1. An airship handling device, comprising:
a first support member mountable to a ground vehicle, wherein the first support member has a generally curved shape with a first end mountable to a front portion of the ground vehicle, and a second end spaced apart from the first end and approximately over a center of gravity of the ground vehicle;
a second support member operably coupled to the first support member and configured to rotatably move relative to the first support member about a support member axis, wherein the second support member is out of contact with the ground vehicle wherein the second support member includes a first end rotatably mounted to the second end of the first support member, and a second end spaced apart from the first end and having a lower elevation relative to the ground vehicle than the first end, and wherein the second support member has a generally curved shape corresponding, at least in part, to the curved shape of the first support member; and
a line attachment portion carried by the second support member and positioned to releasably couple a flexible handling line from an airship to the second support member, wherein the handling line is not coupled to a winch.
2. The airship handling device of claim 1 wherein:
the line attachment portion is proximate to the second end of the second support member.
3. The airship handling device of claim 2 wherein the first end of the first support member is the only portion of the airship handling device in contact with the ground vehicle.
4. The airship handling device of claim 1 wherein the second support member is configured to freely rotate through 360 degrees about the support member axis to self-align the second support member with the airship when the flexible handling line is releasably coupled to the second support member.
5. The airship handling device of claim 1 wherein the line attachment portion comprises a shackle positioned to releasably engage the flexible handling line.
6. The airship handling device of claim 1 wherein the line attachment portion comprises:
a base portion fixedly attached to a distal portion of the second support member;
an arm portion pivotably coupled to the base portion; and
a first line guide device and a second line guide device carried by the arm portion, wherein the first and second line guide devices are positioned to contact the flexible handling line, and wherein the second line guide device is movable relative to the first line guide device between (a) a first position adjacent to the first line guide device, and (b) a second position spaced apart from the first line guide device,
wherein in the first position, the first and second line guide devices are spaced apart by a distance less than a diameter of the flexible handling line, and
wherein in the second position, the first and second line guide devices are spaced apart by a distance greater than a diameter of the flexible handling line.
7. The airship handling device of claim 6 wherein:
the arm portion comprises a slot;
the first line guide device is fixedly attached proximate to an end of the arm portion; and
the second line guide device is at least partially received within the slot and movable relative to the slot between the first and second positions.
8. The airship handling device of claim 6 wherein the arm portion is pivotably movable relative to the base portion between a stowed position and an operating position in which the first and second line guide devices are positioned to contact the flexible handling line.
9. The airship handling device of claim 6, further comprising a handle assembly operably coupled to the arm portion and positioned to (a) releasably lock and unlock the arm portion in place relative to the base portion, and (b) move the second line guide device relative to the first line guide device.
10. The airship handling device of claim 6 wherein the first line guide device comprises a first hitch ball and the second line guide device comprises a second hitch ball.
11. The airship handling device of claim 1, further comprising the ground vehicle.
12. The airship handling device of claim 11 wherein the ground vehicle comprises a compact track or skid steer vehicle.
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. A method for controlling multichannel cascade between two media control servers, comprising:
receiving a service request message;
choosing a target channel from all the channels multichannel-cascaded with an opposite cascaded media control server according to the service request message and a preset channel usage rule; and
sending information about the determined target channel to the opposite cascaded media control server so as to enable the opposite cascaded media control server to carry out code stream switching according to the information about the target channel.
2. The method according to claim 1, wherein choosing a target channel from all the channels multichannel-cascaded with the opposite cascaded media control server according to the preset channel usage rule comprises:
determining whether a preset condition for setting a target channel is met; and
if the preset condition for setting a target channel is met, setting a target channel; if the preset condition for setting a target channel is not met, preempting a target channel according to a preset preemption rule.
3. The method according to claim 2, wherein the preset condition for setting a target channel comprises at least one of:
whether a channel among all the channels multichannel-cascaded with the opposite cascaded media control server is transmitting media signals of a target terminal; and
whether a channel among all the channels multichannel-cascaded with the opposite cascaded media control server is not in use.
4. The method according to claim 2, wherein the preemption rule comprises one or more of the following:
choosing a channel whose service type is the same as that of the media signals of the target terminal as the target channel from all the channels multichannel-cascaded with the opposite cascaded media control server;
choosing a channel used by a lower-level media control server as the target channel from all the channels multichannel-cascaded with the opposite cascaded media control server;
presetting service levels for various service types, and choosing a channel of the lowest-level service as the target channel from all the channels multichannel-cascaded with the opposite cascaded media control server; and
preempting a channel randomly as the target channel if a critical service is requested.
5. The method according to claim 1, wherein the information about the target channel may also comprise: an ID of the target channel, a service type set for the target channel, a type of a data code stream, and an ID of a conference terminal corresponding to the data code stream.
6. The method according to claim 1, wherein the information about the target information further comprises a device ID of an operation source media control server and a level of the media control server.
7. A device for controlling multichannel cascade between two media control servers, comprising:
a receiving unit, configured to receive a service request message;
a channel choosing unit, configured to choose a target channel from all the channels multichannel-cascaded with an opposite cascaded media control server according to the received service request message and a preset channel usage rule; and
a sending unit, configured to send information about the determined target channel to the opposite cascaded media control server so as to enable the opposite cascaded media control server to carry out code stream switching according to the information about the target channel.
8. The device according to claim 7, wherein the channel choosing unit comprises:
a condition judging unit, configured to determining whether a preset condition is met;
a condition executing unit, configured to set a target channel after the condition judging unit determins that the preset condition is met; and
a preempting unit, configured to preempt a target channel according to a preset preemption rule after the condition judging unit judges that the preset condition is not met.
9. The device according to claim 8, wherein the preset condition comprises at least one of:
whether any channel among all the channels multichannel-cascaded with the opposite cascaded media control server is transmitting media signals of a target terminal; and
whether any channel among all the channels multichannel-cascaded with the opposite cascaded media control server is not in use.
10. The device according to claim 8, wherein the preemption rule comprises one or more of the following:
choosing a channel whose service type is the same as that of the media signals of the target terminal as the target channel from all the channels multichannel-cascaded with the opposite cascaded media control server;
choosing a channel used by a lower-level media control server as the target channel from all the channels multichannel-cascaded with the opposite cascaded media control server;
presetting service levels for various service types, and choosing a channel of the lowest-level service as the target channel from all the channels multichannel-cascaded with the opposite cascaded media control server; and
preempting a channel randomly as the target channel if a critical service is requested.
11. A system for controlling multichannel cascade between two media control servers, comprising a multichannel-cascaded operation source media control server and an opposite cascaded media control server, wherein:
the operation source media control server is configured to receive a service request message from a target terminal, choose a target channel from all the channels multichannel-cascaded with the opposite cascaded media control server according to a preset channel usage rule, and send information about the determined target channel to the opposite cascaded media control server so as to enable the opposite cascaded media control server to carry out code stream switching according to the information about the target channel; and
the opposite cascaded media control server is configured to receive the information about the determined target channel and carry out the code stream switching according to the preset information about the target channel.