Scheduling method and apparatus

A scheduling method for a scheduling apparatus, the scheduling method comprising:

• (a) classifying user terminals located within a serving cell of a base station into a plurality of scheduling groups by using products of large-scale fading information of the user terminals and available energy information of the user terminals;
• (b) setting a transmission power of the user terminals for each of the classified scheduling groups so that the user terminals in a same scheduling group use same transmission power;
• (c) setting a scheduling period for each of the scheduling groups based on a resource element usage proportion for each of the scheduling groups, the resource element usage portion being determined based on a data rate of each of the scheduling groups;
• and
• (d) allocating a number of resource elements used for each of the scheduling groups according to the respectively determined scheduling period;
• wherein the user terminals having the resource elements allocated thereto directly decide whether or not to use the allocated resource elements,
• wherein the products of the large-scale fading information and the available energy information of the user terminals are compared, and cases having a difference smaller than or equal to a predetermined threshold value are classified into a same scheduling group,
• wherein a difference in the products of the large-scale fading information and the available energy information between a user terminal having a largest product and a user terminal having a smallest product is smaller than or equal to a predetermined threshold value.

A system for a user terminal of communicating with a base station according to a scheduling by the base station, the system comprising:

• a processor;
• a memory connected to the processor;
• and
• a communication unit connected to the processor,
• wherein the memory stores program instructions executable by the processor for performing procedures of:
• transmitting a physical uplink shared channel (PUSCH) signal to the base station by way of the communication unit,
• determining whether or not to use an allocated resource element upon receiving scheduling information from the base station by way of the communication unit, the scheduling information including information on a scheduling group to which the user terminal belongs and the resource element and transmission power allocated to the scheduling group, and
• transmitting a reference signal and a data signal to the base station with the allocated transmission power by using the allocated resource element together with other user terminals belonging to the scheduling group according to the received scheduling information, if as a result of the deciding it is decided that the allocated resource element is to be used,
• wherein the scheduling group is classified using products of large-scale fading information of user terminals served by the base station and available energy information of the user terminals served by the base station, and wherein the transmission power is set for each of the classified scheduling groups so that user terminals in a same scheduling group use same transmission power,
• wherein the products of the large-scale fading information and the available energy information of the user terminals are compared, and cases having a difference smaller than or equal to a predetermined threshold value are classified into a same scheduling group,
• wherein a difference in the products of the large-scale fading information and the available energy information between a user terminal having a largest product and a user terminal having a smallest product is smaller than or equal to a predetermined threshold value.

A method for a user terminal of communicating with a base station according to a scheduling by the base station, the method comprising:

• (a) transmitting a physical uplink shared channel (PUSCH) signal to the base station;
• (b) receiving scheduling information from the base station, the scheduling information including information on a scheduling group to which the user terminal belongs and a resource element and transmission power allocated to the scheduling group;
• and
• (c) transmitting a reference signal and a data signal to the base station with the allocated transmission power by using the allocated resource element together with other user terminals belonging to the scheduling group according to the received scheduling information,
• wherein the scheduling information is generated based on large-scale fading information acquired by the base station by using the physical uplink shared channel signal, wherein the scheduling group is classified using products of large-scale fading information of user terminals served by the base station and available energy information of the user terminals served by the base station,
• wherein the products of the large-scale fading information and the available energy information of the user terminals are compared, and cases having a difference smaller than or equal to a predetermined threshold value are classified into a same scheduling group,
• wherein a difference in the products of the large-scale fading information and the available energy information between a user terminal having a largest product and a user terminal having a smallest product is smaller than or equal to a predetermined threshold value, wherein said step (c) includes deciding whether or not to use the allocated resource element, and
• wherein, the transmission power is set for each of the classified scheduling groups so that user terminals in a same scheduling group use same transmission power.