Power estimation method and apparatus

• US 10,285,140 B2
• Filed: 04/28/2017
• Issued: 05/07/2019
• Est. Priority Date: 10/31/2014
• Status: Active Grant

• Current Assignee: Fraunhofer Gesellschaft Zur Foerderung Der Angewandten Forsching E.V., Huawei Technologies Co., Ltd. (Huawei Investment & Holding Co., Ltd.)
• Original Assignee: Fraunhofer Gesellschaft Zur Foerderung Der Angewandten Forsching E.V., Huawei Technologies Co., Ltd. (Huawei Investment & Holding Co., Ltd.)
• Inventors: Zhuang, Hongcheng, Beletchi, Andrian, Zhang, Jietao
• Primary Examiner(s): Butt, Walli Z
• Application Number:
  US15/582,373
• Publication Number:
  US 20170238267A1
• Time in Patent Office: 739 Days
• CPC Class Codes: H04W 52/00 Power management, e.g. TPC [Transmission Power Control], power saving or power classes gain control in transmitters or power amplifiers H03G3/3042
• CPC Class Codes: H04W 52/243 taking into account interferences
• 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 52/343 taking into account loading or congestion level
• CPC Class Codes: H04W 52/362 Aspects of the step size
• CPC Class Codes: H04W 52/367 Power values between minimum and maximum limits, e.g. dynamic range

Abstract

Embodiments of the present invention disclose a power estimation method and apparatus. On a premise of controlling interference caused by a second node to a first node to be within a range, a transmit power of the second node can be increased so as to improve communication quality of the second node. A specific solution is: obtaining an estimated load value of each first node in N first nodes according to a transmit power and user service requirements of each first node that are obtained and according to a transmit power set for each second node in M second nodes, and further, respectively using the transmit power set for each second node as an allowed transmit power of each second node according to the estimated load value of each first node in the N first nodes.

Claims

1. A power estimation method, comprising:

obtaining a transmit power of each first node in N first nodes;

setting a transmit power of each second node in M second nodes, wherein each second node is a network node that causes interference to at least one first node in the N first nodes;

obtaining channel gains from each first node and each second node to each user;

obtaining user service requirements of each first node in the N first nodes, wherein user service requirements of an n^th first node in the N first nodes are service data rates between the n^th first node and users served by the n^th first node, and n is a positive integer less than or equal to N;

obtaining an estimated load value of each first node in the N first nodes according to the transmit power of each first node in the N first nodes, the user service requirements of each first node in the N first nodes, and the transmit power of each second node in the M second nodes, wherein the estimated load value of the n^th first node in the N first nodes is a value obtained by estimating a physical resource consumption level of the n^th first node in the N first nodes; and

when the estimated load value of each first node in the N first nodes is less than a first threshold and greater than a second threshold, or the estimated load value of each first node in the N first nodes is less than the first threshold and the transmit power of each second node in the M second nodes is greater than a third threshold, individually using the transmit power of each second node in the M second nodes as an allowed transmit power of each second node in the M second nodes,

wherein the obtaining estimated load value of each first node in the N first nodes according to the transmit power of each first node in the N first nodes, the user service requirements of each first node in the N first nodes, and the transmit power of each second node in the M second nodes comprises;

substituting the transmit power of each first node in the N first nodes, the user service requirements of each first node in the N first nodes, and the transmit power of each second node in the M second nodes into a first formula, so as to obtain, by means of calculation, the estimated load value of the n^th first node in the N first nodes,

wherein the first formula is;

2. The method according to claim 1, wherein the method further comprises:

when the estimated load value of the n^th first node in the N first nodes is greater than or equal to the first threshold, individually subtracting a preset step-size from the transmit power of each second node in the M second nodes, so as to obtain a new transmit power of each second node in the M second nodes.

3. The method according to claim 1, wherein the method further comprises:

when the estimated load value of the n^th first node in the N first nodes is less than or equal to the second threshold, or a transmit power of an m^th second node in the M second nodes is less than or equal to the third threshold, individually adding a preset step-size to the transmit power of each second node in the M second nodes, so as to obtain a new transmit power of each second node in the M second nodes.

