CN102461166B

CN102461166B - Multicast broadcast services in wireless communication system is carried out the technology of hierarchical coding

Info

Publication number: CN102461166B
Application number: CN201080027690.XA
Authority: CN
Inventors: H·牛; Y·张; C·徐
Original assignee: Intel Corp
Current assignee: Intel Corp
Priority date: 2009-06-17
Filing date: 2010-06-01
Publication date: 2016-12-14
Anticipated expiration: 2030-06-01

Abstract

Embodiments of the invention provide a kind of equipment, and it includes the transceiver being suitable to that the multicast broadcast services (MBS) in wireless network carries out hierarchical coding, and wherein hierarchical coding is provided by supercomposed coding so that data stream provides the protection of different stage.

Description

Multicast broadcast services in wireless communication system is carried out the technology of hierarchical coding

Background technology

Current broadcast standard is generally supported hierarchical coding.In broadcast system, capacity is usual Limited by the worst user in overlay area.By utilizing hierarchical coding, there is limited noise Low quality video is received only than the user of (SNR).There is available point of the user of high SNR Level coding receives high-quality.Therefore, total MBS capacity is improved.

The current techniques being supported hierarchical coding by hierarchical modulation is only limited to single-input single-output (SISO) transmission.Such as, 16QAM constellation used in DVB-T has 3 kinds of forms, That is, one non-layered constellation and two layering constellations for hierarchical coding, such as 100 in Fig. 1 Shown in 200 in Fig. 2.The one 110 layering 16QAM that Fig. 1 describes in DVB-T adjusts Form processed, Fig. 2 describes the 2nd 210 layering 16QAM modulation format in DVB-T； Also defining similar layering constellation in MediaFLO standard, the most simply the ratio of constellation is slightly Micro-change.Layering constellation is that broadcast service provides basic improvement.Restriction is: (1) According to the definition in DVB-T and MediaFLO, only two self adaptation levels can use；And (2) it uses only in the case of single transmission antenna.

Therefore, strong needs is used for the multicast broadcast services in wireless communication system is carried out classification The technology of the improvement of coding.

Accompanying drawing explanation

The ending of description particularly points out and is considered as subject of the present invention and is distinctly claimed it Right.But, described in detail below by reading in conjunction with the accompanying, the present invention can be best understood Tissue and operational approach and objects, features and advantages thereof, in accompanying drawing:

Fig. 1 describes the layering 16QAM modulation format 1 in DVB-T；

Fig. 2 describes the layering 16QAM modulation format in DVB-T；

Fig. 3 describes the transmission figure of hierarchical coding according to an embodiment of the invention；

Fig. 4 describes connecing of the interference elimination of good according to an embodiment of the invention SNR user Receive figure；And

Fig. 5 illustrates the reception figure of the poorest SNR user.

It will be appreciated that in order to simple and clearly demonstrate, the element shown in figure is not necessarily to scale Draw.Such as, for clarity sake, the size of some elements has been exaggerated relative to other element. Additionally, in the case of considering appropriate, figure is reused reference to indicate correspondence or class As element.

Detailed description of the invention

In the following detailed description, numerous detail is elaborated to fully understand the present invention. But, it will be apparent to those skilled in the art that and not have these details also can realize the present invention. In other cases, it is not described in known method, process, assembly and circuit, in order to avoid Make the present invention hard to understand.

Utilize such as " process ", " calculating ", " calculation ", " determination ", " foundation ", " analyze ", the discussion of the term such as " inspection " can refer to handle the depositor being expressed as computer And/or the data measured of the physics (such as electronics) in memorizer and/or these data are transformed to class As be expressed as the depositor of computer and/or memorizer or other can store instruction to perform The computer of other data of physical quantity in the information storage medium of operation and/or process, calculating Platform, calculating system or the operation of other computing electronics and/or process, but the reality of the present invention Execute example unrestricted in this regard.

Term used herein " a plurality of (plurality/a plurality) " can include such as " many Individual " or " two or more ", but embodiments of the invention are unrestricted in this regard. Entire description can use term " a plurality of (plurality/a plurality) " describe two Individual or two or more assembly, device, element, unit, parameter etc..Such as, " a plurality of station " Two or more stations can be included.

Hierarchical modulation is a kind of special circumstances of supercomposed coding in general sense.Supercomposed coding warp Confirm to can reach the broadcast capacity comparable with TDM and FDM, and be for multiplexing broadcast Service and the scheme of unicast services.But, there are some restrictions for MBS/ clean culture supercomposed coding, Such as: (1) has higher cost for only having the device of unicast services；(2) For unicast services, owing to MBS transmission cycle is the longest, so having big delaying The delay deposited and grow；And (3) need different pilot tones due to MBS and unicast services, because of And totally there is big pilot-frequency expense；Etc..

Embodiments of the invention provide and utilize supercomposed coding to carry out the data stream to such as mpeg stream The protection of different stage is provided.But the present invention is unrestricted in this regard.

