Method for data transmission and base station and user equipment using the same

Abstract

A method for data transmission, a base station using the same and a user equipment (UE) using the same are provided. According to an exemplary embodiment, the present disclosure provides a method of data transmission, adapted for a user equipment (UE), the method contains the steps of receiving from a base station signaling comprising a sub-frame which comprises a control region and a data region; decoding from the data region a first transport block indicated by a first downlink assignment from the control region; and decoding the first transport block to obtain a first control information, wherein the first control information includes a downlink assignment, an uplink grant, or an extended control region indicator.

1 . A method of data transmission, adapted for a user equipment (UE), the method comprising:
 receiving from a base station signaling comprising a sub-frame which comprises a control region and a data region;   decoding from the data region a first transport block indicated by a first downlink assignment from the control region; and   decoding the first transport block to obtain a first control information.   
     
     
         2 . The method of  claim 1 , wherein the first control information comprises a downlink assignment, an uplink grant, or an extended control region indicator. 
     
     
         3 . The method of  claim 1 , wherein  claim 1  further comprises:
 if the first control information indicates a downlink assignment, obtaining a second transport block according to the first control information; and 
 processing the second transport block. 
 
     
     
         4 . The method of  claim 3 , wherein the second transport block may be shared by multiple UEs. 
     
     
         5 . The method of  claim 3 , wherein the second transport block contains multiple data for multiple UEs with each data designated for a different UE. 
     
     
         6 . The method of  claim 3  wherein the step of processing the second transport block comprises:
 decoding the second transport block; 
 obtaining a second control information from the second transport block; and 
 processing the second control information according to the content of the second control information. 
 
     
     
         7 . The method of  claim 1 , wherein if the first control information indicates an extended control region indicator,  claim 1  further comprises:
 obtaining an extended control region according to the first control information; 
 decoding the extended control region to obtain a second control information; 
 if the second control information indicates a downlink assignment, obtaining a second transport block according to the second control information and processing the second transport block; and 
 if the second control information indicates an uplink grant, storing the uplink grant and transmitting data according to the uplink grant. 
 
     
     
         8 . The method of  claim 1 , wherein the step of decoding the first transport block to obtain the first control information, comprises:
 decoding the first transport block to obtain packet data units comprising a header region and a payload region, wherein the header region comprises a type indicator, and the payload region comprises a control information.   
     
     
         9 . The method of  claim 8 , wherein the control information comprises at least one selected from the group consisting of:
 a type indicator to indicate an uplink grant, a downlink assignment, and an extended control region indicator;   a carrier indicator to indicate one of multi-carriers; and   a timing indicator to indicate a sub-frame number.   
     
     
         10 . The method of  claim 8 , wherein a logical channel identification (LCID) in a logical channel identification field of the header region is used as the type indicator which indicates a downlink assignment, an uplink grant, or an extended control region indicator. 
     
     
         11 . The method of  claim 8 , wherein the type indicator is in two reserve bits of sub-headers of the header region to indicate a downlink assignment, an uplink grant, or an extended control region indicator. 
     
     
         12 . The method of  claim 8 , wherein the type indicator is shared among a logical channel identification and two reserve bits of sub-headers of the header region to indicate a downlink assignment, an uplink grant, or an extended control region indicator. 
     
     
         13 . The method of  claim 1  further comprises:
 if the first control information indicates a downlink assignment received at time t, decoding a second transport block at time t+k according to the first control information, wherein k is predetermined or is a value of a timing indicator in the first control information, and processing the second transport block at time t+k. 
 
     
     
         14 . The method of  claim 13  further comprises:
 receiving a second downlink assignment at time t+k from decoding the control region; 
 decoding a third transport block according to the second downlink assignment; and 
 processing the third transport block. 
 
     
     
         15 . The method of  claim 1 , further comprises:
 if the first control information indicates an uplink grant received at time t, transmitting an uplink data at time t+n according to the first control information, wherein n is predetermined or is a value of a timing indicator in the first control information.   
     
     
         16 . The method of  claim 15 , further comprising:
 receiving a second downlink assignment at time t+n from decoding the control region;   decoding a second transport block according to the second downlink assignment; and   processing the second transport block and transmitting the uplink data according to the first control information.   
     
     
         17 . A user equipment (UE), comprising:
 a transceiver, configured to transmit and receive wireless signals; and   a processor, coupled to the transceiver, configured to:   receive from a base station signaling comprising a sub-frame which comprises a control region and a data region;   decode from the data region a first transport block indicated by a first downlink assignment from the control region; and   decode the first transport block to obtain a first control information.   
     
     
         18 . The UE of  claim 17 , wherein the first control information comprises a downlink assignment, an uplink grant, or an extended control region indicator. 
     
     
         19 . The UE of  claim 17 , wherein if the first control information indicates a downlink assignment, the processor is further configured to:
 obtain a second transport block according to the first control information; and   process the second transport block which may comprise another control information.   
     
     
         20 . The UE of  claim 19 , wherein the second transport block may be shared by multiple UEs. 
     
     
         21 . The UE of  claim 19 , wherein the second transport block contains multiple data for multiple UEs with each data designated for a different UE. 
     
     
         22 . The UE of  claim 17  wherein if the first control information indicates an extended control region indicator, the processor is further configured to:
 obtain an extended control region according to the first control information; 
 decode the extended control region to obtain a second control information; 
 if the second control information indicates a downlink assignment, obtain a second transport block according to the second control information and processing the second transport block; and 
 if the second control information indicates an uplink grant, store the uplink grant and transmit data according to the uplink grant. 
 
