# US 8,571,482 B2 · Dynamic autonomous resource allocation and channel access in cellular System Uplink

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- Number: US 8,571,482 B2
- Document ID: US8571482B2
- Status: Granted
- Kind: B2
- Application number: 12/880,099
- Filed: 2010-09-11
- Published: 2012-03-15
- Granted: 2013-10-29
- Earliest claimed: 2010-09-11
- Assignees: Nokia Corporation
- Applicants: Sami-Jukka Hakola; Samuli Turtinen; Timo Koskela; Vinh Van Phan
- Inventors: Sami-Jukka Hakola; Samuli Turtinen; Timo Koskela; Vinh Van Phan
- Web page: https://patentgrep.com/patent/US8571482B2

## CPC

- H04W 72/02: Selection of wireless resources by user or terminal
- H04W 24/08: Testing, {supervising or monitoring} using real traffic
- H04W 24/10: Scheduling measurement reports {; Arrangements for measurement reports}
- H04W 52/244: {Interferences in heterogeneous networks, e.g. among macro and femto or pico cells or other sector / system interference [OSI]}
- H04W 72/04: Wireless resource allocation
- H04W 74/00: Wireless channel access
- H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72)

## Abstract

Methods, apparatuses, and software can be provided for dynamic autonomous resource allocation and channel access in a cellular system uplink. A method can include measuring interference levels on uplink resources of a victim cell and calculating a probability of accessing channels of the uplink resources of the victim cell using the measured interference levels, including defining a suitable transmission power, and a highest value and a lowest value. The method can further include accessing a channel for which the probability of accessing has been calculated, when the probability meets a predetermined condition.

## Claims

### Claim 1

A method, comprising:
measuring, by a local device, interference levels on uplink resources of a victim cell;
calculating a probability of accessing channels of the uplink resources of the victim cell using the interference levels measured by the local device, wherein the calculating the probability comprises defining a suitable transmission power, and a highest value and a lowest value;
accessing, by the local device, a channel for which the probability of accessing has been calculated, when the probability meets a predetermined condition.

### Claim 2 (depends on 1)

The method of claim 1, wherein determining, based on the further measuring, whether the minimum power level can be ensured; and
triggering carrier reselection in response to the further measuring when a result of the determining is that the minimum power level cannot be ensured in the carrier.

### Claim 3 (depends on 1)

The method of claim 1, wherein the calculating comprises calculating the probability as follows:
pchannelAccess=max(0,p−mean(valuedata(1,t), . . . , valuedata(N,t)))/(p−L).

### Claim 4 (depends on 1)

The method of claim 1, wherein the calculating comprises calculating the probability for candidate transmission resource j as follows:
pchannelAccess=max(0,p−valuedata(j,t))/(p−L).

### Claim 5 (depends on 1)

The method of claim 1, wherein the probability of the access is computed without using a nominal power level obtained by downlink signaling.

### Claim 6 (depends on 1)

The method of claim 1, further compromising:
maintaining information about a highest interference power level and a lowest interference power level in a sliding-window measurement period.

### Claim 7 (depends on 1)

The method of claim 1, further comprising:
calculating a suitable power level for local data transmissions based on a highest measured interference power level value.

### Claim 8

A method, comprising:
forming collective high and low values from interference measurements performed by a plurality of local devices;
calculating and deciding access for the plurality of local devices; and
controlling the access of the plurality of local devices based on the calculating and deciding,
wherein a probability of the access is computed without using a nominal power level obtained by downlink signaling, and wherein the probability of the access is used in the deciding the access.

### Claim 9 (depends on 8)

The method of claim 8, wherein the forming collective high and low values is based on processing received individual high and low values from the plurality of local devices.

### Claim 10 (depends on 8)

The method of claim 8, wherein the calculating and deciding the access comprises calculating and deciding at least one of transmit power setting, resource allocation, transmission probability, or carrier reselection.

### Claim 11

An apparatus, comprising:
at least one memory including computer program code; and
at least one processor,
wherein the at least one memory and the computer program code are configured to, with the at least one processor, cause the apparatus at least to
measure interference levels on uplink resources of a victim cell,
calculate a probability of accessing channels of the uplink resources of the victim cell using the interference levels measured by the apparatus, wherein calculating the probability of accessing channels comprises defining a suitable transmission power, and a highest value and a lowest value,
access a channel for which the probability of accessing has been calculated, when the probability meets a predetermined condition.

### Claim 12 (depends on 11)

The apparatus of claim 11, wherein the at least one memory and the computer program code are further configured to, with the at least one processor, cause the apparatus at least to
determine, based on the further measuring, whether the minimum power level can be ensured, and
trigger carrier reselection in response to the further measuring when a result of the determining is that the minimum power level cannot be ensured in the carrier.

### Claim 13 (depends on 11)

The apparatus of claim 11, wherein the at least one memory and the computer program code are configured to, with the at least one processor, cause the apparatus at least to calculate the probability as follows:
pchannelAccess=max(0,p−mean(valuedata(1,t), . . . , valuedata(N,t)))/(p−L).

### Claim 14 (depends on 11)

The apparatus of claim 11, wherein the at least one memory and the computer program code are configured to, with the at least one processor, cause the apparatus at least to calculate the probability for candidate transmission resource j as follows:
pchannelAccess=max(0,p−valuedata(j,t))/(p−L).

### Claim 15 (depends on 11)

The apparatus of claim 11, wherein the at least one memory and the computer program code are configured to, with the at least one processor, cause the apparatus at least to compute the probability of the access without using a nominal power level obtained by downlink signaling.

### Claim 16 (depends on 11)

The apparatus of claim 11, wherein the at least one memory and the computer program code are configured to, with the at least one processor, cause the apparatus at least to maintain information about a highest interference power level and a lowest interference power level in a sliding-window measurement period.

### Claim 17 (depends on 11)

The apparatus of claim 11, wherein the at least one memory and the computer program code are configured to, with the at least one processor, cause the apparatus at least to calculate a suitable power level for local data transmissions based on a highest measured interference power level value.