Method of enhancing system performance and related wireless module

• US 9,413,440 B2
• Filed: 04/22/2015
• Issued: 08/09/2016
• Est. Priority Date: 06/27/2014
• Status: Active Grant

• Current Assignee: Wistron NeWeb Corporation (Wistron Corporation)
• Original Assignee: Wistron NeWeb Corporation (Wistron Corporation)
• Inventors: Ho, Yung-Fa
• Primary Examiner(s): Ahn, Sam K
• Assistant Examiner(s): TIEU, JANICE N
• Application Number:
  US14/692,752
• Publication Number:
  US 20150381245A1
• Time in Patent Office: 475 Days
• Field of Search: 375/260, 375/267, 375/285, 375/295
• US Class Current: 1/1
• CPC Class Codes: H04B 3/32 Reducing cross-talk, e.g. by compensating
• CPC Class Codes: H04B 7/0452 Multi-user MIMO systems
• CPC Class Codes: H04B 7/0617 for beam forming
• CPC Class Codes: H04B 7/0669 using different channel coding between antennas space-time coding H04L1/0618
• CPC Class Codes: H04B 7/0689 using different transmission schemes, at least one of them being a diversity transmission scheme
• CPC Class Codes: H04L 1/0003 by switching between different modulation schemes
• CPC Class Codes: H04L 1/0009 by adapting the channel coding H04L1/1812 takes precedence
• CPC Class Codes: H04L 1/0071 Use of interleaving interleaving per se H03M13/27
• CPC Class Codes: H04L 1/06 using space diversity
• CPC Class Codes: H04L 1/0618 Space-time coding
• CPC Class Codes: H04L 1/0625 Transmitter arrangements
• CPC Class Codes: H04L 25/03343 Arrangements at the transmitter end
• CPC Class Codes: H04L 27/26 Systems using multi-frequency codes H04L27/32 takes precedence
• CPC Class Codes: H04L 27/2647 Arrangements specific to the receiver only equalisation H04L27/01
• CPC Class Codes: H04L 5/0007 the frequencies being orthogonal, e.g. OFDM(A), DMT
• CPC Class Codes: H04W 52/42 in systems with time, space, frequency or polarisation diversity

Abstract

The present disclosure provides a performance enhancement method for a multi-user multiple input multiple output (MIMO) system. The performance enhancement method includes determining whether a connection node of a data stream matches when a transmission packet is waiting for transmission in the data stream, wherein the data stream is dedicated to serving a wireless subscriber, collecting a plurality of radio-frequency parameters and MIMO information when the connection node matches, using a time-division multiple access (TDMA) mechanism to divide the transmission packet into a plurality of sub-packets, applying Space-time block code (STBC) to the sub-packets, and transmitting the encoded sub-packets in one data stream in different time instants.

Claims

1. A method of enhancing performance for a multi-user multiple input multiple output (MIMO) system, the method comprising:

determining whether a connection node of a data stream matches when a transmission packet is waiting for transmission in the data stream, wherein the data stream is dedicated to serve a wireless subscriber;

using a self-training mechanism to collect a plurality of radio-frequency parameters and a MIMO information of the connection node when the connection node matches;

using a time-division multiple access (TDMA) mechanism to divide the transmission packet into a plurality of sub-packets according to the MIMO information;

applying a space-time block code (STBC) to the plurality of sub-packets; and

transmitting the plurality of encoded sub-packets in the data stream at different time instants.

2. The method of claim 1, further comprising:

referring to a connection node table when the connection node does not match; and

obtaining a data stream information of the connection node after the transmission packet being divided into the plurality of sub-packets, and replacing the transmission packet with the plurality of sub-packets to wait for transmission in the data stream.

