Multi-carrier wireless communication access terminal and data transmission method
View Patent ↗A method, apparatus, and system permits an access terminal (“AT”) for a multi-carrier CDMA wireless communication system to concurrently receive data on N different-frequency carriers while restricting one or more parameters that affect data reception rate, so that limited resources of the AT will be sufficient to properly process data packets on the N carriers. The data rate controlling parameter may be “I,” the number of supported H-ARQ channels for one or more of the N carriers. A relationship may be defined between the number of supported forward and/or reverse link carriers, versus the number of supported H-ARQ channels and/or other data rate controlling parameters. Messages may enable identification of AT characteristics, and configuration and/or dynamic re-configuration of AT data communication capabilities that are related to different values of N and corresponding different data rate controlling parameters.
1. A method of establishing data communication parameters to govern wireless data communications between a CDMA Base Station (BS) and an Access Terminal (AT), the method comprising:
a) the AT determining values for variables n and rp corresponding to a particular AT, where n is a maximum number of different-frequency carriers on which the AT is configured to concurrently receive data, and rp is a different, additional data reception parameter that limits a rate at which the AT is configured to receive data on at least one of the n carriers, wherein said determining is performed based on an AT hardware resource which is able to communicate using the determined values for the variables n and rp, and said determining is not able to communicate using different selectable values for the variables n and rp;
b) the AT communicating the currently determined values of n and rp for the particular AT to the BS; and
c) the AT consequently communicating data with the BS on no more than n carriers, and at a rate limited by rp.
2. The method of claim 1 , wherein the values for n and rp for the AT are dynamically reconfigurable.
3. The method of claim 1 , wherein the values for n and/or rp vary based on changes in coding and/or modulation techniques that are currently permitted for communication between the BS and the AT.
4. The method of claim 1 , wherein rp indicates a maximum data rate for one or more of the n frequency bands receivable by the AT.
5. The method of claim 4 , wherein the rp parameter indicates a same maximum number of H-ARQ data channels for each of the n frequency channels that are currently allowed.
6. The method of claim 1 , wherein the rp parameter indicates a maximum number of H-ARQ data channels, within at least one of the n frequency channels, on which data packets can be communicated between the BS and the AT.
7. A method of balancing resource allocation in an Access Terminal (AT), comprising:
a) the AT selecting a value n>1 of different-frequency carriers on which signals representing data packets are to be communicated between the AT and a Base Station (BS);
b) the AT identifying a limited resource provided within the AT, usage of which is based on n and also on one or more other reception parameters rp(k);
c) the AT determining a value x1 for a first such reception parameter rp(1) such that the identified limited resource is sufficient for data communication on all n carriers when rp(1)=x1, and when rp(1) is set to an alternative value x2, the identified limited resource is insufficient, wherein rp(1) is settable to x2 under some circumstances; and
d) the AT communicating the n and rp(1) values for the AT to the BS as limits on the n and rp(1) parameters, respectively, for data communications between the BS and the AT.
8. The method of claim 7 , wherein after values for n and rp(1) have been communicated to the BS for use with the AT, a different value of n and a corresponding different value of rp(1) are subsequently determined and communicated to the BS for use with the AT.
9. The method of claim 7 , wherein rp(1) constrains a rate of packet data communication.
10. The method of claim 9 , wherein the parameter rp(1) specifies a limit to a number of time-division multiplexed H-ARQ channels on which data packets will be communicated between the AT and the BS on at least one of the n carriers.
11. The method of claim 10 , wherein rp(1) specifies a limit to the number of time-division multiplexed H-ARQ data channels that will be received by the AT on each of the n carriers.
12. The method of claim 7 , wherein the limited resource is buffer memory.
13. A transceiver operable as a CDMA Access Terminal (AT) to concurrently receive data packets from a Base Station (BS) via a number n>1 of different carriers occupying substantially non-overlapping frequency bands, comprising when operating:
a) a reception parameter rp that affects a maximum rate of data communication between the AT and the BS on at least one carrier, and which is settable to any one of a plurality of selectable values;
b) a data processing resource needed, in a quantity that is a function of n and rp, for data communication between the AT and the BS; and
c) a resource balancing module configured to accept as an input a selected value for one of n and rp, and to determine a value for the other of n and rp, such that data packets are communicated between the AT and the BS using the determined values of n and rp without requiring more of the data processing resource than is available within the AT.
14. The transceiver of claim 13 , further comprising a messaging module that is configured to communicate the determined values of n and rp to the BS.
15. The transceiver of claim 14 , wherein the data processing resource is buffer memory, and rp specifies one or more of a maximum coding rate, a maximum-rate modulation scheme, and a number of interlaced H-ARQ channels on which data packets are communicated between the AT and the BS for at least one carrier.
16. The transceiver of claim 15 , wherein rp specifies the number of interlaced H-ARQ channels on which data packets are communicated between the AT and the BS for at least one of the n carriers.
17. The transceiver of claim 16 , wherein rp specifies the number of interlaced H-ARQ channels on which data packets may be received on each of the n carriers.