle, the wireless contact of second class is to the Euclidean distance in the center of circle around calculating, choose the second class wireless contact of the distance in the center of circle less than predetermined radii (being R among the figure), promptly, be arranged in the second class radio node of figure circle 107, as the element of initial detection group.
As shown in Figure 4, communication process and 104 pairs of wireless terminal geographical position of control unit determine also can realize by the following method: communication process and control unit 104 can use and the wireless terminal and the two-way time of base station position and combine the curve 202 that the fan antenna direction further reduces the scope to determine the position of wireless terminal.
After determining the curve of wireless terminal 103 by these three kinds of methods, be with reference to curve with the estimated position curve 202 of wireless terminal, will be positioned at this with reference to the wireless contact of some second classes of curve both sides as the initial detection group element.Concrete steps comprise: choose the wireless contact of second class from estimated position curve 202 both sides of wireless terminal and calculate its vertical (normal) distance to estimated position curve 202; The normal distance of choosing estimated position curve 202 less than the wireless contact of second class of predetermined value (being N among the figure) as the initial detection group element.
Fig. 5 is the schematic diagram that illustrates according to the transmit diversity of the double-deck mobile communication system of the embodiment of the invention.
With reference to Fig. 5, show double-deck mobile communication system with TDD mode work, comprising: several first kind are wireless contact 101, the first kind here is wireless, and contact 101 has adopted array antenna, and this array antenna can be worked in the mode of wave beam forming; The wireless contact 102 of several second classes, what second class here is wireless contact adopted is omnidirectional antenna; Several wireless terminals 103, this terminal both can be surveyed measuring of the concentrated wireless contact of the first kind to switching, also can utilize this terminal to the measurement capability of switching the concentrated wireless contact of the first kind of detection being realized the measurement of the wireless contact of second class that detection is concentrated to transmit diversity; Corresponding communication process of each first kind is wireless contact and control unit 104, communication process and control unit 104 also are used for transmit diversity and or receive diversity control except realizing the wireless contact of the first kind, the needed Base-Band Processing function of the wireless contact of second class.
Between the wireless contact according to shared common wireless interface standard (Common PublicRadio Interface, be called for short CPRI) the standard design, can realize easily between each wireless contact (being wireless device control (RE) node in the CPRI standard) synchronously, transfer of data, mode of operation control.Here, the wireless contact 101 of the first kind also adopts shared common wireless interface standard CPRI to realize with the link of baseband processing unit.
In the described two-layer system of present embodiment, some first kind are wireless, and contact 101 constitutes the ground floor covering, in the zone that each first kind node covers, the second layer that the wireless contact 102 of second class that exists plurality of continuous to cover, the wireless contact of these second classes constitute double-deck mobile communication system covers.
A portable terminal 103 is after A place in position is linked into the wireless contact 101 of the first kind, communication process and control unit 104 obtain the positional information of portable terminal 103 by the wireless contact of the first kind, what adopted here is the coordinate of the location estimation A that obtains of RTT measures and arrival direction (DOA) measurement combines mode, communication process and control unit 104 are the center with location estimation position A, R is that the element that radius selects initial detection group is: wireless contact 102h, wireless contact 102i, wireless contact 102j.Communication process and control unit 104 send to portable terminal 103 with the distinguished symbol of these three wireless contacts, portable terminal 103 reports communication process and control unit 104 after the signal interference ratio of these three wireless contacts is surveyed, and communication process and control unit 104 are therefrom selected signal interference ratio and surpassed the wireless contact 102i of predetermined threshold and wireless contact 102j and be used for transmit diversity to wireless terminal.
When wireless terminal moves to B place, position, the detection collection that goes out according to the coordinate Calculation of the position center of gravity of the wireless contact of second class comprises: the second class contactless 102k, 102l, and, the signal interference ratio of the second class contactless 102k, 102l has all reached the thresholding as active set, so communication process and control unit 104 use these two wireless contacts of 102k, 102l to realize the diversity of wireless terminal 103 is launched.
In the present embodiment, the wireless contact of described second class utilizes the site resource of Personal Handyphone System (PHS:PersonalHandy-phone System) to install, and the site resource of utilization comprises following one or more: site, base station, power supply subsystem, wire link, optical fiber contact.
The given method of determining the initial detection group of Microcell WAP (wireless access point) under the Access Network framework that the bilayer of being made up of macrocell and Microcell covers of the present invention can make wireless terminal insert Microcell fast, has improved the enforcement speed of layer-specific access net to diversity emission and diversity reception.
