CN1253703A - Channel selection method in GSM/DCS-based cellular radio network - Google Patents
Channel selection method in GSM/DCS-based cellular radio network Download PDFInfo
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- CN1253703A CN1253703A CN98804459.5A CN98804459A CN1253703A CN 1253703 A CN1253703 A CN 1253703A CN 98804459 A CN98804459 A CN 98804459A CN 1253703 A CN1253703 A CN 1253703A
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- H04—ELECTRIC COMMUNICATION TECHNIQUE
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- H04W72/50—Allocation or scheduling criteria for wireless resources
- H04W72/54—Allocation or scheduling criteria for wireless resources based on quality criteria
- H04W72/541—Allocation or scheduling criteria for wireless resources based on quality criteria using the level of interference
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Abstract
The invention relates to a selection of a physical channel in a GSM/DCS-based cellular radio network. More specifically, the invention relates to a selection of a fixed physical control channel and to a selection of a physical traffic channel. The base station (100) comprises a list of physical channels allowed for said base station (100). In the method, interference levels of allowed physical channels are measured and the physical channels to be used for a radio link (108) are selected on the basis of the measured interference level. A physical channel located at a distance of a fixed frequency spacing from the selected physical traffic channel downlink is selected as a physical traffic channel uplink. Or the frequency spacing between the selected physical traffic channels between downlink and uplink is of random size.
Description
Background of invention
The present invention relates to selection based on the physical channel in the cellular radio network of GSM/DCS.Relate in particular to the selection of fixing physical control channel and the selection of physical traffic channels.
Invention field
The limited radio frequency spectrum that can be used for cellular radio network is a key issue.In order to minimize the interference that is caused by co-channel signal and adjacent channel signal, people attempt carefully to distribute the use of radio frequency.The overlay area of base station is that the sub-district generally is modeled as hexagonal region.These hexagons are overlapped on the position.Is each sub-district according to dissimilar complicated model with frequency partition, and purpose is to minimize the interference that takes place in the dedicated radio link, the ability of its maximization network.In this connected, the notion of " frequency duplex factor as one " appearred.On the principle, the multiplexing factor is low more, and frequency range just is utilized more effectively.On the other hand, identical or mutually can not be too near in the multiplexer mode of a honeycomb near frequency, because too many interference will take place in that in system.
In the cellular radio network based on GSM/DCS, Frequency Distribution is manually finished.Planning one then is the most effective band utilization mode to the network operator.When planning network, at first finish the planning of frequency.In the process of being delivered for use, people have to the result of Frequency Distribution is checked by for example covering to measure in the base station of this area.This is because the modelling of the theory of radio propagation is so difficult so that only can not provide Frequency Distribution fully reliably by Theoretical Calculation and distribution.Specifically, the reflection to a radio signal that is caused by different landform and building makes and distributes the covering of a honeycomb very difficult.This network in case be delivered for use, people carry out Frequency Distribution always and measure with the area coverage of expanding this network or the capacity that improves this network.
Although artificial network's planning is very expensive with related with it measurement, also both economical up to now, because also quite low in user's popularity rate of densely populated country and urban cellular radio network.
Along with the use of mobile phone and other user terminal more and more widely, the capacity of network must improve constantly.This makes dissimilar Frequency Distribution very high with the measurement cost.
For the raising capacity, must introduce Microcell and skin sub-district.Frequency Distribution increases and becomes than more difficult in the past.Especially in office building, it is that dissimilar construction materials causes the interference to radio propagation that a problem is arranged.At this problem in the Frequency Distribution, people have developed new method.But, for the working capacity that guarantees system also needs to measure widely.On the other hand, the too high multiplexing factor of Frequency Distribution drops to cost with capacity.
Can draw a conclusion and be existing cellular radio network based on GSM/DCS and need the quite high careful Frequency Distribution of cost in order to ensure the working capacity of this system.
Description of the invention
An object of the present invention is to realize avoiding a kind of method of the problems referred to above.
This is to select the method for a physical channel to realize in based on the cellular radio network of GSM/DCS by a kind of finishing, wherein this cellular radio network comprises that at least one base station and at least one are connected to the user terminal of base station by bi-directional radio relay link, this bi-directional radio relay link is by at least one fixing physical control channel down link and at least one fixing physical control channel up link, and form by at least one physical traffic channels down link and at least one physical traffic channels up link, and logical signal is positioned on the described physical channel, the base station comprises the tabulation of a described base station available physical channel, and the interference level of available physical channel is measured and select to be used for the physical channel of radio link according to the interference level surveyed in the method.
