CN101808403A - Method, base station and terminal for realizing bidirectional data transmission based on CMMB (China Mobile Multimedia Broadcasting) - Google Patents
Method, base station and terminal for realizing bidirectional data transmission based on CMMB (China Mobile Multimedia Broadcasting) Download PDFInfo
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- CN101808403A CN101808403A CN200910009007A CN200910009007A CN101808403A CN 101808403 A CN101808403 A CN 101808403A CN 200910009007 A CN200910009007 A CN 200910009007A CN 200910009007 A CN200910009007 A CN 200910009007A CN 101808403 A CN101808403 A CN 101808403A
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Abstract
The invention provides a method, a base station and a terminal for realizing the bidirectional data transmission based on CMMB (China Mobile Multimedia Broadcasting). The method comprises the following steps of: configuring resources of N time slots but the first time slot TS0 in the CMMB wireless frame as uplink transmission resources, configuring resources of other time slots as downlink transmission resources, and sending the resource configuration information to the terminal via the first time slot TS0 of the wireless frame. The invention not only can realize that the base station broadcasts multimedia data to each terminal, but also can realize that each terminal sends the multimedia data to the base station, that is the bidirectional transmission of the multimedia data based on CMMB, thereby making fuller use of the advantages of CMMB.
Description
Technical field
The present invention relates to the multimedia mobile communication technology, particularly a kind of method, base station and terminal that realizes bidirectional data transfers based on China Mobile multimedia broadcasting (CMMB).
Background technology
Mobile multi-media broadcasting service is meant that portable terminal sends the business of multi-medium datas such as digital sound, video with the form of broadcasting, and it has caused the extensive concern of industry as a kind of emerging multimedia service.
In existing China Mobile multimedia broadcasting (CMMB) system, the broadcast channel physical layer provides broadcast channel by physical layer logic channel (PLCH) for upper-layer service.PLCH is divided into control logic channel (CLCH) and service logical channels (SLCH), and CLCH is used to carry the broadcast system control information, and SLCH is used to carry broadcast service data.Fig. 1 is the physical frame structure of existing CMMB, and as shown in Figure 1, a physical frame is 1 second, is divided into 40 time slots.For single-frequency point mobile multimedia broadcast system, physical layer has only a fixing CLCH, takies first time slot TS0 of physical frame; SLCH is by system configuration, and the number of SLCH can be 1 to 39 in each physical layer bandwidth, takies individual other time slot except that TS0 of integer and carries out the transmission of descending multi-medium data.
Above-mentioned CMMB system because of its big bandwidth that has (can realize the bandwidth of 2M or 8M) as standard and be used widely, but, present CMMB only can be used for the downlink transfer of multi-medium data, and this makes that just the advantage of its big bandwidth can not be used fully.
Summary of the invention
In view of this, the invention provides a kind of method, base station and terminal, facilitate the use CMMB and also can carry out the transmission of up multi-medium data, make that the advantage of CMMB is utilized more fully based on CMMB realization bidirectional data transfers.
A kind of method based on CMMB realization bidirectional data transfers, this method comprises:
With the resource distribution at the time slot place of the wherein N except first time slot TS0 in the CMMB radio frames is uplink transmission resource, the resource distribution at other time slot place is the downlink transfer resource, and first time slot TS0 of resource allocation information by this radio frames sent to terminal;
Wherein, N is integer and 1≤N≤39.
A kind of base station of realizing bidirectional data transfers based on CMMB, this base station comprises: resource configuration unit and information transmitting unit;
Described resource configuration unit, the resource distribution that is used for the wherein N of CMMB radio frames except first a time slot TS0 time slot place is a uplink transmission resource, the resource distribution at other time slot place is the downlink transfer resource; Wherein, N is integer and 1≤N≤39;
Described information transmitting unit is used for the configuration result according to described resource configuration unit, and first time slot TS0 by this radio frames sends to terminal with resource allocation information.
A kind of terminal based on CMMB realization bidirectional data transfers, this terminal comprises: information receiving unit and data transmission unit;
Described information acquisition unit is used for obtaining resource allocation information by first time slot TS0 of CMMB radio frames;
Described data transmission unit, be used for the resource allocation information that obtains according to described information acquisition unit, send upstream data on the resource at the time slot place of the wherein N in described CMMB radio frames except first time slot TS0, downlink data receiving on the resource at other time slot place, wherein, N is integer and 1≤N≤39.
