What is the difference between soft and softer handover?

What is the difference between soft and softer handover?

Soft handover – handover between two sectors of the same cell of a NodeB is called soft handover. Softer handover – handover between two cells (different NodeB) is called softer handover.

What is soft handover and hard Handover?

Hard handover: This form of handover is essentially the same as that used for 2G networks where one link is broken and another established. Soft handover: This form of handover is a more gradual and the UE communicates simultaneously with more than one Node B or base station during the handover process.

What is the difference between soft and hard handoff?

Soft handoff never disconnects the current call where as hard handoff disconnects the current call and establishes connection with the new base station. Soft handoff mostly occurs at the times when you are travelling from one place to another place.

Which serves the soft hand off process?

Soft handover or soft handoff refers to a feature used by the CDMA and W-CDMA standards, where a cell phone is simultaneously connected to two or more cells (or cell sectors) during a call. If the sectors are from the same physical cell site (a sectorised site), it is referred to as softer handoff.

What do you mean by soft softer handoff?

Soft handoff is a “Make before break” handoff. That is, the mobile station (MS) is up on a call and moves from one base station (BS) to another, but the MS starts communicating with a new BS before terminating communications with the old BS. Soft handoffs can only be used between BSs on the same frequency.

What are the different types of handoff?

Handoffs may be classified into two types:

• Hard Handoff: Characterized by an actual break in the connection while switching from one cell or base station to another.
• Soft Handoff: Entails two connections to the cell phone from two different base stations.

What is delaying handoff?

A Delayed handoff is a two hand off level algorithm. If no neighboring cells are available after the second handoff level is reached, the call continues until the signal strength drops below the threshold level then the call is dropped.

How does soft handover work?

Softer handover is the situation where one base station receives two user signals from two adjacent sectors it serves. In the uplink direction the signals received at the base station are routed to the same rake receiver and then combined following the maximum ratio combining technique. …

What is softsofter handover?

Softer handover is the situation where one base station receives two user signals from two adjacent sectors it serves. In the case of softer handover the base station receives 2 separated signals through multi-path propagation.

What happened to soft/softer handover in LTE?

When LTE system was developed one of the big technical feature from UMTS Soft/Softer handover was missing from the architecture. There are many specific reasons why LTE dropped altogether soft handover (connect-before-break) from the system design.

What is connect-before-break (soft handover)?

As we all know that connect-before-break (soft handover) is a category of handover procedure where radio links are removed or added in such a manner that there is always one radio link connected to the UE. The entire radio links connected to UE at a particular instant of time are part of active set (This number can vary from 1 to 8).

What is the soft handover in UMTS?

Soft and softer handovers are only possible when UE is in connected state with dedicated channel (DCH). Even with HSDSCH (High-Speed Downlink Shared Channel) there is no soft handover in UMTS. In cased HSDPA communication there is only hard handover which is break before connect.