Reducing access channel delay in a wireless communication system
View Patent ↗A system and method for reducing access channel delay in a wireless communication system includes a step 601 of sending an initial access request response that includes identifiers of any initial access requests, including an indicator that indicates whether any more responses with identifiers are going to be sent within a predefined time period. A next step 602 includes receiving the response. A next step 604 includes recognizing that a particular identifier from the initial access request is not in the response. A next step 606 includes determining from the indicator that there will be no more responses with identifiers sent within the predefined time period. A next step 608 includes transmitting another initial access request before the end of the predefined time period.
1. An apparatus to be employed in a user equipment (UE), the apparatus including:
a processor to:
generate a first request to be transmitted to an eNodeB, wherein the first request is associated with an identifier and is to request access to a random access channel (RACH);
determine that a broadcast response from the eNodeB, which includes one or more random access responses (RARs), does not include a RAR with the identifier associated the first request;
determine that the broadcast response includes an indicator to indicate that the broadcast response is a last transmission related to a RACH opportunity within a predetermined time period; and
generate, based on determination that the broadcast response includes the indicator, a second request to be transmitted to the eNodeB prior to expiration of the predefined time period, the second request to request access to the RACH;
a transmitter, coupled with the processor, to transmit the first and second requests; and
a receiver, coupled with the processor, to receive the broadcast response,
wherein the indicator is a first indicator and the broadcast response further includes a second indicator that is a backoff indicator to indicate an overload condition of a cell of the eNB.
2. The apparatus of claim 1 , wherein the predetermined time period corresponds to an RAR window.
3. The apparatus of claim 1 , wherein the broadcast response includes a media access control message having a header, which includes the indicator, and a body.
4. The apparatus of claim 3 , wherein the indicator is a bit.
5. The apparatus of claim 1 , wherein the indicator is a reserved identifier that is not associated with any user equipment.
6. The apparatus of claim 1 , wherein the indicator is a particular order of identifiers in the broadcast response.
7. The apparatus of claim 1 , wherein the indicator is a duplicate identifier in the broadcast response.
8. The apparatus of claim 1 , wherein the broadcast response includes a media access control message having a header and a body, which includes the indicator.
9. An apparatus to be employed in a user equipment (UE), the apparatus including:
a processor to:
generate a first request to be transmitted to an eNodeB, wherein the first request is associated with an identifier and is to request access to a random access channel (RACH);
determine that a broadcast response from the eNodeB, which includes one or more random access responses (RARs), does not include a RAR with the identifier associated the first request;
determine that the broadcast response includes an indicator to indicate that the broadcast response is a last transmission related to a RACH opportunity within a predetermined time period; and
generate, based on determination that the broadcast response includes the indicator, a second request to be transmitted to the eNodeB prior to expiration of the predefined time period, the second request to request access to the RACH;
a transmitter, coupled with the processor, to transmit the first and second requests; and
a receiver, coupled with the processor, to receive the broadcast response, wherein the indicator is a value within a backoff indicator field in a media access control subheader, wherein the value does not identify an overload condition of a cell of the eNodeB.
10. A method comprising:
generating a first request to be transmitted to an eNodeB, wherein the first request is associated with an identifier and is to request access to a random access channel (RACH);
determining that a broadcast response from the eNodeB, which includes one or more random access responses (RARs), does not include a RAR with the identifier associated the first request;
determining that the broadcast response includes an indicator to indicate that the broadcast response is a last transmission related to a RACH opportunity within a predetermined time period; and
generating, based on determination that the broadcast response includes the indicator, a second request to be transmitted to the eNodeB prior to expiration of the predefined time period, the second request to request access to the RACH,
wherein the indicator is a value within a backoff indicator field in a media access control subheader, wherein the value does not identify an overload condition of a cell of the eNodeB.
11. The method of claim 10 , wherein the broadcast response includes a media access control message having a header, which includes the indicator as a bit, and a body.
12. The method of claim 10 , wherein the indicator is a reserved identifier that is not associated with any user equipment.
13. The method of claim 10 , wherein the indicator is a particular order of identifiers in the broadcast response or is a duplicate identifier in the broadcast response.
14. An apparatus to be employed in an eNodeB, the apparatus including:
a processor to:
determine one or more requests are received from one or more user equipments (UEs); and
generate a broadcast response that includes one or more random access responses (RARs); an identifier associated with at least one UE from the one more UEs; and an indicator to indicate that the broadcast response is a last transmission related to a random access channel opportunity within a predetermined period of time;
a receiver, coupled with the processor, to receive the one or more requests; and
a transmitter, coupled with the processor, to transmit the broadcast response,
wherein the indicator is a value within a backoff indicator field in a media access control subheader, wherein the value does not identify an overload condition of a cell of the eNodeB.
15. The apparatus of claim 14 , wherein the indicator is a bit.
16. The apparatus of claim 14 , wherein the indicator is a reserved identifier that is not associated with any user equipment.
17. The apparatus of claim 14 , wherein the indicator is a particular order of identifiers in the broadcast response.
18. The apparatus of claim 14 , wherein the indicator is a duplicate identifier in the broadcast response.