Method and apparatus for configuring sounding signals in a wireless communication network
The teachings presented herein propose a separation between the configuration of a sounding signal, and the initialization of the sounding signal. In other words, in at least one example embodiment proposed herein, a base station or other controlling entity separates the selection of sounding signal parameters (sounding signal configuration) and the signaling of that configuration information to a mobile terminal from the Ordering” or other initiation of sounding signal transmission. Thus, a mobile station may be sent sounding signal configuration information and subsequently be commanded (implicitly or explicitly) to begin sounding signal transmissions according to the previously provided configuration information.
1. A method of controlling the transmission of sounding signals by a mobile station operating in a wireless communication network comprising:
sending configuration parameters for a sounding signal to be transmitted by the mobile station; and
subsequently sending a command or other initiating signal to the mobile station separately from said configuration parameters, to cause the mobile station to transmit the sounding signal according to said configuration parameters, wherein subsequently sending a command or other initiating signal comprises implicitly commanding the mobile station to initiate sounding signal transmission by sending scheduling information to the mobile station.
2. The method of claim 1 , further comprising sending updated configuration parameters on a first time basis, and sending commands or other initiating signals to cause the mobile station to transmit the sounding signal on a second, faster time basis.
3. The method of claim 1 , further comprising using Radio Resource Control (RRC) signaling to send said configuration parameters.
4. The method of claim 3 , further comprising using Medium Access Control (MAC) signaling to send the command or other initiating signal.
5. The method of claim 4 , further comprising sending one or more additional configuration parameters in conjunction with sending the commands or other initiating signals, such that the mobile station transmits the sounding signal based on earlier-received said configuration parameters, as modified by or updated by the one or more additional configuration parameters.
6. The method of claim 1 , wherein subsequently sending the command or other initiating signal to the mobile station comprises implicitly commanding the mobile station to initiate sounding signal transmission by sending an uplink scheduling grant to the mobile station.
7. The method of claim 1 , wherein subsequently sending the command or other initiating signal to the mobile station comprises explicitly commanding the mobile station to initiate sounding signal transmission by sending a sounding signal initiation command via downlink signaling.
8. A base station configured to control the transmission of sounding signals by a mobile station, said base station comprising one or more processing circuits configured to:
send configuration parameters for a sounding signal to be transmitted by the mobile station; and
subsequently send a command or other initiating signal to the mobile station separately from said configuration parameters, to cause the mobile station to transmit the sounding signal according to said configuration parameters, wherein subsequently sending a command or other initiating signal comprises implicitly commanding the mobile station to initiate sounding signal transmission by sending scheduling information to the mobile station.
9. The base station of claim 8 , wherein the one or more processing circuits are further configured to send updated configuration parameters on a first time basis, and send commands or other initiating signals to cause the mobile station to transmit the sounding signal on a second, faster time basis.
10. The base station of claim 8 , wherein the one or more processing circuits are further configured to use Radio Resource Control (RRC) signaling to send said configuration parameters.
11. The base station of claim 10 , wherein the one or more processing circuits are further configured to use Medium Access Control (MAC) signaling to send the commands or other initiating signals.
12. The base station of claim 11 , wherein the one or more processing circuits are further configured to send one or more additional configuration parameters in conjunction with sending the commands or other initiating signals, such that the mobile station transmits the sounding signal based on earlier-received said configuration parameters, as modified by or updated by the one or more additional configuration parameters.
13. The base station of claim 8 , wherein the one or more processing circuits are further configured to subsequently send the command or other initiating signal to the mobile station implicitly by sending an uplink scheduling grant to the mobile station.
14. The base station of claim 8 , wherein the one or more processing circuits are further configured to subsequently send the command or other initiating signal to the mobile station comprises explicitly sending a sounding signal initiation command via downlink signaling.
15. A mobile station configured for operation in a wireless communication network and comprising one or more processing circuits configured to:
receive configuration parameters for a sounding signal to be transmitted by the mobile station; and
subsequently transmit a sounding signal in accordance with the configuration parameters, in response to receiving a separate command or other initiating signal, wherein the separate command or other initiating signal comprises an implicit command that commands the mobile station to initiate sounding signal transmission using scheduling information received by the mobile station.
16. The mobile station of claim 15 , wherein the one or more processing circuits are further configured to transmit the sounding signal additionally in accordance with any additional configuration parameters received with the separate command or other initiating signal.
17. A method implemented at a mobile station configured for operation in a wireless communication network, said method comprising:
receiving configuration parameters for a sounding signal to be transmitted by the mobile station; and
subsequently transmitting a sounding signal in accordance with the configuration parameters, in response to receiving a separate command or other initiating signal, wherein the separate command or other initiating signal comprises an implicit command that commands the mobile station to initiate sounding signal transmission using scheduling information received by the mobile station.
18. The method of claim 17 , wherein the configuration parameters comprising configuration parameters received with the separate command or other initiating signal.
19. The method of claim 1 , wherein the configuration parameters for the sounding signal are of the following types: time domain parameters, frequency domain parameters, or parameters specifying a modulation scheme.
20. The base station of claim 8 , wherein the configuration parameters for the sounding signal are of the following types: time domain parameters, frequency domain parameters, or parameters specifying a modulation scheme.