Abstract: This application provides a reflective QoS flow characteristic-based communications method and apparatus. In the method, an access-network network element sends first information to a core-network network element, where the first information is used to indicate whether a data packet has a reflective QoS flow characteristic; and the access-network network element determines, based on the first information, whether there is a need to send a QoS flow identifier to a terminal. In this way, signaling overheads are reduced.

Abstract: The present invention relates to a new lithium ion battery separator and a manufacturing method therefor, composite fine-denier POY fibers with polypropylene PP acting as a core and alkali-soluble polyester COPET and polyethylene PE acting as a skin are produced by means of a chemical fiber composite spinning technology, wherein the COPET and PE are distributed as an islands-in-the-sea form, then the POY fibers are arranged as a fabric with a certain breadth by means of beam-warping, the fabric is subjected to stretching and hot-pressing by a hot roll such that the PE component having a low melting point is melted and joined to form a film, and then the COPET is dissolved away by means of an alkali solution such that a place where the COPET is present in the film become pores and PP fibers become the skeleton of the film, thus forming a lithium ion battery separator.

Abstract: The present invention relates to a new lithium ion battery separator and a manufacturing method therefor, composite fine-denier POY fibers with polypropylene PP acting as a core and alkali-soluble polyester COPET and polyethylene PE acting as a skin are produced by means of a chemical fiber composite spinning technology, wherein the COPET and PE are distributed as an islands-in-the-sea form, then the POY fibers are arranged as a fabric with a certain breadth by means of beam-warping, the fabric is subjected to stretching and hot-pressing by a hot roll such that the PE component having a low melting point is melted and joined to form a film, and then the COPET is dissolved away by means of an alkali solution such that a place where the COPET is present in the film become pores and PP fibers become the skeleton of the film, thus forming a lithium ion battery separator.