WO1996037084A1 - Multiband mobile telephone system - Google Patents
Multiband mobile telephone system Download PDFInfo
- Publication number
- WO1996037084A1 WO1996037084A1 PCT/FI1996/000272 FI9600272W WO9637084A1 WO 1996037084 A1 WO1996037084 A1 WO 1996037084A1 FI 9600272 W FI9600272 W FI 9600272W WO 9637084 A1 WO9637084 A1 WO 9637084A1
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- Prior art keywords
- band
- frequencies
- mobile station
- network
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- Prior art date
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- 238000005259 measurement Methods 0.000 claims description 32
- 230000001413 cellular effect Effects 0.000 claims description 4
- 230000015572 biosynthetic process Effects 0.000 claims description 2
- 238000010295 mobile communication Methods 0.000 abstract description 2
- 230000008859 change Effects 0.000 description 7
- 210000000941 bile Anatomy 0.000 description 6
- 238000000034 method Methods 0.000 description 5
- 230000004913 activation Effects 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 4
- 238000012546 transfer Methods 0.000 description 3
- 238000004891 communication Methods 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 229920000136 polysorbate Polymers 0.000 description 2
- 230000011664 signaling Effects 0.000 description 2
- 230000008901 benefit Effects 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 230000007480 spreading Effects 0.000 description 1
Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/0005—Control or signalling for completing the hand-off
- H04W36/0055—Transmission or use of information for re-establishing the radio link
- H04W36/0066—Transmission or use of information for re-establishing the radio link of control information between different types of networks in order to establish a new radio link in the target network
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/0005—Control or signalling for completing the hand-off
- H04W36/0055—Transmission or use of information for re-establishing the radio link
- H04W36/0058—Transmission of hand-off measurement information, e.g. measurement reports
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/0005—Control or signalling for completing the hand-off
- H04W36/0083—Determination of parameters used for hand-off, e.g. generation or modification of neighbour cell lists
- H04W36/0085—Hand-off measurements
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/0005—Control or signalling for completing the hand-off
- H04W36/0083—Determination of parameters used for hand-off, e.g. generation or modification of neighbour cell lists
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/0005—Control or signalling for completing the hand-off
- H04W36/0083—Determination of parameters used for hand-off, e.g. generation or modification of neighbour cell lists
- H04W36/0085—Hand-off measurements
- H04W36/0088—Scheduling hand-off measurements
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/24—Reselection being triggered by specific parameters
- H04W36/30—Reselection being triggered by specific parameters by measured or perceived connection quality data
- H04W36/304—Reselection being triggered by specific parameters by measured or perceived connection quality data due to measured or perceived resources with higher communication quality
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
- H04W88/02—Terminal devices
- H04W88/06—Terminal devices adapted for operation in multiple networks or having at least two operational modes, e.g. multi-mode terminals
Definitions
- the invention relates to a cellular mobile tele ⁇ phone network with at least two frequency bands and in which at least some mobile stations may use whichever fre ⁇ quency band for communication, and in which the control channel associated with a traffic channel may be dedicated so that the network may send control information individually to the mobile station.
- a frequency band in a GSM mobile communications network comprises two sub- bands 25 MHz wide each, with frequency ranges 890-915 MHz in the uplink direction, i.e. from the mobile station to the base station, and 935-960 MHz in the downlink direc- tion, i.e. from the base station to the mobile station. While the GSM network specification was being drawn up, another band with a higher frequency was also included therein.
- DCS Digital Cellular System
- GSM Global System for Mobile Communications
- the systems are essentially similar, e.g. the air interface is the same.
- the GSM network is in some coun ⁇ tries, especially in urban areas with high traffic dens ⁇ ity, on the upper limits of its capacity, and hence the GSM band frequencies available to the operator are no longer sufficient to ensure service to all subscribers.
- Channel capacity has been increased by spreading the fre ⁇ quency band, so-called extended-GSM, but decisively more capacity will be obtained by taking into use another fre ⁇ quency band, i.e. transfer to multiband operation. This provides additional capacity to sites with high traffic density where the GSM band frequencies available to the operator no longer suffice to ensure service to all sub ⁇ scribers.
