CN101425837A - Method and apparatus for bearing information - Google Patents
Method and apparatus for bearing information Download PDFInfo
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- CN101425837A CN101425837A CNA2007101765034A CN200710176503A CN101425837A CN 101425837 A CN101425837 A CN 101425837A CN A2007101765034 A CNA2007101765034 A CN A2007101765034A CN 200710176503 A CN200710176503 A CN 200710176503A CN 101425837 A CN101425837 A CN 101425837A
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- surplus resources
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Abstract
The invention discloses a method of loading information, which is used for a time division duplex system containing a special time slot and comprises the following steps: if a time slot including a special time slot in a subframe has a residual resource, the loading control information and/or data information of a residual resource is used. The invention excellently uses the residual resource of the time slot including the special time slot and avoids resource wastage. The invention also discloses a device of loading information.
Description
Technical field
The present invention relates to the data transmission technology of the communications field, relate in particular to a kind of method of loading information and device.
Background technology
(Time division duplex TDD) has special time slot in the frame structure of system to the part time division duplex, and these special time slots comprise: descending special time slot, uplink special time slot, and the protection time slot between up-downgoing at present.For example, downlink pilot frequency channel time slot (DwPTS), translation and protection time slot (Guard Period, GP) and ascending pilot channel time slot (UpPTS), wherein, DwPTS is used for bearing downlink master sync signal (P-SCH), the minimum middle 1.25MHz bandwidth that takies 1 OFDM (OFDM) symbol; GP is used for the protection interval between the up-downgoing switching point, all takes on frequency domain, can adjust the shared time span of GP according to covering radius; UpPTS is used to carry uplink random access channel (PRACH), the minimum middle 1.25MHz that takies two OFDM symbols.
Along with development of Communication Technique, this TDD system with special time slot need with other TDD coexistence of systems.For example, third generation partner program (The 3rd Generation Partnership Project, (the Long term evaluation of Long Term Evolution standard 3GPP), just there is above-mentioned special time slot in the frame structure of the TDD type 2 LTE) (hereinafter to be referred as type 2), when type 2 coexists with time-division synchronous CDMA system (TD-SCDMA), need adjust the relative length of special time slot in the type 2 according to the uplink and downlink timeslot ratio of TD-SCDMA system, and the time slot relativity shift position between type 2 and TD-SCDMA system, in the special time slot of type 2, will there be certain resource residual amount like this, will do not cause the wasting of resources in addition if rationally do not utilize.
Summary of the invention
The embodiment of the invention provides a kind of method of loading information and device, to solve the problem of the wasting of resources that may exist in the TDD system that exists in the prior art.
A kind of method of loading information is applied to comprise the tdd systems of special time slot, and this method comprises:
If have surplus resources in the time slot of described special time slot place in the subframe, then utilize one or more in described surplus resources bear control information and the data message.
A kind of device of loading information is applied to comprise the tdd systems of special time slot, and this device comprises:
First judge module is used for judging whether described special time slot place time slot exists surplus resources in the subframe;
Carrier module, be used for when judged result when having surplus resources, utilize one or more in described surplus resources bear control information and the data message.
In the embodiment of the invention, when in comprising the time slot of special time slot, having surplus resources, utilize the method for described surplus resources bear control information and/or data message, utilized the surplus resources of the time slot at special time slot place well, avoided the situation of the wasting of resources.
Description of drawings
Fig. 1 is a device of loading information structural representation in the embodiment of the invention one;
Fig. 2 is a method of loading information steps flow chart schematic diagram in the embodiment of the invention two;
Fig. 3 takies the distribution schematic diagram of OFDM symbol for three special time slots in the embodiment of the invention two.
Embodiment
Below in conjunction with Figure of description, describe the embodiment of the invention in detail.
As shown in Figure 1, be device of loading information structural representation in the embodiment of the invention one, this device can be applied in the transmitting terminal (as the base station), comprise first judge module 11 and carrier module 12, wherein, first judge module 11 is used for judging whether described special time slot place time slot exists surplus resources in the subframe; Carrier module 12 be used for when judged result when having surplus resources, utilize one or more in described surplus resources bear control information and the data message.