As can be seen from the above technical solutions, the base station is a uplink transmission resource with the resource distribution at the time slot place of the wherein N except first time slot TS0 in the CMMB radio frames among the present invention, the resource distribution at other time slot place is the downlink transfer resource, and first time slot TS0 of resource allocation information by this radio frames sent to terminal.Not only can realize the base station with multimedia data broadcast to each terminal, can realize that also each terminal is sent to the base station with multi-medium data, for example, video camera can be sent to the multi-medium data that collects the Surveillance center with base station functions, the audio, video data of collecting is monitored, perhaps video telephone or video conference terminal etc. are sent to the base station with the multi-medium data that collects and carry out the forwarding of multi-medium data by the base station, thereby realize the multimedia communication of big bandwidth.Obviously, can make that by the present invention the advantage of CMMB is utilized more fully.
Description of drawings
Fig. 1 is the physical frame structure chart of existing CMMB;
A kind of CMMB radio frames resource allocation structure figure that Fig. 2 provides for the embodiment of the invention;
The another kind of CMMB radio frames resource allocation structure figure that Fig. 3 provides for the embodiment of the invention;
The architecture of base station figure that Fig. 4 provides for the embodiment of the invention;
The terminal structure figure that Fig. 5 provides for the embodiment of the invention.
Embodiment
In order to make the purpose, technical solutions and advantages of the present invention clearer, describe the present invention below in conjunction with the drawings and specific embodiments.
Method provided by the invention mainly comprises: with the resource distribution at the time slot place of the wherein N except first time slot TS0 in the CMMB radio frames is uplink transmission resource, other time slot place resource distribution is the downlink transfer resource, and first time slot TS0 of resource allocation information by this radio frames sent to terminal; Wherein, N is integer and 1≤N≤39.
Correspondingly, terminal can be obtained resource allocation information by first time slot TS0 of CMMB radio frames, according to this resource allocation information, send upstream data, downlink data receiving on the resource at other time slot place on the resource at the time slot place of the wherein N in the CMMB radio frames except first time slot TS0.
Said method of the present invention is still based on the CMMB system, and prolong structure with the CMMB radio frames, 40 time slots in original CMMB radio frames are the downlink transfer resource, and first time slot TS0 among the present invention in the CMMB radio frames still fixed configurations is descending CLCH, is used for the bearing downlink control information.This Downlink Control Information can comprise in the present invention: resource allocation information promptly is configured to the gap information of downlink transfer resource and is configured to the gap information of uplink transmission resource.
In addition, in the N that is configured to a uplink transmission resource time slot, can dispose one of them time slot and be used to carry ascending control channel, each terminal is carried out the transmission of control information on this ascending control channel.
Wherein, configuration mode to the downlink transfer resource can adopt multiple mode, for example shown in Figure 2, can with the resource fixed configurations at TS0 place the downlink transfer resource, the resource distribution at TS1 to TS20 place is a uplink transmission resource, wherein, TS1 can be used to carry ascending control information, TS2 to TS20 can be used to carry uplink business data, the resource distribution at TS21 to TS39 place is the downlink transfer resource, the base station can be carried at this resource allocation information carries out broadcast transmission among the TS0, wherein, this resource allocation information can be specially: the up-downgoing switching point, channel allocation information, the adjustment parameter information of physical layer, uplink random access information etc.
Wherein, the up-downgoing switching point is meant uplink transmission resource and switching place in time of downlink transfer resource, and in Fig. 2, the up-downgoing switching point is the intersection of TS20 and TS21; Channel allocation information is meant the channel information of the concrete carrying of each time slot; The adjustment parameter information of physical layer is to be used for terminal and the base station is adjusted synchronously or the information of power adjustment etc., for example launches pre-set time (TA), TPC etc.; The uplink random access information is meant that being used for each terminal in the uplink transmission resource of configuration carries out the resource information that uplink random inserts, for example, some OFDM (OFDM) symbol of TS1 can be fixed for the transmission that terminal is carried out the uplink random access sequence, also the fixed OFDM symbol that is used for each time slot of uplink can be fixed for the transmission that terminal is carried out the uplink random access sequence, promptly can be used to carry the uplink random access sequence at the setting OFDM symbol that the individual time slot that be used for uplink of the N of configuration disposes in M the time slot, wherein, M is integer and 1≤M≤N.Correspondingly, terminal can send the uplink random access sequence and comes access base station on the setting OFDM symbol in this M time slot.
