What is claimed is:
1. A metal tube for guardrail comprises a C section-shaped metal tube having two lengthwise bent ends each having a fastening member, and an inner abutment mechanism each having a lengthwise abutment member and a mating fastening member at either end engaged with the fastening member of the metal tube when the inner abutment mechanism is inserted into the metal tube for securing each metal tube and the corresponding inner abutment mechanism together to form a complete assemblying metal tube for guardrail.
2. The guardrail of claim 1, wherein the fastening member further comprises a lengthwise inner section and a lengthwise groove of each bent end of the outer metal tube by bending and the mating fastening member further comprises a groove at each of bent end of the inner abutment mechanism.
3. The guardrail of claim 1, wherein the fastening member further comprises a horizontal inner section perpendicular to a flat end of each bent end of the outer metal tube by bending and the mating fastening member further comprises a groove at each of bent end of the inner abutment mechanism
4. A guardrail comprising:
a pair of parallel metal tubes each having a section of C, a lengthwise gap, and two first bent ends along the gap, each first bent end having a lengthwise inner section and a lengthwise first groove;
a pair of inner abutment mechanisms each having a section of U, a horizontal abutment member, a trough defined by two vertical sections and the abutment member, and a pair of second bent ends along the trough, each second bent end having two lengthwise outer sections and two lengthwise second grooves wherein the second bent end is put on the inner section with the outer section inserted into the first groove and the inner section inserted into the second groove for securing each metal tube and the corresponding abutment mechanism together; and
a protective board having either end urged against the abutment member and the first bent ends, thereby securing the protective board between the abutment mechanisms.
5. The guardrail of claim 4, wherein either vertical section is bent to cause the vertical section and the first bent end to be at the same flat surface urged against the protective board.
6. A guardrail comprising:
a pair of parallel metal tubes each having a section of C, a lengthwise gap, and two vertical ends along the gap, each vertical end having a lengthwise horizontal inner section;
a pair of inner abutment mechanisms each including a horizontal abutment member having two lengthwise bent ends and two lengthwise grooves in the bent ends wherein the bent end is put on the inner section with the inner section inserted into the groove for securing each metal tube and the corresponding abutment mechanism together; and
a protective board having either end urged against the abutment member and the vertical ends, thereby securing the protective board between the abutment mechanisms.
7. The guardrail of claim 6, wherein either abutment member is bent to have a section of U so that the protective board is urged by the vertical ends and either abutment member.
8. A metal tube structure for guardrail comprising:
an outer metal tube having a section of C, a lengthwise gap, and two first bent ends along the gap, each first bent end being bent to form a lengthwise first groove; and
an inner abutment mechanisms having a section of U, a horizontal abutment member, a trough defined by two vertical sections and the abutment member, a pair of second bent ends along the trough, each second bent end being bent to form a lengthwise second groove;
wherein each of the second groove of the second bent end of the inner abutment mechanisms is inserted into each corresponding first groove of the first bent end of the outer metal tube for securing the outer metal tube and the inner abutment mechanism together to form a complete assemblying metal tube for guardrail.
9. A metal tube structure for guardrail comprising:
an outer metal tube having a section of C, a lengthwise gap formed between two flat ends, a horizontal inner section formed perpendicular to each of the flat end; and
an inner abutment mechanism having a horizontal abutment member which has two bent ends each with a groove formed therein;
wherein each of the horizontal inner section of the outer metal tube is inserted into each of corresponding groove of the inner abutment mechanism together to form a complete assemblying metal tube for guardrail.
10. The guardrail of claim 9, wherein the inner abutment mechanism is further shaped to have a section of U, and the inner abutment mechanism has two bent ends, each extended from a vertical section and a horizontal abutment member of the section U, and each of the Inner sections of the metal tube is inserted into each of the corresponding bent end of the inner abutment mechanism together to form a complete assemblying metal tube for guardrail.
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. In a cellular wireless communication system supporting a broadcast service, a method comprising:
transmitting broadcast overhead information corresponding to a broadcast session on an overhead transmission channel from a first device, wherein the broadcast overhead information includes a protocol stack, options in the protocol stack, and information to set up and synchronize a broadcast service;
scanning for broadcast overhead information corresponding to the broadcast session on the overhead transmission channel using a second device;
receiving the broadcast overhead information on the second device;
tuning the second device using the received broadcast overhead information;
receiving the broadcast session on a broadcast transmission channel on the second device.
