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Wireless device, first access node and methods therein
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A technology for wireless devices and access nodes, which is applied in wireless communication, synchronization devices, power management and other directions to achieve the effect of increasing robustness and improving performance
Active Publication Date: 2022-07-05
TELEFON AB LM ERICSSON (PUBL)
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Abstract
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This is especially a drawback when several eNodeBs have difficulty receiving PRACH at the same time, and when several eNodeBs are not perfectly synchronized with each other
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no. 1 example
[0157] The first signal S1 and the second signal S2 are transmitted to the wireless device 206 from the first and second ANs 208, 210, respectively. Accordingly, the wireless device 206 receives respective DL signals S1, S2 from the first AN 208 and the second AN 210, respectively. This involves actions 301 and 501 described above.
[0158]By means of the respective received signals S1 and S2, the wireless device 206 can obtain respective DL synchronization for the first and second ANs 208, 210. The expression "DL synchronization" as used in this disclosure means time and frequency synchronization. Since the same reference signals (eg, the first and second signals S1 and S2 are the same signal) are used by the first and second ANs 208, 210, from the wireless device 206 perspective, they can be considered as channel-responsive different taps.
[0159] Based on the respective DL synchronizations T_S_AN1, T_S_AN2 from the first and second ANs 208, 210, respectively, the wirele...
no. 2 example
[0179] In this case, the wireless device 206 served by an AN (eg, by the third AN 212 ) wants to send an uplink signal S5 (eg, reference Signal). the situation is Figure 9 shown schematically in . As previously mentioned, the wireless device 206 receives the first signal from the first AN 208 and the second single signal S2 from the second AN 210 . This involves, for example, actions 301 and 501 described above.
[0180] The first and second signals S1, S2 may be referred to as DL signals. With the aid of the first and second signals S1, S2, the wireless device 206 determines the respective DL synchronization, eg the timing T_S_AN1, T_S_AN2 of the respective signals S1, S2.
[0181] As previously mentioned, based on the respective DL synchronization T_S_AN1, T_S_AN2, the wireless device 206 may determine the relative timing intervals TI_rel_AN1, TI_rel_AN2 for a single RA preamble transmission for each AN 208, 210 through the DL synchronization and range X, TI_rel_AN1, TI...
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Abstract
Wireless device 206 and methods therein for enabling a single random access (RA) preamble to be received by a first access node (AN) 208 and by a second AN 210, the first and second ANs being asynchronous ANs . The wireless device and the first and second ANs operate in the wireless communication network 200 . The wireless device receives the first signal from the first AN and the second signal from the second AN. Based on the received first and second signals, the wireless device determines an overlapping time window during which transmissions from the wireless device are receivable by the first and second ANs, and sends data to the wireless device during the determined overlapping time window. The first and second ANs transmit a single RA preamble.
Description
technical field [0001] Embodiments herein relate to a wireless apparatus, a first access node (AN) and to methods therein. In particular, embodiments herein relate to enabling a single random access (RA) preamble to be received by a first AN and a second AN. Background technique [0002] A communication device, such as a terminal or wireless device, is also referred to, eg, as user equipment (UE), a mobile terminal, a wireless terminal, and / or a mobile station. Such terminals are enabled to communicate wirelessly in wireless communication systems or cellular communication networks, sometimes also referred to as cellular radio systems or cellular networks. Communication may be via a radio access network (RAN) and possibly one or more core networks included within the cellular communication network, eg between two terminals, between a terminal and a regular telephone and / or between a terminal and a server be executed. [0003] The above-mentioned terminal or wireless device...
Claims
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