Also can be as shown in Figure 3, the thick arrow that makes progress among Fig. 3 is represented ascending time slot, downward thick arrow is represented descending time slot, can be the downlink transfer resource with the resource distribution at the odd number time slot place in the CMMB radio frames promptly, is uplink transmission resource with the resource distribution at even number time slot place.Certainly, also can adopt other configuration mode, for example can be according to the resource user demand of reality, only need to suppose a time slot just can satisfy the demand of uplink, then can only one of them time slot configuration be used for uplink, for example can be only be uplink transmission resource with the resource distribution at TS 1 place.Other configuration mode uses too, gives unnecessary details no longer one by one at this.
More than be the description that method provided by the present invention is carried out, below base station provided by the present invention and terminal be described in detail respectively.
The architecture of base station figure that Fig. 4 provides for the embodiment of the invention, as shown in Figure 4, this base station can comprise: resource configuration unit 401 and information transmitting unit 402.
Resource configuration unit 401, the resource distribution that is used for the wherein N of CMMB radio frames except first a time slot TS0 time slot place is a uplink transmission resource, the resource distribution at other time slot place is the downlink transfer resource; Wherein, N is integer and 1≤N≤39.
Information transmitting unit 402 is used for the configuration result according to resource configuration unit 401, and first time slot TS0 by this radio frames sends to terminal with resource allocation information.
In addition, this base station can also comprise: resource determining unit 403, be used for determining the value of N according in advance fixed configurations, and perhaps, determine the value of N, and the value of the N that determines is offered resource configuration unit 401 according to the up multi-medium data transmission demand of reality.
Further, resource configuration unit 401, the setting OFDM symbol that can also be used in M time slot of N time slot configuration is used to carry the uplink random access sequence, and wherein, M is integer and 1≤M≤N.
The terminal structure figure that Fig. 5 provides for the embodiment of the invention, as shown in Figure 5, this terminal can comprise: information receiving unit 501 and data transmission unit 502.
Wherein, the upstream data of transmission can be up control information, also can be up multimedia service data.
Further, this terminal can also comprise: access unit 503 at random, are used for the resource allocation information that obtains according to information acquisition unit 501, send the uplink random access sequence in the setting OFDM symbol of M the time slot of setting in N time slot, wherein, M is integer and 1≤M≤N.
By above description as can be seen, the base station is a uplink transmission resource with the resource distribution at the time slot place of the wherein N except first time slot TS0 in the CMMB radio frames among the present invention, the resource distribution at other time slot place is the downlink transfer resource, and first time slot TS0 of resource allocation information by this radio frames sent to terminal.Not only can realize the base station with multimedia data broadcast to each terminal, can realize that also each terminal is sent to the base station with multi-medium data, for example, video camera can be sent to the multi-medium data that collects the Surveillance center with base station functions, the audio, video data of collecting is monitored, perhaps video telephone or video conference terminal etc. are sent to the base station with the multi-medium data that collects and carry out the forwarding of multi-medium data by the base station, thereby realize the multimedia communication of big bandwidth.Obviously, can make that by the present invention the advantage of CMMB is utilized more fully.
The above only is preferred embodiment of the present invention, and is in order to restriction the present invention, within the spirit and principles in the present invention not all, any modification of being made, is equal to replacement, improvement etc., all should be included within the scope of protection of the invention.
Claims (10)
1. method that realizes bidirectional data transfers based on China Mobile multimedia broadcasting CMMB is characterized in that this method comprises:
With the resource distribution at the time slot place of the wherein N except first time slot TS0 in the CMMB radio frames is uplink transmission resource, the resource distribution at other time slot place is the downlink transfer resource, and first time slot TS0 of resource allocation information by this radio frames sent to terminal;
Wherein, N is integer and 1≤N≤39.
2. method according to claim 1 is characterized in that, described N is the predetermined fixed configuration, and perhaps the base station is determined according to the up multi-medium data transmission demand of reality.
3. method according to claim 1, it is characterized in that, described configuration specifically comprises: with the resource distribution at 21 time slot TS20 of second time slot TS1 to the place in the described radio frames is uplink transmission resource, with the resource distribution at 40 time slot TS39 of the 22 time slot TS21 to the place is the downlink transfer resource, and first time slot TS0 is fixed for the transmission of Downlink Control Information; Perhaps,
With the resource distribution at the odd number time slot place in the described radio frames is the downlink transfer resource, is uplink transmission resource with the resource distribution at even number time slot place, and wherein, first time slot TS0 is fixed for the transmission of Downlink Control Information.
4. method according to claim 1 is characterized in that, described resource allocation information comprises: the adjustment parameter information of up-downgoing switching point, channel allocation information, physical layer and uplink random access information.