2. The method as in claim 1, wherein:
the broadcast service is transmitted by a content server;
the broadcast service has a corresponding protocol stack having an application layer and a transport layer; and
the content server independently controls the application layer and the transport layer protocols.
3. The method as in claim 1, wherein the broadcast service is transmitted as Internet Protocol data packets.
4. The method as in claim 1, further comprising:
during broadcast transmission updating a portion of the broadcast overhead information; an
transmitting the broadcast overhead information with the updated portion.
5. The method as in claim 1, wherein the system further comprises a packetized data service network, the method further comprising:
the packetized data service network updating header compression information; and
the packetized data service network transmitting the updated header compression information on an overhead transmission channel.
6. In a cellular wireless communication system supporting a broadcast service, a method comprising:
transmitting broadcast overhead information from a first device;
receiving the broadcast overhead information on a second device, the broadcast overhead information corresponding to the broadcast session on an overhead transmission channel, wherein the broadcast overhead information includes a protocol stack, options in the protocol stack, and information to set up and synchronize a broadcast service;
accessing the broadcast session on a broadcast transmission channel; and
the broadcast overhead information to receive broadcast content of the broadcast session.
7. The method as in claim 6, wherein:
the broadcast service is transmitted by a content server;
the broadcast service has a corresponding protocol stack having an application layer and a transport layer; and
the content server independently controls the application layer and the transport layer protocols.
8. The method as in claim 6, wherein the broadcast service is transmitted as Internet Protocol data packets.
9. The method as in claim 6, further comprising:
during a broadcast transmission receiving updated broadcast overhead information on an overhead transmission channel; and
processing broadcast content received on the broadcast transmission channel using the updated broadcast overhead information.
10. The method as in claim 6, wherein the system further comprises a packetized data service network, the method further comprising:
receiving updated header compression information from the packetized data service network on an verhead transmission channel; and
using the updated header compression information to receive the broadcast content.
11. A wireless apparatus for usage in a cellular wireless communication system, comprising:
means for receiving broadcast overhead information corresponding to the broadcast session on an overhead transmission channel of the cellular wireless communication system, wherein the broadcast overhead information includes a protocol stack, options the protocol stack, and information to set up and synchronize a broadcast service;
means for accessing the broadcast session on a broadcast transmission channel of the cellular wireless communication system; and
means for the broadcast overhead information to receive broadcast content of the broadcast session.
12. The apparatus as in claim 11, wherein:
the broadcast service is transmitted by a content server;
the broadcast service has a corresponding protocol stack having an application layer and a transport layer; and
the content server independently controls the application layer and the transport layer protocols.
13. The apparatus as in claim 11, wherein the broadcast service is transmitted as Internet Protocol data packets.
14. The apparatus as in claim 11, wherein the system further comprises a packetized data service network, the method further comprising:
means for receiving updated header compression information from the packetized data service network on an overhead transmission channel; and
means for using the updated header compression information to receive the broadcast content.
15. In a wireless communication system supporting a broadcast service, the wireless communication system having a plurality of cells, each cell having a base station for communication with multiple mobile stations, a packetized data service network being coupled to at least one of the base stations, the method comprising:
transmitting a broadcast session on a broadcast transmission channel from the at least one of the base stations to the mobile stations;
transmitting broadcast overhead information corresponding to the broadcast session on an overhead transmission channel from the at least one of the base stations to the mobile stations, wherein the broadcast overhead information includes a protocol stack, options in the protocol stack, and information to set up and synchronize a broadcast service;
the packetized data service network updating header compression information; and
the packetized data service network transmitting the updated header compression information on the overhead transmission channel.
16. In a cellular wireless communication system supporting a broadcast service, a method comprising:
requesting broadcast overhead information corresponding to the broadcast session, wherein the broadcast overhead information includes a protocol stack, options in the protocol stack, and information to set up and synchronize a broadcast service;
receiving the broadcast overhead information on an overhead transmission channel;
accessing the broadcast session on a broadcast transmission channel; and
processing the broadcast overhead information to receive broadcast content of the broadcast session.
17. A wireless communications apparatus comprising:
a memo storage device adapted for storing computer-readable instructions; and
a processor adapted for processing the computer-readable instructions to:
request broadcast overhead information corresponding to the broadcast session, wherein the broadcast overhead information includes a protocol stack, options in the protocol stack, and information to set up and synchronize a broadcast service;
receive the broadcast overhead information on an overhead transmission channel;
access the broadcast session on a broadcast transmission channel; and
process the broadcast overhead information to receive broadcast content of the broadcast session.