CN101997624B - Hybrid network system and switching method based on same - Google Patents
Hybrid network system and switching method based on same Download PDFInfo
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- CN101997624B CN101997624B CN2009101626933A CN200910162693A CN101997624B CN 101997624 B CN101997624 B CN 101997624B CN 2009101626933 A CN2009101626933 A CN 2009101626933A CN 200910162693 A CN200910162693 A CN 200910162693A CN 101997624 B CN101997624 B CN 101997624B
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Abstract
The invention discloses a hybrid network system and a switching method based on the same. The system can comprise a plurality of transmitting devices and a plurality of transceiving devices, wherein each transmitting device can transmit signals to a terminal through a first network, and each transceiving device can transmit signals to the terminal through a second network; and each one of the transceiving devices can acquire communication configuration parameters of adjacent transmitting devices. If the terminal detects that the strength of currently received signals is lower than the switching threshold, the communication configuration parameters can be acquired from at least one transceiving device adjacent to the terminal, and one of the transmitting devices or one of the transceiving devices can be switched to on the basis of the acquired communication configuration parameters. By using the system and the method, the switching frequency of the terminal is reduced, thereby reducingthe ping-pong effect; and in addition, number of times for the terminal to search, contrast and synchronize signals, thereby achieving the purpose of reducing the power consumption of the terminal.
Description
Technical field
The disclosed technical scheme of the application relates to hybrid network system and based on the changing method of this system.
Background technology
Handheld digital video broadcasting (DVB-H) network of multifrequency point networking is made up of a plurality of high-power cell sites.In order to receive desirable signal, terminal need frequently be switched between the residential quarter of DVB-H network usually.
Traditional DVB-H residential quarter switch operating is mainly finished by terminal.Because the DVB-H radio network is unidirectional, there is not interactive channel, terminal can't awareness network situation and self present position, and therefore this switching is a kind of blind switching, is prone to ping-pong or is influenced by spurious signal, thereby cause the decline of switching efficiency.
Summary of the invention
At carrying out the low efficiency problem of residential quarter when switching in the prior art, the application discloses a kind of receiving system and method.
The application's one side discloses a kind of like this hybrid network system, and it can comprise:
A plurality of emitters, its each be configured to and can transmit to terminal by first networking;
A plurality of R-T units, its each be configured to and can transmit or therefrom receive signal to described terminal by second networking, each in described a plurality of R-T units further is configured to obtain the communication configuration parameter of the emitter that is adjacent,
Wherein, if described terminal detects the signal strength signal intensity of current reception when being lower than handoff threshold, obtain described communication configuration parameter by at least one R-T unit adjacent with described terminal, and switch in one or more R-T units in described a plurality of emitter one based on the communication configuration parameter of obtaining.
The application discloses the method that receives signal based on hybrid network system on the other hand, described hybrid network system comprise with first network of terminal one-way communication and with second network of terminal two-way communication, described first networking comprises a plurality of emitters, and described second network comprises a plurality of R-T units; Described method can comprise:
Whether the signal strength signal intensity that detects current reception is lower than handoff threshold;
If be lower than described handoff threshold, then obtain in described a plurality of emitter the communication configuration parameter of at least one at least one from described a plurality of R-T units;
Between emitter and R-T unit, switch described terminal based on described communication configuration parameter.
According to above-mentioned receiving system and signal acceptance method, when terminal detects its signal and needs to switch a little less than, carrying out the first conventional network, before for example broadcast cell switches, at first can pass through second network, for example the base station of UTMS determines whether to exist the broadcast cell that will switch to, can bring like this in the following beneficial effect one of at least:
1) reduces the terminal switching times, thereby can reduce the ping-pong that causes because of the blind switching of terminal;
2) reduce the number of times of terminal searching, contrast and synchronizing signal, thereby reach the purpose that reduces power consumption of terminal; And
3) because terminal can be obtained the information of broadcast cell on every side from the mobile base station, terminal just can realize handoff predictions like this.For example, terminal is passed through broadcast cell B from broadcast cell A border is during to broadcast cell C, and for blind switching, when residential quarter B signal was better than residential quarter C, terminal can switch to residential quarter B from residential quarter A, waited residential quarter B signal to weaken afterwards, switched to C from B again.Yet, according to the disclosed system and method for the application, know from the mobile base station that when terminal the signal strength signal intensity of residential quarter C is higher than handoff threshold, terminal can directly switch to residential quarter C from residential quarter A so, and no longer switches to the B residential quarter.