According to first method of the present invention, it is characterized in that the physical control channel that the base station selects those conducts of channels with lowest interference level to fix from the physical channels available that it is measured.
According to second method of the present invention, it is characterized in that the physical channel that a selected physical traffic channels down link of distance has a fixing frequency interval is selected as the physical traffic channels up link.
According to the third method of the present invention, the physical traffic channels down link and the frequency interval between the physical traffic channels up link that it is characterized in that being used for radio link are sizes at random.
Another object of the present invention is a system, the cellular radio system that is used for finishing based on GSM/DCS is selected a physical channel, this cellular radio network comprises that at least one base station and at least one are connected to the user terminal of this base station by bi-directional radio relay link, this bi-directional radio relay link is by at least one fixed physical control channel down link and at least one fixing physical control channel up link, and form by at least one physical traffic channels down link and at least one physical traffic channels up link, and logic channel is positioned on the described physical channel, this base station is arranged to safeguard a tabulation of described base station available physical channel, this base station and/or user terminal are arranged to measure the interference level of physical channels available, and this base station is arranged to be used for according to the interference level selection of being surveyed the physical channel of radio link.
According to first system of the present invention, it is characterized in that this base station is arranged to select those channels with lowest interference level as fixing physical control channel from its measured physical channels available.
According to second system of the present invention, it is characterized in that this base station is arranged to select a selected physical traffic channels down link of distance fixed frequency physical channel at interval to be arranged as the physical traffic channels up link.
According to the third system of the present invention, the physical traffic channels down link and the frequency interval between the physical traffic channels up link that it is characterized in that being used for radio link are sizes at random.
Method of the present invention has realized lot of advantages.A very big advantage is to have avoided Frequency Distribution fully.Another very big advantage is to have improved network performance by the channeling efficiently that effective channel is selected to realize.Network performance also is improved because introducing Microcell and skin sub-district economically.The present invention can realize the office system based on GSM/DCS, and there is the very big market demand in this system.
System of the present invention has the advantage identical with said method.Obviously preferred embodiment and detailed embodiment can unite and be used for dissimilar combinations so that desired technique effect to be provided.
The accompanying drawing summary
Example is below with reference to accompanying drawings told about the present invention, wherein
Fig. 1 shows a cellular radio network,
Fig. 2 show a radio link physical channel and will be by the logic channel that on physical channel, moves,
Fig. 3 is the block diagram of an example of the structure of explanation base station and base station controller,
Fig. 4 is the block diagram of an example of the structure of explanation user terminal.
Detailed description of the invention
The present invention is used for all cellular radio networks based on GSM/DCS.The pan-European gsm system of representing all different development phases based on the cellular radio network of GSM/DCS, it is the stage 1,2,2+ and the DCS 800 that on the basis of gsm system, develops and DCS 1900 systems, and variously be used for further developing the project of described system and with those UMTS systems that is for example developing, be the new exploration project on basis, even they are only partly based on gsm system.In this was used, gsm system used as an example, but the present invention is not limited to this.
Fig. 1 shows an example according to the structure of a cellular radio network of the present invention.There is i.e. sub-district, a hexagonal overlay area base station 100,102.Base station 100,102 can be connected to base station controller 114 by connecting link 112.The task of base station controller 114 is operations of the several base stations 110,102 of control.Generally speaking, 116 have a connection from base station controller 114 to mobile telephone switch, from mobile telephone switch 116 and then be connected to public switched telephone network 118.In office system, base station 100, base station controller 114 even mobile telephone switch 116 can be combined in the device, and this device is connected to public switched telephone network 118, for example is connected on the telephone exchange of public switched telephone network 118.User terminal 104,106 in sub-district has bi-directional radio relay link 108,110 to be connected to the base station 100 of sub-district.In addition, network components, promptly the fixed part of cellular radio network can comprise a plurality of base stations, base station controller, the network management system of transmission system and different stage, obviously those of skill in the art know that cellular radio network also comprises a lot of other structures, does not repeat them here.
