# US 10,375,677 B2 · Method and system for allocating media access control layer resources in a wireless communication environment

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- Number: US 10,375,677 B2
- Document ID: US10375677B2
- Status: Granted
- Kind: B2
- Application number: 14/494,659
- Filed: 2014-09-24
- Published: 2015-01-08
- Granted: 2019-08-06
- Earliest claimed: 2005-05-19
- Assignees: Apple Inc.
- Applicants: Apple Inc.
- Inventors: Hang Zhang; Jianglei Ma; Ming Jia; Mo-Han Fong; Peiying Zhu; Wen Tong
- Web page: https://patentgrep.com/patent/US10375677B2

## CPC

- H04W 72/20: Control channels or signalling for resource management
- H04B 7/0413: MIMO systems
- H04L 1/1887: {Scheduling and prioritising arrangements}
- H04L 12/185: {with management of multicast group membership}
- H04L 27/2627: {Modulators}
- H04L 61/5069: for group communication, multicast communication or broadcast communication
- H04W 4/08: User group management
- H04W 48/10: using broadcasted information
- H04W 72/04: Wireless resource allocation
- H04W 72/30: Resource management for broadcast services
- H04W 74/004: {in the uplink, i.e. towards network}
- H04W 74/006: {in the downlink, i.e. towards the terminal}
- H04L 5/023: {Multiplexing of multicarrier modulation signals, e.g. multi-user orthogonal frequency division multiple access [OFDMA] (multicarrier modulation H04L27/2601)}
- Y02D 30/00: Reducing energy consumption in communication networks
- H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72)
- H04B: TRANSMISSION
- H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M)
- Y02D: CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE

## Abstract

A method and system for allocating shareable wireless transmission resources. A resource pool is established. The resource pool is divided into a plurality of physical layer allocation units usable for wirelessly transmitting control information and traffic data. The allocation units are assigned at the media access control layer for the wireless transmission of the control information and traffic data. The system and method of the present invention also allows mobile stations to be dynamically grouped into multicast groupings to reduce system overhead resource requirements.

## Claims

### Claim 1

A method of portioning wireless transmission resources, the method comprising:
at a base station:
establishing an uplink resource pool in a first time interval, the uplink resource pool being divided into a plurality of physical layer allocation units usable for wirelessly transmitting control and traffic data from mobile stations; wherein the physical layer of the uplink is based on a broadband orthogonal frequency domain multiplexing (OFDM) technology;
partitioning the allocation units of the uplink resource pool, wherein the resource partitioning is a temporary arrangement transmitted in at least one system information message, wherein the resource partitioning configuration includes at least partitions of:
one or more feedback partitions configurable to receive at least channel quality feedback, feedback related to multiple input multiple output (MIMO) operation, and hybrid automatic repeat request (HARD) feedback at the base station from one or more mobile stations; and
a first signaling partition configurable to receive signaling at the base station from one or more mobile stations, where the signaling is used for at least performing a uplink timing adjustment for mobile station transmissions;
adding a mobile station to a first multicast group based on a common parameter, wherein the first multicast group is defined by a first multicast group ID, wherein the first multicast group ID is defined by the base station for temporarily grouping mobile stations sharing the common parameter and a particular packet type, service, or mobile station state;
transmitting an uplink resource assignment specific to the mobile station in a multicast control message, wherein the multicast control message is directed to the first multicast group defined by the first multicast group ID, wherein the multicast control message identifies a plurality of mobile stations of the first multicast group that are each assigned respective resources; and
transmitting a second uplink resource assignment in a second multicast control message, wherein a second multicast control message is directed to a second multicast group is defined by a second multicast group ID, wherein the mobile station is not a member of the second multicast group, wherein the second multicast group ID is used to prevent the mobile station from decoding the second multicast control message.

### Claim 2 (depends on 1)

The method of claim 1, wherein the at least one system information message is broadcast on at least every N radio frames, wherein N is an integer.

### Claim 3 (depends on 1)

The method of claim 1, wherein the at least one system information message further comprises a sector ID, geographic information, and neighbor information.

### Claim 4 (depends on 1)

The method of claim 1, wherein the resource partitioning configuration further comprises a resource pool for uplink messages and traffic to the base station.

### Claim 5 (depends on 4)

The method of claim 4, wherein the resource pool for uplink messages and traffic to the base station is the remainder of uplink resources not included in the one or more feedback partitions and the first signaling partition in the first time interval.