- Both GSM and DCS frequency bands may be used either in separate networks or as a combined network under common network control. In the latter case, mobile sta ⁇ tions able to operate on both frequency bands may be used. Such mobile stations are called multiband mobile ter ⁇ minals. Multiband mobile terminals are of two types. A mobile terminal of the first type meets the re ⁇ quirements specified for both bands and may thus operate e.g. on either a GSM or a DCS band by registering into the respective network. This type of mobile station does not, however, support handover between bands of operation, channel assignment, cell selection or cell re-selection between the bands of operation. The mobile station does not therefore require any network support to work on more than one band, and it uses the channels of that particular band only.
- a mobile terminal of the second type continuously uses the channels of both bands, and hence not only meets the requirements specified for both bands, but some addi ⁇ tional requirements, too.
- the additional features compared with a mobile station of the first type are that it is able to perform handover, channel assignment, cell selec ⁇ tion and cell re-selection between the bands of operation.
- the network has to support these operations.
- the network supports mobile stations of the second type, i.e. telephones that are able to operate on both bands .
- the coverage areas of both GSM and DCS networks are at least partially overlapping.
- a feature typical of a multiband mobile terminal of the second type, later referred to as a multiband rao- bile station, is the above mentioned capability for hand ⁇ over from a frequency band to another.
- a criterion for handover may be better audibility on a channel of another band or the tendency of the network to decrease the traf ⁇ fic load on a certain band.
- a multiband mobile station In order to be able to perform handover well, a multiband mobile station must be able to measure also frequencies of an adjacent band and send the measurement results to the network.
- a traffic channel TCH which may be full rate TCH/F, half rate TCH/H or still slower TCH/8, is always assigned together with a slow associated control channel SACCH.
- a slow TCH/8 channel with its associated SACCH channel is called an SDCCH channel (Standalone Dedicated Control Channel) .
- the control channel is in a way "inside" the traffic channel: e.g. the multiframe of a full rate traffic channel comprises timeslots of the same timeslot number of 26 successive frames.
- a cycle of 26 timeslots comprises 24 timeslots in which a TCH burst (a speech burst) is sent, one timeslot in which an SACCH burst is sent, and one timeslot in which nothing is sent.
- a mobile station uses the slow SACCH control channel to transmit various measurement results to the base station.
- the base station sends commands associated with power con ⁇ trol and timing advance on the control channel to the mobile station.
- the base station sends gen ⁇ eral information associated with the network, so-called system_info messages, e.g. system_info 5 and 5bis. This information contains a list of adjacent cell frequencies to be monitored, a base station identifier BSIC, BCCH fre- quency information, parameters associated with controlling a disturbance in a radio connection, etc.
- system_infos 2/5 and 2bis/5bis in ⁇ form a mobile station of the adjacent cell frequencies.
- the information is an index group, in which each index corresponds to a certain frequency.
- the index group also indicates to which band a frequency belongs, as the group may contain frequencies on both GSM and DCS bands.
- the system infos sent on the SACCH channel are TRX-specific, i.e. not call-specific, and the network may change the system infos TRX-specifically by an SACCH Filling message.
- An amendment specifying the transmission of SACCH System Info call-specifically has been suggested as a common en ⁇ hancement to the present GSM specification 08.58.
- the mobile station and the base station have to measure the strength of the received signal and, in addi ⁇ tion, the mobile station must measure the strength of the BCCH carrier wave of the adjacent base stations given on the list of adjacent base stations to be monitored re- ceived from the network.
- the mobile station reports on the six adja ⁇ cent cells having the best audibility.
- the quality of a received signal is measured by calculating the bit error ratio.
- a mobile station must report its measurement res- ults to its own base station. In the GSM system it reports them on a slow control channel SACCH. If the SACCH channel is not used for any other purpose than reporting, the mobile station may report the measurement results twice a second.
- a measuring and reporting cycle comprises four multiframes (1 multiframe equals 26 traffic frames) , and so the results are transmitted at intervals of 480 ms.
- the network uses the measurement results for the power control of not only its own transmitter but also that of the mobile station, for giving timing advance to the mobile station and for handover purposes.
- handover criteria include deterioration in the quality of the radio connection between the base station and the mo ⁇ bile station, indicated by an increasing bit error ratio, secondly, information received from the monitoring of the adjacent base stations stating that the radio path to a neighbour is better than that to the present base station, and thirdly, traffic load calculated by the network, in ⁇ dicating that it would be advantageous to transfer traffic to another base station from the presently extremely loaded base station.