Bi-directional radio relay link 118 realizes by using physical channel, and physical channel is being that example is a time slot of 200KHz frequency band among the GSM.Fig. 2 shows radio link 108 desired channels in a simplified manner.The longitudinal axis is represented the frequency range of gsm system, and the left side of figure shows base station 100, and the right shows user terminal 104.Lower band 212 is used for up link, promptly from user terminal 104 to the base station 100 up link.In GSM, low-frequency band 212 comprises from 890 to 915MHz frequency range.Higher frequency band 210 is used for down link, i.e. 100 down links to user terminal 104 from the base station.Network operater is only handled the predetermined portions of frequency band, and for example 5MHz frequency band is divided into the carrier frequency (carrier) of 200KHz, and each generally comprises eight time slots.In this manual, time slot is called as physical channel.In voice transfer, for example, general two physical channels are used as Traffic Channel: a downlink channel 202 and a uplink channel 206.New standard according to finishing in 1997 to 1998 can carry out transfer of data or the propagation of motion video picture etc. with several physical channels simultaneously.
As shown in Figure 2, a logic business channel TCH is arranged on uplink and downlink physical traffic channels 202,206.If necessary this logic business channel TCH can be replaced by a related control channel FACCH of the high speed relevant with this Traffic Channel fully or partly.And, set up one and connect the fixing physical control channel different, fixing physical control channel 200 down links and fixing physical control channel 202 up links with during being connected, sending signal demand.Here " fixing " be meant that one is always given any individual calling (as in DECT) at identical time slot with fixing control channel and this fixed control channel not on commission (commit) that same frequency sends.This physical control channel down link is a BCCH channel of broadcast control, frequency calibration channel FCCH, synchronous channel SCH, paging channel PCH, access authorization channel AGC H, Separate Dedicated Control Channel SDCCH and slow associated control channel SACCH.This physical control channel up link is RACH RACH, Separate Dedicated Control Channel SDCCH and slow associated control channel SACCH.Further information about the structure of these channels and purpose can be from GSM specification and book " GSM introduction ", S.M.Redl, and M.KWeber, M.W.Oliphart, Artech House, London 1995, find among the ISBN 0-8900 6-785-6.
The tabulation of its available physical channel is safeguarded in base station 100.When network was paid, base station 100 was provided the tabulation that this base station 100 can be used for professional physical channel.Afterwards, when network in use the time, network operater is revised available channel list (if he or she wants to do like this) by network management system, or some network componentses are such as the base station controller 114 automatic base stations 100 that reorganize by its management, the tabulation of 102 available frequencies, but keep simultaneously parts available frequencies scope by this way by the network of network or 114 management of described base station controller.The tabulation of physical channels available can comprise the whole frequency range of distributing to the operator or have only its part alternatively.Whole network is dynamically operated under first kind of situation, thereby all operator's available physical channel are handled in each base station, and wherein best some are selected to be used in each concrete situation.According to another optional situation, the sub-fraction of the whole frequency range of this operator is handled in each base station, so the distribution that frequency is used is general more coarse.
When setting up bi-directional radio relay link, generally can be moved on the physical traffic channels of having selected 202,206 and finish in the part of the signaling of finishing on the separate physical control channel 200,204.The performance of SDCCH channel is saved and makes the Traffic Channel 202,206 of directly transferring selection when setting up radio link 108 from the RACH channel to then.Setting up link 108 these required signalings finishes on Traffic Channel 202,206 then.At all without any need for the SDCCH signal, but the FACCH signal relevant with the Traffic Channel 202,206 of link is used to send signal.The covering of Traffic Channel 202,206 can be estimated better that than the covering of control channel 200,204 because have only two sides on the Traffic Channel, and several different user terminal 104,106 can use identical control channel.
When selecting physical traffic channels up link 206, two optional methods are arranged.The physical traffic channels down link 202 and the physical traffic channels up link 206 that are used for radio link 108 can be selected respectively, if the frequency interval between them is a size at random.For example this means that a 45MHz who is used in the fixing two-way interval (fixed duplex spacing) in the GSM standard needn't be effective, but descending and reverse link traffic channel is to select in the interference little mode of trying one's best.User terminal 104 and base station 100 select to have the channel of lowest interference level then from the physical channels available of being measured by base station 100.
If use fixing two-way interval, fixed frequency of the selected physical channel downlink of distance physical channel at interval is selected as the physical channel up link.
When setting up link 108 and switching, relate to the selection problem of Traffic Channel 202,206.Switching can be that an intra-cell is changed, and promptly transfers one other channel in the same sub-district to by a physical channel, such as needs to switch owing to the described quality of channel of disturbing of increase extremely worsens.Also may be the switching between the sub-district, it means that link 108 is switched to another base station 102 from a base station 100.
