# US 10,484,057 B2 · System and method for coordinating multiple wireless communications devices in a wireless communications network

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- Number: US 10,484,057 B2
- Document ID: US10484057B2
- Status: Granted
- Kind: B2
- Application number: 15/481,684
- Filed: 2017-04-07
- Published: 2017-07-27
- Granted: 2019-11-19
- Earliest claimed: 2010-07-13
- Assignees: MediaTek Singapore Pte. Ltd.
- Applicants: MediaTek Singapore Pte. Ltd.
- Inventors: Chao-Chun Wang; Chih-Shi Yee
- Web page: https://patentgrep.com/patent/US10484057B2

## CPC

- H04B 7/0452: Multi-user MIMO systems
- H04B 7/024: Co-operative use of antennas of several sites, e.g. in co-ordinated multipoint or co-operative multiple-input multiple-output [MIMO] systems
- H04J 11/003: {at the transmitter (transmission to multiple receive units in multiple input multiple output [MIMO] H04B7/0452; transmit antenna weighting H04B7/0615)}
- H04L 5/0023: {Time-frequency-space}
- H04L 5/0037: {Inter-user or inter-terminal allocation}
- H04L 5/0007: {the frequencies being orthogonal, e.g. OFDM(A) or DMT}
- H04W 72/0453: Resources in frequency domain, e.g. a carrier in FDMA
- H04W 74/0816: with collision avoidance
- H04B: TRANSMISSION
- H04J: MULTIPLEX COMMUNICATION (transmission in general H04B; peculiar to transmission of digital information H04L5/00; systems for the simultaneous or sequential transmission of more than one television signal H04N7/08; in exchanges H04Q11/00; stereophonic systems H04S)
- H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M)
- H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72)

## Abstract

A method for allocating radio resources by a coordinating wireless communications device in a wireless communications network including a plurality of wireless communications devices includes: obtaining a plurality of supported narrow-band channels in the wireless communications network; selecting a primary channel from the supported narrow-band channels and using the primary channel to communicate with the plurality of wireless communications devices; organizing the plurality of wireless communications devices into one or more communication groups; and assigning one of the one or more communication group a non-overlapping operating channel for multi-user multiple-input multiple-output (MU MIMO) communication with the coordinating wireless communications device.

## Claims

### Claim 1

A method for allocating radio resources by a coordinating wireless communications device in a wireless communications network including a plurality of wireless communications devices, the method comprising:
obtaining a plurality of supported narrow-band channels in the wireless communications network;
selecting a primary channel from the supported narrow-band channels and using the primary channel to communicate with the plurality of wireless communications devices;
organizing the plurality of wireless communications devices into one or more communication groups;
assigning one of the one or more communication groups a non-overlapping operating channel for multi-user down-link multiple-input multiple-output (MU DL MIMO) operation with the coordinating wireless communications device, wherein the non-overlapping operating channel contains at least two of the plurality of supported narrow-band channels in a coalesced manner in frequency domain; and
assigning another one of the one or more communication groups another non-overlapping operating channel for multi-user up-link multiple-input multiple-output (MU UL MIMO) operation with the coordinating wireless communications device, wherein the another non-overlapping operating channel contains at least two of the plurality of supported narrow-band channels in a coalesced manner in the frequency domain;
wherein communication on the non-overlapping operating channel for the MU DL MIMO operation and communication on the another non-overlapping operating channel for the MU UL MIMO operation are concurrent, wherein the bandwidth of each of the non-overlapping operating channel and the another non-overlapping operating channel is determined based on at least one parameter selected from a group comprising the availability of the number of the supported narrow-band channels, the level of the interference of each supported narrow-band channel, and the respective supported narrow-band channels supported by each of the wireless communications device, and the bandwidth of at least one of the non-overlapping operating channel and the another non-overlapping operating channel is less than a sum of the bandwidths of the plurality of supported narrow-band channels.

### Claim 2 (depends on 1)

The method of claim 1, wherein the selecting of the primary channel is based on parameters selected from a group comprising an availability number of the narrow-band channels, an interference level of each of the narrow-band channels and the respective supported narrow-band channels supported by each of the wireless communications device.

### Claim 3 (depends on 1)

The method of claim 1, wherein the organizing step is based on algorithms selected from a group comprising a best fit algorithm, a first fit algorithm, a population of non-overlapping operating channel and application requirements.

### Claim 4 (depends on 1)

The method of claim 1, wherein the assigning step is either static or dynamic.

### Claim 5 (depends on 1)

The method of claim 1, wherein in the assigning step, channel access of the allocated wireless communications device is determined based on a carrier sensing collision avoidance algorithm, a request based algorithm or a mix thereof.