Description of drawings
Fig. 1 is the schematic diagram according to the exemplary receiving system of the application;
Fig. 2 is the schematic block diagram of the radio network cell site shown in Fig. 1 and mobile network base station communication; And
What Fig. 3 showed is the flow chart of terminal when the receiving system shown in Fig. 1 carries out the signal switching.
Embodiment
Describe according to the receiving system of an execution mode of the application below with reference to accompanying drawings and receive the method for signal based on this system.For simplicity's sake, in the explanation of each embodiment of the application, identical or similarly the device or parts used identical Reference numeral.
Receiving system 1000 generally includes content providing server 10, a plurality of emitter 20-1,20-2...20-n (being shown the radio network cell site in Fig. 1) and a plurality of R-T unit 30-1,30-2....30-n (being shown the mobile network base station in Fig. 1).
Content providing server 10 for example is the server of stream media service system or video service system, be configured to and launch data by broadcasting core net 40 and mobile core network 50 to the 20-1 of radio network cell site, 20-2...20-n and mobile network base station 30-1,30-2....30-n respectively, wherein, the 20-1 of radio network cell site, 20-2...20-n can intercom mutually with mobile network base station 30-1,30-2....30-n, and this will be described further with reference to Fig. 2 below.
Broadcasting core net 40 and mobile core network 50 exemplarily are shown DVB-H core net 40 and conventional wireless communication systems (UMTS) core net 50 in Fig. 1.Yet, should be appreciated that the technical scheme of this execution mode is not limited to this, broadcasting core net 40 can be radio network arbitrarily, mobile core network 50 also can be mobile communications network arbitrarily.
The hybrid network that first embodiment of the application will form with DVB-H core net 40 and UMTS core net 50 is that example describes.
Because the coverage 70 of DVB-H residential quarter is bigger than the coverage 80 of UMTS usually, therefore in Fig. 1, exemplarily shows in the coverage cell of a DVB-H emission stop signal 20-1 and comprised 6 UMTS base station 30-1,30-2....30-6 (that is, n=6).Be appreciated that each can also belong to the residential quarter that other DVB-H emission stop signal covers simultaneously among UMTS base station 30-1, the 30-2....30-6, for example, base station 30-2 can also belong to the broadcast cell that broadcast base station 20-2 covers, as shown in Figure 1.
Fig. 2 exemplarily shows DVB-H emission stop signal 20-1, the schematic diagram that 20-2...20-n and UMTS base station 30-1,30-2....30-n intercom mutually.As shown in Figure 2, DVB-H emission stop signal 20-1,20-2...20-n in each comprise broadcast signal transmission unit 201 and configuration information transmitting element 202, wherein broadcast signal transmission unit 201 is configured to 10 media data information that receive to terminal 60 emission from content providing server.Configuration information transmitting element 202 is configured to send the communication configuration parameter related with the DVB-H emission stop signal to UMTS base station 30-1,30-2....30-n, and the DVB-H network ID that for example will be discussed in more detail below, residential quarter ID, the frequency of use, the sign of media data information etc. transmit.
Among UMTS base station 30-1, the 30-2....30-n each comprises media information transmitter unit 301, configuration information receiving element 302, detecting unit 303 and data storage cell 304.Media information transmitter unit 301 is configured to the data to terminal 60 emissions from content providing server 10 receptions.Configuration information receiving element 302 is configured to receive the communication configuration parameter that information transmitter unit 202 sends, and the information that receives for example is kept in the memory cell 304.As an example, configuration information receiving element 302 is kept at the memory cell 304 with the form that NHT shows from the configuration information that configuration information transmitting element 202 receives.
Detecting unit 303 is configured to position and the moving direction of sense terminals 60 in real time, and the intensity of the signal that can receive respectively from adjacent DVB-H cell site in this position from terminal 60.Based on the signal strength information of detected position and moving direction and reception, detecting unit 303 calculates in the DVB-H network weight (weight) of the residential quarter adjacent with terminal 60 respectively, and it for example is kept in the NHT table.
