CN101185362A - Selective network switching in a wireless broadcast network - Google Patents
Selective network switching in a wireless broadcast network Download PDFInfo
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Abstract
The disclosure is directed to a mobile communication device that may receive wireless broadcast signals from a number of different base stations or transmitters. As the location of the device moves relative to the transmitters, one transmitter will likely be identified as the transmitter broadcast the strongest, or highest quality, signal. When that determination is made, the user of the mobile device is presented the opportunity to switch to receiving that transmitters signal. Based on the user's reply, the device may remain with the current transmitter, even though it does not have the strongest signal, or the device may be configured to acquire and start receiving the new transmitter's signal. The measuring of the quality of a transmitter's signal may be based on a composite score that combines a number of individual measurements made over a predetermined period of time.
Description
Require priority according to 35U.S.C. § 119
Present patent application requires to submit and transfer its assignee to and by quoting the provisional application No.60/669 that is entitled as " TIMING RECOVERY AND NETWORK SWITCHING FOR FLO (the timing recovery and the network that are used for FLO switch) " that clearly is included in this, 555 priority on April 7th, 2005.
Technical field
The disclosure relates generally to telecommunications, relates in particular in order to support the system and method for mobile communication equipment that can be by wireless broadcast network communication.
Background technology
Wireless and cable radio network is widely used in to providing various data contents than large user's group.Common cable radio network is with the cable system of multimedia content delivery to a large amount of families.Cable system generally includes head end and publisher node.Each head end is from each provenance program receiving, is that each program generates independent modulation signal, the modulation signal of all programs is multiplexed to output signal, and its output signal is sent to publisher node.Each program can issue above wide geographic area (for example, whole state) or less geographic area (for example, city).Each publisher node covers the specific region (for example, community) in this wide geographic area.Each publisher node from the beginning termination is received output signal, and the modulation signal of the program that will issue in its overlay area is multiplexed to different frequency channels, and its output signal is sent to family in its overlay area.The output signal of each publisher node is carried the countries and regions program usually, and they are sent out being multiplexed on the modulation signal that separates of this output signal usually.
Wireless broadcast network is by the wireless device in the overlay area that data is sent to this network in the air.Yet wireless broadcast network and wired broadcasting network are all different on many key points.One of these different places are the direct results that the wireless user moves, and according to definition, wired TV user almost rests on the tip node (for example, their family or company) of cable delivery system.Because the wireless user moves, so certain situation can take place during from overlay area that another radio network is changed in the overlay area of a radio network at customer location.If these two radio networks are broadcasted identical content on identical channel, then this user can switch to another (be very similar to the honeycomb switching takes place) from a network transmitter with having no problem.Yet in many situations, adjacent radio network does not provide same program or same program is not provided on same channel.Therefore, the user being automatically switched to nearest radio network may conflict with current multimedia of appreciating of user or interaction content.Correspondingly, need and in mode that is not only effective but also client close friend the wireless user in the wireless broadcast network to be switched to another adjacent radio network.
Summary of the invention
A kind of wireless broadcast network system relate in one aspect to the method that Wireless Telecom Equipment switches between radio network.According to this method, the current broadcast signal is decoded in the middle of a plurality of broadcast singals from the respective broadcast network separately.Have the current broadcast of being higher than quality of signals mark if a signal in these a plurality of broadcast singals is determined, then the user of this equipment is inquired an above-mentioned signal that whether switches in a plurality of broadcast singals.If the user selects to switch, then this equipment begins to decode an above-mentioned signal in a plurality of broadcast singals to replace the current broadcast signal; Otherwise, continue the decoding of current broadcast signal.
A kind of Wireless Telecom Equipment relate to an equipment on the other hand, it comprises the processor that is configured to determine to have in a plurality of radio networks a network of highest mass fractions.This equipment also comprises: user interface, be configured to from the user of this equipment receive with a plurality of networks of selection an above-mentioned order that network is relevant; And receiver, by processor control and be configured to change the signal of the above-mentioned network a plurality of radio networks of decoding into from decoding current broadcast signal based on this order.
A kind of another aspect of Wireless Telecom Equipment relates to an equipment, and it comprises and is configured to the receiver of decoding to from the current demand signal of the current broadcast network in a plurality of radio networks that have corresponding signal separately.This equipment also has and is configured to determine a Signal Processing device having highest mass fractions with respect to other signal in the corresponding signal.Also have a user interface, be configured to a) user to this equipment and present and comprise about selecting an above-mentioned signal in the corresponding signal, and b for the inquiry of the inquiry of decoding) receive instruction from the user in response to this inquiry.This equipment comprises a receiver, if be configured to according to this instruction with a) this instruction instruction decoding current demand signal, even the above-mentioned signal then in the corresponding signal is not that current demand signal also continues the current demand signal of decoding, perhaps b) if the above-mentioned signal in should instruction instruction decoding corresponding signal then switches to the above-mentioned signal in the decoding corresponding signal.
