Base station side device and method for wireless communication, and user side device and method for wireless communication

1. A device at a base station side for wireless communications, comprising:

circuitry configured to:

determine dynamically, based on transmission characteristics related to a user equipment, a reference signal and an associated resource element to be used by the user equipment from a set of available reference signals and resource elements of the base station; and

generate reference signal configuration information for the user equipment, with the configuration information containing an indication of a sequence number of a combination of the reference signal and the associated resource element to be used by the user equipment,

wherein the sequence number of the combination of the reference signal and the associated resource element is associated with a sequence number of an antenna port, and each antenna port is configured to transmit a different combination of reference signal and associated resource element, and

wherein the circuitry is configured to generate a bitmap based on the sequence number of the combination of the reference signal and the associated resource element to be used by the user equipment, with each bit of the bitmap representing whether a combination of a reference signal and an associated resource element corresponding to the bit is to be used by the user equipment.

2. The device according to claim 1 , wherein the circuitry is configured to determine the reference signal to be used by a particular user equipment served by the base station.

3. The device according to claim 1 , wherein the circuitry is configured to determine a same reference signal for all user equipment served by the base station.

4. The device according to claim 1 , wherein the circuitry is configured to determine an uplink reference signal to be used by the user equipment with respect to other user equipment served by the base station.

5. The device according to claim 1 , wherein the circuitry is configured to determine, with respect to user equipment served by another base station, an uplink reference signal to be used by the user equipment served by the present base station.

6. The device according to claim 1 , wherein the circuitry is further configured to:

divide all of the available reference signals into a plurality of subsets; and

select, for each user equipment, at least a portion of the reference signals in at least one of the subsets,

wherein the reference signal configuration information comprises a sequence number of the subset where the selected reference signal is located and a sequence number of the selected reference signal in the subset.

7. The device according to claim 1 , wherein

the device at the base station side serves as the base station, and

the circuitry is further configured to notify the user equipment of the reference signal configuration information via a high level signaling.

8. The device according to claim 7 , wherein the high level signaling is RRC signaling.

9. The device according to claim 1 , wherein the reference signal is at least one of the following downlink reference signals: a channel status information reference signal (CSI-RS) and a downlink demodulation reference signal (DMRS).

10. The device according to claim 9 , wherein the reference signal is a beam-formed reference signal.

11. The device according to claim 1 , wherein the reference signal is at least one of the following uplink reference signals: a sounding reference signal (SRS) and an uplink demodulation reference signal (DMRS).

12. The device according to claim 1 , wherein the transmission characteristics comprise at least one of device parameters, transmission requirements, a channel status, interference conditions and a geographical location of the user equipment.

13. The device according to claim 1 , wherein the reference signal includes an uplink demodulation reference signal (DMRS) or a downlink DMRS.

14. A device at a user equipment side for wireless communications, comprising:

circuitry configured to:

determine, based on reference signal configuration information for the user equipment from a base station, a sequence number of a combination of a reference signal and associated resource element to be used by the user equipment; and

transmit and receive the reference signal using the associated resource element based on an antenna port associated with the sequence number of the reference signal,

wherein the reference signal configuration information comprises a bitmap generated based on the sequence number of the combination of the reference signal and the associated resource element to be used by the user equipment, with each bit of the bitmap representing whether a combination of a reference signal and an associated resource element corresponding to the bit is to be used by the user equipment.

15. The device according to claim 14 , wherein the reference signal is a downlink reference signal, and the user equipment measures a channel status based on the received reference signal.

16. The device according to claim 14 , wherein the reference signal is an uplink reference signal, and the user equipment transmits the reference signal based on the antenna port associated with the sequence number of the reference signal.

17. The device according to claim 14 , wherein the circuitry is further configured to receive the reference signal configuration information via a high level signaling.

18. The device according to claim 17 , wherein the high level signaling is RRC signaling.

19. The device according to claim 14 , wherein all available reference signals are divided into a plurality of subsets, and the reference signal configuration information represents at least a portion of the reference signals in at least one of the subsets.

20. The device according to claim 19 , wherein the reference signal configuration information comprises a sequence number of the subset where a selected reference signal is located and a sequence number of the selected reference signal in the subset.

21. The device according to claim 14 , wherein the reference signal includes an uplink demodulation reference signal (DMRS) or a downlink DMRS.

22. A method at a user equipment side for wireless communications, comprising:

determining, based on reference signal configuration information for the user equipment from a base station, a sequence number of a combination of a reference signal and an associated resource element to be used by the user equipment; and

transmitting and receiving the reference signal using the associated resource element via an antenna port associated with the sequence number of the combination of the reference signal and the associated resource element,

wherein the reference signal configuration information comprises a bitmap generated based on the sequence number of the combination of the reference signal and the associated resource element to be used by the user equipment, with each bit of the bitmap representing whether a combination of a reference signal and an associated resource element corresponding to the bit is to be used by the user equipment.

23. The method according to claim 22 , wherein the reference signal includes an uplink demodulation reference signal (DMRS) or a downlink DMRS.