The basic parameter that comprises in the NHT table is as shown in table 1.
| net_id | cell_id | freq | weight | str_id | link_int |
| DVB-H1 | cell_1 | freq_1 | W1 | str_1 | IPDC address 1 |
| DVB-H2 | cell_2 | Freq_2 | W2 | str_2 | IPDC address 2 |
| DVB-H3 | cell_3 | Freq_3 | W3 | str_3 | IPDC address 3 |
| ... | ... | ... | ... | ... | ... |
Table 1
Wherein, net_id represents the network identity of DVB-H;
Cell_id represents the sign of DVB-H residential quarter;
The frequency that freq uses when representing DVB-H cell site emission data;
Weight represents the weight of the DVB-H residential quarter adjacent with terminal;
The transport stream identification of str_id presentation medium content; And
Link_int points to the INT table, and wherein the INT table is used for finding IP-based data broadcasting (IPDC) service.
As mentioned above, parameter net_id, cell_id and freq can be by DVB-H emission stop signal 20-1, and the configuration information transmitting element 202 of 20-2...20-n sends in the configuration information receiving element 302 of UMTS base station 30-1,30-2....30-n.Because DVB-H emission stop signal 20-1,20-2...20-n and UMTS base station 30-1,30-2....30-n are relatively-stationary, so parameter net_id, cell_id and freq also can determine when network design.
Parameter s tr_id and link_int can be in the processes that media data is communicated by letter, the concrete media data that is obtained from content providing server 10 by configuration information transmitting element 202 bases obtains, and sends to the configuration information receiving element 302 in the UMTS base station in real time.
Parameter weight can for example determine by following formula:
Weight=K1*signal_stren+K2*f (terminal_loc, terminal_dir) formula 1)
Wherein, terminal_loc and terminal_dir determine with respect to position and the moving direction of DVB-H cell site according to terminal 60 that respectively signal_stren represents the intensity of the signal that terminal 60 can receive from the DVB-H cell site when the terminal_loc of position.K1 is illustrated in the shared weight of parameter s ignal_stren when determining weight, function f is used for calculating expression terminal 60 with respect to the position of DVB-H cell site and the information of moving direction, and K2 is illustrated in parametric t erminal_loc and the shared weight of terminal_dir when determining weight.Can select different K1 and K2 according to the concrete condition of network.For example, in the signal strength signal intensity frequent variations but the terminal mobile phase to few communication environment in, can suitably select higher K1 value and the K2 value selecting to reduce relatively; And move very fast but change in signal strength relatively stably in the communication environment in terminal, can suitably improve the numerical value of K2 and reduce the numerical value of K1.Should be appreciated that the method for above-mentioned calculating weight only is the simple examples that exemplifies for illustrative purposes, those skilled in the art can instruction according to the present invention draw other computational methods.
For exemplary purposes, in the superincumbent execution mode, configuration information receiving element 302 is described to be kept at the memory cell 304 from the configuration information that configuration information transmitting element 202 receives, yet should be appreciated that, the present invention is not limited to this, the configuration information that receives from configuration information transmitting element 202 for example can be stored in any storage device or database of communicating by letter with configuration information receiving element 302, and at this moment, the UMTS base station no longer needs independent memory cell 304.
Usually, terminal 60 receives signal from the cell site of DVB-H net.When the intensity sign (RSSI) that detects the signal of current reception when terminal 60 is lower than the predetermined threshold of DVB-H agreement regulation, from one or more mobile base stations of being adjacent (for example, base station 30-1 and 30-2 among Fig. 1) obtain network switching table (NHT), and carry out network according to the parameter in the NHT table and switch, this will be further described with reference to Fig. 3 below.