It should be understood that for a person skilled in the art according to wherein only having illustrated and described the following specifically describes of each embodiment of the present invention as an illustration, other embodiments of the invention will be conspicuous.As will realizing that the present invention can have other can make amendment in other various aspects with different embodiment and its many details, and all these can not deviate from spirit of the present invention and scope.Correspondingly, accompanying drawing should be considered to illustrative rather than restrictive with specifying in itself.
Description of drawings
Show the various aspects of wireless communication system in the accompanying drawings without limitation as example, wherein:
Figure 1A is the diagrammatic sketch of two adjacent wireless broadcast networks;
Figure 1B is the diagrammatic sketch with adjacent wireless broadcast network of different local content;
Fig. 2 has described the exemplary superframe that can broadcast in the network of Figure 1A and 1B;
Fig. 3 shows the base station and the mobile device of the part of the network that is used to realize Figure 1A and 1B; And
Fig. 4 has described the flow chart of illustrative methods that mobile device switches between the different radio radio network.
Fig. 5 shows the replaceability embodiment according to the mobile device of principle of the present invention.
Embodiment
Be intended to be not intended to expression below in conjunction with specifying of setting forth of accompanying drawing and can put into practice the embodiment that only has of the present invention therein as the explanation of various embodiment of the present invention.Detail that comprises for providing thorough purpose of the present invention is provided for this.Yet the present invention can be conspicuous for those skilled in the art there not being under the situation of these details practice.In some cases, known configurations and assembly are illustrated to avoid hiding notion of the present invention with the block diagram form.
Here be described in the technology of the dissimilar transmission (for example, part and wide-area transmission) of wireless broadcast network broadcasting being used for.As used in this, " broadcasting " and " broadcasting " be meant content/transfer of data to user's group of any size and can be called as " multicast " or other term.Wide-area transmission is can be by all the perhaps transmission of multi-transmitter broadcasting in this network.Local transmission is the transmission that can be broadcasted by the subclass of the transmitter that is used for given wide-area transmission.Different local transmission can be broadcasted by the different subclass of the transmitter that is used for given wide-area transmission.Different wide-area transmission also can be broadcasted by emission units different in this network.Wide area and local transmission transmit different content usually, but these transmission also can transmit identical content.
An example of this radio network is to send the QUALCOMM MediaFLO of program set with the bit rate of the every Hz2 bit of about per second
TMEmployed this technology is to be particularly designed for to the wireless subscriber cost a large amount of air interface based on OFDM (OFDM) of abundant content of multimedia of multileaving effectively.Thereby it has utilized the multicasting technology in the Single Frequency Network significantly to reduce the cost of sending identical content simultaneously to many users.In addition, (for example, the compossibility that covers of part in 700MHz) and wide area has obtained support to single RF channel as described above.More multiple target program, local advertisements and the ability of interrupting as required and readjusting are supported in this division between wide area and the local.MediaFLO
TMOnly be an example of the radio network of type described herein, and can envision the radio network of other equivalence on function.
Be similar to wired TV, the subscriber in the wireless broadcast network can order the business (for example, premium movies, physical culture etc.) of different grouping and layering, and provides one group of channel (for example, tennis, ESPN, soap opera, BBC etc.) to it.Different content provider are transferred to radio network with content, subsequently by its with content combination and according to scheduled time table with its broadcasting.During the supply to user's mobile device, the ability that receives the decode the channel that the user orders is programmed in this mobile device.This supply can after be updated to remove or to add other grouping and channel.A those of ordinary skill will recognize that the layered arrangement of described channel only was the example how multimedia and other content are provided just now.Also can utilize other layout of data and channel thereof or tissue and can not deviate from scope of the present invention.
Figure 1A has described two exemplary wireless broadcast networks 102,104.In these two networks 102,104 each can provide various different channels and content to a plurality of subscribers in relatively large geographic area.For example, the transmitter T of network 102
1120 can broadcast various channels, and transmitter T
2130 can broadcast its oneself channel in network's coverage area 104.
Not necessarily identical and can comprise different channels or comprise different content from the broadcasting of different transmitters 120,130.For example, network 102 can be in the pacific time zone and another network can be in the time zone, mountain region.Therefore, even two networks provide same channel, but because time zone difference (for example, main race film be scheduled always in 8 beginnings of Afternoon Local Time) so the actual programs layout of broadcasting also may be different.In addition, also have logical channel (for example, ESPN) and physical channel (for example, specific T DM time slot, or special frequency band).So,, may on identical physical channel, not broadcast even two networks 102,104 all provide ESPN yet.