- the network wishes to decrease the traffic load of a band by transferring the traffic of a mobile station to another band, handover between bands would be impossible in this case, as the network has no knowledge of the channels of the other band.
- the DCS band this is not neces- sarily a major drawback as more frequencies are in use than on a GSM band.
- the problem is that the network should always receive measurement results from both bands when the frequencies of the bands are audible.
- a mobile station would report on at least one frequency of the other band that it has measured, prefer ⁇ ably the best audible frequency.
- Another suggested solution complementary to the above, is that the contents of the information messages system_info 5 and 5bis, transmitted on the SACCH channel and known from the GSM network, are chosen so as to achieve a crude adjustment of the number of frequencies to be reported of the adjacent band.
- the network could, for example omit from the information messages the frequencies that are on the same band on which the mobile station is operating at that time. In this way, by using handover, the network could force the mobile station to move to an ⁇ other band.
- a drawback of this solution is that it does not allow flexible adjustment of the number of frequencies to be reported of the adjacent band, as upon giving the information message, the network cannot know which fre ⁇ quencies are best audible to the mobile station.
- the proposed solution is applicable to one special case only.
- the international patent application PCT-94/05130 discloses a method of rearranging channels .
- the method is applied to a cellular system with two or more channel groups.
- the first channel group may include TDMA channels and the second channel group CDMA channels.
- a multi-mode telephone can operate in both systems. When setting up a call, the network determines the current capacity of both groups.
- a multi-mode telephone is assigned a traffic chan ⁇ nel on the frequency of the group with the highest capa ⁇ city.
- a multi-mode telephone operating on the frequency of another channel group may also be handed over from one group to another, i.e. handover is performed and thus free group frequencies for single-mode telephones.
- a mobile station may be handed over to a channel with the least in ⁇ terference or it may be handed over to a randomly chosen free channel in another group.
- the net ⁇ work performs all handover-associated operations.
- the ap ⁇ plication does not state which measurements the multi-mode mobile station may perform, or which operations are re- quired thereof for successful handover.
- the aim of this invention is a mobile communica ⁇ tion system using two or more frequency ranges without the above drawbacks .
- a prerequisite for a mobile communica ⁇ tions system to which the invention is applied is that call-specific control information can be sent.
- the aim is a system that will allow reception of information needed for handover between bands from both bands, and especially a system that will allow a flexible change in the number of frequencies to be monitored during the con- nection.
- the system must allow flawless operation of mo ⁇ bile stations operating on one band and mobile stations operating on two bands but incapable of handover therebe ⁇ tween.
- the bands may be a 900 MHz range band and a 1800 MHz range band defined in the GSM specifications.
- the air in ⁇ terface conforms to the GSM system and call-specific SACCH information is sent as described in a proposal for an amendment to GSM specification 08.58.
- the number data may also be absolute, so that the measurement report should contain exactly the number of frequencies given therein.
- the mobile station places in the measurement report a number of meas ⁇ urement results, given in the number data, for the fre- quencies with the highest audibility from at least one band outside the current band of operation. Measurement results for the frequencies with the highest audibility of the current band of operation are placed in the remaining space in the measurement report. If the measurement res- ults of the current band of operation are fewer than the remaining space, more measurement results for frequencies outside the current band of operation are placed in the remaining space.
- the network sends on a control channel SACCH associated with the traffic channel to the mobile station not only information on the frequencies of the other band to be monitored, but also call-specific information on how many monitored adjacent band frequencies the mobile station should report. Measurement results of the adjacent band frequencies have to be sent irrespective of how well the monitored frequencies are audible compared with the fre ⁇ quencies of the serving band.
- the telephone attempts to include in its measurement report a number of adjacent band frequencies given by the network. However, if the number of sufficiently well audible adjacent band fre ⁇ quencies is less than the number given by the network, fewer adjacent band frequencies may be included in the measurement report . The same is true if the frequencies of the serving band are not audible, in which case the tele- phone may include in the measurement report more adjacent band frequencies than the number given by the network.
- the number of adjacent band frequencies to be re ⁇ ported is not constant, but the network may change it as needed.
- the number is affected by, e.g. the current traf ⁇ fic density of the network both on the serving and on the adjacent bands, time of day, or a corresponding quantity.
- the number also sets a limit on the minimum number of fre ⁇ quencies of the serving band to be reported when they are sufficiently audible.