Be the preferred embodiments of the present invention only below, be not limited to the present invention, for a person skilled in the art, the present invention can have various changes and variation.Within the spirit and principles in the present invention all, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. system that in double layered wireless access network, determines initial detection group, comprise the wireless contact of at least one first kind, the wireless contact of at least one second class, at least one wireless terminal and at least one communication process and control unit, it is characterized in that, described terminal and the wireless contact of the described first kind and the wireless contact of described second class are mutual, and described communication process and control unit also comprise:
The wireless terminal position determination module is used to use the wireless contact of the described first kind to determine the position of described wireless terminal; And
The initial detection group determination module is used for according to the initial detection group of being determined by the position of the determined described wireless terminal of described wireless terminal position determination module for the wireless contact of described second class.
2. system according to claim 1 is characterized in that, the wireless contact of described second class is covered by the wireless contact of the described first kind, and there are overlapping in the overlay area of the wireless contact of perhaps described second class and the overlay area of the wireless contact of the described first kind.
3. method of determining initial detection group in double layered wireless access network is characterized in that described method comprises following processing:
Communication process and control unit use the wireless contact of the first kind to determine the position of wireless terminal; And
Described communication process and control unit are according to the definite initial detection group for the wireless contact of second class in the position of described wireless terminal.
4. method according to claim 3 is characterized in that, described communication process and control unit use the time of advent difference of described wireless terminal to position to determine the coordinate points of the position of described wireless terminal.
5. method according to claim 3 is characterized in that, described communication process and control unit use global positioning system signal to position to determine the coordinate points of the position of described wireless terminal.
6. method according to claim 3 is characterized in that, described communication process and control unit use the wave beam arrival direction of two-way time of described wireless terminal and base station and associated matrix array antenna to determine the coordinate points of the position of described wireless terminal.
7. according to any described method in the claim 4 to 6, it is characterized in that, determine that the method for described initial detection group comprises following processing:
With the coordinate points of the position of determined described wireless terminal as the center of circle, the wireless contact of second class is to the Euclidean distance in the described center of circle around calculating, and the distance of choosing the described center of circle then is less than the wireless contact of second class of the predetermined radii element as described initial detection group.
8. method according to claim 3, it is characterized in that described communication process and control unit use and the described wireless terminal and the two-way time of base station position and combine the curve that the fan antenna direction further reduces the scope to determine the position of described wireless terminal.
9. method according to claim 8 is characterized in that, determines that the method for described initial detection group comprises following processing:
As the reference curve, the wireless contact of second class is to the vertical range of described curve around calculating with the curve of the position of determined described wireless terminal; And
The vertical range of choosing described curve is less than the wireless contact of second class of the predetermined value element as described initial detection group.
10. method according to claim 3, it is characterized in that, also comprise following processing after determining described initial detection group: described communication process and control unit are measured and reported to described wireless terminal periodically to the signal interference ratio of the wireless contact of second class in the described initial detection group, and described communication process and control unit upgrade described detection collection according to the change dynamics ground of described signal interference ratio.
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| CN2007101804005A CN101420725B (en) | 2007-10-22 | 2007-10-22 | System and method for determining initial detection group in double layered wireless access network |
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| CN2007101804005A CN101420725B (en) | 2007-10-22 | 2007-10-22 | System and method for determining initial detection group in double layered wireless access network |
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| CN101420725A true CN101420725A (en) | 2009-04-29 |
| CN101420725B CN101420725B (en) | 2011-07-13 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011137778A1 (en) * | 2010-09-21 | 2011-11-10 | 华为技术有限公司 | Data transmission method and system |
| CN105813091A (en) * | 2014-12-30 | 2016-07-27 | 中国电信股份有限公司 | Information transceiving method and system, virtual macro base station control device and micro base station |
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2007
- 2007-10-22 CN CN2007101804005A patent/CN101420725B/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011137778A1 (en) * | 2010-09-21 | 2011-11-10 | 华为技术有限公司 | Data transmission method and system |
| US9020438B2 (en) | 2010-09-21 | 2015-04-28 | Huawei Technologies Co., Ltd. | Data transmission method and system |
| CN105813091A (en) * | 2014-12-30 | 2016-07-27 | 中国电信股份有限公司 | Information transceiving method and system, virtual macro base station control device and micro base station |
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| CN101420725B (en) | 2011-07-13 |
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Granted publication date: 20110713 Termination date: 20171022 |