Fig. 3 has shown the flow chart of the method 2000 of terminal 60 when the receiving system shown in Fig. 1 carries out the signal switching.As shown in the figure, in step S001, terminal 60 detects the current RSSI of signals that is receiving.In step S002, terminal 60 judges whether the RSSI that detects is lower than handoff threshold, and wherein handoff threshold can be stipulated according to the DVB-H agreement.If be not less than handoff threshold then get back to step S001 and continue the signal that receives is detected; Otherwise enter step S003.In step S003, terminal 60 judges whether the current signal that is receiving is the data that receive from DVB-H core net 40, and whether namely from for example DVB-H emission stop signal 20-1, one among the 20-2...20-n receives data.
If the result who judges in step S003 receives data by DVB-H core net 40, then terminal 60 is waited in step S004 and from the DVB-H cell site current data being received, and causes when avoiding switching in DRP data reception process to receive to interrupt; Otherwise execution in step S005.In step S005, NHT table of storage is therefrom selected maximum weight value in the memory cell 304 that terminal 60 is searched in the mobile cell base station (being base station 30-1 and 30-2 in Fig. 1) the most adjacent with it.Then, terminal 60 judges that in step S006 whether selected weight value is greater than predetermined weight threshold value.
If the result who judges is greater than the weight threshold value, then in step S007, terminal 60 is according to selected weight value, thereby from the NHT table, select corresponding net_id, cell_id and freq to determine the DVB-H residential quarter that to switch, and switch to the residential quarter of determining, and it is synchronous to carry out media data flow according to corresponding parameters str_id and link_int in the NHT table.The generation of spurious signal may be because adjacent network has identical frequency of utilization Freq and cell ID cell_id.According to this method, because the parameter of switching as judgement with parameter network_id, Freq and cell_id, produce unnecessary residential quarter in the time of therefore can having avoided spurious signal occurring owing to reasons such as diffraction or diffraction and switch.In addition, be technique known synchronously because str_id and link_int carry out media data flow, therefore repeat no more.
On the other hand, if the result who judges in step S006 is that all weight values are all less than predetermined weight thresholding in all NHT tables, then terminal 60 is carried out conventional DVB-H residential quarter hand-off process.Whether particularly, the DVB-H residential quarter that 60 pairs at terminal is adjacent in step S008 is scanned, and determine to exist in the DVB-H residential quarter of all scannings DVB-H RSSI of signals value to surpass above-mentioned handoff threshold in step S009.If exist, then in step S010, switch to corresponding DVB-H residential quarter, otherwise in step S011, terminal 70 switches to and receives in the UMTS core net 50 in the best base station of signal, to the identical media business of its request.Base station and the media sync when asking identical media professional subsequently that portable terminal switches in the UTMS network are technique known, therefore repeat no more.
Owing to can take the UTMS communication resource when using the UTMS network to carry out media data communication, therefore in step S011, switch in UMTS core net 50 receiving media datas, method 2000 gets back to detect among the step S005 whether available DVB-H residential quarter is arranged, to prepare to switch to the DVB-H network.
The above only is some concrete execution modes; be not to limit claim of the present invention; every equivalent transformation that utilizes present specification and accompanying drawing content to do; or the equivalent technologies feature that directly or indirectly is used in other relevant technical fields modification that the disclosed technical scheme of present specification is carried out, include in protection scope of the present invention.
Claims (10)
1. hybrid network system comprises:
A plurality of emitters (20-1,20-2...20-n), its each be configured to and can transmit to terminal by first networking, wherein, described first networking is digital video broadcasting network; And
A plurality of R-T unit (30-1,30-2....30-n), its each be configured to and can transmit or receive signal to described terminal by second networking, in described a plurality of R-T unit each further is configured to obtain the communication configuration parameter of adjacent transmission device, described configuration parameter comprises the weight parameter of residential quarter adjacent with described terminal in described first network, wherein, described weight parameter is according to real-time detected position and the moving direction of described terminal, and the intensity of the described terminal signal that can in the communication cell of described first network, receive and determining;
Wherein, if described terminal detects the signal strength signal intensity of current reception when being lower than handoff threshold, in described weight parameter, determine whether to exist numerical value greater than the weight parameter of weight thresholding, if exist, with described terminal switch to described a plurality of emitter (20-1,20-2...20-n) in numerical value greater than a corresponding emitter of the described weight parameter of weight thresholding.