Beared information comprises up/downlink bearing, then carrier module 12 comprises downlink bearing module 13 and up carrier module 14, wherein, downlink bearing module 13 is used for utilizing the one or more of control information of described surplus resources downlink bearing and data message; Up carrier module 14 is used for utilizing the one or more of up bear control information of described surplus resources and data message.
Data message is carried out downlink or uplink when carrying, need dispatch bearing resource, then described device also comprises scheduler module 15, is used for when utilizing described surplus resources carry data information described surplus resources independently being dispatched; Perhaps with the subframe at surplus resources place in downlink or uplink time slot binding scheduling; Perhaps with the subframe at surplus resources place in the downlink or uplink time slot in OFDM symbol binding scheduling.
Knot and specific embodiment are described the inventive method in detail below.
As shown in Figure 2, be method of loading information steps flow chart schematic diagram among the embodiment two of the embodiment of the invention one correspondence, in the present embodiment, set and carry out downlink bearing earlier that carry out up carrying again, as can be seen from the figure this method may further comprise the steps:
Step 201: judge in the subframe whether have remaining downlink resource in the time slot of special time slot place, if then execution in step 202; Otherwise, execution in step 206.
Scheme described in various embodiments of the present invention all is based on the TDD system that comprises special time slot, and described special time slot is DwPTS, GP and UpPTS.TDD system with these three special time slots for other TDD coexistence of systems, need uplink and downlink timeslot ratio according to existing TDD system, adjust the uplink and downlink timeslot ratio of self, the relative scale of special time slot, and two relative positions between the system frame structure, avoid existing between two systems cross time-slot to disturb.After adjusting the relative scale of three special time slots, may have surplus resources in the time slot of the subframe at this special time slot place.
In various embodiments of the present invention, related remaining downlink resource and remaining ascending resource can be referred to as surplus resources.
Step 202: utilize described remaining downlink resource bear control information.
Described control information comprises: one or more in modulation coding mode that base station IDs, synchronizing information, link ID, number of links, each link resources original position, each link resources number, Resource Block are used and the Resource Block number of repetition.
Step 203:, then utilize described remaining downlink resource carry data information if the control information of carrying does not have the described remaining downlink resource of full consumption.
If described remaining downlink resource carry data information, then described remaining downlink resource is independent scheduling, perhaps with the subframe at self place in descending time slot binding scheduling, perhaps with the subframe at self place in descending time slot in OFDM symbol binding scheduling.
For example, if a time slot is 1ms, be about 14 OFDM symbols, remaining downlink resource is 9 OFDM symbols, then with afterwards a descending time slot in 5 OFDM symbols binding scheduling, form a logic time slot after crossing over time slot.
The sequencing of step 202 and step 203 is can be unfixed, and comprehensively user's demand and the optimization of system self information carrying of system reasonably distributes the remaining downlink resource of bear control information and data message.
Step 204: judge in the subframe whether have remaining ascending resource in the time slot of described special time slot place, if then execution in step 205, otherwise, execution in step 206.
Step 205: utilize described remaining ascending resource bear control information and/or data message.
When carry data information, described remaining ascending resource is independent scheduling, perhaps with the subframe at self place in ascending time slot binding scheduling, perhaps with the subframe at self place in ascending time slot in OFDM symbol binding scheduling.
Step 206: carry out regular traffic.
So-called regular traffic can be the business of the remaining uplink and downlink resource execution of unfavorable usefulness.For example, utilize other normal time slot downlink bearing general service information and utilize the up carrying general service of other normal time slots information.
To step 206, finished the process of once utilizing surplus resources bear control information and/or data message by step 201.
Specify below in step 201, judge the scheme that whether has surplus resources in the time slot of subframe at special time slot place.
