Communications method and apparatus

1 . A communication method, comprising:

obtaining, by a first communications device, a first carrier to transmit a first message and a second message;

obtaining, by the first communications device, a first transmission resource and a second transmission resource of the first carrier to send the first message and the second message respectively, and the first transmission resource and the second transmission resource are different transmission resources;

occupying, by the first communications device, the first transmission resource and the second transmission resource in a time division multiplexing (TDM) mode, wherein the first transmission resource and the second transmission resource have a same radio frame number in time domain, or a preset offset value exists between the first transmission resource and the second transmission resource in time domain, where the preset offset value is preset or indicated by signaling sent by a network device;

sending, by the first communications device, the first message on the first transmission resource at a first transmit power using a first wireless access technology; and

sending, by the first communications device, the second message on the second transmission resource at a second transmit power using a second wireless access technology, wherein the first wireless access technology and the second wireless access technology are different inter-device direct communications technologies, and

wherein the first transmit power is based on a subcarrier spacing of the first transmission resource, and the second transmit power is based on a subcarrier spacing of the second transmission resource such that when the subcarrier spacing of the first transmission resource is larger than the subcarrier spacing of the second transmission resource, the first transmit power is higher than the second transmit power, and wherein

the first transmission resource and the second transmission resource both belong to a first resource pool and are orthogonal to each other; or

the first transmission resource belongs to a second resource pool, the second transmission resource belongs to a third resource pool, and the second resource pool and the third resource pool are orthogonal to each other.

2 . The communication method according to claim 1 , further comprising:

determining, by the first communications device, the first transmit power and the second transmit power, wherein a sum of the first transmit power and the second transmit power is less than or equal to a configured power that is preconfigured or indicated by first signaling received from a network device.

3 . The communication method according to claim 2 , further comprising:

sending, by the first communications device, first indication information used to indicate the first transmit power; and

sending, by the first communications device, second indication information used to indicate the second transmit power.

4 . The communication method according to claim 1 , wherein obtaining a first transmission resource and a second transmission resource of the first carrier comprises:

obtaining, by the first communications device, a first resource set and a second resource set of the first carrier, wherein a time-domain resource unit of the first resource set is determined based on the subcarrier spacing of the first transmission resource, and a time-domain resource unit of the second resource set is determined based on the subcarrier spacing of the second transmission resource;

obtaining, by the first communications device, the first transmission resource from the first resource set based on first configuration information indicating at least one time-domain resource unit in the first resource set; and

obtaining the second transmission resource from the second resource set based on second configuration information indicating at least one time-domain resource unit in the second resource set, wherein the first configuration information is preconfigured or indicated by second signaling sent by a network device, and the second configuration information is preconfigured or indicated by third signaling sent by the network device.

5 . The communication method according to claim 1 , wherein obtaining a first transmission resource of the first carrier comprises:

obtaining, by the first communications device, a third resource set and a fourth resource set of the first carrier, wherein the fourth resource set is a subset of the third resource set, a time-domain resource unit of the third resource set is determined based on the subcarrier spacing of the second transmission resource, and a time-domain resource unit of the fourth resource set is determined based on the subcarrier spacing of the first transmission resource; and

obtaining, by the first communications device, the first transmission resource from the fourth resource set based on third configuration information, indicating at least one time-domain resource unit in the fourth resource set, wherein the third configuration information is preconfigured or is indicated by fourth signaling sent by a network device.

6 . The communication method according to claim 1 , wherein obtaining a first carrier comprises:

determining, by the first communications device, the first carrier; or

receiving, by the first communications device, carrier indication information from a network device, indicating the first carrier; and obtaining the first carrier according to the carrier indication information.

7 . A communication method, comprising:

obtaining, by a second communications device, a first carrier to transmit a first message and a second message;

obtaining, by the second communications device, a first transmission resource and a second transmission resource of the first carrier to receive the first message and the second message respectively, wherein the first transmission resource is different from the second transmission resource;

receiving, by the second communications device, the first message on the first transmission resource at a first transmit power using a first wireless access technology; and

receiving, by the second communications device, the second message on the second transmission resource at a second transmit power using a second wireless access technology, wherein the first wireless access technology and the second wireless access technology are different inter-device direct communications technologies, and wherein the first transmit power is based on a subcarrier spacing of the first transmission resource, and the second transmit power is based on a subcarrier spacing of the second transmission resource such that when the subcarrier spacing of the first transmission resource is larger than the subcarrier spacing of the second transmission resource, the first transmit power is higher than the second transmit power, wherein

the first transmission resource and the second transmission resource both belong to a first resource pool and are orthogonal to each other; or

the first transmission resource belongs to a second resource pool, the second transmission resource belongs to a third resource pool, and the second resource pool and the third resource pool are orthogonal to each other, wherein the first transmission resource and the second transmission resource are occupied in a time division multiplexing (TDM) mode, and wherein the first transmission resource and the second transmission resource have a same radio frame number in time domain, or a preset offset value exists between the first transmission resource and the second transmission resource in time domain, where the preset offset value is preset or indicated by signaling sent by a network device.

8 . The communication method according to claim 7 , further comprising:

obtaining, by the second communications device, first indication information indicating the first transmit power of the first message; and

obtaining, by the second communications device, second indication information indicating the second transmit power of the second message, wherein a sum of the transmit power of the first message and the transmit power of the second message is less than or equal to a configured power, which is preconfigured or is indicated by signaling sent by a network device.

