1. A rack server comprising:
a rack case comprising:
a front surface having a plurality of server slots for insertion of a plurality of servers; and
a rear surface having a plurality of card slots corresponding to the server slots for insertion of a plurality of extended interface cards;
at lease a server inserted into one of the server slots, the server having a rear end connected to a server connector; and
at least an extended interface card inserted into one of the card slots, the extended interface card having a card connector for electrically connecting to the server connector of the server.
2. The rack server according to claim 1, wherein the server is a blade server.
3. The rack server according to claim 1, wherein the extended interface card is a peripheral component interconnect-enhanced (PCI-E) card.
4. The rack server according to claim 1, wherein the server connector of the server is a slot.
5. The rack server according to claim 1, wherein the card connector of the extended interface card is a plugging terminal.
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 frame configuration method for time division multiplexed frames to transfer signals between a radio base station and a plurality of radio terminals, the frame configuration method comprising:
(a) allocating communication bandwidths of an identical time in different frames to different radio terminals such that there is substantially no mutual interference among those signals to be transferred at the identical time with respect to the different radio terminals; and
(b) allocating entire frame configuration information indicating frame configurations of all the time division multiplexed frames to one of the time division multiplexed frames,
wherein the step (b) allocates the entire frame configuration information to a frame to which a control information to be transmitted to all the radio terminals simultaneously is allocated,
wherein when there is a difference between total sums of the communication bandwidths allocated to the time division multiplexed frames, the step (a) allocates a next communication bandwidth to a frame for which a total sum of allocated communication bandwidths is the smallest among the time division multiplexed frames,
wherein the step (a) determines the next communication bandwidth to be allocated such that a total sum of allocated communication bandwidths for a reference frame selected in advance among the time division multiplexed frames is not exceeded by a total sum of allocated communication bandwidths for any other time division multiplexed frames.
2. The frame configuration method of claim 1, wherein the step (a) compares the difference between the total sums of the communication bandwidths with a prescribed threshold.
3. The frame configuration method of claim 2, wherein when the difference between the total sums of the communication bandwidths is less than or equal to the prescribed threshold, the step (a) regards the total sums of the communication bandwidths as identical.
4. A frame configuration method for time division multiplexed frames to transfer signals between a radio base station and a plurality of radio terminals, the frame configuration method comprising:
(a) allocating communication bandwidths in different frames to different radio terminals such that there is substantially no mutual interference among those signals to be transferred with respect to the different radio terminals; and
(b) allocating a plurality of frame configuration information each indicating a frame configuration of a respective time division multiplexed frame, to corresponding ones of the time division multiplexed frames respectively,
wherein the step (a) allocates a next communication bandwidth to a frame for which a total sum of allocated communication bandwidths is the smallest among the time division multiplexed frames,
wherein the step (a) determines the next communication bandwidth to be allocated such that a total sum of allocated communication bandwidths for a reference frame selected in advance among the time division multiplexed frames is not exceeded by a total sum of allocated communication bandwidths for any other time division multiplexed frames.