A Node and Method for Downlink Communications Scheduling
Example embodiments presented herein are directed towards a base station ( 401 ), and corresponding method, for scheduling a downlink broadcast transmission using PDSCH. The base station ( 401 ) is also configured to provide an OFDM PDSCH to a wireless terminal ( 505 A) which monitors ePDCCH for receiving downlink control data. Thus, by applying such a symbol, a wireless terminal ( 505 A) which monitors ePDCCH and a wireless terminal ( 505 B) which monitors PDCCH may receive the same downlink broadcast transmission on PDSCH. Example embodiments are also directed towards a wireless terminal ( 505 A) for receiving such downlink broadcast transmissions.
1 - 29 . (canceled)
30 . A method in a base station for scheduling a downlink broadcast transmission using a Physical Downlink Shared Channel (PDSCH) and for providing an Orthogonal Frequency Division Multiplexing (OFDM) PDSCH start symbol for identifying a start of said broadcast transmission, said base station being comprised in a wireless communications network, the method comprising:
providing, to at least one wireless terminal that monitors an enhanced Physical Downlink Control Channel (ePDCCH) for receiving downlink control information, the OFDM PDSCH start symbol, wherein the OFDM PDSCH start symbol is provided in a message transmitted outside of a control region of a subframe, said control region comprising at least a PDCCH.
31 . The method of claim 30 , where a size of said control region is zero symbols and the OFDM PDSCH start symbol is zero.
32 . The method of claim 30 , wherein the message is a Downlink Control Information (DCI) message and the providing further comprises sending the DCI message via the ePDCCH.
33 . The method of claim 32 , further comprising configuring a Physical Control Format Indicator Channel (PCFICH) control format indicator (CFI) value in a subframe, in which downlink broadcast transmissions are sent, to be equal to the OFDM PDSCH start symbol.
34 . The method of claim 30 , wherein the message is a radio resource control (RRC) message and the providing further comprises sending the RRC message via PDSCH.
35 . The method of claim 34 , further comprising configuring a Physical Control Format Indicator Channel (PCFICH) control format indicator (CFI) value in a subframe, in which downlink broadcast transmissions are sent, to be equal to the OFDM PDSCH start symbol, wherein the OFDM PDSCH start symbol is a radio resource control (RRC) configured value.
36 . The method of claim 30 , further comprising sending, to at least one other wireless terminal that monitors the PDCCH for receiving downlink broadcast transmissions, same downlink broadcast transmissions scheduled in the PDSCH.
37 . A base station for scheduling a downlink broadcast transmission using a Physical Downlink Shared Channel (PDSCH) and for providing an Orthogonal Frequency Division Multiplexing (OFDM) PDSCH start symbol for identifying a start of said broadcast transmissions, said base station being comprised in a wireless communications network, the base station comprising:
processing circuitry configured to provide, to at least one wireless terminal that monitors an enhanced Physical Downlink Control Channel (ePDCCH) for receiving downlink control information, the OFDM PDSCH start symbol, wherein the OFDM PDSCH start value is provided in a message transmitted outside of a control region of the subframe, said control region comprising at least a PDCCH.
38 . The base station of claim 37 , where a size of said control region is zero symbols and the OFDM PDSCH start symbol is zero.
39 . The base station of claim 37 , wherein the message is a Downlink Control Information (DCI) message, and wherein the base station further comprises radio circuitry configured to send the DCI message via the ePDCCH.
40 . The base station of claim 39 , wherein the processing circuitry is further configured to configure a Physical Control Format Indicator Channel (PCFICH) control format indicator (CFI) value in a subframe, in which downlink broadcast transmissions are sent, to be equal to the OFDM PDSCH start symbol.
41 . The base station of claim 37 , wherein the message is a Radio Resource Control (RRC) message, and the base station further comprises radio circuitry configured to send the RRC message via PDSCH.
42 . The base station of claim 41 , further comprising processing circuitry configured to configure a Physical Control Format Indicator Channel (PCFICH) control format indicator (CFI) value in a subframe, in which downlink broadcast transmissions are sent, to be equal to the OFDM PDSCH start symbol, wherein the OFDM PDSCH start symbol is a radio resource control (RRC) configured value.
43 . The base station of claim 37 , wherein the radio circuitry is further configured to send, to at least one other wireless terminal that monitors the PDCCH for receiving downlink broadcast transmissions, same downlink broadcast transmissions scheduled in the PDSCH.
44 . A method in a wireless terminal for receiving downlink broadcast transmissions in a Physical Downlink Shared Channel (PDSCH) said wireless terminal being comprised in a wireless communications network, the method comprising:
monitoring an enhanced Physical Downlink Control Channel (ePDCCH) for downlink control information;
obtaining an Orthogonal Frequency Division Multiplexing (OFDM) PDSCH start symbol for identifying a start of the downlink broadcast transmissions, wherein said OFDM PDSCH start symbol is provided in a message transmitted outside of a control region of a subframe, said control region comprising at least a PDCCH, or wherein the OFDM PDSCH start symbol is based on a predefined value; and
receiving downlink broadcast transmissions on the PDSCH, based on the OFDM PDSCH start symbol.
45 . The method of claim 44 , where a size of said control region is zero symbols and the OFDM PDSCH start symbol is zero.
46 . The method of claim 44 , wherein the message is a Downlink Control Information (DCI) message and the obtaining further comprises receiving, from a network node, the DCI message via the ePDCCH.
47 . The method of claim 44 , wherein the message is a Radio Resource Control (RRC) message and the obtaining further comprises receiving, from a network node, the RRC message via PDSCH.
48 . The method of claim 44 , wherein the obtaining further comprises retrieving the OFDM PDSCH start value based on a static value or a pre-configured value based on a system bandwidth.
49 . The method of claim 44 , wherein the receiving further comprising receiving same downlink broadcast transmissions on the PDSCH as a wireless terminal that monitors the PDCCH for receiving downlink control information.
50 . A wireless terminal for receiving downlink broadcast transmissions in a Physical Downlink Shared Channel (PDSCH) said wireless terminal being comprised in a wireless communications network, the wireless terminal comprising:
processing circuitry configured to monitor an enhanced Physical Downlink Control Channel (ePDCCH) for downlink control information;
processing circuitry configured to obtain an Orthogonal Frequency Division Multiplexing (OFDM) PDSCH start symbol for identifying a start of said downlink broadcast transmissions, said OFDM PDSCH start value being provided in a message transmitted outside of a control region of a subframe, said control region comprising at least a PDCCH, or the OFDM PDSCH start symbol is based on a predefined value; and
radio circuitry configured to receive downlink broadcast transmissions on the PDSCH based on the OFDM PDSCH start symbol.
51 . The wireless terminal of claim 50 , where a size of said control region is zero symbols and the OFDM PDSCH start symbol is zero.
52 . The wireless terminal of claim 50 , wherein the message is a Downlink Control Information (DCI) message and the radio circuitry is configured to receive the DCI message via the ePDCCH.
53 . The wireless terminal of claim 50 , wherein the message is a Radio Resource Control (RRC) message and the radio circuitry is configured to receive the RRC message via PDSCH.
54 . The wireless terminal of claim 50 , wherein the processing circuitry is further configured to retrieve the OFDM PDSCH start value based on a static value or a pre-configured value based on a system bandwidth.
55 . The wireless terminal of claim 50 , wherein the receiving circuitry is further configured to receive same downlink broadcast transmissions on the PDSCH as a wireless terminal that monitors the PDCCH for receiving downlink control information.
56 . The wireless terminal of claim 50 , wherein the network node is a base station or a relay node.