5. method according to claim 1 is characterized in that, the setting orthogonal frequency division multiplex OFDM symbol in a described N time slot in M time slot of configuration is used to carry the uplink random access sequence, and wherein, M is integer and 1≤M≤N.
6. a base station of realizing bidirectional data transfers based on CMMB is characterized in that this base station comprises: resource configuration unit and information transmitting unit;
Described resource configuration unit, the resource distribution that is used for the wherein N of CMMB radio frames except first a time slot TS0 time slot place is a uplink transmission resource, the resource distribution at other time slot place is the downlink transfer resource; Wherein, N is integer and 1≤N≤39;
Described information transmitting unit is used for the configuration result according to described resource configuration unit, and first time slot TS0 by this radio frames sends to terminal with resource allocation information.
7. base station according to claim 6, it is characterized in that, this base station also comprises: the resource determining unit, be used for determining the value of described N according to fixed configurations in advance, perhaps, determine the value of described N according to the up multi-medium data transmission demand of reality, and the value of the N that determines is offered described resource configuration unit.
8. base station according to claim 6 is characterized in that, described resource configuration unit, and the setting OFDM symbol that also is used in M time slot of described N time slot configuration is used to carry the uplink random access sequence, and wherein, M is integer and 1≤M≤N.
9. a terminal that realizes bidirectional data transfers based on CMMB is characterized in that this terminal comprises: information receiving unit and data transmission unit;
Described information acquisition unit is used for obtaining resource allocation information by first time slot TS0 of CMMB radio frames;
Described data transmission unit, be used for the resource allocation information that obtains according to described information acquisition unit, send upstream data on the resource at the time slot place of the wherein N in described CMMB radio frames except first time slot TS0, downlink data receiving on the resource at other time slot place, wherein, N is integer and 1≤N≤39.
10. terminal according to claim 9, it is characterized in that, this terminal also comprises: access unit at random, be used for the resource allocation information that obtains according to described information acquisition unit, send the uplink random access sequence in the setting OFDM symbol of M the time slot of in a described N time slot, setting, wherein, M is integer and 1≤M≤N.
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| Application Number | Priority Date | Filing Date | Title |
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| CN200910009007A CN101808403A (en) | 2009-02-12 | 2009-02-12 | Method, base station and terminal for realizing bidirectional data transmission based on CMMB (China Mobile Multimedia Broadcasting) |
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| Application Number | Priority Date | Filing Date | Title |
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| CN200910009007A CN101808403A (en) | 2009-02-12 | 2009-02-12 | Method, base station and terminal for realizing bidirectional data transmission based on CMMB (China Mobile Multimedia Broadcasting) |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102075704A (en) * | 2010-12-30 | 2011-05-25 | 北京牡丹电子集团有限责任公司 | Transmitting equipment combined concrete rectangular open caisson basin of CMMB (China Mobile Multimedia Broadcasting) mobile video transmission system and construction method thereof |
| CN102149016A (en) * | 2010-12-30 | 2011-08-10 | 北京牡丹电子集团有限责任公司 | Receiving device for CMMB (China mobile multimedia broadcasting) mobile video transmission system |
| CN102340693A (en) * | 2011-03-23 | 2012-02-01 | 重庆三峡学院 | Method for pushing information in CMMB (China Mobile Multimedia Broadcasting) |
| CN102594438A (en) * | 2011-01-13 | 2012-07-18 | 中兴通讯股份有限公司 | Data transmission method, device and system |
-
2009
- 2009-02-12 CN CN200910009007A patent/CN101808403A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102075704A (en) * | 2010-12-30 | 2011-05-25 | 北京牡丹电子集团有限责任公司 | Transmitting equipment combined concrete rectangular open caisson basin of CMMB (China Mobile Multimedia Broadcasting) mobile video transmission system and construction method thereof |
| CN102149016A (en) * | 2010-12-30 | 2011-08-10 | 北京牡丹电子集团有限责任公司 | Receiving device for CMMB (China mobile multimedia broadcasting) mobile video transmission system |
| CN102594438A (en) * | 2011-01-13 | 2012-07-18 | 中兴通讯股份有限公司 | Data transmission method, device and system |
| CN102594438B (en) * | 2011-01-13 | 2017-03-15 | 中兴通讯股份有限公司 | Data transmission method, apparatus and system |
| CN102340693A (en) * | 2011-03-23 | 2012-02-01 | 重庆三峡学院 | Method for pushing information in CMMB (China Mobile Multimedia Broadcasting) |
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Application publication date: 20100818 |