The result of these differences moves to different radio network 104 with the wireless user from the overlay area of a radio network 102 to the visit meeting of available content to change.With reference to Figure 1A, mobile device 110 is significantly in the overlay area of network 104, but other mobile device 108 can detect the existence of two networks 102,104.When mobile device 108 when network's coverage area 104 moves into another network's coverage area 102, from transmitter T
1120 broadcast singal is than from transmitter T
2It is stronger that 130 broadcast singal will become.Because this signal is stronger, so will being provided network 102 in better, the user of mobile device 108 serves, because will have still less signal delay, signal errors etc.Therefore, it seems that thing that mobile device 108 preferably will be done is to measure from the signal strength signal intensity of two transmitters 120,130 and lock onto stronger signal.This method has many defectives.
At first, the transitional region between these two networks is not clearly defined and may be changed according near structure, direct of travel, weather and other similar factor.Therefore, when the user when a network's coverage area moves on to another overlay area, the transmitter 120,130 with stronger signal may come and go variation and repeatedly be positioned at this new network's coverage area clearly up to the user.Therefore, if all equipment 108 is changed to this strongest network when detecting the new the strongest network at every turn, then the content that can use of this client computer also will change back and forth.Appearing in many situations of this thing will be very destructive in real time content and interaction content situation particularly.
Secondly, though signal degradation or relatively poor, but the user of equipment 108 may want to continue to appreciate specific content channels.For example, if watching sports tournament and be last a few minutes or a few second,, the user guarantees to watch this last moment in unbroken mode thereby may wishing to bear rudimentary service.
Another possible situation can make an explanation with reference to mobile device 106.Even this equipment 106 seems to be positioned at clearly network's coverage area 102, but from transmitter T
1120 signal is always the not strongest.For example, between equipment 106 and transmitter 120, may have building or other structure, thereby constitute " shade " of the reception degeneration that makes equipment 106.In this shade, from another transmitter T
2130 signal may be the strong signal of in fact institute's perception.Therefore, if be instant and automatically to the switching of heterogeneous networks, then equipment 108 all will lock onto different networks when leaving this shade entering.
The network diagram of Figure 1B has been described another situation of mobile device transition between heterogeneous networks.In this example, 3 transmitters (together with other unshowned transmitter) send signal on the zone that constitutes Wide Area Network 149.In this zone 149, have for the identical constant content collection in whole zone.Even when mobile device is arranged in of three regional areas 150,152,154 also is like this.Yet, some broadcasted content difference to some extent between heterogeneous networks 150,152,154 in these zones.Therefore, each network 150,152,154 has the own unique local content that is sent by transmitter 151,153,155 with common wide area content respectively.When equipment 160 and 162 was mobile in whole Wide Area Network 149, the wide area content will keep identical but local content may change.Therefore, be similar to the described situation about Figure 1A, may have some situations, it is useful wherein switching between different adjacent networks, should avoid the situation switched but also may have some.
Usually, transmitter 151,153,155 will broadcast by mobile device catch, demodulation and the decoding to extract the signal of needed content.In the ofdm system of mentioning before this, these signals can comprise wide area content-data, local content-data, expense (overhead) information and timing signal.The timing signal mobile device that is commonly called pilot signal is used to discern the reception of broadcast singal and sets up reference point for the remainder of this signal.Content-data can be assigned to different channels and broadcasting (depending on coding method) on time of separating or frequency.But the Overhead mobile device is used for determining which part of decoding broadcast singal.For example, if a channel need be provided from 20 or 50 channels that provided the user, then can to use Overhead to come in the demodulation sign indicating number broadcast singal relevant with required channel that part of for mobile device.Carry out the working life that power utilization rate efficiently is provided and has prolonged battery by this way.
Can multiplexed in every way part and data, pilot tone and the Overhead of wide-area transmission.For example, the data symbols of wide-area transmission can be multiplexed into " transmission span (span) " that distributes into wide-area transmission, the data symbols of local transmission can be multiplexed into the transmission span that distributes into local transmission, the TDM of wide-area transmission and/or FDM pilot tone can be multiplexed into the transmission span into these pilot frequency distribution, and the TDM of local transmission and/or FDM pilot tone can be multiplexed into the transmission span into these pilot frequency distribution.Overhead local and wide-area transmission can be multiplexed into the transmission span of one or more appointments.Different transmission spans is different sets of frequency subbands corresponding to (1) when wireless broadcast network has utilized FDM, (2) when having utilized TDM, be different time slices, or (3) are the different group of subbands in the different time fragment when not only having utilized TDM but also utilized FDM.Various multiplexing schemes have below been described.Two above networks of different type with covering of two above different layers also can processed, multiplexed and broadcasting.Wireless device in the wireless broadcast network is carried out to replenish and is handled the data of recovering local and wide-area transmission.
