UPLINK DATA TRANSMISSION METHOD AND TERMINAL APPARATUS

• US 20110093755A1
• Filed: 12/22/2010
• Published: 04/21/2011
• Est. Priority Date: 06/23/2008
• Status: Abandoned Application

• Current Assignee: Huawei Technologies Co., Ltd. (Huawei Investment & Holding Co., Ltd.)
• Original Assignee: Huawei Technologies Co., Ltd. (Huawei Investment & Holding Co., Ltd.)
• Inventors: GAO, Wen
• Application Number:
  US12/975,602
• Publication Number:
  US 20110093755A1
• Time in Patent Office: Days
• US Class Current: 714/748
• CPC Class Codes: H04L 1/0003 by switching between different modulation schemes
• CPC Class Codes: H04L 1/1819 with retransmission of additional or different redundancy
• CPC Class Codes: H04L 1/1896 ARQ related signaling

Abstract

In the field of radio communications, an uplink data transmission method is provided, which includes: receiving first Physical Downlink Control Channel (PDCCH) signaling sent by a Base Station (BS); and if initial transmission is determined according to a New Data Indicator (NDI) of the first PDCCH signaling, determining that a Modulation Code Scheme (MCS) in the first PDCCH signaling is a normal MCS, and performing an uplink data transmission. A terminal apparatus is further provided. Therefore, the effectiveness of the uplink data transmission is guaranteed in the case that the PDCCH signaling of scheduling initial transmission is lost in the uplink data transmission, and when the uplink data is transmitted, packet loss and false indication of a lower layer to transmit data are avoided.

Claims

1. An uplink data transmission method, comprising:

receiving first Physical Downlink Control Channel (PDCCH) signaling sent by a Base Station (BS); and

if a transmission scheduled in the first PDCCH signaling is determined as an initial transmission according to a New Data Indicator (NDI) in the first PDCCH signaling, and a Modulation Code Scheme (MCS) in the first PDCCH signaling is determined as a normal MCS, performing an uplink data transmission.

2. The uplink data transmission method according to claim 1, wherein in the uplink data transmission, a data Transport Block (TB) is carried onto a Hybrid Automatic Repeat reQuest (HARQ) Buffer, an HARQ process is instructed to perform the uplink data transmission and the MCS is marked as normal.

3. The uplink data transmission method according to claim 1, wherein before the MCS in the first PDCCH signaling is determined as the normal MCS, the method further comprises:

a data TB is carried onto an HARQ Buffer, an HARQ process is instructed to perform the uplink data transmission; and

the MCS in the first PDCCH signaling is determined as a normal MCS, performing the uplink data transmission comprises;

the HARQ process determines that the MCS is the normal MCS, performing the uplink data transmission and marking the MCS as normal.

4. The uplink data transmission method according to claim 1, wherein the MCS in the first PDCCH signaling is determined as a normal MCS comprises:

if a Redundancy Version (RV) in the first PDCCH signaling is RV0, the MCS is determined as the normal MCS.

5. The uplink data transmission method according to claim 1, wherein the MCS in the first PDCCH signaling is determined as a normal MCS comprises:

if the MCS contained in the first PDCCH signaling is non-empty, the MCS is determined as the normal MCS.

6. The uplink data transmission method according to claim 1, further comprising:

if the MCS is an abnormal MCS, an MCS is selected in an MCS list for the uplink data transmission.

7. The uplink data transmission method according to claim 2, further comprising:

receiving a Negative Acknowledgement (NACK) and second PDCCH signaling sent by the BS, wherein the NACK and the second PDCCH signaling are sent by the BS if the BS fails to acquire the uplink data, and an NDI in the second PDCCH signaling is the same as the NDI in the first PDCCH signaling; and

performing an adaptive retransmission if the MCS is marked as normal.

8. The uplink data transmission method according to claim 3, further comprising:

receiving a NACK and second PDCCH signaling sent by the BS, wherein the NACK and the second PDCCH signaling are sent by the BS if the BS fails to acquire the uplink data, and an NDI in the second PDCCH signaling is the same as the NDI in the first PDCCH signaling; and

performing an adaptive retransmission if the MCS is marked as normal.

