Apparatus and method for transmitting and receiving information and power in wireless communication system
View Patent ↗The disclosure relates to a pre-5th-generation (5G) or 5G communication system to be provided for supporting higher data rates beyond 4th-generation (4G) communication system such as long term evolution (LTE). An operation of a base station to location-based user classification and power allocation in a wireless communication system is provided. The method performed by a base station includes forming a pre-defined terminal group beam, classifying terminals into a plurality of terminal group by using location information of the plurality of terminals, received from the base station, allocating transmit (Tx) power to a terminal in a terminal group based on the location information of the plurality of terminals existing in each terminal group, and adjusting Tx power distributed to each terminal group so that an overall system communication capacity is greatest.
1. A method performed by a base station in a wireless communication system, the method comprising:
receiving location information of terminals;
determining pre-defined terminal group beams to classify the terminals;
classifying the terminals into a terminal group based on location information of the terminals;
allocating transmit (Tx) power to an objective terminal and the other terminals in the terminal group based on the location information of the terminals;
adjusting the Tx power allocated to the terminal group; and
transmitting the allocated Tx power to the terminals,
wherein the objective terminal has a top priority in Tx power allocation.
2. The method of claim 1 , wherein the classifying of the terminals into the terminal group comprises comparing the location information of the terminals and an angle of a beam of the pre-defined terminal group beams.
3. The method of claim 1 , wherein the allocating of the Tx power to the terminals in the terminal group comprises:
selecting the objective terminal;
distributing Tx power to the other terminals in the terminal group based on a channel capacity to be satisfied when the Tx power is distributed using an orthogonal multiple access scheme; and
distributing, to the objective terminal, the remaining Tx power except for the Tx power distributed to the other terminals, from the Tx power allocated to the terminal group.
4. The method of claim 3 , wherein the distributing of the Tx power to the other terminals in the terminal group comprises uniformly distributing the Tx power to a terminal farthest in distance from the base station based on the channel capacity to be satisfied when the Tx power is distributed using the orthogonal multiple access scheme.
5. The method of claim 1 , wherein the adjusting of the Tx power allocated to the terminal group comprises:
calculating a communication capacity based on a case where the Tx power is uniformly distributed to terminal groups; and
allocating the Tx power to each terminal group based on a water-filling scheme for amplifying up to a required power level based on the calculated communication capacity for each terminal group.
6. The method of claim 1 , further comprising:
allocating Tx power to the terminals in the terminal group based on location information of the terminals on the basis of the adjusted Tx power; and
adjusting the Tx power allocated to the terminal group.
7. The method of claim 1 , further comprising determining whether to further allocate the Tx power and adjust the Tx power.
8. A base station in a wireless communication system, the base station comprises:
at least one transceiver; and
at least one processor operably coupled to the at least one transceiver,
wherein the at least one processor is configured to:
receive location information of terminals,
determine pre-defined terminal group beams to classify the terminals,
classify the terminals into a terminal group based on the location information of the terminals,
allocate transmit (Tx) power to an objective terminal and the other terminals in the terminal group based on the location information of the terminals,
adjust the Tx power allocated to the terminal group, and
transmit the allocated Tx power to the terminals,
wherein the objective terminal has a top priority in Tx power allocation.
9. The base station of claim 8 , wherein the at least one processor is further configured to compare the location information of the terminals and an angle of a beam of the pre-defined terminal group beams.
10. The base station of claim 8 , wherein the at least one processor is further configured to:
select the objective terminal in the terminal group,
distribute Tx power to the other terminals in the terminal group on the basis of a channel capacity to be satisfied when the Tx power is distributed using an orthogonal multiple access scheme, and
distribute, to the objective terminal, the remaining Tx power except for the Tx power distributed to the other terminals, from the Tx power allocated to the terminal group.
11. The base station of claim 10 , wherein the at least one processor is further configured to, in order to distribute the Tx power to the other terminals in the terminal group, uniformly distribute the Tx power to a terminal farthest in distance from the base station on the basis of the channel capacity to be satisfied when the Tx power is distributed using the orthogonal multiple access scheme.
12. The base station of claim 8 , wherein the at least one processor is further configured to:
calculate a communication capacity based on a case where the Tx power is uniformly distributed to terminal groups, and
distribute the Tx power to each terminal group based on a water-filling scheme for amplifying up to a required power level based on the calculated communication capacity for each terminal group.
13. The base station of claim 8 , wherein the at least one processor is further configured to:
allocate Tx power to the terminals in the terminal group based on location information of the terminals on the basis of the adjusted Tx power, and
adjust the Tx power distributed to the terminal group.
14. The base station of claim 8 , wherein the at least one processor is further configured to determine whether to further comprise allocating the Tx power and adjusting the Tx power.
15. The base station of claim 8 , wherein the at least one processor is further configured to:
determine whether a change condition of Tx power allocation occurs, and
in response to a determination that the change condition has occurred, allocate Tx power for each terminal in each terminal group.
16. The base station of claim 15 , wherein the change condition occurs at a pre-set time.
17. The base station of claim 15 , wherein the change condition occurs when the objective terminal changes.
18. The base station of claim 15 , wherein the change condition occurs when a change in communication throughput in the terminal group exceeds 10%.
19. The method of claim 1 , further comprising:
determining whether a change condition of Tx power allocation occurs, and
in response to a determination that the change condition has occurred, allocating Tx power for each terminal in each terminal group.
20. The method of claim 19 , wherein the change condition occurs at a pre-set time.