Fig. 2 shows an example super-frame structure 200 that can be used to broadcast local and wide-area transmission in the wireless broadcast network based on OFDM.Transfer of data is that the unit carries out with superframe 210.Each superframe span predetermined time duration, this duration can be according to such as the capture time of multiplexed, the time diversity amount that data flow is required of the required statistics of the data flow that is broadcasted, data flow, various factors such as require to select to the buffer of wireless device.The superframe of about one second size can provide balance preferably between above-mentioned various factors.Yet also can use other super frame size.
For the embodiment shown in Fig. 2, each superframe 210 comprises: the frame 230a of 220,4 equal sizes of header segment is to 230d, and the concluding paragraph 240 that is not illustrated in proportion in Fig. 2.Table 1 has been listed the various field of the section 220 and 240 of each frame 230.
| Field | Describe |
| The TDM pilot tone | The TDM pilot tone is used for input, frame synchronization, frequency error estimation and time synchronized |
| Transition pilot | Pilot tone is used for the time synchronized under channel estimation and the possibility situation and is sent out on the border of wide area and local fields/transmissions |
| WIC | Channel-the transmission of wide area sign is assigned to the identifier of the wide area of being served |
| LIC | Local identities channel-transmission is assigned to the identifier of the local of being served |
| Wide area OIS | Wide area overhead information code element-the be transmitted in Overhead (for example, frequency/time location and distribution) of each data channel that sends in the wide-area data field |
| Local OIS | Local overhead information symbols-the be transmitted in Overhead of each data channel that sends in local data's field |
| Wide-area data | Transmit the data channel of wide-area transmission |
| Local data | Transmit the data channel of local transmission |
For this embodiment shown in Fig. 2, use different pilot tones for different purposes.A pair of TDM201 is sent out also in the beginning of each superframe or near beginning place can be used to the purposes described in the table 1.Transition pilot is sent out on the border between part and the wide-area fields/transmissions, and allows to carry out between part and wide-area fields/transmissions seamless transitions.
Local and wide-area transmission can be used for such as content of multimedia such as video, audio frequency, data, teletext, video/audio clip, and can be sent out in independent data flow.For example, single multimedia (for example, TV) program can send in three independent data flow that are used for video, audio frequency and data.Data flow is sent out on data channel.Each data channel can transmit one or more data flow.The data channel that transmits the data flow of local transmission is also referred to as " local channel ", and the data channel of the data flow of transmission wide-area transmission is also referred to as " wide-area channel ".Local channel is to send in local data's field of superframe, and wide-area channel sends in the wide-area data field.
Depend on the availability that interweaves in the payload, superframe of this data channel and possible other factors, each data channel can interweaving by fixing in " distribution " each superframe or variable number.Each data channel can be movable or inactive in any given superframe.Each movable data channel is also based on specific interweaving in allocative decision quilt " distribution " this superframe, this allocative decision is attempted (1) and is filled all movable data channels as far as possible efficiently, (2) reduce transmission time of each data channel, (3) for each data channel provides the time enough diversity, and (4) make indication be assigned to interweaving of each data channel required signaling amount to minimize.For each movable data channel, identical interlace assignment can be used for these four frames of this superframe.
Local OIS field pointer distributes the time-frequency of each active local channel of current superframe.Wide area OIS field pointer distributes the time-frequency of each active wide-area channel of current superframe.Local OIS and wide area OIS beginning place of each superframe be sent out with allow wireless device determine in this superframe the time-frequency position of interested each data channel.
Each field of superframe can be shown in Figure 2 order or other send in proper order.Generally speaking, the data of follow-up transmission are desirable in the superframe so that TDM pilot tone and Overhead can be used to receive early to send TDM pilot tone and Overhead in superframe.Wide-area transmission can send before the local transmission or send after local transmission as illustrated in fig. 2.
Fig. 2 shows a specific super-frame structure.Generally speaking, but any duration of superframe span and can comprise section, frame, the field of arbitrary number and any type.Yet, have the useful superframe relevant with circulation timei usually and continue scope with the capture time of receiver electronic installation.Other superframe and frame structure also can be used to broadcast dissimilar transmission, and also within the scope of the invention.