A subframe lengths that has in the TDD system of three special time slots is 5ms, contains 5 isometric time slots, comprises three special time slot: DwPTS in second time slot wherein, GP, and UpPTS, other time slot can further be split as the sub-slots of two 0.5ms.The P-SCH of DwPTS carrying takies 1 OFDM symbol (about 71.875us) at least on time domain, on frequency domain, and the 1.25MHz in the middle of P-SCH takies in the carrier bandwidths, if the corresponding 10MHz bandwidth of OFDM, then P-SCH takies 1/8 bandwidth of an OFDM symbol.In the present embodiment, GP can take two OFDM symbols (about 143.2us) on time domain.The PRACH of UpPTS carrying takies the part of 2 OFDM symbols (about 143.2us) at least on time domain, similar with the situation of DwPTS, takies 1.25MHz middle in the carrier bandwidths on frequency domain at least.
Because the length of 1 time slot is 1ms, under short CP configuration, be approximately 14 OFDM symbols, therefore, surplus resources comprises that 14 OFDM symbols deduct the resource that DwPTS, GP and the original beared information of UpPTS take, be the P-SCH that carries among the aforementioned DwPTS, the resource that the PRACH that carries among GP and the UpPTS is shared.
Under common coverage radius of cell, TDD system with three special time slots can adopt short CP configuration, promptly the CP length of the first OFDM symbol in the sub-slots of a 0.5ms is 5.21us, the CP length of all the other 6 OFDM symbols is 4.69us, be called short CP configuration, at this moment, the integer OFDM in the surplus resources in the special time slot can be 9 at most; But under some scene, need to support bigger coverage radius of cell, can increase the cyclic prefix CP length in each OFDM symbol this moment is 16.67us, is called long CP configuration, and at this moment, the OFDM of the integer in the surplus resources can be 7 at most.Long and short CP configuration can influence the size of surplus resources in the special time slot.
As shown in table 1, under short CP situation, the descending and ascending time slot ratio of TD-SCDMA not simultaneously, the situation of the size distribution of surplus resources in the TDD system.As can be seen from Table 1, when the ratio of the descending and ascending time slot of TD-SCDMA is 4:3, DwPTS has more surplus resources, as shown in Figure 3, DwPTS takies 10 OFDM symbols, UpPTS takies 2 OFDM symbols, and therefore, the resource that is used for downlink bearing in the surplus resources is: all the other all available subcarriers in the middle of 9 integer OFDM symbols and being used to carry on the OFDM symbol of P-SCH outside the 1.25MHz bandwidth; The resource that is used for up carrying in the surplus resources is: 0 integer OFDM symbol and being used to carries remaining available subcarrier on two OFDM symbols of PRACH, and wherein, PRACH takies 1.25MHz or 2.5MHz, even more.
When the ratio of the descending and ascending time slot of TD-SCDMA is 6:1, DwPTS takies 1 OFDM symbol, UpPTS takies 11 OFDM symbols, therefore, the resource that is used for downlink bearing in the surplus resources is: all the other all available subcarriers in the middle of 0 integer OFDM symbol and being used to carries on the OFDM symbol of P-SCH outside the 1.25MHz bandwidth; The resource that is used for up carrying in the surplus resources is: 9 integer OFDM symbols and being used to carry remaining available subcarrier on two OFDM symbols of PRACH, and wherein, PRACH takies 1.25MHz or 2.5MHz, even more.
When the ratio of the descending and ascending time slot of TD-SCDMA was 5:2, the resource that is used for downlink bearing in the surplus resources was: all the other all available subcarriers in the middle of 5 integer OFDM symbols and being used to carry on the OFDM symbol of P-SCH outside the 1.25MHz bandwidth; The resource that is used for up carrying in the surplus resources is: 4 integer OFDM symbols and being used to carry remaining available subcarrier on two OFDM symbols of PRACH, and wherein, PRACH takies 1.25MHz or 2.5MHz, even more.
Table 1
As shown in table 2, under long CP situation, TD-SCDMA's is descending different with the ascending time slot ratio, the situation of the size distribution of surplus resources in the TDD system.Concrete distribution is similar with the situation of table 1.
