1. In a packet processor having a local packet memory (LPM) for storing packet data during processing, the LPM having a plurality of memory cells, the memory cells accessible by at least one memory access port, a system for managing port contention between at least two controllers that access the memory cells, comprising:
a buffer for queuing write requests to the at least one memory port for a first one of the controllers; and
a logic mechanism associated with the buffer for determining whether a write request from said first one of the controllers is within said buffer and is directed at a first one of the memory cells, and if so, whether a read request exists from a second one of the controllers and is directed at said first one of the memory cells;
wherein, if a read request exists from said second one of the controllers and is directed at said first one of the memory cells while said write request is buffered, said read request is delayed until said write request has completed regardless of when said read request occurs.
2. The system of claim 1 wherein said logic mechanism prevents download of packet data from the LPM before queued write requests to the packet data are completed.
3. The system of claim 1 wherein the LPM comprises a set of individual memory cells, each cell having an access port.
4. The system of claim 3 wherein if the port is busy, the logic mechanism checks the buffer for write requests, and finding a write request, issues a command to temporarily suspend packet downloads from the LPM until all write requests in said buffer are completed.
5. The system of claim 3 wherein packet downloading is managed by a packet management unit (PMU) issuing read requests, and said write requests sent to said buffer are other than read requests from said PMU, said PMU reads and said buffer sharing the same port with said PMU, said PMU reads having priority over reads in said buffer, wherein, for packets having data extensive enough to occupy two or more memory cells, packet data is interleaved among cells, such that consecutive cells are dedicated to different packets, ensuring that port contention is limited to alternate cycles.
6. The system of claim 3 wherein packets are assigned an identifier, and wherein said write requests in said buffer are tagged with said identifier, said logic mechanism issuing commands along with said identifier.
7. In a packet processor having a local packet memory (LPM) for storing packet data during processing, the LPM having a plurality of memory cells accessible by at least one access port, a method for managing contention between at least two controllers that access the memory cells, comprising the steps of:
queuing write requests from a first controller to the port in a buffer; and
determining, by a logic mechanism associated with the buffer, whether a write request from the first one of the controllers is within the buffer and is directed at a first one of the memory cells, and if so;
determining whether a read request exists from a second one of the controllers and is directed at the first one of the memory cells; and
if a read request exists from the second one of the controllers and is directed at the first one of the memory cells while the write request is buffered, delaying the read request until said write request has completed, regardless of when said read request occurs.
8. The method of claim 7 for managing contention between at least two controllers that access memory cells, further comprising:
preventing download of packet data from the LPM before all queued write requests to the data are completed, wherein, in said step of determining whether a write request is within the buffer, the logic mechanism checks the buffer for write requests, and finding a write request, issues a command to temporarily suspend packet downloads from the LPM until the queued write requests in the buffer are completed.
9. The method of claim 8 wherein packet downloading is managed by a packet management unit (PMU) issuing read requests, and write requests sent to the buffer are other than read requests from the PMU.
10. The method of claim 8 further comprising:
assigning an identifier to packets in process; and
tagging requests in the buffer with identifiers; wherein
the logic mechanism issues commands along with the packet identifiers.
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.-18. (canceled)
19. A climate simulation system (10) with cold accumulation comprising:
at least one air-conditioning room (20), providing preferred climatological conditions;
at least one external unit (30) providing necessary cooling for the air-conditioning room (20);
at least one internal unit (40) providing heating, cooling, humidification and dehumidification within the air-conditioning room (20);
at least one cab sensor (50) measuring a temperature and humidification value of the air-conditioning room (20);
at least one humidifier (60) providing a necessary humidification for the air-conditioning room (20);
at least one heater (70) providing a necessary heat for the air-conditioning room (20),
at least one illuminator (80) providing a necessary illumination for the air-conditioning room (20);
at least one dosing pump providing a proportional flow of cooling liquid required for the cooling of the air-conditioning room (20) and a three-way or four-way mixer valve (90) having a plurality of outlets; and
at least one control unit (100) controlling the temperature and humidification values of the air conditioning room (20) and providing a preferred temperature and humidification value and cold accumulation for the air conditioning room (20).