- Figure 2 shows the contents of a sys_info modify message and Figure 3 shows the contents of a System_Info
- a mo ⁇ bile station is registered in a network and is idle.
- a call-specific control channel SACCH for signal ⁇ ling is also connected with the assigned traffic channel TCH or SDCCH, as is described in a proposal for an amend- ment to GSM specification 08.58.
- the mobile station moves from idle mode to signalling on a call-specific control channel .
- the mo- bile station informs the network of its ability to support multiband operation by sending e.g. a "Classmark Change" message.
- This known message includes information CM3 (Classmark Information 3) containing multiband information associated with the mobile station.
- CM3 Classmark Information 3
- the base station controller BSC decides to send on a call-specific SACCH channel SACCH information tailored for this particular mobile station, by using an SACCH Info_Modify message known per se.
- the message con ⁇ tains a System_Info5 message to be sent to the mobile sta- tion, and System_Info5bis and System_Info5ter messages, which are sent optionally.
- System_Info5 is always sent on an SACCH channel, if needed, System_Info5bis, and Sys- tem_Info5ter may additionally be sent to a multiband mo ⁇ bile station.
- it is advant ⁇ ageous to include in this System_Info5ter message, known per se, information about which adjacent band frequencies the mobile station has to monitor and how many frequencies have to be reported to the network.
- the message does not have to be sent if the location cell of the mobile station has no adjacent cells from another band.
- the message may also include frequencies from the current band of opera ⁇ tion, but it is preferable to place the frequency mon ⁇ itoring information on this band in the messages Sys- tem__Info5 or System_Info5bis.
- the number data sent in the System_Info5ter mess ⁇ age may alternatively be sent later.
- the mobile telephone ex ⁇ change requires in a message 'Assignment Request' of the BSC (Base Station Controller) that it activates a radio channel and as a response to the message the base station controller sends a 'Channel Activation' message to the base station BTS.
- the information element 'SACCH Info' presented in the proposed amendments to the GSM specifica- tions may be included in the activation message. If this element has been added to the message, the System_Info message in the element replaces the corresponding earlier message and it is used while the traffic channel is maintained.
- data may be trans ⁇ mitted to a mobile station in at least three different ways, that is, in the stages shown in Fig 1, presented by the circled numbers 1, 2 and 3.
- the SACCH channel may be tailored even after handover.
- the same base station to whom the Assignment Request message was addressed also ac ⁇ tivates the new traffic channel and tailors the SACCH by means of e.g. a Channel Activation message or an SACCH Mode_Modify message.
- a CM3 Classmark Information 3
- the base station controller may include a SACCH_Info field in the Channel Activation mess ⁇ age or it may activate the channel first and change the contents of SACCH by an SACCH Info_Modify message.
- Fig 2 shows the fields of a known dedicated
- SACCH_Info_Modify message The fields 'message separator', 'signal type', 'channel number' and 'System Info type' are obligatory, whereas the field containing actual sys- tem_info and the field 'start time' are optional. The latter field states when the next data transmission starts and when it ends.
- Fig 3 shows the contents of a possible Sys- tem_Information 5ter message with space for data transmis ⁇ sion according to the invention.
- the message includes a field 'extended BCCH frequency list' and the list contains the indices of the frequencies that the mobile station has to monitor.
- the frequencies given in the list may be fre ⁇ quencies of both a GSM and a DCS band.
- the message also comprises a half octet long field 'number of frequencies of an adjacent band to be reported' , where the bits con ⁇ trolling the reporting of the mobile station in a way de ⁇ scribed below are placed. This field replaces the field 'skip indicator' in the known 5ter message.
- bits 00 state that among six frequencies to be reported must be 1 adjacent band frequency
- bits 01 require that 2 adjacent band frequencies are reported
- bits 10 require that three
- correspondingly bits 11 that four adjacent band frequencies are reported.
- a multiband mobile station has received on a dedicated channel in the field 'extended BCCH frequency list' of the SACCH message 'System_Information 5ter' a frequency list, e.g. 20 fre ⁇ quencies. Frequencies are from both the serving band and an adjacent band.
- the assigned TCH channel belongs to a 900 MHz band in the GSM system and that indices 1-10 of the frequencies on the frequency list are frequencies of this band and frequency indices 101-110 are frequencies of a GSM 1800 MHz band (DCS band) .
