1. A slide-type core retainer for a sample collector comprising a sampler tube driven into a sea floor through a driving unit, the slide-type core retainer comprising:
a catcher holder detachably coupled to a tip end of the sampler tube;
a catcher installed on an inner peripheral surface of a tip end of the catcher holder and configured to allow sediment to be introduced into the sampler tube and prevent the introduced sediment from being lost using resiliency; and
an openingclosing control member slidably installed inside the catcher holder so as to control opening and closing of the catcher,
wherein the openingclosing control member is coupled to the catcher before collection of samples to make a control so that the catcher compulsorily remains opened, and the openingclosing control member slides into an inner side of the catcher holder while being separated from the catcher by the resistance of the solid sediment of deep strata to make a control such that the catcher is closed, when resistance is generated by solid sediment of deep strata after the sampler tube is driven into the sediment.
2. The slide-type core retainer as claimed in claim 1, wherein the openingclosing control member has a pipe-like shape whose opposite ends are opened so that it prevents the generation of resistance by soft surface sediment after the sampler tube is driven into the sediment.
3. The slide-type core retainer as claimed in claim 1, wherein the catcher comprises a plurality of resilient pieces, and one side of each of the resilient pieces is mounted on the inner peripheral surface of the tip end of the catcher holder and an opposite side of each of the resilient pieces contacts an outer peripheral surface of the openingclosing control member before collection of samples, and the opposite side of each of the resilient pieces contacts each other at a central portion of the catcher holder when the sampler tube is separated from the openingclosing control member by the resistance of the solid sediment of deep strata after the sampler tube is driven into the sediment.
4. The slide-type core retainer as claimed in claim 2, wherein the catcher comprises a plurality of resilient pieces, and one side of each of the resilient pieces is mounted on the inner peripheral surface of the tip end of the catcher holder and an opposite side of each of the resilient pieces contacts an outer peripheral surface of the openingclosing control member before collection of samples, and the opposite side of each of the resilient pieces contacts each other at a central portion of the catcher holder when the sampler tube is separated from the openingclosing control member by the resistance of the solid sediment of deep strata after the sampler tube is driven into the sediment.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. An apparatus for reordering traffic flow templates (TFTs) in a mobile communication system including a primary General Packet Radio Service (GPRS) tunneling protocol (GTP) tunnel for transmitting and receiving packet data to and from a mobile station and one or more secondary GTP tunnels having the same mobile station address as the primary GTP tunnel and each being divided into different TFTs, the TFTs each including different packet filter contents so that the secondary GTP tunnels are separated using TFT packet filtering, the apparatus comprising:
a controller adapted to
sequentially perform TFT packet filtering on input packet data for the TFTs;
manage statistical data of packet data that are successfully TFT packet filtered for the TFTs;
reorder an order of the TFTs by comparing the statistical data of the packet data that are successfully TFT packet filtered for the TFTs if a preset period expires; and
a memory adapted to store packet filter contents for each of the TFTs, and store statistical data for packet data that are successfully TFT packet filtered for each of the TFTs.
2. The apparatus of claim 1, wherein the controller is further adapted to sequentially reorder the TFTs in order of a highest frequency of packet data that are successfully packet filtered.
3. The apparatus of claim 1, wherein the controller comprises:
a TFT packet filter adapted to sequentially perform TFT packet filtering on the input packet data with respect to the TFTs;
a statistical processor adapted to manage statistical data for the packet data that are successfully TFT packet filtered for each of the TFTs;
a timer adapted to count the preset period, and generate a signal representing an expiration of the preset period; and
a reordering device adapted to sequentially reorder the TFTs in order of high frequency of packet data that are successfully TFT packet filtered by comparing statistical data of the packet data that are successfully TFT packet filtered for the TFTs according to the generated signal.
4. The apparatus of claim 1, wherein the controller is further adapted to initialize statistical data of the packet data that are successfully TFT packet filtered for each of the TFTs, after reordering the TFTs.
5. The apparatus of claim 1, wherein the controller is further adapted to compare frequencies of packet data that are successfully TFT packet filtered for two consecutive TFTs among the TFTs, and reorder the TFTs by swapping the order of the two TFTs if there is a difference between the frequencies of the packet data.
6. The apparatus of claim 1, wherein the controller is further adapted to sequentially reorder the TFTs in order of high frequency of the packet data that are successfully TFT packet filtered, if the frequency of the packet data that are successfully TFT packet filtered is larger than a multiple preset between the TFTs.
7. The apparatus of claim 1, wherein the controller is further adapted to reorder the TFTs by swapping the order of consecutive TFTs among the TFTs, if frequency of the packet data that are successfully TFT packet filtered for the two consecutive TFTs is larger than a multiple preset between the two consecutive TFTs.
8. A method for reordering traffic flow templates (TFTs) in a mobile communication system including a primary GPRS (General Packet Radio Service) tunneling protocol (GTP) tunnel for transmitting and receiving packet data tofrom a mobile station and one or more secondary GTP tunnels having the same mobile station address as the primary GTP tunnel and each being divided into different TFTs, the TFTs each including different packet filter contents so that the secondary GTP tunnels are separated through TFT packet filtering, the method comprising the steps of:
sequentially performing TFT packet filtering on input packet data for the TFTs, and managing statistical data of packet data that are successfully TFT packet filtered for the TFTs;
comparing statistical data of the packet data that are successfully TFT packet filtered for each of the TFTs, if a preset period expires; and
reordering an order of the TFTs based on the comparison result of the statistical data.
9. The method of claim 8, wherein the TFTs are sequentially reordered in order of high frequency of packet data that are successfully packet filtered.
10. The method of claim 8, further comprising the step of initializing statistical data of the packet data that are successfully TFT packet filtered for each of the TFTs, after reordering the TFTs.
11. The method of claim 8, wherein the TFT reordering step comprises the step of comparing frequencies of packet data that are successfully TFT packet filtered for two consecutive TFTs among the TFTs, and reordering the TFTs by swapping the order of the two TFTs if there is a difference between the frequencies of packet data.
12. The method of claim 8, wherein the TFT reordering step comprises the step of sequentially reordering the TFTs in order of high frequency of the packet data that are successfully TFT packet filtered, if the frequency of the packet data that are successfully TFT packet filtered is larger than a multiple preset between the TFTs.
13. The method of claim 8, wherein the TFT reordering step comprises the step of reordering the TFTs by swapping the order of two consecutive TFTs among the TFTs, if the frequency of the packet data that are successfully TFT packet filtered for the two consecutive TFTs is larger than a multiple preset between the two consecutive TFTs.