The pilot signal of the Fig. 2 that is sent out during broadcast transmitted can be used to the channel estimation that derivation (1) is also referred to as the wide-area transmission of wide-area channel estimation, and (2) are also referred to as the channel estimation of the local transmission of local channel estimation.Local and wide-area channel estimates to be used to respectively the Data Detection and the decoding of local and wide-area transmission.These pilot tones also can be used to channel estimation, time synchronized, catch (for example, automatic gain control (AGC)) etc.Transition pilot also can be used to obtain the timing of the improvement of local transmission and wide-area transmission.
Fig. 3 shows the base station 1010 in the wireless broadcast network 100 among Figure 1A and the 1B and the block diagram of wireless device 1050.Base station 1010 generally is fixed station and can be called as access point, transmitter or some other term.Wireless device 1050 can be fixing or move and can be called as user terminal, mobile radio station, receiver or some other term.Wireless device 1050 can also be such as portable units such as cell phone, portable equipment, wireless module, PDA(Personal Digital Assistant)s.
1010 places in the base station send (TX) data processor 1022 and 1012 receive the data that are used for wide-area transmission, this wide-area data of processing (for example, encode, interweave and symbol mapped) from the source, and generate the data symbols that is used for wide-area transmission.Data symbols is the modulated symbol of data, and modulated symbol is corresponding to any complex value in the signal constellation (in digital modulation) of modulation scheme (for example, M-PSK, M-QAM etc.).Data and pilot frequency code element that TX data processor 1022 also generates FDM and the transition pilot that is used for the wide area under the base station 1010 and will be used for this wide area offer multiplexer (Mux) 1026.TX data processor 1,024 1014 receives the data be used for local transmission from the source, handles this local data, and generate the data symbols that is used for local transmission.Data and pilot frequency code element that TX data processor 1024 also generates the pilot tone that is used for the local under the base station 1010 and will be used for this local offer multiplexer 1026.To the coding of data and modulation can according to be used for wide-area transmission or local transmission, data type such as these data, the required various factorss such as overlay area of these data are selected.
At wireless device 1050 places, 1010 signals that send are received and offer receiver unit (RCVR) 1054 by antenna 1052 from the base station.The signal that receiver unit 1054 adjustings (for example, amplification, filtering and down-conversion) receive also will be somebody's turn to do signal digitalized to generate data sample stream through what regulate.1060 pairs of these data samples of demodulator (Demod) are carried out (for example, OFDM) demodulation and the pilot frequency code element that receives offered (Sync)/channel estimation unit 1080 synchronously.Unit 1080 also receives these data samples, determines that according to this data sample frame regularly and symbol timing and according to the received pilot frequency code element derivation local that is used for local and wide area and the channel estimation of wide area from receiver unit 1054.Unit 1080 offers this symbol timing and channel estimation demodulator 1060 and this frame is regularly offered demodulator 1060 and/or controller 1090.Demodulator 1060 usefulness local channel are estimated the data symbols of the local transmission that receives is carried out Data Detection, estimated the data symbols of the wide-area transmission that receives is carried out Data Detection and the data symbols of detected part and wide-area transmission is offered multiplexer (Demux) 1062 with wide-area channel.Detected data symbols be the data symbols that sends of base station 1010 estimation and can log-likelihood ratio (LLR) or other form provide.
Go multiplexer 1062 that the data symbols of detected all interested wide-area channel is offered reception (RX) data processor 1072 and the data symbols of detected all interested local channel is offered RX data processor 1074.RX data processor 1072 is handled the data symbols of (for example, deinterleaving and decoding) detected wide-area transmission according to the demodulation code plan that is suitable for and the data through decoding of wide-area transmission is provided.RX data processor 1074 is handled the data symbols of detected local transmission according to the demodulation code plan that is suitable for and the data through decoding of local transmission is provided.Generally speaking, wireless device 1050 place's demodulators 1060, go to multiplexer 1062 and RX data processor 1072 and 1074 processing respectively with the processing complementation of modulator 1028, multiplexer 1026 and TX data processor 1022 and 1024 at 1010 places, base station.
For clarity, Fig. 3 shows in the base station 1010 parts of being carried out by two different data processors with wireless device 1050 places and the data processing of wide-area transmission.The data processing of all types of transmission all can be carried out by the individual data processor in base station 1010 and the wireless device 1050 each.Generally speaking, the transmission with any a plurality of types of distinct coverage region can be sent and be received by wireless device 1050 by base station 1010.For clarity, Fig. 3 also is shown all unit of base station 1010 and is positioned at same place.Generally speaking, these unit can be positioned at identical or different place and can communicate by letter by various communication links.For example, data source 1012 and 1014 can be positioned at outside this place, and transmitter 1032 and/or antenna 1034 can be positioned at and send place, place etc.