- the mobile station knows to which band each index belongs and which frequency corresponds to the index, so it is capable of measuring all given frequencies.
- the measured signal strengths are in the order from the strongest to the weakest : 1, 2, 3, 4, 5, 101, 6, 7, 8, 9, 10, 102, 103, 104, 105, 106, 107, 108, 109, 110.
- the mobile station would report on an uplink SACCH channel to the base sta ⁇ tion the six best audible frequencies, i.e. frequencies 1, 2, 3, 4, 5, 101, which all, except frequency 101, would be GSM band frequencies. Frequency information on an adjacent DCS band may be too scarce for handover between bands.
- the field 'num ⁇ ber of adjacent band frequencies to be reported' in the system_info 5ter message contains information on the num ⁇ ber of adjacent band frequencies that the mobile station has to report on. If the information given requires that a report be given on three adjacent band frequencies, the list of the six frequencies to be reported would be as follows:
- This frequency information is sufficient for handover be ⁇ tween bands.
- the base station has to send to the mobile station a new system_info 5ter message.
- the base station controller sends to the base station a ' SACCH_Info_Modify' message, known per se, Fig 1.
- the base station controller notifies the base sta ⁇ tion that the information sent on the control channel is changed and more exactly, which System_Info messages have to be sent.
- the base station controller changes the 'Sys- tem_Information 5ter' message to be sent so that the in- formation on the number of adjacent band frequencies to be notified in the field 'number of adjacent band frequencies to be reported' is changed.
- Said information may require that the mobile sta ⁇ tion report on, e.g. five adjacent band frequencies, in which case the list of frequencies to be reported would be 1, 101, 102, 103, 104, 105.
- the mobile station Having measured the strength of the frequencies notified and chosen the frequencies to be reported in a manner of the invention, the mobile station notifies them to the network in a measurement report sent on an uplink control channel SACCH in a known manner.
- the contents of the report are described in GSM specification 04.08.
- the network sends on a dedicated control channel SACCH modifiable information on how many adjacent band frequencies the mobile station has to report on. Because of the changeability, the number of adjacent band frequencies to be reported may be flexibly adjusted at all times, for example in a particular area according to traffic density, time of day or another quantity.
- the described procedure is favourable as is does not limit the number of frequencies to be monitored, no ⁇ tified to the mobile station in the system_info 5, 5bis and 5ter messages, and therefore the mobile station inde- pendently chooses the frequencies with the best audibility at each moment from both bands.
- the network receives information on both frequency bands and may transfer the mobile station to another band when needed.
- the information on the number of adjacent band frequencies to be reported is placed in an existing field of a System_Info message. A new field may equally well be added to the message for transmission of the number data. It is also possible to create a completely new System-Info type of message to be transmitted on the control channel to transmit the number data to the mobile station.
- a requirement set on the network is the capabilities ⁇ ity of performing handover between bands when needed on the basis of the reports from the mobile station even when the frequencies the other band are not the best audible, 15 but are adequately audible. This places special require ⁇ ments on the handover algorithm.
- An advantage of the invention is that the sys- tem_info 5ter message and the therein included number of adjacent band frequencies to be reported is transmitted to a multiband mobile station only, and therefore the embodi ⁇ ment does not cause compatibility problems with mobile stations operating on one band.
- the radio system is a time division multiple access (TDMA) system.
