1. A grant generator for switching service section, comprising:
a structure comprising a plurality of binary round robin tree (BRRT) cells, each BRRT cell having one or more request inputs and a request output, a grant input and one or more grant signal outputs, and a control signal input, each of the BRRT cells providing a request output to another BRRT cell or to a final request output for the structure; and
a preference pointer coupled to the plurality of BRRT cells wherein the preference pointer is to provide one or more control signals to each of the BRRT cells at the control signal input of each BRRT cell.
2. The grant generator as recited in claim 1, wherein the grant generator is a functionality within a crossbar switch structure.
3. The grant generator as recited in claim 1, wherein the grant generator comprises a quadrature based grant generator.
4. The grant generator as recited in claim 3, wherein the quadrature based grant generator services four quadrants.
5. The grant generator as recited in claim 4, wherein each of the four quadrants corresponds to a plurality of ports, wherein each quadrant comprises a plane, and wherein the structure is expressed within each plane.
6. The grant generator as recited in claim 4, wherein the plurality of ports comprises eight ports and wherein a total of 32 ports is serviced.
7. The grant generator as recited in claim 1, wherein each of the plurality of BRRT cells comprises a type selected from the group consisting of \u2018basic\u2019 BRRT cells, \u2018enable\u2019 BRRT cells further including an enabling input, and \u2018single grant\u2019 BRRT cells having a single request input and a single grant output.
8. The grant generator as recited in claim 7, wherein the structure comprises an arrangement of the BRRT cells, and wherein the arrangement comprises a cascade of BRRT cells.
9. The grant generator as recited in claim 8, wherein the cascade comprises:
a first stage of BRRT cells, wherein the first stage comprises a first even positive whole number of BRRT cells;
a second stage of BRRT cells coupled to the first stage, wherein the second stage comprises a second even positive whole number of BRRT cells; and
a third stage of one or more BRRT cells coupled to the second stage.
10. The grant generator as recited in claim 9, wherein a first half of the BRRT cells of the first stage cascades into a first half of the BRRT cells of the second stage.
11. The grant generator as recited in claim 10, wherein a second half of the BRRT cells of the first stage cascades into a second half of the BRRT cells of the second stage.
12. The grant generator as recited in claim 9, wherein the BRRT cells of the second stage cascade into the one or more BRRT cells of the third stage.
13. The grant generator as recited in claim 9, wherein the cascade further comprises a fourth stage of one or more BRRT cells coupled to the third stage.
14. The grant generator as recited in claim 13, wherein the cascade further comprises a fifth stage of one or more BRRT cells coupled to the fourth stage.
15. The grant generator as recited in claim 14, wherein the BRRT cells of the first stage comprise \u2018enable\u2019 BRRT cells.
16. The grant generator as recited in claim 14, wherein the BRRT cells of the second stage and the third stage comprise \u2018basic\u2019 BRRT cells.
17. The grant generator as recited in claim 14, wherein the BRRT cells of the fourth stage and the fifth stage comprise \u2018single grant\u2019 BRRT cells.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
What we claimed is:
1. A method for delivering a composition to a targeted area of a tissue through an apparatus traversing a track in the tissue, the method comprising: providing a sealing pressure between the apparatus and a portion of the tissue surrounding the apparatus in the track traversed by said apparatus.
2. The method of claim 1 wherein the sealing pressure is greater than a delivery pressure of the composition delivered to the target tissue.
3. An apparatus for delivering a composition to a target area of a tissue, the apparatus traversing a track in the tissue, the apparatus comprising: an elongate tubular member, said member adapted to receive said composition at a proximal end, said member adapted to deliver said composition at a distal end; and means for inhibiting a migration of said composition from said target area along the track.
4. The apparatus for delivering a composition to a target area of a tissue according to claim 3, wherein the track in said tissue from said target area is created by insertion of said apparatus.
5. An apparatus for delivering a composition to a target area of a tissue, the apparatus traversing a track in the tissue, the apparatus comprising: an elongate tubular member, said member adapted to receive said composition at a proximal end, said member adapted to deliver said composition at a distal end; and means to selectively seal the composition in the apparatus.
6. The apparatus according to claim 5 wherein the means is adapted to selectively seal the composition in the apparatus as the apparatus is inserted through the track.
7. The apparatus according to claim 5 wherein the means is adapted to selectively seal the composition in the apparatus while the apparatus is positioned in the tissue.
8. An apparatus for delivering a composition to a target area of a tissue, the apparatus traversing a track in the tissue, the apparatus comprising: an elongate tubular inner member having a proximal end, a distal end and a lumen extending from the proximal end to the distal end of the inner member, said lumen adapted to receive a fluid at the proximal end of the inner member, and means for delivering said fluid from the distal end of the inner member to the target tissue by way of the lumen;
an elongate tubular central member having a proximal end, a distal end and a lumen extending from said central member proximal end to said central member distal end, said tubular inner member being coaxially positioned in said lumen of said central member;
an elongate tubular outer member having a proximal end, a distal end, lumen extending from said outer member proximal end to said outer member distal end, said tubular central member being coaxially located in said lumen of said outer member; and
means for inhibiting a migration of said composition along the track from said target area.
9. The apparatus according to claim 8 wherein the track is formed by the insertion of the apparatus into said tissue.
10. The apparatus according to claim 8 wherein said means for inhibiting a migration is located proximal to said means for delivering fluid.
11. The apparatus of claim 8 further comprising means for providing selective interruption of composition delivery to said target area.
12. The apparatus for delivering a composition to a target area of a tissue according to claim 8, wherein the means for delivering is stationary relative to the means for inhibiting migration of the composition along the track.
