System, apparatus and method of scheduling transmissions

An apparatus comprising:

• a channel estimator to estimate an obsoleteness rate of a downlink channel based on knowledge of an uplink channel wherein, the knowledge includes a mobile station velocity as estimated at the mobile station;
• a scheduler to schedule data transmissions;
• a classifier to classify the mobile station as “fast” or “slow” based on the estimated obsoleteness rate;
• a beam forming unit to form an antenna lobe pattern to a direction of the mobile station according to a desired beam forming scheme based on a class of the channel quality wherein, the beam forming unit is able to allocate a Maximum-Ratio-Combining beam forming scheme to two or more antennas to transmit a first signal to a first mobile station whose channel is classified as “fast,” and to allocate a Space Division Multiple Access (SDMA) beam forming scheme to the two or more antennas to transmit a second signal to a second mobile station whose channel is classified as “slow”;
• and
• a resources allocator to allocate resources to the mobile station based on the estimated obsoleteness rate of the downlink channel knowledge, wherein the resources include at least one of:
• the desired beam forming scheme, a time slot, a frequency band, a coding rate and a modulation scheme.

A base station comprising:

• a channel estimator to estimate an obsoleteness rate of a downlink channel based on knowledge of an uplink channel wherein, the knowledge includes a mobile station velocity as estimated at the mobile station;
• a scheduler to schedule data transmissions;
• an antenna array to transmit and receive the data transmissions over one or more channels;
• a classifier to classify the mobile station as “fast” or “slow” based on the estimated obsoleteness rate;
• a beam forming unit to form an antenna beam according to a desired beam forming scheme based on a class of the channel quality wherein, the beam forming unit is able to allocate a Maximum-Ratio-Combining beam forming scheme to two or more antennas to transmit a first signal to a first mobile station whose channel is classified as “fast,” and to allocate a Space Division Multiple Access (SDMA) beam forming scheme to the two or more antennas to transmit a second signal to a second mobile station whose channel is classified as “slow”;
• and
• a resources allocator to allocate resources to the mobile station based on the estimated obsoleteness rate of the downlink channel knowledge, wherein the resources include at least one of the desired beam forming scheme, a time slot, a frequency band, a coding rate and a modulation scheme.

A wireless communication system comprising:

• a base station having at least:
• a channel estimator to estimate an obsoleteness rate of a downlink channel based on knowledge of an uplink channel wherein, the knowledge includes a mobile station velocity as estimated at the mobile station;
• a scheduler to schedule data transmissions;
• a classifier to classify the mobile station as “fast” or “slow” based on the estimated obsoleteness rate;
• a beam forming unit to form an antenna beam according to a desired beam forming scheme based on a class of the channel Quality wherein, the beam forming unit is able to allocate a Maximum-Ratio-Combining beam forming scheme to two or more antennas to transmit a first signal to a first mobile station whose channel is classified as “fast,” and to allocate a Space Division Multiple Access (SDMA) beam forming scheme to the two or more antennas to transmit a second signal to a second mobile station whose channel is classified as “slow”;
• and
• a resources allocator to allocate resources to the mobile station based on the estimated obsoleteness rate of the downlink channel knowledge, wherein the resources include at least one of the desired beam forming scheme, a time slot, a frequency band, a coding rate and a modulation scheme.

An article comprising:

• a computer readable medium encoded with computer executable instructions that when executed result in:
• receiving over an uplink, a mobile station velocity as estimated at the mobile station;
• learning knowledge about a downlink channel based on a received signal over an uplink channel, the received signal indicating the mobile station velocity;
• estimating an obsoleteness rate of the knowledge of the downlink channel;
• classifying the mobile station as “fast” or “slow” based on the estimated obsoleteness rate;
• allocating a Maximum-Ratio-Combining beam forming scheme to a first mobile station classified as “fast”;
• and allocating a Space Division Multiple Access (SDMA) beam forming scheme to a second mobile station classified as “slow”;
• and scheduling data transmissions over the downlink channel by allocating resources to the mobile station based on the estimated obsoleteness rate of the knowledge of the downlink channel, wherein the resources include at least one of:
• the Maximum-Ratio-Combining beam forming schemes the SDMA beam forming scheme, a time slot, a frequency band, a coding rate and a modulation scheme.