Methods and systems for transmission of multiple modulated signals over wireless networks
First Claim
1. A subscriber radio unit for a wireless communication system comprising:
- a radio configured to;
transmit bandwidth requests;
receive uplink bandwidth grants; and
transmit uplink data to a base station; and
a Media Access Control (MAC) module configured to;
generate a first bandwidth request with an indication of uplink bandwidth required for accommodating data of a first priority awaiting transmission on a first connection and provide the uplink data to the radio for transmission within an uplink bandwidth grant;
determine that additional bandwidth is necessary for transmission of uplink data of a second priority received at the subscriber radio unit on a second connection;
determine that the uplink bandwidth grant can accommodate a second bandwidth request;
insert, within the uplink bandwidth grant, the second bandwidth request with an indication of uplink bandwidth required for accommodating the data of the second priority; and
on receipt of a subsequent uplink bandwidth grant, allocate a first part of the subsequent uplink bandwidth grant to the uplink data awaiting transmission on the first connection and a second part of the subsequent uplink bandwidth to the uplink data awaiting transmission on the second connection, based on the first and second priorities and provide the UL data to the radio for transmission within the subsequent uplink bandwidth grant,whereby, if the uplink bandwidth grant cannot accommodate the second bandwidth request, the MAC module provides a poll-me bit for requesting an allocation of uplink UL bandwidth for enabling the subscriber radio unit to transmit the second bandwidth request.
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Accused Products
Abstract
A method and apparatus for requesting and allocating bandwidth in a broadband wireless communication system. The inventive 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. In accordance with this technique, currently active CPEs request bandwidth using previously 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. By using a combination of bandwidth allocation techniques, the present invention advantageously makes use of the efficiency benefits associated with each technique.
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Citations
7 Claims
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1. A subscriber radio unit for a wireless communication system comprising:
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a radio configured to; transmit bandwidth requests; receive uplink bandwidth grants; and transmit uplink data to a base station; and a Media Access Control (MAC) module configured to; generate a first bandwidth request with an indication of uplink bandwidth required for accommodating data of a first priority awaiting transmission on a first connection and provide the uplink data to the radio for transmission within an uplink bandwidth grant; determine that additional bandwidth is necessary for transmission of uplink data of a second priority received at the subscriber radio unit on a second connection; determine that the uplink bandwidth grant can accommodate a second bandwidth request; insert, within the uplink bandwidth grant, the second bandwidth request with an indication of uplink bandwidth required for accommodating the data of the second priority; and on receipt of a subsequent uplink bandwidth grant, allocate a first part of the subsequent uplink bandwidth grant to the uplink data awaiting transmission on the first connection and a second part of the subsequent uplink bandwidth to the uplink data awaiting transmission on the second connection, based on the first and second priorities and provide the UL data to the radio for transmission within the subsequent uplink bandwidth grant, whereby, if the uplink bandwidth grant cannot accommodate the second bandwidth request, the MAC module provides a poll-me bit for requesting an allocation of uplink UL bandwidth for enabling the subscriber radio unit to transmit the second bandwidth request. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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Specification