13. The apparatus according to claim 8 wherein the means for delivering is movable relative to the means for inhibiting.
14. The apparatus according to claim 8 wherein the distal end of the inner member is steerable.
15. The apparatus according to claim 8, where in the delivery means may be selectively positioned within the target area.
16. The apparatus according to claim 8, wherein the apparatus is introduced into the target tissue by surgical means.
17. The apparatus according to claim 8 further comprising imaging means for locating the target tissue.
18. The apparatus according to claim 8 further comprising diagnostic means.
19. The apparatus according to claim 8, further comprising an integral introducer.
20. The apparatus according to claim 8, wherein said means for inhibiting migration of said composition is a vacuum provided along a portion of the apparatus in the tissue such that an adjacent portion of tissue collapses onto the apparatus.
21. The apparatus according to claim 8 wherein the means for inhibiting migration of the composition comprise a selectively, radially expandable sleeve.
22. The apparatus according to claim 21 wherein the radially expandable sleeve is a balloon.
23. The apparatus according to claim 22 wherein the balloon is expanded by mechanical means.
24. The apparatus for delivering a composition to a target area of a tissue according to claim 21, wherein the radially expandable sleeve is biased toward a radially expanded position when the apparatus is stationary in said tissue, and wherein said radially expandable sleeve is sufficiently radially compressible to permit movement of said apparatus in said tissue.
25. The apparatus according to claim 24, wherein the radially expandable sleeve expands in response to a movement of said central member relative to said outer member.
26. The apparatus according to claim 25, wherein said movement of said central member relative to said outer member is along a longitudinal axis of said apparatus.
27. The apparatus according to claim 24, wherein said radially expandable sleeve has a proximal end and a distal end, said proximal end and distal ends being restrained from expanding, and said proximal end and distal end are separated by an expandable portion having a predetermined length.
28. The apparatus according to claim 27, wherein the proximal end of the sleeve is engaged by the distal end of the outer member and the distal end of the sleeve is engaged by the distal end of central member and wherein said longitudinal movement of said central member relative to a outer member causes a reduction in a distance between said proximal and distal ends of said sleeve so that said expandable portion of said sleeve expands radially outward.
29. The apparatus according to claim 28, wherein said distal end of said central member has a radially outwardly directed annular shoulder, said shoulder forming a proximally facing annular bearing surface, and wherein said distal end of said sleeve engages said bearing surface of said shoulder.
30. The apparatus according to claim 27, wherein the proximal end of the sleeve is secured to the distal end of the outer member, the distal end of the sleeve is engaged by the distal end of the central member, and wherein a longitudinal movement of the central member relative to the outer member in a direction to cause a reduction in the distance between the proximal and distal ends of the sleeve causes said expandable portion of sleeve to expand radially outwardly.
31. The apparatus according to claim 27, wherein the proximal end of the sleeve is secured to the distal end of the outer member, the distal end of the sleeve is engaged by the distal end of the central member, and wherein a longitudinal movement of the central member relative to the outer member to cause a reduction in the distance between the proximal and distal ends of the sleeve causes said expandable portion of sleeve to expand radially outwardly.
32. The apparatus according to claim 24, wherein said radially expandable sleeve is comprised of an elastic material.
33. An apparatus for delivering a composition to a target area of a tissue, the apparatus having a proximal end, a distal end, and a longitudinal axis extending from said proximal end to said distal end, the apparatus comprising:
an elongate tubular member having a lumen extending from a proximal end to a distal end, the lumen adapted to receive the composition at the proximal end of the member, the lumen in fluid communication with an outwardly directed opening at the distal end of the member, the opening for delivering the composition to the target area;
a sleeve mounted on an outer surface of the member at a point between said proximal end of said member and the opening, said sleeve radially expandable to form a seal between the apparatus and the tissue such that a migration of the composition along a track in the tissue from said target area is inhibited; and
means for selectively expanding said sleeve.
34. An apparatus for delivering a composition to a target area of a tissue, the apparatus traversing a track in the tissue, the apparatus comprising: an elongate tubular member, said member adapted to receive said composition at a proximal end, said member adapted to deliver said composition at a distal end; and
means for inhibiting a migration of said composition along the track from said target area.
35. An apparatus for delivering a composition to a target area of a tissue, the apparatus traversing a track in the tissue, the apparatus comprising:
an elongate tubular member, said member adapted to receive said composition at a proximal end, said member adapted to deliver said composition at a distal end; and means for inhibiting a migration of said composition from said target area along the track, the means providing a sealing pressure between the apparatus and a portion of the track
36. A method and apparatus for delivering a composition to a targeted area of a tissue, the apparatus traversing a track in the tissue, the method and apparatus comprising:
an elongate tubular member, said member adapted to receive said composition at a proximal end, said member adapted to deliver said composition at a distal end; and
providing a sealing pressure between the apparatus and a portion of the track to inhibit a migration of said composition from said target area along the track.
37. A method for delivering a composition to a targeted area of a tissue through an apparatus traversing a track in the tissue, the method comprising: providing a sealing pressure between the apparatus and a portion of the tissue surrounding the apparatus in the track traversed by said apparatus wherein said sealing pressure is provided by the apparatus.
38. An apparatus for delivering a composition to a target area of a tissue, the apparatus traversing a track in the tissue, the apparatus comprising: an elongate tubular member, said member adapted to receive said composition at a proximal end, said member adapted to deliver said composition at a distal end; and
means for inhibiting a migration of said composition along the track from said target area wherein said means provides a sealing pressure between the apparatus and the track.