Methods and systems for transmission of multiple modulated signals over wireless networks
View Patent ↗A method and apparatus for requesting and allocating bandwidth in a broadband wireless communication system. The method and apparatus includes a combination of techniques that allow a plurality of CPEs to communicate their bandwidth request messages to respective base stations. One technique includes a “polling” method whereby a base station polls CPEs individually or in groups and allocates bandwidth specifically for the purpose of allowing the CPEs to respond with bandwidth requests. The polling of the CPEs by the base station may be in response to a CPE setting a “poll-me bit” or, alternatively, it may be periodic. Another technique comprises “piggybacking” bandwidth requests on bandwidth already allocated to a CPE. Currently active CPEs request bandwidth using unused portions of uplink bandwidth that is already allocated to the CPE. The CPE is responsible for distributing the allocated uplink bandwidth in a manner that accommodates the services provided by the CPE.
1. A cellular telephone operable to communicate with a base station in a wireless communication system, the cellular telephone comprising:
one or more processors having a Media Access Controller (MAC) operable to queue data pertaining to an uplink (UL) connection between the cellular telephone and the base station, the data associated with a respective priority; and
a transceiver operable to
transmit an explicit message to the base station informing the base station that the cellular telephone has data awaiting transmission to the base station over the UL connection between the cellular telephone and the base station,
subsequent to transmission of the explicit message, receive an indication of a first UL transmission resource, and
transmit information to the base station within the first UL transmission resource, the information indicative of an amount of data awaiting transmission to the base station over the UL connection between the cellular telephone and the base station.
2. A cellular telephone as claimed in claim 1 , wherein the MAC is further operable to:
receive downlink control information with current UL transmission resource allocations for a plurality of cellular telephones, including the cellular telephone;
identify in the downlink control information a second UL transmission resource allocated to the cellular telephone; and
allocate the second UL transmission resource to the UL connection between the cellular telephone and the base station based on a communication parameter associated with the UL connection between the cellular telephone and the base station.
3. A cellular telephone as claimed in claim 2 , wherein the second UL transmission resource is allocated based on a communication parameter which includes a priority of the UL connection between the cellular telephone and the base station.
4. A cellular telephone as claimed in claim 1 , wherein subsequent to transmission of information indicative of an amount of data awaiting transmission to the base station, the cellular telephone receives downlink control information provided in a subsequent frame, the downlink control information comprising an indication of a second UL transmission resource for the cellular telephone.
5. A cellular telephone as claimed in claim 1 , wherein the information indicative of an amount of data awaiting transmission to the base station identifies UL transmission resources required in addition to UL transmission resources previously allocated to the cellular telephone.
6. A cellular telephone operable to communicate with a base station in a wireless communication system, the cellular telephone comprising:
one or more processors having a Media Access Controller (MAC) operable to queue data pertaining to a first uplink (UL) connection between the cellular telephone and the base station, the data associated with a respective priority; and
a transceiver operable to
transmit a message requesting the base station to poll the cellular telephone,
in response to the message, receive an indication of a first UL transmission resource,
transmit information to the base station within the first UL transmission resource, the information indicative of an amount of data awaiting transmission to the base station over the first UL connection between the cellular telephone and the base station, and
receive, in downlink control information, an allocation of a second UL transmission resource for the cellular telephone in response to the information indicative of an amount of data awaiting transmission to the base station over the first UL connection between the cellular telephone and the base station.
7. A cellular telephone as claimed in claim 6 , wherein the MAC is further operable to allocate the second UL transmission resource to one or more UL connections between the cellular telephone and the base station of a plurality of UL connections between the cellular telephone and the base station, which could be different from the first UL connection between the cellular telephone and the base station.
8. A cellular telephone as claimed in claim 6 , wherein the MAC is further operable to allocate the second UL transmission resource to one or more UL connections between the cellular telephone and the base station of a plurality of UL connections between the cellular telephone and the base station, based on a communication parameter associated to each UL connection between the cellular telephone and the base station of the plurality of UL connections between the cellular telephone and the base station.
9. A cellular telephone as claimed in claim 8 , wherein the communication parameter includes a quality of service parameter of each UL connection between the cellular telephone and the base station of the plurality of UL connections between the cellular telephone and the base station serviced by the cellular telephone.