2. the system as claimed in claim 1, wherein, each in described a plurality of emitters comprises:
Broadcast signal transmission unit (201) is configured to transmit to described terminal; And
Configuration information transmitting element (202) is configured to described a plurality of R-T units (30-1,30-2....30-n) the transmission described communication configuration parameter related with described emitter.
3. system as claimed in claim 2, wherein, described a plurality of R-T units (30-1,30-2....30-n) in each comprises:
Media data transmitter unit (301) is configured to transmit to described terminal;
Configuration information receiving element (302) is configured to receive the described communication configuration parameter from described configuration information transmitting element (202); And
Detecting unit (303) is configured to detect in real time position and the moving direction of described terminal, and the strength information of the described terminal signal that can receive from adjacent emitter in described position,
Wherein, described detecting unit be further configured into, calculate described weight parameter based on detected position, moving direction and strength information.
4. system as claimed in claim 3, described a plurality of R-T units (30-1,30-2....30-n) in each also comprises:
Memory cell (304) is configured to preserve described configuration information receiving element (302) from the described communication configuration parameter of described configuration information transmitting element (202) reception and the described weight parameter of described detecting unit (303) calculating.
5. the system as claimed in claim 1, wherein, described communication configuration parameter also comprises parameter net_id, cell_id and freq at least;
Wherein, net_id represents described first network of network sign; Cell_id represents the sign with described a plurality of emitter corresponding district; The frequency that freq used when representing that the residential quarter transmits in described first network; And described weight parameter is represented the weight of the residential quarter determined according to parameter net_id, cell_id and freq.
6. system as claimed in claim 5, wherein, if in described communication configuration parameter, exist numerical value greater than the weight parameter of weight thresholding, then according to weight parameter corresponding parameters net_id, cell_id, the freq definite residential quarter that will switch of numerical value greater than the weight thresholding.
7. changing method based on hybrid network system, described hybrid network system comprise can with first network of terminal one-way communication and can with second network of terminal two-way communication, described first networking comprises a plurality of emitter (20-1,20-2...20-n), described second network comprises a plurality of R-T unit (30-1,30-2....30-n), described first networking is digital video broadcasting network; Described method comprises:
Whether the signal strength signal intensity of the current reception of sense terminals is lower than handoff threshold;
If be lower than described handoff threshold, then from described a plurality of emitter (20-1,20-2...20-n) at least one in obtain and described a plurality of R-T unit (30-1,30-2....30-n) at least one related communication configuration parameter, wherein said configuration parameter comprises the weight parameter of residential quarter adjacent with described terminal in described first network, wherein, the intensity of the described weight parameter signal that can receive in the residential quarter of described first network according to the real-time detected position of described terminal and moving direction and described terminal is determined; And
In the weight parameter that described communication configuration parameter comprises, determine whether to exist numerical value greater than the weight parameter of weight thresholding, if exist, with described terminal switch to described a plurality of emitter (20-1,20-2...20-n) in numerical value greater than a corresponding emitter of the described weight parameter of weight thresholding.
8. method as claimed in claim 7, wherein, described communication configuration parameter comprises parameter net_id, cell_id and freq at least;
Wherein, net_id represents described first network of network sign;
Cell_id represents the sign with described a plurality of emitter corresponding district;
The frequency that freq uses when representing the emission of different districts in described first network data; And
Described weight parameter is represented the weight of the residential quarter determined according to parameter net_id, cell_id and freq.
9. method as claimed in claim 8, wherein, the step of described switching further comprises:
Determine corresponding parameters net_id, cell_id, freq according to numerical value greater than the weight parameter of weight thresholding; And
In described first network, select the residential quarter that to switch based on parameter net_id, the cell_id, the freq that determine; And
Described terminal is switched to the emitter that is arranged in selected residential quarter.
10. method as claimed in claim 9, wherein, if in the communication configuration parameter of obtaining, do not exist numerical value greater than the weight parameter of weight thresholding, then described terminal is searched for the residential quarter adjacent with this terminal in described first network, to determine whether existing intensity level greater than the signal of described handoff threshold, if exist, described terminal switch to this signal corresponding district in emitter; Otherwise described terminal is switched in a plurality of R-T units of described second network.
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