A resource reuse apparatus, for use in a first user equipment, wherein the apparatus comprises: a monitoring module, configured to monitor idle resources so as to obtain a first idle resource set; a claiming module, configured to claim, in a first cycle, to use a first resource, wherein the first resource is a resource in the first idle resource set that is obtained by the monitoring module; a determining module, configured to determine the resources that are claimed, in the first cycle, to be used by another user equipment except the first user equipment, so as to obtain a first claimed resource set; a judging module, configured to determine, whether the first resource exists in the first claimed resource set; and a sending module, configured to: when the first resource does not exist in the first claimed resource set, use, in a second cycle, the first resource to send data; wherein the claiming module is further configured to: when the first resource exists in the first claimed resource set, claim, in the second cycle, to use a second resource, wherein the second resource is a resource, in the first idle resource set, that is different from the first resource, and the second cycle is a cycle following the first cycle; or reclaim a resource after at least one cycle following the first cycle, wherein the reclaiming a resource includes: selecting a third resource from the first idle resource set, and claiming to use the third resource; or re-monitoring idle resources so as to obtain a second idle resource set; and selecting a third resource from the second idle resource set, and claiming to use the third resource. a monitoring module, configured to monitor idle resources so as to obtain a first idle resource set; a claiming module, configured to claim, in a first cycle, to use a first resource, wherein the first resource is a resource in the first idle resource set that is obtained by the monitoring module; a determining module, configured to determine the resources that are claimed, in the first cycle, to be used by another user equipment except the first user equipment, so as to obtain a first claimed resource set; a judging module, configured to determine, whether the first resource exists in the first claimed resource set; and a sending module, configured to: when the first resource does not exist in the first claimed resource set, use, in a second cycle, the first resource to send data; wherein the claiming module is further configured to: when the first resource exists in the first claimed resource set, claim, in the second cycle, to use a second resource, wherein the second resource is a resource, in the first idle resource set, that is different from the first resource, and the second cycle is a cycle following the first cycle; or reclaim a resource after at least one cycle following the first cycle, wherein the reclaiming a resource includes: selecting a third resource from the first idle resource set, and claiming to use the third resource; or re-monitoring idle resources so as to obtain a second idle resource set; and selecting a third resource from the second idle resource set, and claiming to use the third resource. selecting a third resource from the first idle resource set, and claiming to use the third resource; or re-monitoring idle resources so as to obtain a second idle resource set; and selecting a third resource from the second idle resource set, and claiming to use the third resource.