INTEGRATED MULTI-DATASTREAM TRANSMISSION TECHNOLOGY

• US 20120300691A1
• Filed: 12/31/2010
• Published: 11/29/2012
• Est. Priority Date: 02/08/2010
• Status: Active Grant

• Current Assignee: Alcatel-Lucent SA (Nokia Corporation)
• Original Assignee: Alcatel-Lucent SA (Nokia Corporation)
• Inventors: Chao, Hua, Li, Ji, Wang, Yonggang, Hu, Zhongji
• Granted Patent: US 9,054,839 B2
• Time in Patent Office: Days
• US Class Current: 370/312
• CPC Class Codes: H04L 27/3488 Multiresolution systems
• CPC Class Codes: H04L 5/0044 allocation of payload
• CPC Class Codes: H04L 5/0091 Signaling for the administration of the divided path

Abstract

The present invention is related to integrated multi-datastream transmission technology, more particularly, to integrated multi-datastream modulation technology. According to one aspect of the present invention, there is provided a modulation equipment (10), including: a symbol integration means (101), configured to combine a first bit stream with a second bit stream to form a symbol to be modulated; a symbol mapping means (102), configured to map the symbol to be modulated into a QAM modulation symbol according to a set of predetermined mapping rules; wherein, in the set of predetermined mapping rules, multiple constellations corresponding to any first bit stream are located in at least two quadrants in the constellation diagram, while multiple constellations corresponding to any second bit stream are located in at least two quadrants in the constellation diagram. The integrated transmission of a first service data and a second service data (e.g., unicast service data and MBMS data) may be supported and has a better performance than the prior art especially in single cell scenario by using the method, equipment and device in the present invention.

Claims

1. A modulation equipment, comprising:

a symbol integration means, configured to combine a first bit stream with a second bit stream to form a symbol to be modulated;

a symbol mapping means, configured to map the symbol to be modulated into a QAM modulation symbol according to a set of predetermined mapping rules;

wherein, in the set of predetermined mapping rules, multiple constellations corresponding to any first bit stream are located in at least two quadrants in the constellation map, multiple constellations corresponding to any second bit stream are located in at least two quadrants in the constellation map.

2. A modulation equipment according to claim 1, wherein, in the set of predetermined mapping rules, the constellation distribution patterns corresponding to a first bit stream and the constellation distribution patterns corresponding to a second bit stream are symmetrical relative to line y=x or line y=−

x, wherein, x and y represent the coordinate axis in the complex plane of the constellation map.

3. A modulation equipment according to claim 2, wherein, in the set of predetermined mapping rules, patterns constructed by multiple constellations corresponding to any first bit stream or any second bit stream include rectangle or line.

4. A modulation equipment according to claim 1, wherein, the first bit stream includes unicast service data, the second bit stream includes multimedia broadcast multicast service data.

5. A modulation equipment according to claim 4, wherein, the modulation equipment is disposed in single cell scenario.

6. A modulation method, comprising steps of:

combining a first bit stream with a second bit stream to form a symbol to be modulated;

mapping the symbol to be modulated into a QAM modulation symbol according to a set of predetermined mapping rules;

wherein, in the set of predetermined mapping rules, multiple constellations corresponding to any first bit stream are located in at least two quadrants in the constellation map, multiple constellations corresponding to any second bit stream are located in at least two quadrants in the constellation map.

7. A modulation method according to claim 6, wherein, in the set of predetermined mapping rules, the constellation distribution patterns corresponding to a first bit stream and the constellation distribution patterns corresponding to a second bit stream are symmetrical relative to line y=x or line y=−

x, wherein, x and y represent the coordinate axis in the complex plane of the constellation map.

8. A modulation method according to claim 7, wherein, in the set of predetermined mapping rules, patterns constructed by multiple constellations corresponding to any first bit stream or any second bit stream include rectangle or line.

9. A modulation method according to claim 6, wherein, the first bit stream includes unicast service data, the second bit stream includes multimedia broadcast multicast service data.

10. A modulation method according to claim 9, wherein, the modulation method is applied in single cell scenario.

11. A transmitter for transmitting integrated multi-datastream signal, comprising:

a subcarrier mapping equipment, configured to transform first type of service data stream(s) into a first bit stream corresponding to each subcarrier;

a Serial/Parallel converter, configured to transform a second type of service data stream into a second bit stream corresponding to each subcarrier;

a modulation equipment, configured to combine the first bit stream and the second bit stream corresponding to each subcarrier to form a symbol to be modulated, and to map the symbol to be modulated into a QAM modulation symbol according to a set of predetermined mapping rules;

a signal forming equipment, configured to generate OFDM signal according to the QAM symbol in each subcarrier.

12. A transmitter according to claim 11, wherein, the first type of service data includes unicast service data, the second type of service data includes multimedia broadcast multicast service data.

13. A method of transmitting integrated multiple service data in a base station in a wireless communication system, comprising steps of:

broadcasting indication information related to an integrated service data, wherein the indication information includes a set of predetermined mapping rules and the integrated service data includes a first type of service data and a second type of service data;

transmitting the scheduling information of the first type of service and the signaling of the second type of service;

combining a first type of service data and a second type of service data according to the set of predetermined mapping rules, to generate integrated service data;

transmitting the integrated service data.

14. A method according to claim 13, wherein, the first type of service data includes unicast service data, the second type of service data includes multimedia broadcast multicast service data.