User terminal is selecting Traffic Channel to use the system information of base station 100 issues at 202,206 o'clock.The system information of base station 100 issue is meant that base station 100 is distributed on information on some logical control channels with the transmission of broadcast type.This system information can change according to specific implementation.
System information comprises a tabulation of an available channel.In this connected, available channel list was used so that terminal can be selected its Traffic Channel 202,206 with aforesaid way by user terminal 104,106.
System information can comprise the type of each adjacent base station 102.The user terminal 104 of the notified type of adjacent base station 102 (for example GSM stage (phase) 1, GSM/DCS stage (phase) 2, DS (=Dynamic Selection)) helps user terminal 104 to arrange its operations.When the switching carried out to described adjacent base station 102, user terminal 104 knows whether the process of telling about among the present invention of having used.This makes foundation not only comprise according to the base station of prior art but also comprises that both networks of mixing of the base station told about among the present invention become possibility.
System information can comprise the tabulation of the channel that each adjacent base station 102 can be used.In described channel, user terminal is finished the measurement of received radio field intensity and may be carried out interferometry, prepares for possible switching like this.System information can comprise the identification data of the physical channel (comprising the BCCH channel) of each adjacent base station, frequency and time slot in for example synchronous cellular radio network.Now, user terminal 104 need not measured all channels that adjacent base station 102 is handled, but 104 measurements of user terminal comprise the wireless field density that receives on the physical channel of BCCH channel.
System information can comprise the information about the interference level of physical traffic channels up link.Like this, user terminal 104 can find the covering of described channel is how to point to base station 100; User terminal 104 uses this information when selecting its Traffic Channel in the above described manner.
System information can comprise a tabulation that has distributed physical channel.User terminal 104 with regard to notified which channel is assigned with like this.No longer need to measure the interference of these channels, but user terminal 104 these channels of mark are for distributing.
System information can comprise the quality threshold that a channel is selected.The quality threshold that channel is selected indicates the restriction of interference level, and the channel that is lower than this value can be handled, and the channel that is higher than this value comprises too many interference and can not be used for reliable business.
System information can comprise the quality threshold that switches in the honeycomb.This threshold value indicates the restriction of the interference level of a radio link, is higher than this value user terminal 104 and requires base station 100 to switch to the channel that another has better covering.System information also can comprise the border that switch a minizone.
When user terminal 104 was in active state and use discrete transmission, this user terminal 104 can be finished the needs of measurement to find that possible minizone is switched to adjacent base station 102 in the gap that it does not transmit.
When frequency hopping, user terminal 104 selects to be used for the physical channel of frequency hop sequences.Like this, method of the present invention also can play a role in the cellular radio network based on GSM/DCS that uses frequency hopping.
When user terminal 104 was selected Traffic Channel, it may ask the base station to receive the physical traffic channels of its suggestion.The identification data of user terminal 104 physical channel that it is selected with at least one on the RACH channel then sends to base station 100, and promptly it sends the identification data that at least one its hope with low interference level is used as Traffic Channel.This may occur in when setting up a connection, comprises when calling out for mobile-originated one or when calling out the calling of travelling carriage.This also may occur in the process of a calling, thereby finishes on the FACCH channel relevant with the Traffic Channel in a Geju City with the signal of a handoff association in this calling.Base station 100 sends the signal that whether receives by at least one Traffic Channel of user terminal suggestion at the AGCH channel.Use aforesaid mode, user terminal 104 may begin communication service at least one Traffic Channel of being advised immediately when user terminal 104 receives the signal of at least one Traffic Channel that acceptance advises from the base station.On this Traffic Channel, finish then with one and connect related signaling.The communication relevant with establishment of connection also may be finished in the common mode of describing in the GSM standard, and thitherto, just brings into use the Traffic Channel of suggestion.
When the Traffic Channel of base station 100 refusing user's terminals 104 suggestion, user terminal 104 some other at least one Traffic Channels of suggestion.The Traffic Channel of base station 100 possibility refusing user's terminals, 104 suggestions is if can not be used for business well inadequately from this quality of channel of angle of base station.The number of times of the Traffic Channel of base station 100 refusing user's terminals, 104 suggestions can be scheduled to.But because there are the disposal ability and the better antenna of more post-processed signal in the base station, under bad condition, channel is selected optimised at user terminal 104.Channel is selected also may fail.Must carry out a secondary channel in this case again selects.