9. The uplink data transmission method according to claim 2, further comprising:

receiving a NACK sent by the BS, wherein the NACK is sent by the BS if the BS fails to acquire the uplink data; and

performing a non-adaptive retransmission if the MCS is marked as normal.

10. The uplink data transmission method according to claim 3, further comprising:

receiving a NACK sent by the BS, wherein the NACK is sent by the BS if the BS fails to acquire the uplink data; and

performing a non-adaptive retransmission if the MCS is marked as normal.

11. The uplink data transmission method according to claim 1, wherein a transmission scheduled in the first PDCCH signaling is determined as an initial transmission according to the NDI in the first PDCCH signaling comprises:

comparing a saved NDI with the NDI in the first PDCCH signaling, and if the two NDIs are different, the transmission scheduled in the first PDCCH signaling is determined as the initial transmission.

12. A terminal apparatus, comprising:

a receiving unit, configured to receive first Physical Downlink Control Channel (PDCCH) signaling sent by a Base Station (BS);

a determining unit, configured to determine whether a Modulation Code Scheme (MCS) in the first PDCCH signaling is a normal MCS, if a transmission scheduled in the first PDCCH signaling is determined as initial transmission according to a New Data Indicator (NDI) in the first PDCCH signaling received by the receiving unit; and

a transmitting unit, configured to perform an uplink data transmission if the determining unit determines that the MCS is a normal MCS.

13. The terminal apparatus according to claim 12, wherein the transmitting unit further comprises:

a carrying unit, configured to carry a data Transport Block (TB) onto a Hybrid Automatic Repeat reQuest (HARQ) Buffer, instruct an HARQ process to perform the uplink data transmission and mark the MCS as normal.

14. The terminal apparatus according to claim 12, wherein the terminal apparatus further comprises:

a carrying unit, configured to carry a data TB onto an HARQ Buffer, and instruct the HARQ process to perform the uplink data transmission if the determining unit determines the transmission scheduled in the first PDCCH signaling as the initial transmission according to the NDI in the first PDCCH signaling; and

the transmitting unit is further configured to perform the uplink data transmission on the data TB carried by the carrying unit onto the HARQ Buffer and mark the MCS as normal, if the determining unit determines that the MCS is the normal MCS.

15. The terminal apparatus according to claim 12, wherein the determining unit is further configured to determine that the MCS is the normal MCS if a Redundancy Version (RV) in the first PDCCH signaling is RV0.

16. The terminal apparatus according to claim 12, wherein the determining unit is further configured to determine that the MCS is the normal MCS if the MCS contained in the first PDCCH signaling is non-empty.

17. The terminal apparatus according to claim 13, wherein the receiving unit is further configured to receive a Negative Acknowledgement (NACK) and second PDCCH signaling sent by the BS, the NACK and the second PDCCH signaling are sent by the BS if the BS fails to acquire the uplink data, and an NDI in the second PDCCH signaling is the same as the NDI in the first PDCCH signaling;

and

the transmitting unit is further configured to perform an adaptive retransmission if the MCS is marked as normal.

18. The terminal apparatus according to claim 14, wherein the receiving unit is further configured to receive a Negative Acknowledgement (NACK) and second PDCCH signaling sent by the BS, the NACK and the second PDCCH signaling are sent by the BS if the BS fails to acquire the uplink data, and an NDI in the second PDCCH signaling is the same as the NDI in the first PDCCH signaling;

and

the transmitting unit is further configured to perform an adaptive retransmission if the MCS is marked as normal.

19. The terminal apparatus according to claim 13, wherein the receiving unit is further configured to receive a NACK sent by the BS, and the NACK is sent by the BS if the BS fails to acquire the uplink data;

and

the transmitting unit is further configured to perform a non-adaptive retransmission if the MCS is marked as normal.

20. The terminal apparatus according to claim 14, wherein the receiving unit is further configured to receive a NACK sent by the BS, and the NACK is sent by the BS if the BS fails to acquire the uplink data;

and

the transmitting unit is further configured to perform a non-adaptive retransmission if the MCS is marked as normal.