4. The method according to claim 1, wherein:

the first threshold is a sum of a maximum value in first load values of the N first nodes and a first preset margin, or a product of a maximum value in the first load values of the N first nodes and a first preset coefficient; and

a first load value of the n^th first node in the N first nodes is a maximum value in actual load values of the n^th first node in the N first nodes, wherein the actual load value of the n^th first node is used to indicate an actual physical resource consumption level of the n^th first node;

or

a first load value of the n^th first node in the N first nodes is an arithmetic average value of actual load values of the n^th first node in the N first nodes;

or

a first load value of the n^th first node in the N first nodes is a sum of ρ

_n×

ω

₁ and ρ

_f×

ω

₂, wherein ρ

_n is a maximum value in actual load values of the n^th first node in the N first nodes, and ρ

_f is a predicted load value of the n^th first node in the N first nodes, wherein the predicted load value of the n^th first node in the N first nodes is a value obtained by predicting an actual load value of the n^th first node, ω

₁ is a first weighting coefficient, and ω

₂ is a second weighting coefficient.

5. The method according to claim 1, wherein the method further comprises:

sending allowed transmit power information of the m^th second node in the M second nodes to the m^th second node, wherein the allowed transmit power information is used to indicate the allowed transmit power of the m^th second node.

6. A network device, wherein the network device comprises:

a receiver, a processor, a memory, and a bus, and the receiver, the processor, and the memory are connected to each other by using the bus,

wherein the receiver is configured to obtain a transmit power of each first node in N first nodes;

wherein the processor is configured to set a transmit power of each second node in M second nodes, wherein keach second node is a network node that causes interference to at least one first node in the N first nodes;

wherein the processor is further configured to obtain user service requirements of each first node in the N first nodes, wherein user service requirements of an n^th first node in the N first nodes are service data rates between the n^th first node and users served by the n^th first node, and n is a positive integer less than or equal to N;

wherein the processor is further configured to obtain channel gains from each first node and each second node to each user;

wherein the processor is further configured to obtain an estimated load value of each first node in the N first nodes according to;

the transmit power of each first node in the N first nodes, the user service requirements of each first node in the N first nodes, and the transmit power of each second node in the M second nodes,

wherein the estimated load value is a value obtained by estimating a physical resource consumption level of the n^th first node in the N first nodes by means of calculation according to a first formula, the estimated load value of the n^th first node in the N first nodes,

wherein the first formula is;

7. The network device according to claim 6, wherein:

the processor is further configured to;

when the estimated load value of the n^th first node in the N first nodes is greater than or equal to the first threshold, individually subtract a preset step-size from the transmit power of each second node in the M second nodes, so as to obtain a new transmit power of each second node in the M second nodes.

8. The network device according to claim 6, wherein:

the processor is further configured to;

when the estimated load value of the n^th first node in the N first nodes is less than or equal to the second threshold, or when a transmit power of an m^th second node in the M second nodes is less than or equal to the third threshold, individually add a preset step-size to the transmit power of each second node in the M second nodes, so as to obtain a new transmit power of each second node in the M second nodes.

9. The network device according to claim 6, wherein:

the processor is further configured to use a sum of a maximum value in first load values of the N first nodes and a first preset margin, or a product of a maximum value in the first load values of the N first nodes and a first preset coefficient as the first threshold, wherein

a first load value of the n^th first node in the N first nodes is a maximum value in actual load values of the n^th first node in the N first nodes, wherein the actual load value of the n^th first node is used to indicate an actual physical resource consumption level of the n^th first node;

or

a first load value of the n^th first node in the N first nodes is an arithmetic average value of actual load values of the n^th first node in the N first nodes;

or

a first load value of the n^th first node in the N first nodes is a sum of ρ

_n×

ω

₁ and ρ

_f×

ω

₂, wherein ρ

_n is a maximum value in actual load values of the n^th first node in the N first nodes, and ρ

_f is a predicted load value of the n^th first node in the N first nodes, wherein the predicted load value of the n^th first node in the N first nodes is a value obtained by predicting an actual load value of the n^th first node, ω

₁ is a first weighting coefficient, and ω

₂ is a second weighting coefficient.

10. The network device according to claim 6, wherein:

the network device further comprises a transmitter, configured to send allowed transmit power information of the m^th second node in the M second nodes to the m^th second node, wherein the allowed transmit power information is used to indicate the allowed transmit power of the m^th second node.