Fig. 4 has described when definite mobile device should switch to an illustrative methods of another network from a radio network flow chart.In step 402, mobile device normal running and based on current selected service radio network demodulation code data.The demodulation sign indicating number of signal is based on the previous detected TDM pilot signal that timing information and channel estimation be provided (and other pilot signal) possibly.
In decode procedure, may go wrong and these mistakes can detect by using error correcting code and other technology.Because the uncertainty of wireless environment is even also a certain amount of mistake may occur in the system of proper operation.Therefore, select a definition can accept the threshold value of the mistake of number usually.This mistake that can accept number can be based on whole superframe or based on each independent frame in this superframe.Therefore, threshold value can be " in the whole superframe 16 mistakes or below 16 " and another threshold value can be " no more than 2 mistakes in any other frame ".In addition, thus wide-area data can have proprietary threshold value to local area data make to be allowed to have in the local area data than more mistake in the wide-area data.In a word, those of ordinary skill will recognize that many distinct methods measure and determine whether to have surpassed the predetermined errors threshold value.
If reached the more mistake of mistake that compares the number that is allowed in step 404, the software of then carrying out on mobile device makes demodulator in step 406, catches this current demand signal again.This is caught again can be brand-new catch or can be to use the part of the previous detected information of part to catch again from what wipe beginning.For example, a kind of favorable method of catching the signal that uses the superframe among Fig. 2 again is to attempt catching again WIC/LIC, TDM2 and OIS.Based on the information of catching again, can improve the timing resolution that is used for demodulation sign indicating number in future.This step only may be corrected because any problem that timing problems causes.
In step 408, mobile device continues the data of demodulation sign indicating number from the current service network.Simultaneously, in step 410, mobile device is caught it can also generate the mark of indicating each quality of signals by detected all signals.Advantageously, thus the number of samples of each signal makes each quality of signals mark be based on the synthetic mark of the different samples of each signal greater than 1.For example, can detect 5 samples (sample more or less) of each signal and the respective quality mark of each sample is done together average to produce the composite score of this signal.Use the superframe of Fig. 2, can catch WIC/LIC, TDM2 and the OIS of all detectable network candidates.Based on pilot signal and/or other signal, can distribute mass fraction to each WIC/LIC.As mentioned, this mass fraction can generate from each WIC/LIC, TDM2 and OIS by detecting a plurality of superframes.
In step 412, whether the WIC/LIC that makes the current service network is from the optimal network (based on mass fraction) in the middle of the network candidates tabulation that is arranged in step 4 10.If the optimal network in this candidate list is a heterogeneous networks, then the user can be presented one and switches to this new network and still remain on selection on the current network.If the user keeps, the quality of signals that then receives may descend, and also will continue by the demodulation sign indicating number.Finally, this signal may too be degenerated and semaphore lock will be lost.
If the user selects handover network in step 414, then mobile device is carried out catching fully again this network.Use the superframe example of Fig. 2, mobile device is caught TDM1, WIC/LIC, TDM2 and the OIS of this new network with this broadcast singal of beginning demodulation sign indicating number.
Above method has prevented the reciprocal effect switched between previous described two adjacent networks with dual mode at least.At first, do not switch by selection, the user can prevent to switch to another network from a network automatically, even the relative signal intensity of these two networks may have suggestion in addition.Secondly, by on a plurality of samples mass fraction being made up, thereby the time anomaly in the signal strength signal intensity is left in the basket and makes and can not cause problem.Correspondingly, the switching between two networks can still take place can user-friendly mode to carry out again simultaneously effectively.
Fig. 5 shows can be according to the diagrammatic sketch on the piece aspect of a replaceability of the mobile device 500 of operate of the present invention.Definite device 502 that each network mass fraction separately in one definite a plurality of radio networks is arranged.This mass fraction indication successfully receives the decode the likelihood of specific broadcast network signal with acceptable erroneous level.Equipment 500 also comprises the receiving system that receives order from the operator of user or equipment 500.It is relevant whether this order and user want to switch to another radio network from a radio network.The result of receiving system 504 and definite device 502 is provided for decoding device 506.Especially, decoding device which signal in these broadcast network signal of can selecting to decode.For example, decoding device may remain in its current selection and continue to receive the decode the current broadcast network signal.Perhaps, order if so, thus then decoding device can switch and makes it receive the decode the different radio networks with highest mass fractions.Correspondingly, mobile device 500 can allow the user to import whether to switch to another network from a radio network at mobile device 500 to play a factor effect.