### Claim 6 (depends on 4)

The method of claim 4, wherein the uplink resource assignment and the second uplink resource assignment are reassignable each time interval.

### Claim 7 (depends on 6)

The method of claim 6, wherein uplink resource assignments are on an on demand basis and for one or more time intervals.

### Claim 8 (depends on 1)

The method of claim 1, further comprising:
establishing a downlink resource pool in the first time interval, the downlink resource pool being divided into a plurality of physical layer downlink allocation units usable for wirelessly transmitting downlink control information and downlink traffic data, wherein the physical layer of the downlink is based on a broadband OFDM technology; and
assigning downlink allocation units for the wireless transmission of the downlink control information and downlink traffic data, wherein the downlink allocation units are arranged into time intervals, wherein the assigned downlink allocation units are reassignable each time interval.

### Claim 9 (depends on 8)

The method of claim 8, further comprising:
reserving a predetermined quantity of downlink allocation units for a portion of the downlink control information defining how an interval is decoded.

### Claim 10

A method of receiving a configuration of wireless transmission resources, the method comprising:
at a mobile station:
receiving at least one system information message from a base station comprising resource partitioning of an uplink resource pool in a first time interval, wherein the uplink resource pool is divided into a plurality of physical layer allocation units usable for wirelessly transmitting control and traffic data from mobile stations, wherein the physical layer of the uplink is based on a broadband orthogonal frequency domain multiplexing (OFDM) technology, wherein the resource partitioning of the allocation units of the uplink resource pool, wherein the resource partitioning configuration comprises at least partitions of:
one or more feedback partitions configurable to receive at least channel quality feedback, feedback related to multiple input multiple output (MIMO) operation, and hybrid automatic repeat request (HARD) feedback at a base station from one or more mobile stations; and
a first signaling partition configurable to receive signalling at the base station from one or more mobile station, where the signalling is used for at least performing a uplink timing adjustment for mobile station transmissions;
joining a first multicast group based on a common parameter, wherein the first multicast group is defined by a first multicast group ID, wherein the first multicast group ID is defined for temporarily grouping mobile stations sharing the common parameter and a particular packet type, service type, or mobile station state;
receiving an uplink resource assignment specific to the mobile station in a multicast control message, wherein the multicast control message is directed to the first multicast group defined by the first multicast group ID, wherein the multicast control message identifies a plurality of mobile stations of the first multicast group that are each assigned respective resources; and
not decoding a second uplink resource assignment in a second multicast control message, wherein a second multicast control message is directed to a second multicast group defined by a second multicast group ID, wherein the second multicast group ID prevents the mobile station from decoding the second multicast control message.

### Claim 11 (depends on 10)

The method of claim 10, wherein the at least one system information message is broadcast on at least every N radio frames, wherein N is an integer.

### Claim 12 (depends on 10)

The method of claim 10, wherein the at least one system information message further comprises a sector ID, geographic information, and neighbor information.

### Claim 13 (depends on 10)

The method of claim 10, wherein the resource partitioning configuration further comprises a resource pool for uplink messages and traffic to the base station.

### Claim 14 (depends on 13)

The method of claim 13, wherein the resource pool for uplink messages and traffic to the base station is the remainder of uplink resources not included in the one or more feedback partitions and the first signaling partition in the first time interval.

### Claim 15 (depends on 13)

The method of claim 13, wherein the uplink resource assignment and the second uplink resource assignment are reassignable each time interval.

### Claim 16 (depends on 15)

The method of claim 15, wherein uplink resource assignments are on an on demand basis and for one or more time intervals.

### Claim 17 (depends on 10)

The method of claim 10, further comprising:
receiving a downlink assignment, wherein a downlink resource pool is established, wherein the downlink resource pool is divided into a plurality of physical layer downlink allocation units usable for wirelessly transmitting downlink control information or downlink traffic data, wherein the physical layer of the downlink is based on a broadband OFDM technology, wherein the downlink assignment comprises downlink allocation units for the wireless transmission of the downlink control information or downlink traffic data, wherein the downlink allocation units are arranged into time intervals, wherein the assigned downlink allocation units are reassignable each time interval.

### Claim 18 (depends on 17)

The method of claim 17, further comprising:
receiving a portion of the downlink control information defining how an interval is decoded on reserved predetermined quantity of downlink allocation units.