3. The method of claim 1, wherein the step of using the time-division multiple access (TDMA) mechanism to divide the transmission packet into the plurality of sub-packets according to the MIMO information comprises:

obtaining a size of the transmission packet;

determining whether dividing the transmission packet is completed according to the size of the transmission packet;

determining numbers of the plurality of sub-packets and defining sizes of the plurality of sub-packets according to the MIMO information when dividing the transmission packet is not completed;

dividing the transmission packet into the plurality of sub-packets according to the numbers of the plurality of sub-packets and the sizes of the plurality of sub-packets; and

attaching a time tag on each sub-packet of the plurality of sub-packets.

4. The method of claim 3, wherein the step of transmitting the plurality of encoded sub-packets in the data stream at the different time instants further comprises:

transmitting the plurality of encoded sub-packets sequentially according to the time tag on each of the sub-packet, wherein transmission of two adjacent sub-packets has a delay time.

5. The method of claim 1, wherein the plurality of radio-frequency parameters comprises at least one of a transmission power, a packet error rate, an information rate and a received signal strength indication (RSSI).

6. The method of claim 1, wherein the MIMO information is a MIMO configuration of the wireless subscriber.

7. The method of claim 1, wherein the data stream is formed by a beam or multiple beams.

8. A wireless module, for a multi-user multiple input multiple output (MU-MIMO) system, the wireless module comprising:

at least a connection node, for forming a data stream, wherein the data stream is dedicated to serve a wireless subscriber;

a database, for using a self-training mechanism to collect a plurality of radio-frequency parameters and a MIMO information;

a transmission processing unit, coupled to the database, for dividing the transmission packet into a plurality of sub-packets according to the MIMO information, the transmission processing unit comprising;

a determination unit, for determining numbers of the plurality of sub-packets and defining sizes of the plurality of sub-packets according to the MIMO information when dividing the transmission packet is not completed; and

a time dividing unit, for using a time-division multiple access (TDMA) mechanism to divide the transmission packet into the plurality of sub-packets according to the numbers of the plurality of sub-packets and the sizes of the plurality of sub-packets and attaching a time tag on each sub-packet of the plurality of sub-packets;

an encoding unit, coupled to the transmission processing unit, for applying a space-time block code (STBC) to the plurality of sub-packets; and

a radio-frequency module, coupled to the encoding unit, transmitting the plurality of encoded sub-packets in the data stream at different time instants.

9. The wireless module of claim 8, wherein the radio-frequency module is further utilized for determining whether a connection node of the at least a connection node matches when the transmission packet is waiting for transmission in the data stream.

10. The wireless module of claim 9, further comprising a connection node table, for being referred when the connection node does not match.

11. The wireless module of claim 8, wherein the transmission processing unit is further utilized for obtaining a size of the transmission packet, obtaining a data stream information of the connection node after the transmission packet being divided into the plurality of sub-packets, and replacing the transmission packet with the plurality of sub-packets to wait for transmission in the data stream.

12. The wireless module of claim 11, wherein the determination unit is further utilized for determining whether dividing the transmission packet is completed according to the size of the transmission packet.

13. The wireless module of claim 8, wherein the radio-frequency module is further utilized for transmitting the plurality of encoded sub-packets sequentially according to the time tag on each of the sub-packet, wherein transmission of two adjacent sub-packet has a delay time.

14. The wireless module of claim 8, wherein the plurality of radio-frequency parameters comprises at least one of a transmission power, a packet error rate, an information rate and a received signal strength indication (RSSI).

15. The wireless module of claim 8, wherein the MIMO information is a MIMO configuration of the wireless subscriber.

16. The wireless module of claim 8, wherein the data stream is formed by a beam or multiple beams.

17. A method of enhancing performance for a multi-user multiple input multiple output (MIMO) system, the method comprising:

forming a data stream by a connection node;

using a self-training mechanism to collect a plurality of radio-frequency parameters and a MIMO information of the connection node;

using a time-division multiple access (TDMA) mechanism to divide the transmission packet into a plurality of sub-packets according to the MIMO information;

applying a space-time block code (STBC) to the plurality of sub-packets; and

transmitting the plurality of encoded sub-packets in the data stream at different time instants.

18. The method of claim 17, wherein the MIMO information is a MIMO configuration of the wireless subscriber.