Let us is referring to Fig. 3 of the structure that more specifically shows base station 100 and base station controller 114.Base station controller 114 is connected to base station 100.Base station controller 114 is connected to a mobile telephone switch 116.Base station controller 114, base station 100 and mobile telephone switch generally are independent device.In addition, there has been the operation of base station 100 and base station controller 114 to be incorporated into a system in the device.Mobile telephone switch 116 also can be incorporated in this device.
The task of mobile telephone switch 116 for example is: realize switching network, control is set up with discharging and is connected, and collects metering data and control echo cancellation element.
Realize that the simplest method of the present invention is that step conversion with method of the present invention is for to realize with software.Software can be placed in the memory of processor of the control of base station 100 for example and apparatus of repair parts 324 so.Control assembly 324 interference level of controlling receiver measured channel and control frame unit 312 and transmitter 322 then makes and can send logical control channel on some physical channels.On the other hand, application program can also realize by the ASIC circuit or by the independent logical that HW parts independently constitute.
Let us is referring to the Fig. 4 that shows the structure of a possible user terminal 104 with simplified way.User terminal 104 comprises 420, one control units 450 of 400, one radio units of a user part and an antenna 470.The task of user part 400 is as a user interface with user terminal 104.The task of radio unit 420 is to be sent out conversion of signals for compatible mutually with radio link 108, received signal is converted to the intelligible form of user.The task of antenna 470 is from radio link 108 received signals and sends a signal to radio link 108.User part 400 comprises 404, one keyboards 406 of 402, one displays of a loud speaker and a microphone 408.Radio unit 420 comprises 440, one control units 450 of 430, one transmitters of a receiver and a bidirectional filter (duplex filter) 460.Receiver 430 comprises a demodulator 432, decipher 434, channel decoder 436 and a source code decoder 438.Transmitter comprises 444, one channel encoders 446 of 442, one encryption equipments of a source code encoder and a modulator 448.
Comprise the modification of following ordinary construction according to the user terminal 104 of cellular radio network of the present invention: user terminal 104 is arranged to measure the interference level of physical channels available.This measurement is finished as getting off according to prior art: control unit 450 controlling receiver 430 change its frequency and measure the interference level of each available channel.And then user terminal 104 is arranged to be used for according to the interference level selection of measuring the physical channel of radio link.
For the simplest realization of the present invention, control unit 450 also needs a software except general operation, and this software can be explained the 410 modulation signalings that receive from the base station, can send signaling and can finish above-mentioned interference level measurement.Aforesaid operations also can be realized by for example ASIC circuit or by the independently logic that the HW parts are formed.
Though the example with reference to accompanying drawing has been told about the present invention, clearly the present invention is not limited to this, revises in many ways in the scope of the thinking of the present invention that it can be in appending claims.
Claims (28)
1. in based on the cellular radio network of GSM/DCS, select a kind of method of a physical channel, this cellular radio network comprises at least one base station (100), at least one is connected to the user terminal (104) of base station (100) by a bi-directional radio relay link (108), this bi-directional radio relay link (108) is by at least one fixing physical control channel down link and at least one fixing physical control channel up link, and form by at least one physical traffic channels down link and at least one physical traffic channels up link, and logic channel is positioned on the described physical channel, this base station (100) comprises a tabulation of this base station (100) available physical channel, the interference level of physical channels available is measured and select to be used for the physical channel of radio link according to the interference level of measuring in the method, is characterised in that base station (100) selects those channels with lowest interference level as fixing physical control channel from the physical channels available that its is measured.
2. according to a kind of method of claim 1, be characterised in that fixing physical channel is in the base station (100) when being delivered for use or selected when the topological structure of network changes.
3. according to a kind of method of claim 1, be characterised in that the physical channels available tabulation comprises all frequency ranges of distributing to this operator.
4. according to a kind of method of claim 1, be characterised in that the physical channels available tabulation comprises the part of the frequency range of distributing to the operator.
5. according to a kind of method of claim 1, be characterised in that base station (100) detection training sequence and select at least one not come to use to oneself and give base station controller (114) its signaling by the used training sequence of adjacent base station (102).