Embodiments of the invention provide the base of a kind of hierarchical coding for supporting in wireless network In the scheme of supercomposed coding, wireless network can be such as in accordance with Institute of Electrical and Electric Engineers (IEEE) 802.16m MBS network carries out the network operated.The present invention can utilize in network Big Signal to Interference plus Noise Ratio (SINR) changes in distribution.Embodiments of the invention can utilize bigger merit Rate transmits high priority bit from base station (BS), and utilizes less power to pass from base station (BS) Send low priority position.For having the user of limited SINR away from base station, will only decode height Priority flow.Low priority position is considered noise, it far below noise floor and thus without Make performance degradation.For having the good user of high SINR, can first decode high priority flows, In the case, Main Noise Sources is low priority flows.Then, from transmission, height is deleted preferential Level stream, and decode low priority flows owing to having high SINR level with high reliability.

Referring now to Fig. 3 (being shown generally as 300), Fig. 3 is the block diagram transmitting side.In Fig. 4 400 Reception (Rx) figure of the good user with high SINR is shown.Interference is utilized to eliminate, well User can receive important stream and hardly important stream to realize high video quality.In Fig. 5 The 500 typical reception figures illustrating the poor user with low SINR.The most only receive high priority Stream, and therefore there is lower quality video.

Embodiments of the invention have several main advantage relative to hierarchical modulating method: (1) It is not limited solely to two-stage cascade protection.By adjusting high priority flows and the power of low priority flows Level, can realize multi-level hierarchical protection.(2) it can be used together with MIMO transmission, and this is Key request in IEEE 802.16m deployment.(3) high priority flows and low priority flows are long Degree can very have retractility based on application and source code decoder, because each priority flow Coded/modulated separately specify.

Although it is shown and described herein that some feature of the present invention, but those skilled in the art It is contemplated that many is revised, replaces, is changed and equivalent.Thus, it will be understood that enclose, right is wanted Ask and to contain all these modifications and changes fallen within the true spirit of the invention.

Claims

1. for the multicast broadcast services in wireless communication system being carried out an equipment for hierarchical coding, including:

Being suitable to carry out the multicast broadcast services (MBS) in wireless network the transceiver of hierarchical coding, wherein said hierarchical coding is provided by supercomposed coding so that data stream provides the protection of different stage；

Wherein said transceiver can operate as the base station in described wireless network, and transmits high priority bit with high power, and transmits low priority position with low-power.

2. equipment as claimed in claim 1, wherein said base station can be operable to communicate with movement station MS, and the MS wherein away from described base station with limited Signal to Interference plus Noise Ratio SINR will only decode high priority flows, and low priority flows is then considered noise.

3. equipment as claimed in claim 2, wherein for having the MS of high SINR, first described base station decodes high priority flows, in the case, Main Noise Sources is described low priority flows, then from transmission, delete described high priority flows, and decode described low priority flows owing to having high SINR level with high reliability.

4. for the method that the multicast broadcast services in wireless communication system is carried out hierarchical coding, including:

Hierarchical coding, wherein said hierarchical coding is utilized to be provided by supercomposed coding so that data stream provides the protection of different stage by being suitable to the transceiver of the multicast broadcast services (MBS) in wireless network, and

Also include operating described transceiver as the base station in described wireless network, and transmit high priority bit with high power, and transmit low priority position with low-power.

5. method as claimed in claim 4, also includes operating described base station to communicate with movement station MS, and the MS wherein away from described base station with limited Signal to Interference plus Noise Ratio SINR will only decode high priority flows, and low priority flows is then considered noise.

6. method as claimed in claim 5, wherein for having the MS of high SINR, first described base station decodes high priority flows, in the case, Main Noise Sources is described low priority flows, then from transmission, delete described high priority flows, and decode described low priority flows owing to having high SINR level with high reliability.

7. for the multicast broadcast services in wireless communication system being carried out an equipment for hierarchical coding, including:

For utilizing the parts of hierarchical coding by being suitable to the transceiver of the multicast broadcast services (MBS) in wireless network, wherein said hierarchical coding is provided by supercomposed coding so that data stream provides the protection of different stage, and

Also include for described transceiver is operated as the base station in described wireless network, and transmit high priority bit with high power, and transmit the parts of low priority position with low-power.

8. equipment as claimed in claim 7, also include extra instruction, described extra instruction provides following operation: operate described base station to communicate with movement station MS, and the MS wherein away from described base station with limited Signal to Interference plus Noise Ratio SINR will only decode high priority flows, and low priority flows is then considered noise.

9. equipment as claimed in claim 8, wherein for having the MS of high SINR, first described base station decodes high priority flows, in the case, Main Noise Sources is described low priority flows, then from transmission, delete described high priority flows, and decode described low priority flows owing to having high SINR level with high reliability.