Channel power adjustment based on positional information of area restricted self-organizing subnets

• US 9,544,858 B2
• Filed: 11/12/2014
• Issued: 01/10/2017
• 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
• Primary Examiner(s): Patel, Parth
• Assistant Examiner(s): CHANG, KAI J
• Application Number:
  US14/538,943
• Publication Number:
  US 20150139124A1
• Time in Patent Office: 790 Days
• US Class Current: 1/1
• 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:

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

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

2. The method according to claim 1, wherein:

the first self-organizing subnet working in the first channel and 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 power of the first channel or a power larger than a predetermined power.

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

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 predetermined rule is based on the positional priorities and the data type priorities of the plural self-organizing subnets.

4. The method according to claim 3, wherein:

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

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

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

wherein,

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

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

adjusting a power of a second device in a second self-organizing subnet which is different from the first self-organizing subnet and works 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, further comprising:

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 subnet on a third self-organizing subnet, which is different from the first and second self-organizing subnets and works 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 without 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:

before the adjusting of the power of the first device, 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 adjusting of the power of the first device 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, the system comprising:

a memory that stores a program; and

a processor that executes the program to perform a process including

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

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