6. in based on the cellular radio network of GSM/DCS, select a kind of method of a physical channel, this cellular radio network comprises that at least one base station (100) and at least one are connected to the user terminal (104) of base station (100) by bi-directional radio relay link (108), this bi-directional radio relay link (108) is by at least one fixing physical control channel down link and at least one fixing physical control channel up link, and form by at least one physical traffic channels down link and at least one physical traffic channels up link, logic channel is positioned on the described physical channel, base station (100) comprises a tabulation of described base station (100) available physical channel, the interference level of physical channels available is measured and select to be used for the physical channel of radio link according to the interference level of measuring in the method, and being characterised in that apart from selected physical traffic channels down link has a certain frequency physical channel at interval selected as the physical traffic channels up link.
7. in based on the cellular radio network of GSM/DCS, select a kind of method of a physical channel, this cellular radio network comprises that at least one base station (100) and at least one are connected to the user terminal (104) of base station (100) by bi-directional radio relay link (108), bi-directional radio relay link (108) is by at least one fixing physical control channel down link and at least one fixing physical control channel up link, and form by at least one physical traffic channels down link and at least one physical traffic channels up link, and logic channel is positioned on the described physical channel, this base station (100) comprises a tabulation of described base station available physical channel, the interference level of physical channels available is measured and select to be used for the physical channel of radio link (108) according to the interference level of measuring in the method, is characterised in that the physical traffic channels down link and the frequency interval between the physical traffic channels up link that are used for radio link are sizes at random.
8. according to a kind of method of claim 6 or 7, the selection that is characterised in that physical traffic channels is to carry out when setting up a calling.
9. according to a kind of method of claim 6 or 7, the selection that is characterised in that physical traffic channels is to carry out when switching in carrying out a honeycomb.
10. according to a kind of method of claim 6 or 7, the selection that is characterised in that physical traffic channels is to carry out when carrying out switching between a honeycomb.
11., be characterised in that the system information of base station (100) issue is used for this selection according to a kind of method of claim 6 or 7.
12., be characterised in that system information comprises the tabulation of an available channel according to a kind of method of claim 11.
13., be characterised in that system information comprises the type of each adjacent base station (102) according to a kind of method of claim 11.
14., be characterised in that system information comprises the tabulation of the channel that each adjacent base station (102) is available according to a kind of method of claim 11.
15., be characterised in that system information comprises the information about the interference level of physical channel up link according to a kind of method of claim 11.
16., be characterised in that system information comprises a tabulation that has distributed physical channel according to a kind of method of claim 11.
17., be characterised in that system information comprises the quality threshold that channel is selected according to a kind of method of claim 11.
18., be characterised in that system information comprises the quality threshold of transferring in the honeycomb according to a kind of method of claim 11.
19., be characterised in that system information comprises the quality threshold that switches between a honeycomb according to a kind of method of claim 11.
20. a kind of method according to claim 6 or 7, be characterised in that when user terminal (104) is in active state and uses discontinuous transmission, user terminal (104) ends the measurement of finishing adjacent base station (102) between transmission period therein, and purpose is to find the needs that switch between possible honeycomb.
21., be characterised in that when using frequency hopping that user terminal (104) selects to be used in the physical channel in the frequency hop sequences according to a kind of method of claim 6 or 7.
22., be characterised in that user terminal (104) request base station (100) receives the physical traffic channels of its suggestion according to a kind of method of claim 6 or 7.
23. a kind of method according to claim 22, be characterised in that user terminal (104) sends at least one its physical channel of selecting on the RACH channel identification data to base station (100), base station (100) send the signal that whether receives at least one Traffic Channel that user terminal (104) advises on the AGCH channel.
24. according to a kind of method of claim 23, in case be characterised in that the Traffic Channel of base station (100) refusing user's terminal (104) suggestion, at least one Traffic Channel that user terminal (104) suggestion is other.
25., be characterised in that the Traffic Channel pre-determined number that advise with refusing user's terminal (104) only base station (100) according to a kind of method of claim 24.
26. in cellular radio system, finish the system of selecting a physical channel based on GSM/DCS, this cellular radio network comprises that at least one base station (100) and at least one are connected to the user terminal (104) of this base station by bi-directional radio relay link (108), bi-directional radio relay link (108) is by at least one fixing physical control channel down link and at least one fixing physical control channel up link, and form by at least one physical traffic channels down link and the up link of at least one physical traffic channels, and logic channel is positioned on the described physical channel, this base station (100) is arranged to safeguard two tabulations of described base station (100) available physical channel, this base station (100) and/or user terminal (104) are arranged to measure the interference level of physical channels available and the physical channel that this base station (100) are arranged to be used for according to the interference level selection of measuring radio link (108), are characterised in that base station (100) is arranged to select from the physical channels available of its measurement those channels with lowest interference level as fixing physical control channel.
