CHANNEL POWER ADJUSTMENT BASED ON POSITIONAL INFORMATION OF AREA RESTRICTED SELF-ORGANIZING SUBNETS

• US 20150139124A1
• Filed: 11/12/2014
• Published: 05/21/2015
• Est. Priority Date: 11/15/2013
• Status: Active Grant

• Current Assignee: Ricoh Company Limited
• Original Assignee: Ricoh Company Limited
• Inventors: DA, Bin, WANG, Wei, ZHANG, Yindong, YANG, Linju
• Granted Patent: US 9,544,858 B2
• Time in Patent Office: Days
• US Class Current: 370/329
• CPC Class Codes: H04W 52/244 Interferences in heterogeneous networks, e.g. among macro and femto or pico cells or other sector / system interference [OSI]
• CPC Class Codes: H04W 52/281 taking into account user or data type priority
• CPC Class Codes: H04W 52/283 Power depending on the position of the mobile
• CPC Class Codes: H04W 72/0473 the resource being transmission power
• CPC Class Codes: H04W 84/22 with access to wired networks

Abstract

Disclosed is a channel power adjustment method and system based on positional information of plural self-organizing subnets in a restricted area. The method includes a first setting step of setting, based on the positional information of the plural self-organizing subnets, a positional priority for each of the plural self-organizing subnets; and a first adjustment step of adjusting, at least partially based on the positional priorities of the plural self-organizing subnets, a power of a first device in a first self-organizing subnet working in a first channel, satisfying a predetermined rule to a first power of the first channel.

Claims

1. A channel power adjustment method based on positional information of plural self-organizing subnets in a restricted area, comprising:

a first setting step of setting, based on the positional information of the plural self-organizing subnets, a positional priority for each of the plural self-organizing subnets; and

a first adjustment step of adjusting, at least partially based on the positional priorities, a power of a first device in a first self-organizing subnet working in a first channel, satisfying a predetermined rule to a first power of the first channel.

2. The method according to claim 1, wherein:

the first self-organizing subnet working in the first channel, satisfying the predetermined rule includes one of

a self-organizing subnet whose positional priority is higher than a predetermined positional priority; and

a self-organizing subnet whose positional priority is highest,

wherein,

the first power of the first channel is a maximum one of the first channel, or is one larger than a predetermined power.

3. The method according to claim 1, further comprising:

a second setting step of setting, based on types of data to be transmitted by the plural self-organizing subnets, a data type priority for each of the plural self-organizing subnets,

wherein,

the first adjustment step further includes

adjusting, based on the positional priorities and the data type priorities of the plural self-organizing subnets, the power of the first device working in the first self-organizing subnet, satisfying the predetermined rule to the first power of the first channel.

4. The method according to claim 3, wherein:

the first self-organizing subnet working in the first channel, satisfying the predetermined rule includes one of

a self-organizing subnet whose priority is based on a weighted result of the positional priority and the data type priority of this self-organizing subnet is higher than a predetermined priority; and

at least one self-organizing subnet whose priority is based on a weighted result of the positional priority and the data type priority of the at least one self-organizing subnet is highest,

wherein,

the first power of the first channel is a maximum one of the first channel, or is one larger than a predetermined power.

5. The method according to claim 1, further comprising:

a second adjustment step of adjusting a power of a second device in a second self-organizing subnet different from the first self-organizing subnet, working in the same first channel so that a power influence caused by the second device in the second self-organizing subnet, on the first device in the first self-organizing subnet is zero or less than a predetermined influence value.

6. The method according to claim 5, wherein:

the second adjustment step further includes

adjusting the power of the second device in the second self-organizing subnet so that a power influence caused by the second device in the second self-organizing, on a third self-organizing subnet different from the first and second self-organizing subnets, working in the same first channel does not exceed an interference power tolerance of a third device in the third self-organizing subnet.

7. The method according to claim 6, wherein:

the interference power tolerance of the third device in the third self-organizing subnet is determined not taking into account a power influence caused by the first device in the first self-organizing subnet, on the third device in the third self-organizing subnet.

8. The method according to claim 1, further comprising:

a channel assignment step before the first adjustment step, of selecting the first channel from plural channels for the plural self-organizing subnets based on the positional information of the plural self-organizing subnets so that a distance between any two self-organizing subnets working in the same first channel is greater than a predetermine distance.

9. The method according to claim 1, wherein:

the first adjustment step is carried out by a master node in each of the plural self-organizing subnets.

10. A channel power adjustment system based on positional information of plural self-organizing subnets in a restricted area, comprising:

a first setting device configured to set, based on the positional information of the plural self-organizing subnets, a positional priority for each of the plural self-organizing subnets; and

a first adjustment device configured to adjust, at least partially based on the positional priorities, a power of a first device in a first self-organizing subnet working in a first channel, satisfying a predetermined rule to a first power of the first channel.