- TDMA time division multiple access
- CDMA code division multiple access
- FDMA frequency division multiple access
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- Computer Networks & Wireless Communication (AREA)
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- Input Circuits Of Receivers And Coupling Of Receivers And Audio Equipment (AREA)
- Telephone Set Structure (AREA)
Abstract
Description
Claims
Priority Applications (8)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP53458996A JP3752511B2 (en) | 1995-05-16 | 1996-05-15 | Multi-band mobile phone system |
AT96914224T ATE245331T1 (en) | 1995-05-16 | 1996-05-15 | MULTI-BAND MOBILE PHONE SYSTEM |
EP96914224A EP0771514B1 (en) | 1995-05-16 | 1996-05-15 | Multiband mobile telephone system |
CA2194542A CA2194542C (en) | 1995-05-16 | 1996-05-15 | Multiband mobile telephone system |
DE69629086T DE69629086T2 (en) | 1995-05-16 | 1996-05-15 | MORE BAND MOBILE PHONE SYSTEM |
US08/776,279 US5960354A (en) | 1995-05-16 | 1996-05-15 | Multiband mobile telephone system |
AU57653/96A AU706206B2 (en) | 1995-05-16 | 1996-05-15 | Multiband mobile telephone system |
HK98112483A HK1011482A1 (en) | 1995-05-16 | 1998-11-30 | Multiband mobile telephone system |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FI952382 | 1995-05-16 | ||
FI952382A FI112303B (en) | 1995-05-16 | 1995-05-16 | Multiband Mobile Phone System |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1996037084A1 true WO1996037084A1 (en) | 1996-11-21 |
Family
ID=8543427
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/FI1996/000272 WO1996037084A1 (en) | 1995-05-16 | 1996-05-15 | Multiband mobile telephone system |
Country Status (13)
Country | Link |
---|---|
US (1) | US5960354A (en) |
EP (2) | EP0771514B1 (en) |
JP (1) | JP3752511B2 (en) |
KR (1) | KR100412073B1 (en) |
CN (1) | CN1094024C (en) |
AT (2) | ATE360341T1 (en) |
AU (1) | AU706206B2 (en) |
CA (1) | CA2194542C (en) |
DE (2) | DE69629086T2 (en) |
ES (2) | ES2283714T3 (en) |
FI (1) | FI112303B (en) |
HK (1) | HK1011482A1 (en) |
WO (1) | WO1996037084A1 (en) |
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WO2000016578A1 (en) * | 1998-09-10 | 2000-03-23 | Nokia Networks Oy | Method and system for channel allocation in dual band network |
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WO2008053302A2 (en) * | 2006-10-30 | 2008-05-08 | Nokia Corporation | Apparatus, method and computer program product providing extended measurement control signal for handoff measurement under interference coordination |
WO2008098223A2 (en) * | 2007-02-09 | 2008-08-14 | Qualcomm Incorporated | Flexible channel quality indicator reporting |
DE19882540B3 (en) * | 1997-07-24 | 2013-04-18 | Telefonaktiebolaget Lm Ericsson (Publ) | Method and system for radio frequency measurement and automatic frequency planning in a cellular radio system |
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JP2017530602A (en) * | 2014-09-26 | 2017-10-12 | インテル アイピー コーポレーション | Increased carrier monitoring |
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US5995834A (en) * | 1996-12-24 | 1999-11-30 | At&T Wireless Services, Inc. | Method for controlling channel re-selection from a selected control channel to an alternative control channel |
FI105309B (en) * | 1997-06-24 | 2000-07-14 | Nokia Mobile Phones Ltd | Mobile communication systems |
US6055431A (en) * | 1997-12-19 | 2000-04-25 | The Aerospace Corporation | Adaptive control of multiple beam communication transponders |
US6134427A (en) * | 1998-09-30 | 2000-10-17 | Conexant Systems, Inc. | Using a single low-noise amplifier in a multi-band wireless station |
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Also Published As
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ATE360341T1 (en) | 2007-05-15 |
FI952382A0 (en) | 1995-05-16 |
AU5765396A (en) | 1996-11-29 |
EP1377102B1 (en) | 2007-04-18 |
JP3752511B2 (en) | 2006-03-08 |
CN1154197A (en) | 1997-07-09 |
EP1377102A3 (en) | 2004-03-17 |
FI112303B (en) | 2003-11-14 |
AU706206B2 (en) | 1999-06-10 |
JPH10503356A (en) | 1998-03-24 |
DE69637034T2 (en) | 2007-12-27 |
ES2203693T3 (en) | 2004-04-16 |
EP0771514A1 (en) | 1997-05-07 |
CA2194542A1 (en) | 1996-11-21 |
CA2194542C (en) | 2010-09-28 |
US5960354A (en) | 1999-09-28 |
CN1094024C (en) | 2002-11-06 |
DE69629086T2 (en) | 2004-04-15 |
EP1377102A2 (en) | 2004-01-02 |
EP0771514B1 (en) | 2003-07-16 |
HK1011482A1 (en) | 1999-07-09 |
ATE245331T1 (en) | 2003-08-15 |
ES2283714T3 (en) | 2007-11-01 |
DE69629086D1 (en) | 2003-08-21 |
DE69637034D1 (en) | 2007-05-31 |
FI952382A (en) | 1996-11-17 |
KR100412073B1 (en) | 2004-04-13 |
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