Described here being used for can realize by various devices by the technology of the dissimilar transmission of air broadcast.For example, these technology can make up with hardware, software or its and realize.Realize that for hardware the processing unit that is used to broadcast dissimilar transmission on the base station can be at one or more application-specific integrated circuit (ASIC)s (ASIC), digital signal processor (DSP), digital signal processor spare (DSPD), programmable logic device (PLD), field programmable gate array (FPGA), processor, controller, microcontroller, microprocessor, be designed to carry out in other electronic unit of function described herein or its combination and realize.The processing unit that is used to receive dissimilar transmission on the wireless device also can be realized in one or more ASIC, DSP etc.
Realize that for software technology shown here can realize with the module (for example, process, function etc.) of carrying out function described herein.Software code can be stored in the memory cell (for example, the memory cell among Fig. 3 1042 or 1092) and by processor (for example, controller 1040 or 1090) and carry out.Memory cell can realize in processor or outside the processor that it can be coupled to processor communicatedly by various devices known in the art in the situation outside processor.
Previous explanation is provided to be used so that any technical staff of this area can both put into practice each embodiment described herein.Modification to these embodiment is conspicuous for those skilled in the art, and can be applied to other embodiment in the general principle of this definition.Therefore, claim is not intended to be limited to embodiment described herein, but according to the corresponding to four corner of written claim, wherein quoting of odd number element is not intended to expression " and only have ", unless especially so explanation, otherwise expression " one or more ".Maybe will be included in this clearly by reference for those skilled in the art is known for the 26S Proteasome Structure and Function equivalence of its known element that runs through the described various embodiment of the disclosure and be intended to for claim included.In addition, nothing disclosed herein is intended to be public, no matter whether the disclosure be explicitly recited in the claim.Unless the claim key element use clearly phrase " be used for ... device " state or in claim to a method, use phrase " be used for ... step " state that otherwise the claim key element should not understood according to 35U.S.C. § 112, the 6th section.
Claims (24)
1. Wireless Telecom Equipment comprises:
Processor is configured to determine to have in a plurality of radio networks one of highest mass fractions;
User interface, be configured to from the user of described equipment receive with the described a plurality of networks of selection a described relevant order; And
Receiver by the control of described processor, and is configured to change described one signal the described a plurality of radio networks of decoding based on described order into from decoding current broadcast signal.
2. Wireless Telecom Equipment as claimed in claim 1 is characterized in that:
Described user interface be further configured to the user present with select described a plurality of networks in a described relevant inquiry.
3. Wireless Telecom Equipment as claimed in claim 1 is characterized in that: described a plurality of radio networks comprise provides the current broadcast of described current broadcast signal network.
4. Wireless Telecom Equipment as claimed in claim 1 is characterized in that:
Described receiver comprises demodulator and decoder.
5. Wireless Telecom Equipment as claimed in claim 1 is characterized in that:
Described receiver is further configured into the corresponding signal of reception from least one subclass of described a plurality of radio networks.
6. Wireless Telecom Equipment as claimed in claim 5 is characterized in that:
Described processor is further configured each the corresponding mass fraction in the described subclass that becomes to determine described a plurality of radio networks.
7. Wireless Telecom Equipment as claimed in claim 6 is characterized in that:
Each corresponding mass fraction in the described subclass of described a plurality of radio networks is based on described corresponding signal.
8. Wireless Telecom Equipment as claimed in claim 6 is characterized in that:
Each corresponding mass fraction in the described subclass of described a plurality of radio networks is based on the corresponding signal intensity of described corresponding signal.
9. Wireless Telecom Equipment as claimed in claim 6 is characterized in that:
Each corresponding mass fraction in the described subclass of described a plurality of radio networks is based on the one or more corresponding pilot signal in each corresponding signal.
10. Wireless Telecom Equipment as claimed in claim 6 is characterized in that:
Described user interface be further configured to the user present comprise at least two highest mass fractions and with in the middle of described a plurality of radio networks, select a new radio network to begin the relevant inquiry of decoding.
11. Wireless Telecom Equipment as claimed in claim 5 is characterized in that:
Described processor is further configured in the described subclass of described a plurality of radio networks each:
Catch a plurality of samples of described corresponding signal,
Determine the intermediate mass mark of each sample, and
Described intermediate mass mark is made up to calculate the respective quality mark.
12., it is characterized in that described a plurality of samples comprise the sample between 2 to 5 as claim 11 described Wireless Telecom Equipment.