Table 2
In addition, carry the shared OFDM symbol difference of different control informations, correspond on the frequency domain, the bit number difference that promptly takies, as shown in table 3, provide several control informations shared bit number.
| Title | Bit number | Describe |
| BS_ID | 16～64 bits | Base station identifier |
| SYN_IF | 8～32 bits | Synchronizing information |
| CN_ID | 8～16 bits | Link identifiers |
| Num_CN | 8～16 bits | Number of links |
| RE_CN | 8～16 bits | Link resources original position (downlink resource or ascending resource) |
| TFC | 4～16 bits | Transformat: modulation coding mode |
| REP_NUM | 2～4 bits | Number of repetition |
| ... | ... | ... |
Table 3
By method and the device that the embodiment of the invention provides, utilized the surplus resources of the time slot at special time slot place well, avoided the wasting of resources.
Obviously, those skilled in the art can carry out various changes and modification to the present invention and not break away from the spirit and scope of the present invention.Like this, if of the present invention these are revised and modification belongs within the scope of claim of the present invention and equivalent technologies thereof, then the present invention also is intended to comprise these changes and modification interior.
Claims (7)
1, a kind of method of loading information is applied to comprise the tdd systems of special time slot, it is characterized in that this method comprises:
If have surplus resources in the time slot of described special time slot place in the subframe, then utilize one or more in described surplus resources bear control information and the data message.
2, the method for claim 1, it is characterized in that, when utilizing described surplus resources carry data information, described surplus resources is independent scheduling, perhaps with the subframe at self place in time slot binding scheduling, perhaps with the subframe at self place in time slot in OFDM symbol binding scheduling.
3, the method for claim 1 is characterized in that, described surplus resources comprises one or more in remaining downlink resource and the remaining ascending resource.
4, the method for claim 1, it is characterized in that described control information comprises: one or more in modulation coding mode that transmitting terminal ID, synchronizing information, link ID, number of links, each link resources original position, each link resources number, Resource Block use and the Resource Block number of repetition.
5, a kind of device of loading information is applied to comprise the tdd systems of special time slot, it is characterized in that this device comprises:
First judge module is used for judging whether described special time slot place time slot exists surplus resources in the subframe;
Carrier module, be used for when judged result when having surplus resources, utilize one or more in described surplus resources bear control information and the data message.
6, device as claimed in claim 5 is characterized in that, described device also comprises:
Scheduler module is used for when utilizing described surplus resources carry data information described surplus resources independently being dispatched; Perhaps
With the time slot binding scheduling in the subframe at surplus resources place; Perhaps
OFDM symbol binding scheduling with time slot in the subframe at surplus resources place.
7, device as claimed in claim 5 is characterized in that, described carrier module comprises:
The downlink bearing module is used for utilizing the one or more of control information of described surplus resources downlink bearing and data message;
Up carrier module is used for utilizing the one or more of up bear control information of described surplus resources and data message.
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| CN2007101765034A CN101425837B (en) | 2007-10-29 | 2007-10-29 | Method and apparatus for bearing information |
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| CN2007101765034A CN101425837B (en) | 2007-10-29 | 2007-10-29 | Method and apparatus for bearing information |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017075822A1 (en) * | 2015-11-06 | 2017-05-11 | 华为技术有限公司 | Method for data transmission, access network device, and user equipment |
| CN108401293A (en) * | 2017-02-04 | 2018-08-14 | 展讯通信（上海）有限公司 | Dispatching method, application method and the device of the surplus resources of synchronizing signal block |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1905428B (en) * | 2005-07-25 | 2010-08-18 | 上海原动力通信科技有限公司 | Transmission method of TDD mobile communication system with low delay character |
| CN101389053B (en) * | 2007-09-11 | 2011-08-31 | 电信科学技术研究院 | Multimedia broadcast multicast service transmission method and system |
| CN101415226B (en) * | 2007-10-15 | 2010-06-23 | 大唐移动通信设备有限公司 | Method and apparatus for improving down pilot time slot resource utilization ratio of TDD system |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017075822A1 (en) * | 2015-11-06 | 2017-05-11 | 华为技术有限公司 | Method for data transmission, access network device, and user equipment |
| CN108401293A (en) * | 2017-02-04 | 2018-08-14 | 展讯通信（上海）有限公司 | Dispatching method, application method and the device of the surplus resources of synchronizing signal block |
| CN108401293B (en) * | 2017-02-04 | 2021-10-22 | 展讯通信（上海）有限公司 | Scheduling method, using method and device for residual resources of synchronous signal block |
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