9 . The communication method according to claim 7 , wherein obtaining a first transmission resource and a second transmission resource of the first carrier comprises:

obtaining, by the second communications device, a first resource set and a second resource set of the first carrier, wherein a time-domain resource unit of the first resource set is determined based on the subcarrier spacing of the first transmission resource, and a time-domain resource unit of the second resource set is determined based on the subcarrier spacing of the second transmission resource;

obtaining, by the second communications device, the first transmission resource from the first resource set based on first configuration information indicating at least one time-domain resource unit in the first resource set, wherein the first configuration information is preconfigured, indicated by second signaling sent by a network device, or sent by a first communications device; and

obtaining the second transmission resource from the second resource set based on second configuration information indicating at least one time-domain resource unit in the second resource set, wherein the second configuration information is preconfigured, indicated by third signaling sent by the network device, or sent by a third communications device.

10 . The communication method according to claim 7 , wherein obtaining a first transmission resource of the first carrier comprises:

obtaining, by the second communications device, a third resource set and a fourth resource set of the first carrier, wherein the fourth resource set is a subset of the third resource set, a time-domain resource unit of the third resource set is determined based on the subcarrier spacing of the second transmission resource, and a time-domain resource unit of the fourth resource set is determined based on the subcarrier spacing of the first transmission resource; and

obtaining, by the second communications device, the first transmission resource from the fourth resource set based on third configuration information indicating at least one time-domain resource unit in the fourth resource set, wherein the third configuration information is preconfigured, indicated by fourth signaling sent by a network device, or sent by a first communications device.

11 . The communication method according to claim 7 , wherein obtaining a first carrier comprises:

determining, by the second communications device, the first carrier; or

receiving, by the second communications device, carrier indication information from a network device, indicating the first carrier; and obtaining the first carrier according to the carrier indication information.

12 . A communications device operating as a first communications device, comprising:

an obtaining unit configured to:

obtain a first carrier to transmit a first message and a second message, and

obtain a first transmission resource and a second transmission resource of the first carrier to send the first message and the second message respectively, wherein the first transmission resource and the second transmission resource are different transmission resources; and

a sending unit configured to:

occupy the first transmission resource and the second transmission resource in a time division multiplexing (TDM) mode, wherein the first transmission resource and the second transmission resource have a same radio frame number in time domain, or a preset offset value exists between the first transmission resource and the second transmission resource in time domain, where the preset offset value is preset or indicated by signaling sent by a network device;

send, using a first wireless access technology, the first message on the first transmission resource at a first transmit power, and

send, using a second wireless access technology, the second message on the second transmission resource at a second transmit power, wherein the first wireless access technology and the second wireless access technology are different inter-device direct communications technologies, and

wherein the first transmit power is based on a subcarrier spacing of the first transmission resource, and the second transmit power is based on a subcarrier spacing of the second transmission resource such that when the subcarrier spacing of the first transmission resource is larger than the subcarrier spacing of the second transmission resource, the first transmit power is higher than the second transmit power, and wherein

the first transmission resource and the second transmission resource both belong to a first resource pool and are orthogonal to each other; or

the first transmission resource belongs to a second resource pool, the second transmission resource belongs to a third resource pool, and the second resource pool and the third resource pool are orthogonal to each other.

13 . The communications device according to claim 12 , further comprising a determining unit configured to: determine the first transmit power and the second transmit power, wherein a sum of the first transmit power and the second transmit power is less than or equal to a configured power, which is preconfigured or is indicated by first signaling sent by a network device,

wherein the sending unit is configured to: send the first message on the first transmission resource at the first transmit power using the first wireless access technology, and send the second message on the second transmission resource at the second transmit power using the second wireless access technology.

14 . The communications device according to claim 13 , wherein the sending unit is further configured to send first indication information and second indication information to indicate the first transmit power and the second transmit power respectively.

15 . The communications device according to claim 12 , wherein the obtaining unit is further configured to:

obtain a first resource set and a second resource set of the first carrier, wherein a time-domain resource unit of the first resource set is determined based on the subcarrier spacing of the first transmission resource, and a time-domain resource unit of the second resource set is determined based on the subcarrier spacing of the second transmission resource;

obtain the first transmission resource from the first resource set based on first configuration information indicating at least one time-domain resource unit in the first resource set, wherein the first configuration information is preconfigured or is indicated by second signaling sent by a network device; and

obtain the second transmission resource from the second resource set based on second configuration information indicating at least one time-domain resource unit in the second resource set, wherein the second configuration information is preconfigured or is indicated by third signaling sent by the network device.

16 . The communications device according to claim 12 , wherein the obtaining unit is further configured to:

obtain a third resource set and a fourth resource set of the first carrier, wherein the fourth resource set is a subset of the third resource set, a time-domain resource unit of the third resource set is determined based on the subcarrier spacing of the second transmission resource, and a time-domain resource unit of the fourth resource set is determined based on the subcarrier spacing of the first transmission resource; and

obtain the first transmission resource from the fourth resource set based on third configuration information, wherein the third configuration information is used to indicate at least one time-domain resource unit in the fourth resource set, and the third configuration information is preconfigured or is indicated by fourth signaling sent by a network device.