27. select the system of a physical channel in based on the cellular radio system of GSM/DCS, this cellular radio network comprises that at least one base station (100) and at least one are connected to the user terminal (104) of this base station (100) by bi-directional radio relay link (108).This bi-directional radio relay link (108) is by at least one fixing physical control channel down link and at least one fixing physical control channel up link, and form by at least one physical traffic channels down link and at least one physical traffic channels up link, and logic channel is positioned on the described physical channel, this base station (100) is arranged to safeguard the tabulation of a described base station (100) available physical channel, this base station (100) or/or user terminal (104) are arranged to measure the interference level of physical channels available, this base station (100) is arranged to be used for according to the interference level selection of measuring the physical channel of radio link (108), is characterised in that base station (100) is arranged to select the physical channel of a fixing frequency interval of a selected physical traffic channels down link of distance as a up road of patrolling of physical traffic channels.
28. in based on the cellular radio system of GSM/DCS, select the system of a physical channel, this cellular radio network comprises that at least one base station (100) and at least one are connected to the user terminal (104) of this base station (100) by bi-directional radio relay link (108), this bi-directional radio relay link (108) is by at least one fixing physical control channel down link and at least one fixing physical control channel up link, and form by at least one physical traffic channels down link and at least one physical traffic channels up link, and logic channel is positioned on the described physical channel, this base station (100) is arranged to safeguard the tabulation of a described base station (100) available physical channel, this base station (100) and/or user terminal (104) are arranged to measure the interference level of physical channels available, this base station (100) is arranged to be used for according to the interference level selection of measuring the physical channel of radio link (108), is characterised in that the physical traffic channels down link and the frequency interval between the physical traffic channels up link that are used for radio link (108) are sizes at random.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FI971712A FI971712A (en) | 1997-04-22 | 1997-04-22 | Channel selection method in GSM / DCS based cellular radio network |
| FI971712 | 1997-04-22 |
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| Publication Number | Publication Date |
|---|---|
| CN1253703A true CN1253703A (en) | 2000-05-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN98804459.5A Pending CN1253703A (en) | 1997-04-22 | 1998-04-22 | Channel selection method in GSM/DCS-based cellular radio network |
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| Country | Link |
|---|---|
| EP (1) | EP0978211A2 (en) |
| JP (1) | JP2001521699A (en) |
| CN (1) | CN1253703A (en) |
| AU (1) | AU7046498A (en) |
| FI (1) | FI971712A (en) |
| NO (1) | NO995128L (en) |
| WO (1) | WO1998048586A2 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101300782B (en) * | 2005-11-02 | 2010-06-16 | 艾利森电话股份有限公司 | Radio telecommunication system |
| CN102843735A (en) * | 2011-06-21 | 2012-12-26 | 中兴通讯股份有限公司 | Cell switching method and system |
| CN102932930A (en) * | 2011-08-10 | 2013-02-13 | 华为技术有限公司 | Resource scheduling method, wireless access equipment and communication system |
| CN105075313A (en) * | 2013-02-13 | 2015-11-18 | 高通股份有限公司 | Smart WIFI access point that selects the best channel for WIFI clients having multi-radio co-existence problems |
Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6975603B1 (en) | 1999-08-20 | 2005-12-13 | Siemens Communications Inc. | System and method for minimizing the loss of information in cordless communications |
| US6418317B1 (en) | 1999-12-01 | 2002-07-09 | Telefonaktiebolaget Lm Ericsson (Publ) | Method and system for managing frequencies allocated to a base station |
