Communication control method, user equipment, network server, and system

1. A communication control method comprising:

receiving, by a first user equipment, a first message sent by a second user equipment;

acquiring a receive power of the first message;

acquiring power parameter information of the second user equipment, wherein the power parameter information of the second user equipment is at least one of a transmit power range or a power class of the second user equipment;

obtaining a path loss value by performing a calculation according a maximum transmit power value of the second user equipment and the receive power of the first message, wherein the maximum transmit power value is based on the power parameter information; and

determining, according to the path loss value, whether direct communication is allowed between the first user equipment and the second user equipment.

2. The method according to claim 1 , wherein the first message comprises the power parameter information of the second user equipment, and wherein acquiring the power parameter information of the second user equipment comprises acquiring the power parameter information of the second user equipment included in the first message.

3. The method according to claim 1 , wherein acquiring the power parameter information of the second user equipment comprises:

receiving a second message comprising the power parameter information of the second user equipment; and

acquiring the power parameter information of the second user equipment from the second message.

4. The method according to claim 1 , wherein determining, according to the path loss value, whether direct communication is allowed between the first user equipment and the second user equipment comprises:

allowing direct communication between the first user equipment and the second user equipment when the path loss value is less than a first threshold; and

prohibiting direct communication between the first user equipment and the second user equipment when the path loss value is greater than the first threshold.

5. The method according to claim 1 , wherein the power parameter information of the second user equipment further comprises a transmit power value of the second user equipment and wherein obtaining the path loss value according to the power parameter information of the second user equipment and the receive power of the first message comprises performing calculation according to the transmit power value of the second user equipment and the receive power value of the first message to obtain the path loss value.

6. The method according to claim 1 , wherein the first threshold is pre-stored in the first user equipment.

7. The method according to claim 1 , wherein before determining, according to the path loss value, whether direct communication is allowed between the first user equipment and the second user equipment, the method further comprises receiving a first threshold sent by a network server, and wherein the network server comprises at least one of an evolved NodeB (eNodeB), a base transceiver station (BTS), a serving gateway (SGW), a packet gateway (PGW), a radio network controller (RNC), or a core network element.

8. The method according to claim 1 , wherein before determining, according to the path loss value, whether direct communication is allowed between the first user equipment and the second user equipment, the method further comprises receiving a first threshold sent by a third user equipment, and wherein the third user equipment comprises at least one of a cluster head or a Wireless Fidelity (Wi-Fi) hotspot device.

9. The method according to claim 1 , wherein the first message comprises a discovery message, a paging message, a paging response message, a service message, and a test message.

10. The method according to claim 1 , wherein the power parameter information is indicated by at least one of a time resource, a frequency resource, or a code word resource for transmitting the first message.

11. A communication control method, comprising:

sending, by a second user equipment, a first message to a first user equipment,

wherein the first message comprises power parameter information of the second user equipment,

wherein the power parameter information of the second user equipment is at least one of a transmit power range or a power class of the second user equipment,

wherein the power parameter information is used to obtain a path loss by performing a calculation according a maximum transmit power value of the second user equipment and the receive power of the first message,

wherein the maximum transmit power value is based on the power parameter information, and

wherein the power parameter information is used to determine, according to the path loss value, whether direct communication is allowed between the first user equipment and the second user equipment.

12. The method according to claim 11 , wherein the first message comprises at least one of a discovery message, a paging message, a paging response message, a service message, or a test message.

13. A user equipment, wherein the user equipment performs communication with a second user equipment, the user equipment comprising:

a receiver configured to receive a first message sent by the second user equipment; and

a processor coupled to the receiver and configured to:

acquire a receive power of the first message;

acquire power parameter information of the second user equipment, wherein the power parameter information of the second user equipment is at least one of a transmit power range or a power class of the second user equipment;

obtain a path loss value by performing a calculation according a maximum transmit power value of the second user equipment and the receive power of the first message, wherein the maximum transmit power value is based on the power parameter information; and

determine, according to the path loss value, whether direct communication is allowed between the first user equipment and the second user equipment.

14. The user equipment according to claim 13 , wherein the first message comprises the power parameter information of the second user equipment, and wherein the processor is further configured to acquire the power parameter information of the second user equipment included in the first message.

15. The user equipment according to claim 13 , wherein the receiver is further configured to receive a second message comprising the power parameter information of the second user equipment, and wherein the processor is further configured to acquire the power parameter information of the second user equipment from the second message.

16. The user equipment according to claim 13 , wherein the processor is further configured to:

allow direct communication between the user equipment and the second user equipment when the path loss value is less than a first threshold; and

prohibit direct communication between the user equipment and the second user equipment when the path loss value is greater than the first threshold.

17. The user equipment according to claim 13 , wherein the power parameter information of the second user equipment further comprises a transmit power value of the second user equipment, and wherein the processor is further configured to perform calculation according to the transmit power value of the second user equipment and the receive power value of the first message to obtain the path loss value.

18. The user equipment according to claim 13 , wherein the power parameter information is indicated by a time resource, a frequency resource, and a code word resource for transmitting the first message.