13. a Wireless Telecom Equipment comprises:
Receiver, current demand signal from a current broadcast network in a plurality of radio networks that have a corresponding signal separately is configured to decode;
Processor is configured to determine in the described corresponding signal to have of highest mass fractions with respect to other signal;
User interface is configured to user to described equipment and presents and comprise about selecting the described inquiry for the inquiry of decoding in the described corresponding signal;
Described user interface is further configured from the instruction of described user's reception in response to described inquiry, and
Receiver, be configured to according to described instruction with:
If the described current demand signal of described instruction instruction decoding, even described one in the then described corresponding signal
Individual is not described current demand signal, continues the described current demand signal of decoding, perhaps yet
If in the described corresponding signal of described instruction instruction decoding described one, it is described then to switch to decoding
In the corresponding signal described one.
14. Wireless Telecom Equipment as claimed in claim 13 is characterized in that:
Described processor is configured to determine the corresponding mass fraction of described corresponding signal of described a plurality of radio networks.
15. Wireless Telecom Equipment as claimed in claim 14 is characterized in that:
Described inquiry comprises the described corresponding signal that sign has n highest mass fractions, and wherein n is between 2 to 4.
16. Wireless Telecom Equipment as claimed in claim 14 is characterized in that:
Described processor is further configured based on each n the sample in the described corresponding signal determines described respective quality mark, and wherein n is between 2 to 10.
17. Wireless Telecom Equipment as claimed in claim 16 is characterized in that, n is between 2 to 5.
18. Wireless Telecom Equipment as claimed in claim 13 is characterized in that:
In the described corresponding signal each comprises local content and wide area content.
19. Wireless Telecom Equipment as claimed in claim 18 is characterized in that:
The subclass of described corresponding signal comprises the two or more signals that have identical wide area content but have different local contents.
20. a method of switching between radio network in Wireless Telecom Equipment comprises:
From separately from the middle of a plurality of broadcast singals of respective broadcast network the decoding one current broadcast signal;
Determine whether to have in described a plurality of broadcast singal one to have than the higher mass fraction of described current broadcast signal;
Whether the user who inquires described equipment switches to described in described a plurality of broadcast singal; And
If the user selects to switch, in the described a plurality of broadcast singal that then begins to decode described one to replace described current broadcast signal; Otherwise, continue the described current broadcast signal of decoding.
21. method as claimed in claim 20 is characterized in that, further comprises:
Calculate each the corresponding mass fraction in described a plurality of broadcast singal.
22. method as claimed in claim 21 is characterized in that, described calculating also comprises:
Catch each a plurality of samples in described a plurality of broadcast singal;
Determine each the intermediate mass mark in described a plurality of sample;
Described intermediate mass mark is made up to form each in the described respective quality mark.
23. one kind comprises the computer-readable recording medium that is used for the instruction set switched at Wireless Telecom Equipment between radio network, described instruction comprises:
Be used for from wherein separately from the middle of a plurality of broadcast singals of a respective broadcast network decoding one current broadcast signal routine;
Be used for determining whether described a plurality of broadcast singals have a routine with mass fraction higher than described current broadcast signal;
Be used for inquiring whether the user of described equipment switches to described one routine of described a plurality of broadcast singals; And
Be used under the situation that the user selects to switch, beginning decoding described a plurality of broadcast singals described one to replace described current broadcast signal; Otherwise continue the routine of the described current broadcast signal of decoding.
24. a Wireless Telecom Equipment comprises:
Be used for one the device that definite a plurality of radio networks have highest mass fractions;
Be used for from the device of user's reception with a described relevant order of selecting described a plurality of networks of described equipment; And
Be used for changing into from decoding current broadcast signal the device of described one signal of the described a plurality of radio networks of decoding based on described order.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US66955505P | 2005-04-07 | 2005-04-07 | |
| US60/669,555 | 2005-04-07 | ||
| US11/343,380 | 2006-01-30 |
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| Publication Number | Publication Date |
|---|---|
| CN101185362A true CN101185362A (en) | 2008-05-21 |
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ID=39449547
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2006800184780A Pending CN101185362A (en) | 2005-04-07 | 2006-04-07 | Selective network switching in a wireless broadcast network |
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| Country | Link |
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| CN (1) | CN101185362A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102932837A (en) * | 2011-08-12 | 2013-02-13 | 上海贝尔股份有限公司 | Method and device for detecting timing advance group change of cell |
| CN103167335A (en) * | 2011-12-15 | 2013-06-19 | 英顺源（上海）科技有限公司 | System and method for television signal playing for mobile device |
-
2006
- 2006-04-07 CN CNA2006800184780A patent/CN101185362A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102932837A (en) * | 2011-08-12 | 2013-02-13 | 上海贝尔股份有限公司 | Method and device for detecting timing advance group change of cell |
| CN103167335A (en) * | 2011-12-15 | 2013-06-19 | 英顺源（上海）科技有限公司 | System and method for television signal playing for mobile device |
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