     
     
         23 . The UE of  claim 17 , wherein the processor is configured to decode the first transport block to obtain the first control information comprises:
 decoding the first transport block to obtain packet data units comprising a header region and a payload region, wherein the header region comprises a type indicator, and the payload region comprises a control information.   
     
     
         24 . The UE of  claim 23 , wherein the control information comprises at least one selected from the group consisting of:
 a type indicator to indicate an uplink grant, a downlink assignment, and an extended control region indicator;   a carrier indicator to indicate one of multi-carriers; and   a timing indicator to indicate a sub-frame number.   
     
     
         25 . The UE of  claim 23 , wherein the type indicator is in a logical channel identification (LCID) field of the header region which indicates a downlink assignment, an uplink grant, or an extended control region indicator. 
     
     
         26 . The UE of  claim 23  wherein the type indicator is in two reserve bits of sub-headers of the header region to indicator a downlink assignment, an uplink grant, or an extended control region indicator. 
     
     
         27 . The UE of  claim 23 , wherein the type indicator is shared among a logical channel identification and two reserve bits of sub-headers of the header region to indicate a downlink assignment, an uplink grant, or an extended control region indicator. 
     
     
         28 . The UE of  claim 17 , wherein the processor is further configured to:
 receive a second transport block at time t+k according to the first control information if the first control information indicates a downlink assignment received at time t, wherein k is predetermined or is a value of a timing indicator in the first control information, and process the second transport block.   
     
     
         29 . The UE of  claim 28  further wherein the processor further configured to:
 receive a second downlink assignment at time t+k from decoding the control region; 
 decode a third transport block according to the second downlink assignment; and 
 process the third transport block. 
 
     
     
         30 . The UE of  claim 17 , wherein the processor is further configured to:
 transmit an uplink data at time t+n according to the first control information if the first control information indicates an uplink grant received at time t, wherein n is predetermined or is a value of a timing indicator in the first control information.   
     
     
         31 . The UE of  claim 30 , wherein the processor further configured to:
 receive a second downlink assignment at time t+n from decoding the control region;   decode a second transport block according to the second downlink assignment; and   process the second transport block and transmit the uplink data according to the first control information.   
     
     
         32 . A base station comprising:
 a transceiver, configured to transmit and receive wireless signals; and   a processor, coupled to the transceiver, configured to:
 configure data comprising a sub-frame which comprises a control region and a data region; 
 encoding in the control region a first downlink assignment; 
 encoding in the data region a first transport block indicated by the first downlink assignment; and 
 encoding the first transport block to comprise a first control information. 
   
     
     
         33 . The base station of  claim 32 , wherein the first control information comprises a downlink assignment, an uplink grant, or an extended control region indicator. 
     
     
         34 . The base station of  claim 32 , wherein if the first control information comprises a downlink assignment, according to the first control information, the processor is further configured to encode in the data region the second transport block which may comprise another control information. 
     
     
         35 . The base station of  claim 34 , wherein the second transport block may be shared by multiple UEs. 
     
     
         36 . The base station of  claim 34 , wherein the second transport block contains multiple data for multiple UEs with each data designated for a different UE. 
     
     
         37 . The base station of  claim 32 , wherein if the first control information comprises an extended control region indicator, the processor is further configured to:
 encode a second control information in the extended control region which is indicated by the first control information; and   if the second control information indicates a downlink assignment, encode in the data region a second transport block according to the second control information.   
     
     
         38 . The base station of  claim 32 , wherein the processor is configured to encode the first transport block to comprise the first control information comprises:
 encoding in the first transport block packet data units comprising a header region and a payload region, wherein the header region comprises a type indicator, and the payload region comprises a control information.   
     
     
         39 . The base station of  claim 38 , wherein the control information comprises at least one selected from the group consisting of:
 a type indicator to indicate an uplink assignment, a downlink assignment, and an extended control region indicator;   a carrier indicator to indicate one of multi-carriers; and   a timing indicator to indicate a sub-frame number.   
     
     
         40 . The base station of  claim 38 , wherein the type indicator is in a logical channel identification (LCID) field of the header region which indicates a downlink assignment, an uplink grant, or an extended control region indicator to indicate the type of the control information. 
     
     
         41 . The base station of  claim 38 , wherein the type indicator is in two reserve bits of sub-headers of the header region to indicator a downlink assignment, an uplink grant, or an extended control region indicator to indicate the type of the control information. 
     
     
         42 . The base station of  claim 38 , wherein the type indicator is shared among a logical channel identification and two reserve bits of sub-headers of the header region to indicate a downlink assignment, an uplink grant, or an extended control region indicator. 
     
     
         43 . The base station of  claim 32 , wherein the processor is further configured to:
 transmit a second transport block encoded in the data region at time t+k according to the first control information when the first control information indicates a downlink assignment transmitted at time t, wherein k is predetermined or is a value of a timing indicator in the first control information.   
     
     
         44 . The base station of  claim 43 , wherein the processor is further configured to:
 transmit a second downlink assignment encoded in the control region at time t+k;   encode in the data region a third transport block according to the second downlink assignment; and   transmit the third transport block.   
     
     
         45 . The base station of  claim 32 , wherein the processor further configured to:
 receive an uplink data at time t+n according to the first control information if the first control information indicates an uplink grant transmitted at time t, wherein n is predetermined or is a value of a timing indicator in the first control information.   
     
     
         46 . The base station of  claim 45 , wherein the processor further configured to:
 transmit a second downlink assignment encoded in the control region at time t+n;   encode in the data region a second transport block based on the second downlink assignment; and   transmit the second transport block and receive the uplink data according to the first control information.