### Claim 6 (depends on 1)

The method of claim 1, further comprising,
assigning a second one of the one or more communication group another non-overlapping operating channel for multi-user down-link orthogonal frequency-division multiple access (MU DL OFDMA) operation with the coordinating wireless communications device; and
assigning another second one of the one or more communication group another non-overlapping operating channel for multi-user up-link orthogonal frequency-division multiple access (MU UL OFDMA) operation with the coordinating wireless communications device,
wherein communication on the another non-overlapping operating channel for the MU DL OFDMA operation and communication on the another non-overlapping operating channel for the MU UL OFDMA operation are concurrent.

### Claim 7 (depends on 1)

The method of claim 1, further comprising,
assigning a second one of the one or more communication group another non-overlapping operating channel for multi-user down-link frequency domain multiplexing (MU DL FDM) operation with the coordinating wireless communications device; and
assigning another second one of the one or more communication group another non-overlapping operating channel for multi-user up-link frequency domain multiplexing (MU UL FDM) operation with the coordinating wireless communications device,
wherein communication on the another non-overlapping operating channel for the MU DL FDM operation and communication on the another non-overlapping operating channel for the MU UL FDM operation are concurrent.

### Claim 8

A wireless communications network including:
a coordinating wireless communications device; and
a plurality of wireless communications devices, coordinated by the coordinating wireless communications device;
wherein:
the coordinating wireless communications device obtains a plurality of supported narrow-band channels in the wireless communications network;
the coordinating wireless communications device selects a primary channel from the supported narrow-band channels and using the primary channel to communicate with the plurality of wireless communications devices;
the coordinating wireless communications device organizes the plurality of wireless communications devices into one or more communication groups; and
the coordinating wireless communications device assigns one of the one or more communication groups a non-overlapping operating channel for multi-user down-link multiple-input multiple-output (MU DL MIMO) operation with the coordinating wireless communications device, wherein the non-overlapping operating channel contains at least two of the plurality of supported narrow-band channels in a coalesced manner in frequency domain; and
the coordinating wireless communications device assigns another one of the one or more communication groups another non-overlapping operating channel for multi-user up-link multiple-input multiple-output (MU UL MIMO) operation with the coordinating wireless communications device, wherein the another non-overlapping operating channel contains at least two of the plurality of supported narrow-band channels in a coalesced manner in the frequency domain,
wherein communication on the non-overlapping operating channel for the MU DL MIMO operation and communication on the another non-overlapping operating channel for the MU UL MIMO operation are concurrent, wherein the bandwidth of each of the non-overlapping operating channel and the another non-overlapping operating channel is determined based on at least one parameter selected from a group comprising the availability of the number of the supported narrow-band channels, the level of the interference of each supported narrow-band channel, and the respective supported narrow-band channels supported by each of the wireless communications device, and the bandwidth of at least one of the non-overlapping operating channel and the another non-overlapping operating channel is less than a sum of the bandwidths of the plurality of supported narrow-band channels.

### Claim 9 (depends on 8)

The wireless communications network of claim 8, wherein the coordinating wireless communications device selects the primary channel based on parameters selected from a group comprising an availability number of the narrow-band channels, an interference level of each of the narrow-band channels and the respective supported narrow-band channels supported by each of the wireless communications device.

### Claim 10 (depends on 8)

The wireless communications network of claim 8, wherein the coordinating wireless communications device organizes the plurality of wireless communications devices based on algorithms selected from a group comprising a best fit algorithm, a first fit algorithm, a population of non-overlapping operating channel and application requirements.

### Claim 11 (depends on 8)

The wireless communications network of claim 8, wherein the coordinating wireless communications device assigns either statically or dynamically.

### Claim 12 (depends on 8)

The wireless communications network of claim 8, wherein in assign by the coordinating wireless communications device, channel access of the allocated wireless communications device is determined based on a carrier sensing collision avoidance algorithm, a request based algorithm or a mix thereof.

### Claim 13 (depends on 8)

The wireless communications network of claim 8, wherein
the coordinating wireless communications device assigns a second one of the one or more communication group another non-overlapping operating channel for multi-user down-link orthogonal frequency-division multiple access (MU DL OFDMA) operation with the coordinating wireless communications device; and
the coordinating wireless communications device assigns another second one of the one or more communication group another non-overlapping operating channel for multi-user up-link orthogonal frequency-division multiple access (MU UL OFDMA) operation with the coordinating wireless communications device,
wherein communication on the another non-overlapping operating channel for the MU DL OFDMA operation and communication on the another non-overlapping operating channel for the MU UL OFDMA operation are concurrent.

### Claim 14 (depends on 8)

The wireless communications network of claim 8, wherein
the coordinating wireless communications device assigns a second one of the one or more communication group another non-overlapping operating channel for multi-user down-link frequency domain multiplexing (MU DL FDM) operation with the coordinating wireless communications device;
the coordinating wireless communications device assigns another second one of the one or more communication group another non-overlapping operating channel for multi-user up-link frequency domain multiplexing (MU UL FDM) operation with the coordinating wireless communications device,
wherein communication on the another non-overlapping operating channel for the MU DL FDM operation and communication on the another non-overlapping operating channel for the MU UL FDM operation are concurrent.