20. A climate simulation system (10) with cold accumulation according to claim 19, wherein the at least one external unit includes at least one compressor (31), a condenser (32), a condenser fan (33), an evaporator (34), a refrigerating liquid accumulator tank (35), a refrigerating liquid (36) and temperature probe (37).
21. A climate simulation system (10) with cold accumulation according to claim 19, further comprising at least one evaporator (34) disposed in a refrigerating liquid accumulator tank (35) and providing cooling of a refrigerating liquid (36).
22. A climate simulation system (10) with cold accumulation according to claim 20, further comprising at least one evaporator (34) disposed in the refrigerating liquid accumulator tank (35) and providing cooling of the refrigerating liquid (36).
23. A climate simulation system (10) with cold accumulation according to claim 20, further comprising at least one accumulator recirculation pump (93) placed at an output of the refrigerating liquid accumulator tank (35) and providing the refrigerating liquid (36) to be depressed from the refrigerating liquid accumulator tank to a battery (41).
24. A climate simulation system (10) with cold accumulation according to claim 19, wherein the internal unit (40), the cab sensor (50), the humidifier (60), the heater (70) and the illuminator (80) are contained within the at least one air-conditioning room (20).
25. A climate simulation system (10) with cold accumulation according to claim 23, wherein the mixer valve (90) is a four-way mixer valve comprising at least one accumulator outlet (91), at least one accumulator rotation (91.1), at least one battery inlet (92) and at least one battery outlet (92.1).
26. A climate simulation system (10) with cold accumulation according to claim 19, wherein the at least one control unit (100) providing the temperature and humidification values of the air-conditioning room to be selected for day or night, and the values entered or selected on an hourly setting.
27. A climate simulation system (10) with cold accumulation according to claim 19, further comprising a refrigerating liquid (36) placed in a refrigerating liquid accumulator tank (35) and providing the cooling of the air-conditioning room.
28. A climate simulation system (10) with cold accumulation according to claim 27, wherein the at least one control unit calculates the necessary temperature value of the refrigerating liquid according to the preferred temperature of the air-conditioning room (20).
29. A climate simulation system (10) with cold accumulation according to claim 19, having at least one four-way mixer valve (90) wherein a clearance ratio of valve inlets and valve outlets (91, 92) are proportionally adjusted.
30. A climate simulation system (10) with cold accumulation according to claim 19, wherein the at least one control unit (100) calculates a clearance ratio of valve (90) inlets and valve outlets (91, 91.1, 92, 92.1) according to a deviation in the air-conditioning room (20) temperature and enabling the valve (90) to meet the clearance ratio.
31. A climate simulation system (10) with cold accumulation according to claim 19, wherein one of the plurality of outlets of the mixer valve (90) is directly connected to a battery outlet (92.1) for a battery (41) or to a refrigerating liquid accumulator tank (35)
32. A climate simulation system (10) with cold accumulation according to claim 23, further comprising at least one battery circulation pump (93.1) placed in one of the plurality of outlets of the four-way mixer valve (90) and providing a refrigerating liquid (36) in the battery to be depressed into the liquid accumulator tank (35).
33. A climate simulation system (10) with cold accumulation according to claim 19, wherein the mixer valve (90) is a three-way mixer valve and comprises a gap ratio proportionally adjusted.
34. A climate simulation system (10) with cold accumulation according to claim 23, further comprising at least one battery circulation pump (93.1) providing a circulation within the battery (41) and the cooling of the battery homogenously.
35. A climate simulation system (10) with cold accumulation according to claim 20, wherein at least one compressor (31) providing a constant cooling of the liquid (36) within the refrigerating liquid accumulator tank (35).
36. A climate simulation system (10) with cold accumulation according to claim 23, wherein the at least one control unit (100) controlling the temperature of the air-conditioning room (20) proportionally according to a temperature of the refrigerating liquid (36) in the cab sensor (50) andor the battery.
37. A climate simulation system (10) with cold accumulation according to claim 23, further comprising at least one temperature sensor (41.1) measuring a temperature of the refrigerating liquid (36) within the battery (41).