| US20020052201A1 (en) * | 2000-10-31 | 2002-05-02 | Leif Wilhelmsson | Method and system for dynamic carrier selection |
| US7027418B2 (en) | 2001-01-25 | 2006-04-11 | Bandspeed, Inc. | Approach for selecting communications channels based on performance |
| JP2003070056A (en) * | 2001-08-28 | 2003-03-07 | Ntt Docomo Inc | Communication-channel setting method, communication control apparatus, and radio communication system |
| US9955438B2 (en) | 2005-09-27 | 2018-04-24 | Qualcomm Incorporated | Method and apparatus for carrier allocation and management in multi-carrier communication systems |
| US8218481B2 (en) | 2006-06-09 | 2012-07-10 | Lg Electronics Inc. | Method of transmitting data in a mobile communication system |
| US8917673B2 (en) * | 2006-07-14 | 2014-12-23 | Qualcomm Incorporation | Configurable downlink and uplink channels for improving transmission of data by switching duplex nominal frequency spacing according to conditions |
| US8724556B2 (en) * | 2007-03-19 | 2014-05-13 | Apple Inc. | Uplink control channel allocation in a communication system and communicating the allocation |
| US8447252B2 (en) | 2009-01-21 | 2013-05-21 | Bandspeed, Inc. | Adaptive channel scanning for detection and classification of RF signals |
| US8849213B2 (en) | 2009-01-21 | 2014-09-30 | Bandspeed, Inc. | Integrated circuit for signal analysis |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5044010A (en) * | 1990-03-29 | 1991-08-27 | At&T Bell Laboratories | Arrangement and method for selecting an available communication channel for a cordless telephone |
| US5197093A (en) * | 1990-04-13 | 1993-03-23 | Phonemate, Inc. | Enviromental adaptive mechanism for channel utilization in cordless telephones |
| CA2027826C (en) * | 1990-10-17 | 2000-02-15 | Leo Strawczynski | Improved call set-up in a radio communication system with dynamic channel allocation |
| CA2031551C (en) * | 1990-12-05 | 1998-06-30 | Leo Strawczynski | Inter-cell call hand-over in radio communication systems with dynamic channel allocation |
| CA2032325C (en) * | 1990-12-14 | 1998-07-07 | Leo Strawczynski | Intra-cell call hand-over in radio communication systems with dynamic channel allocation |
-
1997
- 1997-04-22 FI FI971712A patent/FI971712A/en unknown
-
1998
- 1998-04-22 EP EP98917154A patent/EP0978211A2/en not_active Withdrawn
- 1998-04-22 CN CN98804459.5A patent/CN1253703A/en active Pending
- 1998-04-22 AU AU70464/98A patent/AU7046498A/en not_active Abandoned
- 1998-04-22 WO PCT/FI1998/000356 patent/WO1998048586A2/en not_active Application Discontinuation
- 1998-04-22 JP JP54509998A patent/JP2001521699A/en active Pending
-
1999
- 1999-10-21 NO NO995128A patent/NO995128L/en not_active Application Discontinuation
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101300782B (en) * | 2005-11-02 | 2010-06-16 | 艾利森电话股份有限公司 | Radio telecommunication system |
| CN102843735A (en) * | 2011-06-21 | 2012-12-26 | 中兴通讯股份有限公司 | Cell switching method and system |
| CN102843735B (en) * | 2011-06-21 | 2018-03-23 | 中兴通讯股份有限公司 | Cell switching method and system |
| CN102932930A (en) * | 2011-08-10 | 2013-02-13 | 华为技术有限公司 | Resource scheduling method, wireless access equipment and communication system |
| WO2013020512A1 (en) * | 2011-08-10 | 2013-02-14 | 华为技术有限公司 | Resource scheduling method, wireless access equipment and communication system |
| CN102932930B (en) * | 2011-08-10 | 2015-03-18 | 华为技术有限公司 | Resource scheduling method, wireless access equipment and communication system |
| US9392611B2 (en) | 2011-08-10 | 2016-07-12 | Huawei Technologies, Co., Ltd. | Resource scheduling method, radio access device, and communications system |
| CN105075313A (en) * | 2013-02-13 | 2015-11-18 | 高通股份有限公司 | Smart WIFI access point that selects the best channel for WIFI clients having multi-radio co-existence problems |
Also Published As
| Publication number | Publication date |
|---|---|
| AU7046498A (en) | 1998-11-13 |
| NO995128L (en) | 1999-12-21 |
| NO995128D0 (en) | 1999-10-21 |
| FI971712A0 (en) | 1997-04-22 |
| JP2001521699A (en) | 2001-11-06 |
| FI971712A (en) | 1998-10-23 |
| WO1998048586A2 (en) | 1998-10-29 |
| WO1998048586A3 (en) | 1999-01-28 |
| EP0978211A2 (en) | 2000-02-09 |
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